Pressure relief electric switch valve controller

Abstract

The utility model relates to a pressure relief electric switch valve controller which comprises a controller box body, a control circuit in the box body and a control panel on the surface of the box body, and the control circuit comprises a starting signal circuit, a valve opening control circuit, a valve closing control circuit, a valve execution control circuit, a signal input display circuit and a signal feedback circuit. The electric switch valve controller is easy to operate, safe and reliable, step-by-step controllable pressure relief is achieved through the control circuit, before the step-by-step opening time of a valve is over every time, the start button or the wireless start switch is used for executing turn-off and turn-on starting signal operation to achieve the function of overlapping the opening action time of the valve, and therefore the valve can be opened and closed. And meanwhile, the controller also has the function of automatically closing the valve after the starting signal is switched off or switched on overtime, so that the valve opening angle is controllable, and safe and stable pressure relief is realized.

Description

Technical Field

[0001] The utility model relates to an electric switch valve actuator, in particular to a pressure relief electric switch valve controller. Background Art

[0002] The electric switch valve is mainly composed of an electric actuator and a valve. The actuator motor is rotated forward and reversely to drive the valve to open or close. The electric switch valve is a commonly used control valve in industrial production. The electric switch valve has a simple structure and is easy to maintain. The electric switch valve is controlled by a remote control system or a hardware button of an on-site operation box to issue a control command, and the electric switch valve is controlled through an electrical control circuit.

[0003] In industrial high-temperature pressure relief applications, multiple pressure protection measures are generally configured, with "regulating valve + PLC + pressure sensor" automatic control pressure relief as the first protection measure; "electric switch valve + button + mechanical pressure gauge" manual operation pressure relief as the second protection measure; and pressure relief safety valve as the last pressure protection measure.

[0004] The pressure relief electric on-off valve is an on-off valve used for system pressure control and regulation functions. It is generally used as a second protection measure for industrial pressure relief protection applications. Its operation process generally requires rapid opening or closing of the valve. According to the changes in the system pressure value, the opening angle of the electric on-off valve is adjusted. Too large an opening angle or failure to close the valve in time can easily cause production accidents.

[0005] Electric switching valves generally only have two feedback signals: open and closed, which are usually displayed on the local operation box and the remote control system operation interface. During the rotation of the electric switching valve, the operator and control personnel cannot accurately grasp the real-time opening angle of the valve, and manual operation of the electric switching valve pressure relief operation is difficult.

[0006] In addition, the installation location of the pressure relief switch valve generally involves high temperature, high pressure or limited space. It is not easy to manually operate the valve to open and close through the valve body wrench. Manually operating the pressure relief valve on site is dangerous. Summary of the invention

[0007] In order to overcome the above-mentioned defects, the utility model provides a pressure relief electric switch valve controller, which realizes remote, local and wireless operation mode control. The valve opening action time superposition and opening angle controllable are realized by multiple disconnection and connection start signal operations. At the same time, an automatic valve closing protection circuit is designed to effectively avoid the electric switch valve opening angle being too large or not closed in time, thereby greatly improving the operational safety.

[0008] In order to achieve the above object, the technical solution of the utility model is:

[0009] A pressure relief electric switch valve controller comprises a controller box, a control circuit inside the box and a control panel on the surface of the box.

[0010] The control circuit includes a start signal circuit, a valve opening control circuit, a valve closing control circuit, a valve execution control circuit, a signal input and display circuit and a signal feedback circuit; the control circuit is electrically connected to each component on the operation panel.

[0011] The start signal circuit includes three start modes: local, wireless and remote. Specifically, it includes a first start signal circuit local self-reset button (SB1), a second start signal circuit wireless controller receiver switch contact (K1) and a third start signal circuit remote control start contact (KAn). The three are connected in parallel and can be synchronously operated to control the valve action. One end of the start signal circuit is electrically connected to the 220V AC power supply, and the other end is electrically connected to the valve opening control circuit.

[0012] In the valve opening control circuit, the normally closed auxiliary point of the time-delay connection relay (KT1) is connected in series with the valve opening control relay (KA1), and the two are simultaneously connected in parallel with the coil of the time-delay connection relay (KT1) and the coil of the time-delay disconnection relay (KT2). One end of the valve opening control circuit is electrically connected to the start signal circuit, and the other end is electrically connected to the neutral line of the mains.

[0013] The valve closing control circuit disconnects the normally open auxiliary contact of the time delay relay (KT2) and is connected in series with the normally closed auxiliary contact of the valve opening control relay (KA1), and is then connected in series with the coil of the valve closing control relay KA2. One end of the valve closing control circuit is electrically connected to the 220V mains power, and the other end is electrically connected to the neutral line of the mains power.

[0014] Preferably, a power indicator light is provided on the controller panel, which is electrically connected to the power incoming line to display whether the incoming power is normal; a valve opening status indicator light is provided on the controller panel, which is electrically connected to the power incoming line and the normally closed auxiliary contacts of the valve fully closed relay to display whether the valve is in the open state.

[0015] Preferably, in the signal indication circuit, the valve fully open signal relay and the valve fully closed signal relay are electrically connected to the valve actuator signal terminals "fully open signal" and "fully closed signal".

[0016] Preferably, the valve opening action relay, valve closing action relay, valve fully open indication relay, and valve fully closed indication relay are respectively connected to a remote control system to provide real-time feedback on the action and status of each relay.

[0017] Preferably, the setting time of the delay relay action in the control circuit is the maximum starting time of the valve single opening action, and the setting time is between 10% and 20% of the total valve opening time to avoid a sharp pressure relief due to excessive single opening angle.

[0018] Preferably, the setting time of the disconnect delay relay in the control circuit is the maximum continuous action time for the valve to automatically close after the valve start command is disconnected. The setting time is between 110% and 120% of the total valve closing time, ensuring that the valve has sufficient closing time to close in any open state.

[0019] The beneficial effects of the utility model.

[0020] 1. The utility model provides an electric switch valve controller which realizes step-by-step controllable pressure relief through a common control circuit, which has a simple structure, is reliable and safe, and is easy to operate.

[0021] 2. The control circuit of the controller of the utility model realizes the valve opening action time superposition function by executing the disconnection and connection of the start signal operation through the start button or the wireless start switch before the end of each step-by-step opening time of the valve. At the same time, the controller also has the function of automatically closing the valve after the start signal is disconnected or connected for a timeout, so that the valve opening angle can be controlled in steps, the pressure can be released safely and smoothly, and misoperation can be effectively avoided.

[0022] 3. The controller of the utility model has multiple operation modes, especially a wireless operation mode, which improves the convenience of operation.

[0023] 4. The circuit inside the controller of the utility model adopts conventional components such as relays, buttons, indicator lights, etc., which has low maintenance cost and is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the controller panel and wireless controller of the utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of the control box of the utility model.

[0026] Figure 3 This is the control circuit of the pressure relief valve of the utility model Figure 1 .

[0027] Figure 4 This is the control circuit of the pressure relief valve of the utility model Figure 2 .

[0028] Figure 5 This is the signal input and display circuit diagram of the utility model.

[0029] Figure 6 This is the signal feedback circuit diagram of the utility model, wherein a is the valve opening action feedback circuit, b is the valve closing action feedback circuit, c is the valve full opening signal feedback circuit, and d is the valve closing signal full feedback circuit.

[0030] Figure 1Among them, 1-wireless controller receiver antenna, 2-power indicator light, 3-valve emergency start button (self-reset button), 4-valve opening status indicator light, 5-wireless controller transmitter (remote control), 300-control panel.

[0031] Figure 2-5 Among them, SB1-valve emergency start self-reset button, K1-wireless controller receiver, KAn-remote control passive switch point, KA1-valve opening control relay, KA2-valve closing control relay, KT1-connection delay relay, KT2-disconnection delay relay, KA3-valve opening position signal relay, KA4-valve closing position signal relay, 200-control circuit, 201-start signal circuit, 202-valve opening control circuit, 203-valve closing control circuit, 204-valve execution control circuit, 205-signal input and display circuit, 206-signal feedback circuit. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with specific embodiments, but the embodiments of the present invention are not limited thereto.

[0033] like Figure 1-6 A pressure relief electric switch valve controller is shown, comprising a control box body (100), a control circuit (200) installed inside the control box, and a control panel (300) on the outer surface of the control box.

[0034] The control circuit (200) comprises a start signal circuit (201), a valve opening control circuit (202), a valve closing control circuit (203), a valve execution control circuit (204), a signal input and display circuit (205) and a signal feedback circuit (206); the control circuit is electrically connected to each component on the operation panel (300).

[0035] The start signal circuit (201) specifically comprises a first start signal circuit local self-reset button (SB1), a second start signal circuit wireless controller receiver switch contact (K1) and a third start signal circuit remote control start contact (KAn), the three of which are connected in parallel and can be operated synchronously to control the valve action. One end of the start signal circuit is electrically connected to the mains 220V, and the other end is electrically connected to the valve opening control circuit (202).

[0036] The start signal circuit (201) includes three start modes: local, wireless, and remote, and can synchronously and effectively control the valve action. Under normal circumstances, the remote mode is used to control the valve action. When the remote control system is unavailable or in other emergency situations, the valve emergency start self-reset button SB1 on the local controller panel or the wireless controller transmitter (remote control) is used for operation.

[0037] The valve opening control circuit (202) has a normally closed auxiliary point of a time-delay connection relay (KT1) connected in series with the valve opening control relay (KA1), and both are simultaneously connected in parallel with the coil of the time-delay connection relay (KT1) and the coil of the time-delay disconnection relay (KT2). One end of the valve opening control circuit is electrically connected to the start signal circuit (201), and the other end is electrically connected to the neutral line of the mains.

[0038] The valve closing control circuit (203) disconnects the normally open auxiliary contact of the time delay relay (KT2) and is connected in series with the normally closed auxiliary contact of the valve opening control relay (KA1), and is then connected in series with the coil of the valve closing control relay KA2. One end of the valve closing control circuit is electrically connected to the 220V mains power, and the other end is electrically connected to the neutral line of the mains power.

[0039] In this embodiment, the total action time of the pressure relief switch valve from the fully closed state to the fully open state is 35 seconds. The setting time of the valve opening control relay (KA1) in the valve opening control circuit (202) is 10% to 20% of the total action time, between 3.5 and 7 seconds, and is specifically set to 5 seconds in this embodiment, that is, the "maximum start time of a single opening action" is set to 5 seconds; the setting time of the disconnection delay relay (KT2) in the valve closing control circuit (203) is 110% to 120% of the total time, between 38.5 and 42 seconds, and is specifically set to 40 seconds in this embodiment, that is, the "maximum continuous action time of automatic closing" is set to 40 seconds.

[0040] When the valve start command signal is connected within 5s of the "single opening action maximum start time", the valve opening control relay KA1 coil is energized and acts immediately, the disconnected delay relay KT2 coil is energized and acts immediately, the connected delay relay KT1 coil is energized and starts timing, at which time the valve opening action begins.

[0041] When the valve start command signal is connected for more than 5s after the "single opening action maximum start time", the delayed connection relay KT1 will act after the timing ends, the valve opening control relay KA1 coil will lose power and disconnect, and the valve closing control relay KA2 coil will be energized and start to act. At this time, the valve closing action begins to be executed, that is, after the valve start command is connected for more than the single maximum opening time, the valve automatically executes the closing action.

[0042] When the valve start command signal is connected and then disconnected, the valve opening control relay KA1 coil loses power, the valve closing control relay KA2 coil is energized, the valve closing action begins to execute, and the disconnection delay relay KT2 starts timing. After the "maximum continuous action time for automatic closing" of 40s ends, the KT2 normally open auxiliary contact is disconnected, the valve closing control relay KA2 coil loses power, and the valve closing action control signal is disconnected.

[0043] When the valve start command signal is connected within 5s of the "maximum start time for a single opening action", or the start signal is disconnected and connected again during the valve closing start process, the valve opening control relay KA1 will act immediately, and the delay relay KT1 will start timing. At this time, the valve will enter the opening action execution process again; the start command signal is repeatedly disconnected and connected within 5s of the "maximum start time for a single opening action", and the actual valve opening start time is accumulated and superimposed.

[0044] The controller panel is also provided with a power indicator light H1 and a valve opening status indicator light H2, which are electrically connected to the incoming power supply and the normally closed auxiliary contacts of the valve full-close signal relay respectively.

[0045] The normally open contacts of the valve opening action relay KA1, the normally open contacts of the valve closing action relay KA2, the normally open contacts of the valve fully open indication relay KA3, and the normally open contacts of the valve fully closed indication relay KA4 are electrically connected to the remote control system respectively to provide real-time feedback on the actions of each relay and the valve switch status.

[0046] The incoming power supply is AC220V 50Hz mains power supply.

[0047] The wireless controller comprises a wireless controller receiver, an external wireless receiver antenna and a wireless controller transmitter. The receiver is powered by an AC220v power supply and a single-channel wireless controller is selected.

[0048] The wireless controller receiver is installed inside the valve controller, and the receiver external antenna is electrically connected to the receiver and installed outside the control box of the valve controller.

[0049] The wireless controller transmitter is powered by a battery, and the transmitter (remote control) button selects the inching mode.

[0050] The appearance of the controller panel of the pressure relief electric switch valve controller of the utility model is as shown in the attached Figure 1 As shown in the figure, the main body of the controller is the control box, the auxiliary device of the controller is the wireless controller transmitter (remote control), the outer surface of the box is the controller panel, and accessories such as indicator lights, buttons, signs, and nameplates are installed; the control circuit structure inside the box is as shown in the attached Figure 2 , including valve control circuit and terminal block; an external antenna of the wireless controller transmitter is installed on the upper outside of the box.

[0051] The technical solution is as follows: 1. Use signal cables to connect various valve signals to this controller, including valve switch instructions, valve status feedback, etc., and connect signals with the remote control system through this controller; 2. This controller has three operation modes: local, wireless, and remote, and they are effective at the same time. When the remote control system is invalid or an emergency occurs on site, you can directly select the local controller emergency start button to operate, which improves control safety; 3. When the operator performs the valve pressure relief operation, press the emergency start button and the valve opens for 5s. At this time, by comparing the current system pressure value, choose whether to release and press the button again to increase the opening angle of the pressure relief switch valve; if the button is released, the valve automatically closes, achieving the purpose of controllable and safe pressure relief; 3. The opening state of the valve is equipped with an indicator light for intuitive observation.

[0052] Controller panel and transmitter (with Figure 1 ) The functions of each component are as follows: 1 is the external antenna of the wireless controller receiver, which is used for signal reception; 2 is the power indicator light, which is red and shows whether the system power supply is normal. The light is on when the power is turned on; 3 is the valve emergency start button, which is a self-reset button. By selecting a single press or multiple presses, the valve will open to the appropriate opening angle. After finally releasing it, the valve will immediately close until it is fully closed; 4 is the valve opening status indicator light, which is green. When the valve is in the process of opening or fully open, this light is on; 5 is the wireless controller transmitter (remote control), and its operation and function are the same as the valve emergency start button.

[0053] The wireless controller includes a receiver and a transmitter, which can use conventional finished components on the market and can be flexibly selected according to usage needs, so they will not be described here. The following text specifically introduces the internal control circuit of the controller.

[0054] Attached Figure 3 For the pressure relief valve control circuit Figure 1 , attached Figure 4 For the pressure relief valve control circuit Figure 2 , attached Figure 5 For signal input and display circuit, attached Figure 6 It is a signal feedback circuit, which is introduced in detail as follows.

[0055] Component introduction: SB1 emergency start self-reset button SB1, corresponding to the attached Figure 1 2, K1 is the wireless controller receiver switch contact, KAn is the remote control start contact, KA1 is the valve opening control relay, KA2 is the valve closing control relay, KT1 is the connection delay relay, and KT2 is the disconnection delay relay.

[0056] Introduction to valve control circuit: The start signal circuit includes three start modes: local, wireless and remote. Specifically, it includes the local self-reset button (SB1) of the first start signal circuit, the switch contact (K1) of the wireless controller receiver of the second start signal circuit and the remote control start contact (KAn) of the third start signal circuit. The three are connected in parallel and can effectively control the valve action synchronously. Under normal circumstances, the remote mode is used to control the valve action. When the remote control system is unavailable or in other emergency situations, the valve emergency start self-reset button SB1 on the local controller panel or the wireless controller transmitter (remote control) is used for operation.

[0057] When the valve start command is turned on, the KA1 coil is energized and held, the KT1 coil is energized and the 5s timing starts, the KT2 coil is energized and held, and the valve opening signal is sent to the valve through the KA1 normally open auxiliary contact. The valve will execute the opening action until the KT1 timing of 5s ends.

[0058] When the pressure relief valve performs the opening action until the KT1 timing ends for 5s, the valve start command continues to be connected, and the KT1 action is performed after the timing ends. The KT1 normally closed auxiliary contact is disconnected, the KA1 coil loses power, the KT2 coil remains energized and the auxiliary contact action is maintained, the valve closing relay KA2 coil is energized, the valve opening signal is disconnected, and the valve closing signal is sent to the valve through the KA2 normally open auxiliary contact. The valve will perform the closing action until it is fully closed or the next valve opening signal appears.

[0059] When the pressure relief valve is performing an opening or closing action, the valve start command is disconnected, the KT1 coil and the KA1 coil lose power, KA2 starts timing for 40 seconds, the KA1 normally closed auxiliary contact is connected, and the KT2 normally open auxiliary contact continues to remain connected until the 40 seconds are over. The valve opening signal is disconnected, and the valve closing signal is sent to the valve through the KA2 normally open auxiliary contact. The valve will perform a closing action until it is fully closed or the next valve opening signal appears or the KT2 timing ends.

[0060] When the pressure relief valve is in the process of opening, the valve start command is disconnected and then immediately reconnected. The KT1 coil and KA1 coil are powered on again after losing power, KT1 restarts the timing for 5s, and the KA2 coil is powered on again after losing power and stops timing. The valve opening signal is sent to the valve through the KA1 normally open auxiliary contact, and the valve will perform the opening action again until the KT1 timing of 5s ends. Therefore, within 5s of the valve opening, the start command is repeatedly disconnected and connected, so that the valve can be opened to the appropriate opening angle multiple times in a row, and the connection signal is disconnected, and the valve can immediately execute the closing action until it is closed.

[0061] Signal input and indication circuit introduction: Figure 5As shown in the figure, the terminal common end, full open signal, and full close signal are all signal terminals on the valve. The incoming power supply supplies power to this circuit, firstly to the valve full open signal relay and valve close signal relay; secondly, to the power indicator light and the valve open status indicator light, and send various status signals to the remote control system through these relays.

[0062] Signal output circuit introduction: Valve open relay, valve close relay, valve fully open signal relay, valve fully closed signal relay will provide real-time feedback to the remote control system through KA1, KA2, KA3 and KA4.

[0063] Others: This controller can be installed on site, near the controlled valve, where it is easy to observe and operate; this controller can choose boxes with different protection levels according to the site conditions.

[0064] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, or directly or indirectly used in other related fields, are also included in the patent protection scope of the utility model.

Claims

1. A pressure relief electric switch valve controller, characterized in that: The controller comprises a control box body (100), a control circuit (200) installed inside the control box, and a control panel (300) on the outer surface of the control box, wherein the control circuit (200) comprises a start signal circuit (201), a valve opening control circuit (202), a valve closing control circuit (203), a valve execution control circuit (204), a signal input and display circuit (205), and a signal feedback circuit (206); The start signal circuit (201) comprises a first start signal circuit local self-reset button (SB1), a second start signal circuit wireless controller receiver switch contact (K1) and a third start signal circuit remote control start contact (KAn), the three of which are connected in parallel, one end of which is electrically connected to the 220V mains power, and the other end of which is electrically connected to the valve opening control circuit (202); The normally closed auxiliary point of the time-delay connection relay (KT1) in the valve opening control circuit (202) is connected in series with the valve opening control relay (KA1), and the two are simultaneously connected in parallel with the coil of the time-delay connection relay (KT1) and the coil of the time-delay disconnection relay (KT2); one end of the valve opening control circuit (202) is electrically connected to the start signal circuit (201), and the other end is electrically connected to the neutral line of the mains; The normally open auxiliary contact of the disconnect delay relay (KT2) in the valve closing control circuit (203) is connected in series with the normally closed auxiliary contact of the valve opening control relay (KA1), and then connected in series with the coil of the valve closing control relay KA2. One end of the valve closing control circuit (203) is electrically connected to the 220V mains power, and the other end is electrically connected to the neutral line of the mains power.

2. The pressure relief electric switch valve controller according to claim 1, characterized in that The setting time of the delayed connection relay (KT1) in the valve opening control circuit (202) is the maximum starting time of a single opening action, and the setting time is between 10% and 20% of the total valve opening time.

3. The pressure relief electric switch valve controller according to claim 1, characterized in that The setting time of the disconnection delay relay (KT2) in the valve opening control circuit (202) is the maximum continuous action time of automatic closing, and the setting time is between 110% and 120% of the total valve closing and opening time, so as to ensure that the valve has sufficient automatic closing time and closes in place in any opening state.

4. The pressure relief electric switch valve controller according to claim 1, characterized in that: Before the end of each step-by-step opening time of the valve, the valve opening action time superposition function is realized by executing the operation of disconnecting and connecting the start signal. At the same time, the controller also has the function of automatically closing the valve after the start signal is disconnected or connected for a timeout, so that the pressure relief process can be controlled in steps.

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