Pipeline retaining internal pressure sealing connection structure, pipe and connecting pipe

Abstract

The utility model discloses a pipeline retaining internal pressure sealing connection structure, pipe and connecting pipe, including pipeline socket and pipeline socket, pipeline socket is inserted in the pipeline socket, and the clearance between pipeline socket and pipeline socket is sleeved with the sealing structure for sealing the clearance, and the sealing structure is used for sealing the pipeline socket and the pipeline socket. And the retaining structure is used for limiting the pipeline inserting opening to retreat from the pipeline bellmouth. And through the matched design of the sealing structure and the retaining structure, the sealing performance is good, and the retaining function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline sealing connection, in particular to a pipeline anti-retraction internal pressure sealing connection structure, a pipe material and a connecting pipe. Background Art

[0002] Water pipes are water supply pipelines. The entire water supply system is composed of multiple water pipes. The common operation when connecting water pipes is to directly plug the sockets and sockets of the two pipes, and install sealing rings at the joints to ensure sealing.

[0003] However, the sealing effect of the traditional water pipe plug-in method is not ideal, and water leakage and seepage are prone to occur. In addition, the connection strength at the plug-in is low and not firm, and it is easy for geological subsidence and temperature drop to cause the pipe to shrink, causing the connection to loosen, withdraw, or fall off, causing water leakage at the interface. Utility Model Content

[0004] In view of the above problems, the utility model provides a pipeline stop-retraction internal pressure sealing connection structure, a pipe material and a connecting pipe which not only have good sealing performance but also have a stop-retraction function.

[0005] The technical solution of the utility model is: a pipeline anti-retraction internal pressure sealing connection structure, including a pipeline socket and a pipeline socket, the pipeline socket is inserted into the pipeline socket, and a sealing structure for sealing the gap is installed in the gap between the pipeline socket and the pipeline socket, and a anti-retraction structure for limiting the withdrawal of the pipeline socket from the pipeline socket.

[0006] The working principle of the above technical solution is as follows:

[0007] Through the coordinated design of the sealing structure and the anti-retraction structure, it not only has good sealing performance, but also has an anti-retraction function.

[0008] In a further technical solution, the sealing structure is sleeved on the inner circumferential wall surface of the pipe socket; the sealing structure is mainly composed of a first sealing ring and a first annular groove, the first annular groove is circumferentially opened on the inner wall surface of the pipe socket, and the first sealing ring is sleeved in the first annular groove; wherein the axial cross section of the first annular groove is in an arc shape. The design of the first sealing ring and the first annular groove can achieve sealing of the gap between the pipe socket and the pipe socket; at the same time, the design of the axial cross section of the first annular groove in an arc shape is conducive to the processing and forming of the first annular groove.

[0009] In a further technical solution, the cross section of the sealing ring is dovetail-shaped. By designing the cross section of the sealing ring to be dovetail-shaped, the sealing effect is further enhanced on the basis of ensuring basic sealing.

[0010] In a further technical solution, the opening port of the pipe socket is arranged in a trumpet shape, and the stop structure is arranged between the inner circumferential wall surface of the opening port of the pipe socket and the outer circumferential wall surface of the corresponding pipe socket, and the stop structure is mainly composed of a second sealing ring, a second annular groove and a barb; the second annular groove is circumferentially opened on the outer circumferential wall surface of the pipe socket, the second sealing ring is sleeved in the second annular groove, and the cross-section of the second sealing ring is wedge-shaped, which is composed of two first right-angled sides and a first hypotenuse; the inner circumferential wall surface of the opening port of the pipe socket The barb is integrally formed on the wall surface, and the cross section of the barb is in the shape of a right triangle, which is composed of two second right-angled sides and a second hypotenuse. During the plug-in process, the first hypotenuse and the second hypotenuse are in a state of facing each other. Under the guidance of the second hypotenuse, the first hypotenuse can cross the second hypotenuse and make the first hypotenuse located between the sealing structure and the second hypotenuse. After the plug-in is completed, the first hypotenuse and the second hypotenuse are in a state of facing each other, and the second hypotenuse limits the first hypotenuse from withdrawing in the direction of the pipe socket. Through the design of the stop-retract structure and the cooperation of the sealing structure and the stop-retract structure, on the one hand, during the plug-in process, the barb of the stop-retract structure cooperates with the wedge-shaped second sealing ring to ensure that the pipe socket can be smoothly inserted into the pipe socket; on the other hand, after the plug-in is completed, the cooperation of the barb of the stop-retract structure and the wedge-shaped second sealing ring can play a stop-retract effect. At the same time, the dovetail-type first sealing ring can also achieve a good sealing effect. The height of the barb is determined according to the actual width of the gap between the pipe socket and the pipe socket, so as to ensure that the pipe socket can be smoothly inserted into the pipe socket and the pipe socket will not be withdrawn from the pipe socket. For example, the height of the barb is half the width of the gap, or two-thirds the width of the gap.

[0011] In order to solve the above-mentioned technical problems, the utility model also provides a technical solution: a pipe, one end of which has a pipe socket and the other end has a pipe socket, the outer peripheral wall surface of the pipe socket is provided with a second annular groove and a second sealing ring as in the above-mentioned pipe stop internal pressure sealing connection structure, and the second sealing ring is sleeved in the second annular groove; the inner peripheral wall surface of the pipe socket is provided with a sealing structure as in any one of the above-mentioned pipe stop internal pressure sealing connection structures, and a barb as in the above-mentioned pipe stop internal pressure sealing connection structure is integrally formed.

[0012] In order to solve the above technical problems, the utility model also provides a technical solution: a connecting pipe, comprising a plurality of pipes as described above, and two adjacent pipes are connected by a pipe stop inner pressure sealing connection structure as described in any of the above items.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the coordinated design of the sealing structure and the anti-retraction structure, it not only has good sealing performance, but also has the anti-retraction function.

[0015] 2. The gap between the pipe spigot and the pipe socket is sealed by designing the first sealing ring and the first annular groove; at the same time, the arc-shaped design of the axial cross-section of the first annular groove facilitates the processing and forming of the first annular groove.

[0016] 3. The cross-section of the sealing ring is designed to be dovetail-shaped, thereby further enhancing the sealing effect while ensuring basic sealing.

[0017] 4. Through the design of the stop-retract structure and the cooperation between the sealing structure and the stop-retract structure, on the one hand, during the plug-in process, the barb of the stop-retract structure cooperates with the wedge-shaped second sealing ring to ensure that the pipe socket can be smoothly inserted into the pipe socket; on the other hand, after the plug-in is completed, the cooperation between the barb of the stop-retract structure and the wedge-shaped second sealing ring can play a stop-retract effect, and at the same time, the dovetail first sealing ring can also achieve a good sealing effect. Among them, the height value of the barb is determined according to the actual width value of the gap between the pipe socket and the pipe socket, so as to ensure that the pipe socket can be smoothly inserted into the pipe socket and ensure that the pipe socket will not withdraw from the pipe socket. For example, the height value of the barb is half the width value of the gap, or the height value of the barb is two-thirds the width value of the gap.

[0018] 5. The opening port of the pipe socket is arranged in a trumpet shape, and the stop structure is designed to be arranged between the inner peripheral wall surface of the opening port of the pipe socket and the corresponding outer peripheral wall surface of the pipe socket. On the one hand, the opening port of the pipe socket is arranged in a trumpet shape, which plays a guiding role and facilitates the plugging of the pipe socket and the pipe socket; on the other hand, the stop structure is arranged at the opening port of the pipe socket, so that after the pipe socket and the pipe socket are plugged in, the pipe socket can expand and contract within the plugging range defined between the tail of the pipe socket and the stop structure, and has a certain expansion margin.

[0019] 6. The arc-shaped design of the axial cross section of the first annular groove facilitates the processing and forming of the first annular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the pipeline anti-retraction internal pressure sealing connection structure described in Example 1 of the utility model.

[0021] Description of reference numerals:

[0022] 1—pipe socket; 2—pipe socket; 3—sealing structure; 31—first sealing ring; 32—first annular groove; 4—stop structure; 41—second sealing ring; 42—second annular groove; 43—barb. DETAILED DESCRIPTION

[0023] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, a pipeline anti-retraction internal pressure sealing connection structure includes a pipeline socket 1 and a pipeline socket 2, wherein the pipeline socket 1 is inserted into the pipeline socket 2, and a sealing structure 3 for sealing the gap is sleeved (set) in the gap between the pipeline socket 1 and the pipeline socket 2, as well as a anti-retraction structure 4 for limiting the withdrawal of the pipeline socket 1 from the pipeline socket 2.

[0026] The working principle of the above technical solution is as follows:

[0027] Through the coordinated design of the sealing structure 3 and the anti-retraction structure 4, not only good sealing performance but also an anti-retraction function is achieved.

[0028] In another embodiment, the sealing structure 3 is sleeved on the inner circumferential wall surface of the pipe socket 2; the sealing structure 3 is mainly composed of a first sealing ring 31 and a first annular groove 32, the inner wall surface of the pipe socket 2 is circumferentially provided with the first annular groove 32, and the first sealing ring 31 is sleeved in the first annular groove 32. The design of the first sealing ring 31 and the first annular groove 32 realizes the sealing of the gap between the pipe socket 1 and the pipe socket 2; wherein the axial cross section of the first annular groove 32 is in an arc shape; at the same time, the design of the axial cross section of the first annular groove in an arc shape is conducive to the processing and forming of the first annular groove. In order to enhance the sealing effect, at least one of the sealing structures 3 is arranged in the gap between the pipe socket 1 and the pipe socket 2. For example, there are three sealing structures 3 arranged in the gap between the pipe socket 1 and the pipe socket 2, and the distance between two adjacent sealing structures 3 gradually increases toward the pipe socket 2 along the direction.

[0029] In another embodiment, the cross section of the sealing ring is dovetail-shaped. The design of the cross section of the sealing ring being dovetail-shaped further enhances the sealing effect while ensuring basic sealing.

[0030] In another embodiment, the opening port of the pipe socket 2 is configured to be a trumpet shape, and the stop structure 4 is provided between the inner circumferential wall surface of the opening port of the pipe socket 2 and the corresponding outer circumferential wall surface of the pipe socket 1, and the stop structure 4 is mainly composed of a second sealing ring 41, a second annular groove 42 and a barb 43; the second annular groove 42 is circumferentially opened on the outer circumferential wall surface of the pipe socket 1, the second sealing ring 41 is sleeved in the second annular groove 42, and the cross-section of the second sealing ring 41 is wedge-shaped, which is composed of two first right-angled sides and a first hypotenuse; the barb is integrally formed on the inner circumferential wall surface of the opening port of the pipe socket 2, and the cross-section of the barb 43 is a right-angled triangle shape, which is composed of two second right-angled sides and a second hypotenuse, during the plug-in process. In the embodiment, the first bevel and the second bevel are in a state of facing each other, and under the guidance of the second bevel, the first bevel can cross over the second bevel (that is, under the guidance of the second bevel, the annular gap between the second bevel and the pipe socket 1 through which the second sealing ring 41 passes for insertion gradually becomes smaller, and the volume of the second sealing ring 41 is also compressed and becomes smaller, until the second sealing ring 41 passes through the gap between the second bevel and the pipe socket 1, and finally the volume of the second sealing ring 41 returns to its original shape.), and the first bevel is located between the sealing structure 3 and the second bevel; after the insertion is completed, the first bevel and the second bevel are in a state of facing each other, and the second bevel limits the first bevel from withdrawing toward the mouth of the pipe socket 2. Through the design of the stop structure 4 and the cooperation between the sealing structure 3 and the stop structure 4, on the one hand, during the plug-in process, the barb 43 of the stop structure 4 cooperates with the wedge-shaped second sealing ring 41 to ensure that the pipe socket 1 can be smoothly inserted into the pipe socket 2; on the other hand, after the plug-in is completed, the cooperation between the barb 43 of the stop structure 4 and the wedge-shaped second sealing ring 41 can play a stop effect, and at the same time, the dovetail first sealing ring 31 can also achieve a good sealing effect (such as Figure 1 As shown, after the socket and the spigot are assembled, the dovetail-type first sealing ring 31 is in an inclined state. ). The height value of the barb 43 is determined according to the actual width value of the gap between the pipe spigot 1 and the pipe socket 2, so as to ensure that the pipe spigot 1 can be smoothly inserted into the pipe socket 2 and that the pipe spigot 1 will not be withdrawn from the pipe socket 2. For example, the height value of the barb 43 is half the width value of the gap, or the height value of the barb 43 is two-thirds the width value of the gap.

[0031] Embodiment 2:

[0032] In order to solve the above-mentioned technical problems, the utility model also provides a technical solution: a pipe, one end of which has a pipe socket and the other end of which has a pipe socket, the outer peripheral wall surface of the pipe socket is provided with a second annular groove and a second sealing ring as in a pipe stop-retreat internal pressure sealing connection structure of the above-mentioned embodiment 1, and the second sealing ring is sleeved in the second annular groove; the inner peripheral wall surface of the pipe socket is provided with a sealing structure as in a pipe stop-retreat internal pressure sealing connection structure described in any one of the above-mentioned embodiments 1, and a barb integrally formed as in a pipe stop-retreat internal pressure sealing connection structure of the above-mentioned embodiment 1.

[0033] Embodiment 3:

[0034] In order to solve the above technical problems, the utility model also provides a technical solution: a connecting pipe, comprising a plurality of pipes as described in the above embodiment 2, and two adjacent pipes are connected by a pipe stop internal pressure sealing connection structure as described in any one of the above embodiment 1.

[0035] Embodiment 4:

[0036] The other structures of this embodiment 4 are the same as those of embodiments 1, 2 and / or 3, except that the inner diameter value d of the pipe socket located between the first annular groove and the barb is 1 smaller than the minimum inner diameter d of the pipe socket between the barb and the pipe socket edge 2 , and the inner diameter value d of the pipe socket between the first annular groove and the barb 1 Greater than the outer diameter D of the pipe socket 1 For example, d 1 Equal to 0.7 times d 2 , and 0.7 times d 1 Equal to D 1 By changing the inner diameter of the pipe socket, the second sealing ring can effectively perform a secondary sealing function after the plugging process (the first sealing ring is used for the first sealing function) on the basis of ensuring that the second sealing ring passes through the barb during the plugging process, thereby improving the sealing performance of the pipe stop inner pressure sealing connection structure.

[0037] In addition, in order to improve the connection stability of the first sealing ring in the first annular groove, a snap-fit ​​connection can be formed between the bottom surface of the first sealing ring and the inner bottom surface of the first annular groove (for example, the bottom surface of the first sealing ring has a "T"-shaped protrusion, and the inner bottom surface of the first annular groove is provided with a "T"-shaped recess that matches the "T"-shaped protrusion.); in order to improve the connection stability of the second sealing ring in the second annular groove, a snap-fit ​​connection can be formed between the bottom surface of the second sealing ring and the inner bottom surface of the second annular groove (for example, the bottom surface of the second sealing ring has a "T"-shaped protrusion, and the inner bottom surface of the second annular groove is provided with a "T"-shaped recess that matches the "T"-shaped protrusion.).

[0038] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A pipeline stop inner pressure sealing connection structure, characterized in that: The invention comprises a pipe socket and a pipe socket, wherein the pipe socket is inserted into the pipe socket, and a sealing structure for sealing the gap and a stop structure for limiting the withdrawal of the pipe socket from the pipe socket are installed in the gap between the pipe socket and the pipe socket; The sealing structure is sleeved on the inner circumferential wall surface of the pipe socket; The sealing structure is mainly composed of a first sealing ring and a first annular groove. The first annular groove is circumferentially opened on the inner wall surface of the pipe socket, and the first sealing ring is sleeved in the first annular groove; wherein the axial cross section of the first annular groove is in an arc shape; The cross section of the sealing ring is dovetail-shaped; The opening port of the pipe socket is arranged in a bell-mouth shape, and the stop structure is arranged between the inner peripheral wall surface of the opening port of the pipe socket and the outer peripheral wall surface of the corresponding pipe socket, and the stop structure is mainly composed of a second sealing ring, a second annular groove and a barb; The outer peripheral wall surface of the pipe socket is provided with the second annular groove in the circumferential direction, the second sealing ring is sleeved in the second annular groove, and the cross section of the second sealing ring is wedge-shaped, which is composed of two first right-angled sides and a first oblique side; The barb is integrally formed on the inner peripheral wall surface of the opening port of the pipe socket, and the cross section of the barb is in the shape of a right triangle, which is composed of two second right-angled sides and a second hypotenuse. During the plugging process, the first bevel and the second bevel are in a state of facing each other, and under the guidance of the second bevel, the first bevel can cross over the second bevel and be located between the sealing structure and the second bevel; After the splicing is completed, the first bevel and the second bevel are in a state of facing each other, and the second bevel limits the first bevel from withdrawing in the direction of the mouth edge of the pipe socket.

2. A pipe, characterized in that: One end of the pipe has a pipe socket, and the other end has a pipe socket. The outer peripheral wall surface of the pipe socket is provided with a second annular groove and a second sealing ring in the pipe stop inner pressure sealing connection structure as claimed in claim 1, and the second sealing ring is sleeved in the second annular groove; The inner circumferential wall surface of the pipe socket is provided with a sealing structure in the pipe stop internal pressure sealing connection structure as claimed in claim 1, and a barb in the pipe stop internal pressure sealing connection structure as claimed in claim 1 is integrally formed.

3. A connecting pipe, characterized in that: It comprises a plurality of pipes as claimed in claim 2, and two adjacent pipes are connected by a pipe stop inner pressure sealing connection structure as claimed in claim 1.

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