Inclined shaft common rail car rope breaking protection system and method

Abstract

The application provides a rope breaking protection system and method for an inclined shaft general rail man-car, wherein the system is provided with two electromagnetic valves, one of which is opened by a speed signal of a speed sensor, and the other is opened by a track slope signal obtained by an inclination sensor; when the speed exceeds a set speed value and the slope exceeds a set slope value, the brake is only depressurized and braked, and a passive braking mode of a wheel driving oil pump is adopted, so that the oil pump can also supply oil to the control oil port of the hydraulic control one-way valve when the wheel rotates, thereby improving the reliability of the brake. The rope breaking protection method for the inclined shaft general rail man-car is performed by using the above rope breaking protection system, so that the protection can be triggered when the locomotive breaks the rope, and the safety of the locomotive operation is improved.

Description

Technical Field

[0001] This invention belongs to the field of endless rope continuous traction vehicle control technology, specifically relating to a rope breakage protection system and method for personnel cars on inclined shafts. Background Technology

[0002] Endless rope continuous traction vehicles are a type of ordinary rail transport equipment used in underground coal mine roadways, pulled by steel wire ropes. They are suitable for direct transport of materials and equipment without transshipment in long-distance, steep-angle, variable-slope, and high-tonnage working conditions, including face roadways, mining areas, and centralized rail roadways. When transporting personnel in inclined shafts with a gradient greater than 10 degrees, the common method is to use a hoist to pull the personnel car along the inclined shaft's ground rails; this is known as inclined shaft ordinary rail personnel car.

[0003] The most significant problem with conventional rail transport vehicles traveling on inclined shafts is the slippage caused by rope breakage, which can lead to unpredictable consequences. Existing technologies employ mechanical structures to protect the locomotive from rope breakage. For example, CN11517994B discloses a gravity unlocking device in a conventional rail transport device with endless rope, which controls the locomotive's braking when the locomotive slips due to rope breakage on a set gradient.

[0004] However, the above-mentioned rope breakage protection structure is relatively complex and prone to failure, and may not respond in a timely manner when it is blocked. Summary of the Invention

[0005] The purpose of this invention is to provide a rope breakage protection system and method for personnel cars in inclined shafts, which combines speed detection and gradient detection to ensure timely braking when a rope breaks while the locomotive is running in a roadway with a high gradient.

[0006] This invention provides a rope breakage protection system for personnel carriers on inclined shafts, comprising:

[0007] wheel;

[0008] An oil pump is connected to a wheel and rotates synchronously with the wheel.

[0009] A speed sensor, connected to the wheels, is used to acquire the locomotive's speed signal;

[0010] Inclination sensor, which is installed on the locomotive, is used to acquire the gradient signal of the locomotive's running track;

[0011] A braking control device connected to the brake, wherein the braking control device controls the brake to perform corresponding control actions based on the signals from the speed sensor and the tilt sensor;

[0012] A throttling device, which is connected to the oil pump via an oil pipe, is used to control the amount of oil supplied by the oil pump to the brake control device;

[0013] A one-way valve is provided between the throttling device and the braking control device to prevent hydraulic oil from the braking control device from flowing to the throttling device.

[0014] In one possible embodiment, the braking control device includes a first solenoid valve, a second solenoid valve, and a hydraulically controlled check valve; the first solenoid valve and the second solenoid valve are connected in parallel, and the hydraulically controlled check valve and the second solenoid valve are connected in series; the P port of the second solenoid valve is connected to the control port of the hydraulically controlled check valve, the B port of the hydraulically controlled check valve is connected to the P port of the first solenoid valve, and the A port of the hydraulically controlled check valve is connected to the oil tank; the wheel is also connected to the speed sensor, which is used to acquire the speed signal of the wheel and convert it into a first control command by the controller, and the first solenoid valve receives the first control command and executes the corresponding control action; the tilt sensor is used to acquire the gradient signal of the locomotive running track and convert it into a second control command by the controller, and the second solenoid valve receives the second control command and executes the corresponding control action.

[0015] In one possible embodiment, the oil pump is a bidirectional oil pump. The oil pump's inlet and outlet are connected to ports A and B of the hydraulic bridge via oil pipes. The hydraulic bridge's inlet P2 is connected to the oil tank via an oil pipe. The hydraulic bridge's outlet P1 is connected to a throttling device after passing through a filter. The bidirectional oil pump is equipped with a return port, which is connected to the oil tank via a pipeline.

[0016] In one possible embodiment, the throttling device is installed on the main pipeline. The throttling device includes an overflow valve and a throttling valve. The oil outlet P1 of the hydraulic bridge is connected to the P port of the overflow valve and the oil inlet of the throttling valve after passing through a filter. The T port of the overflow valve is connected to the A port of the solenoid valve and the control oil port of the hydraulic control check valve after passing through a check valve. The oil return port of the overflow valve and the oil outlet of the throttling valve are connected to the oil tank.

[0017] In one possible embodiment, the braking control device further includes a shut-off valve, which is connected in parallel with the first solenoid valve. One end of the shut-off valve is connected to the oil inlet of the brake, and the other end is connected to the oil tank.

[0018] In one possible embodiment, the speed sensor is an encoder or a Hall sensor.

[0019] A method for protecting personnel carriers on inclined shafts from rope breakage includes:

[0020] The speed of the wheels is obtained by a speed sensor, and the gradient of the track on which the locomotive runs is obtained by a tilt sensor;

[0021] When the speed sensor detects a speed greater than or equal to a set speed value, the controller sends a control command to the first solenoid valve, which is then energized and turned on. If the tilt sensor detects a roadway slope greater than or equal to a set slope value, the controller sends a control command to the second solenoid valve, which is then energized and turns on, controlling the hydraulic check valve to open, and the brake to release pressure and apply pressure. If the tilt sensor detects a roadway slope less than a set slope value, the controller does not send a control command to the second solenoid valve, which does not turn on, and the brake does not apply pressure.

[0022] By controlling the throttling device, the hydraulic oil pressure supplied by the oil pump to the braking control device is lower than the opening pressure of the hydraulic check valve when the system reaches a set speed value. When the speed sensor detects a speed lower than the set speed value, the controller does not send a control command to the first solenoid valve, and the first solenoid valve does not conduct. At this time, when the roadway slope detected by the tilt sensor is greater than or equal to or less than the set slope value, the hydraulic check valve does not open.

[0023] In one possible embodiment, the slope is set to 10°.

[0024] The rope breakage protection system and method for personnel carriers on inclined shafts provided by this invention uses two solenoid valves. One solenoid valve is opened by a speed signal from a speed sensor, and the other solenoid valve is opened by a track gradient signal obtained from an inclination sensor. The brake is only depressurized when the speed and gradient exceed the set speed and gradient values. In addition, a passive braking method using a wheel-driven oil pump is adopted. When the wheel rotates, the oil pump can also supply oil to the control port of the hydraulic check valve, which improves the reliability of braking. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a control system diagram provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of the present invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] refer to Figure 1 This embodiment provides a rope breakage protection system for a conventional track personnel vehicle in an inclined shaft, including wheels, speed sensors, oil pump 1, braking control device, tilt sensor, hydraulic check valve 6, and brake 10.

[0030] The speed sensor is connected to the wheels of the endless rope continuous traction vehicle. Optionally, the speed sensor can be an encoder or a Hall sensor. The wheels and the speed sensor are connected by gear transmission.

[0031] An oil pump 1 is also installed on the wheel, and the input shaft of the oil pump 1 is connected to the wheel axle. The rotation of the wheel drives the oil pump to operate, thereby achieving oil supply, which is to achieve passive braking. The oil pump 1 can be a bidirectional oil pump. The oil inlet and outlet of the oil pump 1 are connected to the A and B ports of the hydraulic bridge 2 through oil pipes. The oil inlet P2 of the hydraulic bridge 2 is connected to the oil tank through an oil pipe. The oil outlet P1 of the hydraulic bridge 2 is connected to the throttling device 4 after passing through the filter 3. The bidirectional oil pump is equipped with a return oil port, which is connected to the oil tank through a pipeline.

[0032] The P2 port of hydraulic bridge 2 is connected to the main pipeline of the hydraulic system, on which a throttling device 4 and a check valve 5 are installed. The throttling device 4 includes an overflow valve 41 and a throttle valve 42. The oil outlet P1 of hydraulic bridge 2, after passing through filter 3, is connected to the P port of overflow valve 41 and the inlet port of throttle valve 42. The T port of overflow valve 41, after passing through check valve 5, is connected to the A port of solenoid control valve 7 and the control port K of hydraulic check valve 6. The return port of overflow valve 41 and the outlet port of throttle valve 42 are connected to the oil tank. The B port of hydraulic check valve 6 is connected to the P port of the first solenoid control valve. The B port of hydraulic check valve 6 is also connected to brake 10, and the A port of hydraulic check valve 6 is connected to the oil tank. This throttling device 4 is used to control the amount of oil supplied by oil pump 1 to the brake control device.

[0033] In one possible embodiment, the braking control device includes a first solenoid valve 7, a second solenoid valve 9, and a hydraulically controlled check valve 6; the first solenoid valve 7 and the second solenoid valve 9 are connected in parallel, and the hydraulically controlled check valve 6 and the second solenoid valve 9 are connected in series; the P port of the second solenoid valve 9 is connected to the control port of the hydraulically controlled check valve 6, the B port of the hydraulically controlled check valve 6 is connected to the P port of the first solenoid valve 7, and the A port of the hydraulically controlled check valve 6 is connected to the oil tank; the wheel is also connected to a speed sensor, which is used to acquire the speed signal of the wheel and convert it into a first control command by the controller, and the first solenoid valve 7 receives the first control command and executes the corresponding control action; the tilt sensor is used to acquire the gradient signal of the locomotive running track and convert it into a second control command by the controller, and the second solenoid valve 9 receives the second control command and executes the corresponding control action.

[0034] In one possible implementation, the brake control device also includes a shut-off valve 8, which functions as an emergency pressure relief valve. One end of the shut-off valve 8 is connected to the brake's oil inlet, and the other end is connected to the oil tank. The shut-off valve 8 is connected to the first solenoid control valve 7. The brake 10's oil inlet is connected to the oil tank via the shut-off valve 8.

[0035] The pressure relief oil of the brake 10 flows to port A of the second control valve 9 after being opened by the first solenoid control valve 7. If the second control valve 9 is opened, the pressure relief oil acts as control oil to open the hydraulic check valve 6. After opening, the hydraulic oil of the brake 10 is directly connected to the oil tank, thereby achieving rapid pressure relief braking.

[0036] In this embodiment, the first electromagnetic control valve 7 receives control commands from the controller, the speed sensor is used to acquire the speed signal of the wheel and convert it into a first control command by the controller, the first electromagnetic control valve 7 receives the first control command and executes the corresponding control action; the tilt sensor is used to acquire the slope signal of the locomotive running roadway and convert it into a second control command by the controller, the second electromagnetic control valve 9 receives the second control command and executes the corresponding control action.

[0037] In another embodiment, a method for protecting an endless rope continuous traction vehicle from rope breakage is also provided, comprising:

[0038] The speed of the wheels is obtained by a speed sensor, and the gradient of the track on which the locomotive runs is obtained by a tilt sensor;

[0039] When the speed sensor detects a speed greater than or equal to a set speed value, the controller sends a control command to the first solenoid valve, which is then energized and turned on. If the tilt sensor detects a roadway slope greater than or equal to a set slope value, the controller sends a control command to the second solenoid valve, which is then energized and turns on, controlling the hydraulic check valve to open, and the brake to release pressure and apply pressure. If the tilt sensor detects a roadway slope less than a set slope value, the controller does not send a control command to the second solenoid valve, which does not turn on, and the brake does not apply pressure.

[0040] By controlling the throttling device, the hydraulic oil pressure supplied by the oil pump to the braking control device at the set speed value is lower than the opening pressure of the hydraulic check valve; when the speed sensor obtains a speed less than the set speed value, the controller does not send a control command to the first solenoid valve, and the first solenoid valve does not conduct; when the roadway slope obtained by the tilt sensor is greater than or equal to or less than the set slope value, the hydraulic check valve does not open.

[0041] The throttling device here can control the amount of oil supplied by the oil pump. The higher the locomotive's running speed, the more oil the oil pump supplies. The throttling device controls the amount of oil supplied to the control port of the hydraulic check valve 6, thereby controlling whether the hydraulic check valve is open.

[0042] When the locomotive's operating speed is greater than or equal to the set speed value, if the acquired gradient value exceeds the set gradient value, the brake's pressure relief oil and the oil pump's supply oil simultaneously act on the control port of the hydraulic check valve 6, thereby ensuring the opening of the hydraulic check valve 6. When the locomotive's operating speed is less than the set speed value, even if the gradient value acquired by the tilt sensor exceeds the set gradient value, due to the throttling device, the hydraulic oil flowing into the control port of the hydraulic check valve 6 cannot open it, thus preventing the brake from engaging.

[0043] In some possible embodiments, the slope value is set to 10°.

[0044] In other words, if a rope breaks and the locomotive slips while climbing a slope, it will inevitably lead to overspeed. When the system detects overspeed, if it is on a slope of more than 10 degrees, it must apply the brakes to ensure the safe operation of the locomotive.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or modifications can be made to some or all of the technical solutions, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rope breakage protection system for personnel cars on inclined shafts, characterized in that, include: wheel; An oil pump is connected to a wheel and rotates synchronously with the wheel. A speed sensor, connected to the wheels, is used to acquire the locomotive's speed signal; Inclination sensor, which is installed on the locomotive, is used to acquire the gradient signal of the locomotive's running track; A braking control device connected to the brake, wherein the braking control device controls the brake to perform corresponding control actions based on the signals from the speed sensor and the tilt sensor; A throttling device, which is connected to the oil pump via an oil pipe, is used to control the amount of oil supplied by the oil pump to the brake control device; A one-way valve is provided between the throttling device and the braking control device to prevent hydraulic oil from the braking control device from flowing to the throttling device; The braking control device includes a first solenoid valve, a second solenoid valve, and a hydraulically controlled check valve. The first solenoid valve and the second solenoid valve are connected in parallel, and the hydraulically controlled check valve is connected in series with the second solenoid valve. The P port of the second solenoid valve is connected to the control port of the hydraulically controlled check valve, the B port of the hydraulically controlled check valve is connected to the P port of the first solenoid valve, and the A port of the hydraulically controlled check valve is connected to the oil tank. The wheel is also connected to the speed sensor, which is used to acquire the speed signal of the wheel and convert it into a first control command via the controller. The first solenoid valve receives the first control command and executes the corresponding control action. The tilt sensor is used to acquire the gradient signal of the locomotive running track and convert it into a second control command via the controller. The second solenoid valve receives the second control command and executes the corresponding control action.

2. The inclined shaft conventional track personnel car rope breakage protection system according to claim 1, characterized in that, The oil pump is a bidirectional oil pump. The inlet and outlet of the bidirectional oil pump are connected to the A and B ports of the hydraulic bridge through oil pipes. The inlet P2 of the hydraulic bridge is connected to the oil tank through an oil pipe. The outlet P1 of the hydraulic bridge is connected to the throttling device after passing through a filter. The bidirectional oil pump is equipped with a return port, which is connected to the oil tank through a pipeline.

3. The inclined shaft conventional track personnel car rope breakage protection system according to claim 2, characterized in that, The throttling device is installed on the main pipeline. The throttling device includes an overflow valve and a throttling valve. The oil outlet P1 of the hydraulic bridge is connected to the P port of the overflow valve and the oil inlet of the throttling valve after passing through a filter. The T port of the overflow valve is connected to the A port of the solenoid valve and the control oil port of the hydraulic control check valve after passing through a check valve. The oil return port of the overflow valve and the oil outlet of the throttling valve are connected to the oil tank.

4. The inclined shaft conventional track personnel car rope breakage protection system according to claim 2, characterized in that, The braking control device also includes a shut-off valve, which is connected in parallel with the first solenoid valve. One end of the shut-off valve is connected to the oil inlet of the brake, and the other end is connected to the oil tank.

5. The inclined shaft conventional track personnel car rope breakage protection system according to claim 1, characterized in that, The speed sensor is either an encoder or a Hall sensor.

6. The method for protecting personnel and vehicles from rope breakage in inclined shafts according to claim 1, characterized in that, include: The speed of the wheels is obtained by a speed sensor, and the gradient of the track on which the locomotive runs is obtained by a tilt sensor; When the speed sensor detects a speed greater than or equal to a set speed value, the controller sends a control command to the first solenoid valve, which is then energized and turned on. If the tilt sensor detects a roadway slope greater than or equal to a set slope value, the controller sends a control command to the second solenoid valve, which is then energized and turns on, controlling the hydraulic check valve to open, and the brake to release pressure and apply the brakes. If the tilt sensor detects a roadway slope less than a set slope value, the controller does not send a control command to the second solenoid valve, which is not turned on, and the brake does not apply the brakes. By controlling the throttling device, the hydraulic oil pressure supplied by the oil pump to the braking control device is lower than the opening pressure of the hydraulic control check valve when the system reaches a set speed value. When the speed sensor detects a speed lower than the set speed value, the controller does not send a control command to the first solenoid valve, and the first solenoid valve does not conduct. At this time, when the roadway slope detected by the tilt sensor is greater than or equal to or less than the set slope value, the hydraulic control check valve does not open.

7. The method for protecting personnel and vehicles on inclined shafts from rope breakage according to claim 6, characterized in that, The slope is set to 10°.

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