CN-121989889-A - Underground transportation equipment braking control system, control method and underground transportation equipment

CN121989889ACN 121989889 ACN121989889 ACN 121989889ACN-121989889-A

Abstract

The invention relates to the field of engineering machinery, in particular to a brake control system and a brake control method for underground transportation equipment and the underground transportation equipment. The underground transportation equipment braking control system has a multi-structure redundant braking function, the accumulator is kept at pressure through the charging valve, when the pressure of the accumulator reaches a set value, the charging valve is used for transposition and supplying oil to the steering gear, in addition, return oil of the steering gear can return to an oil tank after the rodless cavities of the front brake and the rear brake are flushed through the one-way valve group, so that the coordination work of a braking loop, a steering loop and a flushing loop is realized through the same hydraulic pump, the underground transportation equipment is adapted, and the braking reliability can be ensured while the coordination of the steering function is realized.

Inventors

Shi Ruizhuo
TAN HAI
ZHANG BOHONG
GUO LIANFENG
LI FAN
ZHAO JIANDONG
LI MING
ZHAO XINGYIN
FENG YANQIU
WU JIAO
WANG PENG
LI YAOGUANG

Assignees

徐州徐工能源装备有限公司

Dates

Publication Date: 20260508
Application Date: 20260325

Claims (10)

1. A brake control system for an underground transportation device, comprising: A hydraulic pump (2), The port P of the liquid filling valve (3) is connected with the oil outlet of the hydraulic pump (2), the port O is connected with the port P of the steering gear (8), and the port T is connected with the oil tank; The accumulator (4) is connected with an A port of the charging valve (3), and the charging valve (3) is used for keeping the set pressure of the accumulator (4); An emergency brake valve (5), wherein the port P is connected with the port A of the liquid filling valve (3) and is connected with the energy accumulator (4) in parallel, the port T is connected with an oil tank, and the port A is connected with the port P1 of the parking electromagnetic valve (7) through a pedal valve (6) controlled by a brake pedal; The brake comprises a front brake (10) and a rear brake (11), wherein a P2 port and a P3 port of the parking electromagnetic valve (7) are respectively connected with rod cavities of the rear brake (11) and the front brake (10), and brake springs are arranged in rodless cavities of the rear brake (11) and the front brake (10); When the emergency brake valve (5) is powered on, the brake pedal is not stepped on, and the parking electromagnetic valve (7) is powered on, the energy accumulator (4) establishes hydraulic pressure in rod cavities of the front brake (10) and the rear brake (11) through the emergency brake valve (5), the pedal valve (6) and the parking electromagnetic valve (7), the brake spring is compressed, and the front brake (10) and the rear brake (11) are in a brake release state; When the emergency brake valve (5) is powered off, a brake pedal is stepped on or a parking electromagnetic valve (7) is powered off, a rod cavity of the rear brake (11) and a rod cavity of the front brake (10) are communicated with an oil tank to release pressure, a brake spring stretches, and the rear brake (11) and the front brake (10) are in a braking state.
2. The underground transportation facility brake control system of claim 1, further comprising: the oil inlet of the overflow valve (1) is connected with the oil outlet of the hydraulic pump (2), and the oil outlet is connected with the oil tank.
3. The underground transportation equipment brake control system of claim 1, wherein the charge valve (3) comprises: The first reversing valve (31), the first lower oil port is connected with the P port of the filling valve (3), the second lower oil port is connected with the O port of the filling valve (3), and the first upper oil port is connected with the A port of the filling valve (3) through the filter (32), the damping hole (33) and the one-way valve (34); The left control end of the second reversing valve (35) is connected with the oil outlet of the one-way valve I (34), the right control end of the second reversing valve (35) is provided with a reset spring II (38); When the second reversing valve (35) is at the left position, the lower oil port of the second reversing valve (35) is cut off, and the upper oil port I is communicated with the upper oil port II; The left control end of the first reversing valve (31) is connected with a first reset spring (37), and the right control end of the first reversing valve is connected with a P port of the liquid filling valve (3); When the first reversing valve (31) is at the left position, a lower oil port I of the first reversing valve (31) is communicated with an upper oil port, the lower oil port I is communicated with a lower oil port II through a damping hole II (36), and when the first reversing valve (31) is at the right position, the lower oil port I of the first reversing valve (31) is communicated with the upper oil port and the lower oil port II in parallel.
4. Underground transportation equipment brake control system according to claim 1, characterized in that the pedal valve (6) comprises: The pedal reversing valve (61) is characterized in that a left oil port I is connected with a P port of the pedal valve (6), a left oil port II is connected with an oil tank through a T port of the pedal valve (6), and a right oil port is connected with an A port of the pedal valve (6).
5. The underground transportation equipment brake control system of claim 4, wherein the pedal reversing valve (61) includes a build-up position, a shut-off position, and a pressure release position; when the brake pedal is not stepped, the pedal reversing valve (61) is in a pressure building position, a left oil port I and a right oil port II of the pedal reversing valve (61) are communicated, and a left oil port II is blocked; When the pedal reversing valve (61) is in a stop position, a left oil port I, a left oil port II and a right oil port of the pedal reversing valve (61) are all stopped; when a brake pedal is stepped down, the pedal reversing valve (61) is in a pressure relief position, a left oil port I of the pedal reversing valve (61) is blocked, and a left oil port II is communicated with a right oil port.
6. The underground transportation equipment brake control system according to claim 1, wherein the parking solenoid valve (7) includes a left solenoid valve (71) and a right solenoid valve (72); the oil inlet of the left electromagnetic valve (71) is connected between the P1 port and the P2 port of the parking electromagnetic valve (7), and the oil outlet is connected with the oil tank through the T1 port of the parking electromagnetic valve (7), when the left electromagnetic valve (71) is powered on, the oil inlet is cut off, and when the left electromagnetic valve is powered off, the oil inlet is communicated with the oil outlet; an oil inlet of the right electromagnetic valve (72) is connected between a P1 port and a P3 port of the parking electromagnetic valve (7), an oil outlet is connected with an oil tank through a T2 port of the parking electromagnetic valve (7), the oil inlet is cut off when the right electromagnetic valve (72) is powered on, and the oil inlet is communicated with the oil outlet when the power is lost.
7. Underground transportation equipment brake control system according to claim 1, characterized in that the diverter (8) comprises: The steering valve (81), the first lower oil port is connected with the P port of the steering gear (8), the second lower oil port is connected with the T port of the steering gear (8), the first upper oil port is connected with the A port and the B port of the steering gear (8), and the A port and the B port of the steering gear (8) are respectively connected with a rod cavity and a rodless cavity of the steering cylinder (12); The steering valve (81) is connected with a steering wheel through a steering column, and the valve core position of the steering valve can be controlled by rotating the steering wheel; when the steering valve (81) is positioned at the left position, a lower oil port I and an upper oil port I of the steering valve (81) are communicated, a lower oil port II and an upper oil port II are communicated, an A port of the steering gear (8) is used for supplying oil to a rod cavity of the steering oil cylinder (12), and a rodless cavity of the steering oil cylinder (12) returns oil through a B port of the steering gear (8); when the steering valve (81) is in the middle position, a lower oil port I and a lower oil port II of the steering valve (81) are communicated, an upper oil port I and an upper oil port II are both blocked, and a rod cavity and a rodless cavity of the steering oil cylinder (12) are not filled with oil; When the steering valve (81) is positioned at the right position, a lower oil port I and an upper oil port II of the steering valve (81) are communicated, the lower oil port II and the upper oil port I are communicated, a port B of the steering gear (8) is used for supplying oil to a rodless cavity of the steering oil cylinder (12), and a rod cavity of the steering oil cylinder (12) returns oil through a port A of the steering gear (8).
8. The underground transportation facility brake control system of claim 7, further comprising: The one-way valve group (9) is characterized in that an A port is connected with a T port of the steering gear (8), a B port and a C port are respectively connected with rodless cavities of the front brake (10) and the rear brake (11), a D port is connected with an oil tank, and the A port, the B port and the C port of the one-way valve group (9) are connected in parallel and then connected with the D port through a two-way valve (91).
9. A control method of an underground transportation equipment brake control system, characterized by being based on the underground transportation equipment brake control system according to any one of claims 1 to 8, comprising: in the traveling process of underground transportation equipment, a hydraulic pump (2) keeps pressure of an accumulator (4) through a charging valve (3), after the accumulator (4) reaches a set pressure, the hydraulic pump (2) supplies oil to a steering gear (8) through the charging valve (3), the accumulator (4) establishes hydraulic pressure in rod cavities of a front brake (10) and a rear brake (11) through an emergency brake valve (5), a pedal valve (6) and a parking electromagnetic valve (7), braking springs of rodless cavities of the front brake (10) and the rear brake (11) are compressed, and the rear brake (11) and the front brake (10) keep a braking release state; When conventional braking is needed, hydraulic oil with rod cavities of a front brake (10) and a rear brake (11) is pressed down by a brake pedal, the hydraulic oil is decompressed through a parking electromagnetic valve (7) and a pedal valve (6), braking springs of rod-free cavities of the front brake (10) and the rear brake (11) are stretched, and the rear brake (11) and the front brake (10) are braked; In the traveling process of underground transportation equipment, when a brake pedal fails or a brake pedal and a parking electromagnetic valve (7) fail, an emergency brake valve (5) is powered off, hydraulic oil with rod cavities of a front brake (10) and a rear brake (11) is decompressed through the parking electromagnetic valve (7), a pedal valve (6) and the emergency brake valve (5), brake springs of rod-free cavities of the front brake (10) and the rear brake (11) are stretched, and the rear brake (11) and the front brake (10) are braked; In the traveling process of underground transportation equipment, when a brake pedal fails or a brake pedal and an emergency brake valve (5) fail, a parking electromagnetic valve (7) is powered off, hydraulic oil with rod cavities of a front brake (10) and a rear brake (11) is decompressed through the parking electromagnetic valve (7), brake springs of the front brake (10) and the rear brake (11) are stretched, and the rear brake (11) and the front brake (10) are braked.
10. An underground transportation apparatus comprising the underground transportation apparatus brake control system of any one of claims 1-8.

Description

Underground transportation equipment braking control system, control method and underground transportation equipment Technical Field The invention relates to the field of engineering machinery, in particular to a brake control system and a brake control method for underground transportation equipment and the underground transportation equipment. Background The underground transportation equipment is widely applied equipment in tunnels and underground engineering, and has complex use conditions and severe environment during underground construction. The braking system is a key system for judging whether the underground transportation equipment can continuously work or not, and the reliability and the braking effect of the braking system directly determine the performance of the underground transportation equipment. In order to improve the working efficiency and the service life of underground transportation equipment, a braking system which is adaptive to the underground transportation equipment and can ensure the braking reliability is needed in the prior art. Disclosure of Invention The invention aims to provide a brake control system and a brake control method for underground transportation equipment and the underground transportation equipment, wherein the accumulator is kept under pressure through a liquid filling valve, and meanwhile, the pressure of the accumulator is kept, the redundant flow output by a hydraulic pump can supply oil to a steering gear through the liquid filling valve, so that the brake control system is suitable for braking and steering requirements when the underground transportation equipment walks. In the traveling process of the underground transportation equipment, the energy accumulator builds hydraulic pressure in rodless cavities of the front brake and the rear brake through the pedal valve and the parking electromagnetic valve, and the front brake and the rear brake are in a brake release state. According to the invention, a brake redundancy control strategy is realized through the emergency brake valve and the parking electromagnetic valve, and the hydraulic and electric control effectively improves the braking safety and reliability of underground transportation equipment in the running process. In a first aspect, the present invention provides an underground transportation device brake control system comprising: A hydraulic pump, which is connected to the hydraulic pump, The port P is connected with an oil outlet of the hydraulic pump, the port O is connected with the port P of the steering gear, and the port T is connected with the oil tank; The accumulator is connected with the port A of the charging valve, and the charging valve is used for keeping the set pressure of the accumulator; The port P of the emergency brake valve is connected with the port A of the liquid filling valve and is connected with the energy accumulator in parallel, the port T of the emergency brake valve is connected with the oil tank, and the port A of the emergency brake valve is connected with the port P1 of the parking electromagnetic valve through a pedal valve controlled by a brake pedal; the brake comprises a front brake and a rear brake, a P2 port and a P3 port of the parking electromagnetic valve are respectively connected with rod cavities of the rear brake and the front brake, and brake springs are arranged in rodless cavities of the rear brake and the front brake; When the emergency brake valve is powered on, the brake pedal is not stepped on, and the parking electromagnetic valve is powered on, the energy accumulator passes through the emergency brake valve, the pedal valve and the parking electromagnetic valve, hydraulic pressure is built in rod cavities of the front brake and the rear brake, the brake spring is compressed, and the front brake and the rear brake are in a brake release state; when the emergency brake valve is powered off, a brake pedal is stepped on or a parking electromagnetic valve is powered off, rod cavities of the rear brake and the front brake are communicated with an oil tank to release pressure, a brake spring stretches, and the rear brake and the front brake are in a braking state. Optionally, the method further comprises: An overflow valve, an oil inlet is connected with an oil outlet of the hydraulic pump, the oil outlet is connected with the oil tank. Optionally, the charging valve comprises: The first reversing valve is characterized in that a lower oil port is connected with a P port of the filling valve, a lower oil port II is connected with an O port of the filling valve, and an upper oil port is connected with an A port of the filling valve through a filter, a damping hole I and a one-way valve; The left control end of the second reversing valve is connected with the oil outlet of the first one-way valve, and the right control end of the second reversing valve is provided with a reset spring II; when the second reversing valve is in the left position,