Corrugated pipe leak detection apparatus

Abstract

This application relates to a corrugated pipe leak detection device, including: a detection box, a leak detection fixture placement mechanism, and a corrugated pipe leak detection cylinder. The top of the detection box is open, and a fixed plate body extends upward from the top of one side wall. The leak detection fixture placement mechanism is slidably connected to the fixed plate body. The corrugated pipe leak detection cylinder is placed inside the leak detection fixture placement mechanism. The corrugated pipe leak detection cylinder is formed by axially splicing a first sleeve and a second sleeve. The first sleeve contains a first cavity, and the second sleeve contains a second cavity. A through hole is opened on the side wall of the first sleeve, which communicates with the first cavity. A detection hole is opened on the side wall of the second sleeve, which communicates with the second cavity. A sealing element is provided at the connection between the first sleeve and the second sleeve. The leak detection fixture placement mechanism includes a placement box and a pushing part. The placement box is placed on the fixed plate body, and the pushing part is movably placed on the side wall of the placement box that is not adjacent to the fixed plate. The pushing part and the placement box can clamp and fix the corrugated pipe leak detection cylinder.

Description

Technical Field

[0001] This application relates to the field of corrugated pipe leak detection technology, and in particular to a corrugated pipe leak detection device. Background Technology

[0002] With social progress and economic development, the use of corrugated pipes in various industries is gradually increasing. However, before using corrugated pipes, leak testing is required.

[0003] Manual leak detection is time-consuming and labor-intensive, and its efficiency is low, which affects the subsequent overall equipment assembly and production efficiency.

[0004] However, depending on the different usage environments, the sealing requirements of the bellows are different, so the testing methods for the bellows are also different. A relatively simple testing method is to place the bellows into a matching leak detection fixture. One side of the fixture is connected to an air nozzle to inflate it. The other side of the leak detection fixture has a test hole. If the bellows is sealed, no bubbles will continuously appear at the test hole after the leak detection fixture is placed in water and air is continuously circulated.

[0005] In the aforementioned relatively simple corrugated pipe leak detection method, the leak detection fixture is manually placed directly into the water. After the corrugated pipe is placed inside the leak detection fixture and then assembled, the airtightness cannot be guaranteed, which affects the detection results and detection efficiency. Therefore, there is an urgent need in the existing technology for a corrugated pipe leak detection device with a simpler structure that is easy for technicians to operate. Summary of the Invention

[0006] In view of this, this application proposes a corrugated pipe leak detection device, including a detection box, a leak detection fixture placement mechanism, and a corrugated pipe leak detection cylinder; the top of the detection box is open, and a fixing plate body extends upward from the top of one side wall; the leak detection fixture placement mechanism is slidably connected to the fixing plate body; the corrugated pipe leak detection cylinder is disposed in the leak detection fixture placement mechanism; wherein, the corrugated pipe leak detection cylinder is formed by axially splicing a first sleeve and a second sleeve, and the first cavity in the first sleeve and the second cavity in the second sleeve together form the corrugated pipe receiving cavity;

[0007] The first sleeve has a through hole on its side wall, which communicates with the first cavity. The second sleeve has a detection hole on its side wall, which communicates with the second cavity. A sealing element is provided at the connection between the first sleeve and the second sleeve. The leak detection fixture placement mechanism includes a placement box and a pushing part. The placement box is disposed on the main body of the fixed plate and can be moved into the detection box. The top of the placement box is open. The pushing part is disposed on the side wall of the placement box that is not adjacent to the fixed plate. The pushing part is movably connected to the placement box. The pushing part and the opposite side wall of the placement box where the pushing part is disposed can clamp and fix the corrugated pipe detection cylinder.

[0008] In one possible implementation, the bellows is a hollow cylindrical tube; the end of the second sleeve that contacts the first sleeve extends outward with a positioning boss, and the first sleeve is provided with a positioning groove that matches the positioning boss, the positioning groove communicating with the first cavity.

[0009] In one possible implementation, a support portion extends outward from the opposite end of the second sleeve that contacts the first sleeve; the support portion has a cylindrical structure, and the radial length of the support portion is less than the radial length of the second sleeve.

[0010] In one possible implementation, the outer wall of the first sleeve has a mounting plane located around the through hole; an air nozzle is mounted on the through hole.

[0011] In one possible implementation, the fixing plate body has two or more parallel sliding grooves, and the sliding grooves are straight grooves; the top of the sliding groove extends to one side to form a limiting groove, which is connected to the sliding groove; the placement box is a rectangular box, the pushing part is located in the middle of one side of the placement box in the length direction, and one side wall of the placement box in the length direction extends to its top with an extension plate; a sliding member matching the sliding groove is installed on the extension plate.

[0012] In one possible implementation, the limiting groove extends arcuately at the top of the sliding groove, and the end of the limiting groove extending toward one side of the sliding groove is inclined toward the bottom of the fixing plate body, or the end of the limiting groove extending toward one side of the sliding groove is vertically toward the bottom of the fixing plate body; the interconnected sliding groove and the limiting groove form an inverted "J" shape on the fixing plate body.

[0013] In one possible implementation, the pushing part includes a stop member, a connecting rod, and a handle; the stop member is a block-shaped structure located inside the placement box; the end face of the placement box connected to the pushing part has a through hole, the through hole matches the connecting rod, the end of the connecting rod inside the placement box is fitted with the stop member, and the end of the connecting rod outside the placement box is fitted with the handle.

[0014] In one possible implementation, the abutment is detachably connected to the connecting rod; wherein the abutment has a block structure, and the end face of the abutment that contacts the connecting rod has a split groove; one end of the connecting rod extends into the split groove and contacts the bottom of the split groove.

[0015] In one possible implementation, the leak detection fixture placement mechanism further includes a first pad and a second pad; the first pad is fixed inside the placement box, the first pad is disposed on the opposite side of the pushing part, and a first contact groove is formed on the end face of the first pad adjacent to the pushing part, the bottom of the first contact groove having an arc surface structure; the first sleeve is adapted to the structure of the first contact groove; the second pad is fixed inside the placement box, and the second pad and the pushing part are disposed on the same side of the placement box, a second contact groove is formed in the middle of the second pad, the bottom of the second contact groove having an arc surface structure, and the top of the second contact groove communicating with the upper end face of the second pad; the outer contour of the pushing part matches the structure of the second contact groove; the outer contour of the support part matches the structure of the second contact groove.

[0016] In one possible implementation, the detection box is a cuboid box; the length of the placement box in the longitudinal direction is slightly longer than the length of the extension plate in the longitudinal direction of the placement box; a handle is provided on the surface of the extension plate adjacent to the placement box.

[0017] The beneficial effects of this application are as follows: A fixed plate body extends from one side wall of the testing chamber to the top. A movable testing fixture placement mechanism is located on the fixed plate body. After the leak-detecting fixture is placed into the bellows to be tested, gas is injected through the through-hole, and the leak-detecting fixture is placed in the leak-detecting fixture placement mechanism. Both are then placed into a testing chamber filled with water. Observing whether bubbles continuously emerge from the detection hole allows for the verification of the bellows's sealing performance. The overall principle of the equipment is simple, and it can accurately complete the leak detection work. It is ingeniously designed and easy to manufacture, and easy for those skilled in the art to operate. The equipment is assembled, locked through the fixture placement mechanism, and then placed into a water-filled testing chamber.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 This diagram illustrates the assembly of the leak detection fixture placement mechanism in the equipment according to an embodiment of this application.

[0021] Figure 2 A perspective structural diagram of the leak detection tooling placement mechanism according to an embodiment of this application is shown;

[0022] Figure 3 This diagram shows the structure of a leak detection fixture according to an embodiment of this application.

[0023] Figure 4 This diagram shows the structure of the leak detection fixture from another angle.

[0024] Figure 5 A cross-sectional view of a leak detection fixture according to an embodiment of this application is shown;

[0025] Figure 6 This is a cross-sectional view of a leak detection fixture with a bellows to be detected mounted, according to an embodiment of this application. Detailed Implementation

[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application or to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] Figure 1 This diagram illustrates the assembly of the leak detection fixture placement mechanism in the equipment according to an embodiment of this application. Figure 2 A perspective structural diagram of the leak detection tooling placement mechanism according to an embodiment of this application is shown; Figure 3 This diagram shows the structure of a leak detection fixture according to an embodiment of this application. Figure 4 This diagram shows the structure of the leak detection fixture from another angle. Figure 5 A cross-sectional view of a leak detection fixture according to an embodiment of this application is shown; Figure 6 This is a cross-sectional view of a leak detection fixture with a bellows to be detected mounted, according to an embodiment of this application.

[0032] like Figures 1-6 As shown, the corrugated pipe leak detection equipment includes: a detection box 3, a leak detection fixture placement mechanism 2, and a corrugated pipe leak detection cylinder 11. The top of the detection box 3 is open, and a fixing plate body 41 extends upward from the top of one side wall. The leak detection fixture placement mechanism 2 is slidably connected to the fixing plate body 41. The corrugated pipe leak detection cylinder 11 is disposed inside the leak detection fixture placement mechanism 2. The corrugated pipe leak detection cylinder 11 is formed by axially splicing a first sleeve 111 and a second sleeve 112. The first cavity inside the first sleeve 111 and the second cavity inside the second sleeve 112 together form the corrugated pipe 5 receiving cavity. A through hole 1112 is opened on the side wall of the first sleeve 111, and the through hole 1112 communicates with the first cavity. The second sleeve 112 has a detection hole 1123 on its side wall, which is connected to the second cavity. A sealing element 12 is provided at the connection between the first sleeve 111 and the second sleeve 112. The leak detection fixture placement mechanism 2 includes a placement box 21 and a pushing part 22. The placement box 21 is set on the fixed plate body 41 and can be moved into the detection box 3. The top of the placement box 21 is open. The pushing part 22 is set on the side wall of the placement box 21 that is not adjacent to the fixed plate. The pushing part 22 is movably connected to the placement box 21. The pushing part 22 and the placement box 21 are provided with the opposite side wall of the pushing part 22 to clamp and fix the bellows 5 detection cylinder so that a sealing structure is formed in the second cavity.

[0033] In this embodiment, a fixed plate body 41 extends from one side wall of the test chamber 3 to the top. A movable test fixture placement mechanism 2 is mounted on the fixed plate body 41. After the leak detection fixture 1 is placed into the corrugated pipe 5 to be tested, gas is injected through the through hole 1112, and the leak detection fixture 1 is placed in the leak detection fixture placement mechanism 2. Both are then placed into the test chamber 3 filled with water. Observing whether bubbles continuously emerge from the test hole 1123 allows for the detection of the corrugated pipe 5's sealing performance. The overall principle of the equipment is simple, and it can accurately complete the leak detection work. It is ingeniously structured and easy to manufacture, and also easy for those skilled in the art to operate. The equipment is assembled, locked through the fixture placement mechanism 2, and then placed into the test chamber 3 filled with water.

[0034] Furthermore, by placing the bellows 5 to be leak-tested into the bellows leak detection cylinder 11, and setting the sealing element 12 at the connection between the first sleeve 111 and the second sleeve 112, the flange on the bellows 5 can isolate and seal the first cavity and the second cavity in the bellows leak detection cylinder 11 through the sealing effect of the sealing ring. Before the test, the air pipe is sealed on the through hole 1112 of the first sleeve 111 and placed in water. It is observed whether bubbles are generated in the detection hole 1123 on the second sleeve 112 after being placed in water for a period of time. This allows for accurate detection of whether the bellows 5 is sealed. Moreover, the device has a relatively simple structure, is easy for those skilled in the art to use and operate, and has the advantage of low cost.

[0035] Therefore, the specific testing procedure for the bellows leak detection device of this application is as follows:

[0036] 1. An air nozzle is installed at the through hole 1112 of the first sleeve 111. The bellows 5 is installed between the first sleeve 111 and the second sleeve 112. The flange of the bellows 5 is in contact with the sealing element 12.

[0037] 2. Place the assembled corrugated pipe leak detection cylinder 11 into the placement box 21, and screw the handle 223 so that one end of the connecting rod 222 is connected to the second sleeve 112; continue to screw the handle 223 until the abutment 221 clamps the first sleeve 111 and the second sleeve 112 with the side wall (or the first pad 23) on the other side of the placement box 21.

[0038] 3. The air nozzle is sealed and connected to the air pipe. Gas is injected into the bellows leak detection cylinder 11 through the air pipe. The air cylinder is connected to the first cavity and the bellows 5 through the through hole 1112.

[0039] 4. The tooling placement mechanism 2 moves downward through the sliding groove 411 of the fixed plate. The tooling placement mechanism 2 and the corrugated pipe leak detection cylinder 11 are immersed in the water of the test box 3 until the top of the corrugated pipe leak detection cylinder 11 completely touches the water surface.

[0040] 5. Observe whether air bubbles continuously rise to the surface of the water at the inspection hole at the second sleeve 112. If air bubbles continuously appear, the bellows 5 is not sealed properly. If no air bubbles are generated, the bellows 5 is sealed properly.

[0041] In one specific embodiment, the bellows 5 is a hollow cylindrical tube. The end face of the second sleeve 112 that contacts the first sleeve 111 extends outward with a positioning boss 1121. The first sleeve 111 is provided with a positioning groove that matches the positioning boss 1121. The positioning groove is connected to the first cavity.

[0042] In one specific embodiment, a support portion 1122 extends outward from the opposite end face of the second sleeve 112 that contacts the first sleeve 111. The support portion 1122 has a cylindrical structure, and the radial length of the support portion 1122 is less than the radial length of the second sleeve 112.

[0043] In one specific embodiment, the outer side wall of the first sleeve 111 has a mounting plane 1111, which is located around the through hole 1112, on which an air nozzle is mounted.

[0044] In one specific embodiment, the fixed plate body 41 has two or more sliding grooves 411 arranged in parallel, and the sliding grooves 411 are straight grooves. The top of the sliding grooves 411 extends to one side to form a limiting groove 412, which is connected to the sliding grooves 411. The placement box 21 is a rectangular box, and the pushing part 22 is located in the middle of one side of the length direction of the placement box 21. One side wall of the placement box 21 extends to its top with an extension plate 25, and a sliding member 26 matching the sliding grooves 411 is installed on the extension plate 25.

[0045] In this embodiment, by providing two or more parallel sliding grooves 411 on the fixed plate body 41, during the leak detection of the corrugated pipe 5, the tooling placement mechanism 2 can slide along the slide rail to the bottom of the sliding groove 411, so that the tooling placement mechanism 2 and the leak detection tooling are immersed in the water surface of the test box 3, and the sealing performance of the corrugated pipe 5 can be successfully detected. When the leak detection equipment is in the state of detection completed and ready for use, the tooling placement mechanism 2 is slid up along the sliding groove 411 to the top, thereby entering the limiting groove 412 connected to the sliding groove 411. This fixes the tooling placement mechanism 2 in the limiting groove 412 of the fixed plate body 41, always above the test box 3, ensuring that the leak detection components of the corrugated pipe 5 are well integrated, improving the integration, solving the problem of easy loss of small detection components, and making it easy for those skilled in the art to perform leak detection operations.

[0046] In one specific embodiment, the limiting groove 412 extends arcuately at the top of the sliding groove 411, and the end of the limiting groove 412 extending toward the sliding groove 411 is inclined toward the bottom of the fixing plate body 41, or the end of the limiting groove 412 extending toward the sliding groove 411 is vertically toward the bottom of the fixing plate body 41. The sliding groove 411 and the limiting groove 412, which are interconnected, form an inverted "J" shape on the fixing plate body 41.

[0047] In one specific embodiment, the pushing part 22 includes abutting member 221, connecting rod 222 and handle 223. The abutting member 221 has a block structure and is located inside the placement box 21. The end face of the placement box 21 connected to the pushing part 22 is provided with a through hole 1112. The through hole 1112 matches the connecting rod 222. The end of the connecting rod 222 located inside the placement box 21 is equipped with the abutting member 221, and the end of the connecting rod 222 located outside the placement box 21 is equipped with the handle 223.

[0048] By providing a pusher 22 movably connected to one side wall of the placement box 21, and having a pusher component inside the box, after the corrugated pipe 5 is placed into the corrugated pipe 5 leak detection fixture 1, the pusher 22 is used to push the corrugated pipe 5 leak detection fixture 1 from the outside to the inside of the placement box 21 to ensure that the leak detection fixture 1 itself is tightly connected after the corrugated pipe 5 is placed in. The overall structure of the fixture placement mechanism 2 is relatively simple, and it is easy for the practitioner to operate under the premise of being able to meet the requirements of relatively accurate leak detection.

[0049] In one specific embodiment, the abutment 221 and the connecting rod 222 are detachably connected. The abutment 221 has a block structure, and the end face of the abutment 221 that contacts the connecting rod 222 is provided with a split groove 2211. One end of the connecting rod 222 extends into the split groove 2211 and contacts the bottom of the split groove 2211.

[0050] In one specific embodiment, the side panel of the detection box body connected to the fixing plate body is integrally formed with the fixing plate body and is welded and fixed to the detection box body as a whole.

[0051] In one specific embodiment, the leak detection fixture placement mechanism 2 further includes a first pad 23 and a second pad 24. The first pad 23 is fixed inside the placement box 21 and is disposed on the opposite side of the pushing part 22. A first contact groove 231 is formed on the end face of the first pad 23 adjacent to the pushing part 22. The bottom of the first contact groove 231 has an arc-shaped structure. The structure of the first sleeve 111 is adapted to the structure of the first contact groove 231. The second pad 24 is fixed inside the placement box 21 and is disposed on the same side of the placement box 21 as the pushing part 22. A second contact groove 232 is formed in the middle of the second pad 24. The bottom of the second contact groove 232 has an arc-shaped structure. The top of the second contact groove 232 is connected to the upper end face of the second pad 24. The outer contour of the pushing part 22 matches the structure of the second contact groove 232. The outer contour of the support part 1122 matches the structure of the second contact groove 232.

[0052] In one specific embodiment, the detection box 3 is a cuboid box, and the length of the placement box 21 in the longitudinal direction is slightly longer than the length of the extension plate 25 in the longitudinal direction of the placement box 21. A handle 27 is provided on the plate surface of the extension plate 25 adjacent to the placement box 21.

[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A bellows leak detection apparatus characterized by, Includes a testing box, a leak detection fixture placement mechanism, and a corrugated pipe leak detection cylinder; The top of the testing box is open, and a fixing plate body extends upward from the top of one side wall; The leak detection fixture placement mechanism is slidably connected to the main body of the fixing plate; The corrugated pipe leak detection cylinder is installed inside the leak detection fixture placement mechanism; The corrugated pipe leak detection cylinder is formed by splicing a first sleeve and a second sleeve along the axial direction, and the first cavity inside the first sleeve and the second cavity inside the second sleeve together form the corrugated pipe receiving cavity. The first sleeve has a through hole on its side wall, and the through hole is connected to the first cavity. The second sleeve has a detection hole on its side wall, which is connected to the second cavity, and a sealing element is provided at the connection between the first sleeve and the second sleeve. The leak detection fixture placement mechanism includes a placement box and a pushing part; The placement box is mounted on the main body of the fixed plate and can be moved into the detection box. The top of the placement box is open. The pushing part is disposed on the side wall of the placement box that is not adjacent to the fixing plate, and the pushing part is movably connected to the placement box; The pusher and the placement box are provided with the opposite side wall of the pusher, which can clamp and fix the corrugated pipe detection cylinder.

2. The corrugated pipe leak detection device according to claim 1, characterized in that, The bellows is a hollow cylindrical tube. The end face of the second sleeve that contacts the first sleeve extends outward with a positioning boss, and the first sleeve is provided with a positioning groove that matches the positioning boss, and the positioning groove communicates with the first cavity.

3. The corrugated pipe leak detection device according to claim 1, characterized in that, The second sleeve has a support portion extending outward from the opposite end face that contacts the first sleeve; The support portion has a cylindrical structure, and the radial length of the support portion is less than the radial length of the second sleeve.

4. The corrugated pipe leak detection device according to any one of claims 1-3, characterized in that, The outer wall of the first sleeve has a mounting surface, which is located around the through hole; An air nozzle is installed on the through hole.

5. The corrugated pipe leak detection device according to claim 1, characterized in that, The main body of the fixing plate has two or more sliding grooves arranged in parallel, and the sliding grooves are straight strip-shaped grooves. The top of the sliding groove extends to one side into a limiting groove, which is connected to the sliding groove. The placement box is a rectangular box, and the pushing part is located in the middle of one side of the placement box along its length. An extension plate extends from the top of one side wall of the placement box along its length. The extension plate is equipped with a sliding element that matches the sliding groove.

6. The corrugated pipe leak detection device according to claim 5, characterized in that, The limiting groove extends arc-shaped at the top of the sliding groove, and the end of the limiting groove extending to one side of the sliding groove is inclined toward the bottom of the fixing plate body, or the end of the limiting groove extending to one side of the sliding groove is vertically toward the bottom of the fixing plate body. The interconnected sliding groove and the limiting groove form an inverted "J" shape on the main body of the fixed plate.

7. The corrugated pipe leak detection device according to any one of claims 1-3, 5, and 6, characterized in that, The pushing part includes a pressing member, a connecting rod, and a handle; The abutting component has a block-shaped structure and is located inside the placement box; The end face of the placement box connected to the pushing part has a through hole, which matches the connecting rod. The end of the connecting rod inside the placement box is equipped with the abutting member, and the end of the connecting rod outside the placement box is equipped with the handle.

8. The corrugated pipe leak detection device according to claim 7, characterized in that, The abutment is detachably connected to the connecting rod; The abutment member has a block-shaped structure, and the end face of the abutment member that contacts the connecting rod is provided with a split groove; One end of the connecting rod extends into the split groove and contacts the bottom of the split groove.

9. The corrugated pipe leak detection device according to claim 3, characterized in that, The leak detection fixture placement mechanism also includes a first pad and a second pad; The first pad is fixed inside the placement box. The first pad is located on the opposite side of the pushing part, and a first contact groove is formed on the end face of the first pad adjacent to the pushing part. The bottom of the first contact groove has an arc surface structure. The structure of the first sleeve is adapted to that of the first contact groove; The second pad is fixed inside the placement box, and the second pad and the pushing part are arranged on the same side of the placement box. A second contact groove is provided in the middle of the second pad, and the bottom of the second contact groove has an arc surface structure. The top of the second contact groove is connected to the upper end surface of the second pad. The outer contour of the pushing part matches the structure of the second contact groove; The outer contour of the support portion matches the structure of the second contact groove.

10. The corrugated pipe leak detection device according to claim 5, characterized in that, The testing box is a cuboid box; The length of the placement box in the longitudinal direction is slightly longer than the length of the extension plate in the longitudinal direction of the placement box; A handle is provided on the surface of the extension plate adjacent to the placement box.

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