Self-operated multi-stage rotary pressure reducing valve

Abstract

The utility model relates to the technical field of self-operated regulating valves, in particular to a self-operated multistage rotary pressure reducing valve which comprises a valve body, a piston block is tightly attached to the inner wall of the top of the valve body, a valve rod is fixedly connected to the inner wall of the piston block, a valve block is fixedly connected to the bottom of the valve rod, and the outer wall of the valve block is attached to the inner wall of the valve body. A seat body is fixedly connected to the upper portion of the outer wall of the valve rod, a shell is in clearance fit with the upper portion of the outer wall of the valve rod, and a spring is fixedly connected to the bottom of the shell. Through cooperation of a valve body, a valve block, a piston block, a block body, a limiting rod, a seat body, a vertical cylinder, a shell, a valve rod, a spring and a rotating structure, when the device is used, a worm can be rotated, the worm drives a worm wheel to rotate, the worm wheel drives a screw to rotate, the screw drives the seat body to move upwards, and the seat body and the shell are matched to compress the spring; and therefore, a worker can conveniently carry out direct multi-stage adjustment on the self-operated adjusting valve, and the worker can conveniently use the self-operated adjusting valve.

Description

Technical Field

[0001] This utility model relates to the field of self-regulating valve technology, specifically a self-regulating multi-stage rotary pressure reducing valve. Background Technology

[0002] A self-operated regulating valve, also known as a self-operated control valve, is a type of regulating valve that relies on the pressure of the medium flowing through the valve itself as an energy source to drive the valve to work automatically, without the need for an external power supply or secondary instruments.

[0003] A self-operated regulating valve (application number: 202420186312.5) that prevents valve stem wear uses a piston block to squeeze excess grease into the connecting cover, and the piston block can prevent grease from entering the valve body and mixing with the fluid inside the valve body. However, the above still has its drawbacks. When using a self-operated regulating valve, it is often necessary to adjust the pressure according to the usage requirements. An external rod is inserted into the adjustment groove of the self-operated regulating valve and rotated to achieve multi-stage adjustment of the self-operated regulating valve. This is inconvenient for operators to directly adjust the self-operated regulating valve in multiple stages, making it inconvenient for operators to use. Furthermore, when using the self-operated regulating valve, the top of the self-operated regulating valve will be adjusted with the medium pipeline, and the medium will enter the housing to apply pressure to the pressure plate. Since the valve stem passes through the inner wall of the housing, it is not convenient for operators to perform double sealing, which can easily lead to leakage at the housing and valve stem positions. Summary of the Invention

[0004] The purpose of this utility model is to solve the shortcomings of the existing technology, such as the inconvenience for operators to directly adjust the self-operated regulating valve in multiple stages, the inconvenience for operators to use, the inconvenience for operators to perform double sealing work, and the easy occurrence of leakage at the position of the shell and valve stem. Therefore, a self-operated multi-stage rotary pressure reducing valve is proposed.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-operated multi-stage rotary pressure reducing valve is designed, comprising a valve body, characterized in that: a piston block is tightly fitted to the inner wall of the top of the valve body; a valve stem is fixedly connected to the inner wall of the piston block; a valve block is fixedly connected to the bottom of the valve stem; the outer wall of the valve block is fitted to the inner wall of the valve body; a seat is fixedly connected to the upper part of the outer wall of the valve stem; a housing is fitted with a clearance fit to the upper part of the outer wall of the valve stem; a spring is fixedly connected to the bottom of the housing; the bottom of the spring is fixedly connected to the top of the seat; a block is fitted with a clearance fit to the lower part of the outer wall of the valve stem; the bottom of the block is fixedly connected to the top of the valve body; a limit rod is fixedly connected to one end of the block; and a rotating structure is provided on one side of the limit rod.

[0007] Preferably, the rotating structure includes a horizontal block, the inner wall of which is clearance-fitted with the lower outer wall of the limiting rod, one end of which is fixedly connected to the lower side of one side of the seat, a housing on one side of the horizontal block, the bottom of which is fixedly connected to the top of the block, a screw rotatably connected to the upper inner wall of the housing via a bearing, a worm gear fixedly connected to the bottom of the screw, the inner walls of the worm gear and the screw being clearance-fitted with the lower outer wall of the valve stem, the upper outer wall of the screw being threadedly connected to the lower inner wall of the seat, a worm gear meshing with the rear of the worm gear, and one side of the outer wall of the worm gear being rotatably connected to the inner wall of one end of the housing via a bearing.

[0008] Preferably, the top of the limiting rod is fixedly connected to one side of the bottom of the housing.

[0009] Preferably, a rubber pad is tightly fitted to the upper part of the outer wall of the valve stem, and the bottom of the rubber pad is fixedly connected to the bottom of the inner wall of the housing.

[0010] Preferably, a pressure plate is fixedly connected to the top of the valve stem.

[0011] Preferably, a rubber sleeve is fixedly connected to the outer wall of the pressure plate, and the outer wall of the rubber sleeve is in contact with the inner wall of the housing.

[0012] The self-operated multi-stage rotary pressure reducing valve proposed in this utility model has the following advantages: through the cooperation of the valve body, valve block, piston block, block body, limit rod, seat body, vertical cylinder, shell, valve stem, spring and rotating structure, the device can be used by rotating the worm gear, which drives the worm wheel to rotate, the worm wheel drives the screw to rotate, and the screw drives the seat body to move upward. The seat body and shell cooperate to compress the spring, thereby facilitating the operator to directly adjust the self-operated regulating valve in multiple stages, making it convenient for the operator to use.

[0013] By cooperating with the housing, valve stem, pressure plate, rubber sleeve, and rubber gasket, the device can achieve a one-sided seal by tightly fitting the inner wall of the rubber gasket against the upper outer wall of the valve stem, and a secondary seal by fitting the rubber sleeve against the inner wall of the housing. This allows for double sealing by the operator and prevents leakage at the housing and valve stem positions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the shell, pressure plate, and rubber sleeve structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the base, screw, and worm gear structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the limiting rod, ball bearing, and cross block structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the valve block, piston block, and valve stem structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the outer shell, worm gear, and worm structure of this utility model.

[0020] In the diagram: 1. Valve body, 2. Rotating structure, 2a1. Housing, 2a2. Screw, 2a3. Horizontal block, 2a4. Worm gear, 2a5. Worm, 2b1. Ball bearing, 3. Valve block, 4. Piston block, 5. Block, 6. Limiting rod, 7. Seat, 8. Valve stem, 9. Housing, 10. Pressure plate, 11. Rubber sleeve, 12. Rubber pad, 13. Spring. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: Example

[0022] See attached document Figure 1-6 In this embodiment, a self-operated multi-stage rotary pressure reducing valve includes a valve body 1. A piston block 4 is tightly fitted to the inner wall of the top of the valve body 1, and the piston block 4 serves as a seal. A valve stem 8 is fixedly connected to the inner wall of the piston block 4. A valve block 3 is fixedly connected to the bottom of the valve stem 8. The outer wall of the valve block 3 is fitted to the inner wall of the valve body 1. A seat 7 is fixedly connected to the upper part of the outer wall of the valve stem 8. A housing 9 is fitted with the upper part of the outer wall of the valve stem 8 with clearance. A sealing ring is fixedly connected to the inner wall of the bottom of the housing 9. A spring 13 is fixedly connected to the bottom of the housing 9. The bottom of the spring 13 is fixedly connected to the top of the seat 7.

[0023] A block 5 is fitted with a gap at the lower outer wall of the valve stem 8. A sealing ring is fixedly connected to the inner top of the block 5. The bottom of the block 5 is fixedly connected to the top of the valve body 1. A limit rod 6 is fixedly connected to one end of the block 5. The top of the limit rod 6 is fixedly connected to one side of the bottom of the housing 9. A rubber pad 12 is tightly fitted to the upper outer wall of the valve stem 8.

[0024] The bottom of the rubber pad 12 is fixedly connected to the bottom of the inner wall of the housing 9, and the rubber pad 12 plays a sealing role. The top of the valve stem 8 is fixedly connected to the pressure plate 10, and the outer wall of the pressure plate 10 is fixedly connected to the rubber sleeve 11. The outer wall of the rubber sleeve 11 fits against the inner wall of the housing 9, and the rubber sleeve 11 plays a sealing role. A rotating structure 2 is provided on one side of the limit rod 6. The rotating structure 2 facilitates the operator to directly adjust the self-operated regulating valve in multiple stages, making it convenient for the operator to use.

[0025] The rotating structure 2 includes a horizontal block 2a3. The inner wall of the horizontal block 2a3 is fitted with the lower part of the outer wall of the limiting rod 6 with a clearance. The limiting rod 6 plays a limiting role when the horizontal block 2a3 moves up and down under force. One end of the horizontal block 2a3 is fixedly connected to the lower side of the seat body 7. A shell 2a1 is provided on one side of the horizontal block 2a3. The bottom of the shell 2a1 is fixedly connected to the top of the block 5. The top inner wall of the shell 2a1 is rotatably connected to a screw 2a2 through a bearing. The bearing allows the screw 2a2 to rotate on the top inner wall of the shell 2a1 when it is under force.

[0026] A worm gear 2a4 is fixedly connected to the bottom of the screw 2a2. The inner wall of the worm gear 2a4 and the screw 2a2 is clearance-fitted with the lower part of the outer wall of the valve stem 8. The upper part of the outer wall of the screw 2a2 is threadedly connected to the bottom inner wall of the seat 7. A worm 2a5 is meshed and connected to the rear of the worm gear 2a4. One side of the outer wall of the worm 2a5 is rotatably connected to the inner wall of one end of the outer casing 2a1 through a bearing. This facilitates direct multi-stage adjustment of the self-operated regulating valve by the operator, making it convenient for the operator to use.

[0027] Working principle:

[0028] When adjusting a self-operated regulating valve:

[0029] Rotating the worm gear 2a5 drives the worm wheel 2a4 to rotate, which in turn drives the screw 2a2 to rotate. The screw 2a2 then moves the seat 7 upward. The seat 7 and the housing 9 work together to compress the spring 13, thus achieving multi-stage regulation. The top of the housing 9 is connected to the medium pipeline. When the medium flows inside the valve body 1, the pressure of the medium causes the valve block 3 to move upward, thereby opening the valve body 1 and allowing the medium to flow. The valve block 3 drives the valve stem 8 to move upward, and the valve stem 8 compresses the spring 13. At the same time, the medium after passing through the valve body 1 enters the interior of the housing 9 through the external connecting pipe. The medium will exert a certain pressure on the pressure plate 10. When the pressure of the outflowing medium is too high, the medium squeezes the pressure plate 10 downward. The pressure plate 10 drives the valve stem 8 to move downward, thereby causing the valve block 3 to fit against the inner wall of the valve body 1, thus blocking the flow of the medium and realizing the use of a self-operated regulating valve. Example

[0030] See attached document Figure 1-6 In this embodiment, a self-operated multi-stage rotary pressure reducing valve is provided, wherein the rotary structure 2 may further include a ball 2b1, one side of the outer wall of the ball 2b1 is in clearance fit with a groove at one end of the inner wall of the transverse block 2a3, and one end of the ball 2b1 is in contact with the lower part of the outer wall of the limiting rod 6.

[0031] Working principle:

[0032] When the horizontal block 2a3 moves up and down under force, the horizontal block 2a3 drives the ball 2b1 to move up and down, and the ball 2b1 rolls, thereby reducing friction and improving the smoothness of adjustment.

[0033] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A self-operated multi-stage rotary pressure reducing valve, comprising a valve body (1), characterized in that: A piston block (4) is tightly fitted to the inner wall of the top of the valve body (1). A valve stem (8) is fixedly connected to the inner wall of the piston block (4). A valve block (3) is fixedly connected to the bottom of the valve stem (8). The outer wall of the valve block (3) is fitted to the inner wall of the valve body (1). A seat (7) is fixedly connected to the upper part of the outer wall of the valve stem (8). A housing (9) is fitted with a clearance above the outer wall of the valve stem (8). A spring (13) is fixedly connected to the bottom of the housing (9). The bottom of the spring (13) is fixedly connected to the top of the seat (7). A block (5) is fitted with a clearance below the outer wall of the valve stem (8). The bottom of the block (5) is fixedly connected to the top of the valve body (1). A limit rod (6) is fixedly connected to one end of the block (5). A rotating structure (2) is provided on one side of the limit rod (6).

2. The self-operated multi-stage rotary pressure reducing valve according to claim 1, characterized in that: The rotating structure (2) includes a horizontal block (2a3). The inner wall of the horizontal block (2a3) is in clearance fit with the lower outer wall of the limiting rod (6). One end of the horizontal block (2a3) is fixedly connected to the lower side of one side of the seat (7). A shell (2a1) is provided on one side of the horizontal block (2a3). The bottom of the shell (2a1) is fixedly connected to the top of the block (5). A screw (2a2) is rotatably connected to the upper inner wall of the shell (2a1) through a bearing. A worm gear (2a4) is fixedly connected to the bottom of the screw (2a2). The inner walls of the worm gear (2a4) and the screw (2a2) are in clearance fit with the lower outer wall of the valve stem (8). The upper outer wall of the screw (2a2) is threadedly connected to the lower inner wall of the seat (7). A worm (2a5) is meshed with the rear of the worm gear (2a4). One side of the outer wall of the worm (2a5) is rotatably connected to the inner wall of one end of the shell (2a1) through a bearing.

3. The self-operated multi-stage rotary pressure reducing valve according to claim 1, characterized in that: The top of the limiting rod (6) is fixedly connected to one side of the bottom of the housing (9).

4. The self-operated multi-stage rotary pressure reducing valve according to claim 1, characterized in that: A rubber pad (12) is tightly attached to the upper part of the outer wall of the valve stem (8), and the bottom of the rubber pad (12) is fixedly connected to the bottom of the inner wall of the housing (9).

5. The self-operated multi-stage rotary pressure reducing valve according to claim 1, characterized in that: A pressure plate (10) is fixedly connected to the top of the valve stem (8).

6. The self-operated multi-stage rotary pressure reducing valve according to claim 5, characterized in that: A rubber sleeve (11) is fixedly connected to the outer wall of the pressure plate (10), and the outer wall of the rubber sleeve (11) is in contact with the inner wall of the shell (9).

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