JPH024311Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Purpose of the Invention" The present invention relates to a pipe joint mechanism, and is a joint mechanism that enables expansion and contraction of connected pipe bodies using a joint housing designed to restrain the pipe bodies. form,
The purpose is to facilitate the construction of a series of pipelines, eliminate the causes of damage, and furthermore, to form a variety of joint mechanisms with different functions using the same joint sleeve.

Industrial applications Joint mechanism in pipeline.

BACKGROUND ART In forming a series of pipelines, it is essential to use a joint to connect pipes of a certain length.
As shown in the figure, a packing 11 having a wedge-shaped cross section is inserted between both ends of the sleeve 10 and the pipe body 1 to be connected, and the tail end of the packing 11 is connected to the sleeve 10 by the tightening means 6 via a press ring 24. A device that is pushed in the direction is generally known. That is, according to such a joint mechanism, the pipeline 11 is firmly press-fitted between the pipe body 1 and the tapered receiving portion 12 of the sleeve 10 to form a seal, so that a stable connection relationship can be formed.

Problems to be Solved by the Invention However, while the above-mentioned conventional device provides a mechanically stable connection relationship, the tube body 1 is completely restrained at the joint, and is susceptible to temperature changes and There is a problem with the durability against repeated expansion and contraction of the pipe body during ground movement or vibration, and the packing 11 is caused by the expansion and contraction of the pipe body 1.
is severely damaged and has inferior durability.

Note that a joint mechanism is also known that allows a pipe body connected to a part to expand and contract, but its configuration is similar to that described in the fourth section.
This is fundamentally different from the one in the diagram, and if you try to incorporate it into a series of pipelines, you will have to prepare multiple joints with completely different configurations and select them according to the construction conditions. However, the construction is complicated and costs increase. Furthermore, the connection mechanism obtained with the conventional joint mechanism is the same as long as it is the same joint, and in order to quickly change its elasticity and flexibility to suit the conditions at each site, it is necessary to replace the entire joint mechanism. There must be.

``Structure of the invention'' Means for solving the problems The present invention was devised to solve the problems of the conventional products as described above. a basic joint mechanism consisting of a sleeve configured to accommodate a sleeve, a press ring and a tightening means for fixing the packing accommodated in the receiving portion thereof, and an engaging protrusion fitted into the receiving portion of the sleeve of the basic joint mechanism; A packing comprising an auxiliary ring whose portion is bent to one side and a housing that is pressed against the auxiliary ring by the tightening means, the packing receiving groove formed in the housing having a bore and having a C-shaped cross section. This is a pipe joint mechanism characterized in that it consists of a combination with a replacement joint part that is adapted to be attached.

Function: The basic joint mechanism accommodates the packing in the receiving parts provided at both ends of the sleeve, and tightens the packing with a push ring and tightening means to press the packing against the circumferential surface of the pipe bodies to be connected. A connection state is formed in which the is constrained to a stable state. Further, the auxiliary ring is integrally assembled with the sleeve by fitting the engagement protrusion of the auxiliary ring related to the exchange joint into the packing receiving portion. The C-shaped packing received in the packing receiving groove of the housing, which is pressed against the auxiliary ring by the tightening means, provides a seal between the auxiliary ring and the tube body, and also prevents the fluid pressure of the fluid within the tube from entering the inner cavity. As a result, a sealing action is performed in proportion to the fluid pressure inside the pipe. In this way, cross section C
Since the C-shaped packing has an inner cavity and seals under fluid pressure, the C-shaped packing does not need to be strongly compressed, and the attached tube can be set in a slidable relationship as it expands and contracts. Therefore, there is almost no damage to the packing even when the tube expands and contracts.

Embodiment A concrete embodiment of the present invention will be described with reference to the attached drawings.The joint sleeve and the fastening means used in the present invention are the same as those shown in FIG. A tapered receiving part 12 is formed, and the packing 11 is accommodated in this receiving part 12 as shown in FIG. 4, and a push ring 24 is attached and tightened by the tightening means 6 to form a basic joint mechanism. However, in the present invention, a replacement joint is separately provided for such a sleeve 10. In other words, this exchange joint part has an auxiliary ring 2 formed by bending the engaging protrusion 3 fitted into the tapered receiving part 12 of the sleeve 10 to one side, and a packing receiving groove 14. Using the housing 4,
The receiving groove 14 is provided with an inner cavity 15 and has a cross section C.
A seal receiving groove 18 is formed on the joining surface of the auxiliary ring 2 to the tapered receiving portion 12, and a sealing material 8 such as an O-ring is mounted thereon.

As shown in FIG. 1, the housing 4 is formed of a ring-shaped plate member.
The above-mentioned packing receiving groove 14 is formed in one side surface portion on the inner diameter side of the housing 4 in a partially cut-out state.

The tightening means 6 has locking protrusions 6a integrally formed on both sides of the proximal end, and a nut 7 is screwed into the thread formed at the distal end of the locking protrusion 6a to connect the flange of the sleeve 10 and the press ring 24 or the auxiliary ring 2. As shown in the figure, the housing 4 is tightened with the housing 4 interposed therebetween.

Instead of the packing 11 having a wedge-shaped cross section, the engaging protrusion 3 is fitted and set in the tapered receiving part 12, so that the auxiliary ring 2 is automatically attached to the sleeve 10 by utilizing the inclination of the receiving part 12. It is clear that it is set in an aligned state,
Further, by fitting the auxiliary ring 2 into the sleeve 10 in this way, both the parts 10 and 2 form a substantially stable bonded state.

The joining ends on both sides of the opening of the packing 5 are acute-angled lip portions 5a, and the auxiliary ring 2
In a free state in which the end face of the tube body 1 is not joined to the outer surface of the tube body 1, it is in a state of being inclined and protruding outward as shown by the imaginary line in FIG. As a result, the lip portion 5a is preferentially bonded to the end face of the auxiliary ring 2 and the outer surface of the tube body 1, thereby achieving an effective sealing action. Furthermore, as the fluid pressure within the tube acts on the lumen 15, the sealing action of the lip portion 5a as described above is further pressurized by the fluid pressure, that is, the fluid pressure is used to create a pressure contact proportional to the fluid pressure. A sealing effect can be obtained. Therefore, it is clear that the packing 5 does not need to be particularly strongly pressed against the tube body 1 surface or the auxiliary ring end surface.
Even if the lip portion 5a is in contact with the lip portion 5a, a preferable sealing action using the fluid pressure inside the tube body 1 is realized. This shows that it is possible to slide, and that even if the tubular body 1 slides, the joint surface of the packing 5 will hardly be damaged.

The configuration shown in FIG. 1 as described above is employed at least at one end of the sleeve 10 having tapered receiving portions 12 at both ends. That is, the specific application state is as shown in FIGS. 2 and 3. The one in FIG. 2 is applied to both ends of the sleeve 10, and the one in FIG. 3 is applied to one end of the sleeve 10. The other end has the conventional structure shown in FIG.

As can be understood from these FIGS. 2 and 3 and the above-mentioned FIG. 4, the same sleeve 10 according to the present invention
Three types of pipe joint mechanisms are obtained using the fastening means 6 and the auxiliary ring 2 and the housing 4 with the packing 5 having a C-shaped cross section are the only parts necessary for this purpose. In other words, the two tubes 1 to be connected are connected in such a manner that both tubes are restrained, one of them is restrained and the other is slidable, and both tubes are slidable. Three types of pipe joints with different functions can be easily formed by replacing a few parts depending on the situation at each construction site. In other words, by selecting one of these three types in consideration of vibration conditions caused by vehicle travel, conditions such as ground movement, etc., a preferable pipeline line that immediately responds to the conditions of each construction site is formed. In particular, even if the configuration shown in Figure 1 is adopted at only a few points in a series of pipeline lines, expansion and contraction of the pipe body due to temperature differences etc. will be tolerated in the parts that have the configuration shown in Figure 1. Therefore, in the other parts that adopt the conventional pressure packing configuration shown in Fig. 4, sliding under pressure conditions does not occur between the pipe body and the packing, and the conventional structure also does not. The wear and tear of the packing is eliminated, resulting in high durability.

``Effect of the invention'' According to the invention as explained above, by adding only a few members to the joint sleeve that follows the conventional packing press-fit type, the function is significantly different.
A joint mechanism that allows the pipe body to slide can be obtained, and pipe joints with different performance as appropriate depending on the situation at each construction site can be easily formed with at least the main material intact, and durability can be improved. This invention has great practical and industrial effects because it can provide a high pipeline and its joint mechanism simply and at low cost.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, and Fig. 1 is a partially cutaway side view of one end of the housing of the pipe joint mechanism according to the invention, and Figs. FIG. 4 is a partially cutaway side view showing the general relationship of the joint mechanism thus obtained, and FIG. 4 is a partially cutaway side view of a conventional packing pressure type joint mechanism. In these drawings, 1 is a tube body, 2 is an auxiliary ring, 3 is an engaging protrusion thereof, 4 is a housing, 5 is a packing, 5a is a lip portion thereof, 6 is a tightening means, 7 is a nut, and 8 is a seal. 10 is a sleeve, 11 is a wedge-shaped packing, 12 is a tapered receiving portion, 14 is a packing receiving groove, 15 is an inner cavity of the packing, and 18 is a seal receiving groove.

Claims (1)

[Scope of utility model registration request] A basic joint mechanism consisting of a sleeve in which packing is accommodated in receiving portions arranged opposite to each other at both ends, a push ring and a tightening means for fixing the packing accommodated in the receiving portions, and a sleeve of the basic joint mechanism. an auxiliary ring having an engaging protrusion bent on one side to be fitted into the receiving portion; and a housing that is pressed against the auxiliary ring by the tightening means, and a packing receiving groove formed in the housing. 1. A pipe joint mechanism, characterized in that it is combined with a replacement joint part having a lumen and having a C-shaped cross section attached thereto.