An airtightness rapid detection tooling

Abstract

The present invention relates to the technical field of airtightness detection, specifically a rapid airtightness detection tooling, which includes a detection box. A detection structure is installed on the detection box, a pressurization structure is installed on the side end of the detection structure, a limiting structure is installed on the side end of the detection box, a positioning structure is installed inside the detection box, a temperature adjustment structure is installed at the bottom end of the detection box, and a placement structure is installed at the bottom end of the detection box; through the detection structure installed on the detection box, the airtightness of the elbow for sewer can be detected. At the same time, through the pressurization structure, the inside of the elbow is pressurized, which can better detect the airtightness of the elbow. Through the limiting structure installed on the detection box, when detecting the airtightness of the elbow, the airtightness of the three-way elbow can also be detected. At the same time, the positioning structure can fix the limiting structure.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection, and specifically relates to a rapid airtightness detection tooling. Background Art

[0002] During the production process of sewer elbows, it is necessary to detect the airtightness of the elbows to ensure the product quality of the elbows, so that the elbows can be used for a long time in complex and harsh environments. Currently, the common airtightness tests are completed manually.

[0003] However, when detecting the airtightness of the elbows, generally normal-temperature water is used for detection. However, the sewer usually contains water with higher and lower temperatures, so the influence of temperature on the elbows cannot be detected. Moreover, when using hot water and ice water for testing, since most of the operations are manual, the water used for detection being too hot or too cold will cause harm to the workers. And during the use process, the air pressure inside the elbows is also different. Therefore, when the pressure is too high, the elbows will rupture, affecting normal use. Summary of the Invention

[0004] Aiming at the problems in the prior art, the present invention provides a rapid airtightness detection tooling.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a rapid airtightness detection tooling, including a detection box, a detection structure is installed on the detection box, a pressurization structure is installed at the side end of the detection structure, a limiting structure is installed at the side end of the detection box, a positioning structure is installed inside the detection box, a temperature adjustment structure is installed at the bottom end of the detection box, and a placement structure is installed at the bottom end of the detection box;

[0006] The detection structure includes an electric telescopic rod, an electric telescopic rod is installed inside the detection box, a connecting rod is fixedly connected to the top end of the electric telescopic rod, a fixed plug is fixedly connected to the side end of the connecting rod, the fixed plug is connected to a pipeline, a sealing plug is detachably connected to the top end of the pipeline, and a fixed rod is fixedly connected to the top end of the sealing plug.

[0007] Specifically, the pressurization structure includes a fixed sleeve, a fixed sleeve is fixedly connected to the side end of the connecting rod, a connecting pipe is fixedly connected inside the fixed sleeve, and the connecting pipe penetrates and is connected to the fixed plug.

[0008] Specifically, a contact block is slidably connected to the side end of the fixed sleeve, the contact block abuts against the detection box, and a first spring is fixedly connected between the contact block and the fixed sleeve.

[0009] Specifically, the limiting structure includes a slide plate, the side end of the detection box is slidably connected to the slide plate, the slide plate is fixedly connected to a fixing seat, the fixing seat is slidably connected to a slide rod, and the side end of the slide rod is fixedly connected to a limiting plug.

[0010] Specifically, a fixing plate is fixedly connected to the sliding rod, the fixing plate is slidably connected to the fixing seat, and a second spring is fixedly connected between the fixing plate and the fixing seat.

[0011] Specifically, the positioning structure includes a resistance rod, a resistance rod is slidably connected inside the detection box, a clamping block is slidably connected inside the detection box, the resistance rod and the clamping block are engaged, a clamping groove is provided at the side end of the slide plate, the clamping block and the clamping groove are engaged, and a third spring is fixedly connected between the detection box and the clamping block.

[0012] Specifically, a pressure block is fixedly connected to the top end of the resistance rod, the pressure block is slidably connected to the detection box, and a fourth spring is fixedly connected between the pressure block and the detection box.

[0013] Specifically, the temperature regulating structure includes a temperature conducting plate, the temperature conducting plate is fixedly connected in the detection box, a rotating sleeve is rotatably connected in the detection box, a heating tube is installed in the rotating sleeve, and a condensing tube is installed in the rotating sleeve.

[0014] Specifically, the side end of the rotating sleeve is fixedly connected with a fixed shaft, the fixed shaft and the detection box are rotatably connected, a plurality of fixed grooves are provided in the fixed shaft, a fixed column is slidably connected in the detection box, the fixed groove and the fixed column are plugged into each other, a slider is fixedly connected to the bottom end of the fixed column, and a fifth spring is fixedly connected between the slider and the detection box.

[0015] Specifically, the placement structure includes a placement plate, the bottom end of the detection box is slidably connected to the placement plate, the side end of the placement plate is fixedly connected to a limit rod, the limit rod and the detection box are slidably connected, a protrusion is fixedly connected inside the detection box, and the protrusion is engaged with the limit rod.

[0016] The beneficial effects of the present invention are:

[0017] (1) An airtightness rapid detection tooling according to the present invention can detect the airtightness of a bent pipe for sewer use through a detection structure installed on a detection box. At the same time, through a pressurization structure, the inside of the bent pipe is pressurized, which can better detect the airtightness of the bent pipe. That is, when it is necessary to detect the airtightness of the bent pipe, first install one end of the bent pipe on a fixed plug, and then install a sealing plug on the other end of the bent pipe. Therefore, the two ends of the bent pipe can be sealed. The fixed rod fixed on the sealing plug can facilitate the removal of the sealing plug from the bent pipe. Then, add water into the detection box and start the electric telescopic rod, which can drive the connecting rod and the fixed plug to slide downward, thereby driving the bent pipe to slide downward. Therefore, by observing whether there are bubbles on the bent pipe, it can be judged whether the airtightness of the bent pipe is qualified. When the connecting rod slides downward, it can drive the fixed sleeve to slide downward. When the abutting block abuts against the detection box, it can drive the abutting block to slide in the fixed sleeve. Therefore, the extrusion of the abutting block can convey the gas in the fixed sleeve to the inside of the bent pipe through the connecting pipe, thereby pressurizing the inside of the bent pipe, and it can better observe whether there are bubbles generated. Therefore, it can better detect whether the airtightness of the bent pipe is qualified. Through the elastic force of the first spring, when the abutting block and the detection box no longer abut, it can drive the abutting block to slide back to its original position.

[0018] (2) An airtightness rapid detection tooling according to the present invention can detect the airtightness of a three-way bent pipe when detecting the airtightness of a bent pipe through a limiting structure installed on a detection box. At the same time, a positioning structure can fix the limiting structure. That is, when it is necessary to detect the airtightness of the three-way bent pipe, after fixing the three-way bent pipe, pressing the pressing block can drive the abutting rod to slide in the detection box. Since the abutting rod is engaged with the block, it can drive the block to slide. When the block is separated from the card slot, the slide plate can be adjusted up and down. After adjusting until the limiting plug is flush with the three-way bent pipe, pull the limiting plug and the three-way bent pipe to be inserted, so that the three-way bent pipe can be sealed. When it is not necessary to detect the three-way bent pipe, through the elastic force of the second spring fixed on the fixed piece, it can drive the sliding rod to slide to reset the limiting plug. Since the slide plate slides on the side end of the detection box, when the three-way bent pipe slides up and down, it can also drive the whole fixed seat to slide up and down.

[0019] (3) The airtightness rapid detection tooling described in the present invention can heat and cool the water for detecting the bent pipe through the temperature adjustment structure installed inside the detection box, so as to detect whether high-temperature water and low-temperature water will affect the airtightness of the bent pipe. Through the placement structure, the bent pipe can be placed in a high-temperature environment and a low-temperature environment, so as to better detect the airtightness of the bent pipe. That is, when detecting the bent pipe, push the slider downward, which can drive the fixed column fixed on the slider to slide downward. When the fixed column and the fixed groove are separated, the rotating sleeve can be rotated and adjusted. When the heating pipe faces upward, the water for detecting the airtightness of the bent pipe can be heated through the heat conduction plate. When the condensing pipe faces upward, the water can be cooled. Therefore, the airtightness of the bent pipe can be detected according to different environments. The elastic force of the fifth spring can prevent the fixed column and the fixed groove from automatically separating. When the bent pipe is placed on the placement plate, it can be detected whether the high temperature and low temperature directly affect the airtightness of the bent pipe. By sliding the limiting rod fixed on the placement plate inside the detection box, the overall placement plate can be prevented from sliding out of the detection box. At the same time, through the engagement of the protrusion and the limiting rod, the placement plate can be limited and fixed to prevent the placement plate from automatically sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the airtightness rapid detection tooling provided by the present invention;

[0022] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of part A shown in;

[0023] Figure 3 is Figure 1 an enlarged schematic diagram of the structure of part B shown in;

[0024] Figure 4 It is a schematic diagram of the connection structure between the detection box and the placement plate of the present invention;

[0025] Figure 5 is Figure 4 an enlarged schematic diagram of the structure of part C shown in;

[0026] Figure 6 is Figure 4 an enlarged schematic diagram of the structure of part D shown in;

[0027] Figure 7 is Figure 4 an enlarged schematic diagram of the structure of part E shown in;

[0028] Figure 8 is Figure 4 an enlarged schematic diagram of the structure of part F shown in.

[0029] In the figure: 1, detection box; 2, detection structure; 201, electric telescopic rod; 202, connecting rod; 203, fixing plug; 204, sealing plug; 205, fixing rod; 3, pressurizing structure; 301, fixing sleeve; 302, connecting pipe; 303, abutting block; 304, first spring; 4, limiting structure; 401, sliding plate; 402, fixing seat; 403, sliding rod; 404, limiting plug; 405, fixing piece; 406, second spring; 5, positioning structure; 501, abutting rod; 502, clamping block; 503, clamping groove; 504, third spring; 505, pressing block; 506, fourth spring; 6, temperature adjustment structure; 601, heat conduction plate; 602, rotating sleeve; 603, heating pipe; 604, condensing pipe; 605, fixing shaft; 606, fixing groove; 607, fixing column; 608, slider; 609, fifth spring; 7, placing structure; 701, placing plate; 702, limiting rod; 703, protrusion. Specific embodiments

[0030] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0031] As Figures 1-8 shown, a quick airtightness detection tooling of the present invention includes a detection box 1, a detection structure 2 is installed on the detection box 1, a pressurizing structure 3 is installed on the side end of the detection structure 2, a limiting structure 4 is installed on the side end of the detection box 1, a positioning structure 5 is installed inside the detection box 1, a temperature adjustment structure 6 is installed at the bottom end of the detection box 1, and a placing structure 7 is installed at the bottom end of the detection box 1;

[0032] The detection structure 2 includes an electric telescopic rod 201. The electric telescopic rod 201 is installed inside the detection box 1. The top end of the electric telescopic rod 201 is fixedly connected to a connecting rod 202. The side end of the connecting rod 202 is fixedly connected to a fixing plug 203. The fixing plug 203 is connected to a pipeline. The top end of the pipeline is detachably connected to a sealing plug 204. The top end of the sealing plug 204 is fixedly connected to a fixing rod 205. When it is necessary to detect the airtightness of a bent pipe, first install one end of the bent pipe on the fixing plug 203, and then install the sealing plug 204 on the other end of the bent pipe. Therefore, the two ends of the bent pipe can be sealed. The fixing rod 205 fixed on the sealing plug 204 can facilitate the removal of the sealing plug 204 from the bent pipe. Then add water into the detection box 1 and start the electric telescopic rod 201, which can drive the connecting rod 202 and the fixing plug 203 to slide downward, so as to drive the bent pipe to slide downward. Therefore, by observing whether there are bubbles on the bent pipe, it can be judged whether the airtightness of the bent pipe is qualified.

[0033] Specifically, the pressurizing structure 3 includes a fixed sleeve 301. The side end of the connecting rod 202 is fixedly connected to the fixed sleeve 301. A connecting pipe 302 is fixedly connected inside the fixed sleeve 301. The connecting pipe 302 and the fixed plug 203 are connected through. The side end of the fixed sleeve 301 is slidably connected to a contact block 303. The contact block 303 abuts against the detection box 1. A first spring 304 is fixedly connected between the contact block 303 and the fixed sleeve 301. When the connecting rod 202 slides downward, it can drive the fixed sleeve 301 to slide downward. When the contact block 303 abuts against the detection box 1, it can drive the contact block 303 to slide inside the fixed sleeve 301. Therefore, the extrusion of the contact block 303 can convey the gas in the fixed sleeve 301 to the elbow through the connecting pipe 302, so as to pressurize the inside of the elbow, and it can be better observed whether bubbles are generated. Therefore, it can better detect whether the airtightness of the elbow is qualified. Through the elastic force of the first spring 304, when the contact block 303 and the detection box 1 no longer abut, it can drive the contact block 303 to slide back to its original position.

[0034] Specifically, the limiting structure 4 includes a sliding plate 401. The side end of the detection box 1 is slidably connected to the sliding plate 401. A fixed seat 402 is fixedly connected to the sliding plate 401. A sliding rod 403 is slidably connected inside the fixed seat 402. A limiting plug 404 is fixedly connected to the side end of the sliding rod 403. A fixed piece 405 is fixedly connected to the sliding rod 403. The fixed piece 405 is slidably connected to the fixed seat 402. A second spring 406 is fixedly connected between the fixed piece 405 and the fixed seat 402. After adjusting until the limiting plug 404 is flush with the three-way elbow, pull the limiting plug 404 to insert it into the three-way elbow. Therefore, the three-way elbow can be sealed. When the three-way elbow does not need to be detected, through the elastic force of the second spring 406 fixed on the fixed piece 405, it can drive the sliding rod 403 to slide to reset the limiting plug 404. Since the sliding plate 401 slides on the side end of the detection box 1, when the three-way elbow slides up and down, it can also drive the entire fixed seat 402 to slide up and down.

[0035] Specifically, the positioning structure 5 includes a resisting rod 501, a resisting rod 501 is slidably connected in the detection box 1, a block 502 is slidably connected in the detection box 1, the resisting rod 501 and the block 502 are engaged, a slot 503 is provided at the side end of the slide plate 401, the block 502 and the slot 503 are engaged, a third spring 504 is fixedly connected between the detection box 1 and the block 502, a pressing block 505 is fixedly connected to the top of the resisting rod 501, and the The pressing block 505 is slidably connected to the detection box 1, and a fourth spring 506 is fixedly connected between the pressing block 505 and the detection box 1. When the air tightness of the three-way elbow needs to be tested, after the three-way elbow is fixed, pressing the pressing block 505 can drive the resistance rod 501 to slide in the detection box 1. Since the resistance rod 501 and the clamping block 502 are engaged, the clamping block 502 can be driven to slide. When the clamping block 502 and the clamping slot 503 are separated, the slide plate 401 can be adjusted up and down.

[0036] Specifically, the temperature adjustment structure 6 includes a temperature conducting plate 601, a temperature conducting plate 601 is fixedly connected in the detection box 1, a rotating sleeve 602 is rotatably connected in the detection box 1, a heating tube 603 is installed in the rotating sleeve 602, a condensing tube 604 is installed in the rotating sleeve 602, a fixed shaft 605 is fixedly connected to the side end of the rotating sleeve 602, the fixed shaft 605 is rotatably connected to the detection box 1, a plurality of fixed grooves 606 are provided in the fixed shaft 605, a fixed column 607 is slidably connected in the detection box 1, the fixed groove 606 and the fixed column 607 are plugged, a slider 608 is fixedly connected to the bottom end of the fixed column 607, and the slider A fifth spring 609 is fixedly connected between the block 608 and the detection box 1. When the bent pipe is detected, the slider 608 is pushed downward, thereby driving the fixed column 607 fixed on the slider 608 to slide downward. When the fixed column 607 and the fixed groove 606 are separated, the rotating sleeve 602 can be rotated and adjusted. When the heating tube 603 is facing upward, the water for detecting the air tightness of the bent pipe can be heated through the heat conduction plate 601. When the condenser 604 is facing upward, the water can be cooled. Therefore, the air tightness of the bent pipe can be detected according to different environments. The elastic force of the fifth spring 609 can prevent the fixed column 607 and the fixed groove 606 from automatically separating.

[0037] Specifically, the placement structure 7 includes a placement plate 701. The bottom end of the detection box 1 is slidably connected to the placement plate 701. A limiting rod 702 is fixedly connected to the side end of the placement plate 701. The limiting rod 702 is slidably connected to the detection box 1. A protrusion 703 is fixedly connected inside the detection box 1. The protrusion 703 is engaged with the limiting rod 702. When the elbow is placed on the placement plate 701, it can be detected whether the high temperature and low temperature directly affect the airtightness of the elbow. By sliding the limiting rod 702 fixed on the placement plate 701 inside the detection box 1, it is possible to prevent the entire placement plate 701 from sliding out of the detection box 1. At the same time, by engaging the protrusion 703 with the limiting rod 702, the placement plate 701 can be limited and fixed to prevent the placement plate 701 from automatically sliding.

[0038] When the present invention is in use and it is necessary to detect the airtightness of a bent pipe, first, one end of the bent pipe is installed on the fixed plug 203, and then the sealing plug 204 is installed at the other end of the bent pipe. Thus, both ends of the bent pipe can be sealed. The fixed rod 205 fixed on the sealing plug 204 facilitates the removal of the sealing plug 204 from the bent pipe. Then, water is added to the detection box 1, and the electric telescopic rod 201 is started, which can drive the connecting rod 202 and the fixed plug 203 to slide downward, thereby driving the bent pipe to slide downward. Therefore, by observing whether there are bubbles on the bent pipe, it can be judged whether the airtightness of the bent pipe is qualified. When the connecting rod 202 slides downward, it can drive the fixed sleeve 301 to slide downward. When the abutting block 303 abuts against the detection box 1, it can drive the abutting block 303 to slide within the fixed sleeve 301. Therefore, the extrusion of the abutting block 303 can convey the gas in the fixed sleeve 301 to the bent pipe through the connecting pipe 302, thereby pressurizing the inside of the bent pipe and enabling better observation of whether there are bubbles generated. Thus, it can better detect whether the airtightness of the bent pipe is qualified. Through the elasticity of the first spring 304, when the abutting block 303 no longer abuts against the detection box 1, it can drive the abutting block 303 to slide back to its original position. When it is necessary to detect the airtightness of a three-way bent pipe, after the three-way bent pipe is fixed, pressing the pressing block 505 can drive the abutting rod 501 to slide within the detection box 1. Since the abutting rod 501 is engaged with the clamping block 502, it can drive the clamping block 502 to slide. When the clamping block 502 is separated from the clamping groove 503, the sliding plate 401 can be adjusted up and down. After adjusting until the limiting plug 404 is flush with the three-way bent pipe, pulling the limiting plug 404 to insert it into the three-way bent pipe can seal the three-way bent pipe. When it is not necessary to detect the three-way bent pipe, through the elasticity of the second spring 406 fixed on the fixed piece 405, it can drive the sliding rod 403 to slide to reset the limiting plug 404. Since the sliding plate 401 slides on the side of the detection box 1, when the three-way bent pipe slides up and down, it can also drive the entire fixed seat 402 to slide up and down. When detecting the bent pipe, pushing the slider 608 downward can drive the fixed column 607 fixed on the slider 608 to slide downward. When the fixed column 607 is separated from the fixed groove 606, the rotating sleeve 602 can be rotated and adjusted. When the heating pipe 603 faces upward, the water for detecting the airtightness of the bent pipe can be heated through the heat conduction plate 601. When the condensing pipe 604 faces upward, the water can be cooled. Therefore, the airtightness of the bent pipe can be detected according to different environments. Through the elasticity of the fifth spring 609, it can prevent the fixed column 607 and the fixed groove 606 from automatically separating. When the bent pipe is placed on the placement plate 701, it can be detected whether high temperature and low temperature directly affect the airtightness of the bent pipe. By the limiting rod 702 fixed on the placement plate 701 sliding within the detection box 1, it can prevent the entire placement plate 701 from sliding out of the detection box 1. At the same time, through the engagement of the protrusion 703 and the limiting rod 702, the placement plate 701 can be limited and fixed.Prevent the placement plate 701 from sliding automatically.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference numerals in the claims should not be construed as limiting the claims involved.

[0040] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An airtightness rapid detection tooling, characterized in that It includes a detection box (1), a detection structure (2) is installed on the detection box (1), a pressurization structure (3) is installed on the side end of the detection structure (2), a limiting structure (4) is installed on the side end of the detection box (1), a positioning structure (5) is installed inside the detection box (1), a temperature adjustment structure (6) is installed at the bottom end of the detection box (1), and a placement structure (7) is installed at the bottom end of the detection box (1); The detection structure (2) includes an electric telescopic rod (201). The electric telescopic rod (201) is installed inside the detection box (1). The top end of the electric telescopic rod (201) is fixedly connected to a connecting rod (202). A fixing plug (203) is fixedly connected to the side end of the connecting rod (202). The fixing plug (203) is connected to a pipeline. The top end of the pipeline is detachably connected to a sealing plug (204). The top end of the sealing plug (204) is fixedly connected to a fixing rod (205); The pressurization structure (3) includes a fixing sleeve (301). The fixing sleeve (301) is fixedly connected to the side end of the connecting rod (202). A connecting pipe (302) is fixedly connected inside the fixing sleeve (301). The connecting pipe (302) is connected through the fixing plug (203); A resisting block (303) is slidably connected to the side end of the fixing sleeve (301). The resisting block (303) abuts against the detection box (1). A first spring (304) is fixedly connected between the resisting block (303) and the fixing sleeve (301); The limiting structure (4) includes a sliding plate (401). The sliding plate (401) is slidably connected to the side end of the detection box (1). A fixing seat (402) is fixedly connected to the sliding plate (401). A sliding rod (403) is slidably connected inside the fixing seat (402). A limiting plug (404) is fixedly connected to the side end of the sliding rod (403); A fixing piece (405) is fixedly connected to the sliding rod (403). The fixing piece (405) is slidably connected to the fixing seat (402). A second spring (406) is fixedly connected between the fixing piece (405) and the fixing seat (402); The positioning structure (5) includes a resisting rod (501). The resisting rod (501) is slidably connected inside the detection box (1). A clamping block (502) is slidably connected inside the detection box (1). The resisting rod (501) is engaged with the clamping block (502). A clamping groove (503) is provided at the side end of the sliding plate (401). The clamping block (502) is engaged with the clamping groove (503). A third spring (504) is fixedly connected between the detection box (1) and the clamping block (502); The top end of the resisting rod (501) is fixedly connected to a pressing block (505). The pressing block (505) is slidably connected to the detection box (1). A fourth spring (506) is fixedly connected between the pressing block (505) and the detection box (1); The placement structure (7) includes a placement plate (701). The bottom end of the detection box (1) is slidably connected to the placement plate (701). A limiting rod (702) is fixedly connected to the side end of the placement plate (701). The limiting rod (702) is slidably connected to the detection box (1). A protrusion (703) is fixedly connected inside the detection box (1). The protrusion (703) is engaged with the limiting rod (702).

2. The airtightness rapid detection tooling according to claim 1, wherein: The temperature adjustment structure (6) includes a heat conduction plate (601). The heat conduction plate (601) is fixedly connected inside the detection box (1). A rotating sleeve (602) is rotatably connected inside the detection box (1). A heating pipe (603) is installed inside the rotating sleeve (602). A condensation pipe (604) is installed inside the rotating sleeve (602).

3. The airtightness rapid detection tooling according to claim 2, wherein: A fixed shaft (605) is fixedly connected to the side end of the rotating sleeve (602). The fixed shaft (605) is rotatably connected to the detection box (1). A plurality of fixed grooves (606) are provided inside the fixed shaft (605). A fixed column (607) is slidably connected inside the detection box (1). The fixed groove (606) is inserted with the fixed column (607). A slider (608) is fixedly connected to the bottom end of the fixed column (607). A fifth spring (609) is fixedly connected between the slider (608) and the detection box (1).

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