Intelligent opening and closing hydraulic pressure maintaining control device and system for explosion-proof cover of ventilator

Abstract

The invention discloses a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control device and a system thereof, and relates to the technical field of hydraulic pressure maintaining, and the technical scheme is characterized in that the ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control device comprises a hydraulic station box body, a mining explosion-proof motor is arranged on the surface of the hydraulic station box body, and a plunger pump is arranged at the output end of the mining explosion-proof motor; a three-position four-way electromagnetic valve, a pilot overflow valve and a stacked throttle valve are arranged on the surface of the hydraulic station box body, an energy accumulator is arranged on one side of the hydraulic station box body, a hydraulic tank is connected to one side of the energy accumulator, and an anti-explosion cover ventilation opening is formed in one side of the hydraulic station box body. Four sets of installation frames are arranged on the periphery of the ventilation opening of the anti-explosion cover in an array mode, each installation frame is provided with an opening and closing oil cylinder, and a synchronous motor is arranged on one side of the hydraulic station box body, so that the system has the advantages that the reliability of the system is further improved, and it is guaranteed that the system is provided with a standby power source used for driving the anti-explosion cover to be normally opened and closed when the whole field is powered off.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic pressure maintenance, and more specifically, to a hydraulic pressure maintenance control device for intelligently opening and closing an explosion-proof cover of a ventilator and a system thereof. Background Art

[0002] Mine explosion-proof doors are one of the most important safety components of mine ventilation systems. They refer to explosion-proof covers installed at the air outlets of the main fans to prevent the expansion of underground methane explosion accidents. They protect the fans and enable disaster relief work to proceed normally. In high-risk operating environments such as mining and tunnel construction, fans are important equipment for ensuring the air quality in the operating areas. Their stable operation is crucial to the life safety of operators.

[0003] During the use of ventilators, the opening and closing control of explosion-proof covers is extremely important. Traditional explosion-proof covers of ventilators have many problems such as many people, long time, difficult reset, and cumbersome operation during the opening and closing and reverse wind process. Especially when the whole site is out of power, the explosion-proof cover cannot be opened and closed normally, which brings great hidden dangers to the ventilation safety of the mine.

[0004] Therefore, in order to solve the above technical problems, the present application proposes a hydraulic pressure maintaining control device and system for intelligent opening and closing of a fan explosion-proof cover. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a hydraulic pressure maintaining control device and system for intelligent opening and closing of a ventilator explosion-proof cover.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic pressure maintaining control device for intelligent opening and closing of explosion-proof cover of a ventilator, comprising a hydraulic station box, a mine-use flameproof motor is arranged on the surface of the hydraulic station box, a plunger pump is arranged at the output end of the mine-use flameproof motor, a three-position four-way solenoid valve is arranged on the surface of the hydraulic station box, a pilot overflow valve is arranged on the surface of the hydraulic station box, a superimposed throttle valve is arranged on the surface of the hydraulic station box, an accumulator is arranged on one side of the hydraulic station box, a hydraulic tank is connected to one side of the accumulator, an explosion-proof cover vent is arranged on one side of the hydraulic station box, four groups of mounting frames are arranged in a circular array of the explosion-proof cover vent, each of the mounting frames is provided with an opening and closing cylinder, and a synchronous motor is arranged on one side of the hydraulic station box.

[0007] Preferably, the synchronous motor is a device for realizing synchronous movement of multiple actuators, is synchronously connected to the four groups of cylinders, and is composed of multiple hydraulic motor units. These units are interconnected by mechanical or hydraulic connections so that they can maintain synchronous movement during operation. When the hydraulic oil enters the synchronous motor, the oil is evenly distributed to each motor unit through the internal distribution mechanism, driving each actuator to move at the same speed and torque. A return pipe is provided inside the synchronous motor, which forms a loop in the system, so that excess hydraulic oil can flow back to the oil tank to keep the system pressure stable. At the same time, the return pipe can also play a role in heat dissipation and filtering, thereby improving the reliability and life of the system.

[0008] Preferably, a pressure sensor is provided on the side of the hydraulic station box, and the pressure sensor is connected to the explosion-proof cover vent. A pressure gauge is provided on the top of the accumulator. The dual pressure control design is to ensure the safety, accuracy and reliability of the measurement, display and control of the hydraulic system pressure. The pressure sensor and the pointer pressure gauge are combined. Even if one is damaged, it will not affect the normal use of the hydraulic system, thereby ensuring the reliability of the system. The analog signal of the pressure is given to the PLC analog interface of the mining explosion-proof and intrinsically safe control box, and the system pressure is displayed on the monitoring system. It is also used as an important basis for automatically controlling the oil pump. Combined with the corresponding protection program, multiple protections are implemented for the hydraulic system, such as power-on monitoring, sensor disconnection and short-circuit protection, fault alarm, leakage protection, high and low pressure protection, etc., to ensure the safety and reliability of the hydraulic system.

[0009] A ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system, comprising: A power unit, including an axial piston pump, which provides a power source for the hydraulic system and converts mechanical energy into pressure energy of hydraulic oil through motor drive, including a mine flameproof motor, which provides power for the axial piston pump to ensure safe operation in an inflammable and explosive environment, including a dual manual emergency hydraulic pump, which manually provides pressure oil in the event of power failure or other emergency situations to ensure basic operation of the system; A control unit, including a stacking throttle valve, which controls the flow direction of the hydraulic oil and allows the oil to flow in only one direction to prevent backflow, a pilot relief valve, which is used as a safety valve and automatically opens when the system pressure exceeds a set value to release excess pressure oil and protect the system from damage by excessive pressure, and an auxiliary manual three-position four-way solenoid valve, which controls the flow direction of the hydraulic oil through an electromagnetic signal to achieve remote control of the actuator; The execution unit includes a four-way hydraulic synchronous motor connected to four groups of oil cylinders, converting the pressure energy of the hydraulic oil into mechanical energy, driving the oil cylinders to drive the opening and closing of the explosion-proof cover of the ventilator, and including four groups of oil cylinders. The oil cylinders serve as actuators to directly push the opening and closing of the explosion-proof cover of the ventilator to complete the mechanical movement; The monitoring unit includes a pressure sensor, which monitors the pressure in the hydraulic system in real time to ensure that the pressure is within a safe range, and an accumulator, which stores and releases pressure oil to balance pressure fluctuations in the system.

[0010] Preferably, when the power supply of the ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system is normal, the pressure gauge and analog pressure sensor simultaneously monitor and control the hydraulic system pressure in real time to ensure the reliability of the sensor or pressure control.

[0011] Preferably, the plunger pump can work under high pressure and has a large output flow rate, and the flow rate regulation can be steplessly adjusted by adjusting the angle of the swash plate, and has high reliability and long life.

[0012] Preferably, the three-position four-way solenoid valve has three working positions and four ports, which can realize the switching of fluid flow direction and the control of the system. The manual auxiliary function provides manual operation mode in emergency situations or power failures. The pilot relief valve is mainly used to control the system pressure. Through the cooperation of the pilot valve and the main valve, the system pressure can be accurately adjusted and stabilized. It has the characteristics of high pressure regulation accuracy, fast response speed and good stability. The superimposed throttle valve is used to adjust the flow in the hydraulic system. The flow size is controlled by changing the flow area of ​​the throttle port. The flow regulation accuracy is high, the reliability is high and the response speed is fast. The three-position four-way solenoid valve, the pilot relief valve and the superimposed throttle valve together constitute a control unit in the system.

[0013] Preferably, the dual manual emergency hydraulic pump is used to provide hydraulic power equipment in an emergency situation, serving as a backup power source for the system to ensure that the hydraulic system can still operate normally in the event of a power failure or other emergency situations.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the hydraulic pressure maintaining system of the intelligent opening and closing anti-wind control device of the explosion-proof cover of the fan can significantly improve the safety performance of the fan by virtue of its significant advantages such as stable pressure, high reliability and fast response speed. Among them, the axial piston pump provides powerful power support for the system with its high pressure, high efficiency and stepless flow regulation; the three-position four-way solenoid valve with manual auxiliary function ensures the reliability and safety of the system in an emergency; the pilot relief valve accurately adjusts and stabilizes the system pressure, further improving the stability of the system, and the superimposed throttle valve realizes precise control of the flow, and the throttle valve effectively prevents the accidental movement of the two-way cylinder, thereby improving the safety of the system. The large-flow synchronous motor ensures the synchronous movement of multiple actuators and improves the working efficiency of the system. In addition, the bladder accumulator plays an important role in voltage stabilization, energy saving, buffering and emergency power source. The dual pressure control design improves the reliability of system pressure measurement, display and control, and ensures the safe operation of the system. Finally, the hydraulic manual emergency pump provides backup power in an emergency. The two manual emergency pumps further improve the reliability of the system, ensuring that when the whole site is out of power, the system has a backup power source to drive the normal opening and closing of the explosion-proof cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the device of the present invention; Figure 2 It is a schematic diagram of the back structure of some devices in the present invention; Figure 3 It is a hydraulic system diagram in the present invention.

[0016] 1. Hydraulic station box; 2. Mining flameproof motor; 3. Plunger pump; 4. Three-position four-way solenoid valve; 5. Pilot relief valve; 6. Superimposed throttle valve; 7. Accumulator; 8. Hydraulic tank; 9. Synchronous motor; 10. Double manual emergency hydraulic pump; 11. Explosion-proof cover vent; 12. Mounting bracket; 13. Opening and closing cylinder; 14. Pressure sensor; 15. Pressure gauge. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 2As shown, the present invention provides an intelligent opening and closing hydraulic pressure maintaining control device for explosion-proof cover of a ventilator, comprising a hydraulic station box 1, a mine flameproof motor 2 is provided on the surface of the hydraulic station box 1, a plunger pump 3 is provided at the output end of the mine flameproof motor 2, a three-position four-way solenoid valve 4 is provided on the surface of the hydraulic station box 1, a pilot relief valve 5 is provided on the surface of the hydraulic station box 1, a superimposed throttle valve 6 is provided on the surface of the hydraulic station box 1, an accumulator 7 is provided on one side of the hydraulic station box 1, a hydraulic tank 8 is connected to one side of the accumulator 7, an explosion-proof cover vent 11 is provided on one side of the hydraulic station box 1, four groups of mounting frames 12 are provided in the circumferential array of the explosion-proof cover vent 11, each mounting frame 12 is provided with an opening and closing oil cylinder 13, a synchronous motor 9 is provided on one side of the hydraulic station box 1, and the synchronous motor 9 is used to realize the synchronous movement of multiple actuators. The synchronous motor 9 is synchronously connected with the four groups of opening and closing oil cylinders 13 and consists of multiple hydraulic motor units. These units are interconnected through mechanical or hydraulic connections so that they can maintain synchronous movement during operation.

[0018] A pressure sensor 14 is provided on the side of the hydraulic station box 1, and the pressure sensor 14 is connected to the explosion-proof cover vent 11. A pressure gauge 15 is provided on the top of the accumulator 7. The dual pressure control design combines the pressure sensor 14 and the pointer pressure gauge 15. Even if one is damaged, it will not affect the normal use of the device.

[0019] Working principle: The pressure in the well is monitored in real time through the pressure sensor 14. When the pressure in the well is in an abnormal range, the mining explosion-proof motor 2 is started, and at the same time, the plunger pump 3 transfers hydraulic oil to the three-position four-way solenoid valve 4, the pilot relief valve 5, and the superimposed throttle valve 6, and transfers the hydraulic oil to the four groups of opening and closing cylinders 13, starting the opening and closing cylinders 13, thereby realizing the opening and closing of the explosion-proof cover controlled by the opening and closing cylinders 13.

[0020] like Figure 3 As shown, the present invention provides a hydraulic pressure-maintaining control system for intelligent opening and closing of a ventilator explosion-proof cover, comprising: The power unit includes an axial piston pump 3, which provides a power source for the hydraulic system. The mechanical energy is converted into the pressure energy of the hydraulic oil through the motor drive. The piston pump 3 can work under high pressure and has a large output flow rate. The flow rate can be adjusted steplessly by adjusting the angle of the swash plate. It has high reliability and long life. It includes a mining flameproof motor 2, which provides power for the axial piston pump 3 to ensure safe operation in flammable and explosive environments. It includes a dual manual emergency hydraulic pump 10. The dual manual emergency hydraulic pump 10 manually provides pressure oil in the event of power failure or other emergency situations to ensure the basic operation of the system. The dual manual emergency hydraulic pump 10 is a device for providing hydraulic power in an emergency. It serves as a backup power source for the system to ensure that the hydraulic system can still work normally in the event of power failure or other emergency situations. The control unit includes a stacking throttle valve 6, which controls the flow direction of the hydraulic oil and allows the oil to flow in only one direction to prevent backflow. The pilot relief valve 5 is used as a safety valve. When the system pressure exceeds the set value, it automatically opens to release the excess pressure oil and protect the system from damage caused by excessive pressure. The three-position four-way solenoid valve 4 with auxiliary manual control controls the flow direction of the hydraulic oil through electromagnetic signals to achieve remote control of the actuator. The three-position four-way solenoid valve 4 has three working positions and four ports, which can realize the flow direction switching of the fluid and the control of the system. The manual auxiliary function provides a manual operation mode in an emergency or power failure. The pilot relief valve 5 is mainly used to control the system pressure. Through the cooperation of the pilot valve and the main valve, the system pressure is accurately adjusted and stabilized. It has the characteristics of high pressure regulation accuracy, fast response speed, good stability, etc. The stacking throttle valve 6 is used to adjust the flow in the hydraulic system. The flow size is controlled by changing the flow area of ​​the throttle port. The flow regulation accuracy is high, the reliability is high, and the response speed is fast; The execution unit includes a four-way hydraulic synchronous motor 9, which is connected to four groups of opening and closing oil cylinders 13, converts the pressure energy of the hydraulic oil into mechanical energy, drives the opening and closing oil cylinders 13 to drive the opening and closing of the explosion-proof cover of the fan, and includes four groups of opening and closing oil cylinders 13. The opening and closing oil cylinders 13 serve as execution elements to directly push the opening and closing of the explosion-proof cover of the fan to complete the mechanical movement; The monitoring unit includes a pressure sensor 14, which monitors the pressure in the hydraulic system in real time to ensure that the pressure is within a safe range. The dual manual emergency hydraulic pump 10 is a device used to provide hydraulic power in an emergency, and serves as a backup power source for the system to ensure that the hydraulic system can still work normally in the event of a power failure or other emergency. It also includes an accumulator 7, which stores and releases pressure oil to balance the pressure fluctuations in the system. The accumulator 7 is a device that can store and release hydraulic energy. It is composed of a shell, a bladder, an air charging valve and other parts, and can achieve functions such as storing hydraulic energy, stabilizing pressure, saving energy, and buffering. Its working principle is based on the compressibility of gas. The bladder is filled with an inert gas (usually nitrogen) with a certain pressure. When the pressure of the hydraulic system increases, the hydraulic oil enters the accumulator 7, compresses the gas in the bladder, and converts the hydraulic energy into the potential energy of the gas and stores it. When the system pressure decreases, the gas in the bladder expands, releases the stored potential energy, replenishes the pressure of the hydraulic system, and plays a role in stabilizing pressure and saving energy.

[0021] When the power supply of the intelligent opening and closing hydraulic pressure maintaining control system of the explosion-proof cover of the ventilator is normal, the pressure gauge 15 and the analog pressure sensor 14 simultaneously monitor and control the pressure of the hydraulic system in real time to ensure the reliability of the pressure sensor 14 or the pressure control. The pressure sensor 14 sends the analog pressure signal to the PLC analog interface of the mining explosion-proof and intrinsically safe control box, displays the system pressure on the monitoring system, and serves as an important basis for automatically controlling the oil pump. Combined with the corresponding protection program, multiple protections are implemented for the hydraulic system, such as power-on monitoring, sensor disconnection and short-circuit protection, fault alarm, leakage protection, high and low pressure protection, etc., to ensure the safety and reliability of the hydraulic system. The pressure control formula of the pressure sensor 14 is P = F / A, where P represents pressure, F is the magnitude of the force, and A is the area of ​​the force.

[0022] Working principle: First, the mining flameproof motor 2 in the power unit drives the axial piston pump 3 to convert mechanical energy into pressure energy of hydraulic oil. At the same time, the manual emergency pressure pump serves as a backup power source to provide pressure oil in case of power failure or other emergency situations.

[0023] Next, the superimposed throttle valve 6 in the control unit ensures that the hydraulic oil can only flow in one direction to prevent backflow. The superimposed throttle valve 6 adjusts the oil flow and controls the speed of the actuator. The pilot relief valve 5 is used as a safety valve. When the system pressure exceeds the set value, it automatically opens to release excess pressure oil and protect the system from damage by excessive pressure. The auxiliary manual three-position four-way solenoid valve 4 controls the flow direction of the hydraulic oil through electromagnetic signals to achieve remote control of the actuator.

[0024] Then, the four-way hydraulic synchronous motor 9 in the execution unit converts the pressure energy of the hydraulic oil into mechanical energy to drive the opening and closing of the fan explosion-proof cover. The oil cylinder acts as an actuator to directly push the opening and closing of the fan explosion-proof cover to achieve mechanical movement.

[0025] Finally, the mining explosion-proof pressure sensor 14 in the monitoring unit monitors the pressure in the hydraulic system in real time to ensure that the pressure is within a safe range. The accumulator 7 stores and releases pressure oil to balance the pressure fluctuations in the system and improve the stability and response speed of the system.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A hydraulic pressure-maintaining control device for intelligent opening and closing of explosion-proof cover of a ventilator, characterized in that: The invention comprises a hydraulic station housing (1), wherein a mine flameproof motor (2) is provided on the surface of the hydraulic station housing (1), a plunger pump (3) is provided at the output end of the mine flameproof motor (2), a three-position four-way solenoid valve (4) is provided on the surface of the hydraulic station housing (1), a pilot relief valve (5) is provided on the surface of the hydraulic station housing (1), a superimposed throttle valve (6) is provided on the surface of the hydraulic station housing (1), an accumulator (7) is provided on one side of the hydraulic station housing (1), a hydraulic tank (8) is connected to one side of the accumulator (7), an explosion-proof cover vent (11) is provided on one side of the hydraulic station housing (1), four groups of mounting frames (12) are provided in a circular array of the explosion-proof cover vent (11), each mounting frame (12) is provided with an opening and closing oil cylinder (13), and a synchronous motor (9) is provided on one side of the hydraulic station housing (1).

2. According to claim 1, a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control device is characterized in that: The synchronous motor (9) is a device for realizing synchronous movement of multiple actuators, is synchronously connected to the four groups of opening and closing cylinders (13), and is composed of multiple hydraulic motor units. These units are interconnected through mechanical or hydraulic connections so that they can maintain synchronous movement during operation.

3. According to claim 2, a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control device and system thereof are characterized in that: A pressure sensor (14) is provided on the side of the hydraulic station box (1), and the pressure sensor (14) is connected to the explosion-proof cover vent (11). A pressure gauge (15) is provided on the top of the accumulator (7).

4. A ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system according to any one of claims 1 to 3, characterized in that: include: The power unit comprises an axial piston pump (3) which provides a power source for the hydraulic system and converts mechanical energy into pressure energy of hydraulic oil through motor drive. The power unit comprises a mining flameproof motor (2) which provides power for the axial piston pump (3) to ensure safe operation in an inflammable and explosive environment. The power unit comprises a dual manual emergency hydraulic pump (10) which manually provides pressure oil in the event of a power failure or other emergency. The control unit comprises a stacked throttle valve (6), the stacked throttle valve (6) controls the flow direction of the hydraulic oil and allows the oil to flow in only one direction, comprises a pilot relief valve (5), the pilot relief valve (5) is used as a safety valve, and automatically opens when the system pressure exceeds a set value to release excess pressure oil, and comprises an auxiliary manual three-position four-way solenoid valve (4), the auxiliary manual three-position four-way solenoid valve (4) controls the flow direction of the hydraulic oil through an electromagnetic signal; The execution unit comprises a four-way hydraulic synchronous motor (9) connected to four groups of opening and closing oil cylinders (13), converting the pressure energy of the hydraulic oil into mechanical energy, driving the opening and closing oil cylinders (13) to operate and drive the opening and closing of the explosion-proof cover of the ventilator, and comprising four groups of opening and closing oil cylinders (13). The opening and closing oil cylinders (13) serve as execution elements and directly drive the opening and closing of the explosion-proof cover of the ventilator to complete the mechanical movement; The monitoring unit comprises a pressure sensor (14) which monitors the pressure in the hydraulic system in real time to ensure that the pressure is within a safe range, and an accumulator (7) which stores and releases pressure oil to balance pressure fluctuations in the system.

5. According to claim 4, a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system is characterized in that: When the power supply of the ventilator explosion-proof cover intelligent opening and closing hydraulic pressure-maintaining control system is normal, the pressure gauge (15) and the analog pressure sensor (14) simultaneously monitor and control the pressure of the hydraulic system in real time. The dual pressure control design adopts a combination of the pressure sensor (14) and the pointer pressure gauge (15). Even if one of them is damaged, it will not affect the normal use of the hydraulic system. The analog pressure signal is given to the PLC analog interface of the mine explosion-proof and intrinsically safe control box, and the system pressure is displayed on the monitoring system. It is used as an important basis for automatically controlling the oil pump. Combined with the corresponding protection program, multiple protections are achieved for the hydraulic system.

6. According to claim 4, a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system is characterized in that: The plunger pump (3) is capable of operating at a high pressure and having a large output flow rate, and the flow rate can be adjusted steplessly by adjusting the angle of the swash plate.

7. According to claim 4, a ventilator explosion-proof cover intelligent opening and closing hydraulic pressure maintaining control system is characterized in that: The three-position four-way solenoid valve (4) has three working positions and four ports, which can realize the switching of fluid flow direction and the control of the system. The manual auxiliary function provides a manual operation mode in an emergency or power failure. The pilot relief valve (5) is mainly used to control the system pressure. The pilot valve and the main valve cooperate to adjust and stabilize the system pressure. The stacking throttle valve (6) is used to adjust the flow in the hydraulic system. The flow size is controlled by changing the flow area of ​​the throttle port. The three-position four-way solenoid valve (4), the pilot relief valve (5) and the stacking throttle valve (6) together constitute a control unit in the system.

8. The intelligent opening and closing hydraulic pressure-maintaining control device and system for the explosion-proof cover of a ventilator according to claim 4, characterized in that: The dual manual emergency hydraulic pump (10) is used to provide hydraulic power in an emergency situation and serves as a backup power source for the system.

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