JP2017026117A - Universal pipe joint for liquid fluid passage and liquid fluid item processing machine using universal pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a universal pipe joint for liquid fluid in which a pipe installing work can be easily carried out even in a narrow space, a substantial cost reduction in pipe installing work can be attained, it shows a high connecting strength at a structure itself of the universal joint, a superior earthquake restriction and superior earthquake resistance.SOLUTION: This invention relates to a universal joint 100 for a pipe connection part in which end peripheral edges 12, 13 at a first or second fitting parts 3, 7 are formed at locations spaced apart from a reference plane T only by a length L by 21 to 23% in respect to either R1 or R2 of the maximum diameter lengths at the reference plane T of either first or second fitting parts 3, 7 toward a direction V opposite to a side where a straight line pipe part 1 is connected from the reference plane T defined in this invention.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a universal pipe joint for liquid fluid pipes used when connecting various pipes used as liquid fluid passages, and more specifically, is a passage for various liquid fluid flows made of liquid fluid. The subtle setting angle required for various connection parts of piping can be easily adjusted and set, and the joint strength for liquid fluid passages with high joint strength, excellent earthquake resistance and vibration control, and the use thereof The present invention relates to a liquid fluid processing apparatus.

Conventionally, ventilators for indoor ventilation are known to have an opening in the wall of the building and be directly attached to the opening, or to be installed on the ceiling or inside the wall. It has been. In recent years, installation types have become mainstream. In this installation type ventilator, connection to an external exhaust port attached to a wall of a building is performed using an elbow pipe or a bellows pipe formed integrally.

In other words, depending on the opening direction of the connection exhaust port on the installation type ventilator side, due to the relationship with the mounting position of the external exhaust port on the wall, misalignment occurs in the connection direction between the connection exhaust port and the external exhaust port, May not match. In this case, either the elbow pipe or the bellows pipe, or a combination of the elbow pipe and the bellows pipe is used to connect the connection exhaust port and the external exhaust port.

By the way, the elbow pipe is effective as a pipe joint for indoor ventilation because there is no unevenness on the inner surface that obstructs the flow of air, but because it is a pipe joint having a fixed bending angle such as 90 °, Depending on the misalignment of the direction (center misalignment angle) and the like, not only the work becomes very difficult, but the elbow pipe alone may not be able to cope with it. In this case, it is often performed by using a combination with a bellows tube having flexibility in a direction or a single bellows tube.
In this way, the bellows pipe can be adjusted smoothly and smoothly with respect to misalignment in the connection direction between the connection exhaust port and the external exhaust port. I can say that. However, the bellows pipe has a problem that a smooth circulation of room air cannot be expected, such as a high ventilation resistance, because fine irregularities exist on the inner surface of the pipe.
In particular, when bellows pipes are used for the external piping of range hoods that exhaust contaminated air generated during cooking to the outdoors, the fat and oil contained in the contaminated air is projected to uneven projections. Repeating this collision makes it easier for oil and fat to accumulate in the pipe, which is undesirable in terms of fire safety.

On the other hand, domestic wastewater in ordinary houses and high-rise houses also uses the narrow part between the building wall and the outer wall and the narrow part between the floor layer and the ceiling layer in the same way as the exhaust liquid fluid. Pipes for liquid fluids are arranged and installed, but the space for the pipes is generally limited to narrow passages in order to reduce construction costs. Therefore, in such an extremely narrow space portion, it is required to take a predetermined gradient defined by the Building Standard Law, and at the same time, in connection with the installation of the piping, the connection angle of the piping is arbitrarily changed, There is a problem that you have to connect.

In order to solve such a problem, conventionally, there is a bent tubular body portion called an elbow tube integrally molded with a synthetic resin, and the bending angle of the elbow tube is 45 degrees, 75 degrees, 90 degrees, and Elbow tubes limited to a plurality of predetermined specific angles manufactured by each manufacturer, such as 180 degrees, are used, but all have a certain angle specified by the manufacturer Therefore, no matter how these are combined, it is impossible to set the bending angle of the pipe to be connected to an arbitrary angle, and it is also possible to combine a plurality of these elbow pipes. Even if it is intended to have a predetermined bending angle, a considerable space is required around the group including the elbow pipe in the connecting portion. The plurality Be combined with Rubo tube for setting a predetermined slope and angle were carried impossible.

In addition, a free elbow fitting made of, for example, vinyl chloride resin, which is configured to change the connecting angle of two straight pipes arranged adjacent to each other by interposing a joint portion using a spherical surface in part. However, since the connectable refraction angle of the two straight pipe parts to be connected in the universal elbow fitting is about 10 to 20 degrees at most, its practical utility value is implemented. It is a state equal to nothing.
Therefore, in the past, it has been impossible to achieve the gradient defined by the above Building Standards Law in all the pipe layers, and therefore, a considerable part of the liquid fluid pipe section. However, in some cases, a high-pressure washing machine or the like is required at least once a year in the detached house and the high-rise house. Therefore, it is necessary to clean the inside of the liquid fluid piping section, and therefore, there is a great drawback that the management and maintenance costs are increased.

Alternatively, the fact that a straight pipe having a predetermined length is forcibly bent in the pipe connection processing space so that the pipe is treated with a specified gradient in appearance. The actual situation is that there is no end to the cases of making and cheating. Since it continues to be applied, there is a great social problem that the durability on the piping system is greatly deteriorated.
This relationship is not limited to piping inside the detached house or high-rise house, but also when connecting domestic wastewater discharged from the detached house or high-rise house to the sewer mains buried under the road, etc. The same problem also occurs at a plurality of connection points provided in a plurality of piping sections extending from the basement of the detached house or the high-rise house to the sewer main.

Furthermore, in the connection part of the said piping part using the conventional elbow pipe, the said elbow pipe part and the straight pipe part joined to it are only just fitted together, and it has flexibility. Because it is a structure that does not exist, its coupling strength is low, and when large vibrations such as earthquakes are applied, the fitting part of both is destroyed or separated from each other, and in some cases it is necessary There is a danger that gas or liquid fluid leaks to the outside and another secondary disaster occurs.
Even with the above-described universal elbow fittings, the angle adjustment change is small, and the degree of overlap between the fitting portions of the joint including the spherical surface is small, so that vibration such as earthquakes cannot be sufficiently absorbed and The lack of performance has a problem that the tube section is destroyed.

As an example of a method for solving such a conventional problem, a technical idea for improving the structure of the above-described universal elbow pipe joint and solving the technical drawbacks has been proposed.
For example, in Japanese Patent Application Laid-Open No. 07-2651973 (Patent Document 1), a first straight pipe portion and a first spherical body connected to one end of the first straight pipe portion are provided. 1st connection structure part comprised by the fitting part, 2nd straight pipe part, and the outer peripheral surface of the said inner spherical body connected to one edge part of the said 2nd straight pipe part And the second connecting structure portion made of an outer spherical body, and the first and second ones resulting from the smooth joint of the inner spherical body and the outer spherical body. There is disclosed a universal joint having a structure in which the straight pipe portion can swing a slight angle with respect to the other straight pipe portion by a prescribed shape.

However, in Patent Document 1, the first straight pipe portion joined to the inner spherical body is inclined at an angle of only 30 degrees around an appropriate axis passing through the center point of the inner spherical body. However, in this configuration, a bend angle between at least two straight pipe portions to be connected is connected with a large degree of freedom. This is impossible, and can only be used as a part of the coupling joint.
However, the universal joint disclosed in Patent Document 1 is merely configured for the purpose of handling the exhaust of a gas flow such as an air conditioner. Therefore, like the liquid fluid universal joint handled by the present invention, It is hard and flexible, flexible and flexible, with both earthquake resistance and vibration control, and it is completely different from a universal joint that requires a structure that never causes water to stay inside. Because it is configured with the idea that it should be able to be bent and connected appropriately, including straight pipe parts adjacent to each other, which are lightweight and easy to bend, In other words, if the angle of the straight pipe part changes by as much as 30 degrees, that is sufficient, and it is completely different from the universal joint for liquid fluid of the present invention in terms of configuration, purpose, and effect, and Invention inferred from first patent document It is it is one that can not be located.

On the other hand, in JP2010-242880A (Patent Document 2), like the universal connection part of Patent Document 1, it is used for connecting a pipe for circulating gas, and its configuration is Although it is disclosed with respect to a universal joint having substantially the same configuration as the universal coupling portion of Patent Document 1, the feature of Patent Document 2 is to be connected to the universal coupling portion of Patent Document 1. For the purpose of further expanding the range of connection angles between two straight pipe parts, the shape of the edge of the opening part of the inner spherical body and the outer spherical body that are slidably fitted to each other is specified. It is set to be the shape of.
However, as described above, even in the universal joint of Patent Document 2, as far as handling only gas, there is a significant difference in the configuration, purpose, and effect of the universal joint according to the present invention. In addition, if further added, the basic configuration of the universal joint of Patent Document 2 is that when the two spherical joint portions are fitted to each other, the axis of the maximum diameter portion of each spherical joint portion is aligned. Since it is based on a structure in which two corresponding locations are joined via a turning mechanism, each spherical joint can only turn in one direction about the axis of the maximum diameter portion as the central axis. Since only the configuration is disclosed and there is no suggestion regarding the other configurations, the universal joint for liquid fluid of the present invention should not be inferred from the Patent Document 2. , Handling gas The universal joint of the tube, it is not only revealed that it is quite sufficient in the structure of this level.

That is, the shape of the edge of the opening of the inner spherical body is the center point P of the inner spherical body and the straight line at a position eccentric from the central point P as shown in FIG. A straight line X connecting the central axis Z of the pipe part and a crossing line passing through the central point P of the inner spherical body and orthogonal to the plane formed by the spherical central point P and the central axis Z of the straight pipe part In the reference plane formed by Y, the end of the straight line X arranged in the reference plane crosses the edge of the opening of the inner spherical body, and the other end of the straight line X is the inner side. The distance from the reference plane is gradually increased as it reaches a part that intersects another part of the opening edge of the spherical body, while the opening edge of the outer spherical body As shown in FIG. 5 of Patent Document 2, the shape of the edge is formed into an opening shape along the above-described reference plane. By adopting such a configuration, the inclination angle of the opening edge of the inner spherical body is made larger than that of the opening edge of the conventional inner spherical body. Thus, it is described that the bending angle between the connecting straight pipe portions can be set with more degrees of freedom.

However, in the technical description disclosed in Patent Document 2, the setting condition of the reference plane is unknown, and therefore the existence position of the reference plane, the inclination angle with respect to the horizontal plane, etc. are not specified and cannot be implemented. It is only what showed the state of.
That is, in the above configuration, although it is defined as “a straight line X connecting the central point P of the inner spherical body and the central axis Z of the straight pipe portion”, the straight line X is the spherical central point. There can be innumerable in the plane formed by P and the central axis Z of the straight pipe portion. In the technical description as it is, it is impossible to specify the arrangement position and arrangement shape of the reference plane. is there.
However, in another specific example in Patent Document 2, the straight line X is within the plane formed by the spherical center point P and the central axis Z of the straight pipe portion, and the straight pipe from the center point. Since it is disclosed that the angle formed with the straight line W drawn perpendicularly to the central axis Z of the part can be set to 26 degrees or 34 degrees, this configuration is an essential constituent requirement of the invention. This guarantees the industrial implementation of the invention, but unless otherwise, the invention of Patent Document 2 only discloses an inoperable invention. It must be said that it is impossible to become an effective known example.

Furthermore, even if the present invention of Patent Document 2 is recognized only in the above-mentioned specific example, the shape of the edge of the opening of the outer spherical body is slightly inclined with respect to the horizontal plane. With respect to the reference plane formed, the height of the slanted wall, i.e., the auxiliary sliding portion, is not specified at all, and specific examples relating to this are disclosed. Therefore, even a person skilled in the art cannot manufacture a universally usable universal joint from the invention of Patent Document 2, in other words, Patent Document 2 includes the above-mentioned conventional technique. There is no technical suggestion that can create a new and inventive technical structure necessary to avoid the above problems.

In addition, the shape of the edge of the opening of the outer sphere in Patent Document 2 is formed by extending an oblique auxiliary member having an unclear range from the reference plane. At the same time, the shape of the opening edge of the inner spherical body is only arranged and formed in the same plane as the reference plane in the same manner as in the prior art. Since it is not recognized that the area, length, etc. of the portion where the opening and the edge of the opening of the inner spherical body are overlapped with each other are significantly larger than those of the prior art, the two connected There is also no fact that the bending angle formed between the two portions is larger than that of the prior art, and the guarantee is unclear.

Furthermore, in the said patent document 2, the overlap fitting site | part of the opening edge part of the said outer spherical body and the opening edge part of the said inner spherical body is set so large compared with a prior art. As long as there is not, the strength of the connecting portion of the universal joint remains small, and at the same time, it must be judged that there is a great risk of being easily separated and destroyed by vibrations such as earthquakes.
That is, neither of the Patent Documents 1 and 2 discloses any technical information necessary for solving the problems of the prior art, and there is no description suggesting it.
In addition, Utility Model Registration No. 3023017 (Patent Document 3) certainly shows a spherical universal joint that can be used for pipe connection of liquid fluid flow as in the present invention. To the point that the spheres have a structure in which the spheres are slidably fitted to each other and the packing is interposed between the spheres, this is consistent with a part of the configuration of the character rejoint of the present invention. In Reference 3, the ratio of the outer sphere covering the inner sphere is extremely large. Therefore, the range of the change angle between the straight pipe portions is extremely small and lacks practicality. At the same time, the outer sphere is divided by half. Since the structure is such that the inner sphere is inserted into the structure, and then the outer sphere is overlaid and fixed with screws, it is difficult to perform such operations on site, which greatly increases work efficiency. In addition to joints that only cause a drop, Since a configuration for staying fluid to only those of little practical use.

Japanese Patent Application Laid-Open No. 07-265773 JP 2010-242880 A Utility Model Registration No. 3023017

  Accordingly, the object of the present invention is to improve the above-mentioned deficiencies of the prior art and to realize the delicate required set angles required at various connection parts of piping that forms the passages of various liquid fluid flows made of liquid fluid. In such a case, at a construction site in a space that is narrow, dark, and extremely difficult to work, an operator can easily and finely adjust and set the bending angle between the pipes when performing the pipe connection operation. As a result, it is possible to perform the pipe installation work easily and accurately as designed even in a narrow space, so that the period and cost for the pipe installation work can be greatly reduced. At the same time, it provides a universal pipe joint for liquid fluid passages that has high joint strength in the structure of the universal joint itself, and is excellent in vibration control and earthquake resistance, and liquid fluid processing equipment using the same. That.

In order to achieve the above-described object, the present invention adopts a basic technical configuration as described below.
That is, a first specific aspect of the basic technical idea of the present invention is a universal joint used for a pipe joint for liquid fluid, and the universal joint includes the first straight pipe portion and the A first connection structure portion constituted by a first fitting portion constituted by a curved body forming a part of a spherical body connected to one end portion of the first straight pipe portion; A second connection composed of a straight pipe part and a second fitting part composed of a curved body forming a part of a spherical body connected to one end of the second straight pipe part Each of the first and second fitting parts has a spherical diameter larger than the diameter of the first and second straight pipe parts, and either one of the first and second fitting parts. Is fitted in the other, so that the sphere centers of the first and second fitting parts are aligned with each other so that they can slide and rotate in almost all directions. And the central axes of the first and second straight pipe portions are eccentrically arranged so as not to pass through the spherical center portions of the first and second fitting portions. In the side sectional view of the spherical body and the plane formed by the central axis of the first or second straight pipe part, one of the inner surfaces of the first or second straight pipe part is shown. And at least a part of the inner surface of the first or second fitting portion forms a continuous flat portion, and at least the edge peripheral portion of the first or second fitting portion is In the sectional side view seen in the first plane formed by the central part of the spherical body and the central axis of the first or second straight pipe part, the central part of the spherical body and the central line part of the straight pipe part are connected. A straight line including a straight line set at an angle within the range of 30 to 62 degrees with the center line portion. It is formed on the reference plane in a direction opposite to the side to which the straight pipe portion is connected than the reference plane inside the sphere formed on the second plane orthogonal to the first plane. It is formed in a part spaced from the reference plane by a length of 21 to 23% with respect to the maximum diameter part length of the sphere part, and further, a sphere in the first or second fitting part. The maximum sphere diameter of the body part is set so as to have a sphere diameter 1.5 to 1.7 times larger than the diameter of the first or second straight pipe part. This is a universal joint.
Furthermore, as a second specific aspect of the basic technical idea of the present invention, in the basic technical idea described above, the straight line connecting the center of the sphere and the center line of the straight pipe part is the straight line. The universal joint for liquid fluid piping joints is characterized in that the angle formed with the center line part of the pipe part is 38 to 68 degrees, more preferably 40 to 65 degrees.

  According to the universal joint for pipe joints used as the liquid fluid passage according to the present invention, as a result of adopting the basic technical configuration as described above, a plurality of pipe portions to be connected while having a simple configuration. That is, the connection adjustment work between the straight pipe parts is very easy, and the inner surface of the connection part between the straight pipe parts, in particular, the inner surface of the lower end part is not provided with any uneven obstacles. In addition, in the universal pipe joint for liquid fluid passage according to the present invention, it has a function of not inhibiting the flow of gas or liquid fluid. In the adjustment operation of the set angle required between both straight pipe parts in this, a very wide range of angle change is possible, and fine angle setting and angle adjustment operation in each part can be easily executed, However, each individual connected Since the diameter of the part can also be freely changed and adjusted, the required required slope setting operation of the pipe can be easily and quickly executed within the limited narrow pipe passage space. It is possible to greatly reduce the cost of piping installation work, and at the same time, it is not necessary to perform cleaning work inside the pipe using a high-pressure cleaning system that is required to be implemented at least once a year, especially for liquid fluid piping. Therefore, the cost required for maintenance and inspection work over a long period of time can be greatly reduced.

Furthermore, in the universal pipe joint for liquid fluid passages according to the present invention, the combination of the above-described essential constituents allows the straight pipe portion to be rotated and turned substantially in all directions, Since the area of the overlapping region between the spheres of the first and second fitting parts is designed to be large, it exhibits high strength against vibrations and external shocks, and vibrations It also has a function to absorb shocks, so it shows great durability against shocks such as earthquakes and explosions, so it is possible to obtain a flexible pipe joint for liquid fluid passages with high earthquake resistance. It is possible to greatly contribute to the conservation effect of the period.
In addition, by using at least two of the universal pipe joints for liquid fluid passages according to the present invention in one line, a free swinging function between the straight pipe portions of the universal joint is exhibited, and a more earthquake-resistant effect is achieved. It has the effect of being able to exhibit.

FIG. 1 is a longitudinal sectional view showing the configuration of a specific example of the universal pipe joint 100 for a liquid fluid passage according to the present invention. FIG. 2 is a longitudinal sectional view and a perspective view showing the configuration of a specific example of the first connection structure portion including the first fitting portion constituting the universal pipe joint for liquid fluid passage 100 according to the present invention. FIG. 3 is a longitudinal sectional view and a perspective view showing the configuration of a specific example of the second connection structure portion including the second fitting portion constituting the universal pipe joint for liquid fluid passage 100 according to the present invention. 4 is a perspective view showing a configuration example of the universal pipe joint for a liquid fluid passage of the present invention shown in FIG. FIG. 5 is a cross-sectional view showing a specific example of a method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage according to the present invention. It is. 6 (A), 6 (B), 6 (C) and 6 (D) are diagrams for explaining the swivel movement range of the straight pipe portion 5 with respect to the straight pipe portion 1 in the present invention. is there. FIG. 7 is a cross-sectional view showing another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage according to the present invention. FIG. FIG. 8 shows still another specific example of the method of adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage in the present invention. It is sectional drawing. FIG. 9 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is. FIG. 10 is a cross-sectional view showing another specific example of a method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage according to the present invention. FIG. FIG. 11 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is sectional drawing. FIG. 12 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe part and the second straight pipe part of the universal pipe joint for liquid fluid passage in the present invention. It is. FIG. 13 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is sectional drawing. FIG. 14 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe part and the second straight pipe part of the universal pipe joint for liquid fluid passage in the present invention. It is. FIG. 15 is a perspective view illustrating a configuration of an example of a stopper directed to the second straight pipe portion 5. FIG. 16 is a diagram for explaining an example of conventional piping installation work. FIG. 17 is a diagram for explaining another example of conventional piping installation work. FIG. 18 is a diagram for explaining an example of an earthquake-resistant piping structure in piping installation work using the universal pipe joint for liquid fluid passage according to the present invention. FIG. 19 is a diagram for explaining another example of the earthquake-resistant piping structure in piping installation work using the universal pipe joint for liquid fluid passage according to the present invention. FIG. 20 is a diagram for explaining another example of the earthquake-resistant piping structure in piping installation work using the universal pipe joint for liquid fluid passage according to the present invention. FIG. 21 is a diagram illustrating still another example of the earthquake-resistant piping structure in the piping installation work using the universal pipe joint for liquid fluid passage according to the present invention. FIG. 22 is a cross-sectional view for explaining the structure of the packing member in the universal pipe joint for liquid fluid passage according to the present invention. FIG. 23A is a diagram illustrating a configuration of a specific example of a liquid fluid processing apparatus using a universal pipe joint for a liquid fluid passage. FIG. 23B is a diagram illustrating a configuration of another specific example of the liquid fluid processing apparatus using the universal pipe joint for the liquid fluid passage. FIG. 24 is a cross-sectional view showing another specific example of a method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal fluid pipe universal pipe joint according to the present invention. FIG. FIG. 25 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage in the present invention. It is sectional drawing. FIG. 26 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is. FIG. 27 is a cross-sectional view showing another specific example of a method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the universal pipe joint for liquid fluid passage according to the present invention. FIG. FIG. 28 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is sectional drawing. FIG. 29 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is. FIG. 30 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is sectional drawing. FIG. 31 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is. FIG. 32 is a cross-sectional view showing another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. FIG. FIG. 33 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is sectional drawing. FIG. 34 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe part and the second straight pipe part of the universal pipe joint for liquid fluid passage in the present invention. It is. FIG. 35 is a cross-sectional view showing another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. FIG. FIG. 36 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint in the present invention. It is sectional drawing. FIG. 37 is a cross-sectional view showing different specific examples of the adjustment and setting method of the refraction angle between the first straight pipe part and the second straight pipe part of the universal pipe joint for liquid fluid passage according to the present invention. It is. FIG. 38 shows still another specific example of the method for adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is sectional drawing. FIG. 39 shows still another specific example of the method of adjusting and setting the refraction angle between the first straight pipe portion and the second straight pipe portion of the liquid fluid passage universal pipe joint according to the present invention. It is sectional drawing.

Hereinafter, the configuration of a specific example of the universal pipe joint for a liquid fluid passage according to the present invention will be described in detail with reference to the drawings.
That is, FIG. 1 is a diagram showing a specific example of the basic structure of the universal pipe joint 100 for liquid fluid passage as a first specific aspect of the basic technical idea in the present invention, In the figure, it is a universal joint 100 used for a pipe joint portion, and the universal joint is a spherical body connected to a first straight pipe portion 1 and one end of the first straight pipe portion 1. A first connection structure portion 4 constituted by a first fitting portion 3 constituted by a curved body 2 forming a part, a second straight pipe portion 5 and the second straight pipe portion 5. A second connection structure portion 8 constituted by a second fitting portion 7 constituted by a curved body 6 forming a part of a spherical body connected to one end portion, and The first and second fitting portions 3 and 7 both have spherical diameters R1 and R2 larger than the diameters of the first and second straight pipe portions 1 and 5, and either one of them. Is fitted in the other, so that the spherical center portions P of the first and second fitting portions 3 and 7 coincide with each other so that they can slide and rotate in all directions. The central axes Z1 and Z2 of the first and second straight pipe portions 1 and 5 have a configuration in which they are fitted and arranged, and the first and second fitting portions 3 and 7 A plane S1 that is arranged eccentrically so as not to pass through the spherical center P, and is formed by the spherical center P and the central axis Z1 or Z2 of the first or second straight pipe portion 1 or 5. In the sectional side view, a part 9, 10 of the inner surface of the first or second straight pipe part 1 or 5 and a part of the inner surface 11 of the first or second fitting part 3, 7 are shown. Forms a continuous flat surface portion, but at least the edge peripheral portions 12 and 13 of the first or second fitting portions 3 and 7. In the cross-sectional side view taken along the first plane S1 formed by the sphere center portion P and the central axes Z1 and Z2 of the first or second straight pipe portions 1 and 5, the sphere center portion P and the straight portion The first straight line W including the straight line W connecting the center line parts Z1 and Z2 of the pipe parts 1 and 5 and the straight line W0 set to an angle F within the range of 30 to 62 degrees with the center line part Z1 or Z2. The reference in the direction V opposite to the side to which the straight pipe portion 1 or 2 is connected than the reference plane T inside the sphere formed on the second plane S2 orthogonal to the plane S1. A length L of 21 to 23% with respect to the maximum diameter portion length R1 or R2 of the plane T is formed in a part separated from the reference plane T, and the first or second fitting portion 3 is further formed. , 7 have the maximum spherical diameter R1, R2 of the spherical body portion of the first or second straight pipe portion. Diameter X1, X2 1.5 to liquid fluid piping joint for a universal joint 100 which is characterized in that is set so as to have 1.7 times the sphere diameter is shown than.

  Since the universal pipe joint for liquid fluid passage 100 according to the present invention employs the basic technical configuration as described above, the first and second curved fitting portions 3 and 7 are mutually connected. The area of the overlapping portion is maximized, and the reference surface is firmly and stably slid and rotated with respect to each other, and the center of the straight pipe 1 of the reference surface T in the curved fitting portion By limiting the inclination angle F with respect to the axis Z1 within the specific range described above, it is provided in the other second fitting portion 7 with respect to one fitting portion 3 when viewed in the first plane S1. A straight pipe provided in the second fitting portion 7 and having a swing angle range M around the fitting portion center point P of the straight pipe portion 5 larger than that of the conventional universal joint. The part 5 passes through the fitting part center point P, and the axis P2 parallel to the axis Z2 of the straight pipe part 5 is the center. As shown by the symbol N, since it is possible to swivel 360 degrees which will result in a substantially pipe connection angle settings in all directions it is realized.

In the present invention, “substantially omnidirectional” is not omnidirectional in a complete sense, but is a very flexible and relatively arbitrary range of swivel / bend angles within the range required for the pipe connection work. This means that the refraction angle can be easily selected and set.
In the universal pipe joint for liquid fluid passage 100 according to the present invention, the object of use may be an appropriate gas or an appropriate liquid fluid.
In addition, the material constituting the liquid fluid passage universal pipe joint 100 in the present invention is not particularly specified, but for example, metal, various commonly used synthetic resins, glass fibers, or the like. It is desirable to be composed of FRP resin, ceramics or the like with a reinforcing material containing carbon fiber or the like.

Furthermore, the diameter (inner diameter) X1 of the straight pipe portion 1 provided in the first connection structure portion 4 and the diameter (inner diameter) of the straight pipe portion 5 provided in the second connection structure portion 8 in the present invention. ) X2 may be the same as or different from each other. In the present invention, straight pipe portions having different diameters can be used in any combination.
However, the first fitting portion 3 is used on the downstream side with respect to the flow direction of the used liquid fluid, and the second fitting portion 8 is on the upstream side with respect to the flow direction of the used liquid fluid. When the first fitting portion 3 is used, the diameter (inner diameter) X1 of the straight pipe portion 1 of the first fitting portion 3 is the straight pipe portion (upstream straight pipe portion) 5 of the second fitting portion 8. It is desirable that the conditions be larger than the diameter (inner diameter) X2.

  By the way, the inventor of the present application is also different from simple gas piping that handles inflow and outflow of gas in air conditioning equipment such as an air conditioner, and has excellent strength and elongation, rigidity, and flexibility. We have been developing a universal joint that has a high function that shows seismic control and seismic resistance even though it has a high degree of turning performance. In the process, we have conducted numerous tests and experiments. As a result, universal joints for liquid fluid pipe joints that completely satisfy the above-mentioned characteristics that have never existed in the world by specifying specific design conditions, that is, specific component requirements. The inventor of the present application has recently filed a patent application because the knowledge that it is possible to manufacture the product has been obtained. (Japanese Patent Application No. 2014-176661, patent application dated August 29, 2014)

In the patent application, the inventor has intensively studied the universal pipe joint for a liquid fluid passage that can exhibit the above-described preferable characteristics almost completely. With respect to the maximum diameter part length of the spherical body part formed on the reference plane in the direction opposite to the side where the straight pipe part is connected with respect to the reference plane inside the spherical body. The maximum spherical diameter of the spherical body portion in the first or second fitting portion is the first or second, and is formed in a portion separated from the reference plane by a length of 20%. It is set to have a sphere diameter 1.2 to 2.0 times larger than the diameter of the second straight pipe part, and the straight line connecting the spherical body center part and the central axis of the straight pipe part The angle formed with the central axis of the straight pipe is set to 38 to 52 degrees. " The fact that to obtain a knowledge that it is desirable to realize the technical idea mentioned, in which a patent application identified above technical configuration.
However, as a result of further diligent examination, the present inventor is equivalent to the invention of the prior application, even in the liquid fluid pipe joint universal joint including the constituent requirements different from the constituent requirements of the above-mentioned prior application. Since it has been found that there is a universal joint for liquid fluid piping joints that exhibits excellent performance comparable to that, the universal joint for liquid fluid piping joints including the new technical components is newly applied The application will be filed.

Next, each structure of the said 1st connection structure part 4 and the 2nd connection structure part 8 which are used for the said universal pipe joint 100 for liquid fluid paths which concerns on this invention is demonstrated more concretely.
By the way, in order to solve the various problems in the above-described conventional pipe joints, the present invention has been intensively studied and repeated a number of experiments to obtain a universal joint necessary for achieving the object of the present invention. We pursued the composition requirements that should be composed.
That is, according to the present invention, in order to pursue a desirable configuration of the universal joint, a large number of changeable elements in the universal joint, for example, the ratio of the diameter between the first and second straight pipe portions are various. The variety of offset lengths between the central axes of the first and second straight pipe portions and the spherical center point, and the upstream spherical portion of the internal opening space of the downstream straight pipe portion. While taking into account many factors such as the ratio of closing the peripheral edge of the end, the variety of required turning angles, the operability of the universal joint itself or the durability including vibration control or earthquake resistance, As a result of creating and examining a large number of model devices, the angle F formed by the reference plane T inside the sphere and the center line Z1 or Z2 of the straight pipe portion 1 or 5 and the end peripheral portions 12 and 13 are The distance L away from the reference plane T or the length of the maximum diameter inside the sphere It has been found that a substantially ideal universal joint can be obtained by limiting one or more ratios of R1 or R2 to the diameter X1 or X2 of the pipe portion 1 or 5 within a desired value range. It is.

2A is a side view for explaining the configuration of the first connection structure 4 according to the present invention, and FIG. 2B is a perspective view thereof.
That is, in the first connection structure portion 4 according to the present invention, the inclined state of the reference plane T is formed by the spherical body center portion P and the central axis Z1 of the first straight tube portion 1. In the side sectional view as seen in the first plane S1, it is displayed as a straight line W0 connecting the spherical center part P and the central line part Z1 of the straight pipe part 1 or 5, and the straight line WO is the central line part. Z1 and a structure set at a predetermined angle F are shown, and a line B-4 in FIG. 2B indicates that the first straight pipe portion 1 and the sphere portion 2 are mutually connected. It is a connection line which shows the site | part joined to.

By the way, the basic structure of the first connection structure portion 4 is as described above, and in particular, the maximum diameter R1 of the spherical curved portion in the first fitting portion 3 is the first straight pipe. It is desirable to set it to be larger than the diameter X1 of the portion within a range of 1.5 to 1.7 times, and it is particularly preferable that the maximum diameter R1 of the spherical curved portion is the same as that of the first straight pipe portion. It is set to be 1.6 times larger than the diameter X1.
That is, when the ratio R1 / X1 is 1.5 or less and the ratio R1 / X1 in the invention of the prior application is 1.2 to 1.5, However, when the ratio R1 / X1 is 1.2 or less, a practical effect cannot be obtained, and the maximum diameter R1 of the spherical curved portion and the first There is no substantial difference from the diameter X1 of the straight pipe portion, and as a result, the turning angle of the second straight pipe portion 5 is greatly restricted, and the free angle from 90 degrees becomes impossible. That is, the area of the region where the first fitting portion 3 and the second fitting portion 7 overlap each other is narrowed at the same time as the angle range becomes narrow, and accordingly, a packing 15 as described later is disposed. And the strength at the contact surface between the two types of spheres decreases, and Since the stability when turning drive is reduced, the strength or stability during use of the universal joint itself is disadvantage that impaired significantly.

On the other hand, when the ratio R1 / X1 is 1.7 or more, a substantial difference between the maximum diameter R1 of the spherical curved portion and the diameter X1 of the first straight pipe portion increases, and the spherical portion As a result, the turning angle of the second straight pipe portion 5 increases, but on the other hand, the attachment of the spherical body portion of the first fitting portion 3 and the first straight pipe portion. There is a problem that the joint area of the part is reduced, the strength is lowered, and the strength and durability of the universal joint are lowered.
Of course, when the ratio R1 / X1 specified in the invention of the prior application is up to 2.0, this indicates a moderately deteriorated state as compared with the case of the invention of the prior application.
Therefore, there is a drawback that it is necessary to install a stopper.
Furthermore, when it is desired to increase the diameter X1 of the first straight pipe portion under such conditions, the diameter of the spherical portion of the first fitting portion 3 becomes extremely large. Since the size of the device itself increases, the manufacturing cost increases, and the use area, that is, the space where the pipe can be installed is not large. ing.

In the present invention, as described above, as a result of intensive studies using samples in which various combination conditions were individually changed, the sample having the ratio R1 / X1 of 1.6 showed the most preferable characteristics. The optimum value of R1 / X1 was determined to be 1.6.
Therefore, in the present invention, the ratio R1 / X1 is preferably 1.5 to 1.7, and more preferably 1.6.
On the other hand, the specific configuration of the second connection structure 8 used in the present invention is as shown in the side view and perspective view of FIGS. 3 (A) and 3 (B). The basic configuration is substantially the same as that of the first connection structure 4 shown in FIG. 2, and the ratio R2 / X2 is preferably 1.5 to 1.7. Particularly desirable is 1.6.
That is, when the characteristic value in the present invention is 1.5 to 1.7 times, the maximum angle and the rotation angle can be freely and sufficiently large, and even in the overlapping portion. Since the wrap portion is sufficiently formed, the universal joint is excellent in strength.

Specifically, in the second connection structure portion 8 according to the present invention, the reference plane T is similar to the above in that the spherical center portion P and the second straight pipe portion 5 are similar to each other. In the side cross-sectional view of the first plane S1 formed by the central axis Z2, a straight line W0 connecting the spherical body central portion P and the central line portion Z2 of the straight pipe portion 5 is connected to the central line portion Z2 and a predetermined amount. The structure set to the angle F is shown, and the line A-2 in FIG. 3 (B) indicates that the second straight pipe portion 5 and the spherical portion 6 are joined to each other. It is a connection line which shows the site | part which is.
However, the outer diameter of the spherical portion 6 of the second connection structure 8 in FIG. 3 is slightly smaller than the inner diameter of the spherical portion 6 of the first connection structure 4 in FIG. It is desirable to set it to a small length.

Further, in each of the first and second connection structure portions 4 and 8, at least the portions where the straight pipe portions 1 and 5 are joined to the connection structure portions 4 and 8, respectively, The center part P of each of the spherical body parts 2 and 6 of each of the first and second connection structure parts 4 and 8 and the center axis lines Z1 and Z2 of the straight pipe parts 1 and 5 are in an offset state. In addition, it is desirable that at least a part of each straight pipe part 1, 5 is connected so as to smoothly form a continuous surface with a part of the outer surface curved portion of the sphere part 2, 6.
FIG. 4 is a perspective view when the spherical joints 2 and 6 of the first fitting portion 3 and the second fitting portion 8 described above according to the present invention are fitted to each other to complete a universal joint. The figure is shown.

Here, in the present invention, the ratio R1 / X1 between the maximum diameter R1 of the spherical curved portion 2 in the first connection structure portion 4 and the diameter X1 in the first straight pipe portion is set to 1. Of the first straight pipe portion when the first straight pipe portion is assumed to be installed on the downstream side in the case where the range is set to a range of .5 to 1.7 and in other conditions. Table 1 shows the installation values of the applicable range of the diameter X1, the maximum diameter R1 of the spherical curved portion, and the diameter X2 of the second straight pipe portion in the second connection structure portion 8.

According to the setting condition in the present invention, for example, a linear distance (length) L from the reference plane T to be described later to the end peripheral portion 12 or 13 is set to the maximum diameter R1 or R2 of the spherical portion. When the inclination angle F of the reference plane T with respect to the central axis of the straight pipe portion is set to 45 degrees, the angle Q1 described later is 160 degrees to 187 degrees, and the angle Q2 86 to 110 degrees, the allowable range of each angle is 24 to 25 degrees, the total angle change range is 101 degrees, and the angle Q3 is 106 degrees, and has a substantially omnidirectional turning function. Was recognized.

Next, between the spherical bodies 2 and 6 in the first and second connection structures 4 and 8, which is cited as one of important factors as another technical configuration in the present invention. In other words, the number of mutually overlapping areas between the spherical bodies 2 and 6 ensures a stable swirlability of the universal joint itself and greatly affects durability and strength. It seems that the larger the size of the mutual contact surface, the better. However, on the other hand, there are restrictions on manufacturing cost and manufacturing, so it is impossible to increase it.
In the present invention, as a criterion for determining the number of overlapping areas between one curved outer surface of the spherical bodies 2 and 6 and the other curved inner surface, “the central part P of the spherical body and the straight pipe” A second straight line W connecting the center line parts Z1, Z2 of the parts 1, 5 and perpendicular to the first plane S1 including the straight line W0 set to the predetermined angle F with the center line part Z1 or Z2. Adopting a length L "that is spaced away from the reference plane T inside the sphere formed on the plane S2 in the direction V opposite to the side to which the straight pipe portion 1 or 2 is connected. It is a thing.
In practice, the length L should be measured along the curved surface of the sphere, but in the present invention, in order to simplify the measurement operation, as shown in FIG. The length is defined as the length from the reference plane T to the peripheral edge portion 12 or 13 in the side view seen in the first plane S1.

Next, the present inventor pursued a preferable settable range for the length L based on a number of experimental results as described above.
That is, as the length L is larger, the overlapping area increases, which is advantageous in terms of strength or operational stability. On the other hand, there are limitations and manufacturing costs in terms of technical and functional maintenance. If restrictions from the surface occur and the value is made too small, the structural surface will be weakened, so it is necessary to set an appropriate range.
That is, as the set position of the edge peripheral edge portion 12 described above, the distance L that is parallel to the reference plane T inside the sphere and is separated from the reference plane T inside the sphere is set to the maximum diameter length R1 of the sphere portion. On the other hand, for example, when it is set to 10% or less, the distance between the reference plane T inside the sphere and the peripheral edge portion 12 becomes too short, and the first fitting portion 3 and the second fitting portion are too short. In the spherical portion in the joint portion 7, the mutual overlap, that is, the area of the overlapping portion becomes extremely small. As a result, it is not possible to arrange the packing 15, and the mutual overlapping area is small. For this reason, the sliding operation between the two fitting portions becomes unstable, and at the same time, the bonding strength is weakened, and the ball of the fitting portion itself is broken or easily broken.

On the other hand, when the distance L that is parallel to the reference plane T inside the sphere and is separated from the reference plane T inside the sphere is set to 30% or more with respect to the maximum diameter portion length R1 of the sphere, Since the turning angle between the first and second straight pipe portions 1 and 5 is greatly limited, the degree of freedom during construction is greatly impaired, and the first fitting portion 3 and the first fitting portion 3 Since the overlapping portion of the spherical portion in the fitting portion 7 of 2, that is, the area of the overlapping portion is increased, the above-described problem of strength and instability during sliding are eliminated, but the manufacturing cost is reduced. As a result of the rise, the free angle becomes too small, and as a result, it is not possible to turn freely from 90 degrees, and the operability is extremely lowered.
In addition, when the length L is set to 30% or more, for example, as shown in FIG. 6C, one end peripheral portion 13 of the second straight pipe portion 5 is provided. As shown by the dotted line Y in the opening portion of the first straight pipe portion 1, and as a result, the flow of the flowing liquid fluid is greatly hindered, and the flow function inside the pipe is Since the situation which paralyzes generate | occur | produces, it is necessary to set the conditions which the said situation does not generate | occur | produce absolutely.

Based on such knowledge, the present inventor conducted various experiments in more detail, and as a result, in order to clear all such problems, the length L in the present invention is at least It is necessary to be at least 10 to 30% with respect to the maximum diameter portion length R1 of the sphere portion formed on the reference plane T, preferably 15 to 25%, more preferably 20%. It came to the conclusion that it is necessary to set.
The present inventor has disclosed the above technical idea in detail in the above-mentioned patent application (Japanese Patent Application No. 2014-176661).
That is, in the present invention, the enlarged spherical portion for providing the end peripheral portion 12 is provided at a portion exceeding the reference plane T (the portion having the maximum inner diameter portion in the sphere) as described above. It has been confirmed that the object of the present invention can be achieved more reliably by actively providing it.
That is, with respect to the technical constituent requirements of the present invention, when the characteristic value that is judged to be the most effective is 20%, the overlapping parts of both spherical bodies in some universal joints ( There are no gaps in the wrap portion or cracks during use, and there is no risk of water leakage or damage to the product.

On the other hand, in the case where the characteristic value is 20% or less, for example, the universal joint having a characteristic value of 15 to 19% is, of course, apparent from the description of the original specification of the present application. Although it is true that the above-described effects of the present invention are superior to those of the conventional examples described above, if the ideal universal joint is evaluated in further detail, the characteristic value is 20 Compared to the ones in the above, there are no gaps in the overlapping part (wrapped part) of both spherical parts in some universal joints, and there is no danger of water leakage during use. Although there is a possibility that the product will be damaged, the performance is reasonable.
However, when the characteristic value is 15% or less, the wrap portion is reduced, and it is impossible to sufficiently secure an overlapping state of about 20% in all directions, and it is not possible to sufficiently secure a portion where the packing material is disposed. There is a problem.

On the other hand, when the characteristic value is 21% or more, of course, as is apparent from the description of the specification of the previous patent application relating to the present application, for example, the universal joint having the characteristic value of 21 to 25% Although the function is somewhat lower than that of 20%, it is a fact that it is superior in terms of the function and effect in the present invention described above, compared to the conventional examples so far, and the fracture strength The pulling strength is increased, but the turning angle and the rotation angle are relatively small. Further, if the ideal universal joint is evaluated in mind, the fracture strength and the pulling strength are increased particularly at 26% or more. However, the turning angle and the rotation angle are considerably reduced, and not only the product value as a universal joint is greatly reduced, but also there is a problem that the universal joint cannot be manufactured due to the structure.
However, if the characteristic value is in the range of 21% to 23%, it can be obtained from experiments and the like that a sufficient ideal universal joint can still be obtained even when the characteristic value is 20%. Needless to say, it has a considerably high performance as compared with other characteristic value ranges.
Therefore, the range of the characteristic value in the present invention is specified as 21% to 23%.
That is, in the present invention, the enlarged spherical portion for providing the end peripheral portion 12 is provided at a portion exceeding the reference plane T (the portion having the maximum inner diameter portion in the sphere) as described above. It has been confirmed that the object of the present invention can be achieved more reliably by actively providing it.

In the present invention, the above configuration requirements have been described for the first connection structure 4, but the essential configuration requirements are similarly applied to the second connection structure 8. Of course, both the connection structures 4 and 8 have the same spherical structure as described above, so that the operational effects of the present invention can be reliably achieved.
Accordingly, the overlapping portion of the first and second fitting portions in the present invention is formed between the reference plane and the peripheral edge portion of the first or second fitting portion. The outer surface area is approximately twice as large.
The maximum diameter portion lengths R1 and R2 of the sphere portion in the present invention are substantially the same, but the maximum diameter portion length R2 of the sphere portion is the maximum diameter in the first connection structure 4. It is common to set the portion smaller than the portion R1 by, for example, about 0.3 to 1.0 mm by the thickness of the member.

Next, a preferable allowable setting value of the inclination angle F with respect to the central axis Z1 or Z2 of the straight pipe portion 1 of the reference plane T in the present invention was examined.
In other words, as described above, the reference plane T is the side of the spherical portion 2 or 6 on the side plane viewed from the plane S1 including the central portion P of the spherical portions 2 and 6 and the central axis Z1 or Z2 of the straight pipe portion 1. Formed on the second plane S2 including a straight line W that passes through the center P of the tube and is perpendicular to the plane S and intersects the central axis Z1 of the straight pipe section 1 with a predetermined angle F. The predetermined angle F is not particularly specified, but by appropriately changing the angle F, for example, as shown in FIG. 1, a plurality of arbitrary straight lines W0, W1, W2, etc. Individuals can be formed.
In the present invention, the inventor is able to set the turning allowable range between the straight pipe portions 1 and 5 to an optimum value by changing the predetermined angle F. In order to make a prediction and confirm the allowable range, a variety of model experiments were performed as described below.

By the way, as described above, the intersection angle F between the reference plane T and the central axes Z1 and Z2 of any one of the straight pipe portions 1 and 5 in the present invention cannot be uniquely determined. Yes, the internal diameter ratio between the first and second straight pipe portions 1 and 5 used, and the mutual relationship between the spherical bodies 2 and 6 in the first and second connection structure portions 4 and 8 The number of overlapping areas, the ratio of the diameter of the first or second straight pipe portion 1 or 5 and the maximum spherical diameter of the spherical body portion 2 or 6 in the first or second fitting portion, etc. Each required component can be changed within the desired range, and at the same time, many changes can be made depending on the respective coupling conditions. In addition to the combination conditions, the downstream straight pipe In consideration of the condition that the peripheral edge 13 of the end of the straight pipe portion on the upstream side does not enter the internal opening region in the portion. Say that needs to be there, in a complex relationship, there is a need to pursue the optimum conditions.
Therefore, as described above, the present inventor manufactured a large number of universal joint model samples in which the above-described constituent elements are changed and combined within the feasible range, and the characteristics exhibited by each of them, in particular, the swirlability and swivel As a result of inspecting a possible range, breaking strength, durability, etc., and analyzing a large amount of such test data, it is found that the gap between the spherical bodies 2 and 6 in the first and second connection structures 4 and 8 is as follows. The specific range includes the number of mutually overlapping areas, the ratio between the diameter of the straight pipe portion 1 or 5 and the maximum spherical diameter of the spherical body portion 2 or 6, the angle of intersection of the reference plane T with the straight pipe portion central axis, etc. It was learned that an ideal universal joint can be obtained by restricting to the inside.

Here, the present inventor is necessary to confirm the degree of bending and swiveling between the first and second straight pipe portions of each universal joint 100 and the allowable range thereof through the above-described many experiments. The following inspection standards were set as the basis for the analysis of the above experiments and their results.
That is, as shown in FIG. 6, the inventor sets one straight pipe portion in a fixed state, and measures how much and in which direction the other straight pipe portion rotates. The criteria were set as follows.

That is, as shown in FIG. 6A, in the side view seen in the plane S1, the central axis Z1 of the first straight pipe portion 1 and the central axis Z2 of the second straight pipe portion 5 When the set angle is set to 90 degrees, the normal turning angle Q1 that is the turning angle of the second straight pipe portion 5 around the center point P of the spherical body portion 2, and FIG. As shown in FIG. 4, the set angles of the central axis Z1 of the first straight pipe portion 1 and the central axis Z2 of the second straight pipe portion 5 are set in parallel to each other (that is, the angle between the two axis lines is set to 180). 6), the reverse turning angle Q2 that is the turning angle of the second straight pipe portion 5 around the center point P of the spherical body portion 2 is set at the same time. As shown in the front view of FIG. 6 and the side view of FIG. 6D, the center axis Z2 of the second straight pipe portion 5 within the set conditions shown in FIG. In the front view of the side view (FIG. 6D) viewed from the plane S2 orthogonal to the plane S1, for example, in a state of being inclined by 45 degrees with respect to the central axis Z1 of the tube portion 1. The left and right turning angle Q3 which is the turning angle of the second straight pipe portion 5 is set, and the settable ranges are individually measured.

Hereinafter, using the various data obtained by the various experiments described above, the first first connection structure portion 4 and the second connection portion 4 in the liquid fluid passage universal pipe joint 100 according to the present invention will be described. The connecting portion refraction angle formed by the straight pipe portions 1 and 5 individually connected to the respective fitting portions 3 and 7 is a wide range. An example of a principle that can be investigated and examined whether or not the structure can be easily adjusted and changed for each minute angle in almost all directions will be described in detail with reference to FIGS. .
That is, FIG. 5A shows the reference axis T of the universal pipe 100 for liquid fluid passage according to the present invention, the central axis Z1 of the first straight pipe portion 1 (inner diameter is 80φ). In the basic configuration in a state where the angle F is set to 45 degrees, the second straight fitting and the central axis Z1 of the first straight pipe portion 1 connected to the first fitting portion 3 The central axis Z2 of the second straight pipe portion 5 (inner diameter is 50φ) connected to the portion 7 is between the two straight lines so as to show a right angle in the side view seen in the first plane S1 described above. This shows a state where 1 and 5 are refracted.

On the other hand, FIG. 5B shows the first fluid fluid passage universal pipe joint 100 according to the present invention shown in FIG. 5A under the same conditions as in FIG. The central axis Z1 of the first straight pipe part 1 connected to the fitting part 3 and the central axis Z2 of the second straight pipe part 5 connected to the second fitting part 7 are described above. In the side view as viewed in the first plane S1, with respect to a reference line P2 provided through the center point P of the curved sphere and parallel to the center axis Z2 of the second straight pipe portion 5, The figure shows a state of turning about 15 degrees leftward about the center point P of the curved sphere in the drawing, that is, the normal turning angle Q1 is 15 degrees.

On the other hand, in FIG. 5, as seen from the side view seen in the first plane S1, the bending allowable angle of the second straight pipe part 5 with respect to the first straight pipe part 1 is at most 15 degrees. However, in the basic technical configuration in the present invention, the turning angle is set by combining the turning, turning, and sliding action between the first and second fitting portions 2, 7. Specifically, for example, as shown in FIG. 7 shown below, for example, as shown in FIG. 7 below, the second straight pipe part 5 is swiveled within the bending angle with respect to the first straight pipe part 1. The angle Q1 is 90 to 105 degrees, the reverse turning angle Q2 is 165 to 180 degrees, and can be arbitrarily changed between 90 degrees and 180 degrees, and a large degree of freedom can be obtained with respect to the bending angle. Is possible.
By the way, with regard to the structural requirement called the angle between the straight axis connecting the spherical body center and the straight axis of the straight pipe in the present invention, the determination is independent. Setting at is difficult, and is determined by the combination relationship with the above-described two components.

That is, when the angle F is set to be 30 degrees or less, the swivel angle range of the second straight pipe portion 5 relative to the first straight pipe portion 1 can be large, but on the contrary, the first and first Since the overlapping area (range) of the two spheres in the fitting portion 2 becomes small, for example, setting of the packing 15 becomes impossible, and at the same time, the mutual strength and stability between the fitting portions are stable. There is a disadvantage that sliding operation is impossible.
On the other hand, when the angle F is set to 62 degrees or more, the turning angle range of the second straight pipe portion 5 with respect to the first straight pipe portion 1 becomes extremely narrow, and the first joint as the universal joint There is a problem that it becomes impossible to set an arbitrary turning angle between the straight pipe portion 1 and the second straight pipe portion 5.

Therefore, in the present invention, it is desirable to set the angle F in the range of 30 degrees to 62 degrees. Judging from the results of numerous experiments by the inventors, the angle F is preferably 38 degrees to 52 degrees. In the range of degrees, it is particularly preferable that the knowledge that the angle F is set to 45 degrees is obtained.
However, as a result of further detailed and intensive studies by the inventor, the angle F is in the range of 38 to 68 degrees, more preferably in the range of 40 to 65 degrees. It is learned that it is possible to execute rotation and movement.
Therefore, the angle F in the present invention is desirably in the range of 38 to 68 degrees, more preferably 40 to 65 degrees.
The universal joint for liquid fluid pipe joints according to the present invention is constructed by combining the above-described new and highly technical technical requirements, and as a result, the required turning and / or at the construction site. It is a universal joint for liquid fluid piping joints of almost all directions that says that the first and second straight pipe parts can be set quickly and easily at a rotation angle. It is clear that the joint is a joint that has never existed in the past.

In other words, since the universal joint for a liquid fluid pipe joint according to the present invention is constructed by combining the above-described new and highly technical technical requirements, In the joint processing construction site where the fluid pipe ends should be joined together, from the positional relationship between the ends of the liquid fluid pipes for which the joint construction treatment arranged opposite to each other at the site is required, The required angle and direction, in other words, according to the set angle and the set direction required between the first and second straight pipe portions when effectively joining the ends of the liquid fluid pipes. Thus, the combination of moving, rotating, or turning the first and second straight pipe portions allows the setting angle and the setting direction to be freely and extremely easily set. It is what you have.
That is, the universal joint for liquid fluid piping joints according to the present invention can be used in such a way that it conforms to its form very freely and easily depending on the setting direction and setting angle required at the construction site. The arrangement state between pipe parts can be changed.

In the following, based on the result of the settable range in each of the above-mentioned essential components in the present invention, the central axis Z1 in the straight pipe portion 1 or 5 of the reference plane T in the present invention or Many experiments shown in Tables 2 to 11 and FIGS. 8 to 14 and FIGS. 24 to 39 described above, as well as the allowable range of the inclination angle F with respect to Z2. It examined based on the result.
That is, Table 2 shows that the setting angle F is set to 38 degrees, the diameter X1 of the first straight pipe portion 1 is changed from 50 mm to 600 mm, and the maximum diameter R1 of the sphere portion of the first fitting portion 3 is changed. Is changed from 80 mm to 960 mm, the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 20% with respect to the maximum sphere diameter R1 of the sphere, and the sphere The experimental results when the ratio R1 / X1 of the maximum diameter R1 to the diameter X1 of the straight pipe portion 1 is set to 1.6 are shown. According to the experimental results from Table 2, the second defined above is shown. The straight turning portion Q1 of the straight pipe portion 5 is 75 ° to 103 ° and the allowable turning angle is 28, the reverse turning angle Q2 is 150 ° to 178 ° and the allowable turning angle is 28. The angle Q3 is 37 degrees to 143 degrees and the allowable turning angle is 1. 6 degrees has been shown to result to say that was obtained.
FIG. 8 is a diagram showing how the second straight pipe portion 5 can pivot with respect to the first straight pipe portion 1 in the experiment.
From these results, even if the above-mentioned setting conditions are changed, it is considered that the turning performance does not have a great influence, but rather the setting angle F exerts a great functional influence.

Next, Table 3 sets the setting angle F to 45 degrees, changes the diameter X1 of the first straight pipe portion 1 from 50 mm to 600 mm, and increases the maximum diameter of the sphere portion of the first fitting portion 3 R1 is changed from 80 mm to 960 mm, the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 20% with respect to the maximum sphere diameter R1 of the sphere, and the sphere The experimental results when the ratio R1 / X1 of the maximum diameter R1 of the section to the diameter X1 of the straight pipe section 1 is set to 1.6 are shown. According to the experimental results of Table 3, the first defined above The forward turning angle Q1 of the straight pipe portion 2 is 83 to 110 degrees and the allowable turning angle is 28, the reverse turning angle Q2 is 159 to 187 degrees and the allowable turning angle is 28. The turning angle Q3 is 37 degrees to 143 degrees, and the allowable turning angle is 1. 6 degrees has been shown to result to say that was obtained.
FIG. 9 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the experiment.

On the other hand, in Table 4, the set angle F is set to 54 degrees, the diameter X1 of the first straight pipe portion 1 is changed from 50 mm to 600 mm, and the maximum diameter R1 of the sphere portion of the first fitting portion 3 is changed. Is changed from 80 mm to 960 mm, the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 20% with respect to the maximum sphere diameter R1 of the sphere, and the sphere The experimental results when the ratio R1 / X1 of the maximum diameter R1 to the diameter X1 of the straight pipe portion 1 is set to 1.6 are shown. According to the experimental results according to Table 4, the second defined above is shown. The normal turning angle Q1 of the straight pipe portion 5 is 90 to 118 degrees and the allowable turning angle is 28, the reverse turning angle Q2 is 165 to 193 degrees and the allowable turning angle is 28, and the left and right turning The angle Q3 is 37 degrees to 143 degrees and the allowable turning angle is 1. 6 degrees has been shown to result to say that was obtained.

FIG. 10 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the experiment.
Further, Table 5 sets the setting angle F to 38 degrees, changes the diameter X1 of the first straight pipe portion 1 from 50 mm to 600 mm, and sets the maximum diameter R1 of the sphere portion of the first fitting portion 3 to The distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 10% with respect to the maximum sphere diameter R1 of the sphere, The experimental result when ratio R1 / X1 with respect to the diameter X1 of the straight pipe part 1 of the maximum diameter R1 is set to 1.6 is shown. According to the experimental result according to Table 5, the second defined above is shown. The forward turning angle Q1 of the straight pipe portion 5 is 78 degrees to 102 degrees and the allowable turning angle is 24, the reverse turning angle Q2 is 168 degrees to 192 degrees, the allowable turning angle is 24, and the left and right turning angle Q3 is 37 to 143 degrees and the allowable turning angle is 10 The results say that degree was obtained is shown.
Moreover, FIG. 11 is a figure which shows how the said 2nd straight pipe part 5 can turn with respect to the said 1st straight pipe part 1 in the said experiment.
In addition, it turned out that it is necessary to provide a stopper in this experiment example.

On the other hand, in Table 6, the set angle F is set to 45 degrees, the diameter X1 of the first straight pipe portion 1 is changed from 50 mm to 600 mm, and the maximum diameter R1 of the sphere portion of the first fitting portion 3 is changed. Is changed from 80 mm to 960 mm, and the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 10% with respect to the maximum sphere diameter R1 of the sphere, and the sphere The experimental results when the ratio R1 / X1 of the maximum diameter R1 to the diameter X1 of the straight pipe portion 1 is set to 1.6 are shown. According to the experimental results from Table 6, the second defined above is shown. The forward turning angle Q1 of the straight pipe portion 5 is 72 to 108 degrees and the allowable turning angle is 36, the reverse turning angle Q2 is 161 to 197 degrees and the allowable turning angle is 36, and the left and right turning The angle Q3 is 37 degrees to 143 degrees and the allowable turning angle is 1. 6 degrees has been shown to result to say that was obtained.
FIG. 12 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the experiment.

Further, Table 7 shows that the setting angle F is set to 54 degrees, the diameter X1 of the first straight pipe portion 1 is changed from 50 mm to 600 mm, and the maximum diameter R1 of the sphere portion of the first fitting portion 3 is changed. Is changed from 80 mm to 960 mm, and the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 10% with respect to the maximum sphere diameter R1 of the sphere, and the sphere The experimental results when the ratio R1 / X1 of the maximum diameter R1 to the diameter X1 of the straight pipe portion 1 is set to 1.6 are shown. According to the experimental results according to Table 7, the second defined above is shown. The straight turning angle Q1 of the straight pipe portion 5 is 80 ° to 106 °, the allowable turning angle is 26, the reverse turning angle Q2 is 180 ° to 206 °, the allowable turning angle is 26, and the left and right turning The angle Q3 is 37 degrees to 143 degrees and the allowable turning angle is 1. 6 degrees has been shown to result to say that was obtained.
FIG. 13 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the experiment.

On the other hand, in Table 8, the set angle F is set to 45 degrees, the diameter X1 of the first straight pipe portion 1 is changed from 50 mm to 600 mm, and the maximum diameter R1 of the sphere portion of the first fitting portion 3 is changed. Is changed from 80 mm to 960 mm, and the distance L between the reference plane T inside the sphere and the edge peripheral edge 12 is set to 30% with respect to the maximum sphere diameter R1 of the sphere, and the sphere Shows the experimental result when the ratio R1 / X1 of the maximum diameter R1 to the diameter X1 of the straight pipe portion 1 is set to 1.6. According to the experimental result according to Table 8, the second defined above is shown. The straight turning portion Q1 of the straight pipe portion 5 is 80 to 98 degrees and the allowable turning angle is 18, the reverse turning angle Q2 is 171 to 189 degrees and the allowable turning angle is 18, and the left and right turning The angle Q3 is 25 degrees to 155 degrees and the allowable turning angle is 13 The results say that degree was obtained is shown.
However, in the above experiment, the distance L with respect to the edge peripheral edge portion 12 was set to 30% with respect to the maximum sphere diameter R1 of the sphere portion, but the swivel allowable range is slightly above the angles Q1 and Q2. It was found that this was a universal joint that could not be expected in many respects in terms of functionality and practicality.

On the other hand, in this experiment, as shown in FIG. 14, by setting the ratio R1 / X1 of the maximum diameter R1 of the sphere part to the diameter X1 of the straight pipe part 1 to 2.0, the allowable range is considerably expanded. However, since the size of the sphere is too large, problems arise in terms of strength and stability, and it cannot be considered a preferred example. It was.
It is desirable that the predetermined angle F in the present invention is set in the range of 30 degrees to 62 degrees by comprehensively judging the above-mentioned many experimental results and various considerations on them. The angle F is set to 38 degrees to 52 degrees, and particularly preferably set to 45 degrees, and the straight line W0 formed thereby is used as the basis of the reference plane T.

Based on the above experimental results and various considerations, in the present invention, the permissible range regarding the above-described essential constituent elements in the present invention has been confirmed, that is, the maximum diameter R1 of the spherical curved portion. R1 / X1 of the diameter X1 of the first straight pipe portion is 1.2 to 2,0, and the angle formed by the reference plane T and the central axis Z1 or Z2 of the straight pipe portion 1 or 2 F is 30 degrees to 62 degrees, and the length L at which the end peripheral edge 12 or 13 in the first or second fitting portion is spaced from the reference plane T is as follows: The maximum diameter portion length R1 or R2 of the reference plane T is set to 10 to 30%.

Hereinafter, as described above, in the present invention, the ratio R1 / X1 of the maximum diameter R1 of the spherical curved portion and the diameter X1 of the first straight pipe portion is 1.5 to 1.7. In order to confirm that a more optimal universal joint for liquid fluid piping joints can be obtained by combining the ratio R1 / X1 with other requirements. Many more experiments were repeated and the conditions were established, and the process will be described in detail with reference to Tables 9 to 11 and FIGS.
That is, Table 9 shows experimental results when the ratio R1 / X1 in the present invention is set to 1.5. In Table 9, the reference plane T inside the sphere is further shown. The distance L1 (mm) between the peripheral edge 12 and the edge 12 is changed between 18% and 25% with respect to the maximum sphere diameter R1 of the sphere, and at the same time, the set angle F is set in each set condition. It shows the result of measuring the rotation angles of the three maximum permissible ranges, which are set in consideration of the angle that can be taken in the maximum range.
That is, according to the above-described experiment, in the case where the distance L1 (mm) is set to 18%, the maximum allowable angle range of the set angle F is 41 degrees to 70 degrees. Taking the following angle range was physically difficult.

In the experiment described above, in the case where the distance L1 (mm) is set to 18%, the maximum allowable angle range of the set angle F is 41 degrees to 71 degrees, and more or less. Taking the angle range was a physically difficult situation.
That is, according to the experimental results shown in Table 9, when the angle range defined above is 41 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 82 degrees to 110 degrees and the allowable turning angle. Is 28 degrees, the reverse turning angle Q2 is 152 to 180 degrees and the allowable turning angle is 28 degrees, and the left and right turning angle Q3 is 82 to 180 degrees and the allowable turning angle is 98 degrees. The result is said to have been done.

When the angle range defined above is 70 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 110 to 138 degrees, the allowable turning angle is 28 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 208 degrees and the allowable turning angle is 28 degrees, and the left and right turning angle Q3 is 110 degrees to 208 degrees and the allowable turning angle is 98 degrees. Yes.
However, even in the above experiment, it was found that there was a problem in strength because the range of the lap portion at the peripheral edge portion 12 was small.
Also, according to the above-described experiment, in the case where the distance L1 (mm) is set to 21%, the maximum allowable angle range of the set angle F is 44 degrees to 65 degrees, more or more Taking the following angle range was physically difficult.
According to other experimental results according to Table 9, when the angle range defined above is 44 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 87 degrees to 109 degrees. The allowable turning angle is 22 degrees, the reverse turning angle Q2 is 157 to 180 degrees, the allowable turning angle is 23 degrees, and the left and right turning angle Q3 is 87 degrees to 157 degrees, and the allowable turning angle is 93. The result that the degree was obtained is shown.

On the other hand, when the angle range defined above is 65 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 109 degrees to 129 degrees, the allowable turning angle is 20 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 201 degrees and the allowable turning angle is 21 degrees, and the left and right turning angle Q3 is 109 degrees to 201 degrees and the allowable turning angle is 92 degrees. Yes.
From these experimental results, it was found that in both of the above experiments, the above-described universal joint for liquid fluid connection piping had substantially ideal functions and characteristics.
FIG. 25 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.
Further, according to the above-described experiment, in the case where the distance L1 (mm) is set to 22%, the maximum allowable angle range of the set angle F is 46 degrees to 64 degrees, and more or more Taking the following angle range was physically difficult.

According to other experimental results according to Table 9, when the angle range defined above is 46 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 93 degrees to 110 degrees. The allowable turning angle is 17 degrees, the reverse turning angle Q2 is 162 degrees to 180 degrees, the allowable turning angle is 18 degrees, and the left and right turning angle Q3 is 93 degrees to 180 degrees, and the allowable turning angle is 87 degrees. The result that the degree was obtained is shown.
On the other hand, when the angle range defined above is 64 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 110 degrees to 127 degrees, the allowable turning angle is 17 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 197 degrees and the allowable turning angle is 17 degrees, and the left and right turning angle Q3 is 110 degrees to 197 degrees and the allowable turning angle is 87 degrees. Yes.
From these experimental results, in the specific example in which the predetermined angle F is set to 46 degrees, there is a slight disadvantage that the predetermined angle F cannot be changed from 90 degrees, but a specific example in which the predetermined angle F is set to 64 degrees. However, it has been found that the above-described universal joint for liquid fluid connection piping has substantially ideal functions and characteristics.
FIG. 26 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Next, in the above experiment, when the distance L1 (mm) is set to 23%, the maximum allowable angle range of the set angle F is 46 degrees to 64 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results in Table 9, when the angle range defined above is 46 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 95 degrees to 110 degrees and the allowable turning angle. Is 15 degrees, the reverse turning angle Q2 is 164 to 180 degrees and the allowable turning angle is 16 degrees, and the left and right turning angle Q3 is 95 to 180 degrees and the allowable turning angle is 85 degrees. The result is said to have been done.
When the angle range defined above is 64 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 110 degrees to 127 degrees, the allowable turning angle is 17 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 198 degrees and the allowable turning angle is 18 degrees, and the left and right turning angle Q3 is 110 degrees to 198 degrees and the allowable turning angle is 88 degrees. Yes.
From these experimental results, in the specific example in which the predetermined angle F is set to 46 degrees, there is a slight disadvantage that the predetermined angle F cannot be changed from 90 degrees, but a specific example in which the predetermined angle F is set to 64 degrees. However, it has been found that the above-described universal joint for liquid fluid connection piping has substantially ideal functions and characteristics.

FIG. 27 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.
Next, in the above experiment, in the case where the distance L1 (mm) is set to 25%, the set angle F has a maximum allowable angle range of 51 degrees to 61 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results shown in Table 9, when the angle range defined above is 51 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 100 degrees to 110 degrees and the allowable turning angle. Is 10 degrees, the reverse turning angle Q2 is 169 to 179 degrees and the allowable turning angle is 10 degrees, and the left and right turning angle Q3 is 100 to 179 degrees and the allowable turning angle is 79 degrees. The result is said to have been done.
When the angle range defined above is 61 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 110 to 120 degrees, the allowable turning angle is 10 degrees, and the reverse The result shows that the turning angle Q2 is 179 to 189 degrees and the allowable turning angle is 10 degrees, and the left and right turning angle Q3 is 110 to 189 degrees and the allowable turning angle is 79 degrees. Yes.
However, in the two specific examples described above, both of these products were extremely small in the range of rotational movement and showed little practicality.

FIG. 28 is a diagram showing how the second straight pipe portion 5 can pivot with respect to the first straight pipe portion 1 in the two experiments.
Next, Table 10 shows the experimental results when the ratio R1 / X1 is set to 1.6 in the present invention. In Table 10, the reference inside the sphere is further shown. While changing the distance L1 (mm) between the plane T and the peripheral edge portion 12 between 18% and 25% with respect to the maximum sphere diameter R1 of the sphere, the set angle F is set to each setting condition. Fig. 5 shows the result of measuring the rotation angles of the three maximum allowable ranges, which are set in consideration of the angle that can be taken in the maximum range.
That is, according to the above-described experiment, in the case where the distance L1 (mm) is set to 18%, the maximum allowable angle range of the set angle F is 32 degrees to 70 degrees. Taking the following angle range was physically difficult.

That is, according to the experimental results shown in Table 10, if the angle range defined above is 32 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 71 degrees to 104 degrees and the allowable turning angle. Is 33 degrees, the reverse turning angle Q2 is 147 to 180 degrees and the allowable turning angle is 33 degrees, and the left and right turning angle Q3 is 71 to 180 degrees and the allowable turning angle is 109 degrees. The result is said to have been done.
When the angle range defined above is 70 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 104 degrees to 138 degrees, the allowable turning angle is 34 degrees, and the reverse The results show that the turning angle Q2 is 180 degrees to 213 degrees and the allowable turning angle is 33 degrees, and the left and right turning angles Q3 are 110 degrees to 208 degrees and the allowable turning angle is 98 degrees. Yes.
However, in any of the above-described experiments, it has been found that there is a problem in strength because the range of the lap portion at the peripheral edge portion 12 is small.
FIG. 29 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Further, according to the above-described experiment, the distance L1 (mm) set to 20%, that is, corresponds to the configuration of the invention of the patent application corresponding to the prior application of the present invention, and the set angle F is The maximum allowable angle range is 39 degrees to 67 degrees, and it was physically difficult to take an angle range of more or less.
According to other experimental results according to Table 10, when the angle range defined above is 39 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 87 degrees to 105 degrees. The allowable turning angle is 27 degrees, the reverse turning angle Q2 is 152 to 180 degrees and the allowable turning angle is 28 degrees, and the left and right turning angle Q3 is 78 to 180 degrees and the allowable turning angle is 102. The result that the degree was obtained is shown.
On the other hand, when the angle range defined above is 67 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 105 to 132 degrees, the allowable turning angle is 27 degrees, and the reverse The result shows that the turning angle Q2 is 180 to 207 degrees and the allowable turning angle is 27 degrees, and the left and right turning angle Q3 is 105 to 207 degrees and the allowable turning angle is 102 degrees. Yes.
From these experimental results, it was found that in both of the above experiments, the above-described universal joint for liquid fluid connection piping had substantially ideal functions and characteristics.
FIG. 30 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

On the other hand, according to the experiment described above, in the case where the distance L1 (mm) is set to 21%, the set angle F has a maximum allowable angle range of 40 degrees to 65 degrees. Taking the following angle range was physically difficult.
According to another experimental result according to Table 10, when the angle range defined above is 40 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 80 degrees to 105 degrees. The allowable turning angle is 26 degrees, the reverse turning angle Q2 is 154 to 179 degrees, the allowable turning angle is 26 degrees, and the left and right turning angle Q3 is 87 degrees to 179 degrees, and the allowable turning angle is 99. The result that the degree was obtained is shown.
On the other hand, when the angle range defined above is 65 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 105 to 131 degrees, the allowable turning angle is 26 degrees, and the reverse The results show that the turning angle Q2 is 179 to 205 degrees and the allowable turning angle is 26 degrees, and the left and right turning angle Q3 is 105 to 205 degrees and the allowable turning angle is 100 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.
FIG. 31 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Further, according to the above-described experiment, in the case where the distance L1 (mm) is set to 22%, the maximum allowable angle range of the set angle F is 41 degrees to 64 degrees, and more or more Taking the following angle range was physically difficult.
According to other experimental results according to Table 10, when the angle range defined above is 41 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 82 degrees to 105 degrees. The allowable turning angle is 23 degrees, the reverse turning angle Q2 is 155 to 180 degrees, the allowable turning angle is 25 degrees, and the left and right turning angle Q3 is 82 degrees to 180 degrees and the allowable turning angle is 98. The result that the degree was obtained is shown.
On the other hand, when the angle range defined above is 64 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 105 to 128 degrees, the allowable turning angle is 23 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 203 degrees and the allowable turning angle is 23 degrees, and the left and right turning angle Q3 is 105 degrees to 203 degrees and the allowable turning angle is 98 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.
FIG. 32 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Next, in the above experiment, in the case where the distance L1 (mm) is set to 23%, the maximum allowable angle range of the set angle F is 42 degrees to 62 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results shown in Table 9, when the angle range defined above is 42 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 84 degrees to 105 degrees and the allowable turning angle. Is 21 degrees, the reverse turning angle Q2 is 160 to 179 degrees and the allowable turning angle is 19 degrees, and the left and right turning angle Q3 is 84 to 179 degrees and the allowable turning angle is 95 degrees. The result is said to have been done.

Further, when the angle range defined above is 62 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 105 to 125 degrees, the allowable turning angle is 20 degrees, and the reverse The result shows that the turning angle Q2 is 179 to 201 degrees and the allowable turning angle is 22 degrees, and the left and right turning angle Q3 is 110 to 198 degrees and the allowable turning angle is 96 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.
FIG. 33 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Next, in the above experiment, when the distance L1 (mm) is set to 25%, the set angle F is a maximum allowable angle range of 45 degrees to 60 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results shown in Table 9, when the angle range defined above is 45 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 89 degrees to 104 degrees and the allowable turning angle. Is 15 degrees, the reverse turning angle Q2 is 164 to 180 degrees and the allowable turning angle is 16 degrees, and the left and right turning angle Q3 is 89 to 180 degrees and the allowable turning angle is 91 degrees. The result is said to have been done.
When the angle range defined above is 60 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 104 to 120 degrees, the allowable turning angle is 16 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 196 degrees and the allowable turning angle is 16 degrees, and the left and right turning angle Q3 is 104 degrees to 196 degrees and the allowable turning angle is 92 degrees. Yes.
However, in the two specific examples described above, both of these products were extremely small in the range of rotational movement and showed little practicality.

FIG. 34 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.
On the other hand, Table 11 shows experimental results when the ratio R1 / X1 is set to 1.7 in the present invention. In Table 11, the reference plane inside the sphere is further shown. The distance L1 (mm) between T and the edge peripheral edge 12 is changed between 18% and 25% with respect to the maximum sphere diameter R1 of the sphere, and at the same time, the set angle F is set to each setting condition. In this figure, the angle that can be taken in the maximum range is set in consideration, and the results of measuring the rotation angles of the three maximum allowable ranges are shown.
That is, according to the above-described experiment, in the case where the distance L1 (mm) is set to 18%, the maximum allowable angle range of the set angle F is 33 degrees to 69 degrees, and more or more Taking the following angle range was physically difficult.
That is, according to the experimental results in Table 11, when the angle range defined above is 33 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 65 degrees to 102 degrees, and the allowable turning angle. Is 37 degrees, the reverse turning angle Q2 is 145 to 182 degrees and the allowable turning angle is 37 degrees, and the left and right turning angle Q3 is 65 to 182 degrees and the allowable turning angle is 117 degrees. The result is said to have been done.

When the angle range defined above is 69 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 100 degrees to 137 degrees, the allowable turning angle is 37 degrees, and the reverse The result shows that the turning angle Q2 is 179 degrees to 217 degrees and the allowable turning angle is 38 degrees, and the left and right turning angle Q3 is 100 degrees to 217 degrees and the allowable turning angle is 117 degrees. Yes.
However, in any of the above-described experiments, it has been found that there is a problem in strength because the range of the lap portion at the peripheral edge portion 12 is small.
FIG. 35 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

On the other hand, according to the experiment described above, in the case where the distance L1 (mm) is set to 21%, the set angle F has a maximum allowable angle range of 35 degrees to 65 degrees, or more or more Taking the following angle range was physically difficult.
According to other experimental results according to Table 11, when the angle range defined above is 35 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 71 degrees to 100 degrees. The allowable turning angle is 29 degrees, the reverse turning angle Q2 is 150 degrees to 179 degrees, the allowable turning angle is 29 degrees, and the left and right turning angle Q3 is 71 degrees to 179 degrees, and the allowable turning angle is 108. The result that the degree was obtained is shown.
On the other hand, when the angle range defined above is 65 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 100 degrees to 130 degrees, the allowable turning angle is 30 degrees, and the reverse The results show that the turning angle Q2 is 179 to 209 degrees and the allowable turning angle is 30 degrees, and the left and right turning angle Q3 is 100 to 209 degrees and the allowable turning angle is 109 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.

FIG. 36 is a diagram showing how the second straight pipe portion 5 can pivot with respect to the first straight pipe portion 1 in the two experiments.
Further, according to the above-described experiment, in the case where the distance L1 (mm) is set to 22%, the maximum allowable angle range of the set angle F is 37 degrees to 64 degrees, and more or more Taking the following angle range was physically difficult.
According to other experimental results according to Table 11, when the angle range defined above is 37 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 75 degrees to 98 degrees. The allowable turning angle is 23 degrees, the reverse turning angle Q2 is 153 to 180 degrees, the allowable turning angle is 25 degrees, and the left and right turning angle Q3 is 75 to 180 degrees, and the allowable turning angle is 105. The result that the degree was obtained is shown.

On the other hand, when the angle range defined above is 64 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 98 to 128 degrees, the allowable turning angle is 30 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 207 degrees and the allowable turning angle is 27 degrees, and the left and right turning angle Q3 is 98 degrees to 207 degrees and the allowable turning angle is 109 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.
FIG. 37 is a diagram showing how the second straight pipe portion 5 can pivot with respect to the first straight pipe portion 1 in the two experiments.

Next, in the above experiment, when the distance L1 (mm) is set to 23%, the maximum allowable angle range of the set angle F is 39 degrees to 62 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results shown in Table 11, when the angle range defined above is 39 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 79 degrees to 101 degrees and the allowable turning angle. Is 21 degrees, the reverse turning angle Q2 is 160 to 179 degrees and the allowable turning angle is 22 degrees, and the left and right turning angle Q3 is 79 to 180 degrees and the allowable turning angle is 101 degrees. The result is said to have been done.
Further, when the angle range defined above is 62 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 101 degrees to 123 degrees, the allowable turning angle is 22 degrees, and the reverse The result shows that the turning angle Q2 is 180 degrees to 203 degrees and the allowable turning angle is 23 degrees, and the left and right turning angles Q3 are 101 degrees to 203 degrees and the allowable turning angle is 102 degrees. Yes.
From these experimental results, it has been found that both of the above-mentioned experiments have substantially ideal functions and characteristics as the above-described universal joint for liquid fluid connection piping.
FIG. 38 is a diagram showing how the second straight pipe portion 5 can turn with respect to the first straight pipe portion 1 in the two experiments.

Next, in the above experiment, when the distance L1 (mm) is set to 25%, the maximum allowable angle range of the set angle F is 41 degrees to 61 degrees, or more It was physically difficult to take a smaller angle range.
That is, according to the experimental results in Table 11, when the angle range defined above is 41 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 82 degrees to 101 degrees and the allowable turning angle. Is 19 degrees, the reverse turning angle Q2 is 159 to 181 degrees and the allowable turning angle is 22 degrees, and the left and right turning angle Q3 is 82 to 181 degrees and the allowable turning angle is 99 degrees. The result is said to have been done.

When the angle range defined above is 61 degrees, the normal turning angle Q1 of the second straight pipe portion 5 is 101 degrees to 122 degrees, the allowable turning angle is 21 degrees, and the reverse The results show that the turning angle Q2 is 181 degrees to 200 degrees and the allowable turning angle is 19 degrees, and the left and right turning angles Q3 are 101 degrees to 200 degrees and the allowable turning angle is 99 degrees. Yes.
However, in both of the above two specific examples, since the range of the lap portion at the edge peripheral edge portion 12 is small, there is a problem in strength, and at the same time, the rotational movable range is extremely small and practical. It was a product with almost no properties.
FIG. 39 is a diagram showing how the second straight pipe portion 5 can pivot with respect to the first straight pipe portion 1 in the two experiments.

That is, in the present invention, as a preferable essential component, in the universal pipe joint for a liquid fluid passage manufactured under conditions deviating from the angular range, the maximum diameter R1 of the spherical curved portion described above is set. The setting condition regarding the ratio R1 / X of the diameter X1 of the first straight pipe portion and the distance at which the peripheral edge portion of the first fitting portion described later is separated from the reference plane T While taking into consideration the setting conditions and the like, the refraction or rotation angle between the straight pipe portions 1 and 5 cannot be made large, and the object of the present invention cannot be sufficiently achieved.
That is, when the angle F is set to 38 degrees or less, the turning angle range of the second straight pipe portion 5 with respect to the first straight pipe portion 1 can be large, but on the contrary, the first and first Since the overlapping area (range) of the two spheres in the fitting portion 2 becomes small, for example, setting of the packing 15 becomes impossible, and at the same time, the mutual strength and stability between the fitting portions are stable. There is a disadvantage that sliding operation is impossible.

On the other hand, when the angle F is set to 68 degrees or more, the turning angle range of the second straight pipe portion 5 with respect to the first straight pipe portion 1 becomes extremely narrow, and the first joint as the universal joint It is determined that it is impossible to set an arbitrary turning angle between the straight pipe portion 1 and the second straight pipe portion 5.
Therefore, in the present invention, the angle F is desirably set to 38 degrees to 68 degrees, more preferably 40 degrees to 65 degrees, and particularly preferably the angle F is set to 45 degrees. is there.

Further, in the present invention, in the mutual fitting portion between the first connection structure portion 4 and the second connection structure portion 8, both the fitting portions 3 and 7 overlapped with each other, In order to make it possible to stably slide or rotate, and at the same time to make the waterproofness or water-proofing perfect, and in order to create a stronger fitting state, the first connection structure portion 4 is particularly suitable. An annular groove portion 16 having an appropriate shape is provided on the inner peripheral wall portion of the extended first fitting portion 3 in the inner portion, and the annular groove portion 16 is made of a material having appropriate elasticity and friction characteristics. The fixed packing material 15 is arranged and fixed.
That is, in one specific example of the present invention, the first and second fitting portions 3 and 7 are arranged on the inner surface portion and the inner side of the fitting portion on the outer side. The packing portion 15 is disposed between the outer surface of the fitting portion on the side and the reference plane T and the peripheral edge portions 12 and 13 of the end portion.
Although the cross-sectional shape and material of the packing material 15 used in the present invention are not particularly specified, it is preferable to use a material having compression elasticity and a large friction coefficient as a constituent material, It is also desirable to use a material having water expandability.
On the outer surface corresponding to the inner peripheral wall portion of the extended first fitting portion 3 where the annular groove 15 is provided, an appropriate reinforcing annular projection 15 ′ has an appropriate shape. It may be arranged with

Here, a preferred specific example of the packing material 15 used in the present invention will be described in detail with reference to FIG.
That is, it is preferable that the packing material 15 used in the present invention is basically formed of a material that absorbs moisture and expands, and is particularly specified as the material. Instead, it is possible to use known materials.
On the other hand, the packing portion 15 used in the present invention is formed of a flat belt-like annular body, and the packing portion 15 has an outer outer surface 19 fitted on the side disposed on the outer side. The inner surface 14 of the packing portion 15 is held on a part of the inner surface portion 3 ′ of the portion 3, and the outer surface of the fitting portion 7 on the inner side of the fitting portion 3. 7 'and the fitting portion 3 of the packing portion 15 in the fitting portion 3 on the surface that contacts the outer surface 7' of the fitting portion 7 on the inner side. At least one annular continuous groove portion 16 is provided along the inner wall periphery of the portion 3.
The packing portion is fitted and held in the annular recessed groove portion 16 formed in a part of the inner surface portion of the fitting portion on the side disposed on the outside.
On the other hand, the packing portion 15 is preferably provided with an annular reinforcing layer 17 made of a hard material having a predetermined thickness on the outer outer surface portion 19 of the annular body formed in the belt-like body. It is an example.
By using the reinforcing member 17 in combination, the packing portion 15 can be held in the groove portion 16 in a stable state, and at the same time, the cost of the packing portion 15 can be reduced and the durability can be improved.

Further, in the packing portion 15 according to the present invention, at least one recessed groove portion 18 is formed on the surface 14 that contacts a part of the outer surface portion 6 of the other fitting portion 7 of the packing portion 15. Further, it is also a desirable specific example that the packing portion 15 is formed in parallel with the central axis in the longitudinal direction.
In the present invention, the above-described recessed groove portion 18 is formed in the packing portion 15, so that the packing portion 15 actually contacts the outer surface portion 6 of the other fitting portion 7 in pressure contact. At this time, as shown in FIG. 22B, the concave groove portion 18 is deformed and compressed, so that the contact surface of the other fitting portion 7 with the outer surface portion 6 in the packing portion 15 is compressed. Since 14 can be completely brought into close contact with the outer surface portion 6 of the other fitting portion 7 without being deformed, it becomes possible to exhibit complete waterproofness and water shielding.
Further, as a structural feature of the packing portion 15 according to the present invention, the outer surface portion 3 ″ of the fitting portion 3 on the outer side is a fitting portion on the outer side. It is also a preferred specific example that an outwardly bulging portion 15 ′ is provided at a portion of the inner surface portion 3 ′ of the portion 3 that faces the portion where the annular recessed groove portion 16 is formed.
By adopting such a configuration, it is possible to reinforce the portion where the packing portion 15 is arranged, and an improvement in overall strength can be expected.

Next, if the configuration of the second connection structure portion 8 in the present invention is described in more detail, FIG. 3A is a side view thereof, and FIG. 3B is a perspective view thereof.
By the way, the basic structure of the second connection structure portion 8 is as described above, and in particular, the maximum diameter R2 of the spherical curved portion in the second fitting portion 7 is the second straight pipe. The diameter is preferably set to be 1.5 to 1.7 times larger than the diameter X2 of the portion 5, and particularly preferably, the maximum diameter R2 of the spherical curved portion is larger than the diameter X2 of the second straight pipe portion. Is also set to 1.6 times.

Next, the reference plane T included in the second connection structure portion 8 in the present invention is the same as the reference plane T formed by the first connection structure portion 4 described above.
FIG. 4 is a perspective view of the universal pipe joint 100 for liquid fluid passage configured by fitting and connecting the first connection structure portion 4 and the second connection structure portion 8 according to the present invention, corresponding to FIG. 1. FIG.
In the figure, reference numeral 20 denotes a slide surface in the second fitting portion 7 in the second connection structure portion 8.
One of the features of the liquid fluid passage universal pipe joint 100 according to the present invention is that, as described above, the area of the overlapping portions of the first and second fitting portions 3 and 7 or The size of the first fitting portion 3 is approximately twice the area of the outer surface portion formed between the reference plane T and the edge peripheral edge portion 12. By adopting the configuration, the joint strength between the first and second fitting portions 3 and 7 is improved, and the mutual sliding operation and turning operation between the both are smoothly executed, and a stable operation is achieved. In addition to being realized, the fitting portion can effectively absorb shocks and vibrations caused by external factors, so that the vibration control performance and the earthquake resistance are improved.

Further, in the universal pipe joint 100 for liquid fluid passage according to the present invention, as shown in FIG. 1, the first fitting portion 3 having the first spherical curved portion and the The boundary part with the second fitting part 7 is characterized in that an uneven part or a step part is not formed, so that the gas or liquid fluid flowing through the pipe part is connected to the pipe. It is possible to completely prevent the danger of streaking at the joint part of the part and generating a new problem.
That is, as shown in FIG. 1, in the universal pipe joint 100 for liquid fluid passage according to the present invention, a part of the inner surface 9 of the first or second straight pipe portion 1, 5, A part of the inner surface 10 of the first or second fitting part 3, 7 forms a continuous flat part 11, and this part is connected to the universal pipe joint 100 for liquid fluid passage. It is particularly desirable that it is formed at the lower end portion of the first straight pipe portion 1.

In the present invention, for example, the first straight pipe portion 1 corresponding to the inner surface of the lower end portion of the first straight pipe portion 1 in which the continuous flat portion 11 is formed. It is also a desirable example that an appropriate marker portion 21 is provided on the outer surface portion of the universal joint corresponding to the lower end portion of the outer surface portion.
By adopting such a configuration, the worker easily arranges and arranges a certain portion of the marker portion 21 provided in the universal pipe joint 100 for liquid fluid passage downwardly at the construction site. As a result, the flow of various liquid fluids used can be made efficient.
That is, in the present invention, when the universal joint is constructed, the marker 21 notifies the instruction to arrange the marker 21 so that the position of the marker 21 is the lowest part of the universal joint 100. A function is given.
That is, even if a part of the liquid fluid stays inside the liquid fluid pipe, the entire pipe system may cause a defective state of the flow of the liquid fluid. By performing the installation work so that the portion is always faced downward when piping, it is possible to always generate and maintain a smooth flow inside the liquid fluid piping.

Moreover, in another specific example of the universal pipe joint for liquid fluid passage 100 according to the present invention, the fitting that is fitted inside among the first and second fitting portions 3 and 7. At least a part of the peripheral edge 12 of the end of the fitting part 3 fitted inside the first and second fitting parts 3, 7 on at least a part of the outer surface of the part 7 It is also a desirable specific example to provide the stopper parts 30 and 31 to contact.
On the other hand, in the 1st and 2nd fitting parts 3 and 7 in the universal pipe joint 100 for liquid fluid passages concerning the present invention, the inside of the curved body 2 of the fitting part 3 arranged on the outside The sphere diameter is slightly larger than the outer sphere diameter of the curved body 6 of the fitting portion 7 disposed inside the sphere so that the both can easily slide and rotate in a watertight manner. It is desirable to be set to (micron order).

Next, the first first connection structure portion 4 and the second connection structure portion 8 having the above-described technical configuration in the universal pipe joint for liquid fluid passage 100 according to the present invention are fitted. The straight pipe part connecting mechanism makes it easy to set the connection part refraction angle formed by the straight pipe parts 1 and 5 individually connected to the fitting parts 3 and 7 in a wide range and in almost all directions. The fact that the angle can be adjusted and changed for each minute angle is described with reference to FIGS.
As another specific example in the present invention, as shown in FIG. 3, the spherical portion of the fitting portion that is fitted inside among the first and second fitting portions 3 and 7. At least a part of the outer peripheral surfaces 12 and 13 of the fitting part fitted to the outside of the first and second fitting parts, at least a part of the outer surfaces of It is a desirable example that at least one stopper portion 30, 31 in contact is provided.
And it is desirable for the said stopper parts 30 and 31 to be comprised by the dotted | punctate protrusion part or the continuous convex collar part.
In yet another specific example, as shown in FIG. 15, for example, the first fitting portion 3 is arranged on the downstream side and the second fitting portion 7 is arranged on the upstream side. The diameter of the second straight pipe part 5 provided in the second fitting part 7 is the first straight pipe part 1 provided in the first fitting part 3. In the case where the diameter is smaller than the diameter of the first fitting portion, the stopper portion 30 is on the outer plane 7 of the spherical body portion 6 of the second fitting portion 7 and temporarily. 3 when the second straight pipe part 55 having the same diameter as that of the first straight pipe part 1 connected to 3 is used in the second fitting part 7. The second straight pipe portion 55 and the spherical body portion 6 of the second fitting portion 7 are preferably arranged in a curved shape along the virtual connection line 32 defined when the second straight pipe portion 55 and the spherical portion 6 of the second fitting portion 7 are joined. Arbitrariness.

Furthermore, in the present invention, the packing material 36 is provided in the peripheral portion 35 near the edge on the free end side of at least one of the first and second straight pipe portions 1 and 5. Furthermore, it is a preferable specific example that it is arranged, and is an effective configuration particularly when the diameters of the first and second straight pipe portions 1 and 5 exceed 100 mm.
Here, when compared with the conventional method, the connection work in the liquid fluid piping indoor or underground using the universal pipe joint for liquid fluid passage 100 according to the present invention, first, as described above, In the conventional method, as shown in FIG. 16, for example, a pipe layer portion 93 formed between a slab (floor) 91 and a ceiling portion 92 of a building generally has a construction cost of the building. Therefore, it is configured with a very narrow space region, and therefore, the same narrow pipe between the end portion of the straight pipe portion 94 that has penetrated the slab 91 and the outer wall portion 101 and the inner wall portion 120 of the building. An opening 108 of the drainage main pipe 96 located in the piping layer portion 93 of the drainage main pipe 96 arranged substantially vertically in the layer 93 ′ from the upper floor to the lower floor The pipe part 95 is connected and connected to complete the liquid fluid movement path. However, in the prior art, for example, the 90 degree elbow pipes 103 and 104 are used for connection, but the inside of the pipe layer portion 93 is extremely narrow. Using a pipe, it is impossible to complete the connecting operation while giving a predetermined gradient to the straight pipe portion 95. Therefore, conventionally, as shown in FIG. In part, the two 90 degree elbow pipes 103, 104 are used, and the 90 degree elbow pipes 103, 104 are arranged in the respective connecting parts via another straight pipe part 110 in the middle part. While selecting and adjusting the orientation, the end portion of the straight pipe portion 94 and one end portion of the drainage main pipe 96 are connected and connected, and the two 90-degree elbow pipes 105 are connected in the same manner. , 106 and the intermediate straight pipe portion 111, Coupling connects the opening 108 at one end and the drainage mains 96 of the main pipe 96.

On the other hand, as shown in FIG. 18, the bottom end of the drain main 96 and the open end of the straight pipe 97 connected to the drain receiving port 112 of the drain trough (also called PVC) 102 are The same 90 degree elbow pipe 107 is used to complete the pipe connection.
At that time, since the inside of the pipe layer portion 93 and the inside of the pipe layer 93 ′ are narrow, there are many cases in which some 90-degree elbow pipes 104 and 105 cannot be expanded in the lateral direction to perform the connecting operation. In many cases, the straight pipe portion 95 cannot be given a predetermined gradient, and the straight pipe portion 95 ends the piping operation without forming the predetermined gradient.
On the other hand, in the present invention, as shown in FIG. 18, the straight pipe portion 94 is directly connected to the straight pipe portion 94 by using the liquid fluid passage universal pipe joint 100 manufactured under the technical idea of the present invention. Pipe connection work between the pipe parts 95 and 96 and the straight pipe part 97 can be performed quickly and easily in a short time while applying a necessary angle adjustment while giving a predetermined gradient even in the space region in the narrow pipe layer 93. Can be executed.

Similarly, in an apartment building such as a multi-story house or office, the straight pipe part 96 piped in series in the vertical direction is individually connected to the pipe 95 described above for each level. The liquid fluid passage universal pipe joint 100 according to the above is appropriately used at a required portion.
In connection with the drainage receiving port 112 of the drainage basin portion 102 disposed outdoors, the liquid pipe is connected to the open end portion of the straight pipe portion 97 and the straight pipe portion disposed in the drainage reception port 112 of the drainage basin portion 102. The pipe connection is completed using the universal pipe joint 100 for passage.
Further, as shown in FIG. 19, the drainage from the drainage trough 102 in FIG. 14 is connected to the sewer main installed on the underground surface such as a road from the straight pipe portion 103 for drainage provided in the drainage trough 102. One or a plurality of connecting pipe groups 104 to 106 for draining into the pipe 107 may be connected to each other at an appropriate interval using the liquid fluid passage universal pipe joint 100 according to the present invention. Is possible.

Since the universal pipe joint for liquid fluid passage 100 according to the present invention employs the essential technical configuration as described above, it is between the first straight pipe portion 1 and the second straight pipe portion 5. The swivel angle is extremely wide and fine adjustment is possible, and it is possible to easily perform a swivel operation based on a strong and stable sliding action. Since it is also possible to freely set the aperture difference with the side straight pipe portion 1, any angle change or gradient setting can be made between a plurality of adjacent straight pipe portions to be connected, and Since the angle adjustment at the time of the angle change can be performed in a fine range, an arbitrary angle change between straight pipe portions is also possible, particularly in a piping space inside a building, which is usually provided with only a narrow space or area. And gradient settings are possible.
Further, the universal pipe joint for liquid fluid passage 100 according to the present invention has a high overall strength and can prevent breakage, breakage or drop-off even when subjected to a considerable external force, and absorbs vibration from the outside. Excellent power.

Moreover, since the universal pipe joint for liquid fluid passage 100 has a stable and reliable turning function between the straight pipe portions, it is possible to effectively absorb external impacts and vibrations by the straight pipe portions. Therefore, it is also a construction member with excellent vibration control and earthquake resistance.
In particular, when a pair of at least two of the liquid fluid passage universal pipe joints 100 are used at both ends of a predetermined straight pipe portion, the respective vibration absorbing forces of the liquid fluid passage universal pipe joints 100 are the same. It is possible to construct a piping system that exhibits a synergistic effect and is excellent in vibration control and / or earthquake resistance.
That is, the piping construction method shown in FIGS. 18 and 19 completes a piping structure and system excellent in earthquake resistance, which was not obtained by the conventional method.
FIG. 20 and FIG. 21 also show a piping construction example of another specific example of the piping structure and its system excellent in vibration control and earthquake resistance.
In other words, in a building piping, a universal pipe joint 100 having an effect of absorbing vibration caused by an earthquake is provided for each floor, and a combination of exchange repair sockets (also referred to as shrink joints) for shrinkage, Alternatively, when tightening the pipe with a fixed support, use a felt or the like in the bunt so as not to damage the pipe, and use it under and before the universal pipe joint 100. Furthermore, for buried pipes, The universal pipe joint 100 is seismically absorbed even at one location, but by providing two or more locations, it is possible to further exhibit seismic control and seismic performance.

In addition, although the manufacturing method of the said fluid fluid seismic control property and the universal pipe joint 100 for roads which concerns on this invention is not specified in particular, it has a circular aperture | caliber from a conventionally generally known synthetic resin as a basic material. A method of forming a tubular body, forming one of the end portions thereof into each other and forming the spherical body portion on the portion fitted in the overlapping manner, or the fitting portion in advance. Or a 3D (three-dimensional) printer in which a spherical body portion having a predetermined shape is formed at the end of one of the straight pipe portions, and the end of the straight pipe portion is covered and heat-molded. Etc. can also be used for manufacturing.

Next, since the universal joint for connecting a liquid fluid pipe in the present invention has the multi-functionality as described above, the range of liquid fluid treatment equipment to which this can be applied is extremely wide. Wide range.
That is, in the present invention, a liquid fluid material including a pipe body, a receiving branch pipe, a universal branch pipe, a mass member, a manhole, etc., used for the flow treatment of a liquid fluid material including sewage, domestic wastewater, rainwater, etc. It is a processing device, and is attached to at least one branch pipe provided projecting outward from at least a part of the liquid fluid processing device or at least a part of the liquid fluid processing device. The liquid fluid processing apparatus 300 to 305 is characterized in that the liquid fluid pipe connecting universal joint 100 having the configuration as described above is attached to at least a part of the branch pipe member including the branch pipe portion to be used.

In other words, liquid fluid processing equipment used for processing liquid fluids such as sewage, domestic wastewater, rainwater, etc. includes various types including a receiving branch pipe, a free branch pipe, a mass member, a manhole, etc. in addition to the pipe body. Equipment with various functions and structures actually exist, and such liquid fluid processing equipment accepts liquid fluids such as predetermined sewage, domestic wastewater, and rainwater flowing from places other than the piping main body and multifaceted directions. Or liquid fluids such as sewage, domestic wastewater, rainwater, etc. need to be discharged to a place or direction other than the pipe body. A lot of liquid fluid processing equipment with fixed branch pipes attached in advance is sold, and according to the situation required at the site, select the one that best suits the environment. Has been used.
For example, FIG. 23 (A) shows a sewage main pipe 300 in which at least one branch pipe section 310 is attached to a side surface of a sewage main pipe 300 having a receiving joint with a lower branch.

In such a structure, one straight pipe portion 1 or 5 of the flexible fluid passage universal pipe joint 100 according to the present invention may be connected and fixed to the distal end portion of the branch pipe portion 310, or similarly, 23 (B), the universal pipe joint for a liquid fluid passage according to the present invention at the tip of at least one branch pipe section 311 provided on the side surface of a sewage main pipe 301 with a receiving joint having a lower branch. One straight pipe portion 1 or 5 of 100 may be connected and fixed.
In such a specific example, instead of at least one branch pipe portion 310, 311 provided on the side surface of the sewage main pipe 300, 301, one straight pipe of the universal pipe joint 100 for the liquid fluid passage is directly provided. It is also possible to join the tip of the section 1 or 5 to the side surface of the sewage main pipe 300 or 301.

On the other hand, FIG. 23C shows a mounting-type branch joint 303 called a so-called confluence saddle or a universal branch joint.
The attachment type universal branch pipe joint 303 is composed of a joint support plate part 304 formed in a curved shape and a branch pipe part 312 attached to a part of the surface thereof, and the branch pipe part 312 is to be attached. A member for forming an appropriate hole in a part of the outer surface of the sewage main pipe 300 or the manhole portion 306 and bonding and fixing the hole with an appropriate adhesive so as to cover the hole with the bonding support plate portion 304. is there.
Conventionally, the branch section in the liquid fluid processing equipment is required to be used in various directions depending on the intended use and the location of each pipe in the field. Each liquid fluid processing equipment manufactured multiple types of liquid fluid processing equipment with different mounting directions for the branch pipes, and responded to customer demand. There has been a problem of increasing costs including storage and storage.

On the other hand, in the present invention, the above-described attachment-type universal branch joint 303 is also provided to protrude outward from at least a part of the attachment-type universal branch joint 303. One end portion of the straight pipe portion 1 or 5 of the universal joint 100 for connecting a fluid pipe according to the present invention is joined to the outer tip portion of at least one branch pipe portion 312. Since the process of inflow of the liquid fluid flow from various directions and the process of the outflow of the liquid fluid flow to various directions can be handled at the same time by one universal branch pipe joint 303 of the attachment type, It is possible to greatly reduce the types of universal branch pipe joints 303, and at the same time, it is possible to cope with various construction work completely and easily, so construction efficiency, construction period and construction cost are all greatly increased. It from becoming possible to reduce.

On the other hand, FIG. 23D shows a concrete example of a manhole portion or mass portion 306 made of concrete or vinyl chloride, and a funnel-shaped portion 320 is arranged at the lower end portion of the manhole portion or mass portion 306. One end of the straight pipe part 1 or 5 of the universal joint 100 for liquid fluid piping according to the present invention is joined to the drain hole at the lower end of the funnel-shaped part 320, The first and second fitting parts and the other straight pipe part have a structure projecting outward from the lower end part of the manhole part or the mass part 306, and as shown in FIG. Is a structure in which a plurality of branch pipe portions 317 are attached to the outer wall portion of the lower end portion of the manhole portion or mass portion 307 made of concrete or vinyl chloride, and at least of the plurality of branch pipe portions 317. In part, the present invention Specific examples one of the distal end portion of the straight tube portion 1 or 5 of the liquid fluid piping connection for a universal joint 100 is bonded is shown that.

In the present invention, in any of the liquid fluid processing devices described above, at least one of the liquid fluid processing devices 300 to 307 is provided so as to protrude outward. By attaching the liquid fluid pipe connecting universal joint 100 according to the present invention to at least a part of the branch pipe portions 310 to 317, a single type of the liquid fluid material processing equipment 300 to 307 can be used for a plurality of types of construction work. It is possible to cope with this easily.

1: first straight pipe portion 2, 6: curved body 3 forming part of a spherical body: first fitting portion 3 ': inner surface portion 3 ": outer surface portion 4: first connection structure portion 5: 2nd straight pipe part 7: 2nd fitting part 7 ': Outer surface of 2nd fitting part 8: 2nd connection structure part 9, 10: Part of inner surface 11: Continuous plane Parts 12 and 13: Edge peripheral edge part 14: Inner surface 15 of the packing part: Packing member 15 ': Reinforcing annular protrusion 16: Annular continuous groove part 17: Annular reinforcing layer 18: Depressed groove part 19: Outer outer surface 20: Slide surface 21 in second fitting part 7 of second connection structure part 21: Marking part 30, 31: Stopper part 32: Virtual connection line 35: In the vicinity of the edge part on the free end side in the straight pipe part Part 36: Packing material 55: Temporary second straight pipe part 91: Slab (floor)
92: Ceiling part 93, 93 ': Piping layer part 94: Straight pipe part 95: Straight pipe part 96: Main pipe for drainage 97: Straight pipe part 100: Universal pipe joint for liquid fluid passage 101: Outer wall part 102: Drainage tank Portion 103, 104: 90 degree elbow pipe 105, 106: 90 degree elbow pipe 107: 90 degree elbow pipe 108: Opening part 112 drainage receiving port 120: Inner wall part 300: Sewage main pipe 301 with a receiving lower branch A sewage main pipe 303 with a submerged branch type: an attachment type branch pipe joint, a branch pipe joint 304: a joining support plate part 306, 307: a manhole part, a PVC section 310, 311, 312, 313, 315, 317: a branch pipe part 320 : Funnel-shaped part R1, R2: sphere diameter Z1, Z2: central axis P: sphere center part S1: first plane S2: second plane T: reference plane F inside the sphere: center line part and reference plane Angle L to make: The length of the section peripheral portion and the reference plane (distance)
Q1: Forward turning angle Q2: Reverse turning angle Q3: Left and right turning angle

Claims (18)

  A universal joint used in a pipe joint for a liquid fluid, wherein the universal joint includes a first straight pipe part and a part of a spherical body connected to one end of the first straight pipe part. Connected to one end portion of the first connecting structure portion constituted by the first fitting portion constituted by the curved body to be formed, the second straight pipe portion and the second straight pipe portion. The second connection structure portion is composed of a second fitting portion composed of a curved body forming a part of a spherical body, and the first and second fitting portions are Both have a spherical diameter larger than the diameters of the first and second straight pipe portions, and either one of them is fitted inside the other so that sliding or turning is possible in almost all directions. The first and second straight pipe portions have a configuration in which the spherical center portions of the first and second fitting portions are fitted and arranged so as to coincide with each other. of The mandrel is eccentrically arranged so as not to pass through the sphere center portions of the first and second fitting portions, and the center axis line of the sphere center portion and the first or second straight pipe portion In the sectional side view of the first and second straight pipe portions and at least part of the inner surface of the first or second fitting portion is a continuous plane. However, at least the peripheral edge of the end portion of the first or second fitting portion forms the center of the spherical body and the central axis of the first or second straight pipe portion. In the sectional side view of the first plane, a straight line connecting the central part of the sphere and the central line part of the straight pipe part, and a straight line set to an angle within the range of 30 to 68 degrees with the central line part Including the inside of the sphere formed on a second plane orthogonal to the first plane. Only a length of 21 to 23% with respect to the maximum diameter portion length of the sphere portion formed on the reference plane in a direction opposite to the side to which the straight pipe portion is connected from the quasi-plane. And the maximum spherical diameter of the spherical body portion in the first or second fitting portion is the diameter of the first or second straight pipe portion. Universal joint for liquid fluid piping joints, characterized in that it is set to have a sphere diameter 1.5 to 1.7 times larger than that. The angle formed between the center line of the straight pipe part and the straight line connecting the center of the sphere and the center line part of the straight pipe part is 38 to 68 degrees, more preferably 40 to 65 degrees. The universal joint for liquid fluid piping joints according to claim 1.   The overlapping portions of the first and second fitting portions are approximately 2 of the outer surface area formed between the reference plane and the peripheral edge of the first or second fitting portion. The universal joint for liquid fluid pipe joints according to claim 1 or 2, wherein the joint is formed twice.   Between the inner surface portion of the fitting portion on the outer side of the first and second fitting portions and the outer surface of the fitting portion on the inner side, and The liquid joint joint for a liquid fluid pipe according to any one of claims 1 to 3, wherein a packing part is disposed between the reference plane and the peripheral edge part of the end part. A part in which a part of the inner surface of the first or second straight pipe part and a part of the inner surface of the sphere part in the first or second fitting part form a continuous flat part. 5. The universal joint for a liquid fluid pipe joint according to claim 1, wherein an appropriate marker is provided on the outer surface of the universal joint corresponding to the above.   When the said joint part constructs the said universal joint, the function (protrusion part, line formation, recessed part, etc.) which alert | reports an instruction | indication is arrange | positioned so that the position of the said marker part may become the lowest part of the said universal joint. The universal joint for liquid fluid pipe joints according to claim 5, wherein the joint is provided.   Among the first and second fitting portions, at least a part of the outer surface of the spherical body portion of the fitting portion to be fitted on the inside is within the first and second fitting portions. 7. The liquid fluid pipe according to claim 1, further comprising at least one stopper portion that comes into contact with at least a part of the peripheral edge portion of the end portion of the fitting portion that is fitted to the outside. Universal joint for joints.   The universal joint for liquid fluid piping joints according to claim 7, wherein said stopper part is constituted by a point-like projection part or a continuous convex collar part.   The first fitting portion is disposed on the downstream side, and the second fitting portion is disposed on the upstream side, and the second fitting portion is provided in the second fitting portion. In the case where the diameter of the straight pipe portion is smaller than the diameter of the first straight pipe portion provided in the first fitting portion, the stopper portion is the one of the second fitting portion. A second straight pipe part on the outer plane of the sphere part and having the same diameter as that of the first straight pipe part connected to the first fitting part is the second fitting. It is assumed that the second straight pipe portion and the sphere portion of the second fitting portion are joined together in a curved shape along a virtual connection line when it is assumed that the joint portion is used. The universal joint for liquid fluid pipe joints according to claim 7 or 8, wherein   The packing material is arrange | positioned in the peripheral part vicinity of the edge part by the side of the free end in at least one straight pipe part of the said 1st and 2nd straight pipe parts, The thru | or 1 characterized by the above-mentioned. The universal joint for liquid fluid piping joints as described in any one of 9 above.   In the first and second fitting portions, the inner spherical diameter of the curved body of the fitting portion arranged outside is larger than the outer spherical diameter of the curved body of the fitting portion arranged inside. The liquid fluid pipe according to any one of claims 1 to 10, characterized in that the length is set to a length that is slightly large enough to allow both of them to slide and rotate in a watertight manner easily. Universal joint for joints.   The packing part is formed of a flat belt-like annular body, and the packing part is held on a part of the inner surface part of the fitting part on the outer side on the outer outer surface thereof. The inner surface of the packing portion is in contact with the outer surface of the fitting portion on the inner side of the fitting portion, and within the fitting portion of the packing portion, At least one annular continuous groove portion is provided along a longitudinal central axis of the annular body on a surface that is in contact with the outer surface of the fitting portion on the side disposed on the inner side. The universal joint for liquid fluid piping joints according to claim 4.   The universal joint for a liquid fluid pipe joint according to claim 12, wherein the packing part is made of a material having a characteristic of absorbing moisture and expanding.   The liquid fluid piping according to claim 12 or 13, wherein the packing portion is provided with an annular reinforcing layer made of a hard material having a predetermined thickness on an outer outer surface portion of the annular body. Universal joint for joints. The said packing part is hold | maintained in the annular recessed groove part currently formed in a part of internal surface part of the fitting part by the side arrange | positioned on the said outer side, The thru | or 12 thru | or 14. A universal joint for a liquid fluid pipe joint according to any one of claims 14 to 14.   The outer surface portion of the fitting portion on the side disposed on the outer side, and the portion where the annular concave groove portion is formed on the inner surface portion of the fitting portion on the outer side. The universal joint for liquid fluid piping joints according to claim 15, wherein an outward bulging portion is provided at a portion opposite to the surface.   In the packing portion, at least one recessed groove portion is formed in parallel with the longitudinal central axis of the packing portion on a surface that contacts a part of the outer surface portion of the other fitting portion of the packing portion. The universal joint for liquid fluid piping joints according to any one of claims 4, 12 to 16, wherein   A liquid fluid processing apparatus including a pipe body, a receiving branch pipe, a universal branch pipe, a mass member, a manhole, etc., used for fluid processing of liquid fluid including sewage, domestic wastewater, rainwater, etc. A branch pipe member including at least one branch pipe provided projecting outward from at least a part of the material treatment apparatus, or a branch pipe part used by being attached to at least a part of the liquid fluid treatment equipment A liquid fluid processing apparatus, wherein a universal joint for connecting a liquid fluid pipe as defined in any one of claims 1 to 17 is attached to at least a part of the branch pipe part.

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