Pressure relief valve with helical marking

Abstract

The utility model provides a kind of pressure relief valve with spiral mark, including indicating gland, the top surface of indicating gland is provided with several steps in spiral ladder shape, the corner between adjacent two steps is α, and the perpendicular distance is b;Sealing sleeve, slidingly set in indicating gland, and one end is abutted with medium inlet;Adjusting gland is threadedly connected with indicating gland, when adjusting gland turns ∠α, adjusting gland moves distance b;The present application directly obtains the adjustment amount by adjusting the single rotation angle of gland, to avoid the error caused by experience estimation.

Description

Technical Field

[0001] This utility model relates to a pressure relief valve, and more particularly to a pressure relief valve with a spiral mark. Background Technology

[0002] A pressure relief valve is a safety protection device used to control the internal pressure of a system or equipment and prevent damage from overpressure. Its core function is to automatically open when the system pressure exceeds a set threshold to release excess medium, thereby controlling the pressure within a safe range and avoiding dangerous accidents such as explosions and leaks.

[0003] Existing spring-loaded or pilot-operated pressure relief valves mostly use spring preload to set pressure, which is prone to pressure setting deviations that can lead to malfunctions or failures to operate. The pressure adjustment amount of the pressure relief valve lacks intuitive markings, making it difficult for operators to quickly judge the adjustment range. Especially in scenarios where multiple devices are connected in parallel or require frequent adjustments, inconsistent adjustments can easily cause system pressure fluctuations. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pressure relief valve with a spiral marking. The visualization of the spiral marking allows operators to directly obtain the adjustment amount by adjusting the angle of the gland with a single rotation, avoiding errors caused by estimation based on experience. This is particularly suitable for scenarios requiring extremely high pressure control precision. The technical solution adopted by this invention is as follows: A pressure relief valve with a spiral marking, comprising: The valve body has a medium channel extending through it along its axial direction. One axial end of the medium channel is configured as a medium inlet, and the radial side of the medium channel is configured as a medium outlet. The indicator cap is detachably installed in the medium channel, with one end extending out of the valve body and having several steps arranged in a spiral stepped manner on its surface. The angle between two adjacent steps is α and the vertical distance is b. A sealing sleeve is slidably disposed inside the indicator gland, with one end abutting against the medium inlet; The adjusting cap is threadedly connected to the indicating cap. When the adjusting cap rotates through ∠α, the adjusting cap moves a distance of b. A spring is located inside the indicator cover, with one end abutting against the sealing sleeve and the other end abutting against the adjustment cover; The indicator cap, sealing sleeve, and adjusting cap are arranged coaxially.

[0005] Furthermore, the valve body also includes: The first connector is located at one axial end of the valve body, and the medium inlet corresponds to the first connector.

[0006] Furthermore, a first flange is provided at the bottom of the first joint.

[0007] Furthermore, the valve body also includes: The second connector is located on the side of the valve body, and the medium outlet corresponds to the second connector.

[0008] Furthermore, it also includes: A positioning hole is provided on the side of the valve body; Fasteners penetrate the positioning hole and press the indicator cap.

[0009] Furthermore, it also includes: A rubber gasket is provided at the bottom of the sealing sleeve; The countersunk bolts are used to fix the rubber gasket onto the sealing sleeve.

[0010] Furthermore, the top surface of the adjusting cover is provided with an external hexagonal block.

[0011] Advantages of this utility model: By using steps and adjusting the pressure cap, the adjustment amount can be directly obtained by adjusting the angle of the pressure cap in a single rotation, avoiding errors caused by estimation based on experience; The first connector, first flange, and second connector facilitate the connection of the pressure relief valve to the upstream and downstream pipelines. The positioning holes and fasteners facilitate the installation and removal of the gland and valve body. Rubber gaskets and countersunk bolts facilitate the replacement of worn rubber gaskets, ensuring the sealing of the medium inlet. The external hexagonal block allows for easy adjustment of the pressure cap's rotation using tools such as wrenches. The adjustment range can be directly obtained by using the side of the wrench against the side of the step. Attached Figure Description

[0012] Figure 1 This is a first-person exploded view of the present invention.

[0013] Figure 2 This is a second-view exploded view of the present invention.

[0014] Figure 3 This is an assembly drawing of the present invention.

[0015] Figure 4 This is a cross-sectional view of the present invention.

[0016] In the diagram: 10-valve body, 100-medium passage, 110-first connector, 111-medium inlet, 120-second connector, 121-medium outlet, 130-positioning hole, 140-first flange, 20-indicating gland, 210-step, 30-sealing sleeve, 310-rubber gasket, 320-countersunk bolt, 40-adjusting gland, 410-hexagonal block, 50-spring, 60-fastener. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] Please see the appendix Figure 1 - Appendix Figure 4 This application proposes a pressure relief valve with a spiral marking, comprising: a valve body 10, with a medium channel 100 extending through it along its axial direction, one axial end of the medium channel 100 being configured as a medium inlet 111, and one radial side of the medium channel 100 being configured as a medium outlet 121; and an indicator cap 20, detachably disposed within the medium channel 100, one end of which extends out of the valve body 10 and has a plurality of steps 210 spirally stepped on its surface, the angle between two adjacent steps 210 being α. The vertical distance is b; the sealing sleeve 30 is slidably disposed inside the indicating cover 20, with one end abutting against the medium inlet 111; the adjusting cover 40 is threadedly connected to the indicating cover 20, and when the adjusting cover 40 rotates through ∠α, the adjusting cover 40 moves a distance of b; the spring 50 is located inside the indicating cover 20, with one end abutting against the sealing sleeve 30 and the other end abutting against the adjusting cover 40; wherein, the indicating cover 20, the sealing sleeve 30 and the adjusting cover 40 are arranged coaxially.

[0019] As attached Figure 3 and attached Figure 4 As shown, the opening process of the pressure relief valve is as follows: the medium exerts upward pressure on the sealing sleeve 30 from the medium inlet 111. When the pressure is greater than the elastic force of the spring 50, the sealing sleeve 30 moves along the inner wall of the indicator cover 20 until the pressure is balanced, the medium inlet 111 opens, and the medium flows through the medium inlet 111-medium channel 100-medium outlet 121 through the pressure relief valve to achieve the pressure relief action. When the medium pressure gradually decreases to less than the elastic force of the spring 50, the sealing sleeve 30 moves along the inner wall of the indicator cover 20 to block the medium inlet 111, the medium inlet 111 closes, and the pressure relief is completed.

[0020] In this application, several spiral-stepped steps 210 are connected end to end and surround the valve in a 360° circle. The size of ∠α varies depending on the number of steps 210, and consequently the size of b also changes. For example, when α=30° and b=0.5mm, each rotation of one step angle changes the stroke of the pressure cap 40 by 0.5mm, and the elastic force of the spring 50 changes accordingly, thereby directly controlling the movement distance of the sealing sleeve 30. The opening pressure threshold of the pressure relief valve is accurate to the level of 0.1 bar, which is significantly better than the ±1 bar adjustment accuracy of the traditional spring-type pressure relief valve.

[0021] Furthermore, to facilitate the rotation of the adjusting cover 40, an external hexagonal block 410 is provided on the top surface of the adjusting cover 40. Using a wrench or other tool to hold the external hexagonal block 410, the wrench handle slides along the bottom surface of the step 210 until it contacts the side of the next step 210, indicating that the adjusting cover 40 has completed its position adjustment. The external hexagonal block 410 allows the tool to be separated from the adjusting cover 40, preventing accidental operation of the adjusting cover 40.

[0022] To facilitate connection of the pressure relief valve with upstream and downstream pipelines, the valve body 10 further includes a first connector 110 and a second connector 120. The first connector 110 is located at one axial end of the valve body 10, and the medium inlet 111 corresponds to the first connector 110. The second connector 120 is located on the side of the valve body 10, and the medium outlet 121 corresponds to the second connector 120. (See attached diagram) Figure 4 Taking the positional relationship as an example, the medium inlet 111 is located inside the first connector 110, and the medium outlet 121 is located inside the second connector 120.

[0023] To further facilitate the connection of the pressure relief valve to upstream and downstream pipelines, a first flange 140 is provided at the first connector 110; the outer surface of the second connector 120 is machined with external threads. The first connector 110 is fixed to the flange on the upstream pipeline through the through hole on the first flange 140, and the second connector 120 is connected to the internal thread or threaded connector on the downstream pipeline through the external thread, thereby realizing the installation of the pressure relief valve in the pipeline.

[0024] To achieve a detachable connection of the indicator gland 20 to the valve body 10, please refer to the appendix. Figure 1 and attached Figure 2 The application also includes: a positioning hole 130 disposed on the side of the valve body 10; and a fastener 60 that passes through the positioning hole 130 and presses against the indicator cap 20.

[0025] In one embodiment, the fastener 60 is a pin and the positioning hole 130 is a pin hole. The indicator cover 20 is provided with a corresponding pin hole. When the pin is inserted into the two pin holes in sequence, the position of the indicator cover 20 inside the valve body 10 is fixed at all times. The indicator cover 20 will not rotate with the rotation of the adjustment cover 40. When disassembling, first pull out the pin and then pull out the indicator cover 20.

[0026] In another embodiment, the fastener 60 is a screw, the positioning hole 130 is a threaded hole, the surface of the indicator cover 20 is machined with threads corresponding to the inner wall of the valve body 10, the indicator cover 20 is initially installed by the threaded connection between the indicator cover 20 and the valve body 10, and then the screw is screwed into the positioning hole 130 to press the indicator cover 20 to fix its position. When disassembling, first remove the screw, and then rotate the indicator cover 20 in the opposite direction.

[0027] In another embodiment, the fastener 50 is a screw, the positioning hole 130 is a threaded hole, and the indicator cover 20 is interference-fitted with the medium channel 100 on the valve body 10 to achieve a tight fit between the indicator cover 20 and the valve body 10. During installation, the indicator cover 20 is inserted from top to bottom with force, and the screw is tightened to further press the indicator cover 20. During disassembly, the screw is removed first, and then the indicator cover 20 is pushed out from bottom to top with reverse force.

[0028] To ensure the sealing effect of the sealing sleeve 30 on the medium inlet 111, this application further includes: a rubber gasket 310 disposed at the bottom of the sealing sleeve 30; and a countersunk bolt 320 for fixing the rubber gasket 310 to the sealing sleeve 30. A threaded hole for tightening the countersunk bolt 320 is provided at the center of the bottom of the sealing sleeve 30. The elasticity of the rubber gasket 310 allows for tight contact with the medium inlet 111. When the rubber gasket 310 becomes loose or damaged, a new rubber gasket 310 can be replaced by removing the countersunk bolt 320.

[0029] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pressure relief valve with a spiral mark, characterized in that, include: The valve body (10) has a medium channel (100) extending through it along its axial direction. One axial end of the medium channel (100) is configured as a medium inlet (111), and the radial side of the medium channel (100) is configured as a medium outlet (121). The indicator cap (20) is detachably installed in the medium channel (100), with one end extending out of the valve body (10) and a number of steps (210) arranged in a spiral step shape on its surface. The angle between two adjacent steps (210) is α and the vertical distance is b. The sealing sleeve (30) is slidably disposed inside the indicator cap (20), with one end abutting against the medium inlet (111); Adjusting cap (40) is threadedly connected to the indicating cap (20). When the adjusting cap (40) rotates through ∠α, the adjusting cap (40) moves a distance of b. A spring (50) is located inside the indicator cover (20), with one end abutting against the sealing sleeve (30) and the other end abutting against the adjustment cover (40). The indicator cap (20), sealing sleeve (30) and adjusting cap (40) are arranged coaxially.

2. The pressure relief valve with spiral markings as described in claim 1, characterized in that, The valve body (10) also includes: The first connector (110) is located at one axial end of the valve body (10), and the medium inlet (111) corresponds to the first connector (110).

3. The pressure relief valve with spiral markings as described in claim 2, characterized in that: A first flange (140) is provided at the first joint (110).

4. The pressure relief valve with spiral markings as described in claim 1, characterized in that, The valve body (10) also includes: The second connector (120) is located on the side of the valve body (10), and the medium outlet (121) corresponds to the second connector (120).

5. The pressure relief valve with spiral markings as described in claim 1, characterized in that, Also includes: A positioning hole (130) is provided on the side of the valve body (10); Fastener (60) passes through the positioning hole (130) and presses against the indicator cap (20).

6. The pressure relief valve with spiral markings as described in claim 1, characterized in that, Also includes: A rubber gasket (310) is disposed at the bottom of the sealing sleeve (30); The countersunk bolt (320) secures the rubber gasket (310) to the sealing sleeve (30).

7. The pressure relief valve with spiral markings as described in claim 1, characterized in that: The top surface of the adjusting cover (40) is provided with an external hexagonal block (410).

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