JP6820699B2 - Flange fittings - Google Patents

Description

The present invention relates to a piping member to which a fluid transport pipe is connected, and more particularly to a pipe joint used to connect two pipes having different pipe axes for transporting a fluid such as water or a chemical solution.

When constructing pipes for plant equipment, equipment, hot water supply equipment, etc., there is a technology for connecting two pipes whose pipe axes do not match by combining multiple elbows and bends to absorb the deviation of the pipe shaft. (See, for example, Patent Document 1). In addition, as a technique for connecting two pipes whose pipe axes do not match by using one pipe joint, a pipe in which a plurality of members formed by dividing in advance on the surface including the pipe shaft of the pipe joint are integrated. Some joints were used to absorb the deviation of the pipe shaft (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 9-14492 Japanese Unexamined Patent Publication No. 7-205299

However, in the technique of connecting the two pipes of Patent Document 1, since a plurality of joints and pipes are combined, the number of connection points increases. Therefore, there is a risk that the work man-hours will increase and fluid leakage from the connection portion will easily occur. In addition, when combining general-purpose joints and pipes, since the dimensions of the joints are fixed in advance, there is a risk that the number of bent parts and detours will increase, resulting in a large pipe shape and a large pressure loss. is there. Further, in the pipe joint of Patent Document 2, since a plurality of members formed in advance are integrated to form one pipe joint, there is a possibility that fluid leakage is likely to occur due to poor joint at the joint portion.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, and two pipes having misaligned pipe axes can be connected compactly while reducing fluid leakage and reducing pressure loss. It is to provide a flanged pipe joint that can be made.

In order to achieve the above-mentioned object, the first aspect of the present invention includes a pipe portion and a flange portion arranged at one end of the pipe portion so as to be inclined with respect to the pipe portion, and includes a first opening and a first. A flanged pipe joint having a flow path having two openings inside, the first opening is arranged on the contact surface of the flange portion, the second opening is arranged on the other end of the pipe portion, and the first The first virtual plane including the opening and the second virtual plane including the second opening are orthogonal to each other, the center line of the flow path is inclined with respect to the first opening, and the second opening is arranged in the pipe portion. The third virtual plane having a straight pipe portion and not including the center of the first opening but including the center of the second opening and the center line of the straight pipe portion is orthogonal to each of the first virtual plane and the second virtual plane. It is characterized by.
A second aspect of the present invention is characterized in that, in the first aspect, the pipe portion further has a curved portion.
In the third aspect of the present invention, in the second aspect, the pipe portion has a first straight pipe portion and a second straight pipe portion, and a flange portion is connected to one end of the first straight pipe portion. It is characterized in that a curved portion is provided between the other end of the first straight pipe portion and one end of the second straight pipe portion.
A fourth aspect of the present invention is characterized in that, in the second aspect, the pipe portion further has a curved pipe portion, and a flange portion is connected to one end portion of the curved pipe portion.
A fifth aspect of the present invention is characterized in that, in the fourth aspect, the center line of the curved pipe portion corresponds to one arc.
A sixth aspect of the present invention is characterized in that , in any one of the first to fifth aspects, a reinforcing portion is provided at a connecting portion between the pipe portion and the flange portion.
In the seventh aspect of the present invention, in any one of the first to sixth aspects, the pipe portion and the flange portion are integrally molded by injection molding, and the parting surface of the injection molding mold is the pipe portion. It is characterized in that it is on a plane including the center line of.

In the flanged pipe joint according to the present invention, since the pipe portion and the flange portion are integrated, the first opening and the second opening, which are connected to the two pipes outside the flanged pipe joint, are combined into one pipe. Can be communicated with members. Therefore, the construction becomes easier and the fluid leakage can be reduced as compared with the case where a plurality of joints and pipes are combined. Further, the pipe shape from the first opening to the second opening can be made compact.

Further, in the flanged pipe joint according to the present invention, the center line of the flow path is inclined with respect to the first opening. As a result, the portion corresponding to the pipe portion of the flow path and the portion corresponding to the flange portion of the flow path can be smoothly connected, and the flow is forcibly bent when the fluid approaches the flange portion from the pipe portion. The pressure loss can be reduced without any problem.

It is a perspective view (a) and another perspective view (b) of the flanged pipe joint which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the use state of the flanged pipe joint which concerns on 1st Embodiment of this invention. It is a perspective view (a) and another perspective view (b) of the flanged pipe joint which concerns on 2nd Embodiment of this invention. It is a plan view (a) and a front view (b) of a flanged pipe joint which concerns on the 2nd Embodiment of this invention. It is a schematic diagram which shows the positional relationship between the 1st opening and the 2nd opening of the flanged pipe joint which concerns on 2nd Embodiment of this invention. It is a perspective view (a) and another perspective view (b) of the flanged pipe joint which concerns on the modification of the 2nd Embodiment of this invention. It is a perspective view (a) and another perspective view (b) of the flanged pipe joint which concerns on 3rd Embodiment of this invention. It is a top view (a) and a front view (b) of a flanged pipe joint which concerns on the 3rd Embodiment of this invention. It is a perspective view (a) and another perspective view (b) of the flanged pipe joint which concerns on the modification of the 3rd Embodiment of this invention.

(First Embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a flanged pipe joint according to the first embodiment of the present invention, and FIG. 2 is a schematic view showing a usage state of the flanged pipe joint according to the first embodiment of the present invention.

The flanged pipe joint 1 shown in FIG. 1 is made of rigid polyvinyl chloride and is manufactured by injection molding. The flanged pipe joint 1 includes a circular straight tubular pipe portion 2 and a flange portion 3 integrally provided at one end of the pipe portion 2. Here, the pipe portion 2 is provided so as to be inclined with respect to the flange portion 3. An elliptical first opening 4 is provided at one end of the flanged pipe joint 1 (contact surface 7 where the flange portion 3 abuts on an external piping member), and a circular second opening 5 is provided at the other end. It is arranged, and a flow path 6 connecting the first opening 4 and the second opening 5 is formed inside. The flow path 6 is shown by a broken line in FIG. Since the flow path 6 is provided so as to be inclined with respect to the flange portion 3 like the pipe portion 2, the center line L of the flow path 6 is provided so as to be inclined with respect to the first opening 4.

Next, the operation of the flanged pipe joint 1 of the first embodiment will be described with reference to FIG. In FIG. 2, reference numeral 8 is a chemical solution tank for storing the chemical solution, and a flange joint 9 is provided on an inclined surface arranged above the chemical solution tank 8. A gasket (not shown) is arranged in the flange joint 9, and the flange portion 3 of the flanged pipe joint 1 is further connected by bolts. The end of the flanged pipe joint 1 on the second opening 5 side is connected to the socket joint 10 of the external pipe.

In the flanged pipe joint 1, since the pipe portion 2 and the flange portion 3 are integrated, the first opening 4 and the second opening 5 connected to the external pipes can be communicated with each other by one pipe member. Therefore, the construction becomes easier and the fluid leakage can be reduced as compared with the case where a plurality of joints and pipes are combined. Further, the pipe shape from the first opening 4 to the second opening 5 can be made compact.

Further, in the flanged pipe joint 1, the center line L of the flow path 6 is inclined with respect to the first opening 4. As a result, the flow path 6 in the pipe portion 2 and the flow path 6 in the flange portion 3 can be smoothly connected. Therefore, when the fluid flows through the portion connecting the pipe portion 2 and the flange portion 3, the flow is not forcibly bent and the pressure loss can be reduced.

Further, the center point of the first opening 4 and the center point of the second opening 5 are located on the same center line. However, the center line of the first opening 4 and the center line of the second opening 5 are inclined to each other and do not match. When the first opening 4 and the second opening 5 have such a positional relationship, the piping shape from the first opening 4 to the second opening 5 is more compact than when a plurality of joints and pipes are combined. Can be done. Further, in the first embodiment, the pipe portion 2 is a straight pipe, but it may be a curved pipe. A curved portion having a desired angle and curvature can be formed in the pipe portion 2 according to the piping conditions at the construction site.

(Second embodiment)
Further, the flanged pipe joint according to the second embodiment of the present invention will be described with reference to FIGS. 3 to 5. FIG. 3 is a perspective view of the flanged pipe joint according to the second embodiment of the present invention, and FIG. 4 is a plan view and a front view of the flanged pipe joint according to the second embodiment of the present invention. , FIG. 5 is a schematic view showing the positional relationship between the first opening and the second opening of the flanged pipe joint according to the second embodiment of the present invention. It should be noted that substantially the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals.

The flanged pipe joint 11 shown in FIGS. 3 to 5 is made of rigid polyvinyl chloride and is manufactured by injection molding. The flanged pipe joint 11 includes a pipe portion 2 having a curved portion 12 and a flange portion 3 integrally provided at one end of the pipe portion 2. The pipe portion 2 has a first straight pipe portion 13 and a second straight pipe portion 14. The first straight pipe portion 13 is a circular straight tubular portion, and the outer diameter and inner diameter are gradually reduced from one end side (first opening 4 side) to the other end side (second opening 5 side). The second straight pipe portion 14 is a circular straight tubular portion having a uniform outer diameter and inner diameter, and is longer than the first straight pipe portion 13. The outer diameter and inner diameter of the second straight pipe portion 14 are the same as the outer diameter and inner diameter of the other end side of the first straight pipe portion 13. The flanged pipe joint 11 has a curved portion 12 between the first straight pipe portion 13 and the second straight pipe portion 14. The curved portion 12 is substantially at a right angle. Further, the first straight pipe portion 13 is inclined with respect to the flange portion 3. In the flanged pipe joint 11, the first straight pipe portion 13 is provided so that the wall thickness of the first straight pipe portion 13 gradually increases from the vicinity of the other end to the flange portion 3 in order to improve the durability against pipe stress. A reinforcing portion 15 is provided at a connecting portion between the flange portion 3 and the flange portion 3. Further, an elliptical first opening 4 is disposed on one end surface of the flanged pipe joint 11, and a circular second opening 5 is disposed on the other end surface. A flow path 6 connecting the first opening 4 and the second opening 5 is provided. Like the pipe portion 2, the flow path 6 is provided so as to be inclined with respect to the flange portion 3. That is, the center line L of the flow path 6 is provided so as to be inclined with respect to the first opening 4.

As described above, the pipe portion 2 of the flanged pipe joint 11 has a different outer diameter and inner diameter between the first straight pipe portion 13 and the second straight pipe portion 14, or is outside the first straight pipe portion 13. The diameter and inner diameter are gradually reduced from one end side to the other end side. If it is attempted to form the same shape as the pipe portion 2 by combining a plurality of joints or pipes, it is necessary to use a joint having a different diameter, and the inner diameter of the pipe portion 2 changes rapidly in a stepwise manner, so that pressure loss is likely to occur. Become. In the flanged pipe joint 11, the first straight pipe portion 13 and the second straight pipe portion 14 are integrally formed, and the sizes of the outer diameter and inner diameter of the first straight pipe portion 13 are gradually changed. Therefore, the occurrence of pressure loss can be reduced. Here, a shape such as the first straight pipe portion 13 in which the outer diameter and the inner diameter are gradually reduced from one end side to the other end side can be formed by injection molding or the like.

Next, with reference to FIG. 5, the positional relationship between the first opening 4 and the second opening 5 of the flanged pipe joint 11 according to the second embodiment will be described. The first opening 4 of the flanged pipe joint 11 is connected to the flange joint 9 of the external pipe, and the second opening 5 is connected to the socket joint 10 of the external pipe. At this time, the first opening 4 is arranged on the first virtual plane S1, the second opening 5 is arranged on the second virtual plane S2, and the first virtual plane S1 and the second virtual plane S2 are orthogonal to each other. ing. The center point P2 of the second opening 5 and the center line L2 of the second straight pipe portion 14 are on the third virtual plane S3, and the third virtual plane S3 is the first virtual plane S1 and the second virtual plane S2. It is orthogonal to each. The center point P1 of the first opening 4 is not on the third virtual plane S3.

When the first opening 4 and the second opening 5 have such a positional relationship, if a plurality of joints or pipes are combined to communicate the flange joint 9 to the socket joint 10, the pipe shape tends to be large. In particular, if the distance between the flange joint 9 and the socket joint 10 is narrow, it may not be possible to assemble a pipe suitable for the distance. In the flanged pipe joint 11, since the pipe portion 2 having the curved portion 12 and the flange portion 3 inclined with respect to the pipe portion 2 are integrated, the flange joint 9 and the socket joint 10 are combined into one pipe. Can be communicated with members. Therefore, the construction becomes easier and the fluid leakage can be reduced as compared with the case where a plurality of joints and pipes are combined. Further, the pipe shape from the first opening 4 to the second opening 5 can be made compact.

Further, the flanged pipe joint 11 is injection-molded because the pipe portion 2 is composed of two straight pipe portions (first straight pipe portion 13 and second straight pipe portion 14) and has one curved portion 12. The structure of the mold can be made simple and simple when it is manufactured by. Further, the parting line of the flanged pipe joint 11 is the outer peripheral surface of the first straight pipe portion 13 and the second straight pipe portion 14, and the center line L1 of the first straight pipe portion 13 and the second straight pipe portion 14. It is preferable to have it on the intersection line with the plane including the center line L2 (that is, the parting surface of the mold of the flanged pipe joint 11 is the center line L1 and the second straight pipe portion of the first straight pipe portion 13. It is preferable that the surface is on a plane (AA cross section in FIG. 4) including the center line L2 of 14. In this way, even if the flange portion 3 is arranged at the end of the pipe portion 2 so as to be inclined with respect to the pipe portion 2, the structure of the mold can be made simple and simple. The plane including the center line L1 of the first straight pipe portion 13 and the center line L2 of the second straight pipe portion 14 does not have to be a strictly flat surface, and may be a substantially flat surface.

(Modified example of the second embodiment)
FIG. 6 is a perspective view and another perspective view of the flanged pipe joint 16 according to the modified example of the second embodiment of the present invention. In the modified example, the bent portion 12 of the flanged pipe joint 16 has an obtuse angle. By making the curved portion 12 an obtuse angle, the pressure loss generated in the curved portion 12 can be reduced. The positional relationship between the first opening 4 and the second opening 5 in the modified example of the second embodiment is the same as the positional relationship between the first opening 4 and the second opening 5 in the second embodiment. The description is omitted. In the second embodiment, the curved portion 12 is substantially a right angle, and in the modified example of the second embodiment, the curved portion 12 has an obtuse angle, but the curved portion 12 may have an acute angle. That is, the angle of the curved portion 12 can be freely designed according to the condition of the external pipe connected by the flanged pipe joint 11.

(Third embodiment)
Subsequently, the flanged pipe joint 21 according to the third embodiment of the present invention will be described with reference to FIGS. 7 to 8. FIG. 7 is a perspective view of a flanged pipe joint according to a third embodiment of the present invention. FIG. 8 is a plan view and a front view of a flanged pipe joint according to a third embodiment of the present invention. It should be noted that substantially the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals. Here, the differences from the second embodiment will be mainly described.

As shown in FIGS. 7 to 8, the flanged pipe joint 21 includes a pipe portion 2 having a curved portion 22 and a flange portion 3. The pipe portion 2 has a circular cross-sectional shape and a curved tubular curved pipe portion 23 whose center line corresponds to one arc, and is shorter than the curved pipe portion 23, and has a circular cross-sectional shape and a reduced diameter portion 25. It has a straight tubular portion 24 having a tubular portion 26, and a straight tubular portion 24. The reduced diameter portion 25 is arranged on the curved pipe portion 23 side. The short tube portion 26 is arranged by a short tube having a uniform outer diameter and inner diameter. Further, the curved pipe portion 23 is provided so as to be inclined with respect to the flange portion 3.

Inside the flanged pipe joint 21, a flow path 6 having a first opening 4 and a second opening 5 is arranged. Like the pipe portion 2, the flow path 6 is provided so as to be inclined with respect to the flange portion 3. Since the positional relationship between the first opening 4 and the second opening 5 in the third embodiment is the same as the positional relationship between the first opening 4 and the second opening 5 in the second embodiment, the description thereof will be omitted. ..

In the flanged pipe joint 21 according to the third embodiment, the pipe portion 2 is provided with a curved pipe portion 23, and the portion (flow path 6a) corresponding to the curved pipe portion 23 of the flow path 6 is a straight pipe of the flow path 6. Most of the parts have a larger diameter than the parts corresponding to the parts 24 (flow path 6b and flow path 6c). By making the flow path 6a larger in diameter than the flow path 6b and the flow path 6c, the pressure loss can be reduced when the fluid flows from the first opening 4 to the second opening 5. The flow path 6 of the flanged pipe joint 21 is formed by a slide core of an injection molding die. In the flow path 6a, the center line of the flow path 6a corresponds to one arc, similarly to the curved pipe portion 23. By doing so, even if the flow path 6a is a curved tube, it can be formed by injection molding. Further, the flow path 6a and the flow path 6b are formed by the same slide core. Since the flow path 6b has a shape in which the diameter is reduced from the first opening 4 side to the second opening 5 side and the length is short, the slide core forming the flow path 6b can be pulled out without interfering with the flow path 6a. it can. Further, in the third embodiment, the size of the radius of the center line of the curved pipe portion 23 and the length of the straight pipe portion 24 can be freely designed. For example, the straight pipe portion 24 is shorter than the curved pipe portion 23, but the straight pipe portion 24 can be made longer than the curved pipe portion 23. Since the operation of the other flanged pipe joint 21 is the same as that of the second embodiment, the description thereof will be omitted.

(Modified example of the third embodiment)
FIG. 9 is a perspective view and another perspective view of the flanged pipe joint 21 according to the modified example of the third embodiment of the present invention. In the modified example, the pipe portion 2 of the flanged pipe joint 27 includes a curved pipe portion 28 whose inner diameter is gradually reduced, and a straight pipe portion 29 whose outer diameter and inner diameter are uniform. The inner diameter of the curved pipe portion 28 is gradually reduced from the first opening 4 to the second opening 5. Further, the straight pipe portion 29 has the same inner diameter and outer diameter as the outer diameter and inner diameter of the end face on the second opening 5 side of the curved pipe portion 28, respectively. The positional relationship between the first opening 4 and the second opening 5 in the modified example of the third embodiment is the same as the positional relationship between the first opening 4 and the second opening 5 in the second embodiment. , The description is omitted.

In each of the first to third embodiments, the flange portion 3 is arranged only at one end of the pipe portion 2, but the other end of the pipe portion 2 also has a flange joint, a socket joint, or the like. Various fittings can be placed. Further, in the first to third embodiments, the second opening 5 and the center line L of the flow path 6 are both orthogonal to each other, but the second opening 5 and the center line L of the flow path 6 are The angle of can be freely designed.

In the present invention, the material of the flanged pipe joints 1, 11 and 21 is not limited to rigid polyvinyl chloride, and can be freely selected according to the usage conditions and fluid properties of the flanged pipe joints 1, 11 and 21. it can. For example, resins such as polypropylene, polyvinylidene fluoride, and polytetrafluoroethylene, metals such as iron, aluminum, and stainless steel, glass, and pottery are suitable materials.

In the present invention, the manufacturing method of the flanged pipe joints 1, 11 and 21 is not limited to injection molding, and can be freely selected according to the shape and material of the flanged pipe joints 1, 11 and 21. For example, compression molding, casting, cutting, molding with a three-dimensional printer, and the like are preferable manufacturing methods.

Preferred embodiments of the present invention are as described above, but the present invention is not limited thereto. Various other embodiments are made that do not deviate from the gist and scope of the present invention. Furthermore, the actions and effects described in this embodiment are examples and do not limit the present invention.

1, 11, 16, 21, 27 Pipe fitting with flange 2 Pipe part 3 Flange part 4 First opening 5 Second opening 6 Flow path 7 Contact surface 8 Chemical bath 9 Flange joint 10 Socket joint 12, 22 Curved part 13th Straight pipe part 14 Second straight pipe part 15 Reinforcement part 23, 28 Curved pipe part 24, 29 Straight pipe part 25 Reduced diameter part 26 Short pipe part L Center line L1 Center line of first straight pipe part L2 Second straight pipe Centerline of the part S1 First virtual plane S2 Second virtual plane S3 Third virtual plane P1 Center point of the first opening P2 Center point of the second opening

Claims (7)

A flanged pipe joint provided with a pipe portion and a flange portion inclined with respect to the pipe portion at one end of the pipe portion, and internally provided with a flow path having a first opening and a second opening. And
The first opening is arranged on the contact surface of the flange portion, the second opening is arranged on the other end of the pipe portion, the first virtual plane including the first opening, and the second opening including the second opening. (Ii) The virtual plane is orthogonal to the virtual plane, the center line of the flow path is inclined with respect to the first opening, and the pipe portion has a straight pipe portion in which the second opening is arranged. A flange characterized in that a third virtual plane that does not include the center of the opening and includes the center of the second opening and the center line of the straight pipe portion is orthogonal to each of the first virtual plane and the second virtual plane. With pipe joint. The flanged pipe joint according to claim 1, wherein the pipe portion further has a curved portion. The pipe portion has a first straight pipe portion and a second straight pipe portion, the flange portion is connected to one end portion of the first straight pipe portion, and the other end portion of the first straight pipe portion. The flanged pipe joint according to claim 2, wherein the bent portion is provided between the second straight pipe portion and one end portion. The flanged pipe joint according to claim 2, wherein the pipe portion further has a curved pipe portion, and the flange portion is connected to one end portion of the curved pipe portion. The flanged pipe joint according to claim 4, wherein the center line of the curved pipe portion corresponds to one arc. The flanged pipe joint according to any one of claims 1 to 5 , wherein the connecting portion between the pipe portion and the flange portion has a reinforcing portion. Claims 1 to 6 include that the pipe portion and the flange portion are integrally molded by injection molding, and the parting surface of the injection molding mold is on a plane including the center line of the pipe portion. The flanged pipe joint according to any one of the above.

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