A hot standby dual-loop control system and method for a brake

Abstract

The present invention provides a hot standby dual-loop control system and method for a brake, which relates to the technical field of brake control. The hot standby dual-loop control system for the brake is provided with two completely identical hydraulic oil circuits. Both hydraulic oil circuits are in an operating state. The hydraulic oil circuit with a larger oil pressure is used as the main working oil circuit to connect a normally closed brake through a balance valve, and the other hydraulic oil circuit is used as the secondary working oil circuit and is in a hot standby state. When the oil pressure in the two hydraulic oil circuits reaches the set upper limit value, the electric motor driving the oil pump is turned off, and the accumulator is used to maintain pressure and store energy. When the oil pressure reaches the set lower limit value, the electric motor driving the oil pump is started, and the electric motor driving the oil pump works intermittently, reducing the system energy consumption. When a failure occurs in one hydraulic oil circuit, the other hydraulic oil circuit in the hot standby state can automatically connect the normally closed brake through the balance valve, realizing seamless connection and switching between the two hydraulic oil circuits. At this time, the normally closed brake is not closed for braking.

Description

Technical Field

[0001] The present invention relates to the technical field of brake control, and particularly to a hot standby dual-loop control system and method for a brake. Background Art

[0002] At present, as the most ideal high-efficiency and continuous transportation equipment, belt conveyors are responsible for the main transportation tasks of materials in mines, power plants, steel mills, tunnels, cement plants and other places. In mine applications, with the emergence of high-yield and high-efficiency working faces in mines and the continuous expansion of the mining scale, the technical performance and safety performance requirements for belt conveyors with long distances and large transportation volumes are also getting higher and higher. Among them, the disc brake, as the braking device of the belt conveyor, can ensure the emergency and smooth braking of the belt conveyor. And as the control system of the disc brake, it plays a key role in the stable and safe operation of the disc brake.

[0003] The control system of the existing brake adopts a "one in use and one standby" design. Under normal working conditions, only one hydraulic oil circuit works, and the other hydraulic oil circuit is in a cold standby state. When a fault occurs in the working hydraulic oil circuit, the brake is of normally closed design. The brake closes and brakes to stop the belt conveyor, and then switches to the other circuit through a manual reversing valve, and the belt conveyor starts to run again. In this way, it is a short-term stop for the brake, but for the running belt conveyor, the occurrence of a fault in any circuit of the brake will cause the belt conveyor to suddenly stop, which will affect the normal operation of the entire conveying and material handling system, resulting in production interruption and even production accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a hot standby dual-loop control system and method for a brake, so that the two hydraulic oil circuits work simultaneously, and when a fault occurs in one hydraulic oil circuit, it can be switched to the other hydraulic oil circuit without the brake closing and braking.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A hot standby dual-loop control system for a brake includes an oil tank, two hydraulic oil circuits, a balance valve, a normally closed brake and a controller;

[0007] The hydraulic oil circuit includes a first hydraulic oil circuit, a second hydraulic oil circuit, and a third hydraulic oil circuit. A fuel pump and a first one-way valve are connected in series in sequence on the first hydraulic oil circuit from the oil inlet end to the oil outlet end. The fuel pump is driven by an electric motor. An electromagnetic directional valve and an electronically controlled oil drain unit are connected in series in sequence on the second hydraulic oil circuit from the oil inlet end to the oil outlet end. The electromagnetic directional valve is used to cut off or conduct the second hydraulic oil circuit. The oil inlet end of the first hydraulic oil circuit and the oil outlet end of the second hydraulic oil circuit are connected to the fuel tank. The oil outlet end of the first hydraulic oil circuit and the oil inlet end of the second hydraulic oil circuit are connected to the third hydraulic oil circuit. An accumulator and a pressure sensor are connected to the third hydraulic oil circuit.

[0008] The balance valve is provided with a V1 port, a V2 port, a C port, a first pilot oil port, and a second pilot oil port. The third hydraulic oil circuit in one hydraulic oil circuit is respectively connected to the V1 port and the first pilot oil port, and the third hydraulic oil circuit in the other hydraulic oil circuit is respectively connected to the V2 port and the second pilot oil port. When the oil pressure at the first pilot oil port is greater than the oil pressure at the second pilot oil port, the balance valve is in the first state position, and the V1 port communicates with the C port. When the oil pressure at the first pilot oil port is less than the oil pressure at the second pilot oil port, the balance valve is in the second state position, and the V2 port communicates with the C port.

[0009] The C port of the balance valve is connected to the oil port of the normally closed brake through a fourth hydraulic oil circuit.

[0010] The controller is respectively connected to the pressure sensor, the electric motor, the electromagnetic directional valve, and the electronically controlled oil drain unit through signal cables.

[0011] Preferably, the electronically controlled oil drain unit includes an electromagnetic proportional valve and a throttle valve arranged in parallel, and the controller is connected to the electromagnetic proportional valve through a signal cable.

[0012] Preferably, a safety valve is connected to the first hydraulic oil circuit on the side of the oil inlet end of the first one-way valve.

[0013] Preferably, the hydraulic oil circuit further includes a fifth hydraulic oil circuit. A manual pump is connected to the fifth hydraulic oil circuit. The oil inlet end of the fifth hydraulic oil circuit is connected to the fuel tank, and the oil outlet end of the fifth hydraulic oil circuit is connected to the first hydraulic oil circuit on the side of the oil inlet end of the first one-way valve.

[0014] Preferably, a second one-way valve is connected to the fifth hydraulic oil circuit on the side of the oil outlet end of the manual pump.

[0015] Preferably, a third one-way valve is connected to the first hydraulic oil circuit on the side of the oil outlet end of the fuel pump.

[0016] Preferably, pressure gauges are connected to both the third hydraulic oil circuit and the fourth hydraulic oil circuit.

[0017] Preferably, an oil filter is connected to the first hydraulic oil circuit.

[0018] Preferably, an air filter is connected to the air inlet end of the fuel tank.

[0019] A hot standby dual-loop control method for a brake, which applies the above-mentioned hot standby dual-loop control system for a brake;

[0020] The method is as follows:

[0021] Step 1: Brake opening and dual-loop hot standby pressure maintaining operation

[0022] Input a brake opening signal to the controller. The controller triggers the motors of the two hydraulic oil circuits to start simultaneously. The electromagnetic directional valve and the electric control oil drain unit are electrified. The controller triggers the electromagnetic directional valve to cut off the second hydraulic oil circuit, and the oil pressure of the third hydraulic oil circuit increases;

[0023] Keep the oil pressure of the third hydraulic oil circuit in one hydraulic oil circuit greater than the oil pressure of the third hydraulic oil circuit in the other hydraulic oil circuit, so that the third hydraulic oil circuit in one hydraulic oil circuit is connected to the normally closed brake through the balance valve and the fourth hydraulic oil circuit. As the oil pressure in the third hydraulic oil circuit increases, the normally closed brake realizes the brake opening action;

[0024] When the pressure sensors in the two hydraulic oil circuits detect that the oil pressure of the third hydraulic oil circuit reaches the set upper limit value, the controller triggers the motors in each hydraulic oil circuit to shut down, and the accumulator maintains pressure and stores energy; when the pressure sensors in the two hydraulic oil circuits detect that the oil pressure of the third hydraulic oil circuit reaches the set lower limit value, the controller triggers the motors in each hydraulic oil circuit to start;

[0025] When a failure occurs in one hydraulic oil circuit, go to Step 2; otherwise, skip Step 2 and go to Step 3;

[0026] Step 2: Automatically switch the hydraulic oil circuit

[0027] The third hydraulic oil circuit in the other hydraulic oil circuit is connected to the normally closed brake through the balance valve and the fourth hydraulic oil circuit;

[0028] Step 3: Brake closing and braking

[0029] Input a brake closing and braking signal to the controller. The controller triggers the electromagnetic directional valve to make the second hydraulic oil circuit conductive. The controller controls the opening degree of the electric control oil drain unit to control the speed of the brake closing and braking until the normally closed brake realizes the brake closing and braking action.

[0030] The beneficial technical effects of the present invention are:

[0031] The hot standby dual-loop control system and method for a brake of the present invention set two completely identical hydraulic oil circuits. Both hydraulic oil circuits are in an operating state. The hydraulic oil circuit with a larger oil pressure is used as the main working oil circuit to connect to a normally closed brake through a balance valve, and the other hydraulic oil circuit is used as a secondary working oil circuit in a hot standby state. When the oil pressure in both hydraulic oil circuits reaches the set upper limit value, the electric motor driving the oil pump shuts down, and the accumulator is used to maintain pressure and store energy. When the oil pressure reaches the set lower limit value, the electric motor driving the oil pump starts, and the electric motor driving the oil pump works intermittently. The loss rates of the hydraulic valve parts, oil pump, and electric motor are relatively low, and the system energy consumption is also reduced. When a failure occurs in one hydraulic oil circuit, the other hydraulic oil circuit in the hot standby state can automatically connect to the normally closed brake through a balance valve, realizing seamless connection and switching between the two hydraulic oil circuits. At this time, the normally closed brake does not close and brake, enabling the belt conveyor to operate without stopping under a fault condition and not affecting the normal operation of the entire conveying and material handling system. In addition, the speed of the brake closing and braking is controlled by the opening degree of the electronic control oil discharge unit. The opening degree of the electronic control oil discharge unit is controlled by the controller according to the working conditions to achieve intelligent braking, controllable braking, soft braking, and emergency braking of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 FIG. is a hydraulic control schematic diagram of the hot standby dual-loop control system for a brake according to an embodiment of the present invention;

[0033] Figure 2 FIG. is an electronic control schematic diagram of the hot standby dual-loop control system for a brake according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To make the objectives, technical solutions, and beneficial effects of the present invention clearer and more understandable, the following further describes the present invention in detail with reference to specific embodiments and the accompanying drawings. Some but not all of the embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings later. In fact, various embodiments of the present invention can be implemented in many different forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention meet the applicable legal requirements.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In an embodiment of the present invention, a hot standby dual - loop control system for a brake and a hot standby dual - loop control method for a brake are provided. Please refer to Figure 1 , Figure 2 as shown.

[0037] A hot standby dual - loop control system for a brake includes an oil tank 1, two hydraulic oil circuits, a balance valve 17, a normally - closed brake 18, and a controller.

[0038] The hydraulic oil circuit includes a first hydraulic oil circuit, a second hydraulic oil circuit, and a third hydraulic oil circuit; on the first hydraulic oil circuit, a fuel pump 5 and a first check valve 10 are connected in series in sequence from the oil inlet end to the oil outlet end. The fuel pump 5 is specifically set as a gear pump to supply high - pressure hydraulic oil to the hydraulic oil circuit, and the fuel pump 5 is driven by an electric motor 4; on the second hydraulic oil circuit, a solenoid directional control valve 13 and an electronically controlled oil drain unit are connected in series in sequence from the oil inlet end to the oil outlet end. Among them, when the solenoid directional control valve 13 is in the first state position, the solenoid directional control valve 13 cuts off the second hydraulic oil circuit, and when the solenoid directional control valve 13 is in the second state position, the solenoid directional control valve 13 conducts the second hydraulic oil circuit. By cutting off or conducting the second hydraulic oil circuit through the solenoid directional control valve 13, the opening and closing of the normally - closed brake 18 are switched; the oil inlet end of the first hydraulic oil circuit and the oil outlet end of the second hydraulic oil circuit are connected to the oil tank 1, and the oil outlet end of the first hydraulic oil circuit and the oil inlet end of the second hydraulic oil circuit are connected to the third hydraulic oil circuit; an accumulator 14 and a pressure sensor 16 are connected to the third hydraulic oil circuit.

[0039] The balance valve 17 is provided with a V1 port, a V2 port, a C port, a first pilot oil port, and a second pilot oil port. The third hydraulic oil circuit in one hydraulic oil circuit is respectively connected to the V1 port and the first pilot oil port, and the third hydraulic oil circuit in the other hydraulic oil circuit is respectively connected to the V2 port and the second pilot oil port; when the oil pressure at the first pilot oil port is greater than the oil pressure at the second pilot oil port, the balance valve 17 is in the first state position, and the V1 port communicates with the C port; when the oil pressure at the first pilot oil port is less than the oil pressure at the second pilot oil port, the balance valve 17 is in the second state position, and the V2 port communicates with the C port.

[0040] The C port of the balance valve 17 is connected to the oil port of the normally - closed brake 18 through a fourth hydraulic oil circuit.

[0041] The normally - closed brake 18 is installed on one side of the drum of the belt conveyor for controllable braking of the belt conveyor. When the oil pressure value at its oil port is less than the threshold value, the normally - closed brake 18 closes for braking, and when the oil pressure value at its oil port is greater than the threshold value, the normally - closed brake 18 opens.

[0042] The controller is specifically set as a programmable logic controller (PLC). The controller is respectively connected to the pressure sensor 16, the electric motor 4, the solenoid directional control valve 13, and the electronically controlled oil drain unit through signal cables.

[0043] Among them, the controller detects the oil pressure of the third hydraulic oil circuit in the two hydraulic oil circuits in real time through the pressure sensor 16, compares the magnitudes of the oil pressures, determines the main working oil circuit, and determines the state of the hydraulic oil circuit currently serving as the main working oil circuit. Moreover, when the oil pressure detected by the pressure sensor 16 in the third hydraulic oil circuit reaches the set upper limit value, the controller triggers the motors 4 in each hydraulic oil circuit to shut down; when the oil pressure detected by the pressure sensor 16 in the third hydraulic oil circuit reaches the set lower limit value, the controller triggers the motors 4 in each hydraulic oil circuit to start.

[0044] The electronic control oil drain unit includes an electromagnetic proportional valve 12 and a throttle valve 11 arranged in parallel. The controller is connected to the electromagnetic proportional valve 12 via a signal cable. When the normally closed brake 18 needs to close for braking, the controller triggers the electromagnetic proportional valve 12 to act, controls the opening degree of the electromagnetic proportional valve 12 to change the oil drain speed of the hydraulic oil flowing through the electronic control oil drain unit, and further controls the closing speed of the normally closed brake 18 during braking and the length of the braking time of the normally closed brake 18.

[0045] The first one-way valve 10 is used to conduct unidirectionally from the oil inlet end to the oil outlet end of the first hydraulic oil circuit and cut off in the reverse direction. Moreover, the electromagnetic reversing valve 13 cuts off the second hydraulic oil circuit to achieve energy storage and pressure maintenance of the third hydraulic oil circuit and the accumulator 14.

[0046] A safety valve 9 is connected to the oil inlet end side of the first one-way valve 10 on the first hydraulic oil circuit. By setting the oil pressure value of the safety valve 9, the oil pressure value delivered by the oil pump 5 to the third hydraulic oil circuit through the first hydraulic oil circuit is controlled.

[0047] The hydraulic oil circuit further includes a fifth hydraulic oil circuit. A manual pump 6 is connected to the fifth hydraulic oil circuit. The oil inlet end of the fifth hydraulic oil circuit is connected to the oil tank 1, and the oil outlet end of the fifth hydraulic oil circuit is connected to the oil inlet end side of the first one-way valve 10 on the first hydraulic oil circuit. In this way, in case of a failure of the oil pump 5, the manual pump 6 can be used instead of the oil pump 5 for emergency use.

[0048] A second one-way valve 19 is connected to the oil outlet end side of the manual pump 6 on the fifth hydraulic oil circuit. The high-pressure hydraulic oil supplied by the manual pump 6 flows through the second one-way valve 19. The second one-way valve 19 is used to conduct unidirectionally from the oil inlet end to the oil outlet end of the fifth hydraulic oil circuit and cut off in the reverse direction.

[0049] A third one-way valve 8 is connected to the oil outlet end side of the oil pump 5 on the first hydraulic oil circuit. The high-pressure hydraulic oil supplied by the oil pump 5 flows through the third one-way valve 8. The third one-way valve 8 is used to conduct unidirectionally from the oil inlet end to the oil outlet end of the first hydraulic oil circuit and cut off in the reverse direction.

[0050] Pressure gauges 15 are connected to both the third hydraulic oil circuit and the fourth hydraulic oil circuit for the operator to check the oil pressures of the third hydraulic oil circuit and the fourth hydraulic oil circuit through the pressure gauges 15.

[0051] An oil filter is connected to the first hydraulic oil circuit. The oil filter specifically includes a mesh suction filter 3 and a high-pressure plate filter 7. The mesh suction filter 3 is arranged at the end of the oil inlet end of the first hydraulic oil circuit, and the high-pressure plate filter 7 is arranged on one side of the oil outlet end of the oil pump 5. The hydraulic oil entering the first hydraulic oil circuit is filtered by the mesh suction filter 3 and the high-pressure plate filter 7.

[0052] An air filter 2 is connected to the air inlet end of the fuel tank 1 to filter impurities in the air entering the fuel tank 1.

[0053] In an embodiment of the present invention, a hot standby dual-loop control method for a brake is further provided, which is applied to the above-mentioned hot standby dual-loop control system for a brake;

[0054] The method is as follows:

[0055] Step 1: Brake opening and dual-loop hot standby pressure maintaining operation

[0056] An opening signal is input to the controller, and the controller triggers the motors 4 of the two hydraulic oil circuits to start simultaneously, the oil pumps 5 operate simultaneously, the electromagnetic reversing valve 13 and the electric control oil drain unit are powered on. The controller triggers the electromagnetic reversing valve 13 to cut off the second hydraulic oil circuit, and the oil pump 5 continuously supplies high-pressure oil to the third hydraulic oil circuit, and the oil pressure in the third hydraulic oil circuit increases;

[0057] Keep the oil pressure in the third hydraulic oil circuit of one hydraulic oil circuit greater than the oil pressure in the third hydraulic oil circuit of the other hydraulic oil circuit, so that the third hydraulic oil circuit in one hydraulic oil circuit is connected to the normally closed brake 18 through the balance valve 17 and the fourth hydraulic oil circuit. As the oil pressure in the third hydraulic oil circuit increases, the normally closed brake 18 realizes the opening action, and the belt conveyor starts to operate, and the accumulator 14 stores energy synchronously;

[0058] When the pressure sensors 16 in the two hydraulic oil circuits detect that the oil pressure in the third hydraulic oil circuit reaches the set upper limit value, the controller triggers the motors 4 in each hydraulic oil circuit to close, and the accumulator 14 maintains pressure and stores energy to keep the oil pressure in the third hydraulic oil circuit for a period of time; when the pressure sensors 16 in the two hydraulic oil circuits detect that the oil pressure in the third hydraulic oil circuit reaches the set lower limit value, the controller triggers the motors 4 in each hydraulic oil circuit to start, and the accumulator 14 stores energy synchronously.

[0059] During the normal operation of the belt conveyor, when a fault occurs in one hydraulic oil circuit, the controller controls this hydraulic oil circuit to stop operating, and the electric control oil drain unit is triggered by the controller to drain oil. The oil pressure in the third hydraulic oil circuit of this hydraulic oil circuit decreases, and the oil pressure at the first pilot oil port is less than the oil pressure at the second pilot oil port, then enter step 2; otherwise, skip step 2 and enter step 3;

[0060] Step 2: Automatically switch the hydraulic oil circuit

[0061] The third hydraulic oil circuit in another hydraulic oil circuit is connected to the normally-closed brake 18 through the balance valve 17 and the fourth hydraulic oil circuit.

[0062] Step 3: Brake the brake

[0063] In Step 3, the following actions are performed on both hydraulic oil circuits:

[0064] Input a brake signal to the controller. The controller triggers the electromagnetic directional valve 13 to conduct the second hydraulic oil circuit, and the controller triggers the opening degree of the electric control oil drain unit to control the braking speed of the brake 18 until the normally-closed brake 18 realizes the braking action.

[0065] So far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the hot standby dual-loop control system for the brake of the present invention. The hot standby dual-loop control system and method for the brake of the present invention set two completely identical hydraulic oil circuits. Both hydraulic oil circuits are in an operating state. The hydraulic oil circuit with a larger oil pressure is used as the main working oil circuit and is connected to the normally-closed brake 18 through the balance valve 17, and the other hydraulic oil circuit is used as the secondary working oil circuit and is in a hot standby state; when the oil pressure of both hydraulic oil circuits reaches the set upper limit value, the motor 4 of the driving oil pump 5 is turned off, and the accumulator 14 is used for pressure maintaining and energy storage. When the oil pressure reaches the set lower limit value, the motor 4 of the driving oil pump 5 is started, and the motor 4 of the driving oil pump 5 works intermittently. The loss rate of the hydraulic valve parts, oil pump and motor is relatively low, and the system energy consumption is also reduced; when a failure occurs in one hydraulic oil circuit, the other hydraulic oil circuit in the hot standby state can be automatically connected to the normally-closed brake 18 through the balance valve 17 to realize seamless connection and switching of the two hydraulic oil circuits. At this time, the normally-closed brake 18 has not braked, and it is realized that the belt conveyor does not stop under the fault condition and does not affect the normal operation of the entire conveying and feeding system; in addition, the braking speed of the normally-closed brake 18 is controlled by the opening degree of the electric control oil drain unit, and the opening degree of the electric control oil drain unit is controlled by the controller according to the working conditions to realize intelligent braking, controllable braking, soft braking and emergency braking of the brake.

[0066] The above specific embodiments further elaborate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above is only the specific embodiments of the present invention and is not used to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot standby dual-loop control system for a brake, characterized in that: It includes a fuel tank, two hydraulic oil circuits, a balance valve, a normally closed brake, and a controller; The hydraulic oil circuit includes a first hydraulic oil circuit, a second hydraulic oil circuit, and a third hydraulic oil circuit. A fuel pump and a first one-way valve are connected in series in sequence from the oil inlet end to the oil outlet end on the first hydraulic oil circuit. The fuel pump is driven by an electric motor. An electromagnetic directional valve and an electric control oil drain unit are connected in series in sequence from the oil inlet end to the oil outlet end on the second hydraulic oil circuit. The electromagnetic directional valve is used to cut off or conduct the second hydraulic oil circuit. The oil inlet end of the first hydraulic oil circuit and the oil outlet end of the second hydraulic oil circuit are connected to the fuel tank. The oil outlet end of the first hydraulic oil circuit and the oil inlet end of the second hydraulic oil circuit are connected to the third hydraulic oil circuit. An accumulator and a pressure sensor are connected to the third hydraulic oil circuit; The balance valve is provided with a V1 port, a V2 port, a C port, a first pilot oil port, and a second pilot oil port. The third hydraulic oil circuit in one hydraulic oil circuit is respectively connected to the V1 port and the first pilot oil port, and the third hydraulic oil circuit in the other hydraulic oil circuit is respectively connected to the V2 port and the second pilot oil port; when the oil pressure at the first pilot oil port is greater than the oil pressure at the second pilot oil port, the balance valve is in the first state position, and the V1 port communicates with the C port; when the oil pressure at the first pilot oil port is less than the oil pressure at the second pilot oil port, the balance valve is in the second state position, and the V2 port communicates with the C port; The C port of the balance valve is connected to the oil port of the normally closed brake through a fourth hydraulic oil circuit; The controller is respectively connected to the pressure sensor, the electric motor, the electromagnetic directional valve, and the electric control oil drain unit through signal cables.

2. The dual-loop control system with hot standby for a brake according to claim 1, wherein: The electric control oil drain unit includes an electromagnetic proportional valve and a throttle valve arranged in parallel, and the controller is connected to the electromagnetic proportional valve through a signal cable.

3. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: A safety valve is connected to the first hydraulic oil circuit on the side of the oil inlet end of the first one-way valve.

4. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: The hydraulic oil circuit further includes a fifth hydraulic oil circuit. A manual pump is connected to the fifth hydraulic oil circuit. The oil inlet end of the fifth hydraulic oil circuit is connected to the fuel tank, and the oil outlet end of the fifth hydraulic oil circuit is connected to the first hydraulic oil circuit on the side of the oil inlet end of the first one-way valve.

5. A hot standby dual-loop control system for a brake according to claim 4, characterized in that: A second one-way valve is connected to the fifth hydraulic oil circuit on the side of the oil outlet end of the manual pump.

6. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: A third one-way valve is connected to the first hydraulic oil circuit on the side of the oil outlet end of the fuel pump.

7. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: Pressure gauges are connected to both the third hydraulic oil circuit and the fourth hydraulic oil circuit.

8. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: An oil filter is connected to the first hydraulic oil circuit.

9. A hot standby dual-loop control system for a brake according to claim 1, characterized in that: An air filter is connected to the air inlet end of the fuel tank.

10. A hot standby dual-loop control method for a brake, characterized in that, Apply the hot standby dual-loop control system for the brake according to any one of claims 1 to 9; The method is as follows: Step 1: Brake opening and dual-loop hot standby pressure maintenance operation Input a brake opening signal to the controller. The controller triggers the electric motors of the two hydraulic oil circuits to start simultaneously. The electromagnetic directional valve and the electric control oil drain unit are powered on. The controller triggers the electromagnetic directional valve to cut off the second hydraulic oil circuit, and the oil pressure of the third hydraulic oil circuit increases; Keep the oil pressure of the third hydraulic oil circuit in one hydraulic oil circuit greater than the oil pressure of the third hydraulic oil circuit in the other hydraulic oil circuit, so that the third hydraulic oil circuit in one hydraulic oil circuit is connected to the normally closed brake through the balance valve and the fourth hydraulic oil circuit. As the oil pressure in the third hydraulic oil circuit increases, the normally closed brake realizes the brake opening action; When the pressure sensors in the two hydraulic oil circuits detect that the oil pressure in the third hydraulic oil circuit reaches the set upper limit value, the controller triggers the motors in each hydraulic oil circuit to shut down, and the accumulator is used for pressure holding and energy storage; when the pressure sensors in the two hydraulic oil circuits detect that the oil pressure in the third hydraulic oil circuit reaches the set lower limit value, the controller triggers the motors in each hydraulic oil circuit to start; When a failure occurs in one hydraulic oil circuit, go to Step 2; otherwise, skip Step 2 and go to Step 3; Step 2: Automatically switch the hydraulic oil circuit The third hydraulic oil circuit in the other hydraulic oil circuit is connected to the normally closed brake through a balance valve and the fourth hydraulic oil circuit; Step 3: The brake closes and brakes Input a brake closing signal to the controller. The controller triggers the electromagnetic directional valve to make the second hydraulic oil circuit conductive, and the controller controls the opening degree of the electro-hydraulic oil drain unit to control the speed of the brake closing and braking until the normally closed brake realizes the brake closing and braking action.

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