Quick opening and closing type safety valve

Abstract

The utility model discloses a quick opening and closing type safety valve, which relates to the technical field of safety valves and comprises a valve seat and a valve cover, the valve cover is positioned on the valve seat, a valve rod is arranged in the valve cover, an adjusting nut is arranged at the upper end of the valve rod, and an electromagnetic coil mounted in the valve cover is arranged on the lower side of the adjusting nut. A spring located in the valve deck is arranged on the peripheral side of the valve rod, a guide sleeve is arranged in the valve seat and installed in the valve deck, and the lower end of the valve rod penetrates through the guide sleeve. Millisecond-level opening and closing of the valve clack and precise graded pressure relief are achieved through magnetic force driving, sudden drop of system pressure is avoided, the multi-stage stepped valve element is combined with the spiral flow channel to form centrifugal vortex, the surface of the valve element is actively washed, particulate matter deposition is effectively removed, flow resistance is reduced, the self-cleaning and wear-resisting characteristics are achieved, kinetic energy is buffered in cooperation with the damping ring, and the service life is prolonged. And the sealing structure is suitable for high-pressure, corrosive and particle-containing medium scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety valve technical field especially relates to a quick open-close type safety valve. BACKGROUND

[0002] Safety valve is a kind of valve for protecting equipment and system safety, mainly used to prevent pressure from exceeding set value, thereby avoiding equipment damage or accident, it is usually installed on pressure vessel, pipeline or other pressure-bearing equipment, when system pressure exceeds preset safety value, safety valve will automatically open, release excess pressure, ensure that system pressure recovers to safety range.

[0003] But traditional safety valve has following some problems, response speed is slow, relies on mechanical spring or gravity drive, open-close time is long, cannot satisfy the demand of high frequency or transient overpressure scene, pressure relief process is extensive, single-stage valve port design is easy to open instantly, causes system pressure to drop or equipment impact, increases security risk, traditional flow channel is easy to accumulate particles or scale, leads to valve jam, sealing failure, needs frequent maintenance. Therefore the utility model proposes a quick open-close type safety valve to solve the problems mentioned in the above background technology. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a quick open-close type safety valve.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A quick open-close type safety valve, including valve seat and bonnet, the bonnet is located on the valve seat, the valve rod is provided in the bonnet, the adjusting nut is provided on the upper end of the valve rod, the electromagnetic coil is installed in the bonnet below the adjusting nut, the spring is provided on the valve rod side in the bonnet, the guide sleeve is provided in the valve seat, the guide sleeve is installed in the bonnet, the valve rod lower end penetrates the guide sleeve, and the valve flap is fixed on the lower side of the guide sleeve on the valve rod lower end, the stepped valve core corresponding to the valve flap is provided in the valve seat.

[0007] Preferably, the stepped valve core sets up the multistage valve port corresponding to the valve flap, and the valve port diameter increases successively from top to bottom.

[0008] Preferably, the spiral flow channel is provided between the stepped valve core and the valve seat, and the spiral flow channel surface is coated with wear-resistant coating.

[0009] Preferably, the permanent magnet is installed on the valve rod lower end, the permanent magnet is located on the upper end of the valve flap, the adjusting ring is installed in the valve seat on the periphery of the valve flap, and the backflush disc is installed in the valve seat on the lower side of the adjusting ring.

[0010] Preferably, a damping ring is provided on the lower side inside the valve cover, and the damping ring is located below the spring.

[0011] Preferably, a pressure sensor is installed on the top of the valve cover, and the pressure sensor is connected to a controller, which is electrically connected to an electromagnetic coil.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The design of the electromagnetic coil and permanent magnet of this utility model, combined with pulse current control, enables the valve to open and close quickly, much faster than the traditional spring-loaded safety valve. Through the linkage of pressure sensor and PID controller, the current intensity of electromagnetic coil and valve opening can be dynamically adjusted according to the overpressure ratio to achieve staged pressure relief and avoid excessive discharge or delayed response.

[0014] 2. The multi-stage stepped valve core of this utility model corresponds to different pressure thresholds. When overpressure occurs, the valve disc rises step by step to release pressure gradually, reduce system pressure fluctuations, and avoid sudden pressure drops or equipment impact caused by instantaneous full opening. The spiral flow channel causes the medium to form a centrifugal vortex, which actively flushes the valve core surface to prevent scaling or blockage. The damping ring absorbs the kinetic energy of the high-speed movement of the valve stem through elastic deformation and friction, reducing the impact speed of the valve disc and avoiding collision damage to the sealing surface. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the structure of a fast-opening and closing safety valve proposed in this utility model;

[0016] Fig. 2 This is a front cross-sectional view of a fast-opening and closing safety valve proposed in this utility model.

[0017] Fig. 3 This is a top sectional view of the structure of a fast-opening and closing safety valve proposed in this utility model.

[0018] In the diagram: 1. Valve seat; 2. Valve cover; 3. Backflush disc; 4. Adjusting ring; 5. Adjusting nut; 6. Damping ring; 7. Electromagnetic coil; 8. Permanent magnet; 9. Spring; 10. Pressure sensor; 11. Valve stem; 12. Valve disc; 13. Guide sleeve; 14. Stepped valve core; 15. Spiral flow channel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figs. 1-3A quick-opening and closing safety valve includes a valve seat 1 and a valve cover 2. The valve cover 2 is located on the valve seat 1. A valve stem 11 is provided inside the valve cover 2. An adjusting nut 5 is provided at the upper end of the valve stem 11. An electromagnetic coil 7 installed inside the valve cover 2 is provided at the lower side of the adjusting nut 5. A spring 9 is provided around the valve stem 11 and located inside the valve cover 2. A guide sleeve 13 is provided inside the valve seat 1 and installed inside the valve cover 2. The lower end of the valve stem 11 passes through the guide sleeve 13, and a valve disc 12 located below the guide sleeve 13 is fixed at the lower end of the valve stem 11. A stepped valve core 14 corresponding to the valve disc 12 is provided inside the valve seat 1.

[0021] The stepped valve core 14 is provided with a multi-stage valve port corresponding to the valve disc 12, and the valve port diameter increases from top to bottom. A spiral flow channel 15 is provided between the stepped valve core 14 and the valve seat 1, and the surface of the spiral flow channel 15 is coated with a wear-resistant coating. The stepped valve core 14 is divided into three valve ports, each corresponding to a different pressure threshold. When overpressure occurs, the valve disc 12 rises step by step, and pressure is released in stages through valve ports of different diameters to avoid pressure oscillation caused by instantaneous full opening. The valve port edge is overlaid with hard alloy (such as tungsten carbide) to improve wear resistance. A spiral shape is processed between the stepped valve core 14 and the valve seat 1. When the medium flows, a centrifugal vortex is formed to scour the valve core surface and prevent particulate matter from depositing.

[0022] A permanent magnet 8 is installed at the lower end of the valve stem 11. The permanent magnet 8 is located at the upper end of the valve disc 12. An adjusting ring 4 is installed in the valve seat 1 around the valve disc 12. A backwash plate 3 is installed in the valve seat 1 below the adjusting ring 4. A damping ring 6 is installed on the lower side of the inside of the valve cover 2. The damping ring 6 is located below the spring 9 and is installed on the inner wall of the valve cover 2. The material is nitrile rubber or polyurethane. The inner ring is clearance-fitted with the valve stem 11. When the valve is opened, the valve stem 11 moves upward at high speed. The damping ring 6 absorbs kinetic energy through friction and elastic deformation, reducing the impact speed of the valve disc 12. When closed, the damping ring 6 further slows down the reset speed to avoid damage to the sealing surface.

[0023] A pressure sensor 10 is installed on the top of the valve cover 2. The pressure sensor 10 is connected to a controller. The controller is electrically connected to an electromagnetic coil 7. The electromagnetic coil 7 is wound on a high-temperature resistant insulating frame. When energized, it generates a magnetic field opposite to that of the permanent magnet 8. The magnetic strength is adjusted by the controller. The permanent magnet 8 is embedded in the lower end of the valve stem 11 and is rigidly connected to the valve disc 12. The surface of the magnet is nickel-plated to prevent corrosion. The direction of the magnetic force is perpendicular to the direction of the magnetic field of the electromagnetic coil 7 to ensure maximum thrust. When the pressure sensor 10 detects an overpressure signal, the controller sends a pulse current to the electromagnetic coil 7, which pushes the valve stem 11 to move the valve disc 12 upward quickly. After the pressure returns to normal, the electromagnetic coil 7 is de-energized, and the permanent magnet 8 is reset under the action of the spring 9 and its own gravity. The valve disc 12 is then sealed to the stepped valve core 14.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-opening and closing safety valve, comprising a valve seat (1) and a valve cover (2), characterized in that, The valve cover (2) is located on the valve seat (1). A valve stem (11) is provided inside the valve cover (2). An adjusting nut (5) is provided at the upper end of the valve stem (11). An electromagnetic coil (7) installed inside the valve cover (2) is provided on the lower side of the adjusting nut (5). A spring (9) located inside the valve cover (2) is provided around the valve stem (11). A guide sleeve (13) is provided inside the valve seat (1). The guide sleeve (13) is installed inside the valve cover (2). The lower end of the valve stem (11) passes through the guide sleeve (13). A valve disc (12) located below the guide sleeve (13) is fixed at the lower end of the valve stem (11). A stepped valve core (14) corresponding to the valve disc (12) is provided inside the valve seat (1).

2. The quick-opening and closing safety valve according to claim 1, characterized in that, The stepped valve core (14) is provided with a multi-segment valve port corresponding to the valve disc (12), and the valve port diameter increases sequentially from top to bottom.

3. The quick-opening and closing safety valve according to claim 1, characterized in that, A spiral flow channel (15) is provided between the stepped valve core (14) and the valve seat (1), and the surface of the spiral flow channel (15) is coated with a wear-resistant coating.

4. The quick-opening and closing safety valve according to claim 1, characterized in that, A permanent magnet (8) is installed at the lower end of the valve stem (11). The permanent magnet (8) is located at the upper end of the valve disc (12). An adjusting ring (4) installed in the valve seat (1) is provided around the valve disc (12). A backwash plate (3) installed in the valve seat (1) is provided on the lower side of the adjusting ring (4).

5. The quick-opening and closing safety valve according to claim 1, characterized in that, A damping ring (6) is provided on the lower side inside the valve cover (2), and the damping ring (6) is located below the spring (9).

6. The quick-opening and closing safety valve according to claim 1, characterized in that, A pressure sensor (10) is installed on the top of the valve cover (2). The pressure sensor (10) is connected to a controller, which is electrically connected to an electromagnetic coil (7).

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