Bent pipe air tightness detection equipment

Abstract

The utility model discloses a bent pipe air tightness detection device, which comprises a mounting rack, a test box, a moving rack and a positioning assembly, and is characterized in that the mounting rack is used for being mounted on the ground; the test box is arranged on the mounting frame in a sliding manner, and the interior of the test box is used for containing liquid; the moving frame is arranged on the mounting frame in a sliding manner; the positioning assembly is used for positioning the steel-plastic pipe fitting; wherein the positioning assembly comprises a plurality of front plugs and a plurality of rear plugs, the movable frame is further provided with a plurality of first telescopic assemblies, the front plugs are installed on the first telescopic assemblies, the rear plugs are arranged in the test box, and the front plugs are used for being connected with the steel-plastic pipe fittings in a sealed mode; a PE pipe is installed at the end, close to the rear plug, of the steel-plastic pipe fitting, and the rear plug is used for being connected with the PE pipe in a sealed mode. The objective of the utility model is to solve the problem that the detection efficiency of the detection device is low because the pipeline air tightness detection device in the prior art can only detect the air tightness of a single bent pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline air tightness detection, in particular to bent pipe air tightness detection equipment. Background Art

[0002] Pipeline air tightness testing refers to injecting compressed air or water and other media into the pipeline, then applying a certain pressure to observe whether there is any air or water leakage, so as to ensure that the pipeline system will not leak during use and to ensure the safety and stable operation of the system.

[0003] The significance of pipeline gas tightness testing is to ensure the normal operation and safety of the pipeline system. By testing the gas tightness of the pipeline, we can effectively avoid gas leakage problems, reduce safety hazards, and prevent leakage accidents. This testing work is conducive to ensuring the stable operation of the pipeline system in modern industrial production, in line with national standards (GB / T12234-2010), and ensuring that there will be no gas leakage in the pipeline during operation, thereby maintaining the safety of production equipment and personnel.

[0004] The utility model patent with application number: CN201921028594.1 and authorization announcement number: CN209858149U (hereinafter referred to as "prior art 1") discloses a detection equipment for detecting the air tightness of a pipeline, which is characterized in that a detection groove is arranged above the mobile platform, and two guide rails are arranged in parallel at the bottom of the inner wall of the detection groove. The guide rails pass through the fixed baffle, the positioning support block, and the hydraulic push plate from left to right in sequence. The left and right sides of the guide rails are connected to the telescopic rod of the telescopic pneumatic cylinder, and the guide rails are controlled to move up and down in the detection groove by the telescopic pneumatic cylinder. The hydraulic push plate is connected to the pneumatic cylinder arranged below the detection groove through a conduit, and the pneumatic cylinder controls the hydraulic push plate to reciprocate toward the fixed baffle.

[0005] The specification of prior art 1 discloses a detection device for detecting the air tightness of pipelines. When in use, a hydraulic push plate is used to continuously apply force to seal all channels of the steel-plastic conversion pipe fittings, and then the guide rail is moved downward by a telescopic pneumatic cylinder to drive the steel-plastic conversion pipe fittings into the airtightness detection liquid. After the airtightness detection liquid comes into contact with the steel-plastic conversion pipe fittings, if the airtightness of the steel-plastic conversion pipe fittings is not good, bubbles will be continuously generated, and then the staff can know whether the steel-plastic conversion pipe fittings are qualified; however, in actual applications, it is impossible to perform airtightness tests on multiple pipelines at the same time, and the detection efficiency of the pipelines is low. Summary of the invention

[0006] The utility model provides a bent pipe air tightness detection device, which aims to solve the problem that the pipeline air tightness detection device in the prior art can only detect the air tightness of a single bent pipe, thereby resulting in low detection efficiency of the detection device.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] The air tightness detection equipment for bent pipes comprises a mounting frame, a test box, a mobile frame and a positioning assembly, wherein the mounting frame is used to be installed on the ground; the test box is slidably arranged on the mounting frame, and the interior of the test box is used to contain liquid; the mobile frame is slidably arranged on the mounting frame; and the positioning assembly is used to position the steel-plastic pipe fitting;

[0009] Among them, the positioning assembly includes a front plug and a rear plug, and there are several front plugs and rear plugs. Several first telescopic assemblies are also provided on the mobile frame. The front plug is installed on the first telescopic assembly, and the rear plug is arranged inside the test box. The front plug is used for sealing connection with the steel-plastic pipe fitting; a PE pipe is installed at one end of the steel-plastic pipe fitting close to the rear plug, and the rear plug is used for sealing connection with the PE pipe; an L-shaped air inlet hole is provided on the front plug, one end of the L-shaped air inlet hole is connected to the air pumping device, and the other end is connected to the outside; a second telescopic assembly is also provided on the mounting frame, and a pressure rod is installed at the end of the second telescopic assembly, and the pressure rod is used to contact the outer surface of the steel-plastic pipe fitting.

[0010] Furthermore, the movable frame is slidably matched with the mounting frame through a first transmission mechanism.

[0011] Furthermore, the first transmission mechanism includes a first motor, a first ball screw and a first screw nut. The first motor is arranged on a mounting frame, and a mounting plate is also arranged on the mounting frame. One end of the first ball screw is fixedly connected to the output shaft of the first motor, and the other end is rotatably connected to the mounting plate. The first screw nut is installed at the rear of the movable frame, and the first screw nut cooperates with the first ball screw.

[0012] Furthermore, the movable frame is slidably matched with the mounting frame through a first sliding assembly.

[0013] Furthermore, the first sliding assembly includes a first sliding rail and a first self-locking slider. The first self-locking slider is installed on the moving frame, and the first self-locking slider is slidably matched with the first sliding rail.

[0014] Furthermore, the test box is slidingly matched with the mounting frame through a second transmission mechanism, the second transmission mechanism includes a second motor, a second ball screw and a second screw nut, the second motor is arranged on the mounting frame, one end of the second ball screw is connected to the output shaft of the second motor, and the other end is rotatably connected to the bottom of the mounting frame, the second screw nut is fixedly mounted on the side of the mobile frame, and the second ball screw and the second screw nut cooperate with each other.

[0015] Furthermore, the test box is slidably matched with the mounting frame through a second sliding assembly, the second sliding assembly includes a second slide rail and a second self-locking slider, the second self-locking slider is arranged on the side of the test box, and the second self-locking slider is slidably matched with the second slide rail.

[0016] Furthermore, a fixing frame is provided inside the test box, and a plurality of clamping recesses are provided on the fixing frame. The steel-plastic pipe fittings are used to be installed on the clamping recesses, and a rear plug is provided below each clamping recess.

[0017] Furthermore, a plurality of connecting plates are provided on the mounting frame, each of which is provided with a second telescopic component, a guide rod is slidably provided on the connecting plate, the fixed end of the second telescopic component is installed on the second telescopic component, the movable end passes through the connecting plate and is fixedly connected to the pressure rod, and the guide rod is fixedly connected to the pressure rod.

[0018] Furthermore, both the movable frame and the mounting frame are provided with cushion blocks, and the cushion blocks are provided with a plurality of placement recesses, the positions of the placement recesses correspond to the positions of the first telescopic components, and the placement recesses are used to place steel-plastic pipe fittings.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model mainly comprises a mounting frame, a test box, a mobile frame and a positioning assembly, wherein the mounting frame is used for being installed on the ground; in actual use, the staff firstly mounts a number of steel-plastic pipe fittings and PE pipes that need to be tested on the rear plug in the test box as a whole, and the rear plug is sealed and connected with the end of the PE pipe; then the staff holds the steel-plastic pipe fitting by hand and adjusts the height of the test box until the end face of the steel-plastic pipe fitting and the front plug are at the same height, and the height of the test box is fixed, and then the mobile frame is driven to slide, at this time, after the mobile frame slides to a position close to the steel-plastic pipe fitting, the position of the mobile frame is fixed; then the first telescopic assembly is driven to extend, and after the first telescopic assembly is extended, the movable end of the first telescopic device drives the front plug to move the steel-plastic pipe fitting The end of the PE pipe is sealed; then the second telescopic device is driven to drive the pressure rod to press the steel-plastic pipe fitting onto the mounting frame; then water is injected into the test box, and the height of the water surface is above the connection between the PE pipe and the steel-plastic pipe fitting. Finally, compressed air is filled in through the L-shaped air inlet hole through the air pump device, and it is observed whether there are bubbles at the connection between the PE pipe and the steel-plastic pipe fitting. If there are bubbles, it means that the sealing between the PE pipe and the steel-plastic pipe fitting is not good; if there are no bubbles, it means that the sealing between the PE pipe and the steel-plastic pipe fitting is good; the advantage of this setting is that batches of steel-plastic pipe fittings can be tested for sealing together; and the sliding movable frame can also be used to adapt the length of the steel-plastic pipe fitting; so that the overall working efficiency of the device is higher when testing the sealing of the connection between the steel-plastic pipe fitting and the PE pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a schematic diagram of the connection relationship between the steel-plastic pipe fitting and the front plug and the rear plug in the utility model.

[0024] In the figure, 101-mounting frame, 102-test box, 103-moving frame, 104-steel-plastic pipe fittings, 105-front plug, 106-rear plug, 107-first telescopic component, 108-PE pipe, 109-L-shaped air inlet, 110-second telescopic component, 111-pressure rod, 112-first motor, 113-first ball screw, 115-mounting plate, 116-first slide rail, 117-first self-locking slider, 118-second motor, 119-second ball screw, 120-second screw nut, 121-second slide rail, 122-second self-locking slider, 123-fixed frame, 124-clamping recess, 125-connecting plate, 127-guide rod, 128-pad, 129-placing recess. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the protection scope of the present invention.

[0026] See also Figure 1 as well as Figure 2 As shown, this embodiment discloses a bent pipe air tightness detection device, including a mounting frame 101, a test box 102, a mobile frame 103 and a positioning assembly, wherein the mounting frame 101 is used to be installed on the ground; the test box 102 is slidably arranged on the mounting frame 101, and the interior of the test box 102 is used to contain liquid;

[0027] The movable frame 103 is slidably disposed on the mounting frame 101; the positioning assembly is used to position the steel-plastic pipe fitting 104;

[0028] Among them, the positioning assembly includes a front plug 105 and a rear plug 106, and there are several front plugs 105 and rear plugs 106. The mobile frame 103 is also provided with several first telescopic assemblies 107. The front plug 105 is installed on the first telescopic assembly 107, and the rear plug 106 is arranged inside the test box 102. The front plug 105 is used to be sealed and connected with the steel-plastic pipe fitting 104; a PE pipe 108 is installed at one end of the steel-plastic pipe fitting 104 close to the rear plug 106, and the rear plug 106 is used to be sealed and connected with the PE pipe 108; an L-shaped air inlet hole 109 is provided on the front plug 105, one end of the L-shaped air inlet hole 109 is connected to the air pumping device, and the other end is connected to the outside; a second telescopic assembly 110 is also provided on the mounting frame 101, and a pressure rod 111 is installed at the end of the second telescopic assembly 110, and the pressure rod 111 is used to contact the outer surface of the steel-plastic pipe fitting 104;

[0029] The utility model mainly comprises a mounting frame 101, a test box 102, a mobile frame 103 and a positioning assembly, wherein the mounting frame 101 is used to be installed on the ground; in actual use, the staff first mounts a number of steel-plastic pipe fittings 104 and PE pipes 108 that need to be tested on the rear plug 106 in the test box 102 as a whole, and the rear plug 106 is sealed and connected with the end of the PE pipe 108; then the staff holds the steel-plastic pipe fitting 104 by hand and adjusts the height of the test box 102 until the end face of the steel-plastic pipe fitting 104 and the front plug 105 are at the same height to fix the height of the test box 102, and then drives the mobile frame 103 to slide, at this time, after the mobile frame 103 slides to a position near the steel-plastic pipe fitting 104, the position of the mobile frame 103 is fixed; then the first telescopic assembly 107 is driven to extend, and after the first telescopic assembly 107 is extended, the movable end of the first telescopic device drives the front plug 105 to The end of the steel-plastic pipe fitting 104 is sealed; then the second telescopic device is driven to drive the pressure rod 111 to press the steel-plastic pipe fitting 104 onto the mounting frame 101; then water is injected into the test box 102, and the height of the water surface is higher than the connection between the PE pipe 108 and the steel-plastic pipe fitting 104, and finally compressed air is filled in through the L-shaped air inlet 109 through the air pumping device, and it is observed whether there are bubbles at the connection between the PE pipe 108 and the steel-plastic pipe fitting 104. If there are bubbles, it means that the sealing between the PE pipe 108 and the steel-plastic pipe fitting 104 is not good; if there are no bubbles, it means that the sealing between the PE pipe 108 and the steel-plastic pipe fitting 104 is good; the advantage of this arrangement is that the steel-plastic pipe fittings 104 can be tested for sealing together in batches; and the sliding movable frame 103 can also adapt the length of the steel-plastic pipe fitting 104; so that the overall working efficiency of the device is higher when testing the sealing of the connection between the steel-plastic pipe fitting 104 and the PE pipe 108.

[0030] In some embodiments, the mobile frame 103 is slidably matched with the mounting frame 101 through a first transmission mechanism;

[0031] In some embodiments, the first transmission mechanism includes a first motor 112, a first ball screw 113 and a first screw nut. The first motor 112 is arranged on a mounting frame 101, and a mounting plate 115 is also arranged on the mounting frame 101. One end of the first ball screw 113 is fixedly connected to the output shaft of the first motor 112, and the other end is rotatably connected to the mounting plate 115. The first screw nut is installed at the rear of the moving frame 103, and the first screw nut and the first ball screw 113 cooperate with each other.

[0032] During actual use, when the position of the movable frame 103 needs to be adjusted, the staff drives the first motor 112 to rotate, and the first motor 112 drives the first ball screw 113 to rotate. Since the first screw nut and the first ball screw 113 cooperate with each other, after the first motor 112 rotates, the movable frame 103 and the mounting frame 101 slide to form a radial limit, so the rotation of the first motor 112 will drive the movable frame 103 to slide on the mounting frame 101.

[0033] In some embodiments, the mobile frame 103 is slidably matched with the mounting frame 101 via a first sliding assembly.

[0034] In actual use, the purpose of providing the first sliding assembly is to make the sliding between the moving frame 103 and the mounting frame 101 smoother.

[0035] In some embodiments, the first sliding assembly includes a first slide rail 116 and a first self-locking slider 117 . The first self-locking slider 117 is installed on the moving frame 103 , and the first self-locking slider 117 is slidably matched with the first slide rail 116 .

[0036] In actual use, the sliding between the first self-locking slider 117 and the first slide rail 116 can make the sliding between the moving frame 103 and the mounting frame 101 more stable;

[0037] It should be noted that in this embodiment, the first self-locking slider 117 is a slider in the prior art that can freely switch between locked and active states, specifically referring to the prior art 2 with application number: CN202222863117.5. This embodiment does not involve improvements to the structure of the first self-locking slider 117, which will not be described one by one here.

[0038] In some embodiments, the test box 102 is slidably matched with the mounting frame 101 through a second transmission mechanism. The second transmission mechanism includes a second motor 118, a second ball screw 119 and a second screw nut 120. The second motor 118 is arranged on the mounting frame 101. One end of the second ball screw 119 is connected to the output shaft of the second motor 118, and the other end is rotatably connected to the bottom of the mounting frame 101. The second screw nut 120 is fixedly installed on the side of the mobile frame 103, and the second ball screw 119 and the second screw nut 120 cooperate with each other.

[0039] During actual use, when the position of the test box 102 needs to be adjusted, the staff drives the second motor 118 to rotate, and the second motor 118 drives the second ball screw 119 to rotate. Since the second screw nut 120 and the second ball screw 119 cooperate with each other, after the second motor 118 rotates, the test box 102 and the mounting frame 101 slide to form a radial limit, so the rotation of the first motor 112 will drive the test box 102 to slide on the mounting frame 101.

[0040] In some embodiments, the test box 102 slides with the mounting frame 101 through a second sliding assembly, the second sliding assembly includes a second slide rail 121 and a second self-locking slider 122, the second self-locking slider 122 is arranged on the side of the test box 102, and the second self-locking slider 122 slides with the second slide rail 121.

[0041] In actual use, the purpose of using the second self-locking slider 122 to cooperate with the second slide rail 121 is to make the sliding between the test box 102 and the mounting frame 101 more stable and smooth; similarly, the second self-locking slider 122 is the same as the first self-locking slider 117, and will not be repeated here.

[0042] In some embodiments, a fixing frame 123 is provided inside the test box 102 , and a plurality of clamping recesses 124 are provided on the fixing frame 123 . The steel-plastic pipe fittings 104 are used to be installed on the clamping recesses 124 , and a rear plug 106 is provided under each clamping recess 124 .

[0043] In actual use, the purpose of providing the fixing frame 123 is to enable the steel-plastic pipe fitting 104 to be fixed through the clamping recess 124 .

[0044] In some embodiments, a plurality of connecting plates 125 are provided on the mounting frame 101, and each connecting plate 125 is installed with a second telescopic component 110. A guide rod 127 is slidably provided on the connecting plate 125. The fixed end of the second telescopic component 110 is installed on the second telescopic component 110, and the movable end passes through the connecting plate 125 and is fixedly connected to the pressure rod 111, and the guide rod 127 is fixedly connected to the pressure rod 111.

[0045] During actual use, the pressure rod 111 brought by the second telescopic component 110 after extension moves toward the steel-plastic pipe fitting 104. When the pressure rod 111 contacts the steel-plastic pipe fitting 104, the pressure rod 111 presses the steel-plastic pipe fitting 104 on the mounting frame 101 to fix it, thereby preventing the steel-plastic pipe fitting 104 from moving during the sealing test.

[0046] In some embodiments, both the movable frame 103 and the mounting frame 101 are provided with a cushion block 128 , and a plurality of placement recesses 129 are provided on the cushion block 128 . The positions of the placement recesses 129 correspond to the positions of the first telescopic components 107 , and the placement recesses 129 are used to place the steel-plastic pipe fittings 104 .

[0047] In actual use, the main function of setting the depression is to support the steel-plastic pipe fitting 104.

[0048] As an optional implementation, in this embodiment, the first telescopic assembly 107 and the second telescopic assembly 110 have the same structure, both of which are cylinders.

[0049] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0051] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Bend pipe air tightness testing equipment, characterized in that: include: A mounting frame (101), wherein the mounting frame (101) is used for being installed on the ground; A test box (102), wherein the test box (102) is slidably disposed on the mounting frame (101), and the interior of the test box (102) is used to contain liquid; A movable frame (103), wherein the movable frame (103) is slidably arranged on the mounting frame (101); A positioning assembly, the positioning assembly being used to position the steel-plastic pipe fitting (104); The positioning assembly comprises a front plug (105) and a rear plug (106), and there are a plurality of the front plugs (105) and the rear plug (106). The movable frame (103) is also provided with a plurality of first telescopic assemblies (107). The front plug (105) is installed on the first telescopic assemblies (107), and the rear plug (106) is arranged inside the test box (102). The front plug (105) is used for sealing connection with the steel-plastic pipe fitting (104); the steel-plastic pipe fitting (104) is close to the rear plug (106). A PE tube (108) is installed at one end of the mounting frame (101), and the rear plug (106) is used for sealing connection with the PE tube (108); an L-shaped air inlet hole (109) is provided on the front plug (105), one end of the L-shaped air inlet hole (109) is connected to the air pumping device, and the other end is connected to the outside; a second telescopic component (110) is also provided on the mounting frame (101), and a pressure rod (111) is installed at the end of the second telescopic component (110), and the pressure rod (111) is used for contacting the outer surface of the steel-plastic pipe fitting (104).

2. The elbow air tightness detection device according to claim 1, characterized in that: The movable frame (103) is slidably matched with the mounting frame (101) via a first transmission mechanism.

3. The air tightness testing device for bent pipes according to claim 2, characterized in that: The first transmission mechanism comprises a first motor (112), a first ball screw (113) and a first screw nut. The first motor (112) is arranged on a mounting frame (101). A mounting plate (115) is also arranged on the mounting frame (101). One end of the first ball screw (113) is fixedly connected to an output shaft of the first motor (112), and the other end is rotatably connected to the mounting plate (115). The first screw nut is installed at the rear of the moving frame (103), and the first screw nut and the first ball screw (113) cooperate with each other.

4. The elbow air tightness detection device according to claim 1, characterized in that: The movable frame (103) is slidably matched with the mounting frame (101) via a first sliding assembly.

5. The elbow air tightness detection device according to claim 4, characterized in that: The first sliding assembly comprises a first sliding rail (116) and a first self-locking slider (117). The first self-locking slider (117) is installed on the moving frame (103). The first self-locking slider (117) is slidably matched with the first sliding rail (116).

6. The air tightness testing device for bent pipes according to claim 1, characterized in that: The test box (102) is slidably matched with the mounting frame (101) through a second transmission mechanism, the second transmission mechanism comprises a second motor (118), a second ball screw (119) and a second screw nut (120), the second motor (118) is arranged on the mounting frame (101), one end of the second ball screw (119) is connected to the output shaft of the second motor (118), and the other end is rotatably connected to the bottom of the mounting frame (101), the second screw nut (120) is fixedly mounted on the side of the moving frame (103), and the second ball screw (119) and the second screw nut (120) are matched with each other.

7. The bent pipe air tightness detection device according to claim 1, characterized in that: The test box (102) is slidably matched with the mounting frame (101) via a second sliding assembly, the second sliding assembly comprising a second slide rail (121) and a second self-locking slider (122), the second self-locking slider (122) being arranged on a side of the test box (102), and the second self-locking slider (122) is slidably matched with the second slide rail (121).

8. The bent pipe air tightness detection device according to claim 1, characterized in that: A fixing frame (123) is provided inside the test box (102), and a plurality of clamping recesses (124) are provided on the fixing frame (123). The steel-plastic pipe fitting (104) is used to be installed on the clamping recesses (124), and a rear plug (106) is provided below each clamping recess (124).

9. The bent pipe air tightness detection device according to claim 1, characterized in that: A plurality of connecting plates (125) are provided on the mounting frame (101), and each connecting plate (125) is provided with a second telescopic assembly (110). A guide rod (127) is slidably provided on the connecting plate (125). The fixed end of the second telescopic assembly (110) is installed on the second telescopic assembly (110), and the movable end passes through the connecting plate (125) and is fixedly connected to the pressure rod (111), and the guide rod (127) is fixedly connected to the pressure rod (111).

10. The bent pipe air tightness detection device according to claim 1, characterized in that: The movable frame (103) and the mounting frame (101) are both provided with a cushion block (128), and the cushion block (128) is provided with a plurality of placement recesses (129). The positions of the placement recesses (129) correspond to the positions of the first telescopic assembly (107), and the placement recesses (129) are used to place the steel-plastic pipe fittings (104).

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