JP3165136U - Detachable pipe joint with C-shaped snap ring without nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To significantly reduce the cost of a pipe joint while maintaining the tensile stress, pressure resistance, seismic resistance, resistance to expansion and contraction due to temperature change, etc. required for the pipe joint, in addition to being easy to install and easy to remove. It provides a removable pipe joint with a nutless C-shaped snap ring that is capable. SOLUTION: The connected pipe 1 is composed of a C-shaped snap ring, at least one leakage prevention packing, and a pipe joint 4. At the joint end of the connected pipe, a recessed roll groove for fitting the C-shaped snap ring is provided, and the C-shaped snap ring is arranged in the gradually contracting converging compression joint wall of the pipe joint, and at least one. The two leak-proof packings are arranged in the corresponding packing grooves provided in the pipe joint, and the end edges of the pipe joints are provided with symmetrically arranged through-hole grooves 40. [Selection diagram] Fig. 1

Description

The present invention relates to a detachable pipe joint with a C-shaped snap ring that does not require a nut. In particular, it is easy to install, easy to remove and fast, and depends on the tensile stress, pressure resistance, earthquake resistance, and temperature changes required for the pipe joint. The present invention relates to a pipe joint that can significantly reduce the cost of the pipe joint while maintaining resistance to expansion and contraction.

FIG. 7 shows a conventional pipe joint structure and function. In this figure, an example in which the connection pipe A1 is combined with the three-way joint A2 will be described. The three-way joint A2 includes a male screw portion A21 at the upper end, and is screwed with the female screw cap A3. When the connection pipe A1 is inserted into the inner hole of the male screw portion A21, a basic leakage prevention function can be achieved by providing the leakage prevention packing A4 between the top edges of both. Further, a metal gasket A5 is fitted on the outer side of the connection pipe A1 above the leakage prevention packing A4. When the female screw cap A3 is screwed using the metal gasket A5, pressure is applied and the lower leakage prevention packing A4 is pressed, and the leakage prevention packing A4 is deformed to fix the connection pipe A1.

If the structure of the conventional pipe joint mentioned above is understood, the following will be understood. The metal gasket A5 and the leakage prevention packing A4 play a triple role of compression bonding, fixing, and leakage prevention in the entire joint combination. However, after a pipe tensile test, the tensile strength between the two connecting pipes was clearly weak. The main problem is that all the fixing and leak prevention depend on the leak-proof packing A4. Therefore, if the leak-proof packing A4 is used for a long time to be deformed or the leak-proof packing A4 is not sufficiently compressed, the leak-proof packing A4 is attached, and if it is distorted and twisted, There is a possibility of damaging the leak-proof packing A4. In particular, when the tensile force is increased at the locations that are tightly coupled to prevent leakage, the connected pipe A1 as a whole may be pulled out or may be pulled out significantly to move its position. This phenomenon is the greatest fatal injury in connecting pipes, and it often causes bleeding and cracking of the pipe. Thus, conventional pipe joints do not achieve basic demand targets.

  Therefore, the present invention is easy to install and easy to remove, and also reduces the cost of the pipe joint while maintaining the tensile stress, pressure resistance, earthquake resistance, and resistance to expansion and contraction caused by temperature changes. An object is to provide a removable pipe joint with a nut-free C-shaped snap ring that can be greatly lowered.

  The removable pipe joint having a nut-free C-type snap ring according to the present invention includes a pipe to be connected, a C-type snap ring, at least one leakage prevention packing, and a pipe joint. The joint end of the pipe to be connected is provided with a recessed roll groove for fitting the C-type snap ring, and the C-type snap ring is a ring having a tear, and the clearance portion of the tear is reduced and expanded. The C-shaped snap ring is disposed in the gradually compressing convergent compression joint wall of the pipe joint, and at least one leak-proof packing is disposed in a corresponding packing groove provided in the pipe joint. It has an edge stop diameter, the edge stop diameter is smaller than the inner diameter of the converging compression joint wall that gradually shrinks, and a symmetrically disposed through hole groove is provided at the end edge of the pipe joint, and a C-type is provided in the pipe joint A gradually converging constriction compression joining wall for placing the snap ring is provided, and at least one leak-proof packing is provided below the converging compression joining wall. Packing groove to respond is provided.

  In the present invention, the C-type snap ring is completely fitted in the pipe to be connected, thereby assisting the leak-proof packing and preventing it from being damaged when subjected to external vibration or being pulled. The compression joining force of the leak-proof packing can be maintained. It also achieves four functions: tensile stress, pressure resistance, earthquake resistance, and resistance to expansion and contraction due to temperature changes.

It is the perspective view which showed the external appearance of the best Example of this invention. It is the exploded structure figure showing each member of the present invention. It is structural sectional drawing which showed the whole combination of this invention. It is explanatory drawing which showed the function of three persons of the to-be-connected pipe of this invention, a C-shaped snap ring, and a leakage prevention packing. It is sectional drawing which showed another Example of the leakage prevention packing of this invention. It is the enlarged view which showed the structure of the frame part of FIG. It is sectional drawing which showed the whole structure of the conventional pipe joint.

As shown in FIGS. 1 and 2, the present invention mainly includes a connected pipe 1, a C-shaped snap ring 2, at least one leakage prevention packing 3, and a pipe joint 4. Among them, a recessed roll groove 11 for fitting the C-shaped snap ring 2 is provided at the joining end of the connected pipe 1. In addition, since the end edge of the pipe 1 to be connected is processed into a chamfered shape 12 and is easy to attach, the end edge does not become a sharp blade, so that at least one leak-proof packing 3 disposed inside is provided. It can be prevented from being damaged. The C-type snap ring 2 attached to the roll groove 11 is a ring having a tear 21, and the ring 2 can be expanded and contracted by the clearance of the tear 21. As a result, when the C-type snap ring 2 is mounted in the pipe joint 4 together with the connected pipe 1, the C-type snap ring 2 is first shrunk and enters the pipe joint 4, and then opens. Engage with the joint 4.

As shown in FIG. 2, symmetrically disposed through-hole grooves 40 are provided at the edge of the pipe joint 4 described above, and the symmetrically disposed through-hole grooves 40 are combined into two. When the pipe detaching tool 5 of this type is sandwiched together, the diameter of the C-shaped snap ring 2 provided inside the pipe joint 4 is reduced and removed by the pipe detachment convex part 51 provided at the inner edge of the pipe detaching tool 5. be able to. With the above structure, the present invention can be removed and used repeatedly. The diameter when the C-shaped snap ring is contracted is smaller than the diameter of the opening of the pipe joint 4 so that the entire pipe joint 4 can be attached and detached. In addition, the present invention can be implemented by using other tools for the above-described pipe removing device 5 on the premise that the device is removed and repeatedly used, and the method is not limited. Any tool may be used as long as it has the ability to reduce the diameter of the C-shaped snap ring 2 from the symmetrically arranged through-hole grooves 40.

Subsequently, as shown in FIG. 3 and FIG. 4, a converging compression bonding wall 41 that gradually shrinks for disposing the C-shaped snap ring 2 is provided on the inner edge of the connection pipe of the pipe joint 4. The convergent compression joining wall 41 employs a convergent structure that gradually shrinks, and the joint end has an edge stop diameter 41-1, which is smaller than the inner diameter of the convergent compression join wall 41. Briefly speaking, the constriction compression bonding wall 41 causes the C-type snap ring 2 to enter the converging compression bonding wall 41 by tensile stress as the C-type snap ring 2 and the pipe 1 to be connected are fitted, and C The mold snap ring 2 is tightly fitted into the roll groove 11 of the connected pipe 1 in a contracted state. At that time, the C snap ring 2 is restricted by the edge stop diameter 41-1 of the joint end and is difficult to come out. Become. As described above, the function of fitting the ring into the connected pipe 1 can be achieved.

By connecting the connected pipe 1, the C-shaped snap ring 2, and the pipe joint 4 together, the connected pipe 1 is firmly positioned, and the at least one leakage prevention packing 3 disposed below the connected pipe 1 is also the same. Due to the phenomenon that the pipes 1 are firmly positioned and the connected pipe 1 is stretched and deviated in position, each leakage prevention packing 3 is not distorted to leak or be damaged. Further, when each leakage prevention packing 3 is fitted into the outer wall of the pipe 1 to be connected, each leakage prevention packing 3 is arranged in a packing groove 42 provided in the pipe joint 4 to achieve air sealing and leakage prevention effects. be able to.

Regarding the optimum size of the at least one leakage prevention packing 3 described above, the inner diameter of the leakage prevention packing 3 is smaller than the outer diameter of the connected pipe 1. After being attached, each leak-proof packing 3 is pressed and joined to the connected pipe 1 by a small compression clearance B. As described above, the action of the combination of the C-shaped snap ring 2, at least one leakage prevention packing 3, and the pipe joint 4 causes the connected pipe to vibrate a little, cause expansion and contraction due to temperature change, and tension. When undesired external environment effects such as stress or momentary pressure are applied, the connected pipe 1, the C-type snap ring 2, and each leakage prevention packing 3 have the ability to prevent leakage. It can be held, and can exhibit practical effects such as strong pressure resistance, earthquake resistance, and heat and cold resistance.

Moreover, as shown in FIG. 5 and FIG. 6, the leak-proof packing 3 can have a structure having a clear groove passage without changing the gist of the present invention. The leakage preventing packing 3 has a contact edge 31 at the top edge of the cross section, the inner contact edge 31 contacts the connected pipe 1, the outer contact edge 31 contacts the packing groove 42 of the pipe joint, A clear groove passage 32 is provided in the center. With the above structure, when the leak-proof packing 3 is subjected to a large internal pressure, the clearance of the leak-proof packing 3 expands, and a necessary compression bonding tension is applied.

DESCRIPTION OF SYMBOLS 1 Connected pipe 11 Roll groove 12 Chamfered shape 2 C-type snap ring 21 Rupture 3 Leak prevention packing 31 Contact edge
32 Clear groove passage 4 Pipe joint 40 Through-hole groove 41 Convergence compression bonding wall 41-1 Edge stop diameter 42 Packing groove 5 Pipe removal tool 51 Pipe removal convex part B Compression clearance

Claims (5)

A detachable pipe joint comprising a connected pipe, a C-shaped snap ring, at least one leak-proof packing, and a pipe joint, and having a nut-free C-shaped snap ring,
The joint end of the pipe to be connected is provided with a recessed roll groove for fitting a C-shaped snap ring,
The C-type snap ring is a ring having a slit, and by expanding and contracting the clearance portion of the slit, the C-type snap ring is arranged in the gradually compressing convergent compression joint wall of the pipe joint,
At least one leak-proof packing is arranged in a corresponding packing groove provided in the pipe joint;
The end of the pipe joint has an edge stop diameter, which is smaller than the inner diameter of the convergent compression joint wall that gradually shrinks. Is provided with a gradually shrinking converging compression joining wall for arranging a C-shaped snap ring, and a packing groove corresponding to at least one leakage preventing packing is provided under the converging compression joining wall. Detachable pipe joint with nut-free C-shaped snap ring. 2. The nut-free C-type snap ring according to claim 1, wherein the through-hole grooves arranged symmetrically at the edge of the pipe joint correspond to a C-type snap ring attached to the inside of the pipe joint. Removable pipe joint with The removable pipe joint with a nut-free C-shaped snap ring according to claim 1, wherein the end edge of the connected pipe is processed into a chamfered shape. 2. The removable pipe joint with a nut-free C-shaped snap ring according to claim 1, wherein an inner diameter of the leak-proof packing is smaller than an outer diameter of the connected pipe. 2. The nut-free C-shaped snap according to claim 1, wherein the leak-proof packing has an inner contact edge and an outer contact edge at a top edge thereof, and a clearance groove passage is provided at a central portion thereof. Detachable pipe joint with ring.

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