Corrugated pipe ball valve with leak hunting alarm device and use method of corrugated pipe ball valve

Abstract

The invention provides a corrugated pipe ball valve with a leak hunting alarm device and a using method thereof, and belongs to the technical field of ball valves.The corrugated pipe ball valve comprises a valve body and a valve rod rotating on the valve body, a ball is fixed to one end of the valve rod, the corrugated pipe ball valve further comprises a butt joint pipe fixed to the valve body, a top cover is fixed to the butt joint pipe, and a corrugated pipe body is fixed to the outer surface, located in the butt joint pipe, of the valve rod; a handle is installed at one end of the valve rod, a maintenance groove is formed in the butt-joint pipe, an inspection unit matched with the maintenance groove is arranged on the butt-joint pipe, and the inspection unit is used for testing whether side leakage and water seepage happen to the corrugated pipe body or not; the corrugated pipe body is made of multiple layers of metal materials, media can be prevented from leaking from the connecting position of the ball body and the valve rod, pressure and temperature changes can be borne, and it is guaranteed that the sealing performance of the valve is stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and in particular to a bellows ball valve with a leak detection and alarm device and its usage method. Background Art

[0002] A ball valve is a common type of valve and has extensive applications in both industrial and civil fields. It relies on the rotation of a sphere around the axis of a valve stem to control the opening and closing of the valve and the on-off of fluid passage. When the through-hole of the sphere aligns with the pipeline axis, the valve is in the open state and the fluid can pass through freely. When the sphere rotates by °, the sealing surface of the sphere closely fits with the valve seat, the valve closes, and the fluid passage is blocked; In the current market, as a widely used type of valve, the working principle of a ball valve is mainly to rotate the sphere around the axis of the valve stem to complete the opening and closing actions of the valve. However, when the ball valve is operated and used for a long time, a problem will be encountered, that is, when the valve stem rotates along the axis, it will rub against the valve body. This continuous friction will cause wear of the valve stem and the valve body. As the wear intensifies, gaps will form between the valve stem and the valve body, and these gaps may ultimately lead to fluid leakage; Chinese Patent Document Publication No. (CN118499519B) "discloses a bellows seal ball valve, including: a valve core is rotatably installed in the inner cavity of a valve seat, and shaft rods are fixedly connected to both sides of the surface of the valve core; an upper cover is fixed to the surface of the valve seat and covers the driving component, protective covers are fixed to both ends of the upper cover and cover the turntable, two installation grooves are opened inside the upper cover and are concentric with the two shaft rods respectively, both ends of the bellows are turned up to form flanges, and annular gaskets are adhesively bonded to the surfaces of the flanges. A thrust spring is sleeved outside the bellows, and both ends of the thrust spring press against the two flanges respectively; the beneficial effect is that by fixedly connecting shaft rods to both sides of the surface of the valve core, and fixedly connecting a turntable to one end of the shaft rod, when liquid leaks between the valve core and the valve seat, the liquid is only retained in the inner cavity of the installation groove and will not contact the turntable and the driving component, thereby avoiding the excessive rotation resistance of the valve core caused by rusting of the turntable and the driving component." In the above patent document, although it can avoid the excessive rotation resistance of the valve core caused by corrosion, it is difficult to solve the situation of leakage caused by the friction between the valve stem operation and the valve body to form gaps. Moreover, it is impossible to detect a small amount of side leakage at the ball valve, nor can it detect and side leak. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a bellows ball valve with a leak detection and alarm device and its usage method. The bellows body is made of multiple layers of metal materials, which can prevent the leakage of the medium from the connection between the sphere and the valve stem, and can withstand pressure and temperature changes, ensuring the stable and reliable sealing performance of the valve.

[0004] To solve the above technical problems, the present invention is solved by the following technical solutions. During the long-term use of a ball valve, the friction between the valve stem and the valve body will cause wear, and the formed gap may cause fluid leakage problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A bellows ball valve with a leak detection and alarm device and its usage method, including: A valve body and a valve stem rotatable on the valve body. One end of the valve stem is fixed with a ball, and further includes: A butt joint pipe fixed on the valve body. A top cover is fixed on the butt joint pipe. A bellows body is fixed on the outer surface of the valve stem located inside the butt joint pipe. A handle is installed at one end of the valve stem. An inspection slot is opened on the butt joint pipe. An inspection unit adapted to the inspection slot is arranged on the butt joint pipe. The inspection unit is used to test whether the bellows body has side leakage and water seepage.

[0006] Preferably, the inspection unit includes: At least two mounting rings are fixed on the butt joint pipe, and a cover plate is slidably connected between the two mounting rings. A groove is opened on the cover plate, and a test paper is arranged in the groove. A positioning member adapted to the mounting ring is arranged on the cover plate, and the positioning member is used to limit the position of the cover plate.

[0007] Preferably, on one side wall adjacent to the two mounting rings, sliding grooves are opened. A sliding rod slidably connected in the sliding groove is fixed on the cover plate, and a channel communicating with the sliding groove is opened on the mounting ring.

[0008] Preferably, the positioning member includes: A movable groove is opened on the cover plate, a push plate is slidably connected in the movable groove, a rod body is fixed on the push plate, a limiting ring is fixed at one end of the rod body, a limiting groove communicating with the sliding groove is opened on the mounting ring, the limiting ring is adapted to the limiting groove, and a spring a is fixed on the rod body. One end of the spring a is fixed in the limiting groove, and the other end of the spring a is fixed on the push plate.

[0009] Preferably, a progressive mechanism is arranged on the mounting ring. The progressive mechanism includes: A hinge seat a fixed on the mounting ring, a connecting rod is rotatably connected to the hinge seat a through a rotating rod, a limiting member adapted to the connecting rod is arranged on the hinge seat a, and the limiting member is used to limit the rotation angle of the connecting rod. A mounting plate is arranged on the cover plate, a mounting seat is fixed on the mounting plate, a guiding rod is fixed on the mounting seat, and a guiding groove for the guiding rod to slidably connect is opened on the connecting rod. The mounting plate is threadedly connected with a screw rod through a threaded hole. A rotating wheel is fixed at one end of the screw rod, a pressing plate is rotatably connected at the other end of the screw rod, a through groove adapted to the pressing plate is opened on the cover plate, and the through groove is communicated with the groove.

[0010] Preferably, an elastic rod is fixed on the groove, and a bearing plate is arranged in the groove. A clamping groove for clamping connection with the elastic rod is formed on the bearing plate, and the test paper is fixed to the bearing plate.

[0011] Preferably, a roller is rotatably connected to the sliding rod, and the roller is slidably connected to the outer surface of the docking pipe.

[0012] Preferably, the limiting member includes: an installation groove is formed on the connecting rod, and a small gear is fixed on the rotating rod and located inside the installation groove. A bracket is fixed on the hinge seat a, a mounting rod is fixed on the bracket, a pulling ball is fixed at one end of the mounting rod, a toothed plate meshing 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.

[0013] Preferably, a plurality of guide rods are fixed on the pressing plate, the guide rods are slidably penetrated through the additional plate, a limiting ring is fixed at one end of the guide rod, and the diameter value of the limiting ring is greater than the diameter value of the guide rod.

[0014] A bellows ball valve with a leak detection and alarm device includes the following steps: S1. Cut off the fluid state in the valve body. By rotating the handle, the valve stem is stressed and rotates. The valve stem drives the ball to rotate around its axis. When the ball rotates, the bellows body will expand and contract with the movement of the ball, so as to form a dynamic sealing space between the ball and the valve stem. S2. Inspect whether the bellows body is damaged and leaked. By rotating the runner, the screw rod rotates synchronously. Utilizing the thread transmission effect between the screw rod and the threaded hole, the pressing plate is driven to move away from the through groove, so as to relieve the extrusion of the bearing plate and the test paper, and then the push plate can be pushed to move, driving the limit ring to move synchronously until the limit ring is separated from the limit groove, and then the limit on the cover plate is released, and the cover plate can be pushed to move along the direction where the chute is opened until the cover plate cannot be moved, and then the cover plate can be turned outwards. By observing the color change of the test paper, it can be judged whether the bellows body is broken, damaged or leaked.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the setting of the inspection unit, the present invention can more clearly and intuitively judge whether the bellows body has been damaged or leaked. Such measures enable the staff to take actions promptly, whether it is to replace the bellows or carry out necessary maintenance work. This method effectively solves the problem that due to the inability to observe the damage of the bellows in time, excessive wear occurs between the valve stem and the valve body, and then leakage problems are caused.

[0017] 2. Through the setting of the progressive mechanism in the present invention, after the cover plate precisely reaches the preset specified position, an appropriate pressure can be applied to the test paper. The application of this pressure ensures that the test paper can fit more closely with the corrugated pipe body, thereby effectively improving the monitoring accuracy of whether the corrugated pipe body is damaged or leaks. The overall structure design is simple and has high reliability at the same time.

[0018] 3. In the present invention, the corrugated pipe body is made of multi-layer metal materials, which has good flexibility and sealing performance. The sealing function of the corrugated pipe body is mainly to prevent the medium from leaking from the connection between the sphere and the valve stem to the outside of the valve, and at the same time can also withstand certain pressure and temperature changes to ensure the stable and reliable sealing performance of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is Figure 1 the enlarged schematic diagram of the structure of area A in Figure 3 is the side view structural schematic diagram of the present invention; Figure 4 is Figure 3 the enlarged schematic diagram of the structure of area B in Figure 5 is the side sectional view structural schematic diagram of the present invention; Figure 6 is the rear view structural schematic diagram of the present invention; Figure 7 is Figure 6 the enlarged schematic diagram of the structure of area C in Figure 8 is Figure 6 the enlarged schematic diagram of the structure of area D in Figure 9 is the structural schematic diagram of the carrier plate of the present invention; Figure 10 is the structural schematic diagram of the cover plate of the present invention; Figure 11 is the structural schematic diagram of the maintenance slot of the present invention.

[0021] Description of figure numbers: 1. Valve body; 2. Valve stem; 3. Sphere; 4. Docking pipe; 5. Top cover; 6. Bellows body; 7. Handle; 8. Maintenance groove; 9. Inspection unit; 10. Installation ring; 11. Cover plate; 12. Groove; 13. Detection paper; 14. Positioning piece; 15. Slide groove; 16. Slide bar; 17. Channel; 18. Movable groove; 19. Push plate; 20. Rod body; 21. Limiting ring; 22. Limiting groove; 23. Spring a; 24. Progressive mechanism; 25. Hinge seat a; 26. Rotating rod; 27. Connecting rod; 28. Limiting piece; 29. Additional mounting plate; 30. Mounting seat; 31. Guide rod; 32. Guide groove; 33. Screw; 34. Runner; 35. Pressure plate; 36. Through groove; 37. Elastic rod; 38. Bearing plate; 39. Card slot; 40. Roller; 41. Installation groove; 42. Small gear; 43. Bracket; 44. Installation rod; 45. Pulling ball; 46. Toothed plate; 47. Spring b; 48. Guide rod; 49. Limiting ring. Detailed implementation mode

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be used in other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present invention.

[0024] Those skilled in the art should understand that in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and is a simplified description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0025] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, and in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0026] Embodiment 1: Please refer to Figure 1 - Figure 11, A bellows ball valve with a leak detection and alarm device and its usage method, comprising: a valve body 1 and a valve stem 2 rotatably arranged on the valve body 1, with a sphere 3 fixed at one end of the valve stem 2; further comprising: a docking pipe 4 fixed on the valve body 1, with a top cover 5 fixed on the docking pipe 4, a bellows body 6 fixed on the outer surface of the valve stem 2 inside the docking pipe 4, a handle 7 installed at one end of the valve stem 2, a maintenance slot 8 opened on the docking pipe 4, and an inspection unit 9 arranged on the docking pipe 4 and adapted to the maintenance slot 8, the inspection unit 9 being used to test whether the bellows body 6 has leakage and water seepage; It should be noted that the bellows body 6 is made of multi-layer metal materials, having 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 sphere 3 and the valve stem 2 to the outside of the valve, and at the same time, it can also withstand certain pressure and temperature changes to ensure the stable and reliable sealing performance of the valve; It also should be noted that by rotating the handle 7, the valve stem 2 and the sphere 3 are driven to rotate synchronously. When the sphere 3 rotates, the bellows body 6 will expand and contract along with the movement of the sphere 3, so as to form a dynamic sealing space between the sphere 3 and the valve stem 2, ensuring that the valve body 1 has good sealing performance.

[0027] In this solution, a bellows ball valve with a leak detection and alarm device includes the following steps: S1. Cut off the fluid state in the valve body 1. By rotating the handle 7, the valve stem 2 is forced to rotate. The valve stem 2 will drive the sphere 3 to rotate around its axis. When the sphere 3 rotates, the bellows body 6 will expand and contract along with the movement of the sphere 3, so as to form a dynamic sealing space between the sphere 3 and the valve stem 2; S2. Inspect whether the bellows body 6 is damaged and leaking. By rotating the runner 34, the screw 33 rotates synchronously. Utilizing the thread transmission effect between the screw 33 and the threaded hole, the pressing plate 35 is then driven to move away from the through slot 36, thereby releasing the extrusion on the bearing plate 38 and the test paper 13, and then the push plate 19 can be pushed to move, driving the limit ring 21 to move synchronously until the limit ring 21 is separated from the limit slot 22, and then the limit on the cover plate 11 is released, and the cover plate 11 can be pushed to move along the direction in which the sliding slot 15 is opened until the cover plate 11 cannot be moved any further, and then the cover plate 11 can be turned outwards. By observing the color change of the test paper 13, it can be judged whether the bellows body 6 has cracks, damage and leakage.

[0028] Further, the inspection unit 9 includes: at least two mounting rings 10 are fixed on the butt joint pipe 4, and a cover plate 11 is slidably connected between the two mounting rings 10. A groove 12 is formed on the cover plate 11, and a test paper 13 is arranged in the groove 12. A roller 40 is rotatably connected to the sliding rod 16, and the roller 40 is slidably connected to the outer surface of the butt joint pipe 4. By adding the roller 40, the stability and smoothness of the cover plate 11 during the moving operation can be effectively improved, and the situation of jamming when the cover plate 11 moves can be avoided; Wherein, a sliding groove 15 is formed on one side wall adjacent to the two mounting rings 10, a sliding rod 16 slidably connected to the inside of the sliding groove 15 is fixed on the cover plate 11, and a channel 17 communicated with the sliding groove 15 is formed on the mounting ring 10. By sliding the sliding rod 16 in the sliding groove 15, not only can it play a guiding role in the movement of the cover plate 11, but also the stability of the cover plate 11 during movement can be improved; In addition, an elastic rod 37 is fixed on the groove 12, and a bearing plate 38 is arranged in the groove 12. A clamping groove 39 clamped and connected with the elastic rod 37 is formed on the bearing plate 38. The material of the bearing plate 38 is set as a soft material, and the test paper 13 is fixed to the bearing plate 38. By adding the elastic rod 37 and the clamping groove 39, it is convenient to disassemble and replace the test paper 13 for use, and it is convenient to replace and reinstall the test paper 13 on the cover plate 11; It should be noted that the test paper 13 is an existing product, and the principle of testing moisture is that the test paper 13 contains specific chemical reagents. When the test paper 13 comes into contact with moisture, a chemical reaction will occur, generating new compounds, resulting in a change in the color of the test paper 13; It should also be noted that through the setting of the inspection unit 9, it is possible to more clearly and intuitively judge whether the bellows body 6 has been damaged or leaked. Such a measure enables the staff to take prompt action, whether it is to replace the bellows or carry out necessary maintenance work on it. This method effectively solves the problem that due to the inability to observe the damage of the bellows in time, excessive wear occurs between the valve stem 2 and the valve body 1, and then the leakage problem occurs.

[0029] Embodiment 2: On the basis of Embodiment 1, according to Figure 1 、 Figure 2 、 Figure 6 and Figure 8 shown, it is worth specifically explaining; Specifically, a progressive mechanism 24 is provided on the mounting ring 10. The progressive mechanism 24 includes: a hinge seat a25 fixed on the mounting ring 10. A connecting rod 27 is rotatably connected to the hinge seat a25 through a rotating rod 26. A limiting member 28 adapted to the connecting rod 27 is provided on the hinge seat a25. The limiting member 28 is used to limit the rotation angle of the connecting rod 27. A mounting plate 29 is provided on the cover plate 11. A mounting seat 30 is fixed on the mounting plate 29. A guide rod 31 is fixed on the mounting seat 30. A guide groove 32 for the sliding connection of the guide rod 31 is provided on the connecting rod 27. By adding the guide rod 31 and the guide groove 32, the guiding effect of the mounting plate 29 during movement is achieved, ensuring that the mounting plate 29 maintains a relative linear motion state. The mounting plate 29 is threadedly connected with a screw rod 33 through a threaded hole. A runner 34 is fixed at one end of the screw rod 33. The other end of the screw rod 33 is rotatably connected with a pressing plate 35. A through groove 36 adapted to the pressing plate 35 is provided on the cover plate 11. And the through groove 36 is communicated with the groove 12; Further, the limiting member 28 includes: a mounting groove 41 is provided on the connecting rod 27. 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 pulling ball 45 is fixed at one end of the mounting rod 44. A toothed plate 46 meshing 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; Among them, a plurality of guide rods 48 are fixed on the pressing plate 35. The guide rods 48 are slidably penetrated through the mounting plate 29. A limiting ring 49 is fixed at one end of the guide rod 48. The diameter value of the limiting ring 49 is greater than the diameter value of the guide rod 48. By adding the guide rods 48, the guiding effect on the movement of the mounting plate 29 can be achieved, further improving the stability of the mounting plate 29 during movement; It should be noted that through the setting of the progressive mechanism 24, when the cover plate 11 accurately reaches the preset specified position, an appropriate pressure can be applied to the test paper. The application of this pressure ensures that the test paper can fit more closely with the corrugated pipe body 6, thereby effectively improving the monitoring accuracy of whether the corrugated pipe body 6 is damaged or leaks. The overall structure design is simple and has high reliability at the same time; Principle of using the progressive mechanism 24 to push the test paper close to the corrugated pipe body 6: When pulling the pulling ball 45, the mounting rod 44 moves synchronously, driving 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, then the runner 34 can be pushed to move towards the cover plate 11. When the pressing plate 35 coincides with the through groove 36, the pulling force on the pulling ball 45 can be released, causing the toothed plate 46 to engage with the pinion 42, completing the limiting state of the connecting rod 27. By rotating the runner 34, the screw rod 33 rotates synchronously. Utilizing the screw drive between the screw rod 33 and the threaded hole, the pressing plate 35 presses on the bearing plate 38, thereby ensuring a higher degree of fit between the test paper and the surface of the corrugated pipe body 6.

[0030] Embodiment 3: Please refer to Figure 6 and Figure 7 , this embodiment further illustrates other embodiments. Specifically; Specifically, a positioning member 14 adapted to the mounting ring 10 is provided on the cover plate 11. The positioning member 14 is used to limit the position of the cover plate 11. The positioning member 14 includes: a movable groove 18 is formed on the cover plate 11, a push plate 19 is slidably connected in the movable groove 18, a rod body 20 is fixed on the push plate 19, a limiting ring 21 is fixed at one end of the rod body 20, a limiting groove 22 communicating with the sliding groove 15 is formed on the mounting ring 10, the limiting ring 21 is adapted to the limiting groove 22, and a spring a23 is fixed on the rod body 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; Principle of using the positioning member 14 to limit the cover plate 11: By pushing the push plate 19 upward, the push plate 19 moves along the movable groove 18 under force, causing the rod body 20 and the limiting ring 21 to move upward synchronously. When the cover plate 11 is slid to one side of the inspection groove 8, the pressure on the push plate 19 can be released. Utilizing the elastic action of the spring a23, the push plate 19 rebounds and resets, causing the limiting ring 21 to engage with the limiting groove 22, thereby completing the limiting state of the cover plate 11; It should be noted that by providing the positioning member 14, it can ensure that after the cover plate 11 reaches the specified position, an effective limiting operation is performed on it. Such a measure can significantly reduce the phenomenon of unexpected displacement of the cover plate 11 during the working process, thereby greatly improving the guarantee and reliability of the seepage monitoring of the corrugated pipe body 6. In addition, the entire operation process is simple and easy to perform, and users can easily master it. At the same time, this method also has high stability and reliability.

[0031] In this solution, the process of detecting whether the corrugated pipe body 6 leaks: First, by using the progressive mechanism 24 to adjust the distance between the pressing plate 35 and the groove 12, the push plate 19 can be pushed upward, thereby releasing the limit on the cover plate 11; Secondly, move the cover plate 11 until it cannot move to the other side of the chute 15. By flipping the cover plate 11, the slide rod 16 passes through the channel 17, causing the cover plate 11 to be separated from the docking pipe 4, so that the color change of the test paper can be observed, and thus it is possible to visually judge whether the corrugated pipe body 6 leaks; Then, the state of the corrugated pipe body 6 can be observed through the inspection slot 8. When it is necessary to use the test paper again to monitor whether the corrugated pipe body 6 seeps, flip the cover plate 11 and place it in the chute 15. While pushing the push plate 19 upward, move the cover plate 11. When the cover plate 11 reaches the side of the inspection slot 8, utilize the elasticity of the spring a23 to drive the limiting ring 21 to engage with the limiting slot 22 to complete the limiting of the cover plate 11; Finally, use the progressive mechanism 24 to press the bearing plate 38 and the test paper, so that the test paper fits more closely to the corrugated pipe body 6.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.

Claims

1. A bellows ball valve with a leak detection alarm device, comprising: A valve body (1) and a valve stem (2) rotating on the valve body (1), wherein a ball (3) is fixed to one end of the valve stem (2); It is characterized by further comprising: A butt-joint pipe (4) is fixed on the valve body (1), a top cover (5) is fixed on the butt-joint pipe (4), a bellows body (6) is fixed on the outer surface of the valve stem (2) located inside the butt-joint pipe (4), a handle (7) is mounted on one end of the valve stem (2), an inspection groove (8) is provided on the butt-joint pipe (4), and an inspection unit (9) matched with the inspection groove (8) is provided on the butt-joint pipe (4), and the inspection unit (9) is used to test whether the bellows body (6) has side leakage or water seepage.

2. A bellows ball valve with a leak detection alarm device according to claim 1, characterized in that: The inspection unit (9) comprises: at least two mounting rings (10) are fixed on the butt joint tube (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 detection paper (13) is arranged in the groove (12), and a positioning member (14) adapted to the mounting ring (10) is provided on the cover plate (11), and the positioning member (14) is used to limit the position of the cover plate (11).

3. A bellows ball valve with a leak detection alarm device according to claim 2, characterized in that: A sliding groove (15) is provided on one side wall adjacent to the two mounting rings (10), a sliding rod (16) slidably connected to the sliding groove (15) is fixed on the cover plate (11), and a channel (17) connected to the sliding groove (15) is provided on the mounting ring (10).

4. A bellows ball valve with a leak detection alarm device according to claim 2, characterized in that: The positioning member (14) comprises: 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 body (20) is fixed on the push plate (19), a limiting ring (21) is fixed to one end of the rod body (20), a limiting groove (22) connected to the slide groove (15) is provided on the mounting ring (10), the limiting ring (21) is matched with the limiting groove (22), and a spring a (23) is fixed on the rod body (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 to the push plate (19).

5. The 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) comprising: an articulated seat a (25) fixed on the mounting ring (10), the articulated seat a (25) being rotatably connected to a connecting rod (27) via a rotating rod (26), the articulated seat a (25) being provided with a limiting member (28) adapted to the connecting rod (27), the limiting member (28) being used to limit the rotation angle of the connecting rod (27), the cover plate (11) being provided with an additional plate (29), the additional plate (29) being fixed with the mounting seat ( 30), a guide rod (31) is fixed on the mounting seat (30), and a guide groove (32) is provided on the connecting rod (27) for sliding connection with the guide rod (31), the mounting plate (29) is threadedly connected with a screw rod (33) through a threaded hole, a rotating wheel (34) is fixed to one end of the screw rod (33), and a pressure plate (35) is rotatably connected to the other end of the screw rod (33), and 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).

6. The bellows ball valve with a leak detection alarm device according to claim 2, characterized in that: An elastic rod (37) is fixed on the groove (12), and a carrying plate (38) is arranged in the groove (12). A card slot (39) is provided on the carrying plate (38) and is engaged with the elastic rod (37). The detection paper (13) is fixed to the carrying plate (38).

7. The bellows ball valve with a leak detection alarm device according to claim 3, characterized in that: A roller (40) is rotatably connected to the sliding rod (16), and the roller (40) is slidably connected to the outer surface of the butt joint tube (4).

8. The bellows ball valve with a leak detection alarm device according to claim 5, characterized in that: The limiting member (28) comprises: 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 on one end of the mounting rod (44), a toothed plate (46) meshingly connected with the small gear (42) is fixed on 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).

9. The bellows ball valve with a leakage detection alarm device according to claim 5, characterized in that: A plurality of guide rods (48) are fixed on the pressure plate (35), and the guide rods (48) are slidably arranged to penetrate the mounting plate (29). A limiting ring (49) is fixed on one end of the guide rod (48), and the diameter of the limiting ring (49) is greater than the diameter of the guide rod (48).

10. A method for using a bellows ball valve with a leak detection alarm device, applied to a bellows ball valve with a leak detection alarm device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, cut off the fluid state in the valve body (1), and by turning the handle (7), the valve stem (2) is subjected to force and rotates, and the valve stem (2) drives the ball (3) to rotate around its axis. When the ball (3) rotates, the bellows body (6) expands and contracts with the movement of the ball (3), thereby forming a dynamic sealing space between the ball (3) and the valve stem (2); S2. Check whether the corrugated tube body (6) is damaged or leaking. The rotating wheel (34) is rotated to make the screw rod (33) rotate synchronously. The screw transmission effect between the screw rod (33) and the threaded hole is used to drive the pressure plate (35) to move away from the through groove (36), thereby releasing the squeezing of the bearing plate (38) and the detection paper (13). The push plate (19) can be pushed to move, driving the limit ring (21) to move synchronously until the limit ring (21) is separated from the limit groove (22). The limit on the cover plate (11) is then 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) is pushed to a point where it cannot move. The cover plate (11) can be turned outward, and by observing the color change of the detection paper (13), it can be judged whether the corrugated tube body (6) is broken, damaged, or leaking.

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