Hydraulic butterfly valve integrated control device and control method based on three-position four-way electromagnetic valve

Abstract

The hydraulic butterfly valve integrated control device based on the three-position four-way electromagnetic valve comprises an oil station and a control electric appliance cabinet, the oil station adopts the oil station mutual redundancy design, oil temperature detection and control are added, and the electric appliance control cabinet is integrated on the side face of the oil station so as to improve system integration. A three-position four-way electromagnetic valve, two hydraulic control one-way valves and two adjusting valves are adopted to control the oil cylinder; the circulating water hydraulic control butterfly valve control block comprises a three-position four-way electromagnetic valve, a stacked hydraulic control one-way valve, a pressure retaining valve, a system main oil pump oil inlet one-way valve, a stop valve, an overflow valve, a one-way valve and a control integrated block. On-line maintenance of the electromagnetic valve is facilitated, the failure rate is reduced, a hydraulic control butterfly valve oil station oil pump can be operated remotely or locally, automatic oil supplementing ensures that the pressure of a hydraulic system is always within a certain range, energy is provided for opening and closing the butterfly valve, and the oil temperature is detected and controlled in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valve control, and in particular to a hydraulic butterfly valve integrated control device and a control method based on a three-position four-way solenoid valve. Background Art

[0002] The original hydraulic system controls the oil cylinder through two electromagnetic ball valves controlling four hydraulically controlled one-way valves. The electromagnetic valve is a two-position four-way solenoid valve. When the power is off, the butterfly valve is closed, and the energized butterfly valve is open. When the oil cylinder needs to move, the two electromagnetic valves and four hydraulically controlled one-way valves need to move at the same time. The original design hydraulic diagram is attached to the instruction manual. Figure 1 .

[0003] The hydraulic control butterfly valve of the circulating water pump currently has the following defects: 1. Since two solenoid valves and four hydraulically controlled one-way valves need to work together to effectively control the butterfly valve, once any of the six devices fails, the entire control system will fail. In order to eliminate the problem, a thorough overhaul is required, which results in a high failure rate and a large maintenance workload. 2. Since the butterfly valve is in the open state, the solenoid valve needs to be energized during operation, which will shorten the service life of the solenoid valve; 3. There is always high-pressure oil on one side of the oil cylinder, and the seal is not good enough, which leads to frequent oil leakage; 4. The system has no monitoring and control measures for oil temperature. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a hydraulic butterfly valve integrated control device and control method based on a three-position four-way solenoid valve.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A hydraulic butterfly valve integrated control device based on a three-position, four-way solenoid valve includes an oil station and an electrical control cabinet. The oil station adopts a mutually redundant design to increase oil temperature detection and control. The electrical control cabinet is integrated on the side of the oil station to improve system integration. The three-position, four-way solenoid valve, two hydraulically controlled one-way valves, and two regulating valves are used to control the oil cylinder. The circulating water hydraulic control butterfly valve control block includes a three-position four-way solenoid valve, a superimposed hydraulically controlled one-way valve, a pressure maintaining valve, a system main oil pump oil inlet one-way valve, a stop valve, a relief valve, a one-way valve and a control integrated block.

[0006] As a further solution of the present invention, a switch butterfly valve with a self-locking function is included.

[0007] A control method for a hydraulic butterfly valve integrated control device based on a three-position four-way solenoid valve comprises the following steps: Step 1: Use DCS to realize control, and use DCS to realize all controls of hydraulically controlled butterfly valves and hydraulic oil pumps; Step 2: On-site, set the operation mode "switch" on the control cabinet operation panel to "on-site" mode. The indicator light will light up, and you can operate the on, off, and stop buttons on the control cabinet to change the energized state of the YV1 and YV2 solenoid valves and control the action of the hydraulically controlled butterfly valve. a. Open the valve: When the "local or remote control" knob switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "open valve" position and issue an opening command to realize local opening. When the 15° opening signal comes, pause and wait for the circulating pump operation signal to be issued before continuing to open the butterfly valve; b. Valve closing: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "close valve" position and issue a closing command to achieve local closing. When the 15° opening signal comes, pause and wait for the pump stop signal to be issued before continuing to close the butterfly valve; c. Stop: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch of the local cabinet to the "stop" position and issue a stop command to achieve an intermediate stop.

[0008] Step 3: Remotely, set the operation mode "switch" on the control cabinet panel to "remote" mode, the indicator light will be on, and the control cabinet will receive the open, close, and stop instructions from the DCS system to realize the interlocking start and stop of the butterfly valve and the water pump: a. Open valve: The DCS system sends a valve opening signal, and the YV2 solenoid valve is automatically held after being energized. When it reaches the fully open position, the indicator light turns on and the valve opens to 15° as a program-controlled start signal; b. Valve closing: The DCS system sends a valve closing signal, and the YV1 solenoid valve is automatically held after being energized. When it reaches the fully closed position, the indicator light turns on and the valve opens to 15° as a program-controlled stop signal. c. Stop: The DCS system issues a stop command for the butterfly valve, the YV1 and YV2 solenoid valves lose power, the oil circuit is cut off, and the butterfly valve stops moving; Step 4: Automatic oil replenishment circuit: Change the oil pump interlock function knob on the original local control cabinet to the oil pump start / stop command knob. The remote DCS start / stop command and the local start / stop command are connected in parallel, so that the oil pump of the hydraulically controlled butterfly valve oil station can be operated remotely or locally. When the hydraulic oil pressure is lower than the lower limit of the set value, the hydraulic oil pump interlock starts and the oil pump contactor is energized. When the system pressure reaches the upper limit of the set value, the hydraulic oil pump protection stops, the oil pump contactor is disconnected, and automatic oil replenishment ensures that the pressure of the hydraulic system is always within a certain range, providing energy guarantee for the switching butterfly valve.

[0009] Step 5: The protective electrical control cabinet should be equipped with short-circuit protection. The hydraulic oil pump should be replenished with oil. If it runs continuously for more than 10 minutes, the oil pump protection stop will be triggered and a hydraulic fault alarm signal will be issued. The butterfly valve is not fully open or fully closed.

[0010] The beneficial effects of the present invention are: The present invention: After the transformation, the solenoid valve can increase the pressure holding time, reduce the system internal leakage, and ensure that the pressure holding time meets the system requirements. Even if the main oil pump fails, the butterfly valve can be kept in the original position to maintain the original opening, so as to facilitate online maintenance of the solenoid valve and reduce the failure rate.

[0011] The present invention replaces the oil pump interlock function knob on the original local control cabinet with an oil pump start / stop command knob, and the remote DCS start / stop command and the local start / stop command are connected in parallel, so that the oil pump of the hydraulically controlled butterfly valve oil station can be operated remotely or locally. When the hydraulic oil pressure is lower than the lower limit of the set value, the hydraulic oil pump interlock is started and the oil pump contactor is energized. When the system pressure reaches the upper limit of the set value, the hydraulic oil pump protection stops and the oil pump contactor is disconnected. Automatic oil replenishment ensures that the pressure of the hydraulic system is always within a certain range, provides energy guarantee for switching the butterfly valve, and performs real-time detection and control of the oil temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the hydraulic principle diagram of the original design of the present invention; Figure 2 It is the hydraulic principle diagram of the present invention. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0015] Reference Figure 1-2 A hydraulic butterfly valve integrated control device based on a three-position, four-way solenoid valve retains all the control functions of the original control system; the oil station and control electrical cabinet are completely replaced (the main oil pump, motor, and accumulator are reused), the oil station adopts a mutually redundant design (see the hydraulic principle diagram for details), and oil temperature detection and control are added; the electrical control cabinet is integrated on the side of the oil station to improve system integration; All control functions of the original control system were retained; the oil station and control electrical cabinet were replaced as a whole (the main oil pump, motor, and accumulator were reused). The oil station adopted a mutually redundant design (see the hydraulic principle diagram for details), and oil temperature detection and control were added. The electrical control cabinet was integrated into the side of the oil station to improve system integration. Add the self-locking function of the on-off butterfly valve. Even if the main oil pump fails, the butterfly valve can be kept in the original position to maintain the original opening, so as to facilitate the online maintenance of the solenoid valve. A three-position four-way solenoid valve, two hydraulically controlled one-way valves, and two regulating valves are used to control the oil cylinder. This method is the control method used on the water spray isolation valve of the bypass system of a relatively mature large unit. The modified circulating water hydraulic control butterfly valve control block mainly consists of a three-position four-way solenoid valve, a superimposed hydraulic control one-way valve, a pressure maintaining valve, a system main oil pump oil inlet one-way valve, a stop valve, a relief valve, a one-way valve and a control integrated block.

[0016] A control method for a hydraulic butterfly valve integrated control device based on a three-position, four-way solenoid valve is proposed. The original control cabinet (PLC module control) is modified by removing the PLC module and replacing the entire electrical control cabinet (keeping the length and width unchanged). The main control logic is as follows: Step 1: Cancel the local PLC control module of the hydraulically controlled butterfly valve and use DCS to realize control The PLC control loop of the local control cabinet is cancelled, and DCS is used to realize all controls of the hydraulically controlled butterfly valve and hydraulic oil pump. The control method remains basically unchanged. Step 2: On-site (button operation on the control box operation panel) Set the operation mode "switch" on the control cabinet operation panel to "local" mode, and the indicator light will be on. Then you can operate the on, off, and stop buttons on the control cabinet to change the energized state of the YV1 and YV2 solenoid valves and control the action of the hydraulically controlled butterfly valve. a. Open the valve: When the "local or remote control" knob switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "open valve" position and issue an opening command to realize local opening. When the 15° opening signal comes, pause and wait for the circulating pump operation signal to be issued before continuing to open the butterfly valve; b. Valve closing: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "close valve" position and issue a closing command to achieve local closing. When the 15° opening signal comes, pause and wait for the pump stop signal to be issued before continuing to close the butterfly valve; c. Stop: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch of the local cabinet to the "stop" position and issue a stop command to achieve an intermediate stop.

[0017] Step 3: Remote (DCS Operation) Set the operation mode "switch" on the control cabinet panel to "remote" mode, the indicator light will light up, and the control cabinet will receive the open, close, and stop commands from the DCS system to achieve interlocked start and stop of the butterfly valve and water pump.

[0018] a. Open valve: The DCS system sends a valve opening signal, and the YV2 solenoid valve is automatically held after being energized. When it reaches the fully open position, the indicator light turns on and the valve opens to 15° as a program-controlled start signal (original); b. Valve closing: The DCS system sends a valve closing signal, and the YV1 solenoid valve is automatically held after being energized. When it reaches the fully closed position, the indicator light turns on and the valve opens 15 degrees as a program-controlled stop signal (original); c. Stop: The DCS system issues a butterfly valve stop command, the YV1 and YV2 solenoid valves lose power, the oil circuit is cut off, and the butterfly valve stops moving (original).

[0019] Step 4: Automatic oil filling circuit The oil pump interlock function knob on the original local control cabinet is changed to an oil pump start / stop command knob. The remote DCS start / stop command and the local start / stop command are connected in parallel, so that the oil pump of the hydraulically controlled butterfly valve oil station can be operated remotely or locally. When the hydraulic oil pressure is lower than the lower limit of the set value, the hydraulic oil pump interlock starts and the oil pump contactor is energized. When the system pressure reaches the upper limit of the set value, the hydraulic oil pump protection stops, the oil pump contactor is disconnected, and automatic oil replenishment ensures that the pressure of the hydraulic system is always within a certain range, providing energy guarantee for the switching butterfly valve.

[0020] Step 5: Short Circuit Protection The protective electrical control cabinet should be equipped with short-circuit protection. The hydraulic oil pump should be replenished with oil. If it runs continuously for more than 10 minutes, the oil pump protection will be triggered and a hydraulic fault alarm signal will be issued. The butterfly valve will not be fully opened or fully closed.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and or combinations thereof.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A hydraulic butterfly valve integrated control device based on a three-position four-way solenoid valve, including an oil station and a control electrical cabinet, characterized in that: The oil station adopts a mutually redundant design to increase oil temperature detection and control. The electrical control cabinet is integrated on the side of the oil station and uses a three-position four-way solenoid valve, two hydraulically controlled one-way valves, and two regulating valves to control the oil cylinder. The circulating water hydraulic control butterfly valve control block includes a three-position four-way solenoid valve, a superimposed hydraulically controlled one-way valve, a pressure maintaining valve, a system main oil pump oil inlet one-way valve, a stop valve, a relief valve, a one-way valve and a control integrated block.

2. A hydraulic butterfly valve integrated control device based on a three-position four-way solenoid valve according to claim 1, characterized in that: Includes an on-off butterfly valve with self-locking function.

3. The control method of a hydraulic butterfly valve integrated control device based on a three-position four-way solenoid valve according to claim 1 is characterized in that: The steps include: Step 1: Use DCS to realize control, and use DCS to realize all controls of hydraulically controlled butterfly valves and hydraulic oil pumps; Step 2: On-site, set the operation mode "switch" on the control cabinet operation panel to "on-site" mode. The indicator light will light up, and you can operate the on, off, and stop buttons on the control cabinet to change the energized state of the YV1 and YV2 solenoid valves and control the action of the hydraulically controlled butterfly valve. a. Open the valve: When the "local or remote control" knob switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "open valve" position and issue an opening command to realize local opening. When the 15° opening signal comes, pause and wait for the circulating pump operation signal to be issued before continuing to open the butterfly valve; b. Valve closing: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "close valve" position and issue a closing command to achieve local closing. When the 15° opening signal comes, pause and wait for the circulation pump stop signal to be issued before continuing to close the butterfly valve; c. Stop: When the "local or remote control" switch on the local panel is switched to local, rotate the "stop, open valve or close valve" knob switch on the local cabinet to the "stop" position and issue a stop command to achieve an intermediate stop. Step 3: Remotely, set the operation mode "switch" on the control cabinet panel to "remote" mode, the indicator light will light up, and the control cabinet will receive the open, close, and stop commands from the DCS system to realize the interlocked start and stop of the butterfly valve and the water pump: a. Open valve: The DCS system sends a valve opening signal, and the YV2 solenoid valve is automatically held after being energized. When it reaches the fully open position, the indicator light turns on and the valve opens to 15° as a program-controlled start signal; b. Valve closing: The DCS system sends a valve closing signal, and the YV1 solenoid valve is automatically held after being energized. When it reaches the fully closed position, the indicator light turns on and the valve opens to 15° as a program-controlled stop signal. c. Stop: The DCS system issues a stop command for the butterfly valve, the YV1 and YV2 solenoid valves lose power, the oil circuit is cut off, and the butterfly valve stops moving; Step 4: Automatic oil replenishment circuit: Change the oil pump interlock function knob on the original local control cabinet to the oil pump start / stop command knob. The remote DCS start / stop command and the local start / stop command are connected in parallel, so that the oil pump of the hydraulically controlled butterfly valve oil station can be operated remotely or locally. When the hydraulic oil pressure is lower than the lower limit of the set value, the hydraulic oil pump interlock starts and the oil pump contactor is energized. When the system pressure reaches the upper limit of the set value, the hydraulic oil pump protection stops, the oil pump contactor is disconnected, and automatic oil replenishment ensures that the pressure of the hydraulic system is always within a certain range, providing energy guarantee for the switching butterfly valve. Step 5: The protective electrical control cabinet should be equipped with short-circuit protection. The hydraulic oil pump should be replenished with oil. If it runs continuously for more than 10 minutes, the oil pump protection stop will be triggered and a hydraulic fault alarm signal will be issued. The butterfly valve is not fully open or fully closed.

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