Pipeline pressing leak detection device

Abstract

The invention provides a pipeline pressing leak detection device, and belongs to the technical field of pipeline detection devices. The pipeline pressurizing leak detection device comprises a first manipulator, a second manipulator and a valve, one end of a detected pipeline can be hermetically clamped by the first manipulator, the other end of the detected pipeline can be hermetically clamped by the second manipulator, and a medium output end of the valve is communicated with an accommodating space in the detected pipeline. The detection medium can be conveyed to the containing space of the detected pipeline, and whether the detected pipeline leaks or not is judged by detecting whether the medium leaks in the containing space of the detected pipeline or not. Whether a conventional pipeline, a pipe fitting and a metal hose have leakage points or not is unknown, hidden dangers are large when the conventional pipeline, the pipe fitting and the metal hose are installed in a system, leakage detection needs to be carried out before installation, a joint for leakage detection needs to be welded and needs to be cut off after leakage detection is completed, and the leakage detection process is complex. According to the pressing leak detection device, the detected pipeline is clamped by the two manipulators, leak detection of the detected pipeline can be completed without welding a leak detection joint, and the pressing leak detection device is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection devices, and particularly to a pipeline pressure testing and leak detection device. Background Art

[0002] For conventional pipelines, pipe fittings, and metal hoses, it is unknown whether there are leakage points. Installing them into the system poses a greater hidden danger, and leak detection needs to be carried out before installation. Conventional leak detection requires welding joints for leak detection, and after leak detection is completed, they need to be cut off, and the leak detection process is complex. Summary of the Invention

[0003] In view of this, the present invention provides a pipeline pressure testing and leak detection device, which uses two manipulators to clamp the pipeline to be inspected, and can complete the leak detection of the pipeline to be inspected without welding joints for leak detection, and is convenient to use, thus being more suitable for practical applications.

[0004] In order to achieve the above object, the technical solution of the pipeline pressure testing and leak detection device provided by the present invention is as follows:

[0005] The pipeline pressure testing and leak detection device provided by the present invention includes a first manipulator (M), a second manipulator (N), and a valve.

[0006] One end of the pipeline to be inspected (5) can be hermetically clamped by the first manipulator (M), and the other end of the pipeline to be inspected (5) can be hermetically clamped by the second manipulator (N).

[0007] The medium output end of the valve is communicated with the accommodation space inside the pipeline to be inspected (5). Through the valve, a detection medium can be conveyed into the accommodation space of the pipeline to be inspected (5), and whether the pipeline to be inspected (5) leaks is judged by whether there is leakage of the detection medium in the accommodation space of the pipeline to be inspected (5).

[0008] The pipeline pressure testing and leak detection device provided by the present invention can also be further realized by adopting the following technical measures.

[0009] Preferably, the pipeline pressure testing and leak detection device further includes a connecting seat.

[0010] The first manipulator (M) and the second manipulator (N) are respectively fixedly connected to the connecting seat.

[0011] Preferably, the pipeline pressure testing and leak detection device further includes a hinge (2) and a buckle (3).

[0012] The connecting seat includes a first connecting seat (1) and a second connecting seat (4).

[0013] The first manipulator (M) is connected to the second connecting seat (4), and the second manipulator (N) is connected to the first connecting seat (1).

[0014] One side of the first connecting seat (1) and the second connecting seat (4) is connected together by the hinge (2), so that the first connecting seat (1) and the second connecting seat (4) can rotate around the hinge (2);

[0015] The other sides of the first connecting seat (1) and the second connecting seat (4) are detachably connected together by the buckle (3), so that when the first connecting seat (1) and the second connecting seat (4) are connected into one body by the buckle (3), the first manipulator (M) and the second manipulator (N) can clamp the straight pipeline under inspection (5); and when the other sides of the first connecting seat (1) and the second connecting seat (4) are not connected into one body by the buckle (3), the first manipulator (M) and the second manipulator (N) can clamp the pipeline under inspection (5) presenting a set angle, wherein the included angle presented by the pipeline under inspection (5) is equal to the included angle between the first connecting seat (1) and the second connecting seat (5).

[0016] Preferably,

[0017] A second limiting groove (21) and a third limiting groove (49) are formed on the first connecting seat (1),

[0018] A first limiting groove (20) and a fourth limiting groove (48) are formed on the second connecting seat (4),

[0019] The first manipulator (M) can linearly move on the second connecting seat (4) along the first limiting groove (20) and the fourth limiting groove (48) of the second connecting seat (4);

[0020] The second manipulator (N) can linearly move on the first connecting seat (1) along the second limiting groove (21) and the third limiting groove (49) of the first connecting seat (1).

[0021] Preferably,

[0022] The first manipulator (M) includes a first pipeline clamping mechanism, and / or the second manipulator (N) includes a second pipeline clamping mechanism;

[0023] The first pipeline clamping mechanism provides a first through hole,

[0024] One end of the pipeline under inspection (5) passes through the first through hole and the free end is sealed;

[0025] The second pipeline clamping mechanism provides a second through hole (45),

[0026] The other end of the pipeline under inspection (5) passes through the second through hole and the free end is sealed.

[0027] Preferably,

[0028] The first pipeline clamping mechanism includes a first pipe clamp (15), a second pipe clamp (16) and a first fixture (14),

[0029] A first semi-circular hole is formed in the lower side of the first pipe clamp (15), and a second semi-circular hole is formed in the upper side of the second pipe clamp (16). When the first pipe clamp (15) and the second pipe clamp (16) are joined together by the first fixture (14), the first semi-circular hole and the second semi-circular hole jointly provide the first through hole;

[0030] The second pipeline clamping mechanism includes a third pipe clamp (29), a fourth pipe clamp (30) and a second fixture (38),

[0031] A third semi-circular hole is formed in the lower side of the third pipe clamp (29), and a fourth semi-circular hole is formed in the upper side of the fourth pipe clamp (30). When the third pipe clamp (29) and the fourth pipe clamp (30) are joined together by the second fixture (38), the third semi-circular hole and the fourth semi-circular hole jointly provide the second through hole.

[0032] Preferably, the pipeline pressure testing and leak detection device further includes a first connector (6), a first bottom connector (17), a second connector (7) and a second bottom connector (32),

[0033] The first manipulator (M) is connected to the second connecting seat (4) through the first connector (6), and the first bottom connector (17) is fixedly connected to the first connector (6);

[0034] The second manipulator (N) is connected to the first connecting seat (1) through the second connector (7), and the second bottom connector (32) is fixedly connected to the second connector (7);

[0035] The second pipe clamp (16) is connected to the first bottom connector (17),

[0036] The fourth pipe clamp (30) is connected to the second bottom connector (32).

[0037] Preferably, the pipeline pressure testing and leak detection device further includes a first boss, a first limit block, a second boss and a second limit block (59),

[0038] The first boss is fixedly connected to the bottom of the second pipe clamp (16), such that the first boss forms a first flange (18) and a second flange (76) axially relative to the second pipe clamp (16) at the bottom, and the first boss forms a first limiting step and a second limiting step radially relative to the second pipe clamp (16) at the bottom; the first limiting block is fixedly connected to the bottom of the first boss;

[0039] The second boss is fixedly connected to the bottom of the fourth pipe clamp (30), such that the second boss forms a third flange (31) and a fourth flange (35) axially relative to the fourth pipe clamp (30) at the bottom, and the first boss forms a third limiting step and a fourth limiting step radially relative to the fourth pipe clamp (30) at the bottom; the second limiting block (59) is fixedly connected to the bottom of the second boss;

[0040] The first bottom connecting member (17) is provided with a first accommodating hole, the first accommodating hole is a first stepped hole, the first stepped hole includes a first section hole and a second section hole, a first limiting boss and a second limiting boss are formed on the opening side of the first stepped hole, the radial dimension of the second section hole is smaller than that of the first section hole, the first section hole is adapted to the shape of the first boss, and the second section hole is adapted to the shape of the first limiting block;

[0041] The second bottom connecting member (32) is provided with a second accommodating hole, the second accommodating hole is a second stepped hole, the second stepped hole includes a third section hole (64) and a fourth section hole (65), a third limiting boss (62) and a fourth limiting boss (63) are formed on the opening side of the second stepped hole, the radial dimension of the fourth section hole (65) is smaller than that of the third section hole (64), the third section hole (64) is adapted to the shape of the second boss, and the fourth section hole (65) is adapted to the shape of the second limiting block (59);

[0042] The first clamp (14) is pressed on the top of the first pipe clamp (15), and a first hook (19) is formed at the free end of the first clamping arm (39) of the first clamp (14), and a second hook (77) is formed at the free end of the second clamping arm (40) of the first clamp (14), the first hook (19) abuts against the bottom of the first flange (18), and the second hook (77) abuts against the bottom of the second flange (76);

[0043] The second clamp (38) is pressed on top of the third pipe clamp (29). Moreover, a third hook (34) is formed at the free end of the third clamping arm (28) of the second clamp (38), and a fourth hook (36) is formed at the free end of the fourth clamping arm (37) of the second clamp (38). The third hook (34) abuts against the bottom of the third flange (31), and the fourth hook (36) abuts against the bottom of the fourth flange (35).

[0044] Preferably, the pipeline pressure testing and leak detection device further includes a first raised point, a second raised point, a third raised point (41), and a fourth raised point (42).

[0045] The first raised point and the second raised point are arranged at the bottom of the horizontal arm of the first clamp (14) and on top of the first pipe clamp (15). A first recessed point is arranged at a position corresponding to the first raised point, and a second recessed point is arranged at a position corresponding to the second raised point. The first recessed point is adapted to the first raised point, and the second recessed point is adapted to the second raised point.

[0046] The third raised point (41) and the fourth raised point (42) are arranged at the bottom of the horizontal arm of the second clamp (38) and on top of the third pipe clamp (29). A third recessed point (60) is arranged at a position corresponding to the third raised point (41), and a fourth recessed point (61) is arranged at a position corresponding to the fourth raised point (42). The third recessed point (60) is adapted to the third raised point (41), and the fourth recessed point (61) is adapted to the fourth raised point (42).

[0047] Preferably, the pipeline pressure testing and leak detection device further includes a first set screw (12), a second set screw (13), a third set screw (26), and a fourth set screw (27).

[0048] The horizontal arm of the first clamp (14) is provided with a first screw hole and a second screw hole. The foot of the first set screw (12) passes through the first screw hole and abuts against the top of the first pipe clamp (15), and the foot of the second set screw (13) passes through the second screw hole and abuts against the top of the first pipe clamp (15).

[0049] The horizontal arm of the second clamp (38) is provided with a third screw hole and a fourth screw hole. The foot of the third set screw (26) passes through the third screw hole and abuts against the top of the third pipe clamp (29), and the foot of the fourth set screw (27) passes through the fourth screw hole and abuts against the top of the third pipe clamp (29).

[0050] Preferably, the pipeline pressure test and leak detection device further includes a third connecting member (8), a first lead screw (10), a first lead screw penetrating shaft (55), a fourth connecting member (24), a second lead screw (23), and a second lead screw penetrating shaft (58).

[0051] The third connecting member (8) includes a first horizontal portion and a first vertical portion. The first vertical portion is fixedly connected to the first horizontal portion, and the first horizontal portion is fixedly connected to the first connecting member (6). The first lead screw penetrating shaft (55) is fixedly arranged on the first vertical portion through an eighth connecting member (69). After one end of the first lead screw (10) passes through the through hole of the first lead screw penetrating shaft (55), it clamps one end of the pipeline under test (5).

[0052] The fourth connecting member (24) includes a second horizontal portion and a second vertical portion. The second vertical portion is fixedly connected to the second horizontal portion, and the second horizontal portion is fixedly connected to the second connecting member (7). The second lead screw penetrating shaft (58) is fixedly arranged on the second vertical portion through a sixth connecting member (50). After one end of the second lead screw (23) passes through the through hole of the second lead screw penetrating shaft (58), it clamps the other end of the pipeline under test (5).

[0053] Preferably, the pipeline pressure test and leak detection device further includes a first pipe plug (54) and a second pipe plug (53).

[0054] One end of the first pipe plug (54) is fixedly connected to the first lead screw (10) for clamping one end of the pipeline under test (5), and the other end of the first pipe plug (54) fills one end of the pipeline under test (5).

[0055] One end of the second pipe plug (53) is fixedly connected to the second lead screw (23) for clamping one end of the pipeline under test (5), and the other end of the second pipe plug (53) fills the other end of the pipeline under test (5).

[0056] The medium output end is arranged on the first pipe plug (54) and the second pipe plug (53).

[0057] Preferably, the pipeline pressure test and leak detection device further includes a first support member (11) and a second support member (25).

[0058] The first pipe plug (54) is fixedly arranged on the first support member (11).

[0059] The second pipe plug (53) is fixedly arranged on the second support member (25).

[0060] Preferably,

[0061] The first pipe plug (54) is in the shape of a first cone, and the first pipe plug (54) is stuffed into one end of the pipeline under inspection (5) through its side with a smaller diameter;

[0062] The second pipe plug (53) is in the shape of a second cone, and the second pipe plug (53) is stuffed into the other end of the pipeline under inspection (5) through its side with a smaller diameter.

[0063] Preferably, the pipeline pressure test leak detection device further includes a third screw rod threading shaft (57), a first limit bushing (46), a fifth connecting piece (47), a fourth screw rod threading shaft (56), a second limit bushing (51) and a seventh connecting piece (52),

[0064] The third screw rod threading shaft (57) is arranged on the first support member (11) through the first limit bushing (46) and the fifth connecting piece (47), and the first screw rod (10) also passes through the third screw rod threading shaft (57);

[0065] The fourth screw rod threading shaft (56) is arranged on the second support member (25) through the second limit bushing (51) and the seventh connecting piece (52), and the second screw rod (23) also passes through the fourth screw rod threading shaft (56).

[0066] Preferably, the valve includes a first needle valve (44), a first pressure pipe, a second needle valve (33) and a second pressure pipe (68),

[0067] A first needle valve accommodation groove is provided on the first support member (11), the first needle valve (44) is arranged on the first needle valve accommodation groove through its foot, a first medium accommodation hole is arranged in the first needle valve (44), a second medium accommodation hole and a seventh medium accommodation hole are provided on the first support member, the first pressure pipe is fixedly arranged inside the first pipe plug (54), a fourth medium accommodation hole is arranged inside the second pressure pipe, and the first pressure port, the first medium accommodation hole, the second medium accommodation hole, the third medium accommodation hole and the fourth medium accommodation hole of the first needle valve (44) are communicated with each other and are also communicated with the inside of the pipeline under inspection (5);

[0068] The second support member (25) is provided with a second needle valve accommodation groove (71), the second needle valve (33) is arranged in the second needle valve accommodation groove (71) through its foot portion, a fifth medium accommodation hole (72) is arranged in the second needle valve (33), a sixth medium accommodation hole (73) and a seventh medium accommodation hole (74) are provided on the second support member (25), the second pressure pipe (68) is fixedly arranged inside the second pipe plug (53), and an eighth medium accommodation hole (75) is arranged inside the second pressure pipe (68). The second pressure port (70), the fifth medium accommodation hole (72), the sixth medium accommodation hole (73), the seventh medium accommodation hole (74) and the eighth medium accommodation hole (75) of the second needle valve (33) are communicated with each other and are also communicated with the inside of the pipeline under inspection (5).

[0069] Preferably, the pipeline pressure testing and leakage detection device further includes a first handwheel (9) and a second handwheel (2).

[0070] The output shaft of the first handwheel (9) is fixedly connected to the first lead screw (10).

[0071] The output shaft of the second handwheel (22) is fixedly connected to the second lead screw (23).

[0072] Preferably

[0073] Chamfers are machined on both sides of the bottom of the first limit block

[0074] Chamfers are machined on both sides of the bottom of the second limit block (59).

[0075] The pipeline pressure testing and leakage detection device provided by the present invention uses the first manipulator M and the second manipulator N to clamp the pipeline under inspection 5, and then, the detection medium is conveyed into the accommodation space inside the pipeline under inspection 5 through the detection medium output end of the valve, so as to judge whether the pipeline under inspection 5 has leakage. Among them, when the pipeline under inspection 5 has leakage, the detection medium will leak from the leakage point. On the contrary, if the pipeline under inspection 5 has no leakage, the detection medium will not leak from the pipeline under inspection 5. After the detection, the first manipulator M and the second manipulator N can be removed from the pipeline under inspection 5. Therefore, the pipeline pressure testing and leakage detection device provided by the embodiment of the present invention is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0077] Appendix Figure 1Schematic diagram of the connection structure in the first typical direction after the pipeline pressure test leak detection device provided by the embodiment of the present invention is combined with the pipeline under test, where the pipeline under test is a straight pipe;

[0078] Appendix Figure 2 Schematic diagram of the connection structure in the second typical direction after the pipeline pressure test leak detection device provided by the embodiment of the present invention is combined with the pipeline under test, where the pipeline under test is a straight pipe;

[0079] Appendix Figure 3 Schematic diagram of the connection structure in the third typical direction after the pipeline pressure test leak detection device provided by the embodiment of the present invention is combined with the pipeline under test, where the pipeline under test is a straight pipe;

[0080] Appendix Figure 4 It is the appendix Figure 3 Partial enlarged structure schematic diagram of part A in the appendix;

[0081] Appendix Figure 5 Stereoscopic structure schematic diagram of the pipeline pressure test clamping mechanism applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in the first typical direction;

[0082] Appendix Figure 6 Stereoscopic structure schematic diagram of the pipeline pressure test clamping mechanism applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in the second typical direction;

[0083] Appendix Figure 7 Stereoscopic structure schematic diagram of the first fixture applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in a typical direction;

[0084] Appendix Figure 8 Stereoscopic structure schematic diagram of the structure obtained by the cooperation between the first pipe clamp, the second pipe clamp, and the bottom connecting piece applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in a typical direction;

[0085] Appendix Figure 9 Stereoscopic structure schematic diagram of the structure obtained by the cooperation between the first pipe clamp and the second pipe clamp applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in a typical direction;

[0086] Appendix Figure 10 Stereoscopic structure schematic diagram of the bottom connecting piece applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in a typical direction;

[0087] Appendix Figure 11 Schematic diagram of the structure of the pressure test mechanism applied in the pipeline pressure test leak detection device provided by the embodiment of the present invention in a typical direction;

[0088] Appendix Figure 12 It is the appendix Figure 11 Cross-sectional view taken along the line B-B of the appendix;

[0089] Description of Reference Numerals:

[0090] 1 - First connecting seat, 2 - Hinge, 3 - Lock catch, 4 - Second connecting seat, 5 - Pipeline under inspection, 6 - First connecting member, 7 - Second connecting member, 8 - Third connecting member, 9 - First handwheel, 10 - First lead screw, 11 - First support member, 12 - First set screw, 13 - Second set screw, 14 - First clamp, 15 - First pipe clamp, 16 - Second pipe clamp, 17 - First bottom connecting member, 18 - First flange, 19 - First hook, 20 - First limiting groove, 21 - Second limiting groove, 22 - Second handwheel, 23 - Second lead screw, 24 - Fourth connecting member, 25 - Second support member, 26 - Third set screw, 27 - Fourth set screw, 28 - Third clamping arm, 29 - Third pipe clamp, 30 - Fourth pipe clamp, 31 - Third flange, 32 - Second bottom connecting member, 33 - Second needle valve, 34 - Third hook, 35 - Fourth flange, 36 - Fourth hook, 37 - Fourth clamping arm, 38 - Second clamp, 39 - First clamping arm, 40 - Second clamping arm, 41 - Third convex starting point position, 42 - Fourth convex starting point position, 43 - Fourth lead screw shaft, 44 - First needle valve, 45 - Second through hole, 46 - First limiting shaft sleeve, 47 - Fifth connecting member, 48 - Fourth limiting groove, 49 - Third limiting groove, 50 - Sixth connecting member, 51 - Second limiting shaft sleeve, 52 - Seventh connecting member, 53 - Second pipe plug, 54 - First pipe plug, 55 - First lead screw passing shaft, 56 - Fourth lead screw passing shaft, 57 - Third lead screw passing shaft, 58 - Second lead screw passing shaft, 59 - Second limiting block, 60 - Third concave point position, 61 - Fourth concave point position, 62 - Third limiting boss, 63 - Fourth limiting boss, 64 - Third limiting accommodating groove, 65 - Fourth limiting accommodating groove, 66 - Second gasket, 67 - Second locking nut, 68 - Second pressure pipe, 69 - Eighth connecting member, 70 - Second pressure port, 71 - Second needle valve accommodating groove, 72 - Fifth medium accommodating hole, 73 - Sixth medium accommodating hole, 74 - Seventh medium accommodating hole, 75 - Eighth medium accommodating hole, 76 - Second flange, 77 - Second hook, M - First manipulator, N - Second manipulator. Detailed Embodiment

[0091] In view of this, the present invention provides a pipeline pressure test and leak detection device, which uses two manipulators to clamp the pipeline under inspection, and can complete the leak detection of the pipeline under inspection without welding leak detection joints, and is convenient to use, so it is more suitable for practical application.

[0092] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manner, structure, features and effects of a pipeline pressure test leak detection device proposed according to the present invention. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0093] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B is specifically understood as: it can include both A and B at the same time, A can exist alone, or B can exist alone, and it can have any one of the above three situations.

[0094] See attached Figure 1 - attached Figure 12 The pipeline pressure test leak detection device provided by the embodiment of the present invention includes a first manipulator M, a second manipulator N and a valve. One end of the pipeline 5 to be inspected can be hermetically clamped by the first manipulator M, and the other end of the pipeline 5 to be inspected can be hermetically clamped by the second manipulator N. The medium output end of the valve is communicated with the accommodation space in the pipeline 5 to be inspected. Through the valve, a detection medium can be conveyed into the accommodation space of the pipeline 5 to be inspected. By determining whether there is leakage of the detection medium in the accommodation space of the pipeline 5 to be inspected, it can be judged whether the pipeline 5 to be inspected leaks.

[0095] The pipeline pressure test leak detection device provided by the embodiment of the present invention uses the first manipulator M and the second manipulator N to clamp the pipeline 5 to be inspected. Then, by conveying the detection medium into the accommodation space of the pipeline 5 to be inspected through the detection medium output end of the valve, it can be judged whether the pipeline 5 to be inspected leaks. Among them, when the pipeline 5 to be inspected leaks, the detection medium will leak from the leakage point. On the contrary, if the pipeline 5 to be inspected does not leak, the detection medium will not leak from the pipeline 5 to be inspected. After the inspection, the first manipulator M and the second manipulator N can be removed from the pipeline 5 to be inspected. Therefore, the pipeline pressure test leak detection device provided by the embodiment of the present invention is more convenient to use.

[0096] Among them, the pipeline pressure test leak detection device provided by the embodiment of the present invention further includes a connecting seat. The first manipulator M and the second manipulator N are respectively fixedly connected to the connecting seat. In this case, the first manipulator M and the second manipulator N can be fixed on the connecting seat, and there is no need to hold the first manipulator M and the second manipulator N by hand. Therefore, it can be made that the pipeline pressure test leak detection device provided by the embodiment of the present invention can clamp the pipeline 5 to be inspected by itself using the connecting seat, the first manipulator M and the second manipulator N during the application process, and the application is more convenient.

[0097] Among them, the pipeline pressure test leak detection device provided by the embodiments of the present invention further includes a hinge 2 and a buckle 3. The connecting seat includes a first connecting seat 1 and a second connecting seat 4. The first manipulator M is connected to the second connecting seat 4, and the second manipulator N is connected to the first connecting seat 1. One side of the first connecting seat 1 and the second connecting seat 4 is connected together by a hinge 2, so that the first connecting seat 1 and the second connecting seat 4 can rotate around the hinge 2 as the rotation center. The other side of the first connecting seat 1 and the second connecting seat 4 is detachably connected together by a buckle 3. When the first connecting seat 1 and the second connecting seat 4 are connected into one body by the buckle 3, the first manipulator M and the second manipulator N can clamp the straight pipeline 5 to be inspected; when the other side of the first connecting seat 1 and the second connecting seat 4 is not connected into one body by the buckle 3, the first manipulator M and the second manipulator N can clamp the pipeline 5 to be inspected at a set angle, where the included angle presented by the pipeline 5 to be inspected is equal to the included angle between the first connecting seat 1 and the second connecting seat 5. In this case, the first manipulator M and the second manipulator N clamp the pipeline 5 to be inspected at a set angle by using the first connecting seat 1, the second connecting seat 4, the hinge 2, the buckle 3, etc. For the pipeline 5 to be inspected bent at a set angle, it has a better clamping effect, so that the pipeline pressure test leak detection device provided by the embodiments of the present invention has a wider application range.

[0098] Among them, a second limit groove 21 and a third limit groove 49 are formed on the first connecting seat 1. A first limit groove 20 and a fourth limit groove 48 are formed on the second connecting seat 4. The first manipulator M can linearly move on the second connecting seat 4 along the first limit groove 20 and the fourth limit groove 48 of the second connecting seat 4. The second manipulator N can linearly move on the first connecting seat 1 along the second limit groove 21 and the third limit groove 49 of the first connecting seat 1. In this case, the first manipulator M can linearly move on the second connecting seat 4 by using the first limit groove 20 and the fourth limit groove 48, and the second manipulator N can move on the first connecting seat 1 by using the second limit groove 21 and the third limit groove 49, so as to change the distance between the first manipulator M and the second manipulator N. Therefore, the pipeline pressure test leak detection device provided by the embodiments of the present invention can be adapted to pipelines 5 to be inspected with different lengths, and has a wider application range.

[0099] Among them, the first manipulator M includes a first pipeline clamping mechanism, and / or the second manipulator N includes a second pipeline clamping mechanism. The first pipeline clamping mechanism provides a first through hole, and the free end of one end of the pipeline 5 to be inspected passing through the first through hole is sealed. The second pipeline clamping mechanism provides a second through hole 45, and the free end of the other end of the pipeline 5 to be inspected passing through the second through hole is sealed. In this case, the first manipulator M clamps one end of the pipeline 5 to be inspected through the first pipeline clamping mechanism, and the second manipulator N clamps the other end of the pipeline 5 to be inspected through the second pipeline clamping mechanism, which can make the clamping effect of the first manipulator M and the second manipulator N on the pipeline 5 to be inspected more stable.

[0100] Among them, the first pipeline clamping mechanism includes a first pipe clamp 15, a second pipe clamp 16 and a first fixture 14. A first semi-circular hole is provided on the lower side of the first pipe clamp 15, and a second semi-circular hole is provided on the upper side of the second pipe clamp 16. When the first pipe clamp 15 and the second pipe clamp 16 are joined together by the first fixture 14, the first semi-circular hole and the second semi-circular hole jointly provide the first through hole. The second pipeline clamping mechanism includes a third pipe clamp 29, a fourth pipe clamp 30 and a second fixture 38. A third semi-circular hole is provided on the lower side of the third pipe clamp 29, and a fourth semi-circular hole is provided on the upper side of the fourth pipe clamp 30. When the third pipe clamp 29 and the fourth pipe clamp 30 are joined together by the second fixture 38, the third semi-circular hole and the fourth semi-circular hole jointly provide the second through hole. In this case, the second pipe clamp 16 and the fourth pipe clamp 30 can be installed first. The second semi-circular hole on the second pipe clamp 16 and the fourth semi-circular hole on the fourth pipe clamp 30 can correspondingly form a receiving groove for the pipeline 5 to be inspected. After placing the pipeline 5 to be inspected on the receiving groove of the pipeline 5 to be inspected, then place the first pipe clamp 15 correspondingly on the second pipe clamp 16 and the pipeline 5 to be inspected, and place the third pipe clamp 29 correspondingly on the fourth pipe clamp 30 and the pipeline 5 to be inspected. At this time, one end of the pipeline 5 to be inspected can be clamped by the first pipe clamp 15 and the second pipe clamp 16, and the other end of the pipeline 5 to be inspected can be clamped by the third pipe clamp 29 and the fourth pipe clamp 30. Then use the first fixture 14 to fix the joint between the first pipe clamp 15 and the second pipe clamp 16, and use the second fixture 38 to fix the joint between the third fixture 29 and the fourth fixture 30, so as to realize more stable clamping of the pipeline 5 to be inspected. Moreover, the first pipe clamp 15, the second pipe clamp 16, the third pipe clamp 29 and the fourth pipe clamp 30 can be adjusted and replaced according to the outer diameter of the pipeline 5 to be inspected, making the application range of the pipeline pressure testing and leak detection device provided by the embodiment of the present invention wider.

[0101] Among them, the pipeline pressure test and leak detection device provided by the embodiments of the present invention further includes a first connector 6, a first bottom connector 17, a second connector 7, and a second bottom connector 32. The first manipulator M is connected to the second connection seat 4 through the first connector 6, and the first bottom connector 17 is fixedly connected to the first connector 6. The second manipulator N is connected to the first connection seat 1 through the second connector 7, and the second bottom connector 32 is fixedly connected to the second connector 7. The second pipe clamp 16 is connected to the first bottom connector 17, and the fourth pipe clamp 30 is connected to the second bottom connector 32. In this case, the first manipulator M and the second manipulator N can be more stably connected to the first connection seat 1 and the second connection seat 4, and the connection is more convenient.

[0102] Among them, the pipeline pressure testing and leak detection device further includes a first boss, a first limiting block, a second boss, and a second limiting block 59. The first boss is fixedly connected to the bottom of the second pipe clamp 16, such that the first boss forms a first flange 18 and a second flange 76 along the axial direction at the bottom relative to the second pipe clamp 16, and the first boss forms a first limiting step and a second limiting step along the radial direction at the bottom relative to the second pipe clamp 16; the first limiting block is fixedly connected to the bottom of the first boss. The second boss is fixedly connected to the bottom of the fourth pipe clamp 30, such that the second boss forms a third flange 31 and a fourth flange 35 along the axial direction at the bottom relative to the second pipe clamp 16, and the first boss forms a third limiting step and a fourth limiting step along the radial direction at the bottom relative to the second pipe clamp 30; the second limiting block 59 is fixedly connected to the bottom of the second boss. A first accommodation hole is formed on the first bottom connecting member 17. The first accommodation hole is a first stepped hole, and the first stepped hole includes a first section hole and a second section hole. A first limiting boss and a second limiting boss are formed on the opening side of the first stepped hole. The radial dimension of the second section hole is smaller than that of the first section hole. The first section hole is adapted to the shape of the first boss, and the second section hole is adapted to the shape of the first limiting block. A second accommodation hole is formed on the second bottom connecting member 32. The second accommodation hole is a second stepped hole, and the second stepped hole includes a third section hole 64 and a fourth section hole 65. A third limiting boss 62 and a fourth limiting boss 63 are formed on the opening side of the second stepped hole. The radial dimension of the fourth section hole 65 is smaller than that of the third section hole 64. The third section hole 64 is adapted to the shape of the second boss, and the fourth section hole 65 is adapted to the shape of the second limiting block 59. The first clamp 14 is pressed on the top of the first pipe clamp 15, and a first hook 19 is formed at the free end of the first clamping arm 39 of the first clamp 14, and a second hook 77 is formed at the free end of the second clamping arm 40 of the first clamp 14. The first hook 19 abuts against the bottom of the first flange 18, and the second hook 77 abuts against the bottom of the second flange 76. The second clamp 38 is pressed on the top of the third pipe clamp 29, and a third hook 34 is formed at the free end of the third clamping arm 28 of the second clamp 38, and a fourth hook 36 is formed at the free end of the fourth clamping arm 37 of the second clamp 38. The third hook 34 abuts against the bottom of the third flange 31, and the fourth hook 36 abuts against the bottom of the fourth flange 35. In this case, the second pipe clamp 16 forms a linear guide pair with the first bottom connecting member 17 by using the first limiting block, making the connection between the second pipe clamp 16 and the first bottom connecting member 17 more convenient; the fourth pipe clamp 30 forms a linear guide pair with the second bottom connecting member 32 by using the second limiting block 59, making the connection between the fourth pipe clamp 30 and the second bottom connecting member 32 more convenient.Moreover, by using the top of the first clamp 14, the first hook 19, and the second hook 77, the clamping of the first pipe clamp 15 and the second pipe clamp 16 on the pipeline 5 to be inspected can be made more stable; by using the top of the second clamp 38, the third hook 34, and the fourth hook 36, the clamping of the third pipe clamp 29 and the fourth pipe clamp 30 on the pipeline 5 to be inspected can be made more stable.

[0103] Among them, the pipeline pressure test and leak detection device provided by the embodiment of the present invention further includes a first raised point, a second raised point, a third raised point 41, and a fourth raised point 42. The first raised point and the second raised point are arranged at the bottom of the horizontal arm of the first clamp 14 and on the top of the first pipe clamp 15; a first recessed point is arranged at a position corresponding to the first raised point, and a second recessed point is arranged at a position corresponding to the second raised point; the first recessed point is adapted to the first raised point, and the second recessed point is adapted to the second raised point. The third raised point 41 and the fourth raised point 42 are arranged at the bottom of the horizontal arm of the second clamp 38 and on the top of the third pipe clamp 29; a third recessed point 60 is arranged at a position corresponding to the third raised point 41, and a fourth recessed point 61 is arranged at a position corresponding to the fourth raised point 42; the third recessed point 60 is adapted to the third raised point 41, and the fourth recessed point 61 is adapted to the fourth raised point 42. In this case, by using the cooperation between the first raised point and the first recessed point of the first clamp 14 and the cooperation between the second raised point and the second recessed point, the positioning between the first clamp 14 and the first pipe clamp 15 is made more accurate; by using the cooperation between the third raised point 41 and the third recessed point 60 of the second clamp 38 and the cooperation between the fourth raised point 42 and the fourth recessed point 61, the positioning between the second clamp 38 and the third pipe clamp 29 is made more accurate.

[0104] Among them, the pipeline pressure test and leak detection device provided by the embodiment of the present invention further includes a first set screw 12, a second set screw 13, a third set screw 26, and a fourth set screw 27. The horizontal arm of the first clamp 14 is provided with a first screw hole and a second screw hole. The foot of the first set screw 12 passes through the first screw hole and abuts against the top of the first pipe clamp 15, and the foot of the second set screw 13 passes through the second screw hole and abuts against the top of the first pipe clamp 15. The horizontal arm of the second clamp 38 is provided with a third screw hole and a fourth screw hole. The foot of the third set screw 26 passes through the third screw hole and abuts against the top of the third pipe clamp 29, and the foot of the fourth set screw 27 passes through the fourth screw hole and abuts against the top of the third pipe clamp 29. In this case, the clamping of the first clamp 14 on the first pipe clamp 15 and the second pipe clamp 16 on the pipeline 5 to be inspected is more stable, and the clamping of the second clamp 38 on the third pipe clamp 29 and the fourth pipe clamp 30 on the pipeline 5 to be inspected is more stable.

[0105] Among them, the pipeline pressure test and leak detection device provided by the embodiments of the present invention further includes a third connecting member 8, a first lead screw 10, a first lead screw penetrating shaft 55, a fourth connecting member 24, a second lead screw 23, and a second lead screw penetrating shaft 58. The third connecting member 8 includes a first horizontal portion and a first vertical portion. The first vertical portion is fixedly connected to the first horizontal portion, and the first horizontal portion is fixedly connected to the first connecting member 6. The first lead screw penetrating shaft 55 is fixedly arranged on the first vertical portion through an eighth connecting member 69. After one end of the first lead screw 10 passes through the through hole of the first lead screw penetrating shaft 55, it clamps one end of the pipeline under test 5. The fourth connecting member 24 includes a second horizontal portion and a second vertical portion. The second vertical portion is fixedly connected to the second horizontal portion, and the second horizontal portion is fixedly connected to the second connecting member 7. The second lead screw penetrating shaft 58 is fixedly arranged on the second vertical portion through a sixth connecting member 50. After one end of the second lead screw 23 passes through the through hole of the second lead screw penetrating shaft 58, it clamps the other end of the pipeline under test 5. In this case, the rotational movement of the first lead screw 10 can be converted into the axial movement of the first manipulator M on the pipeline under test 5, and the rotational movement of the second lead screw 23 can be converted into the axial movement of the second manipulator N on the pipeline under test 5, so as to realize the fine adjustment of the distance between the first manipulator M and the second manipulator N.

[0106] Among them, the pipeline pressure test and leak detection device provided by the embodiments of the present invention further includes a first pipe plug 54 and a second pipe plug 53. One end of the first pipe plug 54 is fixedly connected to the first lead screw 10 for clamping one end of the pipeline under test 5, and the other end of the first pipe plug 54 is stuffed into one end of the pipeline under test 5. One end of the second pipe plug 53 is fixedly connected to the second lead screw 23 for clamping one end of the pipeline under test 5, and the other end of the second pipe plug 53 is stuffed into the other end of the pipeline under test 5. The medium output end is arranged on the first pipe plug 54 and the second pipe plug 53. In this case, by adjusting the distance between the first pipe plug 54 and the second pipe plug 53 through the first lead screw 10 and the second lead screw 23, the sealing tightness of the pipeline under test 5 is adjusted, so that the leak detection accuracy of the pipeline under test 5 is higher.

[0107] Among them, the pipeline pressure test and leak detection device provided by the embodiments of the present invention further includes a first support member 11 and a second support member 25. The first pipe plug 54 is fixedly arranged on the first support member 11, and the second pipe plug 53 is fixedly arranged on the second support member 25. In this case, the connection stability between the first pipe plug 54, the second pipe plug 53 and the pipeline under test 5 can be ensured.

[0108] Among them, the first pipe plug 54 is in the shape of a first cone, and the first pipe plug 54 is stuffed into one end of the pipeline 5 to be inspected through its side with a smaller diameter. The second pipe plug 53 is in the shape of a second cone, and the second pipe plug 53 is stuffed into the other end of the pipeline 5 to be inspected through its side with a smaller diameter. In this case, by adjusting the distance between the first lead screw 10 and the second lead screw 23, the sealing performance of the pipeline 5 to be inspected can be adjusted through the first pipe plug 54 and the second pipe plug 53, and the adjustment is more convenient.

[0109] Among them, the pipeline pressure test and leakage detection device provided by the embodiment of the present invention further includes a third lead screw threading shaft 57, a first limit shaft sleeve 46, a fifth connecting member 47, a fourth lead screw threading shaft 56, a second limit shaft sleeve 51 and a seventh connecting member 52. The third lead screw threading shaft 57 is arranged on the first support member 11 through the first limit shaft sleeve 46 and the fifth connecting member 47, and the first lead screw 10 also passes through the third lead screw threading shaft 57. The fourth lead screw threading shaft 56 is arranged on the second support member 25 through the second limit shaft sleeve 51 and the seventh connecting member 52, and the second lead screw 23 also passes through the fourth lead screw threading shaft 56. In this case, the arrangements of the first lead screw 10 and the second lead screw 23 are more stable.

[0110] Among them, the valve includes a first needle valve 44, a first pressure pipe, a second needle valve 33 and a second pressure pipe 68. A first needle valve accommodation groove is provided on the first support member 11. The first needle valve 44 is arranged in the first needle valve accommodation groove through its feet. A first medium accommodation hole is arranged in the first needle valve 44. A second medium accommodation hole and a seventh medium accommodation hole are provided on the first support member. The first pressure pipe is fixedly arranged inside the first pipe plug 54. A fourth medium accommodation hole is arranged inside the second pressure pipe. The first pressure port, the first medium accommodation hole, the second medium accommodation hole, the third medium accommodation hole and the fourth medium accommodation hole of the first needle valve 44 are communicated with each other and are also communicated with the inside of the pipeline under inspection 5. A second needle valve accommodation groove 71 is provided on the second support member 25. The second needle valve 33 is arranged in the second needle valve accommodation groove 71 through its feet. A fifth medium accommodation hole 72 is arranged in the second needle valve 33. A sixth medium accommodation hole 73 and a seventh medium accommodation hole 74 are provided on the second support member 25. The second pressure pipe 68 is fixedly arranged inside the second pipe plug 53. An eighth medium accommodation hole 75 is arranged inside the second pressure pipe 68. The second pressure port 70, the fifth medium accommodation hole 72, the sixth medium accommodation hole 73, the seventh medium accommodation hole 74 and the eighth medium accommodation hole 75 of the second needle valve 33 are communicated with each other and are also communicated with the inside of the pipeline under inspection 5. In this case, through the first needle valve 44 and the second needle valve 33, the detection medium can be input into the pipeline under inspection 5, and the input of the detection medium is more convenient. In this embodiment, the apertures of the third medium accommodation hole and the seventh medium accommodation hole 74 are relatively large, which can provide a better buffer space for the detection medium input from the first needle valve 44 and the second needle valve 33, and can ensure the application safety and stability of the pipeline pressure testing and leakage detection device provided by the embodiment of the present invention, thereby improving the service life of the pipeline pressure testing and leakage detection device provided by the embodiment of the present invention.

[0111] Among them, the pipeline pressure testing and leakage detection device provided by the embodiment of the present invention further includes a first handwheel 9 and a second handwheel 2. The output shaft of the first handwheel 9 is fixedly connected to the first lead screw 10, and the output shaft of the second handwheel 22 is fixedly connected to the second lead screw 23. In this case, according to the principle of torque action, due to the increase in the length of the force arm, a smaller acting force applied to the first handwheel 9 and the second handwheel 2 can realize the rotation of the first lead screw 10 and the second lead screw 23, and the operation is more convenient.

[0112] Among them, chamfers are processed on both sides of the bottom of the first limit block, and chamfers are processed on both sides of the bottom of the second limit block 59. In this case, it can avoid the problem that the gap between the first limit block and the first bottom connecting member 17 is too small, and the contact surface is under negative pressure, resulting in difficulty in removing the first limit block from the first bottom connecting member 17, and avoid the problem that the gap between the second limit block 59 and the second bottom connecting member 32 is too small, and the contact surface is under negative pressure, resulting in difficulty in removing the second limit block 59 from the second bottom connecting member 32.

[0113] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0114] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. Pipeline pressure test leak detection device, characterized in that, Comprising a first manipulator (M), a second manipulator (N) and a valve, One end of the pipeline under inspection (5) can be hermetically clamped by the first manipulator (M), and the other end of the pipeline under inspection (5) can be hermetically clamped by the second manipulator (N), The medium output end of the valve communicates with the accommodation space inside the pipeline under inspection (5). Through the valve, a detection medium can be conveyed to the accommodation space of the pipeline under inspection (5). Whether there is leakage in the accommodation space of the pipeline under inspection (5) by the detection medium is used to determine whether the pipeline under inspection (5) leaks.

2. The pipeline pressure test leak detection device according to claim 1, wherein It further comprises a connecting seat, The first manipulator (M) and the second manipulator (N) are respectively fixedly connected to the connecting seat.

3. The pipeline pressure test leak detection device according to claim 2, characterized in that, It further comprises a hinge (2) and a latch (3), The connecting seat comprises a first connecting seat (1) and a second connecting seat (4), The first manipulator (M) is connected to the second connecting seat (4), and the second manipulator (N) is connected to the first connecting seat (1); One side of the first connecting seat (1) and the second connecting seat (4) is connected together by the hinge (2), so that the first connecting seat (1) and the second connecting seat (4) can rotate around the hinge (2) as the rotation center; The other side of the first connecting seat (1) and the second connecting seat (4) is detachably connected together by the latch (3), so that when the first connecting seat (1) and the second connecting seat (4) are connected into one body by the latch (3), the first manipulator (M) and the second manipulator (N) can clamp a straight pipeline under inspection (5); and when the other side of the first connecting seat (1) and the second connecting seat (4) is not connected into one body by the latch (3), the first manipulator (M) and the second manipulator (N) can clamp the pipeline under inspection (5) presenting a set angle, wherein the included angle presented by the pipeline under inspection (5) is equal to the included angle between the first connecting seat (1) and the second connecting seat (5).

4. The pipeline pressure test and leak detection device according to claim 3, wherein A second limiting groove (21) and a third limiting groove (49) are formed on the first connecting seat (1), A first limiting groove (20) and a fourth limiting groove (48) are formed on the second connecting seat (4), The first manipulator (M) can linearly move on the second connecting seat (4) along the first limiting groove (20) and the fourth limiting groove (48) of the second connecting seat (4); The second manipulator (N) can linearly move on the first connecting seat (1) along the second limiting groove (21) and the third limiting groove (49) of the first connecting seat (1).

5. The pipeline pressure test and leak detection device according to claim 1, wherein The first manipulator (M) comprises a first pipeline clamping mechanism, and / or the second manipulator (N) comprises a second pipeline clamping mechanism; The first pipeline clamping mechanism provides a first through hole, The free end of one end of the pipeline under inspection (5) passing through the first through hole is sealed; The second pipeline clamping mechanism provides a second through hole (45), The free end of the other end of the pipeline under inspection (5) after passing through the second through hole is sealed.

6. The pipeline pressure test leak detection device according to claim 5, characterized in that The first pipeline clamping mechanism includes a first pipe clamp (15), a second pipe clamp (16) and a first fixture (14), A first semi-circular hole is provided on the lower side of the first pipe clamp (15), and a second semi-circular hole is provided on the upper side of the second pipe clamp (16). When the first pipe clamp (15) and the second pipe clamp (16) are joined together by the first fixture (14), the first semi-circular hole and the second semi-circular hole jointly provide the first through hole; The second pipeline clamping mechanism includes a third pipe clamp (29), a fourth pipe clamp (30) and a second fixture (38), A third semi-circular hole is provided on the lower side of the third pipe clamp (29), and a fourth semi-circular hole is provided on the upper side of the fourth pipe clamp (30). When the third pipe clamp (29) and the fourth pipe clamp (30) are joined together by the second fixture (38), the third semi-circular hole and the fourth semi-circular hole jointly provide the second through hole.

7. The pipeline pressure test and leak detection device according to claim 6, characterized in that, It further includes a first connecting piece (6), a first bottom connecting piece (17), a second connecting piece (7) and a second bottom connecting piece (32), The first manipulator (M) is connected to the second connecting seat (4) through the first connecting piece (6), and the first bottom connecting piece (17) is fixedly connected to the first connecting piece (6); The second manipulator (N) is connected to the first connecting seat (1) through the second connecting piece (7), and the second bottom connecting piece (32) is fixedly connected to the second connecting piece (7); The second pipe clamp (16) is connected to the first bottom connecting piece (17), The fourth pipe clamp (30) is connected to the second bottom connecting piece (32).

8. The pipeline pressure testing and leak detection device according to claim 7, characterized in that, It further includes a first boss, a first limiting block, a second boss and a second limiting block (59), The first boss is fixedly connected to the bottom of the second pipe clamp (16), so that the first boss forms a first flange (18) and a second flange (76) along the axial direction at the bottom relative to the second pipe clamp (16), and the first boss forms a first limiting step and a second limiting step along the radial direction at the bottom relative to the second pipe clamp (16); the first limiting block is fixedly connected to the bottom of the first boss; The second boss is fixedly connected to the bottom of the fourth pipe clamp (30), so that the second boss forms a third flange (31) and a fourth flange (35) along the axial direction at the bottom relative to the second pipe clamp (16), and the first boss forms a third limiting step and a fourth limiting step along the radial direction at the bottom relative to the second pipe clamp (30); the second limiting block (59) is fixedly connected to the bottom of the second boss; The first bottom connecting member (17) is provided with a first accommodation hole, the first accommodation hole being a first stepped hole. The first stepped hole includes a first section hole and a second section hole. A first limiting boss and a second limiting boss are formed on the opening side of the first stepped hole. The radial dimension of the second section hole is smaller than that of the first section hole. The first section hole is adapted to the shape of the first boss, and the second section hole is adapted to the shape of the first limiting block; The second bottom connecting member (32) is provided with a second accommodation hole, the second accommodation hole being a second stepped hole. The second stepped hole includes a third section hole (64) and a fourth section hole (65). A third limiting boss (62) and a fourth limiting boss (63) are formed on the opening side of the second stepped hole. The radial dimension of the fourth section hole (65) is smaller than that of the third section hole (64). The third section hole (64) is adapted to the shape of the second boss, and the fourth section hole (65) is adapted to the shape of the second limiting block (59); The first fixture (14) is pressed on top of the first pipe clamp (15). And a first hook (19) is formed at the free end of the first clamping arm (39) of the first fixture (14), and a second hook (77) is formed at the free end of the second clamping arm (40) of the first fixture (14). The first hook (19) abuts against the bottom of the first flange (18), and the second hook (77) abuts against the bottom of the second flange (76); The second fixture (38) is pressed on top of the third pipe clamp (29). And a third hook (34) is formed at the free end of the third clamping arm (28) of the second fixture (38), and a fourth hook (36) is formed at the free end of the fourth clamping arm (37) of the second fixture (38). The third hook (34) abuts against the bottom of the third flange (31), and the fourth hook (36) abuts against the bottom of the fourth flange (35).

9. The pipeline pressure test leak detection device according to claim 8, characterized in that It further includes a first convex starting point, a second convex starting point, a third convex starting point (41) and a fourth convex starting point (42), The first convex starting point and the second convex starting point are arranged at the bottom of the horizontal arm of the first fixture (14) and on the top of the first pipe clamp (15); a first concave starting point is arranged at a position corresponding to the first convex starting point, and a second concave starting point is arranged at a position corresponding to the second convex starting point; the first concave starting point is adapted to the first convex starting point, and the second concave starting point is adapted to the second convex starting point; The third convex point position (41) and the fourth convex point position (42) are arranged at the bottom of the horizontal arm of the second fixture (38) and on the top of the third pipe clamp (29); a third concave point position (60) is arranged at a position corresponding to the third convex point position (41), and a fourth concave point position (61) is arranged at a position corresponding to the fourth convex point position (42); the third concave point position (60) is adapted to the third convex point position (41), and the fourth concave point position (61) is adapted to the fourth convex point position (42).

10. The pipeline pressure test leak detection device according to claim 6, characterized in that, It further includes a first set screw (12), a second set screw (13), a third set screw (26) and a fourth set screw (27). A first screw hole and a second screw hole are provided on the horizontal arm of the first fixture (14). The foot of the first set screw (12) passes through the first screw hole and abuts against the top of the first pipe clamp (15), and the foot of the second set screw (13) passes through the second screw hole and abuts against the top of the first pipe clamp (15). A third screw hole and a fourth screw hole are provided on the horizontal arm of the second fixture (38). The foot of the third set screw (26) passes through the third screw hole and abuts against the top of the third pipe clamp (29), and the foot of the fourth set screw (27) passes through the fourth screw hole and abuts against the top of the third pipe clamp (29). Preferably, the pipeline pressure test and leak detection device further includes a third connecting piece (8), a first lead screw (10), a first lead screw through shaft (55), a fourth connecting piece (24), a second lead screw (23) and a second lead screw through shaft (58). The third connecting piece (8) includes a first horizontal part and a first vertical part. The first vertical part is fixedly connected to the first horizontal part, the first horizontal part is fixedly connected to the first connecting piece (6), the first lead screw through shaft (55) is fixedly arranged on the first vertical part through an eighth connecting piece (69), and one end of the first lead screw (10) passes through the through hole of the first lead screw through shaft (55) and clamps one end of the pipeline under test (5). The fourth connecting piece (24) includes a second horizontal part and a second vertical part. The second vertical part is fixedly connected to the second horizontal part, the second horizontal part is fixedly connected to the second connecting piece (7), the second lead screw through shaft (58) is fixedly arranged on the second vertical part through a sixth connecting piece (50), and one end of the second lead screw (23) passes through the through hole of the second lead screw through shaft (58) and clamps the other end of the pipeline under test (5). Preferably, the pipeline pressure test and leak detection device further includes a first pipe plug (54) and a second pipe plug (53). One end of the first pipe plug (54) is fixedly connected to the first lead screw (10) for clamping one end of the pipeline under test (5), and the other end of the first pipe plug (54) fills one end of the pipeline under test (5). One end of the second pipe plug (53) is fixedly connected to the second lead screw (23) for clamping one end of the pipeline under test (5), and the other end of the second pipe plug (53) is stuffed into the other end of the pipeline under test (5); The medium output end is arranged on the first pipe plug (54) and the second pipe plug (53); Preferably, the pipeline pressure test and leak detection device further includes a first support member (11) and a second support member (25), The first pipe plug (54) is fixedly arranged on the first support member (11), The second pipe plug (53) is fixedly arranged on the second support member (25); Preferably, The first pipe plug (54) is in the shape of a first cone, and the first pipe plug (54) is stuffed into one end of the pipeline under test (5) through its smaller diameter side; The second pipe plug (53) is in the shape of a second cone, and the second pipe plug (53) is stuffed into the other end of the pipeline under test (5) through its smaller diameter side; Preferably, the pipeline pressure test and leak detection device further includes a third lead screw passing shaft (57), a first limiting shaft sleeve (46), a fifth connecting member (47), a fourth lead screw passing shaft (56), a second limiting shaft sleeve (51) and a seventh connecting member (52), The third lead screw passing shaft (57) is arranged on the first support member (11) through the first limiting shaft sleeve (46) and the fifth connecting member (47), and the first lead screw (10) also passes through the third lead screw passing shaft (57); The fourth lead screw passing shaft (56) is arranged on the second support member (25) through the second limiting shaft sleeve (51) and the seventh connecting member (52), and the second lead screw (23) also passes through the fourth lead screw passing shaft (56); Preferably, the valve includes a first needle valve (44), a first pressure pipe, a second needle valve (33) and a second pressure pipe (68), A first needle valve accommodation groove is provided on the first support member (11), the first needle valve (44) is arranged on the first needle valve accommodation groove through its foot, a first medium accommodation hole is arranged in the first needle valve (44), a second medium accommodation hole and a seventh medium accommodation hole are provided on the first support member, the first pressure pipe is fixedly arranged inside the first pipe plug (54), a fourth medium accommodation hole is arranged inside the second pressure pipe, and the first pressure port, the first medium accommodation hole, the second medium accommodation hole, the third medium accommodation hole and the fourth medium accommodation hole of the first needle valve (44) are communicated with each other and are communicated with the inside of the pipeline under test (5); The second support member (25) is provided with a second needle valve accommodation groove (71). The second needle valve (33) is arranged in the second needle valve accommodation groove (71) through its foot portion. A fifth medium accommodation hole (72) is arranged in the second needle valve (33). The second support member (25) is provided with a sixth medium accommodation hole (73) and a seventh medium accommodation hole (74). The second pressure pipe (68) is fixedly arranged inside the second pipe plug (53), and an eighth medium accommodation hole (75) is arranged inside the second pressure pipe (68). The second pressure port (70), the fifth medium accommodation hole (72), the sixth medium accommodation hole (73), the seventh medium accommodation hole (74) and the eighth medium accommodation hole (75) of the second needle valve (33) are communicated with each other and are communicated with the inside of the pipeline to be inspected (5); Preferably, the pipeline pressure testing and leak detection device further comprises a first handwheel (9) and a second handwheel (2), The output shaft of the first handwheel (9) is fixedly connected to the first lead screw (10), The output shaft of the second handwheel (22) is fixedly connected to the second lead screw (23); Preferably, Both sides of the bottom of the first limit block are processed with chamfers, Both sides of the bottom of the second limit block (59) are processed with chamfers.

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