Equipment and method for detecting air tightness of transition joint for engineering machinery

Abstract

The invention relates to the technical field of air tightness detection, and discloses an air tightness detection device of a transition joint for engineering machinery, which comprises a detection table, the detection table is provided with a material loading seat, one side of the material loading seat is provided with a sleeve, and the other side of the material loading seat is provided with a plug. Electric push rods used for pushing the sleeve and the plug to move horizontally are arranged on the two sides of the detection table respectively. According to the invention, the sleeve with the dismounting mechanism is arranged, the difference of air pressure during detection is utilized, if a workpiece leaks air, the first piston cannot push the adjusting ring to a designated position, the adjusting ring cannot reach the limiting mechanism and is clamped with the limiting mechanism at the moment, air supply is stopped after detection is finished, and the movable teeth return to the original position along with flowing-out of the air; in this way, when the sleeve drives the movable teeth to return to the original position, the sides, with the rough planes, of the movable teeth make contact with the sealing ring, the sealing ring can be pulled down from the workpiece under driving of the movable teeth, and therefore recycling of the sealing ring can be completed.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to an air tightness detection device and method for a transition joint for engineering machinery. Background Art

[0002] Transition joints are widely used, often connecting pipes, cables, or other equipment of different materials, specifications, or types. Depending on the material, they can be categorized into two main types: metal and plastic. Plastic joints primarily consist of a connecting portion and a detachable separating portion. The separating portion typically includes an internally threaded retaining ring and a snap ring with a flexible opening. To use, the internally threaded retaining ring and snap ring are removed and fitted over the pipe to be connected. One end of the connecting portion is then inserted into the pipe to be connected. The internally threaded retaining ring is then threaded onto the connecting portion. The internally threaded retaining ring is slightly larger than the snap ring and features a tapered opening at the end. As the internally threaded retaining ring is twisted, it moves toward the midpoint of the connecting portion, driven by the threads. During this process, one end of the snap ring contacts the connecting portion, while the other end is squeezed by the internally threaded retaining ring. This pushes the snap ring, tightening the flexible opening on the snap ring, effectively sealing the pipe. To improve sealing, effective products also incorporate sealing rings and gaskets at the connection.

[0003] Existing transition joints generally undergo two sealing tests during inspection. The first test is to plug both ends of the joint with plugs, then inflate the joint and maintain pressure for a period of time to test the airtightness of the joint. The second test is to install the sealing ring, cover the two ends of the joint with two sleeves, and then inflate and maintain pressure again to test the airtightness of the sleeve and the sealing ring. In the existing technology, when unqualified products are found, they are generally recycled or directly scrapped. However, the sealing ring on the joint can still be reused. Under normal circumstances, the sealing ring on the joint can only be manually removed by personnel, which is relatively inconvenient. Summary of the Invention

[0004] The present invention provides an air tightness detection device and method for a transition joint for engineering machinery, which has the beneficial effect of being able to conveniently complete the removal of the sealing rings of unqualified products, and solves the problem mentioned in the above background technology that when unqualified products are found, the products are generally recycled or directly scrapped, but the sealing rings on the joints can still be reused. Under normal circumstances, manual labor can only be arranged to remove the sealing rings on the joints, which is relatively inconvenient.

[0005] The present invention provides the following technical solution: an air tightness testing device for a transition joint for engineering machinery, comprising a testing platform, a material carrier provided on the testing platform, a sleeve provided on one side of the material carrier, and a plug provided on the other side of the material carrier, and electric push rods for pushing the sleeve and the plug for translation are respectively provided on both sides of the testing platform;

[0006] The sleeve is provided with a disassembly mechanism, which includes a plurality of extension seats, one end of which is provided with movable teeth, the movable teeth being elastically connected to the extension seats via a first spring, and the movable teeth being provided with a track groove, and the sleeve is provided with an adjustment ring, the adjustment ring being elastically connected to the sleeve via a second spring, and the adjustment ring being provided with first push rods whose number and position correspond one-to-one to the movable teeth;

[0007] A cylinder is provided on the outside of the sleeve, one end of the cylinder is connected to the inside of the sleeve, and a first piston is provided in the cylinder. The first piston is elastically connected to the cylinder through a third spring, and the adjusting ring is fixedly connected to the first piston through a first piston rod. A limiting mechanism for limiting the adjusting ring is provided on the sleeve, and a unloading mechanism is provided on the loading seat.

[0008] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the limiting mechanism includes a bracket, one end of the bracket is fixedly connected to the sleeve, and a limiting block is provided on the bracket, and the limiting block is fixedly connected to the bracket through a first rebound spring, an extension column is provided on one side of the adjustment ring whose position corresponds to the limiting block, and a first baffle is provided on one side of the loading seat.

[0009] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the limiting mechanism includes a clamping plate, which is elastically connected to the adjustment ring through a torsion spring, and a triangular block is provided at one end of the clamping plate, a clamping tooth is provided on the extension seat, and a second baffle is provided on one side of the loading seat.

[0010] As an optional solution of the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the extension seat is arranged in a ring shape and equidistantly on the outside of the sleeve, and an opening is opened on the extension seat for the movable teeth to enter and exit.

[0011] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the unloading mechanism includes a limit seat arranged inside the loading seat, the limit seat is elastically connected to the loading seat through a limit spring, and two limit blocks are provided on the limit seat, and one side of the limit block is provided with a slope.

[0012] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, wherein: a first fixing ear is symmetrically provided on the loading seat, the first fixing ear is elastically connected to the loading seat through a fourth spring, and an extension rod is provided at the bottom of the first fixing ear, one end of the extension rod is in contact with the end of the limit block with the inclined surface.

[0013] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the loading seat is provided with a discharge port for the material to fall, and the loading seat is provided with a first adjusting rod at one end close to the sleeve, the first adjusting rod is slidably connected to the loading seat, and one end of the first adjusting rod is fixedly connected to the limit seat.

[0014] As an optional solution of the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the unloading mechanism includes a seesaw arranged inside the loading seat, the seesaw is rotatably connected to the loading seat through a rotating shaft, and one end of the seesaw is provided with a rib, one end of the seesaw is in contact with a second push rod, and the other end of the seesaw is in contact with a second adjusting rod, the second push rod is slidably connected to the loading seat, and the top of the second push rod is provided with an inclined plate, and the second adjusting rod is elastically connected to the loading seat through a fifth spring.

[0015] As an optional solution for the air tightness detection equipment of the transition joint for engineering machinery described in the present invention, the material carrier is provided with a second fixing ear and a third fixing ear, the second fixing ear and the third fixing ear are both provided with a card slot, and a guide plate is provided on one side of the second fixing ear.

[0016] The present invention discloses a method for detecting air tightness of a transition joint for engineering machinery, comprising the following steps:

[0017] S1. Preparation before testing: clean both ends of the workpiece to ensure that the outer testing surface of the workpiece is free of contaminants and the sealing ring is installed correctly;

[0018] S2. Place the workpiece on the carrier, and then seal both ends of the workpiece with a sleeve and a plug respectively. Then, a certain amount of gas is introduced into the workpiece, and the pressure is maintained for a period of time while the air pressure inside the workpiece is tested. If the air pressure reaches the predetermined value, it means that one end of the workpiece is qualified.

[0019] S3. Change the position of the workpiece so that the end originally aligned with the plug is aligned with the sleeve, and then seal the workpiece again. Then, a certain amount of gas is introduced into the workpiece, and then the pressure is maintained for a period of time and the air pressure inside the workpiece is tested. If the air pressure reaches the predetermined value, it means that the other end of the workpiece is also qualified.

[0020] The present invention has the following beneficial effects:

[0021] 1. This air tightness testing device and method for a transition joint for engineering machinery is provided with a sleeve with a disassembly mechanism. During testing, a certain amount of gas needs to be introduced into the workpiece to detect whether the workpiece is leaking. The disassembly mechanism includes a cylinder with a first piston. During testing, some gas will enter the cylinder. Under the influence of air pressure, the first piston will produce different displacements. If there is no leakage and the air pressure is normal, the first piston can be urged to reach a specified position. At this time, the limiting mechanism can clamp the adjustment ring with the first push rod, and the first push rod can be used to promote the movement of the movable tooth. When the sleeve returns to its original position, the movable tooth does not contact the sealing ring on the workpiece.

[0022] If the workpiece leaks, the air pressure will not meet the requirement, and the first piston will not be able to push the adjusting ring to the specified position. At this time, the adjusting ring cannot reach the limit mechanism and engage with the limit mechanism. When the detection is completed, the air supply is stopped, and as the gas flows out, the movable tooth returns to its original position. In this way, when the sleeve returns to its original position with the movable tooth, the side of the movable tooth with the rough surface contacts the sealing ring. Driven by the movable tooth, the sealing ring can be stripped off the workpiece, so that the sealing ring can be recovered, which is efficient and saves time and effort.

[0023] 2. This air tightness detection equipment and method for transition joints for engineering machinery is equipped with a disassembly mechanism with movable teeth. The movable teeth will be in different positions according to different detection results. When the detection structure is qualified, the movable teeth will be linked with the unloading mechanism to prompt the workpiece to be unloaded through the unloading port. When the detection result is unqualified, the movable teeth will not be linked with the unloading mechanism, which simply completes the distinction between qualified and unqualified workpieces, making the subsequent processing of the workpiece more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 This is a schematic diagram of the first structure of the disassembly mechanism according to the first embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the extension seat of the present invention.

[0027] Figure 4 This is a schematic diagram of the second structure of the disassembly mechanism according to the first embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the limiting mechanism structure of embodiment 2 of the present invention.

[0029] Figure 6 This is a first structural diagram of the unloading mechanism in embodiment 4 of the present invention.

[0030] Figure 7 Schematic diagram of the internal structure of the material carrier of the present invention.

[0031] Figure 8 This is a second structural diagram of the unloading mechanism in embodiment 4 of the present invention.

[0032] Figure: 1, test table; 2, loading base; 201, discharge port; 3, sleeve; 4, plug; 5, electric push rod; 6, extension base; 601, latching tooth; 7, movable tooth; 701, track groove; 8, first spring; 9, adjustment ring; 10, second spring; 11, first push rod; 12, cylinder; 13, first piston; 14, third spring; 15, first piston rod; 16, bracket; 17, limit rod; 18, first rebound spring; 19, first baffle ; 20. Card plate; 21. Triangular block; 22. Second baffle; 23. Limit seat; 24. Limit spring; 25. Limit block; 26. First fixing ear; 27. Fourth spring; 28. Extension rod; 29. ​​First adjusting rod; 30. Rocker; 31. Raised rib; 32. Second push rod; 33. Second adjusting rod; 34. Inclined plate; 35. Fifth spring; 36. Second fixing ear; 37. Third fixing ear; 38. Slot; 39. Guide plate; 40. Extension column. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] For example 1, please refer to Figures 1 to 8 An air tightness testing device for a transition joint for engineering machinery includes a testing platform 1, a material carrier 2 is provided on the testing platform 1, a sleeve 3 is provided on one side of the material carrier 2, and a plug 4 is provided on the other side of the material carrier 2. Electric push rods 5 for pushing the sleeve 3 and the plug 4 to move horizontally are provided on both sides of the testing platform 1;

[0035] The sleeve 3 is provided with a disassembly mechanism, which includes a plurality of extension seats 6, one end of which is provided with a movable tooth 7, which is elastically connected to the extension seat 6 via a first spring 8, and a track groove 701 is provided on the movable tooth 7. The sleeve 3 is provided with an adjustment ring 9, which is elastically connected to the sleeve 3 via a second spring 10, and the adjustment ring 9 is provided with a first push rod 11 whose number and position correspond one-to-one with the movable teeth 7;

[0036] A cylinder 12 is provided on the outside of the sleeve 3, one end of the cylinder 12 is connected to the inside of the sleeve 3, and a first piston 13 is provided in the cylinder 12. The first piston 13 is elastically connected to the cylinder 12 through a third spring 14, and the adjusting ring 9 is fixedly connected to the first piston 13 through a first piston rod 15. A limiting mechanism for limiting the adjusting ring 9 is provided on the sleeve 3, and a unloading mechanism is provided on the loading seat 2.

[0037] The limiting mechanism includes a bracket 16, one end of the bracket 16 is fixedly connected to the sleeve 3, and a limiting rod 17 is provided on the bracket 16, and the limiting rod 17 is fixedly connected to the bracket 16 through a first rebound spring 18. An extension column 40 is provided on one side of the adjusting ring 9, and a first baffle 19 is provided on one side of the loading seat 2.

[0038] The extension seat 6 is annularly arranged at equal intervals on the outside of the sleeve 3, and an opening is formed on the extension seat 6 for the movable teeth 7 to enter and exit.

[0039] When in use, the workpiece is placed on the loading seat 2, and two first fixing ears 26 are provided on the loading seat 2. An L-shaped notch that fits the workpiece is provided on the first fixing ear 26. An electric push rod 5 is provided on each side of the loading seat 2, one of which is used to push the plug 4 to move, and the other is used to push the sleeve 3 to move. When the workpiece is placed, the electric push rod 5 is started, the plug 4 is inserted into one end of the workpiece to seal the workpiece, and the sleeve 3 moves closer to the workpiece and is sleeved on the other end of the workpiece. The sleeve 3 cooperates with the rubber sealing ring at the end of the workpiece to seal the workpiece. An air inlet is provided on the sleeve 3, and the sleeve 3 passes through the pipe An external air supply mechanism is connected, and a certain amount of gas is sent into the workpiece through the sleeve 3 through the air supply mechanism. As the gas enters, the air pressure inside the workpiece increases. A pressure sensor is also provided in the sleeve 3, and the air pressure can be detected by the pressure sensor. As the air pressure increases, the first piston 13 overcomes the resistance of the third spring 14 and moves. Driven by the first piston 13 and the first piston rod 15, the adjusting ring 9 moves. Driven by the adjusting ring 9, the first push rod 11 is inserted into the track groove 701 of the movable tooth 7, and conflicts with the inclined surface of the track groove 701. Pushed by the first push rod 11, the movable tooth 7 overcomes the resistance of the first spring 8 and moves.

[0040] The present technical solution is provided with a sleeve 3 with a disassembly mechanism. Under normal circumstances, the movable tooth 7 is located at one end of the extension seat 6 close to the sleeve 3, and an inclined surface is provided on the outer side of the movable tooth 7. When the sleeve 3 approaches the workpiece, the inclined surface of the movable tooth 7 conflicts with the sealing ring on the workpiece. Affected by the inclined surface, the movable tooth 7 will pass over the sealing ring. If the contact surface between the sleeve 3 and the workpiece is normal, there will be no air leakage between the two under a certain pressure. In this way, the first piston 13 will generate sufficient displacement under the push of air pressure to prompt the adjusting ring 9 to move so that it can engage with the limiting mechanism. When the adjusting ring 9 reaches a certain position, the first push rod 11 will conflict with the movable tooth 7. Under the influence of the track groove 701, the movable tooth 7 moves and moves in the direction away from the sleeve 3. At this time, when the sleeve 3 returns to its original position, the movable tooth 7 no longer contacts the sealing ring.

[0041] When the contact surface between the sleeve 3 and the workpiece is abnormal, that is, when the workpiece is unqualified, the contact between the sleeve 3 and the workpiece leaks, so the air pressure does not meet the requirement, and the first piston 13 cannot push the adjusting ring 9 to the specified position. At this time, the adjusting ring 9 cannot reach the limiting mechanism and engage with the limiting mechanism. When the detection is completed, the air supply is stopped, and as the gas flows out, the movable tooth 7 returns to its original position. In this way, when the sleeve 3 returns to its original position with the movable tooth 7, the side of the movable tooth 7 with the rough surface contacts the sealing ring, and the sealing ring can be stripped off the workpiece under the drive of the movable tooth 7, so that the sealing ring can be recovered, which is efficient and saves time and effort.

[0042] When the sleeve 3 moves toward the workpiece, the extension column 40 on the adjusting ring 9 conflicts with the inclined surface on the limit rod 17 and pushes the limit rod 17 to move. At this time, the extension column 40 can pass over the limit rod 17, and then the limit rod 17 returns to its original position, clamping the extension column 40. When the sleeve 3 returns to its original position, the end of the limit rod 17 with the inclined surface conflicts with the first baffle 19, and the first baffle 19 pushes the lower limit rod 17 to move. A notch is provided on the limit rod 17. When the notch is opposite to the extension column 40, the extension column 40 can pass over the limit rod 17 through the notch. At this time, the adjusting ring 9 and the extension column 40 return to their original positions under the action of the second spring 10.

[0043] Example 2: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 8 The limiting mechanism includes a card plate 20, which is elastically connected to the adjusting ring 9 through a torsion spring, and a triangular block 21 is provided at one end of the card plate 20, a card tooth 601 is provided on the extension seat 6, and a second baffle 22 is provided on one side of the loading seat 2.

[0044] This embodiment discloses another technical solution of the limiting mechanism, which includes a card plate 20, which is elastically connected to the adjusting ring 9. Correspondingly, a latch tooth 601 is provided on one of the extension seats 6. When the adjusting ring 9 moves to a certain position, the card plate 20 engages with the latch tooth 601. At this time, the adjusting ring 9 cannot return to its original position. As the sleeve 3 returns to its original position, when it reaches the position of the second baffle 22, the second baffle 22 conflicts with the triangular block 21 on the card plate 20. Under the push of the second baffle 22, one end of the card plate 20 is tilted up. At this time, the latch tooth 601 is separated from the card plate 20, and the adjusting ring 9 returns to its original position under the push of the second spring 10.

[0045] Example 3: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 8 The unloading mechanism includes a limit seat 23 arranged inside the loading seat 2, the limit seat 23 is elastically connected to the loading seat 2 through a limit spring 24, and two limit blocks 25 are provided on the limit seat 23, and one side of the limit block 25 is provided with an inclined surface.

[0046] A first fixing ear 26 is symmetrically provided on the loading base 2, and the first fixing ear 26 is elastically connected to the loading base 2 through a fourth spring 27, and an extension rod 28 is provided at the bottom of the first fixing ear 26, one end of the extension rod 28 contacts the end of the limit block 25 with an inclined surface.

[0047] The loading seat 2 is provided with a discharge port 201 for materials to fall, and a first adjusting rod 29 is provided at one end of the loading seat 2 close to the sleeve 3. The first adjusting rod 29 is slidably connected to the loading seat 2, and one end of the first adjusting rod 29 is fixedly connected to the limit seat 23.

[0048] For the convenience of unloading, the present technical solution also provides an unloading mechanism, which includes a limit seat 23 located inside the loading seat 2, and correspondingly, an extension rod 28 is provided at the lower end of the first fixed ear 26. Under normal circumstances, the extension rod 28 conflicts with the inclined surface of the limit block 25. When the sleeve 3 returns to its original position, if the detection is normal, the movable tooth 7 protrudes. At this time, the movable tooth 7 will conflict with the first adjusting rod 29. Driven by the movable tooth 7, the first adjusting rod 29 drives the limit seat 23 to move. With the movement of the limit seat 23, the extension rod 28 slides along the inclined surface of the limit block 25. At this time, the two first fixed ears 26 are in an open state. With the movement of the first fixed ear 26, the material between the first fixed ears 26 falls into the discharge port 201. When the movable tooth 7 returns to its original position, the movable tooth 7 is separated from the first adjusting rod 29, and the limit seat 23 returns to its original position under the action of the limit spring 24.

[0049] If the test fails, when the sleeve 3 returns to its original position, the movable tooth 7 will not conflict with the first adjusting rod 29. At this time, the workpiece will stay between the two first fixed ears 26, and the unqualified workpiece can be taken away by the robot. The present application sets up a disassembly mechanism with movable teeth 7. The movable teeth 7 will be in different positions according to the different test results. When the test structure is qualified, the movable teeth 7 are linked with the unloading mechanism to prompt the workpiece to be unloaded through the unloading port 201. When the test result is unqualified, the movable teeth 7 are not linked with the unloading mechanism, which simply completes the distinction between qualified and unqualified workpieces, making the subsequent processing of the workpiece more convenient.

[0050] Example 4: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 8 The unloading mechanism includes a seesaw 30 arranged inside the loading seat 2, the seesaw 30 is rotatably connected to the loading seat 2 through a rotating shaft, and one end of the seesaw 30 is provided with a rib 31, one end of the seesaw 30 abuts against a second push rod 32, and the other end of the seesaw 30 abuts against a second adjusting rod 33, the second push rod 32 is slidably connected to the loading seat 2, and the top of the second push rod 32 is provided with an inclined plate 34, and the second adjusting rod 33 is elastically connected to the loading seat 2 through a fifth spring 35.

[0051] The loading base 2 is provided with a second fixing ear 36 and a third fixing ear 37 . Both the second fixing ear 36 and the third fixing ear 37 are provided with a slot 38 , and a guide plate 39 is provided on one side of the second fixing ear 36 .

[0052] This embodiment discloses another technical solution of a unloading mechanism. A slot 38 that fits the workpiece is provided on the second fixing ear 36 and the third fixing ear 37. When the product is qualified, the adjusting ring 9 is restricted by the limiting mechanism, and the movable tooth 7 extends outward to a large extent. When the sleeve 3 returns to its original position under the pull of the electric push rod 5, a movable tooth 7 located at the lowermost side of the sleeve 3 will conflict with the second adjusting rod 33. Driven by the sleeve 3, the movable tooth 7 drags the second adjusting rod 33 to move, and the second adjusting rod 33 and the rib 31 on the rocker 30 are engaged. The second adjusting rod 33 pushes one end of the rocker 30 to tilt up, and the second push rod 32 and the inclined plate 34 move upward under the push of the rocker 30. The inclined plate 34 conflicts with the workpiece placed between the second fixed ear 36 and the third fixed ear 37. The workpiece rises under the push of the inclined plate 34. A guide plate 39 is provided on one side of the second fixed ear 36. The height of the third fixed ear 37 is higher than that of the second fixed ear 36. When the workpiece moves to a certain position, the workpiece rolls off the inclined plate 34, and then moves along the guide plate 39 to reach the designated storage area.

[0053] The present invention discloses a method for detecting air tightness of a transition joint for engineering machinery, comprising the following steps:

[0054] S1. Preparation before testing: clean both ends of the workpiece to ensure that the outer testing surface of the workpiece is free of contaminants and the sealing ring is installed correctly;

[0055] S2. Place the workpiece on the carrier 2, and then seal the two ends of the workpiece with the sleeve 3 and the plug 4 respectively. Then, a certain amount of gas is introduced into the workpiece, and then the pressure is maintained for a period of time and the air pressure inside the workpiece is tested. If the air pressure reaches the predetermined value, it means that one end of the workpiece is qualified.

[0056] S3. Change the position of the workpiece so that the end originally aligned with the plug 3 is aligned with the sleeve 4, and then seal the workpiece again. Then, a certain amount of gas is introduced into the workpiece, and then the pressure is maintained for a period of time and the air pressure inside the workpiece is tested. If the air pressure reaches the predetermined value, it means that the other end of the workpiece is also qualified.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An air tightness testing device for a transition joint for engineering machinery, comprising a testing platform (1), wherein a material loading seat (2) is provided on the testing platform (1), and characterized in that: A sleeve (3) is provided on one side of the material carrier (2), and a plug (4) is provided on the other side of the material carrier (2); and electric push rods (5) for pushing the sleeve (3) and the plug (4) to move in parallel are provided on both sides of the detection platform (1); The sleeve (3) is provided with a disassembly mechanism, which includes a plurality of extension seats (6), one end of the extension seat (6) is provided with a movable tooth (7), the movable tooth (7) is elastically connected to the extension seat (6) through a first spring (8), and the movable tooth (7) is provided with a track groove (701), the sleeve (3) is provided with an adjustment ring (9), the adjustment ring (9) is elastically connected to the sleeve (3) through a second spring (10), and the adjustment ring (9) is provided with a first push rod (11) whose number and position correspond to the movable teeth (7); A cylinder (12) is provided on the outside of the sleeve (3), one end of the cylinder (12) is connected to the inside of the sleeve (3), and a first piston (13) is provided in the cylinder (12), the first piston (13) is elastically connected to the cylinder (12) through a third spring (14), the adjusting ring (9) is fixedly connected to the first piston (13) through a first piston rod (15), a limiting mechanism for limiting the adjusting ring (9) is provided on the sleeve (3), and a discharging mechanism is provided on the loading seat (2).

2. The air tightness detection device and method for a transition joint for engineering machinery according to claim 1, characterized in that: The limiting mechanism includes a bracket (16), one end of the bracket (16) is fixedly connected to the sleeve (3), and a limiting rod (17) is provided on the bracket (16), and the limiting rod (17) is fixedly connected to the bracket (16) through a first rebound spring (18), an extension column (40) corresponding to the position of the limiting rod (17) is provided on one side of the adjusting ring (9), and a first baffle (19) is provided on one side of the loading seat (2).

3. The air tightness detection device and method for a transition joint for engineering machinery according to claim 1, characterized in that: The limiting mechanism includes a clamping plate (20), the clamping plate (20) is elastically connected to the adjusting ring (9) through a torsion spring, and a triangular block (21) is provided at one end of the clamping plate (20), a clamping tooth (601) is provided on the extension seat (6), and a second baffle (22) is provided on one side of the loading seat (2).

4. The air tightness detection device and method for a transition joint for engineering machinery according to claim 1, characterized in that: The extension seat (6) is arranged in an annular shape at equal intervals on the outside of the sleeve (3), and an opening for the movable teeth (7) to enter and exit is provided on the extension seat (6).

5. The air tightness detection device and method for a transition joint for engineering machinery according to claim 2, characterized in that: The unloading mechanism comprises a limiting seat (23) arranged inside the loading seat (2), the limiting seat (23) being elastically connected to the loading seat (2) via a limiting spring (24), and two limiting blocks (25) being provided on the limiting seat (23), and a slope being provided on one side of the limiting block (25).

6. The air tightness detection device and method for a transition joint for engineering machinery according to claim 5, characterized in that: A first fixing ear (26) is symmetrically provided on the material loading seat (2), and the first fixing ear (26) is elastically connected to the material loading seat (2) through a fourth spring (27). An extension rod (28) is provided at the bottom of the first fixing ear (26), and one end of the extension rod (28) contacts the end of the limit block (25) with an inclined surface.

7. The air tightness detection device and method for a transition joint for engineering machinery according to claim 6, characterized in that: The loading seat (2) is provided with a discharge port (201) for the material to fall, and a first adjusting rod (29) is provided at one end of the loading seat (2) close to the sleeve (3), the first adjusting rod (29) is slidably connected to the loading seat (2), and one end of the first adjusting rod (29) is fixedly connected to the limit seat (23).

8. The air tightness detection device and method for a transition joint for engineering machinery according to claim 2, characterized in that: The unloading mechanism includes a seesaw (30) arranged inside the loading seat (2), the seesaw (30) is rotatably connected to the loading seat (2) through a rotating shaft, and one end of the seesaw (30) is provided with a convex rib (31), one end of the seesaw (30) is in contact with a second push rod (32), and the other end of the seesaw (30) is in contact with a second adjusting rod (33), the second push rod (32) is slidably connected to the loading seat (2), and the top of the second push rod (32) is provided with an inclined plate (34), and the second adjusting rod (33) is elastically connected to the loading seat (2) through a fifth spring (35).

9. The air tightness detection device and method for a transition joint for engineering machinery according to claim 8, characterized in that: The material loading seat (2) is provided with a second fixing ear (36) and a third fixing ear (37), the second fixing ear (36) and the third fixing ear (37) are both provided with a slot (38), and a guide plate (39) is provided on one side of the second fixing ear (36).

10. The method for detecting air tightness of a transition joint for engineering machinery according to any one of claims 1 to 9, characterized in that: The steps include: S1. Preparation before testing: clean both ends of the workpiece to ensure that the outer testing surface of the workpiece is free of contaminants and the sealing ring is installed correctly; S2. Place the workpiece on the carrier (2), and then seal the two ends of the workpiece with the sleeve (3) and the plug (4), then introduce a certain amount of gas into the workpiece, and then maintain the pressure for a period of time and test the air pressure inside the workpiece. If the air pressure reaches a predetermined value, it means that one end of the workpiece is qualified. S3. Change the position of the workpiece so that the end originally aligned with the plug (3) is aligned with the sleeve (4), and then seal the workpiece again. Then, a certain amount of gas is introduced into the workpiece, and then the pressure is maintained for a period of time and the air pressure inside the workpiece is tested. If the air pressure reaches the predetermined value, it means that the other end of the workpiece is also qualified.

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