High sealing water, electricity and left and right ball valve

Abstract

The application belongs to the technical field of ball valves, and particularly relates to a high-sealing water and electricity left and right ball valve, which comprises a valve body, a valve core arranged in the valve body, and a valve rod connected to the side wall of the valve core, wherein the valve core and the valve body are rotationally connected, the valve rod is arranged to extend out of the valve body from the end of the valve core, and a driving arm is fixedly connected to the end of the valve rod away from the valve core; an opening and closing hydraulic cylinder is arranged below the valve body. When the water and electricity left and right ball valve is rapidly closed, the pipe diameter at the liquid inlet end of the ball valve can be expanded, so that the medium flow rate at the liquid inlet end of the ball valve is reduced, the impact force generated instantaneously when the valve core is closed is reduced, the pressure borne by the sealing surface of the ball valve is reduced, the sealing reliability of the ball valve is improved, and when the water and electricity left and right ball valve is closed, air can be automatically supplied to the pipeline behind the ball valve, the pressure in the air balance pipeline is timely supplemented, so that the purpose of eliminating negative pressure and inhibiting cavitation and air erosion is achieved, and the damage of water hammer impact to the pipeline and valve parts is reduced.

Description

Technical Field

[0001] This invention belongs to the field of ball valve technology, and in particular relates to a high-sealing water-electric left and right ball valve. Background Technology

[0002] The left and right ball valves are core components of the turbine intake system in hydropower stations. They are typically installed between the pressure steel pipe and the turbine casing, and are widely adaptable to various high, medium, and low head hydropower station operating conditions. Their primary function is to control water flow and ensure safety. During normal operation of the hydropower plant, these ball valves can smoothly conduct or cut off water flow during normal start-up and shutdown. Simultaneously, during unit maintenance or shutdown due to malfunction, they can completely cut off the water flow, providing a safe, waterless working environment for equipment maintenance. Furthermore, they can quickly respond to emergencies such as sudden unit abnormalities or overspeed loss of control. Quickly shut off the flow to avoid safety accidents such as equipment damage and pipeline rupture caused by continuous water flow impact. Currently, conventional left and right ball valves for hydropower generally have problems with insufficient sealing performance and poor opening and closing stability. When subjected to high-pressure water flow, water vapor corrosion and unit vibration for a long time, they are prone to failures such as valve core leakage, seal wear and incomplete closure. This not only increases the operation and maintenance cost of hydropower stations and reduces the operating efficiency of units, but also significantly weakens the operational safety and stability of hydropower pipeline systems, making it difficult to adapt to the harsh hydropower operating conditions of high pressure, large flow and long-term continuous operation.

[0003] During the closing operation of existing water and electricity left and right ball valves, the valve core gradually rotates and closes, and the water flow channel inside the valve body gradually narrows. According to the principles of fluid mechanics, under the condition of constant water pressure and continuous water flow input in the pipeline, the narrowing water flow channel will cause the water flow velocity in the pipeline to increase instantaneously, forming a high-speed jet state. The high-speed water flow will continuously scour the valve core, valve seat and pipeline inner wall. Long-term high-frequency scouring will cause wear, cavitation and cavitation damage to the internal structure of the valve body, destroying the valve sealing structure. In addition, the instantaneous acceleration of the water flow will cause pressure fluctuations inside the pipeline, generating a severe water hammer effect, causing vibration of the pipeline, valve body and connecting parts, leading to problems such as pipeline loosening, valve body deformation and sealing failure.

[0004] To address this issue, a high-sealing-performance water-electric left and right ball valve is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a high-sealing water-electric left and right ball valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-sealing water-electric left and right ball valve, comprising a valve body, a valve core disposed within the valve body, the valve core and the valve body being rotatably connected, a valve stem connected to the side wall of the valve core, the end of the valve stem away from the valve core extending out of the valve body and fixedly connected to a drive arm, an opening and closing hydraulic cylinder disposed below the valve body, a connecting frame fixedly connected to the moving end of the opening and closing hydraulic cylinder, the connecting frame and the drive arm being hinged, and further comprising: A variable diameter assembly is installed at the inlet of the valve body. During the rotation and closing of the valve core, it can change the pipe diameter and reduce the liquid flow rate in the pipe. The drain pipe is connected to the outlet of the valve body. A connecting component is provided on the upper wall of the drain pipe. An air supply component is provided on the side of the connecting component inside the drain pipe to maintain the pressure balance inside the drain pipe and suppress cavitation and cavitation phenomena. An adjustment component is installed on the wall of the drain pipe and is connected to the air supply component through a connecting component, which can adjust the air intake of the air supply component.

[0007] Preferably, the variable diameter assembly includes an inlet pipe, which is fixedly connected to the inlet of the valve body via a flange connector. A variable diameter cylinder is fixedly connected to the end of the inlet pipe away from the valve body. A water inlet pipe is fixedly connected to the end of the variable diameter cylinder away from the inlet pipe. Multiple hydraulic cylinders are circumferentially distributed on the inner wall of the variable diameter cylinder, and hydraulic rods are inserted into the hydraulic cylinders. Multiple annular conductive pipes are fixedly sleeved on the outer wall of the variable diameter cylinder. The annular conductive pipes are connected to an external hydraulic system. The annular conductive pipes and hydraulic cylinders are connected via short pipes. A variable diameter plate is fixedly connected to the end of the hydraulic rod extending out of the hydraulic cylinder. A groove is formed on one side of the variable diameter plate. A protruding plate matching the groove is fixedly connected to the side wall of the variable diameter plate away from the groove. A rubber tube located inside the variable diameter plate is connected to the inner wall of the variable diameter cylinder.

[0008] Preferably, the connecting assembly includes an arc-shaped connecting plate disposed on the upper side wall of the drain pipe, a connecting seat fixedly connected to the inner wall of the arc-shaped connecting plate, an opening in the wall of the drain pipe that matches the connecting seat, a plurality of receiving cavities being formed on the lower side wall of the connecting seat, connecting pipes being inserted into the side walls of the receiving cavities, and the upper ends of the plurality of connecting pipes passing through the arc-shaped connecting plate and being fixedly connected to the same arc-shaped pipe.

[0009] Preferably, the air supply component includes an exhaust head disposed in the receiving cavity, an exhaust port being provided on the side wall of the exhaust head, a rubber pad that fits against the exhaust port being fixedly connected to the inner wall of the receiving cavity, the lower end of the exhaust head extending out of the receiving cavity and being fixedly connected to an arc-shaped rubber baffle, two springs being fixedly connected between the exhaust head and the receiving cavity, and the same first telescopic pipe being fixedly connected between the exhaust head and the connecting pipe.

[0010] Preferably, a limiting rod is fixedly connected to the inner wall of the receiving cavity, a limiting plate is fixedly connected to the lower end of the limiting rod, a limiting ring is slidably provided on the outside of the limiting rod, and the limiting ring and the exhaust head are fixedly connected by the same bent rod.

[0011] Preferably, the adjusting assembly includes a mounting base fixedly connected to the outer wall of the drain pipe. An adjusting cylinder is fixedly connected to the upper side wall of the mounting base. A threaded cylinder is threadedly connected to the side wall of the adjusting cylinder. A threaded pin is threadedly connected to the inner wall of the threaded cylinder. A movable plate is fixedly connected to one end of the threaded pin extending out of the threaded cylinder. A piston rod is connected to the end of the movable plate away from the threaded pin via a tension spring. A connecting cavity is formed on the side wall of the piston rod. An air inlet is formed in the cavity wall of the connecting cavity. An air inlet is formed on the side wall of the adjusting cylinder. A second telescopic pipe communicating with the connecting cavity is connected to the side wall of the piston rod. A horizontal pipe is connected to the end of the second telescopic pipe away from the piston rod. A fixed pipe is connected to the end of the horizontal pipe away from the second telescopic pipe via a flange connector. The end of the fixed pipe away from the second telescopic pipe is connected to an arc-shaped pipe.

[0012] Preferably, a marking plate is fixedly connected to the upper side wall of the movable plate, a sliding opening matching the marking plate is opened on the upper side wall of the adjusting cylinder, and a scale mark matching the marking plate is opened on the side wall of the adjusting cylinder.

[0013] Preferably, a locking plate is fixedly connected to the side wall of the adjusting cylinder, and a positioning bolt is threadedly connected to the side wall of the locking plate.

[0014] Compared with existing technologies, the advantages of a high-sealing water-electric left and right ball valve are: 1. By using the variable diameter component, when the ball valve of the hydropower plant closes quickly, the pipe diameter at the inlet end of the ball valve can be increased, thereby reducing the medium flow rate at the inlet end of the ball valve and the instantaneous impact force generated when the valve core closes, reducing the pressure on the ball valve sealing surface, and improving the sealing reliability of the ball valve.

[0015] 2. By setting up an air replenishment component, when the ball valve of the hydropower plant is closed, air can be automatically replenished to the pipeline behind the ball valve, and the pressure in the air balance pipe can be replenished in time, thereby eliminating negative pressure and inhibiting cavitation cavitation. At the same time, it reduces the damage of water hammer impact to pipelines and valves.

[0016] 3. By setting adjustment components and air supply components, the air intake can be adjusted according to the characteristics of different ball valves when opening and closing and the needs of pipeline air pressure balance, so as to match the negative pressure in the pipe. This avoids the problem of insufficient air intake causing the negative pressure to be eliminated in time, and also prevents excessive air intake from causing water flow disturbance and pressure fluctuation in the pipe. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of a high-sealing water-electric left and right ball valve provided by the present invention; Figure 2 This is a schematic diagram showing the position of the valve core in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 3 This is a schematic diagram of the internal structure of the variable diameter cylinder in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 4 This is a schematic diagram of the connecting assembly in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 5 This is a schematic diagram of the internal structure of the connecting seat in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 6 This is a schematic diagram of the air supply component in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 7 This is a schematic diagram showing the positional relationship of multiple variable diameter plates in a high-sealing water-electric left and right ball valve provided by the present invention; Figure 8 This is a schematic diagram of the internal structure of the regulating cylinder in a high-sealing water-electric left and right ball valve provided by the present invention.

[0018] In the diagram: 1 Valve body, 2 Valve core, 3 Drive arm, 4 Opening / closing hydraulic cylinder, 5 Connecting frame, 6 Drain pipe, 7 Variable diameter assembly, 71 Inlet pipe, 72 Variable diameter cylinder, 8 Water inlet pipe, 9 Hydraulic cylinder, 10 Hydraulic rod, 11 Annular transmission pipe, 12 Variable diameter plate, 13 Groove, 14 Protruding plate, 15 Connecting assembly, 151 Arc-shaped connecting plate, 152 Connecting seat, 16 Receiving cavity, 17 Connecting pipe, 18 Arc-shaped pipe, 19 Air supply assembly, 191 Exhaust head, 192 Exhaust port. 20 Rubber pad, 21 Arc-shaped rubber baffle, 22 First telescopic tube, 23 Limiting rod, 24 Limiting plate, 25 Limiting ring, 26 Bend rod, 27 Adjusting assembly, 271 Mounting base, 272 Adjusting cylinder, 28 Threaded cylinder, 29 Threaded pin, 30 Moving plate, 31 Piston column, 32 Connecting cavity, 33 Air intake channel, 34 Air intake port, 35 Second telescopic tube, 36 Horizontal tube, 37 Fixed tube, 38 Marking plate, 39 Locking plate, 40 Positioning bolt, 41 Rubber tube. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-8As shown, a high-sealing water-electric left and right ball valve includes a valve body 1, a valve core 2 inside the valve body 1, the valve core 2 and the valve body 1 being rotatably connected, a valve stem connected to the side wall of the valve core 2, the end of the valve stem away from the valve core 2 extending out of the valve body 1 and fixedly connected to a drive arm 3, an opening and closing hydraulic cylinder 4 located below the valve body 1, a connecting frame 5 fixedly connected to the moving end of the opening and closing hydraulic cylinder 4, the connecting frame 5 and the drive arm 3 being hinged, and also includes: A reducing assembly 7 is located at the inlet of the valve body 1. The reducing assembly 7 includes an inlet pipe 71, which is fixedly connected to the inlet of the valve body 1 via a flange connection. A reducing cylinder 72 is fixedly connected to the end of the inlet pipe 71 away from the valve body 1. A water inlet pipe 8 is fixedly connected to the end of the reducing cylinder 72 away from the inlet pipe 71. Multiple hydraulic cylinders 9 are arranged annularly on the inner wall of the reducing cylinder 72, and hydraulic rods 10 are inserted into the hydraulic cylinders 9. Multiple annular transmission pipes 11 are fixedly sleeved on the outer wall of the reducing cylinder 72, and these annular transmission pipes 11 are connected to an external hydraulic system. This hydraulic system controls the opening and closing of the ball valve. The hydraulic system used in the hydraulic cylinder 4 is a single set, requiring only the addition of a synchronous control oil circuit, without the need for a new independent control system. The annular transmission pipe 11 and the hydraulic cylinder 9 are connected through a short pipe. The end of the hydraulic rod 10 extending out of the hydraulic cylinder 9 is fixedly connected to a variable diameter plate 12. A groove 13 is provided on one side of the variable diameter plate 12. A protruding plate 14 matching the groove 13 is fixedly connected to the side wall of the variable diameter plate 12 away from the groove 13. A rubber tube 41 located inside the variable diameter plate 12 is connected to the inner wall of the variable diameter cylinder 72. During the rotation and closing process of the valve core 2, the pipe diameter in the pipe can be changed, reducing the liquid flow rate in the pipe. The drain pipe 6 is connected to the outlet of the valve body 1. A connecting assembly 15 is provided on the upper wall of the drain pipe 6. The connecting assembly 15 includes an arc-shaped connecting plate 151 on the upper wall of the drain pipe 6. A connecting seat 152 is fixedly connected to the inner wall of the arc-shaped connecting plate 151. The drain pipe 6 has a placement opening that matches the connecting seat 152. The lower wall of the connecting seat 152 has multiple receiving cavities 16. Connecting pipes 17 are inserted into the side walls of the receiving cavities 16. The upper ends of the multiple connecting pipes 17 all pass through the arc-shaped connecting plate 151 and are fixedly connected to the same arc-shaped pipe 18. An air supply assembly 19 is provided on one side of the connecting assembly 15 inside the drain pipe 6. The air supply assembly 19 includes an exhaust head 191 installed in the receiving cavity 16. A limiting rod 23 is fixedly connected to the inner wall of the receiving cavity 16. A limiting plate 24 is fixedly connected to the lower end of the limiting rod 23. A limiting ring 25 is slidably provided on the outside of the limiting rod 23. The limiting ring 25 and the exhaust head 191 are fixedly connected by the same bent rod 26. An exhaust port 192 is opened on the side wall of the exhaust head 191. A rubber pad 20 that fits with the exhaust port 192 is fixedly connected to the inner wall of the receiving cavity 16. The lower end of the exhaust head 191 extends out of the receiving cavity 16 and is fixedly connected by an arc-shaped rubber baffle 21. Two springs are fixedly connected between the exhaust head 191 and the receiving cavity 16. The exhaust head 191 and the connecting pipe 17 are fixedly connected by the same first telescopic pipe 22, which can maintain the pressure balance in the drain pipe 6 and suppress cavitation and cavitation phenomena. Adjustment component 27 is disposed on the wall of drain pipe 6 and is connected to air supply component 19 via connection component 15. Adjustment component 27 includes mounting base 271 fixedly connected to the outer wall of drain pipe 6. Adjustment cylinder 272 is fixedly connected to the upper side wall of mounting base 271. Threaded cylinder 28 is threadedly connected to the side wall of adjustment cylinder 272. Threaded pin 29 is threadedly connected to the inner thread of threaded cylinder 28. A movable plate 30 is fixedly connected to one end of threaded pin 29 extending out of threaded cylinder 28. A piston rod 31 is connected to the end of movable plate 30 away from threaded pin 29 via a tension spring. The piston rod 31 has a connecting cavity 32 on its side wall, and an air inlet channel 33 is provided in the cavity wall of the connecting cavity 32. The regulating cylinder 272 has an air inlet 34 on its side wall. The piston rod 31 has a second telescopic tube 35 connected to the connecting cavity 32 on its side wall. The end of the second telescopic tube 35 away from the piston rod 31 is connected to a horizontal tube 36. The end of the horizontal tube 36 away from the second telescopic tube 35 is connected to a fixed tube 37 through a flange connector. The end of the fixed tube 37 away from the second telescopic tube 35 is connected to an arc-shaped tube 18, which can adjust the air intake of the air supply component 19.

[0021] A marking plate 38 is fixedly connected to the upper side wall of the movable plate 30. A sliding port matching the marking plate 38 is opened on the upper side wall of the adjusting cylinder 272. A scale matching the marking plate 38 is opened on the side wall of the adjusting cylinder 272. A locking plate 39 is fixedly connected to the side wall of the adjusting cylinder 272. A positioning bolt 40 is threadedly connected to the side wall of the locking plate 39.

[0022] The operating principle of this invention is explained as follows: When the ball valve needs to be closed, the operator sends an electrical signal to the external controller through an external switch. After receiving the electrical signal, the controller controls the opening and closing hydraulic cylinder 4 to work. The opening and closing hydraulic cylinder 4 drives the drive arm 3 and valve stem to rotate through the connecting frame 5, thereby driving the valve core 2 to rotate and close. At the same time, the controller controls the external hydraulic system to extract the hydraulic oil inside the hydraulic cylinder 9, causing the hydraulic rod 10 to retract into the hydraulic cylinder 9. Multiple hydraulic rods 10 will drive multiple variable diameter plates 12 to expand outward. Since the water pressure inside the inlet pipe 8 and the rubber tube 41 is relatively large, without the restraint of the variable diameter plates 12, the variable diameter plates 12 will expand outward under the hydraulic action, thereby increasing the water flow channel inside the variable diameter cylinder 72 and increasing the flow cross-sectional area. Since the flow rate inside the pipe is constant, the flow cross-sectional area is inversely proportional to the flow velocity, thereby reducing the liquid flow velocity, effectively reducing the liquid flow velocity when the valve core 2 closes, reducing the instantaneous impact force generated when the valve core 2 closes, reducing the pressure on the ball valve sealing surface, and improving the sealing reliability of the ball valve. When valve core 2 is closed, the water flow behind valve core 2 continues due to inertia, creating a negative pressure in drain pipe 6. Under the action of the pressure difference, multiple exhaust heads 191 move towards the drain pipe 6, causing them to extend from the receiving cavity 16. The greater the negative pressure in drain pipe 6, the longer the exhaust heads 191 extend from the receiving cavity 16 under the pressure difference. Since the exhaust heads 191 are connected to the connecting pipe 17 via the first telescopic pipe 22, and the upper end of the first telescopic pipe 22 is fixed and limited by the connecting pipe 17, the exhaust heads 191 will pull the lower end of the first telescopic pipe 22 downward under the pressure difference. The exhaust heads 191 will then drive the exhaust port 192 to extend. The gas exits the receiving cavity 16 and separates from the rubber pad 20. Based on this principle, the piston column 31 located in the adjusting cylinder 272 will overcome the tension of the tension spring and move towards the horizontal tube 36 until the piston column 31 drives the air intake channel 33 and the air intake port 34 to align. The external gas will be transported to the arc-shaped tube 18 through the air intake channel 33, the air intake port 34, the second telescopic tube 35, the horizontal tube 36, and the fixed tube 37. The gas will then be transported to multiple connecting tubes 17 through the arc-shaped tube 18. The gas will then be transported to the exhaust head 191 through the connecting tube 17 and the first telescopic tube 22, and then discharged through the exhaust port 192, thereby balancing the pressure in the drain pipe 6 and achieving the purpose of eliminating negative pressure and suppressing cavitation cavitation. When the operator adjusts the air intake according to the characteristics of different ball valves when opening and closing and the air pressure balance requirement of the drain pipe 6, the positioning bolt 40 can be rotated to release the limit on the threaded cylinder 28. Then the operator rotates the threaded cylinder 28. Through the threaded engagement, the threaded cylinder 28 will drive the threaded pin 29 to move. The threaded pin 29 will drive the moving plate 30 to move, thereby changing the tension of the tension spring on the piston cylinder 31 when the piston cylinder 31 is subjected to negative pressure.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-sealing water-electric left and right ball valve, comprising a valve body (1), wherein a valve core (2) is provided inside the valve body (1), characterized in that, The valve core (2) and valve body (1) are rotatably connected. A valve stem is connected to the side wall of the valve core (2). The end of the valve stem away from the valve core (2) extends out of the valve body (1) and is fixedly connected to a drive arm (3). An opening and closing hydraulic cylinder (4) is provided below the valve body (1). A connecting frame (5) is fixedly connected to the moving end of the opening and closing hydraulic cylinder (4). The connecting frame (5) and the drive arm (3) are hinged together. The valve body (1) also includes: A variable diameter assembly (7) is provided at the inlet of the valve body (1); The drain pipe (6) is connected to the outlet of the valve body (1), and a connecting component (15) is provided on the upper side wall of the drain pipe (6). The regulating component (27) is disposed on the wall of the drain pipe (6) and is connected to the gas supply component (19) via the connecting component (15).

2. The high-sealing water-electric left and right ball valve according to claim 1, characterized in that, The variable diameter assembly (7) includes an inlet pipe (71), which is fixedly connected to the inlet of the valve body (1) via a flange connector. A variable diameter cylinder (72) is fixedly connected to one end of the inlet pipe (71) away from the valve body (1), and a water inlet pipe (8) is fixedly connected to one end of the variable diameter cylinder (72) away from the inlet pipe (71). Multiple hydraulic cylinders (9) are arranged annularly on the inner wall of the variable diameter cylinder (72), and hydraulic rods (10) are inserted into the hydraulic cylinders (9). Multiple annular conductive pipes are fixedly sleeved on the outer wall of the variable diameter cylinder (72). 11), the annular transmission pipe (11) is connected to the external hydraulic system, the annular transmission pipe (11) and the hydraulic cylinder (9) are connected through a short pipe, the end of the hydraulic rod (10) extending out of the hydraulic cylinder (9) is fixedly connected to a variable diameter plate (12), a groove (13) is provided on one side of the variable diameter plate (12), a protrusion (14) matching the groove (13) is fixedly connected to the side wall of the variable diameter plate (12) away from the groove (13), and a rubber tube (41) located inside the variable diameter plate (12) is connected to the inner wall of the variable diameter cylinder (72).

3. The high-sealing water-electric left and right ball valve according to claim 1, characterized in that, The connecting assembly (15) includes an arc-shaped connecting plate (151) disposed on the upper side wall of the drain pipe (6). A connecting seat (152) is fixedly connected to the inner wall of the arc-shaped connecting plate (151). The drain pipe (6) has a placement opening that matches the connecting seat (152). The lower side wall of the connecting seat (152) has multiple receiving cavities (16). A connecting pipe (17) is inserted into the side wall of the receiving cavity (16). The upper ends of the multiple connecting pipes (17) all pass through the arc-shaped connecting plate (151) and are fixedly connected to the same arc-shaped pipe (18). A gas replenishment assembly (19) is provided on one side of the connecting assembly (15) inside the drain pipe (6).

4. A high-sealing water-electric left and right ball valve according to claim 3, characterized in that, The air supply component (19) includes an exhaust head (191) disposed in the receiving cavity (16). The side wall of the exhaust head (191) is provided with an exhaust port (192). The inner wall of the receiving cavity (16) is fixedly connected with a rubber pad (20) that fits against the exhaust port (192). The lower end of the exhaust head (191) extends out of the receiving cavity (16) and is fixedly connected with an arc-shaped rubber baffle (21). Two springs are fixedly connected between the exhaust head (191) and the receiving cavity (16). The exhaust head (191) and the connecting pipe (17) are fixedly connected by the same first telescopic pipe (22).

5. A high-sealing water-electric left and right ball valve according to claim 4, characterized in that, The inner wall of the receiving cavity (16) is fixedly connected to a limiting rod (23), the lower end of the limiting rod (23) is fixedly connected to a limiting plate (24), a limiting ring (25) is slidably provided on the outside of the limiting rod (23), and the same bent rod (26) is fixedly connected between the limiting ring (25) and the exhaust head (191).

6. A high-sealing water-electric left and right ball valve according to claim 4, characterized in that, The adjusting assembly (27) includes a mounting base (271) fixedly connected to the outer wall of the drain pipe (6). An adjusting cylinder (272) is fixedly connected to the upper side wall of the mounting base (271). A threaded cylinder (28) is threadedly connected to the side wall of the adjusting cylinder (272). A threaded pin (29) is threadedly connected to the inner threaded cylinder (28). A movable plate (30) is fixedly connected to one end of the threaded pin (29) extending out of the threaded cylinder (28). A piston column (31) is connected to the end of the movable plate (30) away from the threaded pin (29) via a tension spring. The side wall of the piston column (31) has an opening. The connecting cavity (32) has an air inlet channel (33) on its wall and an air inlet (34) on its side wall. The piston column (31) has a second telescopic tube (35) connected to the connecting cavity (32) on its side wall. The end of the second telescopic tube (35) away from the piston column (31) is connected to a horizontal tube (36). The end of the horizontal tube (36) away from the second telescopic tube (35) is connected to a fixed tube (37) through a flange connector. The end of the fixed tube (37) away from the second telescopic tube (35) is connected to an arc-shaped tube (18).

7. A high-sealing water-electric left and right ball valve according to claim 6, characterized in that, The upper side wall of the movable plate (30) is fixedly connected to a marking plate (38), the upper side wall of the adjusting cylinder (272) is provided with a sliding opening that matches the marking plate (38), and the side wall of the adjusting cylinder (272) is provided with a scale that matches the marking plate (38).

8. A high-sealing water-electric left and right ball valve according to claim 6, characterized in that, The side wall of the adjusting cylinder (272) is fixedly connected to a locking plate (39), and the side wall of the locking plate (39) is threadedly connected to a positioning bolt (40).

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