Rapid pressure test joint

Abstract

The utility model discloses a rapid pressure test joint, which comprises a joint body, a pipeline connecting piece, an O-shaped sealing ring and a locking finger wheel, the joint body is of a tubular structure and comprises external threads arranged on the joint body, a through channel, a near end and a far end, an inner conical sealing surface is arranged on one side, close to the near end, of the through channel, and the inner conical sealing surface has a first perimeter; the first perimeter is reduced from the near end to the far end; the pipeline connecting piece comprises a fluid channel, a first end and a second end, the fluid channel and the penetrating channel are coaxially arranged, the first end is inserted into the penetrating channel, the second end is connected with a to-be-tested pipeline, a groove is annularly formed in the peripheral wall, close to the inner conical sealing face, of the pipeline connecting piece, and the groove and the inner conical sealing face form a containing cavity used for containing the O-shaped sealing ring; the locking finger wheel is in threaded connection with the connector body so that the inner conical sealing face can tightly press the O-shaped sealing ring to form sealing. The testing device is simple in structure and convenient to assemble, and meets the requirement for quick disassembly and quick assembly during a large number of tests.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline engineering, and particularly relates to a quick pressure test joint for a pressure pipeline. Background Art

[0002] The purpose of pressure testing a pipeline is to check whether the strength and tightness of the installed pipeline system meet the design requirements.

[0003] When pressure testing a pipeline, generally, a pressure test conduit is inserted into the end of the pipeline, and the pressure test conduit is then connected to a pressure pump. The pressure pump pressurizes the pressure test conduit and makes the pressure reach inside the pipeline, thereby achieving the purpose of pipeline pressure testing. The existing ferrule type pressure test joint is as shown in the appendix Figure 1 , including a ferrule joint connected to the pipeline, a ferrule for sealing, and a nut for pressing the ferrule. Among them, the ferrule made of metal material has the advantages of strong gripping force, high pressure resistance, and resistance to high and low temperature changes. However, the metal ferrule is a one-time connection and locking, with relatively high operation professionalism and low error tolerance; in addition, because all components are made of metal material, the surface of the ferrule is easily scratched during the assembly process, resulting in a decrease in the sealing performance of the joint, and using a nut for fixation requires special tools, resulting in a time-consuming and laborious connection process, with low efficiency and high scrap rate for a large number of pipeline factory tests. Summary of the Invention

[0004] In order to overcome the above defects, the utility model provides a quick pressure test joint, which has a simple structure, low manufacturing cost, and can achieve quick connection with the pipeline, with high efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to provide a quick pressure test joint, including:

[0006] A joint body, the joint body is a tubular structure, including an external thread provided on the outer periphery of the joint body, a through channel axially arranged along the joint body, and a proximal end and a distal end. An inner conical sealing surface is provided on one side of the through channel close to the proximal end. The inner conical sealing surface has a first circumference, and the first circumference decreases from the proximal end to the distal end direction;

[0007] A pipeline connector, the pipeline connector includes a fluid channel coaxially arranged with the through channel, and a first end and a second end. The first end is inserted into the through channel, and the second end is connected to the pipeline to be tested. A groove is provided on the outer peripheral wall of the pipeline connector close to the inner conical sealing surface, and the groove and the inner conical sealing surface form a receiving cavity for receiving an O-ring;

[0008] A locking finger wheel, which has a hand-held portion and an internal thread that mates with the external thread of the joint body. The locking finger wheel is connected to the joint body so that the inner conical sealing surface presses against the O-ring.

[0009] As a further improvement of the present utility model, the angle of the inner conical sealing surface relative to the central axis of the through channel is between 10 degrees and 30 degrees.

[0010] As a further improvement of the present utility model, the outer peripheral wall of the pipe connector has a first part adjacent to the groove and facing the first end, and a second part adjacent to the groove and facing the second end. The first part extends to terminate at the first end, and the first part and the second part have outer diameters;

[0011] Wherein, the outer diameter of the first part is consistent with the inner diameter of the through channel, the outer diameter of the second part is consistent with the outer diameter of the joint body, and the first part and the second part are transitionally connected through the groove.

[0012] As a further improvement of the present utility model, the outer peripheral wall of the pipe connector has a third part adjacent to the second part and facing the second end. The third part extends to terminate at the second end, and the third part has an outer diameter;

[0013] Wherein, the outer diameter of the third part is smaller than the outer diameter of the second part and larger than the outer diameter of the first part; the third part and the second part are transitionally connected through a shoulder.

[0014] As a further improvement of the present utility model, a conical guiding surface is provided on one side of the first part close to the first end, and the conical guiding surface has a second circumference, and the second circumference decreases from the second end to the first end direction.

[0015] As a further improvement of the present utility model, the locking finger wheel has a mounting hole coaxially arranged with the internal thread, and the mounting hole is configured to receive the second part and at least one section of the third part close to the second part;

[0016] The remaining part of the third part is placed outside the locking finger wheel for connection with the pipeline to be tested.

[0017] As a further improvement of the present utility model, an anti-slip structure is provided on the outer peripheral surface of the hand-held portion of the locking finger wheel.

[0018] As a further improvement of the present utility model, the O-ring is made of rubber material; the locking finger wheel is made of one of brass, stainless steel, nickel-based alloy or titanium alloy.

[0019] The beneficial effects of the present utility model are as follows: The quick pressure test joint provided by the present utility model is composed of a joint body, a pipe connector, an O-ring seal, and a locking finger wheel. It has a simple structure and is convenient to assemble, which is conducive to the quick disassembly and assembly requirements during a large number of tests. By mutually cooperating the pipe connector and the O-ring seal with the joint body and using the locking finger wheel for locking and sealing, not only is there no need to prepare a special locking tool, but also the self-characteristics of the O-ring seal endow it with the ability to be reused multiple times, with low cost and good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional view of an existing ferrule type pressure test joint;

[0021] Figure 2 is a schematic structural view of the present utility model;

[0022] Figure 3 is a schematic cross-sectional view of the present utility model in the A-A direction;

[0023] Figure 4 of the present utility model Figure 3 is an exploded structural view of the schematic cross-sectional view;

[0024] Figure 5 is a schematic structural view of the pipe connector of the present utility model.

[0025] The following description is made in conjunction with the accompanying drawings:

[0026] 1. Joint body; 11. External thread; 12. Through channel; 121. Inner conical sealing surface; 13. Proximal end; 14. Distal end; 2. Pipe connector; 21. Fluid channel; 22. First end; 23. Second end; 24. Groove; 25. First part; 251. Conical guiding surface; 26. Second part; 261. Shoulder; 27. Third part; 3. O-ring seal; 4. Accommodation cavity; 5. Locking finger wheel; 51. Hand-held part; 52. Internal thread; 53. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following describes in detail a preferred embodiment of the present utility model in conjunction with the accompanying drawings.

[0028] Refer to Figures 2 to 5 , the quick pressure test joint provided by the present utility model includes a joint body 1, a pipe connector 2, an O-ring seal 3, and a locking finger wheel 5.

[0029] Among them, the joint body 1 is a tubular structure, including an external thread 11 provided on the outer periphery of the joint body 1, a through channel 12 axially arranged along the joint body 1, and a proximal end 13 and a distal end 14. On one side of the through channel 12 close to the proximal end 13, there is an inner conical sealing surface 121. The inner conical sealing surface 121 has a first perimeter, and the first perimeter decreases in the direction from the proximal end 13 to the distal end 14; the angle of the inner conical sealing surface 121 relative to the central axis 0' of the through channel 12 is between 10 degrees and 30 degrees, and more preferably has an angle of 20 degrees. The pressure pump is connected to one side of the distal end 14, and the pipe connector 2 is connected to one side of the proximal end 13.

[0030] The pipe connector 2 includes a fluid channel 21 coaxially arranged with the through channel 12, and a first end 22 and a second end 23. Among them, the end close to the joint body 1 is the first end 22, and the end far from the joint body 1 is the second end 23. The outer surface of the pipe connector 2 is preferably smooth and preferably has a circular perimeter. The first end 22 of the pipe connector 2 is inserted into the through channel 12, and the second end 23 is connected to the pipe to be tested. A groove 24 is provided on the outer peripheral wall of the pipe connector 2 close to the inner conical sealing surface 121. The groove 24 is configured to receive the O-ring 3. And when the first end 22 of the pipe connector 2 is connected to the joint body 1, the groove 24 and the inner conical sealing surface 121 form a receiving cavity 4 for accommodating the O-ring 3. The O-ring 3 in the receiving cavity 4 provides a seal around the pipe connector 2. Therefore, it is obvious that the cross-sectional perimeter of the O-ring 3 is greater than the cross-sectional perimeter of the receiving cavity 4. Thus, when the cross-sectional perimeter of the receiving cavity 4 becomes smaller, the O-ring 3 will be compressed, that is, the seal is achieved.

[0031] Furthermore, on the outer peripheral wall of the pipe connector 2, there is a first part 25 adjacent to the groove 24 and facing the first end 22, and a second part 26 adjacent to the groove 24 and facing the second end 23. The first part 25 extends to the first end 22 and terminates there. A conical guiding surface 251 is provided on one side of the first part 25 close to the first end 22, and the conical guiding surface 251 has a second perimeter, and the second perimeter decreases in the direction from the second end 23 to the first end 22. The conical guiding surface 251 provides guidance to facilitate the connection of the pipe connector 2 to the joint body 1.

[0032] Further, the first part 25 and the second part 26 have outer diameters, and the outer surfaces are preferably smooth; the outer diameter of the first part 25 is consistent with the inner diameter of the through-channel 12, that is, the outer surface of the first part 25 abuts against the smooth inner surface of the through-channel 12. The outer diameter of the second part 26 is consistent with the outer diameter of the joint body 1, and the first part 25 and the second part 26 are transitionally connected through a groove 24. That is, the two opposite end faces of the second part 26 and the first part 25 form two side wall portions of the groove 24. At the same time, the radial dimension of the side wall portion formed by the first part 25 is smaller than the radial dimension of the side wall portion formed by the second part 26. In addition, the bottom of the groove 24 has a smooth surface. One end face of the second part 26 facing the proximal end 13 of the joint body 1 abuts against the end face of the proximal end 13 of the joint body 1 to form a receiving cavity 4 for receiving the O-ring 3, and also limits the connection depth between the pipe connector 2 and the joint body 1.

[0033] Further, on the outer peripheral wall of the pipe connector 2, there is a third part 27 adjacent to the second part 26 and facing the second end 23. The third part 27 extends to terminate at the second end 23. The outer surface of the third part is smooth and has a circular circumference. The third part 27 has an outer diameter, and the outer diameter of the third part 27 on the side close to the second end 23 can be set according to the outer diameter of the pipe to be tested, so as to be applicable to the use of pipes to be tested with different specifications.

[0034] Among them, the outer diameter of the third part 27 is smaller than the outer diameter of the second part 26 and larger than the outer diameter of the first part 25; the third part 27 and the second part 26 are transitionally connected through a shoulder 261, that is, the circumference of the shoulder 261 decreases from the proximal end to the distal end direction.

[0035] Further, the locking finger ring 5 has a hand-held part 51 and an internal thread 52 that cooperates with the external thread 11 of the joint body 1. The locking finger ring 4 is connected to the joint body 1 so that the inner conical sealing surface 121 presses the O-ring 3.

[0036] In addition, the locking finger ring 5 has a mounting hole 53 coaxially arranged with the internal thread 52. The mounting hole 53 is configured to receive the second part 26 and at least a section of the third part 27 adjacent to the second part 26. Among them, the locking finger ring 5 is of a cylindrical structure. It can be understood that its radial dimension is set to facilitate the user's finger gripping, and it should be larger than the radial dimension of the nut in the prior art. A through hole is axially opened in the middle of the locking finger ring 5, and the through hole is configured to have an internal thread 52 for mating connection with the external thread 11 of the joint body 1, and a mounting hole 53 connected to the end of the internal thread 52. The mounting hole 53 has a smooth inner surface. In addition, based on the outer diameters of the second part 26 and the third part 23, the mounting hole 53 is a stepped hole, and the aperture on the side close to the internal thread 52 is large and its structure is adapted to the second part 26. The remaining part of the third part 27 (that is, the side close to the second end 23 mentioned above) is placed outside the locking finger ring 5 for connection with the pipeline to be tested. In addition, an anti-slip structure is provided on the outer wall surface of the locking finger ring 5, such as a rhombic outer wall surface (similar to a hexagonal nut), or as shown in Figure 2 the knurling shown, so as to facilitate the user's gripping and prevent slipping when the user rotates manually.

[0037] Furthermore, the O-ring 3 is made of rubber material; the locking finger ring 5 is made of one of brass, stainless steel, nickel-based alloy or titanium alloy.

[0038] According to the above features, the assembly process of the present utility model is as follows:

[0039] Step 1: Slip the O-ring 3 onto the groove 24 of the pipeline connector 2 to obtain a fitting.

[0040] Step 2: Insert the first end 22 of the fitting obtained in Step 1 into the joint body 1.

[0041] Step 3: Hold the locking finger ring 5 and insert it from one side of the second end 23 of the pipeline connector 2. When the internal thread 52 of the locking finger ring 5 contacts the external thread 11 of the joint body 1, rotate the locking finger ring 5 to lock it onto the joint body 1. During the locking process of the locking finger ring 5, the proximal end 13 of the joint body 1 deforms towards the central axis direction to compress the O-ring 3, realizing the seal between the joint body 1 and the pipeline connector 2. At this time, the assembly of the pressure test joint is completed.

[0042] When a pressure test needs to be performed on the pipeline, connect the pressure pump to the joint body 1 of the pressure test joint, and connect the pipeline to be tested to the second end 23 of the pipeline connector 2. The pipeline connection is convenient, fast and efficient.

[0043] The quick pressure test joint provided by the utility model is composed of a joint body, a pipe connector, an O-ring and a locking finger ring. It has a simple structure and is convenient to assemble, which is conducive to the quick disassembly and assembly requirements needed for a large number of tests. By matching the pipe connector and the O-ring with the joint body and using the locking finger ring for locking and sealing, not only is there no need to prepare a proprietary locking tool, but also the self-characteristics of the O-ring endow it with the ability to be reused multiple times, with low cost and good sealing effect.

[0044] Many specific details have been set forth in the above description to facilitate a full understanding of the utility model. However, the above description is only a preferred embodiment of the utility model, and the utility model can be implemented in many other ways different from those described herein. Therefore, the utility model is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the utility model by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. All simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A quick pressure test connector, characterized in that: include: A joint body (1), the joint body (1) being a tubular structure, comprising an external thread (11) provided on the outer periphery of the joint body (1), a through channel (12) provided along the axial direction of the joint body (1), and a proximal end (13) and a distal end (14), wherein an inner conical sealing surface (121) is provided on a side of the through channel (12) close to the proximal end (13), and the inner conical sealing surface (121) has a first circumference, and the first circumference decreases in a direction from the proximal end (13) to the distal end (14); A pipe connector (2), the pipe connector (2) comprising a fluid channel (21) coaxially arranged with the through channel (12), and a first end (22) and a second end (23), the first end (22) being inserted into the through channel (12), the second end (23) being connected to the pipe to be tested, a groove (24) being arranged on the outer peripheral wall of the pipe connector (2) near the inner conical sealing surface (121), the groove (24) and the inner conical sealing surface (121) forming a receiving cavity (4) for receiving an O-ring (3); A locking thumbwheel (5), the locking thumbwheel (5) having a hand-held portion (51) and an internal thread (52) that matches the external thread (11) of the connector body (1), the locking thumbwheel (5) being connected to the connector body (1) so that the inner conical sealing surface (121) presses the O-ring (3).

2. The quick pressure test connector according to claim 1, characterized in that: The angle of the inner conical sealing surface (121) relative to the central axis of the through-channel (12) is between 10 degrees and 30 degrees.

3. The quick pressure test connector according to claim 1, characterized in that: The outer peripheral wall of the pipe connector (2) comprises a first portion (25) adjacent to the groove (24) and arranged toward the first end (22), and a second portion (26) adjacent to the groove (24) and arranged toward the second end (23), the first portion (25) extending to the first end (22) and terminating, the first portion (25) and the second portion (26) having an outer diameter; The outer diameter of the first part (25) is consistent with the inner diameter of the through channel (12), the outer diameter of the second part (26) is consistent with the outer diameter of the joint body (1), and the first part (25) and the second part (26) are transitionally connected via the groove (24).

4. The quick pressure test connector according to claim 3, characterized in that: The pipe connector (2) has a third portion (27) on its outer peripheral wall, which is adjacent to the second portion (26) and faces the second end (23), and the third portion (27) extends to the second end (23) and terminates there. The third portion (27) has an outer diameter. The outer diameter of the third part (27) is smaller than the outer diameter of the second part (26) and larger than the outer diameter of the first part (25); the third part (27) and the second part (26) are transitionally connected via a shoulder (261).

5. The quick pressure test connector according to claim 4, characterized in that: A conical guide surface (251) is provided on one side of the first portion (25) close to the first end (22), and the conical guide surface (251) has a second circumference, and the second circumference decreases in a direction from the second end (23) to the first end (22).

6. The quick pressure test connector according to claim 4, characterized in that: The locking finger wheel (5) has a mounting hole (53) coaxially arranged with the internal thread (52), and the mounting hole (53) is configured to receive the second part (26) and at least a section of the third part (27) close to the second part (26); The remaining part of the third portion (27) is placed outside the locking finger wheel (5) for connection with the pipeline to be tested.

7. The quick pressure test connector according to claim 1, characterized in that: The outer peripheral surface of the hand-held portion (51) of the locking finger wheel (5) is provided with an anti-slip structure.

8. The quick pressure test connector according to claim 1, characterized in that: The O-shaped sealing ring (3) is made of rubber material; the locking finger wheel (5) is made of a material selected from the group consisting of brass, stainless steel, nickel-based alloy or titanium alloy.

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