A corrugated ball valve with a leak detection alarm device and a method of using the same

Abstract

The application provides a corrugated pipe ball valve with a leakage detection alarm device and a use method thereof, and belongs to the technical field of ball valves, and comprises a valve body, a valve rod rotating on the valve body, a ball body fixed at one end of the valve rod, a butt joint pipe fixed on the valve body, a top cover fixed on the butt joint pipe, a corrugated pipe body fixed on the outer surface of the valve rod inside the butt joint pipe, a handle installed at one end of the valve rod, an inspection slot formed in the butt joint pipe, and an inspection unit arranged on the butt joint pipe and matched with the inspection slot, the inspection unit being used for testing whether the corrugated pipe body is side-leaking and seeping water. The corrugated pipe body is made of multiple layers of metal materials, can prevent medium from leaking from the connection position between the ball body and the valve rod, can withstand pressure and temperature changes, and ensures that the sealing performance of the valve is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and in particular to a bellows ball valve with a leak detection alarm device and its usage method. Background Technology

[0002] Ball valves are a common type of valve, widely used in industrial and civil fields. They rely on the rotation of a ball around the axis of the valve stem to open and close the valve and control the flow of fluid. When the through hole of the ball is aligned with the axis of the pipe, the valve is open and the fluid can pass freely. When the ball rotates 30 degrees, the sealing surface of the ball is tightly fitted with the valve seat, the valve is closed, and the fluid is prevented from passing through.

[0003] In the current market, ball valves are a widely used type of valve. Their working principle is mainly based on the rotation of a ball around the axis of the valve stem to complete the opening and closing of the valve. However, when ball valves are operated and used for a long time, a problem will be encountered: when the valve stem rotates along the axis, it will rub against the valve body. This friction will cause wear on the valve stem and valve body under continuous action. As the wear intensifies, gaps will form between the valve stem and valve body, and these gaps may eventually lead to fluid leakage.

[0004] Chinese patent publication number (CN118499519B) discloses a bellows-sealed ball valve, comprising: a valve core rotatably mounted in the inner cavity of a valve seat, with shafts fixedly connected to both sides of the valve core surface; a top cover fixed to the surface of the valve seat and covering the drive assembly, with protective covers fixed to both ends of the top cover and covering the turntable; two mounting grooves are opened inside the top cover and concentric with the two shafts respectively; both ends of the bellows are folded to form flanges, and annular sealing gaskets are adhered to the surface of the flanges; a thrust spring is sleeved on the outer side of the bellows and pushes... The force spring presses against two flanges at both ends; the beneficial effect is that, by fixing shafts to both sides of the valve core surface, and fixing a turntable to one end of the shaft, when liquid leakage occurs between the valve core and the valve seat, the liquid only remains in the inner cavity of the mounting groove and will not contact the turntable and drive assembly, thereby avoiding excessive rotational resistance of the valve core due to corrosion of the turntable and drive assembly. While the aforementioned patent document can prevent excessive rotational resistance of the valve core due to corrosion, it is difficult to solve the problem of leakage caused by gaps created by friction between the valve stem and the valve body. Furthermore, it cannot detect minute side leaks at the ball valve, nor can it detect side leaks. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bellows ball valve with a leak detection alarm device and its usage method. The bellows body is made of multiple layers of metal materials, which can prevent the medium from leaking from the connection between the ball and the valve stem, and can withstand pressure and temperature changes, ensuring stable and reliable valve sealing performance.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution to the problem that during long-term use of ball valves, friction between the valve stem and the valve body can lead to wear and the formation of gaps that may cause fluid leakage.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A bellows ball valve with a leak detection alarm device and its usage method, comprising:

[0009] The valve body and the valve stem that rotates on the valve body, wherein a ball is fixed to one end of the valve stem, and further includes:

[0010] A connecting pipe is fixed to the valve body, and a top cover is fixed on the connecting pipe. A bellows body is fixed on the outer surface of the valve stem located inside the connecting pipe. A handle is installed at one end of the valve stem. An inspection groove is opened on the connecting pipe. An inspection unit adapted to the inspection groove is provided on the connecting pipe. The inspection unit is used to test whether the bellows body has side leakage.

[0011] Preferably, the inspection unit includes: at least two mounting rings fixed on the connecting pipe, and a cover plate slidably connected between the two mounting rings; a groove is provided on the cover plate, and a test paper is disposed in the groove; a positioning element adapted to the mounting ring is provided on the cover plate, and the positioning element is used to limit the position of the cover plate.

[0012] Preferably, each of the two adjacent sidewalls of the mounting rings is provided with a sliding groove, a sliding rod is fixed on the cover plate and slidably connected to the sliding groove, and a channel is provided on the mounting ring that communicates with the sliding groove.

[0013] Preferably, the positioning component includes: a movable groove is provided on the cover plate, a push plate is slidably connected in the movable groove, a rod is fixed on the push plate, a limit ring is fixed at one end of the rod, a limit groove communicating with the sliding groove is provided on the mounting ring, the limit ring is adapted to the limit groove, and a spring a is fixed on the rod, one end of the spring a is fixed in the limit groove, and the other end of the spring a is fixed on the push plate.

[0014] Preferably, the mounting ring is provided with a progressive mechanism, the progressive mechanism including: a hinge seat a fixed on the mounting ring, a connecting rod rotatably connected to the hinge seat a via a rotating rod, a limiting member adapted to the connecting rod on the hinge seat a, the limiting member being used to limit the rotation angle of the connecting rod, an mounting plate provided on the cover plate, a mounting base fixed on the mounting plate, a guide rod fixed on the mounting base, and a guide groove for sliding connection of the guide rod on the connecting rod, a screw threadedly connected to the mounting plate via a threaded hole, a rotating wheel fixed to one end of the screw, a pressure plate rotatably connected to the other end of the screw, and a through groove adapted to the pressure plate on the cover plate, the through groove being connected to the groove.

[0015] Preferably, an elastic rod is fixed on the groove, and a bearing plate is provided in the groove. The bearing plate has a slot that engages with the elastic rod, and the test paper is fixed to the bearing plate.

[0016] Preferably, a roller is rotatably connected to the slide rod, and the roller is slidably connected to the outer surface of the connecting tube.

[0017] Preferably, the limiting component includes: a mounting groove is provided on the connecting rod, and a small gear located inside the mounting groove is fixed on the rotating rod; a bracket is fixed on the hinge seat a; a mounting rod is fixed on the bracket; a pull ball is fixed at one end of the mounting rod; a toothed plate that meshes with the small gear is fixed at the other end of the mounting rod; a spring b is sleeved on the mounting rod; one end of the spring b is fixed to the toothed plate; and the other end of the spring b is fixed to the bracket.

[0018] Preferably, a plurality of guide rods are fixed on the pressure plate, the guide rods are slidably connected to the mounting plate, and a limiting ring is fixed to one end of the guide rod, the diameter of the limiting ring being larger than the diameter of the guide rod.

[0019] A bellows ball valve with a leak detection alarm device includes the following steps:

[0020] S1. Cut off the fluid state in the valve body. By turning the handle, the valve stem is subjected to force and rotates. The valve stem will drive the ball to rotate around its axis. When the ball rotates, the bellows will expand and contract with the movement of the ball, thus forming a dynamic sealing space between the ball and the valve stem.

[0021] S2. To check for damage and leakage in the corrugated pipe body, rotate the rotating wheel to make the screw rotate synchronously. Utilize the threaded transmission between the screw and the threaded hole to move the pressure plate away from the through groove, thereby relieving the pressure on the support plate and the test paper. This allows the push plate to move, driving the limiting ring to move synchronously until the limiting ring separates from the limiting groove. Then, the limiting of the cover plate is released, and the cover plate can be pushed along the opening direction of the slide groove until it can no longer be moved. The cover plate can then be flipped outwards. By observing the color change of the test paper, it is possible to determine whether the corrugated pipe body has broken, damaged, or is leaking.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By setting up an inspection unit, this invention can more clearly and intuitively determine whether the bellows body has been damaged or leaking. This measure enables staff to take quick action, whether to replace the bellows or perform necessary maintenance. This method effectively solves the problem of excessive wear between the valve stem and valve body, which leads to leakage, due to the inability to observe the damage to the bellows in time.

[0024] 2. Through the progressive mechanism, the present invention can apply appropriate pressure to the test paper after the cover plate accurately reaches the preset designated position. This pressure ensures that the test paper can fit more tightly with the corrugated pipe body, thereby effectively improving the monitoring accuracy of whether the corrugated pipe body is damaged or leaking. The entire structure is simple in design and has high reliability.

[0025] 3. The present invention uses a bellows body made of multi-layer metal materials, which has good flexibility and sealing performance. The sealing function of the bellows body is mainly to prevent the medium from leaking to the outside of the valve from the connection between the ball and the valve stem. At the same time, it can withstand certain pressure and temperature changes, ensuring the valve's sealing performance is stable and reliable. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of region A in the middle;

[0029] Figure 3 This is a side view of the structure of the present invention;

[0030] Figure 4 for Figure 3 Enlarged schematic diagram of the structure of region B in the middle;

[0031] Figure 5 This is a side sectional view of the present invention;

[0032] Figure 6 This is a schematic diagram of the rear view structure of the present invention;

[0033] Figure 7 for Figure 6 Enlarged schematic diagram of the structure of region C in the middle;

[0034] Figure 8 for Figure 6 Enlarged schematic diagram of the structure of region D in the middle;

[0035] Figure 9 This is a schematic diagram of the structure at the support plate of the present invention;

[0036] Figure 10 This is a schematic diagram of the cover plate structure of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the inspection slot of the present invention.

[0038] Drawing number explanation: 1. Valve body; 2. Valve stem; 3. Ball; 4. Connecting pipe; 5. Top cover; 6. Bellows body; 7. Handle; 8. Inspection slot; 9. Inspection unit; 10. Mounting ring; 11. Cover plate; 12. Groove; 13. Test paper; 14. Positioning element; 15. Slide groove; 16. Slide rod; 17. Channel; 18. Movable groove; 19. Push plate; 20. Rod body; 21. Limiting ring; 22. Limiting groove; 23. Spring a; 24. Progression mechanism; 25. Hinge 26. Seat a; 27. Rotating rod; 28. Connecting rod; 29. ​​Limiting component; 30. Mounting plate; 31. Guide rod; 32. Guide groove; 33. Screw; 34. Rotating wheel; 35. Pressure plate; 36. Through groove; 37. Elastic rod; 38. Bearing plate; 39. Slot; 40. Roller; 41. Mounting groove; 42. Pinion; 43. Bracket; 44. Mounting rod; 45. Pull ball; 46. Toothed plate; 47. Spring b; 48. Guide rod; 49. Restricting ring. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings.

[0040] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0041] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0042] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0043] Example 1: Please refer to Figure 1 - Figure 11 A bellows ball valve with a leak detection alarm device and its usage method include: a valve body 1 and a rotating valve stem 2 on the valve body 1, with a ball 3 fixed at one end of the valve stem 2; it also includes: a connecting pipe 4 fixed on the valve body 1, a top cover 5 fixed on the connecting pipe 4, a bellows body 6 fixed on the outer surface of the valve stem 2 inside the connecting pipe 4, a handle 7 installed at one end of the valve stem 2, a maintenance groove 8 opened on the connecting pipe 4, and an inspection unit 9 adapted to the maintenance groove 8 on the connecting pipe 4, the inspection unit 9 being used to test whether the bellows body 6 has side leakage;

[0044] It should be noted that the bellows body 6 is made of multi-layer metal material, which has good flexibility and sealing performance. The sealing function of the bellows body 6 is mainly to prevent the medium from leaking from the connection between the ball 3 and the valve stem 2 to the outside of the valve. At the same time, it can withstand certain pressure and temperature changes to ensure the valve's sealing performance is stable and reliable.

[0045] It should also be noted that by turning the handle 7, the valve stem 2 and the ball 3 are driven to rotate synchronously. When the ball 3 rotates, the bellows body 6 will extend and retract with the movement of the ball 3, thereby forming a dynamic sealing space between the ball 3 and the valve stem 2 to ensure that the valve body 1 has good sealing performance.

[0046] In this solution, a bellows ball valve with a leak detection alarm device includes the following steps:

[0047] S1. Cut off the fluid state in valve body 1. By turning handle 7, valve stem 2 is subjected to force and rotates. Valve stem 2 will drive ball 3 to rotate around its axis. When ball 3 rotates, bellows body 6 will expand and contract with the movement of ball 3, thereby forming a dynamic sealing space between ball 3 and valve stem 2.

[0048] S2. To check whether the bellows body 6 is damaged or leaking, rotate the wheel 34 to make the screw 33 rotate synchronously. Utilize the threaded transmission between the screw 33 and the threaded hole to drive the pressure plate 35 away from the through groove 36, thereby relieving the pressure on the bearing plate 38 and the test paper 13. This will push the push plate 19 to move, driving the limiting ring 21 to move synchronously until the limiting ring 21 separates from the limiting groove 22. Then, the limiting of the cover plate 11 will be released, and the cover plate 11 can be pushed to move along the opening direction of the slide groove 15 until the cover plate 11 can no longer move. Then, the cover plate 11 can be flipped outward. By observing the color change of the test paper 13, it can be determined whether the bellows body 6 is broken, damaged, or leaking.

[0049] Furthermore, the inspection unit 9 includes: at least two mounting rings 10 fixed on the connecting pipe 4, and a cover plate 11 slidably connected between the two mounting rings 10. The cover plate 11 has a groove 12, and a test paper 13 is placed in the groove 12. A roller 40 is rotatably connected to the slide rod 16, and the roller 40 is slidably connected to the outer surface of the connecting pipe 4. By adding the roller 40, the stability and smoothness of the cover plate 11 during the movement operation can be effectively improved, and the situation of jamming when the cover plate 11 moves can be avoided.

[0050] Among them, each of the two mounting rings 10 has a sliding groove 15 on one side wall adjacent to each other. A sliding rod 16 is fixed on the cover plate 11 and is slidably connected to the sliding groove 15. A channel 17 is opened on the mounting ring 10 and is connected to the sliding groove 15. The sliding rod 16 slides in the sliding groove 15, which not only guides the cover plate 11 when it moves, but also improves the stability of the cover plate 11 when it moves.

[0051] In addition, an elastic rod 37 is fixed on the groove 12, and a bearing plate 38 is provided in the groove 12. The bearing plate 38 has a slot 39 that engages with the elastic rod 37. The bearing plate 38 is made of a soft material. The test paper 13 is fixed to the bearing plate 38. With the addition of the elastic rod 37 and the slot 39, it is convenient to disassemble and replace the test paper 13 for use, and it is easy to replace and reinstall the test paper 13 on the cover plate 11.

[0052] It should be noted that the test paper 13 is an existing product. The principle behind its ability to test moisture is that the test paper 13 contains specific chemical reagents. When the test paper 13 comes into contact with moisture, a chemical reaction occurs, generating new compounds that cause the color of the test paper 13 to change.

[0053] It should also be noted that by setting up inspection unit 9, it is possible to more clearly and intuitively determine whether the bellows body 6 has been damaged or leaking. This measure enables staff to take action quickly, whether to replace the bellows or carry out necessary maintenance. This method effectively solves the problem of excessive wear between valve stem 2 and valve body 1 caused by the inability to observe the damage to the bellows in time, which in turn leads to leakage.

[0054] Example 2: Based on Example 1, according to Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown, it is worth explaining in detail;

[0055] Specifically, the mounting ring 10 is provided with a progressive mechanism 24, which includes: a hinge seat a25 fixed on the mounting ring 10; a connecting rod 27 rotatably connected to the hinge seat a25 via a rotating rod 26; a limiting member 28 adapted to the connecting rod 27 on the hinge seat a25; the limiting member 28 is used to limit the rotation angle of the connecting rod 27; an additional plate 29 is provided on the cover plate 11; a mounting base 30 is fixed on the additional plate 29; a guide rod 31 is fixed on the mounting base 30; and the connecting rod 27... The upper part is provided with a guide groove 32 for sliding connection of the guide rod 31. The addition of the guide rod 31 and the guide groove 32 serves to guide the installation plate 29 when it moves, ensuring that the installation plate 29 maintains a relatively linear motion state. The installation plate 29 is threadedly connected to a screw 33 through a threaded hole. One end of the screw 33 is fixed with a rotating wheel 34, and the other end of the screw 33 is rotatably connected to a pressure plate 35. The cover plate 11 is provided with a through groove 36 that matches the pressure plate 35, and the through groove 36 is connected to the groove 12.

[0056] Furthermore, the limiting member 28 includes: a mounting groove 41 is provided on the connecting rod 27, and a small gear 42 located inside the mounting groove 41 is fixed on the rotating rod 26; a bracket 43 is fixed on the hinge seat a25; a mounting rod 44 is fixed on the bracket 43; a pull ball 45 is fixed at one end of the mounting rod 44; a toothed plate 46 that meshes with the small gear 42 is fixed at the other end of the mounting rod 44; a spring b47 is sleeved on the mounting rod 44; one end of the spring b47 is fixed to the toothed plate 46; and the other end of the spring b47 is fixed to the bracket 43.

[0057] Among them, several guide rods 48 are fixed on the pressure plate 35. The guide rods 48 are slidably connected to the mounting plate 29. A limiting ring 49 is fixed at one end of the guide rod 48. The diameter of the limiting ring 49 is larger than the diameter of the guide rod 48. By adding the guide rods 48, the mounting plate 29 can be guided when it moves, and the stability of the mounting plate 29 when it moves is further improved.

[0058] It should be noted that, through the setting of the advancing mechanism 24, after the cover plate 11 accurately reaches the preset designated position, appropriate pressure can be applied to the test paper. The application of this pressure ensures that the test paper can fit more tightly with the corrugated pipe body 6, thereby effectively improving the monitoring accuracy of whether the corrugated pipe body 6 has been damaged or leaked. The whole structure design is simple and has high reliability.

[0059] The principle of using the progressive mechanism 24 to push the test paper close to the corrugated tube body 6 is as follows: When the pull ball 45 is pulled, the mounting rod 44 moves synchronously, which drives the toothed plate 46 to move synchronously. At this time, the spring b47 is in a compressed state and the toothed plate 46 is separated from the pinion 42, which can push the rotating wheel 34 to move towards the cover plate 11. When the pressure plate 35 matches the through groove 36, the pulling force on the pull ball 45 is released, causing the toothed plate 46 to engage with the pinion 42, completing the limiting state of the connecting rod 27. The rotating wheel 34 is rotated, which drives the screw 33 to rotate synchronously. The thread transmission between the screw 33 and the threaded hole drives the pressure plate 35 to apply pressure to the bearing plate 38, thereby ensuring a higher degree of adhesion between the test paper and the surface of the corrugated tube body 6.

[0060] Example 3: Please refer to Figure 6 and Figure 7 This embodiment further illustrates other embodiments, and it is worth specifically explaining that;

[0061] Specifically, the cover plate 11 is provided with a positioning element 14 that is adapted to the mounting ring 10. The positioning element 14 is used to limit the position of the cover plate 11. The positioning element 14 includes: a movable groove 18 is opened on the cover plate 11, a push plate 19 is slidably connected in the movable groove 18, a rod 20 is fixed on the push plate 19, a limiting ring 21 is fixed at one end of the rod 20, a limiting groove 22 is opened on the mounting ring 10 that communicates with the sliding groove 15, the limiting ring 21 is adapted to the limiting groove 22, and a spring a23 is fixed on the rod 20. One end of the spring a23 is fixed in the limiting groove 22, and the other end of the spring a23 is fixed on the push plate 19.

[0062] The principle of using positioning element 14 to limit cover plate 11 is as follows: by pushing push plate 19 upward, push plate 19 moves along movable groove 18 after being subjected to force, so that rod 20 and limiting ring 21 move upward synchronously. When cover plate 11 is slid to one side of inspection groove 8, the pressure on push plate 19 can be released. Using the elastic effect of spring a23, push plate 19 is driven to rebound and reset, so that limiting ring 21 is engaged with limiting groove 22, thereby completing the limiting state of cover plate 11.

[0063] It should be noted that by setting the positioning component 14, it can be ensured that the cover plate 11 is effectively limited after it reaches the designated position. This measure can significantly reduce the unwanted displacement of the cover plate 11 during operation, thereby greatly improving the protection and reliability of the seepage monitoring of the corrugated pipe body 6. In addition, the whole operation process is simple and easy to perform, and users can easily master it. At the same time, the method also has high stability and reliability.

[0064] In this plan, the procedure for detecting leakage in the corrugated pipe body 6 is as follows:

[0065] First, by adjusting the distance between the pressure plate 35 and the groove 12 using the advancing mechanism 24, the push plate 19 can be pushed upward, thereby releasing the restriction on the cover plate 11;

[0066] Secondly, move the cover plate 11 until it can no longer be moved on the other side of the slide 15. By flipping the cover plate 11, the slide rod 16 passes through the channel 17, causing the cover plate 11 to separate from the connecting pipe 4. The color change of the test paper can then be observed, thus allowing a direct judgment on whether the corrugated pipe body 6 is leaking.

[0067] Then, the status of the bellows body 6 can be observed through the inspection groove 8. If it is necessary to use test paper again to monitor whether the bellows body 6 has leaked, flip the cover plate 11 and place it in the slide groove 15. Push the push plate 19 upward while moving the cover plate 11. When the cover plate 11 reaches the side of the inspection groove 8, the elasticity of the spring a23 will drive the limiting ring 21 to engage with the limiting groove 22 to complete the limiting of the cover plate 11.

[0068] Finally, the advancing mechanism 24 applies pressure to the carrier plate 38 and the test paper, causing the test paper to fit more closely to the corrugated tube body 6.

[0069] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the implementation of the present invention may be made without departing from the principles.

Claims

1. A bellows ball valve with a leak detection alarm device, comprising: The valve body (1) and the valve stem (2) rotating on the valve body (1), with a ball (3) fixed at one end of the valve stem (2); Its characteristic is that it further includes: A connecting pipe (4) is fixed on the valve body (1). A top cover (5) is fixed on the connecting pipe (4). A bellows body (6) is fixed on the outer surface of the valve stem (2) inside the connecting pipe (4). A handle (7) is installed at one end of the valve stem (2). An inspection groove (8) is opened on the connecting pipe (4). An inspection unit (9) adapted to the inspection groove (8) is provided on the connecting pipe (4). The inspection unit (9) is used to test whether the bellows body (6) has side leakage. The inspection unit (9) includes: at least two mounting rings (10) are fixed on the connecting pipe (4), and a cover plate (11) is slidably connected between the two mounting rings (10). A groove (12) is provided on the cover plate (11), and a test paper (13) is provided in the groove (12). A positioning element (14) adapted to the mounting ring (10) is provided on the cover plate (11). The positioning element (14) is used to limit the position of the cover plate (11). A sliding groove (15) is provided on one side wall of each of the two mounting rings (10). A sliding rod (16) is fixed on the cover plate (11) and slidably connected to the sliding groove (15). A channel (17) connected to the sliding groove (15) is provided on the mounting ring (10).

2. A bellows ball valve with a leak detection alarm device according to claim 1, characterized in that, The positioning component (14) includes: a movable groove (18) is provided on the cover plate (11), a push plate (19) is slidably connected in the movable groove (18), a rod (20) is fixed on the push plate (19), a limiting ring (21) is fixed at one end of the rod (20), a limiting groove (22) is provided on the mounting ring (10) and communicates with the sliding groove (15), the limiting ring (21) is adapted to the limiting groove (22), and a spring a (23) is fixed on the rod (20), one end of the spring a (23) is fixed in the limiting groove (22), and the other end of the spring a (23) is fixed on the push plate (19).

3. A bellows ball valve with a leak detection alarm device according to claim 2, characterized in that, The mounting ring (10) is provided with a progressive mechanism (24), the progressive mechanism (24) includes: a hinge seat a (25) fixed on the mounting ring (10), a connecting rod (27) rotatably connected to the hinge seat a (25) via a rotating rod (26), a limiting member (28) adapted to the connecting rod (27) is provided on the hinge seat a (25), the limiting member (28) is used to limit the rotation angle of the connecting rod (27), and an additional plate (29) is provided on the cover plate (11), on which a mounting seat (29) is fixed. 30), a guide rod (31) is fixed on the mounting base (30), and a guide groove (32) is provided on the connecting rod (27) to allow the guide rod (31) to slide. The mounting plate (29) is threadedly connected to a screw (33) through a threaded hole. A rotating wheel (34) is fixed at one end of the screw (33), and a pressure plate (35) is rotatably connected to the other end of the screw (33). A through groove (36) adapted to the pressure plate (35) is provided on the cover plate (11), and the through groove (36) is connected to the groove (12).

4. A bellows ball valve with a leak detection alarm device according to claim 3, characterized in that, An elastic rod (37) is fixed on the groove (12), and a bearing plate (38) is provided in the groove (12). The bearing plate (38) has a slot (39) that engages with the elastic rod (37). The test paper (13) is fixed to the bearing plate (38).

5. A bellows ball valve with a leak detection alarm device according to claim 4, characterized in that, A roller (40) is rotatably connected to the slide rod (16), and the roller (40) is slidably connected to the outer surface of the connecting tube (4).

6. A bellows ball valve with a leak detection alarm device according to claim 5, characterized in that, The limiting component (28) includes: a mounting groove (41) is provided on the connecting rod (27), and a small gear (42) located inside the mounting groove (41) is fixed on the rotating rod (26); a bracket (43) is fixed on the hinge seat a (25); a mounting rod (44) is fixed on the bracket (43); a pull ball (45) is fixed at one end of the mounting rod (44); a toothed plate (46) that meshes with the small gear (42) is fixed at the other end of the mounting rod (44); a spring b (47) is sleeved on the mounting rod (44); one end of the spring b (47) is fixed to the toothed plate (46); and the other end of the spring b (47) is fixed to the bracket (43).

7. A bellows ball valve with a leak detection alarm device according to claim 6, characterized in that, A plurality of guide rods (48) are fixed on the pressure plate (35). The guide rods (48) are slidably connected to the mounting plate (29). A limiting ring (49) is fixed at one end of the guide rod (48). The diameter of the limiting ring (49) is greater than the diameter of the guide rod (48).

8. A method of using a bellows ball valve with a leak detection alarm device, applied to the bellows ball valve with a leak detection alarm device as described in any one of claims 4-7, characterized in that, Includes the following steps: S1. Cut off the fluid state in the valve body (1). By turning the handle (7), the valve stem (2) is subjected to force and rotates. The valve stem (2) will drive the ball (3) to rotate around its axis. When the ball (3) rotates, the bellows body (6) will expand and contract with the movement of the ball (3), thereby forming a dynamic sealing space between the ball (3) and the valve stem (2). S2. To check whether the corrugated pipe body (6) is damaged and leaking, rotate the wheel (34) to make the screw (33) rotate synchronously. Utilize the thread transmission between the screw (33) and the threaded hole to drive the pressure plate (35) away from the through groove (36), thereby relieving the squeezing of the bearing plate (38) and the test paper (13). Then push the push plate (19) to move, driving the limiting ring (21) to move synchronously until the limiting ring (21) separates from the limiting groove (22). Then release the limiting of the cover plate (11), and push the cover plate (11) to move along the opening direction of the slide groove (15) until the cover plate (11) can no longer be moved. Then flip the cover plate (11) outward and observe the color change of the test paper (13) to determine whether the corrugated pipe body (6) is broken, damaged and leaking.

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