Pneumatic high-temperature dustproof cut-off ball valve

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a pneumatic high-temperature dustproof cut-off ball valve which comprises a valve assembly, a valve body assembly, a valve seat assembly, an actuator assembly and a valve rod assembly. Gas passes through a pressure reducing valve and is connected into an electromagnetic valve through a pipeline, when the electromagnetic valve is powered on, a left path of the electromagnetic valve is connected to achieve reversing, the gas enters a left cavity of an air cylinder through the pipeline, a piston in the air cylinder starts to act, the piston of the air cylinder overcomes pretightening force of a spring through air pressure, and an output shaft drives a valve rod through an adapter shaft. When the electromagnetic valve loses power, the spring resets, the valve is closed, the valve achieves rapid opening and closing states through the execution device, O-shaped ring sealing between the valve rod and the stuffing box is omitted, the machining difficulty is greatly reduced, the sealing performance is good, the service life of a sealing piece is prolonged, and the service life of the sealing piece is prolonged. And the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically a pneumatic high-temperature dustproof shut-off ball valve. Background Technology

[0002] In industrial production processes, ball valves are a common fluid control device widely used for the shut-off and regulation of various fluid media. However, in systems with high dust content, the use of traditional ball valves faces numerous challenges.

[0003] First, tiny particles in a dusty environment can easily come into contact with the sealing surface of the ball valve as the fluid flows. These hard or sharp foreign objects will continuously rub against the sealing surface during the opening and closing of the valve, causing scratches on the sealing surface. This physical wear not only reduces the sealing performance of the valve, but may also accelerate the aging of the sealing material and shorten the service life of the valve. Second, dust particles can also easily remain and accumulate between the contact surfaces of the ball and the valve seat. Over time, these residues will gradually harden and form jams, causing the ball to experience additional resistance when rotating, and even making it impossible to completely close or open. This situation not only affects the normal operation of the valve, but may also lead to system leakage, posing a serious threat to production safety and product quality. Therefore, we propose a pneumatic high-temperature dustproof shut-off ball valve to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a pneumatic high-temperature dustproof shut-off ball valve, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A pneumatic high-temperature dustproof shut-off ball valve includes a valve assembly, a valve body assembly, a valve seat assembly, an actuator assembly, and a valve stem assembly. The valve body and the actuator assembly are connected to each other via an adapter shaft and a bracket. The valve body assembly includes a valve cover, a valve body, a ball, a packing gland, a gasket, a bracket, an adapter shaft, a packing sleeve, and a packing spacer ring. The valve stem assembly includes a thrust pad, packing, a spiral wound pad, a packing box, and a valve stem.

[0009] The bottom end of the valve stem is fixedly connected to a connecting handle, which is engaged with the top end of the ball. The truncated cone mounting groove of the valve body is engaged with the connecting handle. The stuffing box contains packing material, which is divided into inner packing and outer packing. The thrust pad is made of copper alloy, and the outer packing is made of rubber. The inner and outer packing are wedge-shaped. The pneumatic high-temperature dustproof shut-off ball valve fixes the packing material by pressing the valve stem and the stuffing box together. The stuffing box is a multi-step truncated cone structure with a larger diameter at the top and a smaller diameter at the bottom. It has threaded holes on its circumference for connection with the valve body. The pneumatic high-temperature dustproof shut-off ball valve is connected to the top end of the valve body by fastening bolts passing through the bolt holes in the stuffing box.

[0010] Furthermore, the valve seat assembly includes a valve seat, inner valve seat packing, outer valve seat packing, valve seat gland, spring, and metal adjusting shim;

[0011] The valve seat assembly is fitted onto the valve cover. The valve seat and the valve seat cover are fitted together with a concave-convex fit and nested within each other. The inner and outer packing of the valve seat are both fixed on the steps of the valve seat. The inner and outer packing of the valve seat are fixed by pressing the valve seat and the valve seat cover together. The valve seat cover has a hole, and the spring is pressed into the hole. The inner diameter of the metal adjusting shim is the same as the inner diameter of the valve seat cover. The metal adjusting shim is fitted onto the valve seat cover by a fit.

[0012] Furthermore, the valve cover is divided into a left valve cover and a right valve cover. The valve body has a through hole inside to connect the left valve cover and the right valve cover. The left valve cover and the right valve cover fit together without gaps. The bottom of the valve body has multiple threaded holes, and the threaded holes are coaxial with the holes.

[0013] Furthermore, the stuffing box has a through hole through which the valve stem passes.

[0014] Furthermore, the actuator assembly includes a pressure reducing valve, a solenoid valve, a limit switch, a connector, a bend, and a cylinder; the pressure reducing valve, solenoid valve, limit switch, connector, bend, and cylinder constitute the actuator.

[0015] Furthermore, a bracket is movably contacted on the valve body, and the bracket has a connecting hole. The actuator is fixed through the connecting hole on the bracket. The valve stem is connected to the actuator through an adapter shaft. The pressure reducing valve and the solenoid valve are fixed to the actuator through a panel. The limit switch is fixed to the actuator through a thread on the bracket.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a pneumatic high-temperature dustproof shut-off ball valve, which has the following beneficial effects:

[0018] This invention utilizes a pressure-reducing valve to regulate the outlet pressure, achieving a constant system pressure. Once the pressure is constant, the gas is piped into a solenoid valve. When the solenoid valve is energized, its left path is activated, allowing the gas to enter the left chamber of the cylinder. Under the influence of air pressure, the piston in the cylinder begins to move. The piston overcomes the spring's preload through air pressure. When the piston reaches its limit position, the output shaft drives the valve stem via a transition shaft. The valve stem then drives the valve body, rotating it to open the valve. When the solenoid valve is de-energized, the spring returns to its original position, closing the valve. The valve, through an actuator, achieves rapid opening and closing. The structure is simple and less complex. The O-ring seals between the valve stem and valve body, and between the valve stem and stuffing box, are eliminated, significantly reducing manufacturing difficulty and improving sealing performance. This greatly reduces the frequency of seal replacement, extends seal life, and significantly reduces maintenance time, improving maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the other side of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram of area A in the middle;

[0023] Figure 5 This utility model Figure 3 A magnified structural diagram of area B in the middle.

[0024] In the diagram: 1. Valve body assembly; 101. Valve cover; 102. Valve body; 103. Ball; 104. Packing gland; 105. Gasket; 106. Bracket; 107. Adapter shaft; 108. Packing sleeve; 109. Packing spacer ring; 2. Valve seat assembly; 201. Valve seat; 202. Inner packing of valve seat; 203. Outer packing of valve seat; 204. Valve seat gland; 205. Spring; 206. Metal adjusting shim; 3. Actuator assembly; 301. Pressure reducing valve; 302. Solenoid valve; 303. Limit switch; 304. Connector; 305. Bend; 306. Cylinder; 4. Valve stem assembly; 401. Thrust pad; 402. Packing; 403. Spiral wound gasket; 404. Packing box; 405. Valve stem. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] like Figure 1-5 As shown, an embodiment of the present invention provides a pneumatic high-temperature dustproof shut-off ball valve, including a valve assembly, a valve body assembly 1, a valve seat assembly 2, an actuator assembly 3, and a valve stem assembly 4. The pneumatic high-temperature dustproof shut-off ball valve body and the actuator assembly 3 are interconnected via a transition shaft 107 and a bracket 106. The valve body assembly 1 includes a valve cover 101, a valve body 102, a ball 103, a packing gland 104, a gasket 105, a bracket 106, a transition shaft 107, a packing sleeve 108, and a packing spacer 109. The valve stem assembly 4 includes a thrust pad 401, packing 402, a spiral wound pad 403, a packing box 404, and a valve stem 405.

[0028] A connecting handle is fixedly connected to the bottom of the valve stem 405. The connecting handle is engaged with the top of the ball 103. The frustum mounting groove of the valve body 102 is engaged with the connecting handle. The packing box 404 contains packing 402, which is divided into inner packing and outer packing. The thrust pad 401 is made of copper alloy, and the outer packing is made of rubber. The inner and outer packings are wedge-shaped. The pneumatic high-temperature dustproof shut-off ball valve fixes the packing 402 by the upper and lower clamping of the valve stem 405 and the packing box 404. The packing box 404 is a multi-step frustum structure with a larger diameter at the top and a smaller diameter at the bottom. It has threaded holes in its circumference that connect to the valve body 102. The pneumatic high-temperature dustproof shut-off ball valve is connected to the top of the valve body 102 by fastening bolts passing through the bolt holes of the packing box 404. Gas is regulated by the pressure reducing valve 301 to achieve a constant system pressure. After the pressure is constant, the gas is connected to the solenoid valve 302 through a pipeline. When the solenoid valve 302 is energized, the electric... The left-side connection of solenoid valve 302 enables reversal, allowing gas to enter the left chamber of cylinder 306 through the pipeline. Under the influence of air pressure, the piston in cylinder 306 begins to move. The piston overcomes the preload of spring 205 through air pressure. When the piston reaches its limit position, the output shaft drives valve stem 405 via adapter shaft 107. Valve stem 405 then drives valve body 102, rotating it 90 degrees, thus opening the valve. When solenoid valve 302 is de-energized, spring 205 resets, and the valve closes. The valve, through the actuator, achieves rapid opening and closing. The structure is simple and less complex. The O-ring seals between valve stem 405 and valve body 102, and between valve stem 405 and packing box 404, are eliminated, greatly reducing processing difficulty and improving sealing performance. This significantly reduces the frequency of seal replacement, extends seal life, and greatly reduces daily maintenance time, improving maintenance efficiency.

[0029] In some embodiments, the valve seat assembly 2 includes a valve seat 201, an inner valve seat packing 202, an outer valve seat packing 203, a valve seat gland 204, a spring 205, and a metal adjusting shim 206.

[0030] Valve seat assembly 2 is fitted onto valve cover 101. Valve seat 201 and valve seat cover 204 are fitted together and nested together. Valve seat inner packing 202 and valve seat outer packing 203 are both fixed on the steps of valve seat 201. Valve seat inner packing 202 and valve seat outer packing 203 are fixed by pressing valve seat 201 against valve seat cover 204. Valve seat cover 204 has a hole, and spring 205 is pressed into the hole. The inner diameter of metal adjusting shim 206 is the same as the inner diameter of valve seat cover 204. Metal adjusting shim 206 is fitted onto valve seat cover 204.

[0031] In some embodiments, the valve cover 101 is divided into a left valve cover and a right valve cover. The valve body 102 has a through hole inside to connect the left valve cover and the right valve cover. The left valve cover and the right valve cover fit together without gaps. The bottom of the valve body 102 has multiple threaded holes, which are coaxial with the holes.

[0032] In some embodiments, a through hole is provided on the stuffing box 404, through which the valve stem 405 passes. When the actuator rotates, it drives the valve stem 405 and the ball to rotate, thereby opening and closing the valve and allowing the medium in the pipeline to flow or be cut off.

[0033] In some embodiments, the actuator assembly 3 includes a pressure reducing valve 301, a solenoid valve 302, a limit switch 303, a connector 304, a bend 305, and a cylinder 306.

[0034] The actuator consists of a pressure reducing valve 301, a solenoid valve 302, a limit switch 303, a connector 304, a bend 305, and a cylinder 306.

[0035] In some embodiments, a bracket 106 is movably contacted on the valve body 102, and the bracket 106 has a connection hole. The actuator is fixed through the connection hole on the bracket 106. The valve stem 405 is connected to the actuator through the adapter shaft 107. The pressure reducing valve 301 and the solenoid valve 302 are fixed to the actuator through the panel. The limit switch 303 is fixed to the actuator through the thread on the bracket 106.

[0036] In operation, the gas passes through the pressure reducing valve 301 to regulate the outlet pressure, achieving a constant system pressure. Once the pressure is constant, the gas enters the solenoid valve 302 via a pipeline. When the solenoid valve 302 is energized, its left side is activated, allowing the gas to enter the left chamber of the cylinder 306. Under the influence of air pressure, the piston in the cylinder 306 begins to move. The piston overcomes the preload force of the spring 205 through the air pressure. When the piston reaches its limit position, the output shaft drives the valve stem 405 via the adapter shaft 107. The valve stem 405 then drives... When valve body 102 rotates 90 degrees, the valve is in the open state. When solenoid valve 302 is de-energized, spring 205 resets, and the valve closes. The valve achieves rapid opening and closing through the actuator. The structure is simple and not overly complex. The O-ring seal between valve stem 405 and valve body 102, and between valve stem 405 and packing box 404, is eliminated, which greatly reduces the difficulty of processing and provides better sealing performance. This significantly reduces the frequency of replacing some seals, increases the service life of seals, and greatly reduces the time spent on daily maintenance, thus improving maintenance efficiency.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic high-temperature dustproof shut-off ball valve, comprising a valve assembly, a valve body assembly (1), a valve seat assembly (2), an actuator assembly (3), and a valve stem assembly (4), wherein the pneumatic high-temperature dustproof shut-off ball valve body and the actuator assembly (3) are interconnected via a transition shaft (107) and a bracket (106), characterized in that: The valve body assembly (1) includes a valve cover (101), a valve body (102), a ball (103), a packing gland (104), a gasket (105), a bracket (106), a connecting shaft (107), a packing sleeve (108), and a packing spacer (109). The valve stem assembly (4) includes a thrust pad (401), packing (402), a spiral wound pad (403), a packing box (404), and a valve stem (405). The valve stem (405) is fixedly connected to a connecting handle at its bottom end. The connecting handle is engaged with the top of the ball (103) in a mounting groove. The frustum mounting groove of the valve body (102) is engaged with the connecting handle. The packing box (404) contains packing (402). The packing (402) is divided into inner packing and outer packing. The thrust pad (401) is made of copper alloy. The outer packing is made of rubber. The inner and outer packings are wedge-shaped. The pneumatic high-temperature dustproof shut-off ball valve fixes the packing (402) by pressing the valve stem (405) and the packing box (404) together. The packing box (404) is a multi-step frustum structure with a larger diameter at the top and a smaller diameter at the bottom. It has a threaded hole in its circumference that connects to the valve body (102). The pneumatic high-temperature dustproof shut-off ball valve is threaded to the top of the valve body (102) by fastening bolts passing through the bolt holes of the packing box (404).

2. The pneumatic high-temperature dustproof shut-off ball valve according to claim 1, characterized in that: The valve seat assembly (2) includes a valve seat (201), valve seat inner packing (202), valve seat outer packing (203), valve seat gland (204), spring (205), and metal adjusting shim (206); The valve seat assembly (2) is fitted onto the valve cover (101). The valve seat (201) and the valve seat cover (204) are fitted together and nested together. The valve seat inner packing (202) and valve seat outer packing (203) of the valve seat (201) are both fixed on the steps of the valve seat (201). The valve seat inner packing (202) and valve seat outer packing (203) are fixed by pressing the valve seat (201) and the valve seat cover (204) together. The valve seat cover (204) has a hole, and the spring (205) is pressed into the hole. The inner diameter of the metal adjusting shim (206) is the same as the inner diameter of the valve seat cover (204). The metal adjusting shim (206) is fitted onto the valve seat cover (204) together.

3. The pneumatic high-temperature dustproof shut-off ball valve according to claim 2, characterized in that: The valve cover (101) is divided into a left valve cover and a right valve cover. The valve body (102) has a through hole inside to connect the left valve cover and the right valve cover. The left valve cover and the right valve cover fit together without gaps. The bottom of the valve body (102) has multiple threaded holes, and the threaded holes are coaxial with the holes.

4. The pneumatic high-temperature dustproof shut-off ball valve according to claim 3, characterized in that: The stuffing box (404) has a through hole, and the valve stem (405) passes through the through hole.

5. A pneumatic high-temperature dustproof shut-off ball valve according to claim 4, characterized in that: The actuator assembly (3) includes a pressure reducing valve (301), a solenoid valve (302), a limit switch (303), a connector (304), a bend (305), and a cylinder (306); The actuator consists of the pressure reducing valve (301), solenoid valve (302), limit switch (303), connector (304), bend (305) and cylinder (306).

6. A pneumatic high-temperature dustproof shut-off ball valve according to claim 5, characterized in that: The valve body (102) has a bracket (106) in movable contact with it. The bracket (106) has a connection hole. The actuator is fixed through the connection hole on the bracket (106). The valve stem (405) is connected to the actuator through the adapter shaft (107). The pressure reducing valve (301) and the solenoid valve (302) are fixed to the actuator through the panel. The limit switch (303) is fixed to the actuator through the thread on the bracket (106).

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