Safety valve and valve safety warning system

Abstract

The application discloses a safety valve and a valve safety early warning system, and belongs to the technical field of valve intelligent control systems, and comprises a sealing assembly, a length measuring assembly, a pressure measuring assembly, a force relieving assembly and a data processing unit. The compression length of the first spring, fluid inflow pressure and outflow pressure are monitored and calculated, so that in the case that the fluid pressure is excessively large, the first spring cannot fail due to long-time over-compression, early warning can be given to the user in the first time, and the safety of the valve and the pipeline can be ensured.

Description

Technical Field

[0001] This invention discloses a safety valve and a valve safety early warning system, belonging to the technical field of intelligent valve control systems. Background Technology

[0002] A safety valve is a special valve whose opening and closing element is normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above a specified value, it discharges the medium to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. Safety valves belong to the category of automatic valves and are mainly used on pressure vessels and pipelines to control the safety pressure of the corresponding vessels to not exceed the specified value, playing an important role in protecting personal safety and equipment operation. However, in the opening process of existing safety valves, the greater the pressure at the inflow end of the pipeline, the greater the movement distance of the valve core after opening. The spring acting on the valve core is compressed to a greater length. To avoid spring failure and thus ensure the safety and reliability of valve operation, the overall compression length ratio of the spring should be controlled within a reasonable range. Therefore, it is necessary to monitor the compression state of the spring in real time and, under overpressure conditions, relieve the force on the spring and issue a warning. However, such technology is not currently publicly available in safety valves. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide a safety valve and a valve safety early warning system.

[0004] This invention achieves the above objectives through the following technical solution: a safety valve and a valve safety early warning system, comprising:

[0005] A sealing assembly for controlling the fluid flow state within a safety valve, the sealing assembly including a valve core and a first spring, the first spring applying a force to the valve core to close the safety valve, the original length of the first spring being L1;

[0006] A length measuring component, used to measure the final length L2 of the first spring after compression in real time;

[0007] A pressure measurement component for real-time measurement of the pressure P1 at the fluid inlet and the pressure P2 at the fluid outlet.

[0008] A force-relieving assembly is used to relieve the force on a first spring. The force-relieving assembly includes an air supply system, a pressure chamber, a piston, and a second spring. The piston is slidably disposed in the pressure chamber. The force exerted on the piston by the air supply system is opposite to that exerted by the second spring. A fixing ring for adjusting the movement distance of the valve core is fixedly installed on the piston. After the air supply system introduces gas into the pressure chamber to increase the pressure, it will reduce the movement distance of the valve core.

[0009] The data processing unit is coupled to the length measurement unit, the pressure measurement unit, and the gas supply system. The data processing unit is used to receive the values ​​of L1, L2, P1, and P2, and to calculate and judge these values. Specifically, when (L1-L2) / L1 > 0.4, the data processing unit sends an electrical signal to control the gas supply system to introduce gas into the pressure chamber to increase the pressure until (L1-L2) / L1 ≤ 0.4. The pressure difference ΔP = P1-P2 is calculated. If ΔP is greater than the set pressure value, a warning signal is sent to the user.

[0010] Preferably, the length measuring component includes an infrared transmitter and an infrared receiver, which are located at both ends of the first spring and move synchronously when the first spring is compressed.

[0011] Preferably, the pressure measurement component includes a first pressure sensor and a second pressure sensor.

[0012] A safety valve includes a valve safety detection system, a lower valve body, and an upper valve body. A valve seat is fixedly installed inside the lower valve body, and the valve seat is coaxially arranged with a valve core. The upper and lower valve bodies are fixedly connected by bolts. The measuring end of a first pressure sensor extends into the valve seat to measure the pressure P1 at the fluid inflow end. The measuring end of a second pressure sensor extends into the lower valve body to measure the pressure P2 at the fluid outflow end. An installation cavity is provided inside the upper valve body. The valve core includes a valve stem and a sealing sleeve. The valve stem is slidably disposed with respect to the upper valve body, and one end of the valve stem abuts against the sealing sleeve. One end of the sealing sleeve is slidably disposed within a fixing ring. A first spring is located within the installation cavity, and both ends of the first spring are... A pressure block is provided, and the valve stem passes through two pressure blocks. The infrared transmitter and infrared receiver are respectively installed on the two pressure blocks. The pressure chamber has an annular structure and is located in the upper valve body. A pressure cover for sealing the pressure chamber is provided on the upper valve body. The piston is slidably disposed in the pressure chamber, and multiple push rods are arranged in an array on the piston. The push rods pass through the upper valve body and are fixedly connected to the fixing ring by bolts. The air supply system includes an air pump, an air inlet valve, an air inlet nozzle, an air outlet nozzle, and an air outlet valve. The air inlet nozzle and the air outlet nozzle are both installed on the pressure cover. The air inlet valve is connected to the air pump and the air inlet nozzle through a pipe. The air outlet valve is connected to the air inlet nozzle through a pipe. The second spring is sleeved on the outside of the push rod.

[0013] Preferably, limit posts are provided on both sides of the piston, a gasket and a first sealing ring are provided at the connection between the push rod and the upper valve body, the gasket is located between the second spring and the first sealing ring, and a second sealing ring is provided between the upper valve body and the lower valve body.

[0014] Preferably, the upper valve body is provided with an adjusting component for adjusting the spring force of the first spring. The adjusting component includes a limiting sleeve and a screw. The limiting sleeve is threadedly connected to the upper valve body, and the screw is located inside the limiting sleeve and threadedly connected to the limiting sleeve. The pressing block located at the upper end abuts against the screw.

[0015] Preferably, the valve stem is provided with a wire hole, and the limiting sleeve is provided with an alarm.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By setting up length measuring components and pressure measuring components, the final length of the first spring after compression, as well as the pressure at the fluid inlet and outlet, are measured respectively. The data is then processed by the data processing unit to control the unloading component to unload the first spring, so that its length compression ratio is less than or equal to 0.4. At the same time, the pressure difference between the fluid inlet and outlet is used to provide early warning, thus ensuring the safety and reliability of the safety valve and pipeline during operation. Attached Figure Description

[0018] Figure 1 This is a control principle diagram of a valve safety early warning system according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a safety valve according to the present invention;

[0020] Figure 3 This is a cross-sectional view of a safety valve according to the present invention;

[0021] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the piston, push rod, and retaining ring in this invention;

[0023] Figure 6 This is a schematic diagram of the upper valve body in this invention;

[0024] Reference numerals in the attached diagram: 1. Lower valve body; 2. Pressure cap; 3. Air inlet; 4. Alarm; 5. Exhaust nozzle; 6. Upper valve body; 7. Second pressure sensor; 8. First pressure sensor; 9. Valve seat; 10. Sealing sleeve; 11. Piston; 12. First spring; 13. Screw; 14. Limiting sleeve; 15. Valve stem; 16. Fixing ring; 17. Pressing block; 18. Infrared transmitter; 19. Wire hole; 20. Pressure chamber; 21. Second spring; 22. Push rod; 23. Gasket; 24. First sealing ring; 25. Limiting post; 26. Mounting cavity; 27. Infrared receiver. Detailed Implementation

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

[0026] like Figures 1-6 As shown, a valve safety early warning system includes:

[0027] A sealing assembly for controlling the fluid flow state within a safety valve. The sealing assembly includes a valve core and a first spring 12. The first spring 12 applies a force to the valve core to close the safety valve. The original length of the first spring 12 is L1.

[0028] A length measuring component is used to measure the final length L2 of the first spring 12 after compression in real time. The length measuring component includes an infrared transmitter 18 and an infrared receiver 27, which are located at both ends of the first spring 12 and move synchronously when the first spring 12 is compressed.

[0029] A pressure measurement component is used to measure the pressure P1 at the fluid inlet and the pressure P2 at the fluid outlet in real time. The pressure measurement component includes a first pressure sensor 8 and a second pressure sensor 7.

[0030] The unloading assembly is used to unload the first spring 12. The unloading assembly includes an air supply system, a pressure chamber 20, a piston 11, and a second spring 21. The piston 11 is slidably disposed in the pressure chamber 20. The air supply system and the second spring 21 exert opposite forces on the piston 11. A fixing ring 16 for adjusting the movement distance of the valve core is fixedly installed on the piston 11. After the air supply system introduces gas into the pressure chamber 20 to increase the pressure, it will reduce the movement distance of the valve core.

[0031] The data processing unit is coupled to the length measurement unit, the pressure measurement unit, and the gas supply system. The data processing unit is used to receive the values ​​of L1, L2, P1, and P2, and to calculate and judge these values. Specifically, when (L1-L2) / L1>0.4, the data processing unit sends an electrical signal to control the gas supply system to introduce gas into the pressure chamber 20 to increase the pressure until (L1-L2) / L1≤0.4. The pressure difference ΔP=P1-P2 is calculated. If ΔP is greater than the set pressure value, a warning signal is sent to the user.

[0032] A safety valve includes a valve safety detection system, a lower valve body 1, and an upper valve body 6. A valve seat 9 is fixedly installed inside the lower valve body 1, and the valve seat 9 is coaxially arranged with the valve core. The upper valve body 6 and the lower valve body 1 are fixedly connected by bolts. The measuring end of a first pressure sensor 8 extends into the valve seat 9 to measure the pressure P1 at the fluid inflow end. The measuring end of a second pressure sensor 7 extends into the lower valve body 1 to measure the pressure P2 at the fluid outflow end. An installation cavity 26 is provided inside the upper valve body 6. The valve core includes a valve stem 15 and a sealing sleeve 10. The valve stem 15 is slidably disposed with the upper valve body 6, and one end of the valve stem 15 abuts against the sealing sleeve 10. One end of the sealing sleeve 10 is slidably disposed within a fixing ring 16. A first spring 12 is located within the installation cavity 26, and both ends of the first spring 12 are provided with... The pressure block 17 and valve stem 15 are arranged through the two pressure blocks 17. The infrared transmitter 18 and infrared receiver 27 are respectively installed on the two pressure blocks 17. The pressure chamber 20 has an annular structure and is located inside the upper valve body 6. The upper valve body 6 is provided with a pressure cover 2 for sealing the pressure chamber 20. The piston 11 is slidably arranged inside the pressure chamber 20, and multiple arrayed push rods 22 are provided on the piston 11. The push rods 22 pass through the upper valve body 6 and are fixedly connected to the fixing ring 16 by bolts. The air supply system includes an air pump, an air inlet valve, an air inlet nozzle 3, an air outlet nozzle 5, and an air outlet valve. The air inlet nozzle 3 and the air outlet nozzle 5 are both installed on the pressure cover 2. The air inlet valve is connected to the air pump and the air inlet nozzle 3 through a pipe. The air outlet valve is connected to the air inlet nozzle 3 through a pipe. The second spring 21 is sleeved on the outside of the push rod 22.

[0033] Limiting posts 25 are provided on both sides of the piston 11. A gasket 23 and a first sealing ring 24 are provided at the connection between the push rod 22 and the upper valve body 6. The gasket 23 is located between the second spring 21 and the first sealing ring 24. A second sealing ring is provided between the upper valve body 6 and the lower valve body 1. The limiting posts 25 can limit the movement distance of the piston 11, which can ensure that the gas can smoothly enter the pressure chamber 20 to achieve the pressurization effect, and at the same time prevent the second spring 21 from being over-compressed. The force exerted by the second spring 21 on the gasket 23 is transmitted to the first sealing ring 24, which can deform the first sealing ring 24 and seal the connection between the push rod 22 and the upper valve body 6.

[0034] The upper valve body 6 is provided with an adjustment assembly for adjusting the elastic force of the first spring 12. The adjustment assembly includes a limiting sleeve 14 and a screw 13. The limiting sleeve 14 is threadedly connected to the upper valve body 6, and the screw 13 is located inside the limiting sleeve 14 and is threadedly connected to the limiting sleeve 14. The upper end of the pressure block 17 abuts against the screw 13. By rotating the screw 13, the position of the upper end pressure block 17 can be changed, thereby adjusting the elastic force of the first spring 12, so that the valve core can be adapted to the opening pressure of a larger fluid. The operation is simple and convenient.

[0035] The valve stem 15 is provided with a wire hole 19, which allows for easy connection of the infrared transmitter 18 and the infrared receiver 27 with a wire. The limit sleeve 14 is provided with an alarm 4, which is coupled to the data processing unit and can provide real-time alarm and timely notification to the user, or provide remote early warning via wireless communication.

[0036] Working principle: When the safety valve is closed, the initial compressed length of the first spring 12 remains constant. As the fluid inflow pressure P1 in the valve seat 9 increases, it overcomes the elastic force of the first spring 12, causing the sealing sleeve 10 to move. At this point, the safety valve opens. The opening range of the safety valve depends on the value of the fluid inflow pressure P1. The larger P1 is, the greater the compression of the first spring 12. Therefore, the infrared transmitter 18 and infrared receiver 27 need to measure the final length L2 of the first spring 12 in real time. The measurement principle is based on calculations performed according to the signal reception time. Once (L1-L2) / L1 > 0.4, it means that the first spring 12 is in an over-compressed state, and at this time... The unloading component immediately unloads the first spring 12. Specifically, the unloading process is achieved by controlling the air pump to work through the data processing unit and introducing gas into the pressure chamber 20 to increase the pressure. The air pressure pushes the piston 11 to move, which compresses the second spring 21. At the same time, the push rod 22 pushes the fixed ring 16 and the sealing sleeve 10 to move in the opposite direction of the force exerted by the fluid on the sealing sleeve 10. This increases the length of the first spring 12, thereby achieving the unloading effect, until (L1-L2) / L1≤0.4. At the same time, the pressure difference ΔP=P1-P2 is calculated. If ΔP is greater than the set pressure value, a warning signal is issued to the user, allowing the user to make timely adjustments to ensure the safety of the safety valve and pipeline. ΔP can be set according to the actual usage scenario.

[0037] In this embodiment, when the exhaust valve discharges the gas from the pressure chamber 20, the piston 11 and the retaining ring 16 are reset under the action of the second spring 21. In addition, when the gas pressure in the pressure chamber 20 reaches a certain value, the piston 11 can drive the retaining ring 16 to press the sealing sleeve 10 onto the valve seat 9, thereby closing the safety valve. In this way, the safety valve loses its fixed pressure relief effect and becomes a valve that needs to be opened manually, thus achieving the purpose of dual use.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve safety early warning system, characterized in that, include: A sealing assembly for controlling the fluid flow state within a safety valve, the sealing assembly includes a valve core and a first spring (12), the first spring (12) applying a force to the valve core to close the safety valve, the original length of the first spring (12) being L1; A length measuring component for real-time measurement of the final length L2 of the first spring (12) after compression; A pressure measurement component for real-time measurement of the pressure P1 at the fluid inlet and the pressure P2 at the fluid outlet. The unloading assembly is used to unload the first spring (12). The unloading assembly includes an air supply system, a pressure chamber (20), a piston (11), and a second spring (21). The piston (11) is slidably disposed in the pressure chamber (20). The force exerted by the air supply system on the piston (11) is opposite to that exerted by the second spring (21). A fixing ring (16) for adjusting the movement distance of the valve core is fixedly installed on the piston (11). After the air supply system pressurizes the gas in the pressure chamber (20), it will reduce the movement distance of the valve core. The data processing unit is coupled to the length measurement unit, the pressure measurement unit and the gas supply system. The data processing unit is used to receive the values ​​of L1, L2, P1 and P2 and to calculate and judge the values. The specific method is as follows: when (L1-L2) / L1>0.4, the data processing unit sends an electrical signal to control the gas supply system to introduce gas into the pressure chamber (20) to increase the pressure until (L1-L2) / L1≤0.4, and calculates the pressure difference ΔP=P1-P2. If ΔP is greater than the set pressure value, a warning signal is sent to the user.

2. The valve safety early warning system according to claim 1, characterized in that, The length measuring component includes an infrared transmitter (18) and an infrared receiver (27), which are located at both ends of a first spring (12) and move synchronously when the first spring (12) is compressed.

3. The valve safety early warning system according to claim 2, characterized in that, The pressure measurement assembly includes a first pressure sensor (8) and a second pressure sensor (7).

4. A safety valve, characterized in that, The valve safety early warning system as described in claim 3 further includes a lower valve body (1) and an upper valve body (6). A valve seat (9) is fixedly installed inside the lower valve body (1). The valve seat (9) is coaxially arranged with the valve core. The upper valve body (6) and the lower valve body (1) are fixedly connected by bolts. The measuring end of the first pressure sensor (8) extends into the valve seat (9) to measure the pressure P1 at the fluid inflow end. The measuring end of the second pressure sensor (7) extends into the lower valve body (1) to measure the pressure P2 at the fluid outflow end. An installation cavity (26) is provided inside the upper valve body (6). The valve core includes a valve stem (15) and a sealing sleeve (10). The valve stem (15) is slidably arranged with the upper valve body (6), and one end of the valve stem (15) abuts against the sealing sleeve (10). One end of the sealing sleeve (10) is slidably arranged in the fixing ring (16). The first spring (12) is located in the installation cavity (26), and both ends of the first spring (12) are provided with abutment. The valve stem (15) passes through two pressure blocks (17), and the infrared transmitter (18) and infrared receiver (27) are respectively installed on the two pressure blocks (17). The pressure chamber (20) has an annular structure and is located inside the upper valve body (6). The upper valve body (6) is provided with a pressure cap (2) for sealing the pressure chamber (20). The piston (11) is slidably disposed inside the pressure chamber (20), and the piston (11) is provided with multiple arrayed pushers. The push rod (22) passes through the upper valve body (6) and is fixedly connected to the fixing ring (16) by bolts. The air supply system includes an air pump, an air inlet valve, an air inlet nozzle (3), an air outlet nozzle (5) and an air outlet valve. The air inlet nozzle (3) and the air outlet nozzle (5) are both installed on the pressure cap (2). The air inlet valve is connected to the air pump and the air inlet nozzle (3) through a pipe. The air outlet valve is connected to the air inlet nozzle (3) through a pipe. The second spring (21) is sleeved on the outside of the push rod (22).

5. A safety valve according to claim 4, characterized in that, Limiting posts (25) are provided on both sides of the piston (11). A gasket (23) and a first sealing ring (24) are provided at the connection between the push rod (22) and the upper valve body (6). The gasket (23) is located between the second spring (21) and the first sealing ring (24). A second sealing ring is provided between the upper valve body (6) and the lower valve body (1).

6. A safety valve according to claim 4, characterized in that, The upper valve body (6) is provided with an adjustment component for adjusting the elastic force of the first spring (12). The adjustment component includes a limiting sleeve (14) and a screw (13). The limiting sleeve (14) is threadedly connected to the upper valve body (6). The screw (13) is located inside the limiting sleeve (14) and is threadedly connected to the limiting sleeve (14). The pressing block (17) located at the upper end abuts against the screw (13).

7. A safety valve according to claim 6, characterized in that, The valve stem (15) is provided with a wire hole (19), and the limit sleeve (14) is provided with an alarm (4).

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