Electromagnetic quick-closing valve

Abstract

The utility model discloses an electromagnetic quick-closing valve, and particularly relates to the field of valves, which comprises a check valve casing and is characterized in that a valve cover is arranged at the top of the check valve casing, the top of the valve cover is connected with a first support column through a bolt, and a first support plate and a second support plate are sequentially arranged on the outer wall of the first support column. A travel switch is arranged at the bottom of the second supporting plate, a second supporting column is arranged at the top of the first supporting column, and a suction block supporting plate and an electromagnet supporting plate are sequentially arranged on the outer wall of the second supporting column. And response is fast, the electromagnet quick-closing valve can respond to a control signal within a very short time, and quick opening and closing are achieved. When a fluid channel needs to be cut off immediately in an emergency situation of the system, the device can act quickly, and influence and loss of accidents are reduced to the maximum extent. For example, in industrial production, once dangerous pressure or flow anomalies are detected, the electromagnet quick-closing valve can be closed within the millisecond level, and danger is prevented from being further expanded.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to an electromagnetic quick-closing valve. Background Technology

[0002] In many large industrial equipment and systems, such as steam turbines and large compressors, rapid and reliable control and shut-off of working media (such as steam, gas, and liquid) are required. Quick-closing valves can meet the stringent fluid control requirements of these devices under different operating conditions, including startup, normal operation, and emergency shutdown, ensuring safe and stable operation and improving production efficiency and quality. For example, in steam turbine systems in the power industry, quick-closing valves are used to control the entry of steam into the turbine, ensuring normal turbine operation and rapid shutdown in emergencies. Existing quick-closing valves are controlled by electric or hydraulic actuators, with pneumatic actuators sending signals for control.

[0003] The existing electric quick-closing valves have the following disadvantages: a. Unstable response speed: They are greatly affected by changes in ambient temperature. Under extreme temperature conditions, their response speed may fluctuate. For example, in low-temperature environments, the electric actuator may become sluggish, and the response time may extend from a few seconds to tens of seconds or even longer. b. Relatively low reliability: Electric actuators contain more electronic components, making them more complex than traditional mechanical valves and prone to failure. For example, electronic components may malfunction due to electromagnetic interference. Their mean time between failures (MTBF) may be around several thousand to ten thousand hours, which is lower than some highly reliable mechanical valves. c. Energy dependence: They require a stable power supply to operate normally. In the event of a power outage or other power failure, the valve will not operate normally, potentially leading to system interruption or safety hazards. d. When a fault occurs, specialized technicians are required to diagnose and repair the electronic control system using specialized testing equipment. The cost of spare parts and labor for repairs is relatively high. e. Limited operational accuracy: Although a certain degree of automatic control can be achieved, there may be some error in the precise control of valve opening. The error range is usually within a few percent to a few tenths of the opening degree.

[0004] Disadvantages of existing hydraulic quick-closing valves: a. Strict requirements for the cleanliness of hydraulic oil: If the hydraulic oil contains impurities, particles or water, it may cause wear, jamming or damage to the precision parts inside the valve (such as valve core, valve seat, seals, etc.), thereby affecting the normal operation and performance of the quick-closing valve. For example, when particles enter the gap between the valve core and the valve seat, they may scratch the surface, resulting in poor sealing, or even prevent the valve from closing or opening normally. b. Requirements for the viscosity of hydraulic oil: Hydraulic oil with unsuitable viscosity will affect the valve's action response speed and control accuracy. If the viscosity is too high, the flow resistance of the hydraulic oil in the valve will increase, resulting in slow valve action and longer response time; if the viscosity is too low, it may not be able to provide sufficient lubrication and sealing performance, which will also affect the normal operation of the valve. c. Potential leakage problems: (1) Internal leakage: The seals inside the valve may wear, age or be damaged during long-term use, causing hydraulic oil to leak from the high-pressure chamber to the low-pressure chamber inside the valve. This will not only reduce the working efficiency of the quick-closing valve, but may also affect the normal operation of other parts of the system. For example, in some critical safety protection systems, internal leakage may cause the quick-closing valve to fail to close quickly in an emergency, thus causing a safety accident. (2) External leakage: There may also be leakage problems at the connection between the quick-closing valve and external pipelines or equipment, which may be caused by poor sealing, improper installation or loose connection parts. External leakage will not only waste hydraulic oil, but also pollute the environment, and may even cause dangerous situations such as fire. d. Sensitive to temperature changes: The performance of hydraulic oil is affected by temperature. Under different temperature conditions, the viscosity, fluidity and other characteristics of hydraulic oil will change. For example, in low temperature environment, the viscosity of hydraulic oil will increase, which may cause the quick-closing valve to become slow or even fail to work properly; while in high temperature environment, the viscosity of hydraulic oil will decrease, and the seals and other components are also prone to aging and damage, thereby increasing the risk of leakage. e. Complexity of hydraulic system: If the hydraulic system contains more pipes, elbows, throttle valves and other components, it will increase the flow resistance and pressure loss of hydraulic oil, thereby slowing down the response speed of the quick-closing valve. f. Cylinder size and performance: The size of the cylinder, the piston's movement speed, and internal friction all affect the opening and closing speed of the quick-closing valve. g. High technical requirements: Maintenance and repair of hydraulic quick-closing valves require specialized technicians with extensive knowledge and experience in hydraulic systems to accurately diagnose and resolve problems. This increases the company's human resource costs. h. High component costs: The components of hydraulic quick-closing valves are typically precision-engineered and complex to manufacture, resulting in relatively high costs. For example, key components such as the valve core, valve seat, and seals can be expensive, and in some special applications, imported high-quality components may be necessary, further increasing maintenance costs.

[0005] Disadvantages of existing pneumatic quick-closing valves: a. The normal operation of pneumatic quick-closing valves is highly dependent on a stable air supply. Fluctuations in air supply pressure can lead to unstable valve operation. For example, when the air supply pressure suddenly drops, the valve's closing speed may slow down or even fail to close completely, affecting system safety. In some applications requiring extremely high valve response speed, such as emergency shut-off systems, this instability can lead to serious consequences. b. The quality of the air supply is also crucial. If the compressed air contains moisture, oil, or impurities, it may damage the pneumatic components inside the valve, such as clogging air holes or corroding seals, thereby reducing the valve's service life and performance. c. The operating speed of the pneumatic actuator is affected by various factors, such as air supply pressure, air pipe diameter, and valve structure. Compared to some electrically or hydraulically driven valves, the response speed of pneumatic quick-closing valves may be relatively slow. In some emergency situations requiring rapid response, this may become a potential risk factor. d. During the opening and closing process of pneumatic valves, due to the compressibility of gas, a certain buffering effect may occur, resulting in a certain delay and lag in valve operation, affecting its precise control. e. Pneumatic components are relatively complex, including cylinders, pistons, seals, solenoid valves, and other parts. A malfunction in any of these components can affect the normal operation of the valve. For example, worn seals require periodic replacement, and the repair and replacement costs for some high-precision pneumatic components are high. f. Maintenance personnel also require a high level of technical expertise, needing to be familiar with the working principles and maintenance techniques of pneumatic systems. This increases the company's labor and training costs. g. Noise levels are high. During valve operation, the high-speed flow of gas and the operation of pneumatic components generate significant noise. This not only causes noise pollution in the working environment, affecting the physical and mental health of workers, but may also restrict operation in places with strict noise requirements, such as hospitals and laboratories. To reduce noise, additional silencers may need to be installed, further increasing costs and system complexity. h. The performance of pneumatic components may be affected by extreme temperatures. For example, at low temperatures, sealing materials may harden and become brittle, leading to decreased sealing performance; at high temperatures, pneumatic components may overheat, affecting their service life and reliability.

[0006] Therefore, an electromagnetic quick-closing valve is proposed to address the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an electromagnetic quick-closing valve, primarily solving the problem of achieving a one-second quick-closing function on the steam turbine intake pipe to rapidly cut off the flow of fluid media and prevent further escalation of accidents. This quick-closing valve design relies on a custom-designed electromagnet to achieve the quick-closing effect. This patent is specifically applied to steam turbines. It primarily solves the problem of achieving a one-second quick-closing function on the steam turbine intake pipe to rapidly cut off the flow of fluid media and prevent further escalation of accidents. Compared with commercially available quick-closing valves, this design has a simpler structure, is easier to assemble, has lower manufacturing costs, faster quick-closing response, lower energy dependence (only requiring electricity), lower environmental requirements (it can operate in harsh environments), higher stability, lower maintenance costs, and lower skill requirements for operators.

[0008] To achieve the above objectives, this utility model provides the following technical solution: the electromagnetic quick-closing valve includes a check valve housing, characterized in that: a valve cover is provided on the top of the check valve housing; the top of the valve cover is bolted to a first support column; a first support plate and a second support plate are sequentially provided on the outer wall of the first support column; a limit switch is provided at the bottom of the second support plate; a second support column is provided on the top of the first support column; a suction block support plate and an electromagnet support plate are sequentially provided on the outer wall of the second support column; a third support plate is screwed to the top of the second support column; and a rotary plug passes through the top of the third support plate. A screw rod passes through the top of the rotary plug, and a handwheel is fixedly connected to the outer wall of the screw rod. The top of the third support plate is connected to a bearing cap by screws, and a rolling bearing is embedded in the bottom of the bearing cap. An electromagnet is installed at the bottom of the electromagnet support plate. A suction block is installed at the top of the suction block support plate. A spring is installed at the bottom of the second support plate. A spring seat is installed at the bottom of the suction block. A connecting rod is installed at the bottom of the spring seat. A sealing cap, a graphite ring, and a sealing ring are sequentially installed on the outer wall of the connecting rod. A steam collecting pipe is installed on the outer wall of the connecting rod. The bottom of the connecting rod is connected to a valve core by screws, and a filter screen is sleeved on the outside of the valve core.

[0009] As a preferred embodiment, the No. 3 support plate and the screw form a threaded engagement structure, and the vertical axis of the screw coincides with the vertical axis of the handwheel.

[0010] As a preferred embodiment, the No. 1 support plate and the No. 1 pillar form a through structure, and the No. 1 support plate and the No. 1 pillar form a sliding structure through a spring seat.

[0011] As a preferred embodiment, the valve core forms a telescopic structure with the check valve housing via a connecting rod and a spring seat.

[0012] Compared with the prior art, the present invention provides an electromagnetic quick-closing valve, which has the following beneficial effects.

[0013] With its rapid response, the electromagnet-operated quick-closing valve can respond to control signals in an extremely short time, achieving rapid opening and closing. When an emergency occurs that requires immediate shut-off of fluid flow, it can act swiftly to minimize the impact and losses of the accident. For example, in industrial production, once a dangerous pressure or flow anomaly is detected, the electromagnet-operated quick-closing valve can close within milliseconds, preventing the danger from escalating further.

[0014] Because electromagnets have relatively stable operating characteristics and are not affected by external environmental factors (such as temperature, humidity, air pressure, etc.), electromagnet quick-closing valves have relatively high control accuracy and can maintain a stable working state for a long time.

[0015] It boasts high reliability and a relatively simple structure, primarily composed of components such as an electromagnet, valve body, and valve core. The absence of complex mechanical transmission mechanisms reduces the probability of malfunctions. Furthermore, the electromagnet's working principle is mature and reliable, having undergone long-term practical testing, demonstrating high stability and durability.

[0016] The valve body and valve core are designed with excellent sealing performance, which can effectively prevent fluid leakage and ensure the safe operation of the system.

[0017] With a high degree of automation, it is easy to integrate with automated control systems and can be remotely controlled and monitored via computers, PLCs, and other devices. This enables the electromagnet-based quick-closing valve to achieve intelligent operation, improving production efficiency and management level.

[0018] Easy to install and maintain, small in size and light in weight, requiring minimal space during installation and facilitating installation and layout in various settings. Furthermore, the connection method of the electromagnet quick-closing valve is typically simple, allowing for quick and convenient assembly via threads.

[0019] Maintenance costs are low, and due to its simple structure, troubleshooting is relatively easy. Maintenance only requires inspection and repair of major components such as the electromagnet, valve body, and valve core; no complex tools or equipment are needed. Furthermore, some common faults, such as damaged electromagnet coils or stuck valve cores, can be resolved by replacing parts or simple cleaning and maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the valve opening of this utility model.

[0022] In the diagram: 1. Check valve body; 2. Valve cover; 3. Support column 1; 4. Steam collecting pipe; 5. Support plate 1; 6. Support plate 2; 7. Suction block support plate; 8. Support column 2; 9. Electromagnet support plate; 10. Support plate 3; 11. Handwheel; 12. Screw; 13. Rotary plug; 14. Bearing cover; 15. Rolling bearing; 16. Electromagnet; 17. Suction block; 18. Spring; 19. Spring seat; 20. Sealing cover; 21. Graphite ring; 22. Sealing ring; 23. Connecting rod; 24. Valve core; 25. Filter screen cylinder; 26. Limit switch. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-2This utility model relates to an electromagnetic quick-closing valve, comprising a check valve housing 1. The valve housing 1 has a valve cover 2 at its top, and a first support column 3 is bolted to the top of the valve cover 2. A first support plate 5 and a second support plate 6 are sequentially arranged on the outer wall of the first support column 3. A limit switch 26 is installed at the bottom of the second support plate 6. A second support column 8 is installed at the top of the first support column 3. A suction block support plate 7 and an electromagnet support plate 9 are sequentially arranged on the outer wall of the second support column 8. A third support plate 10 is screwed to the top of the second support column 8. A rotary plug 13 passes through the top of the third support plate 10, and a screw 12 passes through the top of the rotary plug 13. A handwheel 11 is fixedly connected to the outer wall of the screw 12. A bearing cover 14 is screwed to the top of the third support plate 10, and a rolling bearing 15 is embedded at the bottom of the bearing cover 14. An electromagnet is installed at the bottom of the electromagnet support plate 9. 16. A suction block 17 is installed on the top of the suction block support plate 7. A spring 18 is installed at the bottom of the second support plate 6. A spring seat 19 is installed at the bottom of the suction block 17. A connecting rod 23 is installed at the bottom of the spring seat 19. A sealing cap 20, a graphite ring 21, and a sealing ring 22 are installed sequentially on the outer wall of the connecting rod 23. A steam collecting pipe 4 is installed on the outer wall of the connecting rod 23. The bottom of the connecting rod 23 is connected to the valve core 24 by screws. A filter screen 25 is sleeved on the outside of the valve core 24. A threaded engagement structure is formed between the third support plate 10 and the screw 12. The vertical axis of the screw 12 coincides with the vertical axis of the handwheel 11. A through structure is formed between the first support plate 5 and the first support column 3. A sliding structure is formed between the first support plate 5 and the first support column 3 through the spring seat 19. A telescopic structure is formed between the valve core 24 and the check valve housing 1 through the connecting rod 23 and the spring seat 19.

[0027] Specifically: When the valve is opened, the electromagnet 16 and the suction block 17 are in contact. During the contact process, the spring seat 19 and the connecting rod 23 are driven to rise. During the rise, the position of the valve core 24 is raised, allowing the check valve body 1 to flow. When it is necessary to close the flow of the check valve body 1, the electromagnet 16 is de-energized. After the de-energization, the attraction between the suction block 17 and the electromagnet 16 is lost, and the spring 1 extends, popping out the first support plate 5 and the spring seat 19. During the popping process, the spring seat 19 drives the connecting rod 23 and the valve core 24 to press down, closing the check valve body 1, thus achieving rapid opening and closing.

[0028] The working principle of this utility model is as follows: the handwheel 11 is connected to the electromagnet 16 through the screw 12, and the suction block 17 is connected to the valve core 24 through the spring seat 19, the connecting rod 13 and the bolt. The quick-closing valve opening steps are as follows: first, turn the handwheel 11 counterclockwise to make the electromagnet 16 fall and contact the suction block 17. When the electromagnet 16 is energized, it generates a magnetic force to attract the lower suction block 17. Then, after the electromagnet 16 attracts the suction block 17, manually turn the handwheel 11 clockwise to drive the valve core 24 to move upward. When the first support plate 5 touches the limit switch 26, stop turning the handwheel 11. The spring 18 is located between the first support plate 5 and the upper fixed plate. When the first support plate 5 moves upward, the spring 18 is in a compressed state, the valve is in an open state, and the steam in the pipeline enters the steam turbine through the quick-closing valve, and the steam turbine starts to operate.

[0029] The electromagnet 16 is connected to the control cabinet. In case of an emergency, the electromagnet 16 will lose power and lose its magnetic force instantly. At this moment, the spring 18 will lose its clamping force and begin to rebound, causing the valve core 24 to descend rapidly under the action of gravity and elasticity, achieving the effect of quick closing.

[0030] In this design, a filter screen 25 is added inside the valve body to prevent impurities carried by the pipeline steam from entering the equipment. Multiple sealing rings 22 are placed inside the sealing cover 20. The sealing rings 22 have grooves inside and are pressed together by graphite rings 21 to seal the steam, so that the connecting rod 23 will not leak a lot of steam during the up and down movement. A hole is opened in the middle of the sealing ring 22 to connect to the steam collecting pipe 4 so that the steam leaking from the quick-closing valve can be collected by the pipe for centralized cooling. Since the quick-closing valve is in the open state when the steam turbine unit is running normally, that is, the solenoid valve needs to be energized all the time, which will cause heat generation. Therefore, multiple thin plates are welded on the suction block 17 as heat sinks to disperse the heat generated by the electromagnet 16 during long-term operation.

[0031] During normal operation, the steam intake can be adjusted by turning the handwheel 11. In case of emergency, if the electromagnet 16 fails to cut off the power, the operator can also manually turn the handwheel 11 counterclockwise to close the quick-closing valve.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An electromagnetic quick-closing valve, comprising a check valve housing (1), characterized in that: The top of the check valve housing (1) is provided with a valve cover (2). The top of the valve cover (2) is connected to a first support column (3) by bolts. The outer wall of the first support column (3) is provided with a first support plate (5) and a second support plate (6) in sequence. The bottom of the second support plate (6) is provided with a limit switch (26). The top of the first support column (3) is provided with a second support column (8). The outer wall of the second support column (8) is provided with a suction block support plate (7) and an electromagnet support plate (9) in sequence. The top of the second support column (8) is connected to a third support plate (10) by screws. The top of the third support plate (10) passes through a rotary plug (13). The top of the rotary plug (13) passes through a screw rod (12). The outer wall of the screw rod (12) is fixedly connected to a handwheel (11). The third support plate (10) The top of the bearing cover (14) is connected to the bearing cover (14) by screws. The bottom of the bearing cover (14) is embedded with a rolling bearing (15). The bottom of the electromagnet support plate (9) is provided with an electromagnet (16). The top of the suction block support plate (7) is provided with a suction block (17). The bottom of the second support plate (6) is provided with a spring (18). The bottom of the suction block (17) is provided with a spring seat (19). The bottom of the spring seat (19) is provided with a connecting rod (23). The outer wall of the connecting rod (23) is provided with a sealing cover (20), a graphite ring (21) and a sealing ring (22) in sequence. The outer wall of the connecting rod (23) is provided with a steam collecting pipe (4). The bottom of the connecting rod (23) is connected to the valve core (24) by screws. The valve core (24) is covered with a filter screen (25).

2. The electromagnetic quick-closing valve according to claim 1, characterized in that: The No. 3 support plate (10) and the screw (12) form a threaded engagement structure, and the vertical axis of the screw (12) coincides with the vertical axis of the handwheel (11).

3. The electromagnetic quick-closing valve according to claim 1, characterized in that: The first support plate (5) and the first pillar (3) form a through structure, and the first support plate (5) and the first pillar (3) form a sliding structure through the spring seat (19).

4. The electromagnetic quick-closing valve according to claim 1, characterized in that: The valve core (24) forms a telescopic structure with the check valve housing (1) through the connecting rod (23) and the spring seat (19).

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