Large-diameter valve quick-closing control system

Abstract

The utility model discloses a quick-closing control system for a large-diameter valve, and relates to the technical field of valve control. The device comprises a control module and a driving unit, the driving unit is in signal connection with the control module, and the driving unit receives signal instructions sent by the control module and executes actions. According to the valve plate switch, the mechanical power of the air cylinder is used for lifting the valve plate, the electromagnetic force of the electromagnet is used for restraining the valve plate, the gravity is used for closing the valve plate, different types of power are comprehensively utilized, and more flexible and efficient control is achieved; the combination mode can be optimized and adjusted according to different working condition requirements; the air cylinder and the electromagnet are accurately controlled through the control module, the state of the valve plate can be automatically switched according to different signals, opening or closing of the valve plate can be automatically determined according to parameters such as pressure and flow fed back by the sensor, and the automation degree and the intelligent level of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve control technical field, concretely is large -bore valve quick closing control system. BACKGROUND

[0002] Large -bore valve usually refers to the valve in DN200mm above, and large -bore valve usually is applied to the high flow scene, for example: petrochemical, metallurgy, power etc.

[0003] The prior art for large -bore valve plate's quick closing system mainly has following four kinds:

[0004] 1, hydraulic closing:

[0005] Hydraulic quick closing valve usually provides power by hydraulic pump station, under normal conditions, hydraulic oil is pumped into the side of actuator, makes the valve stem keep in the open position;

[0006] When needing to close the valve, control system switches hydraulic oil circuit, and the hydraulic oil is guided into the other side of actuator, thereby pushing the valve stem to move rapidly, drives the valve plate to close the valve;

[0007] 2, pneumatic closing:

[0008] Pneumatic quick closing valve relies on compressed air as power source, and compressed air enters the cylinder of pneumatic actuator, and acts on the piston or diaphragm;

[0009] Under normal working, the pressure of compressed air makes the piston or diaphragm be in a position, and keeps the valve open, when receiving the closing signal, the flow direction of compressed air changes, or the pressure in the cylinder is released, so that the piston or diaphragm moves rapidly, drives the valve stem and valve plate to close the valve;

[0010] 3, electric-hydraulic combined closing:

[0011] Electric part is mainly used for the reception and processing of control signal, and converts electric signal into hydraulic control signal;

[0012] Hydraulic part generates strong hydraulic pressure according to control signal, and pushes the actuator to act, for example, electric control system controls the opening and closing of hydraulic valve, thereby changing the flow direction and pressure of hydraulic oil, realizes the rapid movement of valve stem, and completes the closing of valve;

[0013] 4, weight type closing:

[0014] Under normal conditions, the weight is lifted or fixed in a position, and the valve plate is kept open by mechanical structure;

[0015] When it is necessary to close the valve, the heavy hammer is released, the heavy hammer falls rapidly under the action of gravity, and drives the valve plate to quickly close the valve through a transmission device such as a connecting rod or a rope;

[0016] There are still some defects in controlling the opening and closing of the large-diameter valve plate through the above-mentioned technologies:

[0017] 1. Liquid-driven closing:

[0018] The hydraulic system occupies a large space in the separation box, which may affect the layout of other components. If hydraulic oil leaks, it may contaminate the working environment in the separation box, adversely affecting the separation effect. Since the environment in the separation box may be complex, the difficulty of hydraulic system maintenance and fault troubleshooting is increased;

[0019] 2. Pneumatic closing:

[0020] The air circuit arranged in the separation box may be relatively complex and occupy a certain space. The storage and supply equipment of compressed air may increase the complexity and cost of the overall system. The noise generated by the pneumatic system may form a large disturbance in the separation box;

[0021] 3. Electric-hydraulic combined closing:

[0022] The combination of electrical and hydraulic systems greatly increases the complexity of the system, making installation and maintenance difficult in the separation box. Once a fault occurs, both electrical and hydraulic problems need to be checked, which is time-consuming and labor-intensive. The cost of this system is relatively high, which may increase the overall cost of the separation box;

[0023] 4. Heavy hammer closing:

[0024] The heavy hammer requires a large installation space, which may be difficult to achieve in a space-limited separation box. The impact generated when the heavy hammer falls may pose a certain challenge to the structural stability of the separation box. The speed and force of the heavy hammer closing are difficult to accurately adjust, which may not meet the requirements of some high-precision separation processes. Practical new type content

[0025] In order to solve the above problems, the purpose of the present application is to provide a large-diameter valve quick closing control system.

[0026] To solve the above technical problems, the utility model adopts the following technical scheme: a large-diameter valve quick closing control system, comprising a control module and a driving unit, the driving unit is signal connected with the control module, the driving unit receives the signal instruction sent by the control module, and executes the action;

[0027] The control module comprises a power supply, a controller and a sensor module;

[0028] The driving unit comprises a valve body, a valve rod, a valve plate, an electromagnet, a magnetic seat, a cylinder and a fixing frame;

[0029] The electromagnet is electrically connected with a power supply, and the cylinder is signal-connected with a controller;

[0030] The valve rod and the valve plate are slidingly assembled in the inner cavity of the valve body, the fixing frame is fixedly assembled at the upper end of the valve body, one end of the cylinder body is fixedly assembled at the middle part of the fixing frame, the piston end of the cylinder is fixedly connected with one end of the valve rod, the electromagnet is fixedly assembled at the lower surface of the fixing frame, and the magnetic seat is fixedly assembled at one end of the valve rod.

[0031] Preferably, the control module further comprises an overload protector.

[0032] Preferably, two counterweights are fixedly assembled on the upper surface of the valve plate.

[0033] Preferably, a sealing piece is fixedly assembled on the bottom wall of the valve body.

[0034] Compared with the prior art, the utility model has the advantages that:

[0035] 1、In the utility model, the mechanical power of the cylinder is used to lift the valve plate, the electromagnetic force of the electromagnet is used to constrain the valve plate, and the gravity is used to close the valve plate, different types of power are comprehensively utilized, more flexible and efficient control is realized, compared with the traditional single-power valve plate switch, the combined mode can be optimized and adjusted according to different working condition requirements.

[0036] 2、In the utility model, the control module is used to realize the accurate control of the cylinder and the electromagnet, the state of the valve plate can be automatically switched according to different signals, the opening or closing of the valve plate can be automatically determined according to the pressure, flow and other parameters fed back by the sensor, and the automation degree and intelligent level of the system are improved.

[0037] 3、In the utility model, when the valve plate is in the open state, the support of the cylinder and the constraint of the electromagnet are combined, double protection is realized to ensure that the valve plate will not be closed accidentally, and when it is necessary to close, even if the electromagnet fails to be powered off in time, the valve plate can be reliably closed under the action of gravity, and the reliability and safety of the system are greatly improved.

[0038] 4、In the utility model, the relatively simple combination of the cylinder and the electromagnet is adopted, the wear and failure probability of mechanical parts are reduced, and the maintenance cost is reduced.

[0039] 5、In the utility model, the gravity is used as the power to close the valve plate, and no additional energy consumption is needed. In some application scenarios where the valve plate needs to be frequently opened and closed, energy consumption can be significantly reduced, meeting the requirements of energy saving and environmental protection.

[0040] 6. In this utility model, the electromagnet is only energized when the valve plate needs to be kept open, and is de-energized at other times, which reduces unnecessary power consumption and further reduces energy consumption. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Fig. 1 This is a schematic diagram of the control module of this utility model.

[0043] Fig. 2 This is a schematic diagram of the valve plate of this utility model in its closed state.

[0044] Fig. 3 This is a schematic diagram of the valve plate of this utility model in its open state.

[0045] In the diagram: 10. Control module; 11. Power supply; 12. Controller; 13. Sensor module; 14. Overload protector; 20. Drive unit; 21. Valve body; 22. Valve stem; 23. Valve plate; 231. Counterweight; 24. Electromagnet; 25. Magnetic base; 26. Cylinder; 27. Fixing frame; 28. Seal. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] Example: Figs. 1-3 As shown, this utility model provides a fast-closing control system for large-diameter valves, including a control module 10 and a drive unit 20. The drive unit 20 is signal-connected to the control module 10, and the drive unit 20 receives signal commands from the control module 10 and executes actions.

[0048] The control module 10 includes a power supply 11, a controller 12, a sensing module 13, and an overload protector 14. The controller 12 is a relay control circuit, the sensing module 13 includes a pressure sensor, a flow sensor, and a position sensor, and the overload protector 14 is used for overload protection and limit protection.

[0049] The driving unit 20 comprises a valve body 21, a valve rod 22, a valve plate 23, an electromagnet 24, a magnetic seat 25, a cylinder 26 and a fixing frame 27, the sensor module 13 is used to read the flow in the inner cavity of the valve body 21, the pressure borne by the valve plate 23 and the height position information of the valve plate 23 in the inner cavity of the valve body 21;

[0050] The electromagnet 24 is electrically connected with the power supply 11, the power supply 11 is used to electrify the electromagnet 24, the cylinder 26 is signal connected with the controller 12, the cylinder 26 is connected to the gas source equipment, the air inlet and the air outlet are controlled through the electromagnetic valve, the signal instruction of the controller 12 controls the action of the cylinder 26, when the controller 12 issues the power-off instruction, the power supply 11 stops the power supply of the electromagnet 24;

[0051] The valve rod 22 and the valve plate 23 are slidingly assembled in the inner cavity of the valve body 21, the fixing frame 27 is fixedly assembled at the upper end of the valve body 21, one end of the cylinder body of the cylinder 26 is fixedly assembled at the middle part of the fixing frame 27, the piston end of the cylinder 26 is fixedly connected with one end of the valve rod 22, by starting the cylinder 26, the piston end of the cylinder 26 is stretched and contracted to make the valve rod 22 and the valve plate 23 ascend and descend, the electromagnet 24 is fixedly assembled on the lower surface of the fixing frame 27, the magnetic seat 25 is fixedly assembled on one end of the valve rod 22, the electromagnet 24 vertically corresponds to the magnetic seat 25, when the valve plate 23 is in the open state, the lower surface of the electromagnet 24 contacts with the upper surface of the magnetic seat 25, by electrifying the electromagnet 24, the electromagnet 24 generates the magnetic field and is adsorbed and fixed with the magnetic seat 25, the valve plate 23 is kept in the open state, the upper surface of the valve plate 23 is fixedly assembled with two counterweights 231, the bottom wall of the valve body 21 is fixedly assembled with a sealing element 28, by arranging the counterweights 231 and the sealing element 28, the valve plate 23 rapidly falls under the counterweight effect of the counterweights 231 until contacting with the sealing element 28 in the inner cavity of the valve body 21, the sealing element 28 is compressed, the sealing property between the valve plate 23 and the bottom wall of the inner cavity of the valve body 21 is improved.

[0052] Working principle: when in use, the valve plate 23 is opened:

[0053] The inlet and outlet of the cylinder 26 are connected with the gas source equipment, after the controller 12 receives the signal of opening the valve plate 23, the electromagnetic valve (assembled on the air inlet of the cylinder 26, not shown in the figure) is controlled to make the cylinder 26 intake air, the piston of the cylinder 26 moves upward to lift the valve plate 23 vertically upward in the inner cavity of the valve body 21, the valve plate 23 is separated from the sealing element 28;

[0054] When the valve plate 23 reaches the fully open position, the position sensor in the sensor module 13 detects the position signal of the valve plate 23 and feeds back to the controller 12, at the same time, the lower surface of the electromagnet 24 contacts with the upper surface of the magnetic seat 25;

[0055] The controller 12 controls the electromagnetic iron 24 to be powered on, the electromagnetic iron 24 generates a magnetic field and is adsorbed and fixed with the magnetic suction seat 25, the valve plate 23 is fixed, and the valve plate 23 is kept in an open state;

[0056] The valve plate 23 is closed:

[0057] After the controller 12 receives the signal of closing the valve plate 23, the electromagnetic iron 24 is first controlled to be powered off, and the constraint on the valve plate 23 is released;

[0058] The valve plate 23 falls rapidly under the counterweight force of the counterweight block 231 until the sealing element 28 in the inner cavity of the valve body 21 is contacted and the sealing element 28 is pressed tightly;

[0059] The position sensor in the sensing module 13 detects the signal that the valve plate 23 has been closed and feeds back to the controller 12, and the closing operation is completed.

[0060] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model belong to the scope of the utility model claims and equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A large-diameter valve rapid closing control system, comprising a control module (10) and a drive unit (20), characterized in that: The drive unit (20) is signal-connected to the control module (10). The drive unit (20) receives signal commands from the control module (10) and performs actions. The control module (10) includes a power supply (11), a controller (12), and a sensing module (13); The drive unit (20) includes a valve body (21), a valve stem (22), a valve plate (23), an electromagnet (24), a magnetic base (25), a cylinder (26), and a fixing frame (27); The electromagnet (24) is electrically connected to the power supply (11), and the cylinder (26) is signal connected to the controller (12); The valve stem (22) and valve plate (23) are slidably assembled in the inner cavity of the valve body (21). The fixing bracket (27) is fixedly assembled in the upper end of the valve body (21). One end of the cylinder body (26) is fixedly assembled in the middle of the fixing bracket (27). The piston end of the cylinder (26) is fixedly connected to one end of the valve stem (22). The electromagnet (24) is fixedly assembled in the lower surface of the fixing bracket (27). The magnetic seat (25) is fixedly assembled in the middle of the valve stem (22). The electromagnet (24) and the magnetic seat (25) are vertically aligned.

2. The large-diameter valve rapid closing control system as described in claim 1, characterized in that, The control module (10) also includes an overload protector (14).

3. The large-diameter valve rapid closing control system as described in claim 1, characterized in that, Two counterweights (231) are fixedly mounted on the upper surface of the valve plate (23).

4. The large-diameter valve rapid closing control system as described in claim 1, characterized in that, The bottom wall of the valve body (21) is fixedly fitted with a sealing element (28).

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