Testing devices and methods for easily testing the sealing performance of pipe joints

Abstract

This invention belongs to the field of sealing performance testing technology, and relates to a testing device and method for easily testing the sealing performance of pipe joints. The device includes a testing platform, a clamping sealing mechanism, a gas path control mechanism, a support assembly, and a selection assembly. The bottom of the testing platform has a first through hole and a second through hole. The gas path control mechanism includes two exhaust channels communicating with the testing chamber, each equipped with an electrically controlled valve. Based on the test results, the corresponding electrically controlled valve is opened, allowing the gas in the testing chamber to be discharged through the corresponding exhaust channel. Upon discharge, the gas impacts the connecting plate, causing the first support block and the corresponding second support block to magnetically pair. When the first support block descends, it drives the magnetically attracted second support block downwards, while the other second support block remains at its initial high position. This allows the pipe joint and fittings to fall along the guide ramp onto the corresponding conveying device, thereby achieving automatic sorting of qualified and unqualified products.

Description

Technical Field

[0001] This invention belongs to the field of sealing test technology, and relates to a test device and test method for easily testing the sealing performance of pipe joints. Background Technology

[0002] As a critical connecting component in fluid transport systems, the sealing performance of pipe fittings directly affects the safety and reliability of the system. Therefore, rigorous sealing tests on pipe fittings before leaving the factory or during use are an essential procedure.

[0003] Currently, most common methods for leak detection employ pneumatic testing, which involves filling a sealed cavity formed by pipe joints, end fittings, and sealing plugs with gas at a certain pressure and monitoring the pressure drop to determine if a leak exists. Current testing devices often focus solely on the detection function itself, lacking effective integrated solutions for the subsequent automatic sorting of qualified and unqualified products. This failure to achieve full automation from detection to sorting hinders the overall efficiency of the production line.

[0004] For example, patent document CN111413051A discloses a pipeline airtightness testing device that can automatically clamp and perform inflation testing. However, after the test is completed, this type of device does not integrate an automatic product classification function based on the test results. The separation of qualified and unqualified products remains a separate step that requires additional equipment or manual processing, which is not conducive to improving production efficiency.

[0005] To address the above problems, this invention proposes a testing device and method for easily detecting the sealing performance of pipe joints. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a testing device and testing method for easily detecting the sealing performance of pipe joints.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A testing device for facilitating the inspection of pipe joint sealing performance includes: The testing platform has a first through hole and a second through hole at its bottom; The clamping and sealing mechanism on the testing platform is used to clamp the pipe fittings at both ends of the pipe joint to be tested and form a closed testing chamber. It is equipped with an air inlet and a pressure sensor. The gas path control mechanism includes two exhaust channels that are respectively connected to the detection chamber, and each exhaust channel is equipped with an electrically controlled valve; The support assembly includes a first support block and two second support blocks disposed on both sides of the upper end of the first support block. The two second support blocks together form a positioning surface for receiving pipe joints. Both the first support block and the second support block are movably disposed within the testing table. A selection component, disposed on the first support block, which operates in response to gas ejected from the exhaust channel, is used to selectively connect the first support block to one of the second support blocks. When the pipe joint's sealing performance is qualified, the first support block connects to the second support block near the second through hole and descends to form a guide slope, allowing the pipe joint to be discharged from the first through hole; when the sealing performance is unqualified, the first support block connects to the second support block near the first through hole and descends to form a guide slope, allowing the pipe joint to be discharged from the second through hole.

[0009] Furthermore, the selection component includes a connecting plate, the first support block has an installation cavity, a rotating shaft is rotatably installed in the installation cavity, one end of the connecting plate is fixedly connected to the rotating shaft, the other end of the connecting plate is fixedly connected to a first magnet, a second magnet is installed on the side of the second support block that cooperates with the first support block, and the second magnet and the first magnet are magnetically attracted to each other.

[0010] Furthermore, two blocks are fixedly connected to the inner wall of the mounting cavity, and the connecting plate is located between the two blocks.

[0011] Furthermore, connecting pipes are installed on both sides of the first support block. One end of the connecting pipe extends into the mounting cavity, and the other end is matched with the outlet end of the exhaust channel; the gas in the exhaust channel is ejected through the connecting pipe.

[0012] Furthermore, the clamping sealing mechanism includes: A fixed base is fixed to one end of the testing table; the exhaust channel extends to the fixed base and passes through the end face of the fixed base; The sliding seat is movably positioned at the other end of the testing platform. The air inlet and the air pressure sensor are both located on the end face of the sliding seat, and an air inlet pipe communicating with the air inlet is provided on it. The cylinder is mounted on the testing platform, and its telescopic end is fixedly connected to the sliding seat; it drives the sliding seat to move closer to or away from the fixed seat.

[0013] Furthermore, a rubber layer is provided on the end faces of both the fixed seat and the sliding seat.

[0014] Furthermore, the first support block is fixedly connected to a first slider, and the detection platform is equipped with an electrically controlled slide rail that drives the first slider to rise and fall.

[0015] Furthermore, the second support block is fixedly connected to a second slider, one end of which is slidably disposed in a groove opened on the inner wall of the testing platform. A third magnet is fixedly connected to the second slider, and an iron block that is attracted and cooperates with the third magnet is fixedly connected to the top wall of the groove.

[0016] Furthermore, both sides of the testing platform are provided with conveying devices, one of which is configured to cooperate with the first through hole, and the other conveying device is configured to cooperate with the second through hole.

[0017] The method for detecting the sealing performance of pipe joints in this invention includes the following steps: S1. Install pipe fittings at both ends of the pipe joint, and place the assembled pipe joint and fittings onto the positioning surface; S2. Activate the clamping and sealing mechanism, which clamps the pipe fitting and seals its end; the pipe joint, pipe fitting, and clamping and sealing mechanism form a closed detection chamber. S3. Inflate the detection chamber with air; monitor the air pressure in the detection chamber using an air pressure sensor to determine whether the pipe joint is qualified; S4. Pipe joint qualified: The electrically controlled valve on the same side as the first through hole opens, and the gas in the detection chamber enters the exhaust channel on the same side as the first through hole. The gas drives the selection component to move, so that the first support block connects with the second support block on the same side as the second through hole; the first support block is controlled to descend, and the pipe joint is discharged from the first through hole. Pipe joint defective: The electrically controlled valve on the same side as the second through hole opens, and the gas in the detection chamber enters the exhaust channel on the same side as the second through hole. The gas drives the selection component to operate, so that the first support block connects with the second support block on the same side as the first through hole; the first support block is controlled to descend, and the pipe joint is discharged from the second through hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects: After the test is completed, the corresponding electrically controlled valve is opened based on the test results, so that the gas in the test chamber is discharged through the corresponding exhaust channel. When it is discharged, it impacts the connecting plate, thereby causing the first support block to be magnetically connected to the corresponding second support block. When the first support block descends, it drives the magnetically connected second support block to move down, while the other second support block remains in the initial high position, so that the pipe joints and fittings fall onto the corresponding conveying device along the guide slope, thereby realizing the automatic sorting of qualified and unqualified products.

[0019] This device integrates the sealing performance assessment and product sorting processes. It can automatically determine whether a product is qualified or not based on data monitored by a pressure sensor, and then trigger subsequent sorting actions. The entire process, from clamping and sealing, inflation detection, result assessment to classification and discharge, requires no manual intervention, truly realizing an automated process of detection-judgment-sorting, which helps to improve the automation level of the production line and the overall operational efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first perspective; Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective; Figure 3 This is a schematic diagram of the state when the pipe joint is inspected according to the present invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a schematic diagram of the structure of the first support block and the second support block in this invention; Figure 6 This is a schematic diagram of the state of the support assembly when the pipe joint is qualified in this invention; Figure 7 This is a schematic diagram of the support assembly when the pipe joint is defective in this invention.

[0021] In the diagram: 1. Testing platform; 2. First through hole; 3. Second through hole; 4. Conveying device; 5. First support block; 6. First slider; 7. Electrically controlled slide rail; 8. Rotating shaft; 9. Connecting plate; 10. First magnet; 11. Stop block; 12. Connecting pipe; 13. Second support block; 14. Second magnet; 15. Second slider; 16. Third magnet; 17. Slide groove; 18. Fixed seat; 19. Exhaust channel; 20. Electrically controlled valve; 21. Cylinder; 22. Sliding seat; 23. Inlet pipe; 24. Inlet hole; 25. Pressure sensor; 26. Pipe joint; 27. Pipe fitting. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-7 As shown, the technical solution adopted by the present invention is as follows: the testing device for facilitating the testing of the sealing performance of pipe joints includes a testing platform 1, a clamping sealing mechanism, an air path control mechanism, a support assembly, and a selection assembly.

[0024] The testing platform 1 serves as the base of the device, and its interior is a hollow structure. A first through-hole 2 and a second through-hole 3 are respectively opened on both sides of the bottom of the testing platform 1, serving as different discharge channels for qualified and unqualified products. In this embodiment, qualified products are discharged through the first through-hole 2, and unqualified products are discharged through the second through-hole 3. Conveying devices 4 are also installed on both sides of the testing platform 1 to transport the discharged pipe joints 26 to the next process or collection area. One conveying device 4 is corresponding to the first through-hole 2 and is used to transport qualified products. The other conveying device 4 is corresponding to the second through-hole 3 and is used to transport unqualified products.

[0025] A support assembly is located inside the testing table 1 to receive and position the pipe joint 26 to be tested. The support assembly includes a first support block 5 and two second support blocks 13. The first support block 5 has inclined surfaces on both sides. The second support blocks 13 have a triangular cross-section. The two second support blocks 13 are located on either side of the first support block 5 and engage with the corresponding inclined surfaces. The upper surfaces of the two second support blocks 13 together form a V-shaped positioning surface for stably supporting the pipe joint 26 to be tested and the fittings 27 installed at both ends.

[0026] In this embodiment, as Figure 4 , Figure 6 , Figure 7 As shown, the first through hole 2 is located on the left side of the testing platform 1, and the second through hole 3 is located on the right side of the testing platform 1.

[0027] The inclined surface on the left side of the first support block 5 is flush with the upper surface of the second support block 13 on the right side. When the first support block 5 and the second support block 13 on the right side move down at the same time, while the second support block 13 on the left side remains in a high position, the inclined surface on the left side of the first support block 5 and the upper surface of the second support block 13 on the right side form a guide slope corresponding to the first through hole 2, so that the qualified pipe joint 26 after inspection falls down along the guide slope and is discharged through the first through hole 2.

[0028] The inclined surface on the right side of the first support block 5 is flush with the upper surface of the second support block 13 on the left. When the first support block 5 and the second support block 13 on the left move down simultaneously, while the second support block 13 on the right remains in a high position, the inclined surface on the right side of the first support block 5 and the upper surface of the second support block 13 on the left form a guide slope corresponding to the second through hole 3, causing the unqualified pipe joint 26 to fall along the guide slope and be discharged through the second through hole 3. This achieves automatic sorting of qualified and unqualified products.

[0029] Both sides of the first support block 5 are fixedly connected to the first slider 6. The first slider 6 is slidably connected to the electrically controlled slide rail 7 that is vertically installed on the inner wall of the testing table 1, so that the first support block 5 can be driven by the electrically controlled slide rail 7 to move up and down.

[0030] Each second support block 13 has a second slider 15 fixedly connected to both ends. The second slider 15 is slidably embedded in a groove 17 opened in the inner wall of the detection table 1, so that the second support block 13 can rise and fall independently along the path defined by the groove 17. Furthermore, a third magnet 16 is fixed on the second slider 15, and an iron block is fixed on the top wall of the groove 17. Through the attraction between the third magnet 16 and the iron block, the second support block 13 can be temporarily fixed at the initial high position.

[0031] The clamping and sealing mechanism is used to clamp the pipe fittings 27 at both ends of the pipe joint 26 and form a sealed testing chamber. The clamping and sealing mechanism includes a fixed base 18 fixedly mounted on the top of one end of the testing table 1, and a sliding base 22 movably mounted on the other end. Both the fixed base 18 and the sliding base 22 have rubber layers on their opposing end faces to enhance the sealing performance of the pipe fittings 27. The sliding base 22 is driven by a cylinder 21 mounted on the testing table 1 and can move closer to or further away from the fixed base 18. The telescopic end of the cylinder 21 is fixedly connected to the sliding base 22.

[0032] An air inlet 24 is provided on the end face of the sliding seat 22, and an air inlet pipe 23 communicating with the air inlet 24 is installed on the sliding seat 22. The air inlet pipe 23 is connected to an external air pump. A pressure sensor 25 for detecting pressure is installed on the end face of the sliding seat 22.

[0033] The gas path control mechanism is used to control the emission path of the gas after testing. The gas path control mechanism includes two exhaust channels 19 located inside the testing station 1. One end of the exhaust channel 19, the inlet end, extends into the mounting base 18 and passes through the end face of the mounting base 18. The other end of the exhaust channel 19, the outlet end, points towards the selection component. Each exhaust channel 19 is equipped with an electrically controlled valve 20.

[0034] The selection component operates in response to the gas force discharged from the exhaust channel 19 to selectively establish a magnetic connection between the first support block 5 and one of the second support blocks 13.

[0035] Specifically, a mounting cavity is formed on the first support block 5, and a rotating shaft 8 is rotatably mounted in the mounting cavity via a bearing. One end of a connecting plate 9 is fixedly connected to the rotating shaft 8 and can rotate with the rotating shaft 8. A first magnet 10 is fixedly mounted on the other end of the connecting plate 9. Two stops 11 are also fixed on the inner wall of the mounting cavity. The connecting plate 9 is located between the two stops 11, and its rotation angle is limited between the two stops 11. A connecting pipe 12 is installed on each side of the first support block 5. One end of the connecting pipe 12 extends into the mounting cavity, and its opening is aligned with the surface of the connecting plate 9. The other end is sealed and connected to the outlet end of the corresponding exhaust channel 19. A second magnet 14 is fixed to the bottom of each of the two second support blocks 13, and the second magnet 14 attracts the first magnet 10.

[0036] The electric control slide rail 7, the air cylinder 21, the air pressure sensor 25, and the electric control valve 20 are all electrically connected to the controller. The air pressure sensor 25 is used to detect the air pressure in the detection cavity in real time and transmit the detected value to the controller, and the controller judges the detected value. If Figure 4 , Figure 6 , Figure 7 As shown, if the detected value remains stable, it is judged that the pipe joint 26 is qualified, and the controller controls the opening of the left electric control valve 20, so that the gas in the detection cavity passes through the left electric control valve 20 and the left exhaust passage 19 and enters the left connecting pipe 12. The gas ejected from the left connecting pipe 12 makes the exhaust passage 19 rotate, and then makes the first magnet 10 adsorb to the second magnet 14 at the bottom of the second support block 13 on the right. If the detected value continues to decline, the pipe joint 26 is judged to be unqualified, and the controller controls the opening of the right electric control valve 20, so that the first magnet 10 adsorbs to the second magnet 14 at the bottom of the second support block 13 on the left.

[0037] Working principle: In the initial state, the electric control slide rail 7 holds the first support block 5 at a high position, and the third magnet 16 adsorbs to the iron block on the top wall of the chute 17. The upper surfaces of the two second support blocks 13 form a V-shaped positioning surface. The two connecting pipes 12 are respectively in a butting state with the outlet ends of the two exhaust passages 19.

[0038] The outer diameters of the pipe joint 26 and the pipe fitting 27 should both be less than half of the inner cavity width of the test bench 1, so that the pipe joint 26 and the pipe fitting 27 can be discharged smoothly.

[0039] During detection, the operator installs the pipe fittings 27 at both ends of the pipe joint 26. The pipe joint 26 assembled with the pipe fittings 27 is integrally placed on the V-shaped positioning surface.

[0040] Start the air cylinder 21, and push the sliding seat 22 towards the fixed seat 18 until the ends of the two pipe fittings 27 are tightly clamped and sealed between the sliding seat 22 and the fixed seat 18. At this time, the sliding seat 22, the fixed seat 18, and the pipe joint 26 and the pipe fittings 27 enclose a closed detection cavity. At this time, the air inlet hole 24, the air pressure sensor 25, and the inlets of the two exhaust passages 19 are all located in this detection cavity.

[0041] Start the external air pump, and the gas enters the detection cavity through the air inlet pipe 23 and the air inlet hole 24. The air pressure sensor 25 monitors the pressure in the detection cavity in real time. When the pressure reaches the preset value, turn off the air pump and enter the pressure holding and monitoring stage. If the air pressure remains stable, it is determined that the pipe joint 26 has qualified sealing performance. If the air pressure continues to decline, it is determined to be unqualified.

[0042] After the detection is completed, automatic sorting is performed according to the determination result: If the sealing performance is qualified: Please refer to Figure 4 and Figure 6 The controller opens the electrically controlled valve 20 on the left side, which is the same side as the first through hole 2. The gas in the detection chamber is ejected at high speed through the left exhaust channel 19 and the connecting pipe 12. The airflow impacts the connecting plate 9. At this time, if the connecting plate 9 abuts against the right stop 11, the connecting plate 9 remains abutting against the right stop 11; if the connecting plate 9 abuts against the left stop 11, the airflow impacts the connecting plate 9 and rotates it to the right until the connecting plate 9 abuts against the right stop 11. The connecting plate 9 abuts against the right stop 11, so that the first magnet 10 is directly opposite the second magnet 14 at the bottom of the second support block 13 on the right side, which is the same side as the second through hole 3, and a magnetic attraction is generated.

[0043] Subsequently, cylinder 21 retracts, releasing its grip on pipe fitting 27. Next, the controller activates the electrically controlled slide rail 7, driving the first support block 5 to descend. The attraction between the first magnet 10 and the second magnet 14 is greater than the attraction between the third magnet 16 and the iron block. Since the first magnet 10 is already attracted to the second magnet 14 on the right side of the second support block 13, the descent of the first support block 5 will cause the right side of the second support block 13 to descend along with it due to the magnetic attraction between the first magnet 10 and the second magnet 14. During this process, the third magnet 16 on the right side of the second support block 13 will overcome the attraction between itself and the iron block at the top of the slide rail 17 and detach. Meanwhile, the left side of the second support block 13 remains stationary at its initial high position due to the attraction between the third magnet 16 and the iron block.

[0044] After the first support block 5 and the second support block 13 on the right descend, they together form a guide slope facing the first through hole 2. The pipe joint 26 and pipe fitting 27 move downward under the action of gravity and are discharged from the first through hole 2, and are picked up by the corresponding conveying device 4.

[0045] If the seal is not up to standard: Please refer to Figure 4 and Figure 7 The controller opens on the same side as the second through hole 3 (i.e. Figure 4 The electrically controlled valve 20 (on the right side) is located in the detection chamber. Gas in the detection chamber is ejected at high speed through the right exhaust channel 19 and connecting pipe 12. The airflow impacts the connecting plate 9, causing the connecting plate 9 to abut against the left-side stop block 11. With the connecting plate 9 abutting against the left-side stop block 11, the first magnet 10 is directly opposite the second magnet 14 at the bottom of the second support block 13 on the left side, which is the same side as the first through hole 2, and they generate a magnetic attraction force.

[0046] Subsequently, cylinder 21 retracts, releasing its grip on pipe fitting 27. Next, the controller activates the electrically controlled slide rail 7, driving the first support block 5 to descend. Since the first magnet 10 is already attracted to the second magnet 14 on the left second support block 13, the descent of the first support block 5, through the magnetic attraction between the first magnet 10 and the second magnet 14, will cause the left second support block 13 to descend as well. During this process, the third magnet 16 on the left second support block 13 will overcome the attraction force with the iron block at the top of the slide rail 17 and detach. Meanwhile, the right second support block 13 remains stationary at its initial high position due to the attraction between the third magnet 16 and the iron block.

[0047] After the first support block 5 and the second support block 13 on the left descend, they together form a guide slope facing the second through hole 3. The pipe joint 26 and pipe fitting 27 move downward under the action of gravity and are discharged from the second through hole 3, and are picked up by the corresponding conveying device 4.

[0048] Based on the test results, different electrically controlled valves 20 are opened, allowing the gas in the test chamber to be discharged through the corresponding exhaust channels 19. During discharge, the connecting plate 9 is driven, connecting the first support block 5 with the corresponding second support block 13. When the first support block 5 moves down, it drives the corresponding second support block 13 to move down simultaneously, while the other second support block 13 remains at its initial high position. The pipe joint 26 and pipe fitting 27 are discharged downward along the guide slope under the action of gravity and fall onto the corresponding conveying device 4, thereby realizing the automatic sorting of qualified and unqualified products.

[0049] After sorting is completed, the electronically controlled slide rail 7 drives the first support block 5 to rise and reset. The corresponding second support block 13 also rises until the third magnet 16 at the top of the second slider 15 re-attracts to the iron block at the top of the slide chute 17, returning to the initial state.

[0050] The method for testing the sealing performance of pipe joints includes the following steps: S1. Install pipe fittings 27 at both ends of the pipe joint 26 and place the assembled pipe joint 26 and pipe fittings 27 on the positioning surface.

[0051] S2. Start the clamping and sealing mechanism. The clamping and sealing mechanism clamps the pipe fitting 27 and seals the end of the pipe fitting 27. The pipe joint 26, the pipe fitting 27 and the clamping and sealing mechanism form a closed detection chamber.

[0052] S3. Inflate the detection chamber with air; monitor the air pressure in the detection chamber using the air pressure sensor 25 to determine whether the pipe joint 26 is qualified.

[0053] S4. If the pipe joint 26 is qualified: the electrically controlled valve 20 on the same side as the first through hole 2 is opened, the gas in the detection chamber enters the exhaust channel 19 on the same side as the first through hole 2, and the gas drives the selection component to act, so that the first support block 5 is connected to the second support block 13 on the same side as the second through hole 3; control the first support block 5 to descend, and the pipe joint 26 is discharged from the first through hole 2. If the pipe joint 26 is unqualified: the electrically controlled valve 20 on the same side as the second through hole 3 opens, the gas in the detection chamber enters the exhaust channel 19 on the same side as the second through hole 3, and the gas drives the selection component to connect the first support block 5 with the second support block 13 on the same side as the first through hole 2; control the first support block 5 to descend, and the pipe joint 26 is discharged from the second through hole 3.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection device for facilitating detection of the tightness of a pipe joint, characterized in that The utility model relates to a pipeline joint sealing property testing device, which comprises the following parts: a detection table, the bottom of which is provided with a first through hole (2) and a second through hole (3); a clamping and sealing mechanism arranged on the detection table, which is used for clamping pipe fittings (27) at two ends of a pipeline joint (26) to be tested and forming a closed detection cavity, and is provided with an air inlet hole (24) and an air pressure sensor (25); an air path control mechanism, which comprises two exhaust channels (19) respectively connected with the detection cavity, and each exhaust channel (19) is provided with an electric control valve (20); a supporting assembly, which comprises a first supporting block (5) and two second supporting blocks (13) arranged on both sides of the upper end of the first supporting block (5), and the two second supporting blocks (13) jointly form a positioning surface for receiving the pipeline joint (26); the first supporting block (5) and the second supporting blocks (13) are movably arranged in the detection table (1); a selection assembly arranged on the first supporting block (5), which is used for selectively connecting the first supporting block (5) with one of the second supporting blocks (13) in response to the gas sprayed from the exhaust channels (19); wherein, when the pipeline joint (26) passes the sealing property test, the first supporting block (5) is connected with the second supporting block (13) close to the side of the second through hole (3) and is lowered to form a guide slope, so that the pipeline joint is discharged from the first through hole (2); when the sealing property is unqualified, the first supporting block (5) is connected with the second supporting block (13) close to the side of the first through hole (2) and is lowered to form a guide slope, so that the pipeline joint (26) is discharged from the second through hole (3).

2. The detection apparatus for facilitating detection of the tightness of a pipe joint according to claim 1, characterized by: The selection assembly comprises a connecting plate (9), the first supporting block (5) is provided with a mounting cavity, a rotating shaft (8) is rotatably arranged in the mounting cavity, one end of the connecting plate (9) is fixedly connected with the rotating shaft (8), the other end of the connecting plate (9) is fixedly connected with a first magnet (10), one side of the second supporting block (13) matched with the first supporting block (5) is provided with a second magnet (14), and the second magnet (14) is magnetically attracted to the first magnet (10).

3. The detection apparatus for facilitating detection of the tightness of a pipe joint according to claim 2, characterized by: Two stop blocks (11) are fixedly connected to the inner wall of the mounting cavity, and the connecting plate (9) is located between the two stop blocks (11).

4. The detection apparatus for facilitating detection of the tightness of a pipe joint according to claim 3, characterized by: The first supporting block (5) is provided with a connecting pipe (12) on each side, one end of the connecting pipe (12) extends into the mounting cavity, and the other end is matched with the outlet end of the exhaust channel (19); and the gas in the exhaust channel (19) is sprayed through the connecting pipe (12).

5. The detection apparatus of claim 1, wherein: The clamping and sealing mechanism comprises: a fixed seat (18) fixed to one end of the detection table (1); the exhaust channel (19) extends to the fixed seat (18) and penetrates the end face of the fixed seat (18); a sliding seat (22) movably arranged at the other end of the detection table (1), wherein the air inlet hole (24) and the air pressure sensor (25) are arranged on the end face of the sliding seat (22), and the sliding seat (22) is provided with an air inlet pipe (23) communicated with the air inlet hole (24); an air cylinder (21) mounted on the detection table (1), wherein the telescopic end of the air cylinder (21) is fixedly connected with the sliding seat (22), and the air cylinder (21) drives the sliding seat (22) to move close to or away from the fixed seat (18).

6. The detection apparatus of claim 5, wherein: Both the fixed seat (18) and the sliding seat (22) are provided with a rubber layer on their end faces.

7. The detection apparatus of claim 1, wherein: The first support block (5) is fixedly connected to the first slider (6), and the detection table (1) is equipped with an electrically controlled slide rail (7) that drives the first slider (6) to rise and fall.

8. The detection apparatus of claim 1, wherein: The second support block (13) is fixedly connected to the second slider (15). One end of the second slider (15) is slidably disposed in the groove (17) opened on the inner wall of the detection table (1). The second slider (15) is fixedly connected to the third magnet (16). The top wall of the groove (17) is fixedly connected to the iron block that is attracted and cooperates with the third magnet (16).

9. The detection apparatus of claim 1, wherein: Both sides of the testing platform (1) are provided with conveying devices (4), one of which is configured to cooperate with the first through hole (2), and the other is configured to cooperate with the second through hole (3).

10. A method for detecting the tightness of a pipe joint using the detection device for detecting the tightness of a pipe joint according to claim 1, characterized by, Includes the following steps: S1. Install pipe fittings (27) at both ends of the pipe joint (26) and place the assembled pipe joint (26) and pipe fittings (27) on the positioning surface; S2. Start the clamping and sealing mechanism. The clamping and sealing mechanism clamps the pipe fitting (27) and seals the end of the pipe fitting (27). The pipe joint (26), the pipe fitting (27) and the clamping and sealing mechanism form a closed detection chamber. S3. Inflate the detection chamber with air; monitor the air pressure in the detection chamber using the air pressure sensor (25) to determine whether the pipe joint (26) is qualified; S4, Pipe joint (26) qualified: The electrically controlled valve (20) on the same side as the first through hole (2) is opened, and the gas in the detection chamber enters the exhaust channel (19) on the same side as the first through hole (2). The gas drives the selection component to connect the first support block (5) with the second support block (13) on the same side as the second through hole (3); the first support block (5) is controlled to descend, and the pipe joint (26) is discharged from the first through hole (2); Pipe joint (26) is unqualified: The electric control valve (20) on the same side as the second through hole (3) is opened, and the gas in the detection chamber enters the exhaust channel (19) on the same side as the second through hole (3). The gas drives the selection component to connect the first support block (5) with the second support block (13) on the same side as the first through hole (2). The first support block (5) is controlled to descend, and the pipe joint (26) is discharged from the second through hole (3).

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