Gate valve and gate valve control system

Abstract

The invention belongs to the technical field of gate valves, and particularly relates to a gate valve and a gate valve control system, which are used for solving the problems that the gate valve in the prior art cannot monitor and control the opening and closing of the valve in real time and cannot accurately control the flow and the flow velocity. Accurate monitoring of the airflow velocity and flow is achieved, the control system achieves accurate control of the airflow velocity and flow by adjusting the air pressure input of the air pushing module and the operation state of the compressor module according to the set expected flow and the flow velocity target value, and the flow velocity and flow of the airflow are accurately controlled by continuously monitoring the deviation between the actual value and the set target value. And the air pressure input of the air pushing module is finely adjusted, the control precision of the system is optimized, the response speed of the system is improved by adjusting the parameters of the control system, optimizing the control parameters and adjusting the response characteristics of an actuator, and it is ensured that the system can quickly and accurately respond to external changes.

Description

Technical Field

[0001] The invention belongs to the technical field of gate valves, and in particular relates to a gate valve and a gate valve control system. Background Art

[0002] A gate valve is a device used to control the flow, pressure and flow direction of a fluid (liquid, gas, gas-liquid or solid-liquid mixture). It is usually composed of a valve body, a valve cover, a valve seat, an opening and closing member, a driving mechanism, a seal and fasteners. The control function of the valve is achieved by driving the opening and closing member to lift, slide, swing or rotate by the driving mechanism or fluid to change the size of the flow channel area. Rotary gate valves have been widely used in many industrial fields due to their simple structure, easy operation, small size, light weight, easy installation and maintenance, etc. They are mainly used in pipeline control. In pipeline systems, rotary gate valves are used to control the flow rate and flow of gases.

[0003] In the prior art, many gate valves require manual operation and cannot be used directly in automatic systems. Even though there are some electric gate valves, they have certain limitations in real-time monitoring and precise control of flow and flow rate. Due to the design and working principle of gate valves, they usually can only provide a limited adjustment range, and it is difficult to achieve continuous and accurate monitoring of gas flow conditions. Gate valves may be affected by gas pressure fluctuations, temperature changes, and valve wear during the adjustment process, all of which may result in unstable and inaccurate control of flow and flow rate. Summary of the invention

[0004] The present invention proposes a gate valve and a gate valve control system. The purpose of the present invention is to provide a gate valve and a gate valve control system. The present invention can monitor the opening and closing status of the valve in real time and feed back these signals to the control system. By controlling the algorithm and adjusting the air pressure input of the air propulsion module, the required flow rate and flow velocity can be accurately controlled, thereby improving the response speed and control accuracy of the system.

[0005] The technical scheme of the present invention is as follows: a gate valve, comprising a valve plate, a valve body, a manual actuator, an automatic actuator and a rotation-stopping device, wherein a valve stem is fixed on the manual actuator, a convex strip is fixed on the valve stem, an output rod is provided on the automatic actuator, a chain is meshed on the output rod, another part of the chain is meshed with a gear, a driven rod is fixedly sleeved on the gear, one end of the driven rod is fixed to one end of the valve stem, the valve plate is in a multi-leaf shape, the valve plate is fixedly sleeved on the valve stem, an air outlet is provided on one side of the valve body, and an air inlet is provided on the other side; The anti-rotation device includes a support plate, a slide groove, a transverse rod and a limit frame. The number of the support plates is two and they are fixed on the valve body. The number of the slide grooves is two and they are opened on the inner walls of the two support plates. The transverse rod is slidably installed in the slide groove, and the limit frame is fixed in the middle position of the transverse rod. Among them, the automatic actuator is a motor, and the manual actuator is a hand wheel. Both actuators are used to control the rotation of the valve plate.

[0006] A gate valve control system, comprising a gate valve device and an air source system, an execution system and a detection feedback system installed on the gate valve device, wherein the air source system, the execution system and the detection feedback system are respectively connected to the control system; The gas source system comprises: Compressor module: used to compress the gas entering the gate valve inlet, providing the third power source for the entire system; Gas storage module: used to store compressed gas, ensure stable gas pressure, and release it as power when needed; Regulation module: used to regulate the stored high-pressure gas to a pressure range suitable for the rotary airlock valve; Purification module: used to remove impurities and moisture in compressed gas to ensure gas quality; The execution system comprises: Air push module: used to convert air pressure energy into mechanical energy, drive the rotation of the valve plate, and control the opening and closing of the valve; Manual crank module: used for precise manual rotation force, making the valve plate rotation more delicate; Electric drive module: used to convert electrical energy into mechanical energy accurately and efficiently; The control system comprises: Central processing unit module: responsible for executing user programs of each system, performing data processing and sequence control; Input module: used to receive signals from various systems and convert them into digital signals that can be processed within the control system; Output module: used to convert the digital signal processed inside the control system into a signal that can be recognized by the components; Communication module: used to realize data exchange and communication between the control system and other systems; Special function module: used to monitor and control the flow rate of the air flow in the valve body through the valve plate flow meter; The detection feedback system comprises: Position detection module: used to monitor the opening and closing status of the valve in real time through the position sensor, and feed these signals back to the control system; Pressure detection module: used to monitor the gas pressure in the gas supply system and the execution system in real time through the pressure sensor to ensure the stability of the gas pressure; Signal processing and conversion module: used to amplify, filter, convert and process the signals output by the two sensors so that the control system can accurately read and identify them; Fault alarm module: used to determine whether there is a fault in the system based on the detected signal and the preset threshold, and cut off the signal transmission and stop working.

[0007] Furthermore, the air flow velocity and flow rate inside the gate valve are monitored as follows: The valve plate flow meter calculates the flow rate by measuring the rotation speed of the valve plate; In the flow range of 4~40 m³ / h, the rotation speed of the valve plate is proportional to the flow rate, and the flow rate, flow velocity and pipe cross-sectional area of ​​the valve body tend to increase; The flow calculation formula is: Q=(N∙A) / (60∙η) The flow rate calculation formula is: v=Q / A Among them, Q is the flow rate (m³ / h), N is the speed of the turbine (r / min), A is the cross-sectional area of ​​the valve body pipeline (m²), η is the efficiency of the valve plate, and V is the flow velocity (m / s).

[0008] Furthermore, the flow rate of the air flow inside the gate valve is controlled as follows: Set the desired flow and velocity target values ​​according to system requirements; The control system adjusts the air pressure input of the air propulsion module according to the output of the control algorithm, changes the operating state of the compressor module, and adjusts the air pressure through the regulating module to achieve the required flow rate and flow velocity; The actual flow rate and velocity are continuously monitored by the detection feedback system and compared with the set target value. The deviation will be used as feedback to further fine-tune the air pressure input of the air propulsion module. By adjusting the control system parameters, optimizing the control parameters and adjusting the response characteristics of the actuator, the response speed and control accuracy of the system can be improved.

[0009] The beneficial effects of the present invention are: The present invention calculates the flow rate by accurately measuring the rotation speed of the valve plate through the control system, and realizes accurate monitoring of the air flow velocity and flow rate by combining the flow rate calculation formula. The control system realizes accurate control of the air flow velocity and flow rate by adjusting the air pressure input of the air propulsion module and the operating state of the compressor module according to the set expected flow rate and flow rate target value. The system control accuracy is further optimized by continuously monitoring the deviation between the actual value and the set target value and fine-tuning the air pressure input of the air propulsion module. By adjusting the control system parameters, the control parameters can be optimized and the response characteristics of the adjustment actuator can be adjusted, thereby improving the response speed of the system, ensuring that the system can respond to external changes quickly and accurately to meet practical application needs. In the present invention, when the flow rate or flow exceeds a preset safety threshold, the fault alarm module will immediately sound an alarm, cut off the signal transmission, and stop working, thereby effectively preventing equipment damage or safety accidents caused by excessive airflow. According to the real-time monitoring data, the control system can automatically adjust the air pressure input of the air push module to ensure that the air flow rate and flow rate always remain within a safe and stable range, further improving the stability and safety of the system operation. Through real-time monitoring of the air flow rate and flow rate inside the gate valve, abnormal situations can be discovered and handled in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0011] Figure 1 It is a schematic diagram of the overall structure of a gate valve of the present invention; Figure 2 This is a schematic diagram of the internal structure of a gate valve of the present invention; Figure 3 This is a principle block diagram of a gate valve control system of the present invention; Figure 4 This is a step diagram of a method for controlling the flow velocity and flow rate of air flow inside a gate valve by a gate valve control system of the present invention.

[0012] In the figure: 1, manual actuator; 2, valve stem; 3, support plate; 4, slide groove; 5, transverse rod; 6, limit frame; 7, convex strip; 8, automatic actuator; 9, output rod; 10, chain; 11, gear; 12, driven rod; 13, valve plate; 14, valve body; 141, air outlet; 142, air inlet; 15. Gas source system; 151. Compressor module; 152. Gas storage module; 153. Adjustment module; 154. Purification module; 16. Execution system; 161. Air push module; 162. Hand crank module; 163. Electric drive module; 17. Control system; 171. Central processing unit module; 172. Input module; 173. Output module; 174. Communication module; 175. Special function module; 18. Detection feedback system; 181. Position detection module; 182. Pressure detection module; 183. Signal processing conversion module; 184. Fault alarm module. DETAILED DESCRIPTION

[0013] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Example 1 like Figure 1~Figure 2 As shown, this embodiment proposes a gate valve, including a valve plate 13, a valve body 14, a manual actuator 1, an automatic actuator 8 and a rotation-stopping device, the manual actuator 1 is fixed with a valve stem 2, the valve stem 2 is fixed with a convex strip 7, the automatic actuator 8 is equipped with an output rod 9, the output rod 9 is meshed with a chain 10, the other part of the chain 10 is meshed with a gear 11, the gear 11 is fixedly sleeved with a driven rod 12, one end of the driven rod 12 is fixed to one end of the valve stem 2, the valve plate 13 is in a multi-leaf shape, the valve plate 13 is fixedly sleeved on the valve stem 2, one side of the valve body 14 is provided with an air outlet 141, and the other side is provided with an air inlet 142; The anti-rotation device includes a support plate 3, a slide groove 4, a transverse rod 5 and a limit frame 6. The number of the support plates 3 is two, which are fixed on the valve body 14. The number of the slide grooves 4 is two, which are opened on the inner walls of the two support plates 3. The transverse rod 5 is slidably installed in the slide groove 4, and the limit frame 6 is fixed at the middle position of the transverse rod 5. The automatic actuator 8 is a motor, and the manual actuator 1 is a hand-cranked wheel. Both actuators are used to control the rotation of the valve plate 13 .

[0015] In this embodiment, the valve plate 13 is the core component of the gate valve, which is used to control the flow of the fluid. The valve plate 13 is in a multi-blade shape and can rotate around the valve stem 2, thereby controlling the amount of fluid passing through the valve body 14. The valve body 14 is the outer shell of the gate valve, which is used to accommodate the valve plate 13 and other components. It usually has an air inlet 142 and an air outlet 141 for the entry and discharge of the fluid. The manual actuator 1 is used to control the opening and closing of the valve plate 13 through manual operation when there is no electricity or other automatic control means. The hand wheel can manually rotate the valve plate 13 through the connection between the valve stem 2 and the convex strip 7. The automatic actuator 8 is used to control the opening and closing of the valve plate 13 through electricity or other automatic control means. The motor drives the gear 11 and the driven rod 12 through the connection between the output rod 9 and the chain 10, thereby controlling the rotation of the valve plate 13; The anti-rotation device is used to limit the rotation of the valve plate 13 to prevent the valve plate 13 from excessive rotation due to improper operation or other reasons, thereby protecting the valve and the pipeline system. The support plate 3 is fixed on the valve body 14, and the slide groove 4 is opened on the inner wall of the support plate 3. The transverse rod 5 slides in the slide groove 4. The limit frame 6 is fixed in the middle position of the transverse rod 5 to limit the movement range of the transverse rod 5. The valve stem 2 is a component connecting the manual actuator 1 and the valve plate 13. It is fixed to the valve plate 13 through the convex strip 7 and controls the rotation of the valve plate 13 through the drive of the manual or automatic actuator 8. The convex strip 7 is fixed on the valve stem 2 and is connected to the valve plate 13 is fixedly connected and is the intermediate component for the manual actuator 1 to operate the valve plate 13. The output rod 9 is a part of the automatic actuator 8. It transmits the rotational force of the motor to the driven rod 12 through the meshing of the chain 10 and the gear 11, thereby controlling the rotation of the valve plate 13. The chain 10 connects the output rod 9 and the gear 11 to transmit the rotational force of the motor. The gear 11 meshes with the chain 10 to transmit the force of the chain 10 to the driven rod 12. One end of the driven rod 12 is fixed to the valve stem 2, and the other end is fixed to the gear 11. It transmits the rotational force of the gear 11 to the valve stem 2, thereby controlling the rotation of the valve plate 13.

[0016] Example 2 like Figure 3~Figure 4 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes a gate valve control system 17, which includes a gate valve device and an air source system 15, an execution system 16 and a detection feedback system 18 installed on the gate valve device, and the air source system 15, the execution system 16 and the detection feedback system 18 are respectively connected to the control system 17; The gas source system 15 comprises: Compressor module 151: used to compress the gas entering the gate valve air inlet 142, providing a third power source for the entire system; Gas storage module 152: used to store compressed gas to ensure stable gas pressure and release it as power when needed; Adjustment module 153: used to adjust the stored high-pressure gas to a pressure range suitable for the rotary airlock valve; Purification module 154: used to remove impurities and moisture in the compressed gas to ensure gas quality; The execution system 16 includes: Air push module 161: used to convert air pressure energy into mechanical energy, drive the rotation of the valve plate 13, and control the opening and closing of the valve; Manual crank module 162: used for precise manual rotation force, so that the valve plate 13 rotates more delicately; Electric drive module 163: used to convert electrical energy into mechanical energy accurately and efficiently; The control system 17 includes: Central processing unit module 171: responsible for executing various system user programs, performing data processing and sequence control; Input module 172: used to receive signals from various systems and convert them into digital signals that can be processed within the control system 17; Output module 173: used to convert the digital signal processed inside the control system 17 into a signal that can be recognized by the components; Communication module 174: used to realize data exchange and communication between the control system 17 and other systems; Special function module 175: used to monitor and control the flow rate of the air flow in the valve body 14 through the flow meter of the valve plate 13; The detection feedback system 18 includes: Position detection module 181: used to monitor the opening and closing status of the valve in real time through a position sensor, and feed back these signals to the control system 17; Pressure detection module 182: used to monitor the gas pressure in the gas supply system and the execution system 16 in real time through a pressure sensor to ensure stable gas pressure; Signal processing and conversion module 183: used to amplify, filter, convert and process the signals output by the two sensors so that the control system 17 can accurately read and identify them; Fault alarm module 184: used to determine whether there is a fault in the system based on the detected signal and the preset threshold value, and cut off the signal transmission and stop working.

[0017] The present invention also provides a gate valve control system 17 for monitoring the flow rate of the airflow inside the gate valve, as follows: The valve plate 13 flow meter calculates the flow rate by measuring the rotation speed of the valve plate 13; In the flow range of 4~40 m³ / h, the rotation speed of the valve plate 13 is proportional to the flow rate, and the flow rate, flow velocity and the pipe cross-sectional area of ​​the valve body 14 tend to increase progressively; The flow calculation formula is: Q=(N∙A) / (60∙η) The flow rate calculation formula is: v=Q / A Among them, Q is the flow rate (m³ / h), N is the speed of the turbine (r / min), A is the cross-sectional area of ​​the valve body 14 pipeline (m²), η is the efficiency of the valve plate 13, and V is the flow velocity (m / s).

[0018] Specifically: The sensor in the position detection module 181 measures the rotation speed N of the valve plate 13 in real time; The sensor in the pressure detection module 182 measures the gas pressure in the gas supply system and the execution system 16 in real time; The valve plate 13 flow meter in the special function module 175 uses the flow calculation formula Q=N⋅A / 60⋅η to calculate the flow Q, where N is the rotation speed of the valve plate 13, A is the cross-sectional area of ​​the valve body 14 pipeline, and η is the efficiency of the valve plate 13; Calculate flow rate: Use the flow rate calculation formula V=Q / A to calculate the flow rate, Q is the flow rate, A is the cross-sectional area of ​​the valve body 14 pipeline; The signal processing conversion module 183 amplifies, filters, converts, and processes the signals output by the position detection module 181 and the pressure detection module 182 to ensure that the control system 17 can accurately read and identify these signals; The communication module 174 exchanges and communicates the processed data with other systems for further analysis or control; The fault alarm module 184 determines whether the system has a fault based on the detected signal and a preset threshold value. If a fault is detected, the module cuts off the transmission of the signal and stops working, and sounds an alarm.

[0019] Examples: Assume the following parameters: The speed of the valve plate 13 is N=1200 r / min; The cross-sectional area of ​​the valve body 14 pipeline is A = 0.1 m²; The efficiency of the valve plate 13 is η=0.8; First, the position detection module 181 measures that the rotation speed of the valve plate 13 is 1200 r / min, and then the special function module 175 calculates the flow rate using the flow calculation formula: Q=1200⋅0⋅1 / 60⋅0⋅8=40 m³ / h Calculate the flow rate using the flow rate calculation formula: V=2.5 / 0.1=25m / s The calculation results are then processed by the signal processing conversion module 183 and shared with other systems by the communication module 174. If the flow rate or flow exceeds the preset safety range, the fault alarm module 184 will sound an alarm and take necessary safety measures.

[0020] The present invention also provides a gate valve control system 17 for controlling the flow rate of airflow inside the gate valve, comprising the following steps: Step S1: setting the desired flow rate and flow rate target value according to system requirements; Step S2: the control system 17 adjusts the air pressure input of the air propulsion module 161 according to the output of the control algorithm, changes the operating state of the compressor module 151, and adjusts the air pressure through the regulating module 153 to achieve the required flow rate and flow velocity; Step S3: Continuously monitor the actual values ​​of flow rate and flow velocity through the detection feedback system 18 and compare them with the set target values. The deviation will be used as feedback to further fine-tune the air pressure input of the air propulsion module 161; Step S4: By adjusting the parameters of the control system 17, the control parameters are optimized and the response characteristics of the actuator are adjusted to improve the response speed and control accuracy of the system.

[0021] Specifically, by controlling the flow rate and flow rate, equipment damage or safety accidents caused by excessive or low pressure can be prevented. Precise control of airflow can ensure that the system operates at optimal efficiency, reduce energy waste, and improve production efficiency. By optimizing airflow, unnecessary energy consumption can be reduced, operating costs can be reduced, and the impact on the environment can be reduced. Through real-time monitoring and automatic adjustment, the control system 17 can improve the reliability and stability of the entire system.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gate valve, characterized in that: It includes a valve plate, a valve body, a manual actuator, an automatic actuator and a rotation-stopping device. The manual actuator is fixed with a valve stem, the valve stem is fixed with a convex strip, the automatic actuator is equipped with an output rod, the output rod is meshed with a chain, the other part of the chain is meshed with a gear, a driven rod is fixedly sleeved on the gear, one end of the driven rod is fixed to one end of the valve stem, the valve plate is in a multi-leaf shape, the valve plate is fixedly sleeved on the valve stem, an air outlet is provided on one side of the valve body, and an air inlet is provided on the other side; The anti-rotation device includes a support plate, a slide groove, a transverse rod and a limit frame. The number of the support plates is two and they are fixed on the valve body. The number of the slide grooves is two and they are opened on the inner walls of the two support plates. The transverse rod is slidably installed in the slide groove, and the limit frame is fixed in the middle position of the transverse rod. Among them, the automatic actuator is a motor, and the manual actuator is a hand wheel. Both actuators are used to control the rotation of the valve plate.

2. A gate valve control system, characterized in that: The gate valve control system includes a gate valve device and an air source system, an execution system and a detection feedback system installed on the gate valve device, wherein the air source system, the execution system and the detection feedback system are respectively connected to the control system; The gas source system comprises: Compressor module: used to compress the gas entering the gate valve inlet, providing the third power source for the entire system; Gas storage module: used to store compressed gas, ensure stable gas pressure, and release it as power when needed; Regulation module: used to regulate the stored high-pressure gas to a pressure range suitable for the rotary airlock valve; Purification module: used to remove impurities and moisture in compressed gas to ensure gas quality; The execution system comprises: Air push module: used to convert air pressure energy into mechanical energy, drive the rotation of the valve plate, and control the opening and closing of the valve; Manual crank module: used for precise manual rotation force, making the valve plate rotation more delicate; Electric drive module: used to convert electrical energy into mechanical energy accurately and efficiently; The control system comprises: Central processing unit module: responsible for executing user programs of each system, performing data processing and sequence control; Input module: used to receive signals from various systems and convert them into digital signals that can be processed within the control system; Output module: used to convert the digital signal processed inside the control system into a signal that can be recognized by the components; Communication module: used to realize data exchange and communication between the control system and other systems; Special function module: used to monitor and control the flow rate of the air flow in the valve body through the valve plate flow meter; The detection feedback system comprises: Position detection module: used to monitor the opening and closing status of the valve in real time through the position sensor, and feed these signals back to the control system; Pressure detection module: used to monitor the gas pressure in the gas supply system and the execution system in real time through the pressure sensor to ensure the stability of the gas pressure; Signal processing and conversion module: used to amplify, filter, convert and process the signals output by the two sensors so that the control system can accurately read and identify them; Fault alarm module: used to determine whether there is a fault in the system based on the detected signal and the preset threshold, and cut off the signal transmission and stop working.

3. A gate valve control system according to claim 2, characterized in that: Monitor the air flow velocity and flow rate inside the gate valve, as follows: The valve plate flow meter calculates the flow rate by measuring the rotation speed of the valve plate; In the flow range of 4~40 m³ / h, the rotation speed of the valve plate is proportional to the flow rate, and the flow rate, flow velocity and pipe cross-sectional area of ​​the valve body tend to increase; The flow calculation formula is: Q=(N∙A) / (60∙η) The flow rate calculation formula is: v=Q / A Among them, Q is the flow rate (m³ / h), N is the speed of the turbine (r / min), A is the cross-sectional area of ​​the valve body pipeline (m²), η is the efficiency of the valve plate, and V is the flow velocity (m / s).

4. A gate valve control system according to claim 3, characterized in that: The flow rate of the air flow inside the gate valve is controlled as follows: Set the desired flow and velocity target values ​​according to system requirements; The control system adjusts the air pressure input of the air propulsion module according to the output of the control algorithm, changes the operating state of the compressor module, and adjusts the air pressure through the regulating module to achieve the required flow rate and flow velocity; The actual flow rate and velocity are continuously monitored by the detection feedback system and compared with the set target value. The deviation will be used as feedback to further fine-tune the air pressure input of the air propulsion module. By adjusting the control system parameters, optimizing the control parameters and adjusting the response characteristics of the actuator, the response speed and control accuracy of the system can be improved.

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