Processing technology of a ball valve and the ball valve

Abstract

The present invention discloses a processing technology of a ball valve, which relates to the technical field of ball valves. The present invention includes the following steps: S1: Raw material cutting, cutting a rod-shaped steel bar into a disc state according to process requirements; The present invention also provides a ball valve, including a valve body, a valve core is arranged in the valve body, a valve rod is fixedly connected to the top of the valve core, and a speed control mechanism is arranged at the top of the valve body; The speed control mechanism includes a mounting plate fixedly connected to the circumference of the valve rod, an arc-shaped push ring is fixedly connected to one side of the mounting plate, and a piston is fixedly connected to the other end of the push ring. The present invention uses the flow rate of the hydraulic oil in the oil pipe to control the moving speed of the push ring, thereby restricting the rotating speed of the valve rod, avoiding the valve rod driving the valve core to rotate too fast, reducing the impact force generated by the water hammer effect, improving the service life of the product. At the same time, the shock reduction mechanism arranged on the side can discharge water to the other side of the valve body, reduce the impact force, and further improve the service life of the product.

Description

Technical Field

[0001] The present invention belongs to the technical field of ball valves, and particularly relates to a processing technology and a ball valve of a ball valve. Background Art

[0002] As is well known, a ball valve is a valve in which the closing and opening member (ball) is driven by a valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids. Among them, for a hard-sealed V-type ball valve, there is a strong shearing force between its V-type ball core and the metal valve seat surfacing with hard alloy, which is particularly suitable for media containing fibers, tiny solid particles, etc.

[0003] According to the use requirements, the existing ball valves can be divided into electric control and manual control. When the manually controlled ball valve is closed, the switching speed is uncontrollable. When the rotation speed of the valve core is too fast, the water flow in the pipeline will impact the ball valve, forming a water hammer effect and affecting the use of the ball valve. For this reason, a processing technology and a ball valve of a ball valve are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a processing technology and a ball valve of a ball valve, which utilize the flow rate of the hydraulic oil in the oil pipe to control the moving speed of the push ring, thereby restricting the rotation speed of the valve stem, avoiding the too fast rotation speed of the valve stem driving the valve core, reducing the impact force generated by the water hammer effect, improving the service life of the product. At the same time, the shock reduction mechanism arranged on the side can discharge water to the other side of the valve body, reducing the impact force and further improving the service life of the product, and solving the existing technical problems.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] A processing technology of a ball valve includes the following steps:

[0007] S1: Raw material cutting, cutting a rod-shaped steel bar into a disc state according to the process requirements.

[0008] S2: Disc hole opening, opening installation holes for installation on the cut disc, and then switching different tools to cut out the contour of the valve on the disc.

[0009] S3: Semi-finished product grinding, using a grinding machine to grind the periphery of the raw material with a contour to precise dimensions.

[0010] S4: Raw material grinding, placing the raw material with the surface ground into a grinding machine with ceramic stones, and using the ceramic stones to grind the ground raw material.

[0011] S5: Component welding, welding and fixing the processed components together through a welding process.

[0012] S6: Weld point treatment. After welding is completed, the components are first cleaned with clean water, then pickled with pickling and passivation solution, and finally put into an ultrasonic cleaning machine for cleaning;

[0013] S7: Component assembly. The cleaned raw materials are assembled and fixed according to the installation steps;

[0014] S8: Finished product inspection. The assembled ball valve is tested for sealing performance through a valve airtightness tester.

[0015] A ball valve, comprising a valve body. A valve core is arranged inside the valve body. The top of the valve core is fixedly connected with a valve rod. The connection relationship and sealing relationship among the valve body, the valve core and the valve rod are all prior arts. A speed control mechanism is arranged at the top of the valve body;

[0016] The speed control mechanism includes a mounting plate fixedly connected to the circumference of the valve rod. One side of the mounting plate is fixedly connected with an arc-shaped push ring. The other end of the push ring is fixedly connected with a piston. The top of the valve body is fixedly connected with an oil pipe that cooperates with the push ring. The piston is slidably connected inside the oil pipe. The other end of the oil pipe is fixedly communicated with an extension pipe. The circumference of the extension pipe is fixedly communicated with a discharge pipe. The top of the discharge pipe is fixedly connected with a collection tank. Hydraulic oil is arranged inside the collection tank. The top of the collection tank is fixedly connected with an air pipe with an upward opening. When the valve rod rotates, it can drive the push ring to rotate through the mounting plate, and then control the moving speed of the push ring by the flow rate of the hydraulic oil in the oil pipe, thereby restricting the rotating speed of the valve rod, avoiding the valve rod driving the valve core to rotate too fast, reducing the impact force generated by the water hammer effect, and improving the service life of the product. A regulating component for controlling the flow rate is arranged at one end of the extension pipe;

[0017] Two shock reduction mechanisms are respectively located on both sides of the valve body to reduce the impact of the water hammer reaction.

[0018] Furthermore, the regulating component includes a second threaded rod threadedly connected to one end of the extension pipe. The other end of the second threaded rod is rotatably connected with a second plug. The second plug is slidably connected with the extension pipe and is located below the discharge pipe. When the second threaded rod is rotated, it can drive the second plug to move, thereby changing the flow diameter in the discharge pipe, and further changing the rotating speed of the valve rod, improving the flexibility of product use.

[0019] Further, the impact reduction mechanism includes two elbow pipes and a connecting pipe. Both elbow pipes are fixedly connected to the circumference of the valve body and communicate with the valve body. The two elbow pipes are respectively arranged on both sides of the valve core. Flanges are fixedly connected to one end of each of the two elbow pipes and both ends of the connecting pipe. The connecting pipe and the elbow pipes are connected through the flanges. A limiting ring is fixedly connected to the inner circumferential wall of the connecting pipe. An adjusting ring is slidably connected inside the circumference of the connecting pipe. A spring is fixedly connected to one side of the adjusting ring, and the other end of the spring is fixedly connected to a first plug. The first plug is inserted into the limiting ring. When the impact force generated instantaneously is relatively large, the water with impact force enters the connecting pipe through the elbow pipe and flushes open the first plug, thereby discharging the water to the other side of the valve body, reducing the impact force, and further improving the service life of the product. An adjusting assembly for adjusting the force of the first plug is provided inside the connecting pipe.

[0020] Further, the adjusting assembly includes a first threaded rod. The first threaded rod rotatably penetrates through one of the elbow pipes. A top ring is threadedly connected to the circumference of the first threaded rod. A plurality of top rods are fixedly connected to one side of the top ring, and the other ends of the top rods are all fixed to the adjusting ring. The adjusting assembly can adjust the elastic force of the spring, thereby adapting to external pipes with different flow rates.

[0021] Further, at least one guide rod is fixedly connected to the inner circumferential wall of the connecting pipe. The adjusting ring is slidably connected to the guide rod, and the guide rod plays a guiding role for the adjusting ring.

[0022] Further, one end of both the first plug and the top ring is conical.

[0023] Further, a dust-proof net is fixedly connected to the inner wall of the top of the air pipe.

[0024] The embodiments of the present invention have the following beneficial effects:

[0025] In the present invention, through the setting of installing a speed control mechanism on one side of the valve stem, when the valve stem rotates, the push ring can be driven to rotate through the mounting plate, and then the moving speed of the push ring can be controlled by the flow rate of the hydraulic oil in the oil pipe, thereby restricting the rotation speed of the valve stem, avoiding the valve stem driving the valve core to rotate too fast, reducing the impact force generated by the water hammer effect, and improving the service life of the product.

[0026] In the present invention, through the combined use of the second threaded rod and the second plug, when the second threaded rod is rotated, the second plug can be driven to move, thereby changing the flow diameter in the discharge pipe, and further changing the rotation speed of the valve stem, improving the flexibility of product use.

[0027] In the present invention, by installing a shock reduction mechanism on both sides of the valve body, when the spool closes and the instantaneous impact force is large, the water with the impact force enters the connecting pipe through the elbow pipe, and the first plug is pushed open, so that the water is discharged to the other side of the valve body, reducing the impact force and further improving the service life of the product.

[0028] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 3D structural schematic diagram of an embodiment of the present invention;

[0031] Figure 2 Cross-sectional structural schematic diagram of an embodiment of the present invention;

[0032] Figure 3 Cross-sectional structural schematic diagram of the shock reduction mechanism of an embodiment of the present invention;

[0033] Figure 4 Structural schematic diagram of the speed control mechanism of an embodiment of the present invention;

[0034] Figure 5 Cross-sectional structural schematic diagram of the speed control mechanism of an embodiment of the present invention.

[0035] In the figure: 1. Valve body; 2. Shock reduction mechanism; 3. Speed control mechanism; 4. Spool; 5. Valve stem; 6. Elbow pipe; 7. Connecting pipe; 8. Flange; 9. Limiting ring; 10. Guide rod; 11. Adjusting ring; 12. Spring; 13. First plug; 14. Thrust rod; 15. Thrust ring; 16. First threaded rod; 17. Mounting plate; 18. Pushing ring; 19. Oil pipe; 20. Extension pipe; 21. Discharge pipe; 22. Collection tank; 23. Air pipe; 24. Adjusting assembly; 25. Piston; 26. Second plug; 27. Second threaded rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "open hole", "upper", "middle", "length", "inner", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted in the present invention.

[0039] Embodiment 1

[0040] Please refer to Figures 1 - 5 As shown, in this embodiment, a processing technology for a ball valve is provided, including: S1: Raw material cutting, cutting a rod-shaped steel bar into a disc state according to process requirements;

[0041] S2: Disc open hole, opening an installation hole for installation on the cut disc, and then switching different tools to cut out the contour of the valve on the disc;

[0042] S3: Semi-finished product grinding, using a grinding machine to grind the periphery of the raw material with a contour to precise dimensions;

[0043] S4: Raw material grinding, placing the raw material with the surface ground in a grinding machine with ceramic stones, and using the ceramic stones to grind the ground raw material;

[0044] S5: Component welding, welding and fixing the processed components together through a welding process;

[0045] S6: Weld point treatment, first cleaning the welded components with clean water after welding, then pickling the weld seam with a pickling and passivation solution, and finally putting them into an ultrasonic cleaning machine for cleaning;

[0046] S7: Component assembly, assembling and fixing the cleaned raw materials according to the installation steps;

[0047] S8: Finished product inspection, testing the sealing performance of the assembled ball valve through a valve airtightness tester.

[0048] A ball valve includes a valve body 1, a valve core 4 is arranged inside the valve body 1, a valve stem 5 is fixedly connected to the top of the valve core 4, and a speed control mechanism 3 is arranged on the top of the valve body 1;

[0049] Refer to Figure 4 and Figure 5, the speed control mechanism 3 includes a mounting plate 17 which is fixedly connected to the circumference of the valve stem 5. One side of the mounting plate 17 is fixedly connected with an arc-shaped push ring 18, and the other end of the push ring 18 is fixedly connected with a piston 25. The top of the valve body 1 is fixedly connected with an oil pipe 19 which is used in cooperation with the push ring 18. The piston 25 is slidably connected in the oil pipe 19. The other end of the oil pipe 19 is fixedly communicated with an extension pipe 20. The circumference of the extension pipe 20 is fixedly communicated with a discharge pipe 21. The top of the discharge pipe 21 is fixedly connected with a collection tank 22. The collection tank 22 is filled with hydraulic oil. The top of the collection tank 22 is fixedly connected with an air pipe 23. The opening of the air pipe 23 faces upward. The air pipe 23 is used for exhausting air and upward to prevent hydraulic oil from leaking. The inner wall of the top of the air pipe 23 is fixedly connected with a dust-proof net which prevents foreign objects from entering the air pipe 23. The hydraulic oil is restricted by the diameter of the pipeline, so that when the push ring 18 moves, the moving speed is restricted, thereby avoiding the valve stem 5 from rotating too fast and reducing the impact on the valve core 4 when it is closed. One end of the extension pipe 20 is provided with an adjustment component 24 for controlling the flow rate;

[0050] Two shock reduction mechanisms 2 are respectively located on both sides of the valve body 1 to reduce the water hammer reaction shock.

[0051] Embodiment III

[0052] Based on Embodiment I, the improvement is as follows: Refer to the appendix Figures 1 - 5 , a processing technology of a ball valve, including the following steps:

[0053] S1: Raw material cutting, cutting the rod-shaped steel bar into a disc state according to the process requirements;

[0054] S2: Disc hole opening, opening the installation holes for installation on the cut disc, and then switching different tools to cut out the contour of the valve on the disc;

[0055] S3: Semi-finished product grinding, using a grinding machine to grind the periphery of the raw material with a contour to an accurate size;

[0056] S4: Raw material grinding, putting the raw material with the surface ground into a grinding machine with ceramic stones, and using the ceramic stones to grind the ground raw material;

[0057] S5: Component welding, welding and fixing the processed components together through the welding process;

[0058] S6: Weld point treatment, first cleaning the welded components with clean water, then pickling the weld seam with pickling and passivation solution, and finally putting them into an ultrasonic cleaning machine for cleaning;

[0059] S7: Component assembly, assembling and fixing the cleaned raw materials according to the installation steps;

[0060] S8: Final product inspection. For the assembled ball valve, its sealing performance is tested by a valve airtightness tester.

[0061] A ball valve includes a valve body 1. A valve core 4 is arranged inside the valve body 1. The top of the valve core 4 is fixedly connected with a valve rod 5. A speed control mechanism 3 is arranged at the top of the valve body 1;

[0062] Refer to Figure 4 and Figure 5 , the speed control mechanism 3 includes a mounting plate 17. The mounting plate 17 is fixedly connected to the circumference of the valve rod 5. One side of the mounting plate 17 is fixedly connected with an arc-shaped push ring 18. The other end of the push ring 18 is fixedly connected with a piston 25. The top of the valve body 1 is fixedly connected with an oil pipe 19 which is used in cooperation with the push ring 18. The piston 25 is slidably connected inside the oil pipe 19. The other end of the oil pipe 19 is fixedly communicated with an extension pipe 20. The circumference of the extension pipe 20 is fixedly communicated with a discharge pipe 21. The top of the discharge pipe 21 is fixedly connected with a collection tank 22. Hydraulic oil is arranged inside the collection tank 22. The top of the collection tank 22 is fixedly connected with an air pipe 23. The opening of the air pipe 23 faces upward. The air pipe 23 is used for exhausting air and faces upward to prevent the leakage of hydraulic oil. A dust-proof net is fixedly connected to the inner wall of the top of the air pipe 23. The dust-proof net prevents foreign objects from entering the air pipe 23. The hydraulic oil is restricted by the diameter of the pipeline, so that when the push ring 18 moves, its moving speed is restricted, thereby avoiding the valve rod 5 from rotating too fast and reducing the impact on the valve core 4 when it is closed. One end of the extension pipe 20 is provided with an adjusting component 24 for controlling the flow rate;

[0063] Two shock reduction mechanisms 2 are respectively arranged on both sides of the valve body 1 to reduce the water hammer reaction impact.

[0064] Refer to Figure 5 , the adjusting component 24 includes a second threaded rod 27. The second threaded rod 27 is threadedly connected to one end of the extension pipe 20. One end of the second threaded rod 27 is fixedly connected with a nut for facilitating the rotation of the second threaded rod 27. The other end of the second threaded rod 27 is rotatably connected with a second plug 26. The second plug 26 is slidably connected with the extension pipe 20 and is located below the discharge pipe 21. When the second threaded rod 27 is moved, the second threaded rod 27 drives the second plug 26 to move. The second plug 26 changes the flow diameter at the bottom of the discharge pipe 21, thereby achieving the purpose of controlling the moving speed of the push ring 18 and adapting to external pipelines with different flow rates.

[0065] Refer to Figure 2 and Figure 3, the impact reduction mechanism 2 includes two bent pipes 6 and a connecting pipe 7. Both of the two bent pipes 6 are fixedly connected to the circumference of the valve body 1 and communicate with the valve body 1. The two bent pipes 6 are respectively arranged on both sides of the valve core 4. Flanges 8 are fixedly connected to one ends of the two bent pipes 6 and both ends of the connecting pipe 7. The connecting pipe 7 and the bent pipes 6 are connected through the flanges 8. A limiting ring 9 is fixedly connected to the inner circumferential wall of the connecting pipe 7. An adjusting ring 11 is slidably connected to the inner circumference of the connecting pipe 7. One side of the adjusting ring 11 is fixedly connected with a spring 12. The other end of the spring 12 is fixedly connected with a first plug 13. The first plug 13 is inserted into the limiting ring 9. When the valve core 4 is closed, the impact force generated instantaneously enters the connecting pipe 7 through the bent pipe 6, then the first plug 13 is pushed open, and then the water flow enters the other side of the valve body 1 through the connecting pipe 7 and the other bent pipe 6, reducing the impact force of the water flow on the valve core 4. One ends of both the first plug 13 and the top ring 15 are conical, and the conical setting facilitates the flow of the liquid. An adjusting component for adjusting the force of the first plug 13 is provided in the connecting pipe 7.

[0066] Refer to Figure 3 , the adjusting component includes a first threaded rod 16. The first threaded rod 16 rotatably penetrates through one of the bent pipes 6. A top ring 15 is threadedly connected to the circumference of the first threaded rod 16. A plurality of top rods 14 are fixedly connected to one side of the top ring 15. The other ends of the top rods 14 are all fixed to the adjusting ring 11. By rotating the first threaded rod 16, the first threaded rod 16 drives the top ring 15 to move, thereby pushing the adjusting ring 11 to move, so as to change the elastic force of the spring 12, and then adapt to external pipes with different flow rates. At least one guiding rod 10 is fixedly connected to the inner circumferential wall of the connecting pipe 7. The adjusting ring 11 is slidably connected to the guiding rod 10, and the guiding rod 10 plays a role in guiding the adjusting ring 11.

[0067] The usage process and working principle of the technical solution of the present invention are as follows:

[0068] During use, the valve body 1 is connected to an external pipe. By rotating the valve rod 5, the valve core 4 is driven to rotate, thereby controlling the flow of the valve body 1. When closing the valve body 1, the valve rod 5 is also rotated. The valve rod 5 drives the valve core 4 to rotate. While the valve rod 5 rotates, the push ring 18 is driven to rotate in the oil pipe 19 through the mounting plate 17. The piston 25 on the push ring 18 pushes the hydraulic oil in the oil pipe 19. The hydraulic oil enters the collection tank 22 through the extension pipe 20 and the discharge pipe 21. Since the hydraulic oil is restricted by the pipe diameter in the pipeline, the moving speed of the push ring 18 is restricted, thereby avoiding the valve rod 5 from rotating too fast and reducing the impact on the valve core 4 when closing. When rotating the second threaded rod 27, the second threaded rod 27 drives the second plug 26 to move, and the second plug 26 changes the flow diameter at the bottom of the discharge pipe 21, so as to achieve the purpose of controlling the moving speed of the push ring 18 and adapting to external pipes with different flow rates;

[0069] When the second plug 26 is adjusted incorrectly, the valve core 4 is closed, and the impact force generated instantaneously enters the connecting pipe 7 through the elbow pipe 6, then the first plug 13 is flushed open, and then the water flow enters the other side of the valve body 1 through the connecting pipe 7 and another elbow pipe 6, reducing the impact force of the water flow on the valve core 4. After the impact, the first plug 13 resets and continues to block the connecting pipe 7. Rotate the first threaded rod 16, the first threaded rod 16 drives the top ring 15 to move, thereby pushing the adjusting ring 11 to move, so as to change the elastic force of the spring 12, and then adapt to external pipes with different flow rates.

[0070] It should be noted that in the description of this specification, the descriptions such as "first", "second", etc. are only used to distinguish each feature, and have no actual order or directional meaning, and the present application is not limited thereto.

[0071] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art in the technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A ball valve, characterized in that, It includes a valve body (1), a valve core (4) is arranged inside the valve body (1), the top of the valve core (4) is fixedly connected with a valve rod (5), and a speed control mechanism (3) is arranged at the top of the valve body (1); The speed control mechanism (3) includes a mounting plate (17), the mounting plate (17) is fixedly connected to the circumference of the valve rod (5), an arc-shaped push ring (18) is fixedly connected to one side of the mounting plate (17), the other end of the push ring (18) is fixedly connected with a piston (25), a fuel pipe (19) which is used in cooperation with the push ring (18) is fixedly connected to the top of the valve body (1), the piston (25) is slidably connected inside the fuel pipe (19), the other end of the fuel pipe (19) is fixedly communicated with an extension pipe (20), a discharge pipe (21) is fixedly communicated with the circumference of the extension pipe (20), a collection tank (22) is fixedly connected to the top of the discharge pipe (21), hydraulic oil is arranged inside the collection tank (22), an air pipe (23) is fixedly connected to the top of the collection tank (22), the opening of the air pipe (23) faces upward, and an adjusting component (24) for controlling the flow rate is arranged at one end of the extension pipe (20); Two shock reduction mechanisms (2), the two shock reduction mechanisms (2) are respectively located on both sides of the valve body (1) to reduce the water hammer reaction shock; The processing technology of the ball valve includes the following steps: S1: Raw material cutting, cutting the rod-shaped steel bar into a disc state according to the process requirements; S2: Disc hole opening, opening the installation holes for installation on the cut disc, and then switching different tools to cut out the outline of the valve on the disc; S3: Semi-finished product grinding, using a grinding machine to grind the periphery of the raw material with a contour to an accurate size; S4: Raw material grinding, putting the raw material with the surface ground into a grinding machine with ceramic stones, and using the ceramic stones to grind the ground raw material; S5: Component welding, welding and fixing the processed components together through the welding process; S6: Weld point treatment, first cleaning the welded components with clean water, then pickling the weld seam with pickling and passivation solution, and finally putting them into an ultrasonic cleaning machine for cleaning; S7: Component assembly, assembling and fixing the cleaned raw materials according to the installation steps; S8: Finished product inspection, testing the sealing performance of the assembled ball valve through a valve airtightness tester.

2. A ball valve according to claim 1, characterized in that, The adjusting component (24) includes a second threaded rod (27), the second threaded rod (27) is threadedly connected to one end of the extension pipe (20), the other end of the second threaded rod (27) is rotatably connected with a second plug (26), and the second plug (26) is slidably connected to the extension pipe (20) and is located below the discharge pipe (21).

3. A ball valve according to claim 1, characterized in that, The impact reduction mechanism (2) includes two elbow pipes (6) and a connecting pipe (7). Both of the two elbow pipes (6) are fixedly connected to the circumference of the valve body (1) and communicate with the valve body (1). The two elbow pipes (6) are respectively arranged on both sides of the valve core (4). Flanges (8) are fixedly connected to one ends of the two elbow pipes (6) and both ends of the connecting pipe (7). The connecting pipe (7) and the elbow pipes (6) are connected through the flanges (8). A limiting ring (9) is fixedly connected to the inner circumferential wall of the connecting pipe (7). An adjusting ring (11) is slidably connected to the inside of the circumference of the connecting pipe (7). A spring (12) is fixedly connected to one side of the adjusting ring (11). The other end of the spring (12) is fixedly connected to a first plug (13). The first plug (13) is inserted into the limiting ring (9). An adjusting assembly for adjusting the force of the first plug (13) is arranged in the connecting pipe (7).

4. A ball valve according to claim 3, characterized in that, The adjusting assembly includes a first threaded rod (16). The first threaded rod (16) rotatably penetrates through one of the elbow pipes (6). A top ring (15) is threadedly connected to the circumference of the first threaded rod (16). A plurality of top rods (14) are fixedly connected to one side of the top ring (15). The other ends of the top rods (14) are all fixed to the adjusting ring (11).

5. A ball valve according to claim 3, characterized in that, At least one guide rod (10) is fixedly connected to the inner circumferential wall of the connecting pipe (7). The adjusting ring (11) is slidably connected to the guide rod (10).

6. A ball valve according to claim 4, characterized in that, One ends of the first plug (13) and the top ring (15) are both conical.

7. A ball valve according to claim 1, wherein, A dust-proof net is fixedly connected to the inner wall of the top of the air pipe (23).

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