Pressure control valve

Abstract

The utility model relates to the technical field of control valves, and discloses a pressure control valve which comprises a valve body, a pressure reducing pipeline is arranged on one side of the valve body, a pressure reducing mechanism is arranged on the inner side wall of the pressure reducing pipeline, a flange plate A is fixedly connected to one side of the pressure reducing pipeline, and a filtering mechanism is in threaded connection with one side of the flange plate A; a handle is in threaded connection with the surface of the top end of the valve body. According to the pressure control valve, through the arrangement of the pressure reducing pipeline and the pressure reducing mechanism, when the valve device is opened, fluid firstly flows through the slope surface of the pressure reducing pipeline, the flow speed of the fluid is increased due to the gradual reduction of the section of the pipeline, and the increase of the flow speed causes the reduction of the static pressure of the fluid; due to the arrangement of the multiple sets of slope faces, fluid can gradually adapt to pressure changes in the pressure reduction process, rapid pressure reduction is avoided, impact and vibration of the fluid on a pipeline are reduced, the service life of the valve is prolonged, and the stability and safety of a system are protected.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a pressure control valve. Background Technology

[0002] Pressure control valves are a general term for valves that control pressure. In everyday language, we generally refer to any valve that controls pressure as a pressure control valve. Pressure control valves are sometimes simply called pressure valves, and they are primarily used to meet the force or torque requirements of actuators. They include safety valves, relief valves, pressure reducing valves, and sequence valves. Control valves are valves that regulate flow, pressure, or temperature by changing the cross-sectional area of ​​the passage through the activation of opening and closing elements; among them, control valves primarily used for controlling pressure are called pressure control valves.

[0003] A pressure control valve disclosed in CN216143183U includes a valve body. A combined end cap is sealed to the top of the valve body, and a shaft seal is fixedly connected to the top of the combined end cap. A ladder is fixed to the lower interior of the shaft seal, and an adjusting shaft is inserted through the ladder. A spring is sleeved on the outer side of the ladder, and a pressure plate is sleeved on the upper outer side of the adjusting shaft. A combined disc is fixed to the upper interior of the valve body. In this invention, through the ladder, collection chamber, spring, second chamber, and first chamber, the oil dripping from the spring is quickly carried into the collection chamber by the guide effect of the ladder, passing through the second and first chambers sequentially. This achieves the collection of lubricating oil, preventing the oil from contaminating the inside of the control valve after solidification.

[0004] While the aforementioned patent achieves the collection of lubricating oil, preventing the solidified oil from contaminating the inside of the control valve, the device lacks a built-in filter, increasing the risk of impurities getting stuck. Furthermore, the absence of a pressure-reducing structure means that the medium flowing through the valve body will cause some impact, and excessive pressure may place an excessive pressure load on the internal structure of the valve body, thereby increasing the risk of damage and shortening the valve body's service life. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this utility model is to provide a pressure control valve to solve the problems mentioned in the background art, such as the lack of a built-in filter, which increases the risk of impurity blockage, the lack of a pressure reduction structure, the impact of the medium flowing through the valve body, and the possibility that excessive pressure may cause excessive pressure load on the internal structure of the valve body, thereby increasing the risk of damage and shortening the service life of the valve body.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pressure control valve, comprising a valve body, a pressure-reducing pipe provided on one side of the valve body, a pressure-reducing mechanism provided on the inner wall of the pressure-reducing pipe, a flange A fixedly connected to one side of the pressure-reducing pipe, a filter mechanism threadedly connected to one side of the flange A, a handle threadedly connected to the top surface of the valve body, an upper valve stem snapped into the inner bottom of the handle, a sealing mechanism sleeved on the surface of the upper valve stem, the pressure-reducing mechanism comprising multiple sets of inclined surfaces provided on the inner wall of the pressure-reducing pipe, two sets of connecting frames provided inside the pressure-reducing pipe, buffer columns fixedly connected to the surfaces of the two sets of connecting frames, the filter mechanism comprising a flange B threadedly connected to one side of the flange A, a filter pipe fixedly connected to one side of the flange B, a filter screen provided inside the filter pipe, and the sealing mechanism comprising an inner sealing layer sleeved on the surface of the upper valve stem, an outer sealing layer provided on the surface of the inner sealing layer, and the outer sealing layer snapped into the inner wall of the valve body.

[0009] As a further embodiment of this utility model, an upper spring is sleeved on the surface of the upper valve stem, and a movable part is provided at the bottom of the upper spring. An upper diaphragm is snapped onto the surface of the movable part. The upper diaphragm controls the movement of the lower valve stem to regulate the opening of the valve.

[0010] As a further embodiment of this utility model, a partition is provided inside the valve body, and a moving channel is connected through the bottom of the partition. The partition serves to separate the internal cavity of the valve body.

[0011] As a further embodiment of this utility model, a lower valve rod is slidably connected inside the moving channel, and a lower diaphragm is provided at the bottom of the lower valve rod. The lower valve rod controls the movement of the lower diaphragm.

[0012] As a further embodiment of this utility model, a valve seat is provided below the lower diaphragm, and a lower top plate is provided inside the valve seat. A lower spring is sleeved at the bottom of the lower top plate. The lower spring provides the closing force for the valve.

[0013] As a further embodiment of this utility model, the valve body, partition, and valve seat are all made of metal, the inner sealing layer is made of elastic material, and the outer sealing layer is made of high-hardness material. The inner and outer sealing layers together provide a leak-proof function.

[0014] As a further embodiment of this utility model, a flange C is fixedly connected to one side of the filter pipe, and a flange D is fixedly connected to one side of the valve body. The flange C and flange D serve to connect to the external pipe.

[0015] (III) Beneficial Effects

[0016] This utility model provides a pressure control valve, which has the following beneficial effects:

[0017] 1. This pressure control valve, through the setting of pressure-reducing pipeline and pressure-reducing mechanism, allows the fluid to first flow through the inclined surface of the pressure-reducing pipeline when the valve is opened. As the cross-section of the pipeline gradually decreases, the fluid velocity increases, which leads to a decrease in the static pressure of the fluid. The setting of multiple inclined surfaces allows the fluid to gradually adapt to the pressure change during the pressure reduction process, avoiding a sharp drop in pressure. This reduces the impact and vibration of the fluid on the pipeline, extends the service life of the valve, and protects the stability and safety of the system.

[0018] 2. This pressure control valve, through the installation of flanges A and C and a filter mechanism, allows the fluid to pass through a filter pipe before entering the valve body. The filter screen inside the filter pipe intercepts large particulate impurities in the fluid, preventing them from entering the valve body. Flanges are installed on both sides of the filter pipe, which connect to the outside for easy disassembly and cleaning maintenance. This reduces the failure rate caused by impurities clogging the pressure valve. At the same time, the filter screen can be maintained without disassembling the entire valve, saving time and effort. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the filter mechanism structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the pressure reduction mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model.

[0023] In the diagram: 1. Valve body; 2. Pressure reducing pipeline; 3. Pressure reducing mechanism; 301. Sloping surface; 302. Connecting frame; 303. Buffer column; 4. Flange A; 5. Filtering mechanism; 501. Flange B; 502. Filter pipeline; 503. Filter screen; 6. Handle; 7. Upper valve stem; 8. Sealing mechanism; 801. Inner sealing layer; 802. Outer sealing layer; 9. Upper spring; 10. Moving part; 11. Upper diaphragm; 12. Baffle plate; 13. Moving channel; 14. Lower valve stem; 15. Lower diaphragm; 16. Valve seat; 17. Lower top plate; 18. Lower spring; 19. Flange C; 20. Flange D. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution: a pressure control valve, including a valve body 1, a pressure reducing pipe 2 provided on one side of the valve body 1, a pressure reducing mechanism 3 provided on the inner wall of the pressure reducing pipe 2, a flange A4 fixedly connected to one side of the pressure reducing pipe 2, a filter mechanism 5 threadedly connected to one side of the flange A4, a handle 6 threadedly connected to the top surface of the valve body 1, an upper valve stem 7 snapped into the inner bottom of the handle 6, a sealing mechanism 8 sleeved on the surface of the upper valve stem 7, and the pressure reducing mechanism 3 including multiple sets of inclined surfaces 301 provided on the inner wall of the pressure reducing pipe 2, for pressure reduction. The pipe 2 is equipped with two sets of connecting brackets 302. The surfaces of the two sets of connecting brackets 302 are fixedly connected with buffer columns 303. The filter mechanism 5 includes a flange B501 threaded to one side of the flange A4. A filter pipe 502 is fixedly connected to one side of the flange B501. A filter screen 503 is installed inside the filter pipe 502. The sealing mechanism 8 includes an inner sealing layer 801 sleeved on the surface of the upper valve stem 7. An outer sealing layer 802 is provided on the surface of the inner sealing layer 801. The outer sealing layer 802 is snapped onto the inner wall of the valve body 1.

[0026] An upper spring 9 is sleeved on the surface of the upper valve stem 7. A movable part 10 is provided at the bottom of the upper spring 9. An upper diaphragm 11 is snapped onto the surface of the movable part 10. The upper diaphragm 11 controls the movement of the lower valve stem 14 to regulate the opening of the valve.

[0027] The valve body 1 has a partition 12 inside, and a moving channel 13 is connected through the bottom of the partition 12. The partition 12 serves to separate the internal cavity of the valve body 1.

[0028] The moving channel 13 is internally slidably connected to a lower valve stem 14, and a lower diaphragm 15 is provided at the bottom of the lower valve stem 14. The lower valve stem 14 is used to control the movement of the lower diaphragm 15.

[0029] A valve seat 16 is provided below the lower diaphragm 15. A lower top plate 17 is provided inside the valve seat 16. A lower spring 18 is sleeved at the bottom of the lower top plate 17. The lower spring 18 provides the closing force of the valve.

[0030] The valve body 1, the partition 12, and the valve seat 16 are all made of metal. The inner sealing layer 801 is made of elastic material, and the outer sealing layer 802 is made of high-hardness material. The inner sealing layer 801 and the outer sealing layer 802 together play a role in preventing leakage.

[0031] A flange C19 is fixedly connected to one side of the filter pipe 502, and a flange D20 is fixedly connected to one side of the valve body 1. The flanges C19 and D20 serve to connect to the external pipes.

[0032] In this invention, the working steps of the device are as follows:

[0033] First step: When the valve device is opened, the fluid first flows through the ramp surface 301 of the pressure reducing pipe 2. As the pipe cross-section gradually decreases, the fluid velocity increases. The increase in velocity leads to a decrease in the static pressure of the fluid. The setting of multiple ramp surfaces 301 allows the fluid to gradually adapt to the pressure change during the pressure reduction process, avoiding a sharp drop in pressure.

[0034] The second step: Before the fluid enters the valve body 1, the fluid first passes through the filter pipe 502. The filter screen 503 installed inside the filter pipe 502 intercepts large particulate impurities in the fluid and prevents them from entering the valve body 1. Flanges are installed on both sides of the filter pipe 502, which are connected to the outside for easy disassembly, cleaning and maintenance.

[0035] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0036] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure control valve comprising a valve body (1), characterized in that: A pressure-reducing pipe (2) is provided on one side of the valve body (1). A pressure-reducing mechanism (3) is provided on the inner wall of the pressure-reducing pipe (2). A flange A (4) is fixedly connected to one side of the pressure-reducing pipe (2). A filter mechanism (5) is threadedly connected to one side of the flange A (4). A handle (6) is threadedly connected to the top surface of the valve body (1). An upper valve stem (7) is snapped into the bottom of the handle (6). A sealing mechanism (8) is sleeved on the surface of the upper valve stem (7). The pressure reducing mechanism (3) includes multiple sets of inclined surfaces (301) set on the inner side wall of the pressure reducing pipe (2). The inside of the pressure reducing pipe (2) is provided with two sets of connecting frames (302), and buffer columns (303) are fixedly connected to the surfaces of the two sets of connecting frames (302). The filtration mechanism (5) includes a flange B (501) threaded to one side of flange A (4), a filter pipe (502) fixedly connected to one side of flange B (501), and a filter screen (503) provided inside the filter pipe (502). The sealing mechanism (8) includes an inner sealing layer (801) sleeved on the surface of the upper valve stem (7), and an outer sealing layer (802) is provided on the surface of the inner sealing layer (801). The outer sealing layer (802) is snapped onto the inner wall of the valve body (1).

2. A pressure control valve according to claim 1, characterized in that: An upper spring (9) is sleeved on the surface of the upper valve stem (7), and a moving part (10) is provided at the bottom of the upper spring (9). An upper diaphragm (11) is snapped onto the surface of the moving part (10).

3. A pressure control valve according to claim 1, characterized in that: The valve body (1) is provided with a partition (12) inside, and a moving channel (13) is connected through the bottom of the partition (12).

4. A pressure control valve according to claim 3, wherein: The moving channel (13) is internally slidably connected to a lower valve stem (14), and a lower diaphragm (15) is provided at the bottom of the lower valve stem (14).

5. A pressure control valve according to claim 4, characterised in that: A valve seat (16) is provided below the lower diaphragm (15), and a lower top plate (17) is provided inside the valve seat (16). A lower spring (18) is sleeved at the bottom of the lower top plate (17).

6. A pressure control valve according to claim 1, characterized in that: The valve body (1), partition (12), and valve seat (16) are all made of metal, the inner sealing layer (801) is made of elastic material, and the outer sealing layer (802) is made of high-hardness material.

7. A pressure control valve according to claim 1, characterized in that: A flange C (19) is fixedly connected to one side of the filter pipe (502), and a flange D (20) is fixedly connected to one side of the valve body (1).

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