Pressure release valve capable of controlling flow

Abstract

The utility model discloses a pressure release valve capable of controlling flow, which relates to the technical field of pressure release valves and comprises a medium inlet and a valve seat, the valve seat is mounted above the medium inlet, a medium outlet is mounted on the right side of the valve seat, a limit block is arranged above the valve seat, and a movable block is mounted below the limit block through a valve rod. The pressure release valve capable of controlling the flow is provided with a flow adjusting frame, when the flow of a medium outlet needs to be adjusted, an electric telescopic rod can be started, the electric telescopic rod can drive a sliding rod to move up and down, and the sliding rod drives a first fixing block and a first rotating shaft assembly to move up and down; and then the first rotating shaft assembly drives a connecting strip to push a second fixing block and a flow adjusting frame, so that the flow adjusting frame can be driven to move left and right, the contact area of a filter screen and a medium in the flow adjusting frame can be adjusted, the flow of the medium can be adjusted, the flow adjusting frame moves leftwards, the flow is increased, and the flow adjusting frame moves rightwards, and the flow is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, in particular to a pressure relief valve capable of controlling flow. Background Art

[0002] When the pressure of a device or system exceeds a set value, a pressure relief valve automatically opens to release excess pressure, preventing damage to the equipment due to excessive pressure. In some applications, pressure relief valves are also used to precisely control the operating pressure of the equipment. By adjusting the set value of the pressure relief valve, you can ensure that the equipment operates in optimal working conditions.

[0003] Therefore, the pressure relief valve can accurately and consistently control the pressure. Once the pressure exceeds the set value, the pressure relief valve will immediately open and release the pressure in time, thus avoiding accidents caused by excessive pressure. This safe and stable feature has made the pressure relief valve widely used in the industrial field.

[0004] For example, the safety pressure relief valve with application number 202010363976.0 can be used as an elbow and can also relieve pressure safely and remove accumulated gas. It has an overpressure protection function and can automatically release pressure after the pressure exceeds the pressure relief set value, ensuring that the pressure on the water heater is no greater than the set pressure, greatly extending the service life of the water heater. It has the characteristics of saving installation space, simple structure, easy installation, high safety performance, and good heating effect. However, the device still has certain defects;

[0005] When the medium pressure exceeds the pressure relief set value, the medium can be discharged through the pressure relief port, but the pressure relief flow cannot be adjusted according to the actual situation, so the adaptability is low.

[0006] Therefore, we propose a flow-controllable pressure relief valve to solve the above-mentioned problems. Utility Model Content

[0007] The purpose of the present utility model is to provide a flow-controllable pressure relief valve to solve the problem in the current market raised in the above-mentioned background technology that when the medium pressure exceeds the pressure relief set value, the medium can be discharged through the pressure relief port position, but the pressure relief flow cannot be adjusted according to the actual situation, resulting in low adaptability.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a flow-controllable pressure relief valve, comprising a medium inlet and a valve seat, wherein the valve seat is installed above the medium inlet, and the medium outlet is installed on the right side of the valve seat, a limit block is provided above the valve seat, and a movable block is installed below the limit block through the valve stem;

[0009] A positioning rod is installed inside the medium outlet, and a sliding rod is sleeved on the positioning rod. A fixing seat is installed below the medium outlet, and an electric telescopic rod is installed inside the fixing seat, and the output end of the electric telescopic rod is connected to the bottom end of the sliding rod. A first fixed block is installed on the right side of the sliding rod, and a first rotating shaft assembly is installed on the front surface of the first fixed block. A limiting ring is installed inside the medium outlet through a connecting block, and a flow regulating frame is provided inside the limiting ring. A second fixed block is installed on the leftmost side of the flow regulating frame, and a second rotating shaft assembly is installed on the front surface of the second fixed block, and the second rotating shaft assembly is connected to the first rotating shaft assembly through a connecting strip.

[0010] Preferably, a spring cap is installed above the valve seat, and the spring cap and the valve seat are connected by a threaded structure.

[0011] With the above structural design, the spring cover cap protects the limit block and the valve stem below, and is convenient for disassembly of the spring cover cap.

[0012] Preferably, a sliding connection structure is formed between the valve stem and the valve seat, and a telescopic spring is provided on the outside of the valve stem, the upper end of the telescopic spring is connected to the inner wall of the valve seat, and the lower end of the telescopic spring is connected to the upper surface of the movable block.

[0013] With the above structural design, when the medium pressure at the medium outlet exceeds the pressure relief set value, the movable block and the valve stem are pressed to move upward. At this time, the telescopic spring is in a compressed state, and then the medium can be discharged through the medium outlet for pressure relief.

[0014] Preferably, the center line of the sliding rod coincides with the center line of the positioning rod, and a sliding connection structure is formed between the sliding rod and the positioning rod. The sliding rod passes through one side of the medium outlet, and a sealing ring is installed at the position where the sliding rod passes through the medium outlet.

[0015] With the above structural design, the slide bar can move up and down along the positioning bar when subjected to force. The positioning bar guides the slide bar, making the slide bar more stable when moving up and down without deviation.

[0016] Preferably, the center line of the electric telescopic rod coincides with the center line of the sliding rod, and the sliding rod is fixedly connected to the electric telescopic rod, and the interior of the sliding rod is designed as a hollow structure.

[0017] With the above-mentioned structural design, when the flow rate of the medium outlet needs to be adjusted, the electric telescopic rod can be started, and the electric telescopic rod can drive the sliding rod to move up and down, and the sliding rod drives the first fixed block and the first rotating shaft assembly to move up and down, and then the first rotating shaft assembly drives the connecting bar to push the second fixed block and the flow adjustment frame, thereby driving the flow adjustment frame to move left and right, so as to adjust the contact area between the filter screen and the medium in the flow adjustment frame, that is, to adjust the flow size of the medium. When the flow adjustment frame moves to the left, the flow rate increases, and when the flow adjustment frame moves to the right, the flow rate decreases.

[0018] Preferably, the center line of the limiting ring coincides with the center line of the flow regulating frame, and the inside of the limiting ring can abut against the outer wall of the flow regulating frame. A sliding connection structure is formed between the flow regulating frame and the limiting ring, and a filter is provided on the right side of the flow regulating frame.

[0019] With the above structural design, the limiting ring plays a guiding and limiting role on the flow regulating frame, so that the flow regulating frame is more stable when moving left and right and will not deviate.

[0020] Preferably, the filter screen is provided with a plurality of through holes, and the filter screen can be designed with stainless steel material.

[0021] With the above structural design, the filter screen can not only adjust the flow rate of the medium, but also filter out impurities in the medium, so that no additional filter components are required when the medium is depressurized.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the flow-controllable pressure relief valve:

[0023] 1. A flow adjustment frame is provided. When the flow of the medium outlet needs to be adjusted, the electric telescopic rod can be started, which can drive the sliding rod to move up and down. The sliding rod drives the first fixed block and the first rotating shaft assembly to move up and down. Then the first rotating shaft assembly drives the connecting bar to push the second fixed block and the flow adjustment frame, thereby driving the flow adjustment frame to move left and right, thereby adjusting the contact area between the filter screen and the medium in the flow adjustment frame, that is, adjusting the flow size of the medium. When the flow adjustment frame moves to the left, the flow increases, and when the flow adjustment frame moves to the right, the flow decreases;

[0024] 2. A filter is provided, which can not only adjust the flow rate of the medium, but also filter out impurities in the medium, so that no additional filter components are required when the medium is depressurized. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0026] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0027] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in the middle;

[0028] Figure 4 This is a schematic diagram of the position structure of the positioning rod and the sliding rod of the utility model;

[0029] Figure 5 This is a schematic diagram of the position structure of the flow regulating frame and the limiting ring of the utility model.

[0030] In the figure: 1. Medium inlet; 2. Valve seat; 3. Medium outlet; 4. Spring cap; 5. Limit block; 6. Valve stem; 7. Movable block; 8. Telescopic spring; 9. Positioning rod; 10. Sliding rod; 11. Fixed seat; 12. Sealing ring; 13. Electric telescopic rod; 14. First fixed block; 15. First rotating shaft assembly; 16. Connecting block; 17. Limiting ring; 18. Flow regulating frame; 19. Filter screen; 20. Second fixed block; 21. Second rotating shaft assembly; 22. Connecting strip. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-5The utility model provides a technical solution: a pressure relief valve with controllable flow, including a medium inlet 1, a valve seat 2, a medium outlet 3, a spring cap 4, a limit block 5, a valve stem 6, a movable block 7, a telescopic spring 8, a positioning rod 9, a sliding rod 10, a fixed seat 11, a sealing ring 12, an electric telescopic rod 13, a first fixed block 14, a first rotating shaft assembly 15, a connecting block 16, a limit ring 17, a flow regulating frame 18, a filter 19, a second fixed block 20, a second rotating shaft assembly 21 and a connecting strip 22. A valve seat 2 is installed above the medium inlet 1, and a spring cap 4 is installed above the valve seat 2. The spring cap 4 and the valve seat 2 are connected by a threaded structure. The spring cap 4 is connected to the lower The limit block 5 and valve stem 6 on the right side play a protective role and are convenient for disassembly of the spring cap 4. A medium outlet 3 is installed on the right side of the valve seat 2. A limit block 5 is provided above the valve seat 2, and a movable block 7 is installed below the limit block 5 through the valve stem 6. A sliding connection structure is formed between the valve stem 6 and the valve seat 2, and a telescopic spring 8 is provided on the outside of the valve stem 6. The upper end of the telescopic spring 8 is connected to the inner wall of the valve seat 2, and the lower end of the telescopic spring 8 is connected to the upper surface of the movable block 7. When the medium pressure at the medium outlet 3 exceeds the pressure relief set value, the movable block 7 and the valve stem 6 are pressed to move upward. At this time, the telescopic spring 8 is in a compressed state, and then the medium can be discharged through the medium outlet 3 for pressure relief.

[0033] A positioning rod 9 is installed inside the medium outlet 3, and a sliding rod 10 is sleeved on the positioning rod 9. The center line of the sliding rod 10 coincides with the center line of the positioning rod 9, and a sliding connection structure is formed between the sliding rod 10 and the positioning rod 9. The sliding rod 10 passes through one side of the medium outlet 3. A sealing ring 12 is installed at the position where the sliding rod 10 passes through the medium outlet 3, so that the sliding rod 10 can move up and down along the positioning rod 9 when subjected to force. The positioning rod 9 guides the sliding rod 10, making the sliding rod 10 more stable when moving up and down and will not deviate. A fixing seat 11 is installed below the medium outlet 3, and an electric telescopic rod 13 is installed inside the fixing seat 11. The center line of the electric telescopic rod 13 The center line of the slide rod 10 coincides with each other, and the slide rod 10 and the electric telescopic rod 13 are fixedly connected. The interior of the slide rod 10 is designed as a hollow structure. When the flow of the medium outlet 3 needs to be adjusted, the electric telescopic rod 13 can be started. The electric telescopic rod 13 can drive the slide rod 10 to move up and down, and the slide rod 10 drives the first fixed block 14 and the first rotating shaft assembly 15 to move up and down, and then the first rotating shaft assembly 15 drives the connecting bar 22 to push the second fixed block 20 and the flow regulating frame 18, thereby driving the flow regulating frame 18 to move left and right, thereby adjusting the contact area between the filter screen 19 and the medium in the flow regulating frame 18, that is, adjusting the flow size of the medium. 8 moves to the left, the flow rate increases, the flow regulating frame 18 moves to the right, the flow rate decreases, and the output end of the electric telescopic rod 13 is connected to the bottom end of the slide bar 10, the right side of the slide bar 10 is installed with a first fixed block 14, and the front surface of the first fixed block 14 is installed with a first rotating shaft assembly 15, the interior of the medium outlet 3 is installed with a limit ring 17 through a connecting block 16, the center line of the limit ring 17 coincides with the center line of the flow regulating frame 18, and the interior of the limit ring 17 can abut against the outer wall of the flow regulating frame 18, a sliding connection structure is formed between the flow regulating frame 18 and the limit ring 17, a filter screen 19 is provided on the right side of the flow regulating frame 18, and the limit ring 17 controls the flow. The adjustment frame 18 plays a guiding and limiting role, so that the flow adjustment frame 18 is more stable when moving left and right, and will not deviate. The flow adjustment frame 18 is arranged inside the limit ring 17. The second fixed block 20 is installed on the leftmost side of the flow adjustment frame 18, and the second rotating shaft assembly 21 is installed on the front surface of the second fixed block 20. The second rotating shaft assembly 21 is connected to the first rotating shaft assembly 15 through a connecting strip 22. A plurality of through holes are provided on the filter screen 19, and the filter screen 19 can be designed with stainless steel. The filter screen 19 can not only adjust the flow rate of the medium, but also filter impurities in the medium, so that no additional filter assembly is required when the medium is depressurized.

[0034] Working principle: When using this flow-controlled pressure relief valve, first, install the pressure relief valve at the location where it needs to be used. When the medium pressure at the medium outlet 3 exceeds the pressure relief set value, the movable block 7 and the valve stem 6 are pressed upward. At this time, the telescopic spring 8 is in a compressed state, and then the medium can be discharged through the medium outlet 3 for pressure relief.

[0035] When the flow rate at the medium outlet 3 needs to be adjusted, the electric telescopic rod 13 is activated, which drives the slide bar 10 to move up and down. The slide bar 10 then drives the first fixed block 14 and the first rotating shaft assembly 15 to move up and down. The first rotating shaft assembly 15 then drives the connecting bar 22 to push the second fixed block 20 and the flow regulating frame 18, thereby driving the flow regulating frame 18 to move left and right. This adjusts the contact area between the filter screen 19 in the flow regulating frame 18 and the medium, thereby adjusting the flow rate of the medium. Moving the flow regulating frame 18 to the left increases the flow rate, while moving the flow regulating frame 18 to the right decreases the flow rate. This completes a series of operations. Matters not described in detail in this specification belong to the prior art known to professionals skilled in the art.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flow-controllable pressure relief valve comprising a medium inlet (1) and a valve seat (2), characterized in that: A valve seat (2) is installed above the medium inlet (1), and a medium outlet (3) is installed on the right side of the valve seat (2). A limit block (5) is provided above the valve seat (2), and a movable block (7) is installed below the limit block (5) through a valve stem (6); A positioning rod (9) is installed inside the medium outlet (3), and a sliding rod (10) is sleeved on the positioning rod (9); a fixing seat (11) is installed below the medium outlet (3), and an electric telescopic rod (13) is installed inside the fixing seat (11), and the output end of the electric telescopic rod (13) is connected to the bottom end of the sliding rod (10); a first fixing block (14) is installed on the right side of the sliding rod (10), and a first rotating shaft assembly (15) is installed on the front surface of the first fixing block (14); a limiting ring (17) is installed inside the medium outlet (3) through a connecting block (16), and a flow regulating frame (18) is provided inside the limiting ring (17); a second fixing block (20) is installed on the leftmost side of the flow regulating frame (18), and a second rotating shaft assembly (21) is installed on the front surface of the second fixing block (20), and the second rotating shaft assembly (21) is connected to the first rotating shaft assembly (15) through a connecting bar (22).

2. The flow-controllable pressure relief valve according to claim 1, characterized in that: A spring cap (4) is installed above the valve seat (2), and the spring cap (4) and the valve seat (2) are connected via a threaded structure.

3. The flow-controllable pressure relief valve according to claim 1, characterized in that: A sliding connection structure is formed between the valve stem (6) and the valve seat (2), and a telescopic spring (8) is provided on the outside of the valve stem (6), the upper end of the telescopic spring (8) is connected to the inner wall of the valve seat (2), and the lower end of the telescopic spring (8) is connected to the upper surface of the movable block (7).

4. The flow-controllable pressure relief valve according to claim 1, characterized in that: The center line of the sliding rod (10) coincides with the center line of the positioning rod (9), and a sliding connection structure is formed between the sliding rod (10) and the positioning rod (9). The sliding rod (10) passes through one side of the medium outlet (3), and a sealing ring (12) is installed at the position where the sliding rod (10) passes through the medium outlet (3).

5. The flow-controllable pressure relief valve according to claim 1, characterized in that: The center line of the electric telescopic rod (13) and the center line of the slide rod (10) coincide with each other, and the slide rod (10) and the electric telescopic rod (13) are fixedly connected, and the interior of the slide rod (10) is designed to be a hollow structure.

6. The flow-controllable pressure relief valve according to claim 1, characterized in that: The center line of the limiting ring (17) and the center line of the flow regulating frame (18) coincide with each other, and the interior of the limiting ring (17) can abut against the outer wall of the flow regulating frame (18), and a sliding connection structure is formed between the flow regulating frame (18) and the limiting ring (17). A filter screen (19) is provided on the right side of the flow regulating frame (18).

7. The flow-controllable pressure relief valve according to claim 6, characterized in that: The filter screen (19) is provided with a plurality of through holes, and the filter screen (19) can be designed with stainless steel material.

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