CN205173755U - Card pressure pipe fitting - Google Patents

Abstract

The utility model discloses a pressing pipe fitting, which solves the technical problem in the prior art that installers cannot judge whether the pressing pipe fitting is leaking or not. The pressing pipe fitting of the utility model includes a pressing pipe, a connecting pipe and a sealing ring , one end of the connecting pipe is inserted into the clamping tube, an annular mounting groove is provided at the socket of the clamping tube and the connecting pipe, the sealing ring is located in the mounting groove, and the outer peripheral side of the sealing ring is in contact with the mounting groove A gap for fluid to pass is provided between the walls, and the press tube is press-connected with the connecting tube to fill the gap. The embodiment of the utility model is mainly applied to the connection of fluid pipelines.

Description

A press fitting

【Technical field】

The utility model relates to a pressing pipe fitting, which belongs to the technical field of pressing pipe fitting processing.

【Background technique】

The working principle of the clamping pipe fitting is to insert the thin-walled metal connecting tube into one end of the clamping tube, and use a special clamping tool to clamp the metal connecting tube in the clamping tube. Since there is an O Type sealing ring, so that it has the characteristics of anti-leakage, anti-drawing, anti-vibration and high-pressure resistance. Therefore, it is a relatively advanced connector in direct drinking water system, tap water system, heating system, steam system, industrial oil pipe system and industrial air pipe system, and is mainly used in the connection of water, oil, gas and other pipelines.

However, at present, when installing some ordinary compression pipe fittings at home and abroad, when the connecting pipe is inserted into the compression pipe, if the operator neglects to perform the compression operation on the compression pipe fittings due to the effect of the sealing ring, in a short period of time The fluid is not easy to leak, so no pressure leakage was found when testing the pressure of the pipeline system, and it was thought that the pipeline system was installed normally, but the phenomenon of fluid leakage will occur after a long time, which will bring great inconvenience to life and production, and cause unnecessary economic costs. Losses, causing conflicts between users, dealers and manufacturers. Therefore, it is necessary to develop a clamping pipe fitting with a leak detection function to detect whether the clamping pipe fitting has been crimped, so as to prevent unpressed clamping pipe fittings from flowing into the hands of users.

【Content of utility model】

The problem to be solved by the utility model is to provide a pressing pipe fitting, which can detect whether the pressing pipe fitting has been pressed through the leakage state of the fluid, and has the characteristics of simple structure.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A clamping pipe fitting, comprising a clamping tube, a connecting tube and a sealing ring, one end of the connecting tube is inserted into the clamping tube, and an annular installation groove is provided at the joint of the clamping tube and the connecting tube, and the sealing ring Located in the mounting groove, there is a gap for fluid to pass between the outer peripheral side of the sealing ring and the wall of the mounting groove, and the pressing pipe is pressed and connected with the connecting pipe to fill the gap.

In the clamping pipe fitting in the utility model, the connecting pipe and the clamping pipe fit together in a gap. Before the clamping pipe fitting is pressed, there is a gap between the sealing ring and the wall of the installation groove, and the fluid in the pressing pipe fitting flows to the pressing pipe fitting through the gap. Leakage occurs on the outside. After the compression pipe fittings are compressed, the outer peripheral side of the sealing ring is pressed against the wall of the installation groove to fill the gap. External leakage. Compared with the prior art, the clamping pipe fitting of the utility model has the characteristics of simple structure. In addition, during the detection process, the installer can detect whether the clamping pipe fitting is compressed by observing whether the fluid leaks, thereby avoiding The unpressed product flows into the hands of the user.

The first specific embodiment: the mounting groove is provided with a boss protruding outward in the radial direction, and the inner wall of the boss and the outer peripheral side of the sealing ring form the gap. Such a design facilitates precise compression processing on the position of the gap in the compression pipe fitting, and improves the sealing effect after compression.

The second specific embodiment: the mounting groove is provided with several bosses. Such a design improves the leakage effect of the fluid and shortens the detection time.

A third specific embodiment: a groove is provided on the outer peripheral side of the sealing ring, and the installation groove wall and the groove wall form the gap. Such a design makes the processing easier.

Fourth specific embodiment: several grooves are provided on the outer peripheral side of the sealing ring. Such a design improves the leakage effect of the fluid and shortens the detection time.

Fifth specific embodiment: the length of the gap is L, and the circumference length of the cross-section of the sealing ring is L1, which satisfies 2/5≤L/L1≤1/2. Such a design can not only ensure that the fluid can leak to the outside of the clamped pipe fitting through the gap, but also improve the sealing effect between the clamped tube and the sealing ring after clamping.

These features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and accompanying drawings.

【Description of drawings】

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the front view of the compression tube in the first embodiment of the utility model;

Fig. 2 is a half-sectional view of the clamping pipe fitting before clamping in Embodiment 1 of the present utility model;

Fig. 3 is a partially enlarged view of A in Fig. 2;

Fig. 4 is the front view of the sealing ring in the second embodiment of the utility model;

Fig. 5 is a half-sectional view of the clamping pipe fitting before clamping in the second embodiment of the utility model;

FIG. 6 is a partially enlarged view of B in FIG. 5 .

【detailed description】

The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present utility model.

The clamping pipe fitting of the utility model includes a clamping tube, a connecting tube and a sealing ring. An annular mounting groove is provided at the joint between the clamping tube and the connecting tube. One end of the connecting tube is inserted into the clamping tube, and the sealing ring is located in the mounting groove. Before pressing the pipe fitting, there is a gap between the sealing ring and the wall of the installation groove for the fluid in the pipe fitting to pass through. After the pipe fitting is pressed, the sealing ring is pressed against the wall of the installation groove to fill the gap.

Embodiment one:

As shown in Figure 1, the pressing pipe fittings include a pressing pipe 1, a connecting pipe 2 and a sealing ring 3. An annular installation groove 11 is provided on the pressing pipe 1, and an annular installation groove 11 is provided on the installation groove 11 along the radial direction. Outer protruding boss 12.

As shown in Figures 2 to 3, it is the structural diagram of the clamping pipe fittings before the clamping after the installation is completed. One end of the connecting tube 2 is inserted into the clamping tube 1, the connecting tube 2 and the clamping tube 1 are in clearance fit, and the installation groove 11 is set At the place where the compression tube 1 and the connecting tube 2 are nested together, the sealing ring 3 is set on the connecting tube 2 and located in the installation groove 11. After the installation is completed, as shown in Figure 3, the space between the two dotted lines in the figure Part of it is the structure of the installation groove 11 without the boss 12. Here, the groove wall of the installation groove 11 is against the outer peripheral side 30 of the sealing ring 3, and the inner peripheral side of the sealing ring 3 is against the connecting pipe 2. Between the two solid lines The middle part is the structure of the boss 12 protruding outward in the radial direction provided by the installation groove 11. The inner wall 121 of the boss 12 and the outer peripheral side 30 of the sealing ring 3 form a gap 4, and the fluid in the compressed pipe passes through the gap 4 and Through the gap between the connecting pipe 2 and the pressing pipe 1, it flows to the port of the pressing pipe 1, so that fluid leakage occurs. On the basis of Figure 3, after the pressing pipe is pressed, the inner wall 121 of the boss 12 It is against the outer ring wall of the sealing ring 3 to fill the gap 4, so that a seal is formed between the sealing ring 3 and the compression tube 1, and the fluid cannot leak outward.

In the prior art, if the operator forgets to press the pressing pipe negligently, due to the effect of the sealing ring, fluid leakage is not easy to occur in a short period of time, so no pressure leakage is found when the pressure of the pipeline system is detected, and it is considered that the pipeline is The installation of the system is normal, but leakage will occur after a long time, which will bring great inconvenience to life and production. However, for the compression pipe fittings of the utility model, the installer can judge whether the compression pipe fittings have passed through by detecting whether the fluid leaks. The crimping process prevents the leaking crimping pipe fittings from flowing into the hands of the user, thereby causing inconvenience to the user. In addition, since the boss 12 corresponds to the gap 4, it is convenient to perform precise crimping processing on the position of the gap 4 in the crimping pipe fitting , improve the sealing effect after pressing.

The length of the gap 4 is L, the circumference length of the cross section of the sealing ring 3 is L1, and 2/5≤L/L1≤1/2, when L/L1<2/5, the upper and lower sides of the inner wall 121 of the boss 12 The two ends are in contact with the sealing ring 3, so that the two ends of the gap 4 are blocked, and the fluid in the pressed pipe cannot flow out of the pressed pipe, so it is impossible to judge whether the pressed pipe has been pressed. When L/L1>1/ 2, the upper and lower ends of the inner wall 121 of the boss 12 are far away from the sealing ring 3. When pressing, it is necessary to apply a relatively large clamping pressure to make the upper and lower ends of the inner wall 121 of the boss 12 offset against the sealing ring 3 In order to prevent the passage of fluid, when the compression is not in place, the fluid will leak during the use of the compression fittings, which will bring inconvenience to the user. When 2/5≤L/L1≤1/2, both can It is ensured that the fluid can pass through the gap 4 so as to leak to the outside of the pressed pipe fitting, and the sealing effect between the pressed pipe 1 and the sealing ring 3 after pressing can be improved.

In other embodiments of the present utility model, in order to improve the effect of fluid leakage and shorten the detection time, several protruding bosses can also be set on the installation groove, and each boss is arranged at intervals along the circumferential direction of the installation groove ; Or in the circumferential direction of the installation groove, an annular boss protruding radially outward is provided.

Embodiment two:

As shown in Figures 4 to 6, a groove 31 is provided on the outer peripheral side 30 of the sealing ring 3. After the pressing pipe is installed and not pressed, the groove wall 311 of the groove 31 and the groove wall 111 of the installation groove 11 The gap 4 is formed, the length of the gap 4 is the opening arc length L of the groove 31 along the circumferential direction of the cross section of the sealing ring 3, the circumferential length of the cross section of the sealing ring 3 is L1, and 2/5≤L/L1≤1/ 2. When L/L1<2/5, the upper and lower ends of the groove 31 are against the groove wall 111 of the installation groove 11, so that the two ends of the gap 4 are blocked, and the fluid in the pressing pipe fitting cannot flow to the pressing pipe fitting In addition, it is impossible to judge whether the crimping pipe has been crimped. When L/L1>1/2, the upper and lower ends of the groove 31 are far away from the groove wall 111 of the installation groove 11. When crimping, it is necessary to apply a relatively large Only a large clamping pressure can make the groove wall 111 and the two ends of the groove 31 resist to prevent the fluid from passing through. If the clamping pressure is small, the sealing effect will be poor. It is inconvenient, when 2/5≤L/L1≤1/2, it can not only ensure that the fluid can pass through the gap 4 and leak to the outside of the compression pipe fitting, but also improve the pressure between the compression tube 1 and the sealing ring 3 after compression Sealing effect. On the basis of Fig. 6, after the clamping pipe is pressed, the groove wall 111 of the installation groove 11 is pressed inward and fills the gap 4. When the groove wall 111 is in contact with the groove wall 311 of the groove 31, the gap 4 is completely closed. Filling, a seal is formed between the sealing ring 3 and the compression tube 1, and the fluid cannot leak outward.

In other embodiments of the present utility model, in order to improve the effect of fluid leakage and shorten the detection time, several grooves can also be set on the sealing ring, and the grooves are arranged at intervals along the circumference of the sealing ring; An annular groove is arranged circumferentially on the outer peripheral side of the ring.

Compared with Embodiment 1, the groove 31 on the sealing ring 3 in the embodiment of the utility model is easy to process, the processing technology is simple, and the processing cost is low.

When the clamping pipe fittings in the two embodiments of the present utility model are clamped, since the clamping pressure acts on the tube wall of the clamping tube 1 and the sealing ring 3 sequentially from the outside to the inside, the clamping corresponding to the installation groove 11 The tube wall of the compression tube 1 first shrinks and deforms inward to narrow the gap 4. Under the continuous extrusion of the clamping pressure, the gap 4 is completely filled. At this time, a seal is formed between the sealing ring 3 and the compression tube 1. Compared with the existing technology, the clamping pipe fitting of the utility model has a good sealing effect after being clamped, and has a simple structure.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, those skilled in the art should understand that the utility model includes but is not limited to the accompanying drawings and the above specific implementation described in the content. Any modifications that do not deviate from the functional and structural principles of the present utility model shall be included in the scope of the claims.

Claims (6)

1. A clamping pipe fitting, comprising a clamping tube, a connecting tube and a sealing ring, one end of the connecting tube is inserted into the clamping tube, and an annular installation groove is provided at the socket of the clamping tube and the connecting tube, so The sealing ring is located in the mounting groove, and it is characterized in that: a gap for fluid to pass is provided between the outer peripheral side of the sealing ring and the wall of the mounting groove, and the pressing pipe is pressed and connected with the connecting pipe to fill the gap. 2. The clamping pipe fitting according to claim 1, characterized in that: the mounting groove is provided with a boss protruding outward in the radial direction, and the inner wall of the boss and the outer peripheral side of the sealing ring form the gap . 3. The clamping pipe fitting according to claim 2, wherein a plurality of said bosses are arranged on said installation groove. 4 . The clamping pipe fitting according to claim 1 , wherein a groove is provided on the outer peripheral side of the sealing ring, and the gap is formed between the installation groove wall and the groove wall. 5 . The pressing pipe fitting according to claim 4 , wherein a plurality of the grooves are provided on the outer peripheral side of the sealing ring. 6 . 6. The clamping pipe fitting according to any one of claims 1 to 5, characterized in that: the length of the gap is L, and the circumference length of the cross-section of the sealing ring is L1, which satisfies 2/5≤L/L1≤ 1/2.