Hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method

Abstract

A hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method thereof, relating to a hydraulic pump station detection system and method thereof, the system including a power supply, a motor M for controlling the hydraulic pump station oil cylinder action, a motor forward control contact, a motor reverse control contact, a braking AC contactor circuit, a relief AC contactor circuit, an automatic cycle control circuit, and a relay delay control circuit. The method includes steps S1: connecting the circuit, S2: setting the detection circuit cycle working time, S3: starting, S4: motor forward rotation, S5: time relay 1J slowly absorbing, stepless relay 2J slowly releasing, S6: motor stopping, S7: motor reverse rotation, S8: oil cylinder pressure maintenance, and S9: judging whether the detection is complete. The present invention can realize automatic / manual cycle fault detection of the oil cylinder action circuit, and has the characteristics of high maintenance efficiency, high safety performance, low rework rate, flexible use, reduced work intensity, good application effect, wide application range, and easy to promote and use.

Description

Technical Field

[0001] The present invention relates to a hydraulic pump station detection system and method thereof, in particular to a hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method thereof. Background Art

[0002] The WKT-1 controllable parking brake is a device for preventing slipping at the tail end of a railway hump marshaling yard. It utilizes spring force to brake, decelerate, and stop a slipping train set via a brake rail. It features fault-guided safety features, ensuring safe transport operations. During operation, the device accurately signals braking and release, meeting the requirements for station signal interlocking and centralized signal control. It is an ideal anti-slip device for parking at the tail end of a hump marshaling yard, replacing traditional iron-shoe parking brakes to prevent damage to wheel treads and rail surfaces. When the brake needs to be released, the hydraulic pump station operates to fill the release cylinder with oil, compressing the brake spring and retracting the brake rail, allowing the train to pass freely. The brake can be controlled automatically from a remote location or operated from a close distance, enabling automated train marshaling, reducing staff and increasing efficiency, and effectively ensuring safe operations at the tail end of the marshaling yard.

[0003] The main structure of a parking device consists of two major components: the mechanical system and the hydraulic pump station system. The cylinder of the parking device hydraulic pump station system is the core component of the entire power system and directly affects the operating status of the parking device. Due to its frequent operation, the cylinder is a high-failure component of the entire power system. According to statistics from a maintenance area on parking device equipment failures under its jurisdiction, 34 failures were caused by the hydraulic pump station system, accounting for 75% of the total. During operation, oil leakage from the hydraulic system, including the cylinder, relief valve, and oil pipes, is a major cause of parking device failure. Therefore, the inspection and maintenance of the hydraulic pump station system cylinder is a key task for parking device equipment. Due to the large number of parking devices, their complex structure, and their installation location next to outdoor lines, maintenance is essentially a problem-solving approach. Currently, railway companies have been using a manual maintenance method for parking device hydraulic pump stations in hump marshaling yards, relying on years of experience and intuition. This method has many shortcomings: first, the maintenance process is complex, the connection equipment is cumbersome, and maintenance efficiency is low; second, the testing process has a low safety factor, posing safety risks; and third, the maintenance quality is not guaranteed, resulting in a high return rate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method thereof, so as to solve the shortcomings of the prior art such as low maintenance efficiency, potential safety hazards and high repair rate.

[0005] For the inspection and maintenance of the parking device components, the oil cylinder needs to be pressurized, mainly to check whether there is any oil leakage in the oil cylinder and pipe joints. If the oil cylinder leaks, a new oil cylinder needs to be replaced; if the oil pipe joint leaks, loosen the joint, replace the corresponding type of sealing ring, and then tighten it; if the oil pipe is damaged and leaks, a new oil pipe needs to be replaced. After replacing the oil cylinder or oil pipe, it is necessary to check whether the oil level in the oil tank in the parking device control box is sufficient. If the oil level is insufficient, the oil needs to be filled up. The second is the system pressure test. When the system pressure does not meet the standard, the parking device cannot be relieved in place. The test pressure gauge can be connected and the pressure of the overflow valve can be checked. If it is less than (8±0.5)Mpa, the pressure value needs to be readjusted to (8±0.5)Mpa, and tightened, and then the parking device relief action status is observed. The present invention is aimed at the circulation detection requirements of the oil cylinder, and provides an independent oil cylinder detection control system and its control method.

[0006] The technical solution to solve the above technical problems is: a hump marshalling yard parking device hydraulic pump station cylinder detection and control system, including a power supply, a main power switch K1, a motor M for controlling the action of the hydraulic pump station cylinder, a motor forward control contact for controlling the motor forward rotation to pressurize the hydraulic pump station cylinder to achieve parking device action braking, a motor reverse control contact for controlling the motor reverse rotation to depressurize the hydraulic pump station cylinder to achieve parking device action relief, a braking AC contactor circuit for controlling the connection and disconnection of the motor forward control contact, a relief AC contactor circuit for controlling the connection and disconnection of the motor reverse control contact, an automatic circulation control circuit, and a relay delay control circuit; the power supply is connected in series with the main power switch K1, and the main power switch K1 is connected in series with the motor M through the motor forward control contact or the motor reverse control contact; the input end of the automatic circulation control circuit is connected to the output end of the main power switch K1, the output end of the automatic circulation control circuit is respectively connected to the braking AC contactor circuit and the relay delay control circuit, and the output end of the relay delay control circuit is respectively connected to the braking AC contactor circuit and the relief AC contactor circuit.

[0007] A further technical solution of the present invention is that the motor M is a DC motor, and a voltage regulator and a rectifier bridge are connected in series between the main power switch K1 and the motor forward control contact or the motor reverse control contact.

[0008] A further technical solution of the present invention is: the automatic cycle control circuit includes a reciprocating cycle time relay SJ and a reciprocating cycle time relay normally open contact 8-5, the reciprocating cycle time relay SJ is used to control the attraction and disconnection of the reciprocating cycle time relay normally open contact 8-5, the reciprocating cycle time relay SJ is connected to the circuit between the main power switch K1 and the voltage regulator; the reciprocating cycle time relay normally open contact 8-5 is connected between the main power switch K1 and the braking AC contactor circuit, the relief AC contactor circuit, and the relay delay control circuit.

[0009] A further technical solution of the present invention is: the motor forward rotation control contacts include the motor forward rotation normally open contact ZD1-2 and the motor forward rotation normally open contact ZD3-4, the motor forward rotation normally open contact ZD1-2 is connected between the third terminal of the rectifier bridge and the second terminal of the motor M, and the motor forward rotation normally open contact ZD3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge; the motor reverse rotation control contacts include the motor reverse rotation normally open contact HJ1-2 and the motor reverse rotation normally open contact HJ3-4, the motor reverse rotation normally open contact HJ1-2 is connected between the third terminal of the rectifier bridge and the first terminal of the motor M, and the motor reverse rotation normally open contact HJ3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge.

[0010] A further technical solution of the present invention is: the relay delay control circuit includes a rectifier, a time relay 1J, a stepless relay 2J, a contact 1J41, a contact 1J31, and a contact 2J11; the rectifier is used to convert AC power into DC power to supply the time relay 1J and the stepless relay 2J, and the input end of the rectifier is connected to the normally open contact 8-5 of the reciprocating cycle time relay; the stepless relay 2J is connected in parallel with a slow-release circuit composed of an electrolytic capacitor C and a resistor R, and then connected in series with the contact 1J41, and then connected in parallel with the time relay 1J and then connected in series with the output end of the rectifier; the contact 1J41 is connected in parallel with the time relay 1J is connected when it is energized and enters the slow-absorbing state. The contact 1J31 is connected between the normally open contact 8-5 of the reciprocating cycle time relay and the braking AC contactor circuit and the relief AC contactor circuit; the contact 1J31 is connected to the normally open contact 8-5 of the compound cycle time relay and the braking AC contactor circuit when it falls normally, and is connected to the normally open contact 8-5 of the compound cycle time relay and the relief AC contactor circuit when the time relay 1J is absorbed; the contact 2J11 is also connected between the contact 1J31 and the input end of the relief AC contactor HJ; the contact 2J11 is connected to the relief AC contactor circuit when the stepless relay 2J falls.

[0011] A further technical solution of the present invention is: the braking AC contactor circuit includes a braking AC contactor ZD and normally closed contacts HJ41-42 connected in series, and the relief AC contactor circuit includes a relief AC contactor HJ and normally closed contacts ZD41-42 connected in series; when the braking AC contactor ZD is energized, the motor forward normally open contacts ZD1-2 and the motor forward normally open contacts ZD3-4 are closed and connected, and the normally closed contacts ZD41-42 are disconnected; when the relief AC contactor HJ is energized, the motor reverse normally open contacts HJ1-2 and the motor reverse normally open contacts HJ3-4 are closed and connected, and the normally closed contacts HJ41-42 are disconnected.

[0012] A further technical solution of the present invention is: a manual / automatic transfer switch K2 is also connected between the output end of the main power switch and the reciprocating cycle time relay SJ, end 1 of the manual / automatic transfer switch K2 is connected to the main power switch, end 2 of the manual / automatic transfer switch K2 is respectively connected to the reciprocating cycle time relay SJ and the normally open contact 8-5 of the reciprocating cycle time relay, and end 3 of the manual / automatic transfer switch K2 is connected to the manual cycle control circuit.

[0013] A further technical solution of the present invention is: the manual cycle control circuit includes an automatic normally open button ZDA1-2, an automatic normally closed button ZDA3-4, and a relief button HJA1-2, one end of the automatic normally open button ZDA1-2 is connected to the 3 end of the manual / automatic transfer switch K2, and the 2 ends of the automatic normally open button ZDA1-2 are connected to the input end of the braking AC contactor ZD; the automatic normally closed button ZDA3-4 is connected in series between the output end of the reciprocating cycle time relay switch KSJ8-5 and the input end of the rectifier; one end of the relief button HJA1-2 is connected to the 3 end of the manual / automatic transfer switch K2, and the 2 ends of the relief button HJA1-2 are connected to the input end of the relief AC contactor HJ.

[0014] Another technical solution of the present invention is: a method for detecting and controlling the oil cylinder of a hydraulic pump station of a hump marshalling yard parking device, the method detecting the oil cylinder of the hydraulic pump station by automatically circulating a control motor, comprising the following steps:

[0015] S1. Connection circuit:

[0016] Connect the circuit according to the circuit diagram;

[0017] S2. Set the detection circuit cycle working time:

[0018] Toggle the switch on the reciprocating cycle time relay SJ to set the relief time T1 and pressure holding time T2, and set the slow suction time T3 on the time relay 1J;

[0019] S3, Start

[0020] Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence, and the manual / automatic transfer switch K2 is in the automatic position 1-2;

[0021] S4, motor forward

[0022] The normally open contact 8-5 of the reciprocating cycle time relay is connected, the braking AC contactor ZD is connected, the motor M is connected to the forward rotation circuit through the braking AC contactor ZD, and the parking device enters the braking state; at the same time, the circuit of the time relay 1J is connected, and the time relay 1J enters the slow-absorbing state;

[0023] S5, stepless relay 2J slow release

[0024] The stepless relay 2J is connected to the excitation circuit via the contact 1J41, and the RC release circuit in parallel with the stepless relay 2J releases for several seconds to protect the motor during the process from braking to release.

[0025] S6, motor stops

[0026] The time relay 1J is energized after a slow energizing time of T3, cutting off the braking AC contactor circuit and disconnecting the motor M circuit, causing the motor M to stop rotating.

[0027] S7, motor reverse:

[0028] The stepless relay 2J slowly drops down for several seconds after the time relay 1J is pulled up for T3, connecting the relief AC contactor circuit. The relief AC contactor HJ connects the reverse circuit of the motor M, the oil cylinder is decompressed, and the parking device is relieved.

[0029] S8, Cylinder pressure maintenance:

[0030] When the motor M moves to the relief time T1 set by the reciprocating cycle time relay SJ, the normally open contact 8-5 of the reciprocating cycle time relay is disconnected, the relief AC contactor HJ and the time relay 1J are restored, the motor M stops working, and the cylinder enters the pressure holding state for a pressure holding time of T2.

[0031] S9: Determine whether the test is completed

[0032] Check the quality of the oil cylinder. If it meets the requirements, the test is completed. If not, repeat step S3. If it is, automatically control the motor to work in a cycle to detect the working status and quality of the oil cylinder of the hydraulic pump station, and the test is completed.

[0033] Another technical solution of the present invention is: a method for detecting and controlling the oil cylinder of a hydraulic pump station of a hump marshalling yard parking device, the method detecting the oil cylinder of the hydraulic pump station by manually circulating a control motor, comprising the following steps:

[0034] S1. Connection circuit:

[0035] Connect the circuit according to the circuit diagram;

[0036] S2, Start

[0037] Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence, and the manual / automatic transfer switch K2 should be in the manual position 1-3;

[0038] S3, motor forward

[0039] Press the automatic normally open button ZDA1-2, the brake AC contactor ZD is turned on, the motor M is connected to the forward circuit through the brake AC contactor ZD, and the parking device enters the braking state; the automatic normally closed button ZDA3-4 is disconnected and the time relay 1J is cut off;

[0040] S4, motor stops

[0041] Release the automatic normally open button ZDA1-2, cut off the braking AC contactor circuit, the braking AC contactor ZD disconnects the motor M circuit, and the motor M stops rotating;

[0042] S5, motor reverse:

[0043] Press the release button HJA1-2, which switches on the release AC contactor circuit. The release AC contactor HJ switches on the reverse circuit of the motor M, decompressing the oil cylinder and releasing the parking mechanism.

[0044] S6, Cylinder pressure maintenance:

[0045] Release the relief button HJA1-2, which cuts off the relief AC contactor circuit, stops the motor M from working, and the oil cylinder enters the pressure holding state;

[0046] S7: Determine whether the test is completed

[0047] Check the oil cylinder. If the oil cylinder meets the technical requirements, the test is completed. If not, repeat step S2; if so, manually control the motor to cycle and check the working status and quality of the oil cylinder of the hydraulic pump station. The test is completed.

[0048] Due to the above structure, the hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method thereof of the present invention have the following beneficial effects compared with the prior art:

[0049] 1. High maintenance efficiency

[0050] The present invention includes a power supply, a main power switch K1, a motor M for controlling the action of the hydraulic pump station cylinder, a motor forward rotation control contact for controlling the motor to pressurize the hydraulic pump station cylinder to achieve parking brake action, a motor reverse rotation control contact for controlling the motor to depressurize the hydraulic pump station cylinder to achieve parking brake action relief, a braking AC contactor circuit for controlling the connection and disconnection of the motor forward rotation control contact, a relief AC contactor circuit for controlling the connection and disconnection of the motor reverse rotation control contact, an automatic circulation control circuit, and a relay delay control circuit; the automatic circulation control circuit drives the braking AC contactor circuit, the relay delay control circuit, and the relief AC contactor circuit, thereby automatically controlling the forward rotation, reverse rotation, and stop of the motor, wherein the forward rotation of the motor can pressurize the hydraulic pump station cylinder to achieve parking brake action, and the reverse rotation of the motor can depressurize the hydraulic pump station cylinder to achieve parking brake action relief. Therefore, the present invention can realize automatic circulation fault detection of the cylinder action circuit, and its maintenance process is simple, the connection equipment is also simple, and the maintenance efficiency is high.

[0051] 2. Reliable performance

[0052] The present invention can realize multiple time settings by using the reciprocating cycle time relay SJ of the automatic cycle control circuit in the circuit, which is very effective in realizing the automatic control function of the system and has relatively reliable performance.

[0053] In the relay delay control circuit of the present invention, the purpose of using contact 2J11 is to utilize the release function of the stepless relay 2J when switching between braking and relief, delaying the connection of the relief circuit for 3 seconds, ensuring that the motor is restarted (forward-reverse) after stopping, and reducing the starting torque of the motor; in the braking AC contactor circuit, the purpose of using normally closed contacts HJ41-42 is to realize the mutual cutting function of braking and relief, that is, to cut off the braking control circuit during relief; the purpose of using ZD41-42 in the relief AC contactor circuit is to realize the mutual cutting function of relief and braking, that is, to cut off the relief control circuit during braking.

[0054] Therefore, the performance of the present invention is more reliable.

[0055] 3. High safety performance Since the present invention can realize automatic cycle fault detection of the oil cylinder action circuit, it can greatly improve the detection quality of the oil cylinder, control the occurrence of oil cylinder failure in the hydraulic pump station, and ensure driving safety.

[0056] 4. Low rework rate Since the present invention can realize automatic cycle fault detection of the oil cylinder action circuit, it avoids the influence of human factors, can ensure the quality of maintenance, and thus can greatly reduce the rework rate.

[0057] 5. Flexible use

[0058] The present invention can not only realize the fault detection of the oil cylinder action circuit by automatic circulation, but also realize the fault detection of the oil cylinder action circuit by manual circulation according to actual needs, and is more flexible to use.

[0059] 6. Reduce the workload of personnel. Since the present invention can realize automatic cycle fault detection of the cylinder action circuit, it can effectively reduce the workload of maintenance personnel. In addition, the equipment is simple, safe and reliable, with a low failure rate, and fault diagnosis is intuitive and convenient.

[0060] 7. Good application effect. Since the present invention can realize automatic cycle fault detection of the oil cylinder action circuit, the inspection and maintenance quality of the parking device equipment is significantly improved, the failure rate of the parking device is reduced, and the maintenance personnel's ability to inspect and repair the parking device hydraulic pump station system and handle emergency faults is improved, ensuring the safety and stability of the marshalling and disassembling operations in the marshalling yard, and achieving better application effect.

[0061] 8. Wide range of applications

[0062] The present invention is applicable not only to railway enterprises, but also to higher vocational colleges and relevant majors and positions of railway enterprises for training and research on related technologies.

[0063] The technical features of the hump marshalling yard parking device hydraulic pump station oil cylinder detection control system and method thereof of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 : Structural block diagram of the cylinder detection and control system of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in Example 1 (automatic cycle only),

[0065] Figure 2 : Circuit diagram of the cylinder detection control system of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in Example 1 (automatic cycle only),

[0066] Figure 3 : Structural block diagram of the cylinder detection control system of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in Example 2 (manual / automatic cycle),

[0067] Figure 4 : Circuit diagram of the cylinder detection control system of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in the second embodiment (manual / automatic cycle),

[0068] Figure 5 : Flowchart of the oil cylinder detection control method of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in the third and fourth embodiments, Figure 6 : Flowchart of the oil cylinder detection control method of the hydraulic pump station of the hump marshalling yard parking device of the present invention as described in Example 5. DETAILED DESCRIPTION

[0069] Example 1

[0070] A detection and control system for a hydraulic pump station cylinder of a hump marshalling yard parking device includes a power supply, a main power switch K1, a voltage regulator, a rectifier bridge, a motor M for controlling the action of the hydraulic pump station cylinder, a motor forward rotation control contact for controlling the motor to rotate forward to pressurize the hydraulic pump station cylinder and thereby brake the parking device, a motor reverse rotation control contact for controlling the motor to rotate reversely to depressurize the hydraulic pump station cylinder and thereby relieve the parking device, a braking AC contactor circuit for controlling the connection and disconnection of the motor forward rotation control contact, a relief AC contactor circuit for controlling the connection and disconnection of the motor reverse rotation control contact, an automatic circulation control circuit, and a relay delay control circuit; wherein:

[0071] The power supply is AC220V, and the motor M adopts a DC motor. The power supply is connected in series with the main power switch K1, the voltage regulator, and the rectifier bridge in sequence, and a DC voltmeter is connected in parallel to the output end of the rectifier bridge. The rectifier bridge is connected in series with the motor M through the motor forward control contact or the motor reverse control contact; the input end of the automatic circulation control circuit is connected to the output end of the main power switch K1, and the output end of the automatic circulation control circuit is respectively connected to the braking AC contactor circuit and the relay delay control circuit, and the output end of the relay delay control circuit is respectively connected to the braking AC contactor circuit and the relief AC contactor circuit.

[0072] The automatic cycle control circuit includes a reciprocating cycle time relay SJ and a reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ is used to control the attraction and disconnection of the reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ adopts the DH48S reciprocating cycle time relay. The reciprocating cycle time relay SJ is connected to the circuit between the main power switch K1 and the voltage regulator; the reciprocating cycle time relay normally open contact 8-5 is connected between the main power switch K1 and the braking AC contactor circuit, the relief AC contactor circuit, and the relay delay control circuit.

[0073] The motor forward rotation control contacts include a motor forward rotation normally open contact ZD1-2 and a motor forward rotation normally open contact ZD3-4. The motor forward rotation normally open contact ZD1-2 is connected between the third terminal of the rectifier bridge and the second terminal of the motor M, and the motor forward rotation normally open contact ZD3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge; the motor reverse rotation control contacts include a motor reverse rotation normally open contact HJ1-2 and a motor reverse rotation normally open contact HJ3-4. The motor reverse rotation normally open contact HJ1-2 is connected between the third terminal of the rectifier bridge and the first terminal of the motor M, and the motor reverse rotation normally open contact HJ3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge.

[0074] The relay delay control circuit includes a rectifier, a time relay 1J, a stepless relay 2J, a contact 1J41, a contact 1J31, and a contact 2J11; the rectifier adopts a 24V rectifier, the time relay 1J adopts a JSBXC-850 semiconductor time relay, and the stepless relay 2J adopts a JWXC-1700 stepless relay; the rectifier is used to convert AC power into DC power to supply the time relay 1J and the stepless relay 2J, and the input end of the rectifier is connected to the normally open contact 8-5 of the reciprocating cycle time relay; the stepless relay 2J is connected in parallel with a slow-release circuit composed of an electrolytic capacitor C and a resistor R, and then connected in series with the contact 1J41, and then connected in parallel with the time relay 1J and connected in series with the output end of the rectifier, wherein the electrolytic capacitor C and the resistor R are connected in parallel. Capacitor C uses a 4700μF electrolytic capacitor and resistor R uses a 750Ω resistor; the contact 1J41 is connected when the time relay 1J is energized and enters the slow-absorbing state; the contact 1J31 is connected between the normally open contact 8-5 of the reciprocating cycle time relay and the braking AC contactor circuit and the relief AC contactor circuit; the contact 1J31 is connected to the normally open contact 8-5 of the reciprocating cycle time relay and the braking AC contactor circuit when the normal state falls, and is connected to the normally open contact 8-5 of the reciprocating cycle time relay and the relief AC contactor circuit when the time relay 1J is absorbed; the contact 2J11 is also connected between the contact 1J31 and the input end of the relief AC contactor HJ; the contact 2J11 is connected to the relief AC contactor circuit when the stepless relay 2J falls. The purpose of using contact 2J11 in the present invention is to utilize the release function of stepless relay 2J to delay the connection of the release circuit for 3 seconds when switching between braking and release, so as to ensure that the motor can be restarted (forward-reverse) after stopping, thereby reducing the starting torque of the motor.

[0075] The braking AC contactor circuit includes a braking AC contactor ZD and normally closed contacts HJ41-42 connected in series. The purpose of using the normally closed contacts HJ41-42 is to realize the mutual cutting function of braking and relief, that is, to cut off the braking control circuit during relief; the relief AC contactor circuit includes a relief AC contactor HJ and normally closed contacts ZD41-42 connected in series. The purpose of using the normally closed contacts ZD41-42 is to realize the mutual cutting function of relief and braking, that is, to cut off the relief control circuit during braking; when the braking AC contactor ZD is energized, the motor forward normally open contacts ZD1-2 and the motor forward normally open contacts ZD3-4 are closed and connected, and the normally closed contacts ZD41-42 are disconnected; when the relief AC contactor HJ is energized, the motor reverse normally open contacts HJ1-2 and the motor reverse normally open contacts HJ3-4 are closed and connected, and the normally closed contacts HJ41-42 are disconnected.

[0076] Example 2

[0077] A hump marshalling yard parking device hydraulic pump station oil cylinder detection and control system, the system can realize both automatic circulation control and manual circulation control of oil cylinder action, its structure is basically the same as that of embodiment 1, except that: the system also includes a manual circulation control circuit, and a manual / automatic transfer switch K2 is connected between the output end of the main power switch and the reciprocating circulation time relay SJ and the reciprocating circulation time relay normally open contact 8-5, the manual / automatic transfer switch K2 has a 1 end connected to the main power switch, the 2 ends of the manual / automatic transfer switch K2 are respectively connected to the reciprocating circulation time relay SJ and the reciprocating circulation time relay normally open contact 8-5, and the 3 ends of the manual / automatic transfer switch K2 are connected to the manual circulation control circuit.

[0078] The manual cycle control circuit includes an automatic normally open button ZDA1-2, an automatic normally closed button ZDA3-4, and a relief button HJA1-2. End 1 of the automatic normally open button ZDA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the automatic normally open button ZDA1-2 is connected to the input end of the braking AC contactor ZD; the automatic normally closed button ZDA3-4 is connected in series between the output end of the reciprocating cycle time relay switch KSJ8-5 and the input end of the rectifier; end 1 of the relief button HJA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the relief button HJA1-2 is connected to the input end of the relief AC contactor HJ.

[0079] The specific structure of the hydraulic pump station cylinder detection and control system for a hump marshalling yard parking device described in the second embodiment is as follows: A hump marshalling yard parking device hydraulic pump station cylinder detection and control system includes a power supply, a main power switch K1, a voltage regulator, a rectifier bridge, a motor M for controlling the action of the hydraulic pump station cylinder, a motor forward control contact for controlling the motor to rotate forward to pressurize the hydraulic pump station cylinder to achieve braking of the parking device, a motor reverse control contact for controlling the motor to reverse to depressurize the hydraulic pump station cylinder to achieve relief of the parking device, a braking AC contactor circuit for controlling the connection and disconnection of the motor forward control contact, a relief AC contactor circuit for controlling the connection and disconnection of the motor reverse control contact, an automatic cycle control circuit, a relay delay control circuit, and a manual cycle control circuit; wherein:

[0080] The power supply is AC220V, and the motor M adopts a DC motor. The power supply is connected in series with the main power switch K1, the voltage regulator, and the rectifier bridge in sequence, and a DC voltmeter is connected in parallel to the output end of the rectifier bridge. The rectifier bridge is connected in series with the motor M through the motor forward control contact or the motor reverse control contact; the input end of the automatic circulation control circuit is connected to the output end of the main power switch K1, and the output end of the automatic circulation control circuit is respectively connected to the braking AC contactor circuit and the relay delay control circuit, and the output end of the relay delay control circuit is respectively connected to the braking AC contactor circuit and the relief AC contactor circuit.

[0081] The automatic cycle control circuit includes a reciprocating cycle time relay SJ and a reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ is used to control the attraction and disconnection of the reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ adopts the DH48S reciprocating cycle time relay. The reciprocating cycle time relay SJ is connected to the circuit between the main power switch K1 and the voltage regulator; the reciprocating cycle time relay normally open contact 8-5 is connected between the main power switch K1 and the braking AC contactor circuit, the relief AC contactor circuit, and the relay delay control circuit.

[0082] A manual / automatic transfer switch K2 is also connected between the output end of the main power switch and the reciprocating cycle time relay SJ and the normally open contact 8-5 of the reciprocating cycle time relay. End 1 of the manual / automatic transfer switch K2 is connected to the main power switch, and ends 2 of the manual / automatic transfer switch K2 are respectively connected to the reciprocating cycle time relay SJ and the normally open contact 8-5 of the reciprocating cycle time relay. End 3 of the manual / automatic transfer switch K2 is connected to the manual cycle control circuit.

[0083] The motor forward rotation control contacts include a motor forward rotation normally open contact ZD1-2 and a motor forward rotation normally open contact ZD3-4. The motor forward rotation normally open contact ZD1-2 is connected between the third terminal of the rectifier bridge and the second terminal of the motor M, and the motor forward rotation normally open contact ZD3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge; the motor reverse rotation control contacts include a motor reverse rotation normally open contact HJ1-2 and a motor reverse rotation normally open contact HJ3-4. The motor reverse rotation normally open contact HJ1-2 is connected between the third terminal of the rectifier bridge and the first terminal of the motor M, and the motor reverse rotation normally open contact HJ3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge.

[0084] The relay delay control circuit includes a rectifier, a time relay 1J, a stepless relay 2J, a contact 1J41, a contact 1J31, and a contact 2J11; the rectifier adopts a 24V rectifier, the time relay 1J adopts a JSBXC-850 semiconductor time relay, and the stepless relay 2J adopts a JWXC-1700 stepless relay; the rectifier is used to convert AC power into DC power to supply the time relay 1J and the stepless relay 2J, and the input end of the rectifier is connected to the normally open contact 8-5 of the reciprocating cycle time relay; the stepless relay 2J is connected in parallel with a slow-release circuit composed of an electrolytic capacitor C and a resistor R, and then connected in series with the contact 1J41, and then connected in parallel with the time relay 1J and connected in series with the output end of the rectifier, wherein the electrolytic capacitor C and the resistor R are connected in parallel. Capacitor C adopts 4700μF electrolytic capacitor, and resistor R adopts 750Ω resistor; the contact 1J41 is connected when the time relay 1J is energized and enters the slow suction state, and the contact 1J31 is connected between the normally open contact 8-5 of the reciprocating cycle time relay and the braking AC contactor circuit and the relief AC contactor circuit; the contact 1J31 is connected to the normally open contact 8-5 of the compound cycle time relay and the braking AC contactor circuit when the normal state falls, and is connected to the normally open contact 8-5 of the compound cycle time relay and the relief AC contactor circuit when the time relay 1J is attracted; the contact 2J11 is also connected between the contact 1J31 and the input end of the relief AC contactor HJ; the contact 2J11 is connected to the relief AC contactor circuit when the stepless relay 2J falls. The purpose of using contact 2J11 in the present invention is to utilize the release function of stepless relay 2J to delay the connection of the release circuit for 3 seconds when switching between braking and release, so as to ensure that the motor can be restarted (forward-reverse) after stopping, thereby reducing the starting torque of the motor.

[0085] The braking AC contactor circuit includes a braking AC contactor ZD and normally closed contacts HJ41-42 connected in series. The purpose of using the normally closed contacts HJ41-42 is to realize the mutual cutting function of braking and relief, that is, to cut off the braking control circuit during relief; the relief AC contactor circuit includes a relief AC contactor HJ and normally closed contacts ZD41-42 connected in series. The purpose of using ZD41-42 is to realize the mutual cutting function of relief and braking, that is, to cut off the relief control circuit during braking; when the braking AC contactor ZD is energized, the motor forward normally open contacts ZD1-2 and the motor forward normally open contacts ZD3-4 are closed and connected, and the normally closed contacts ZD41-42 are disconnected; when the relief AC contactor HJ is energized, the motor reverse normally open contacts HJ1-2 and the motor reverse normally open contacts HJ3-4 are closed and connected, and the normally closed contacts HJ41-42 are disconnected.

[0086] The manual cycle control circuit includes an automatic normally open button ZDA1-2, an automatic normally closed button ZDA3-4, and a relief button HJA1-2. End 1 of the automatic normally open button ZDA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the automatic normally open button ZDA1-2 is connected to the input end of the braking AC contactor ZD; the automatic normally closed button ZDA3-4 is connected in series between the output end of the reciprocating cycle time relay switch KSJ8-5 and the input end of the rectifier; end 1 of the relief button HJA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the relief button HJA1-2 is connected to the input end of the relief AC contactor HJ.

[0087] Example 3:

[0088] A method for detecting and controlling the cylinder of a hydraulic pump station for a hump marshalling yard parking device is provided. The method uses the cylinder detection and control system for the hydraulic pump station for a hump marshalling yard parking device described in Example 1 to automatically cycle control a motor to detect the cylinder of the hydraulic pump station, including the following steps:

[0089] S1. Connection circuit:

[0090] according to Figure 2 Connect the circuit as described in the circuit diagram;

[0091] S2. Set the detection circuit cycle working time:

[0092] According to the on-site control parking device's braking time of 7-9 seconds and release time of 15-20 seconds, flip the switch on the reciprocating cycle time relay SJ to set the release time T1 to 30 seconds and the pressure holding time T2 to 3 minutes. Setting the pressure holding time T2 to a longer time can better test the airtightness and safety of the cylinder circuit; set the slow suction time T3 to 13 seconds on the time relay 1J and the slow release time to 3 seconds on the stepless relay 2J;

[0093] S3, Start

[0094] Turn on the main power switch K1, the voltage regulator adjusts the 220V AC power supply, and outputs 190V DC power supply to the motor after rectification by the rectifier bridge. The DC power supply is connected to the motor through the motor forward control contact or the motor reverse control contact;

[0095] S4, motor forward

[0096] The normally open contact 8-5 of the reciprocating cycle time relay is connected, and the braking AC contactor ZD is connected. At this time, the current flows as follows: 1-2 terminals of the main power switch K1 → normally open contact 8-5 of the reciprocating cycle time relay → contact 1J31 closes downward to connect the braking AC contactor circuit → normally closed contacts HJ41-42 → A1-A2 terminals of the braking AC contactor ZD → 4-3 terminals of the main power switch K1; the motor M is connected to the forward rotation circuit through the braking AC contactor ZD, and the current flows as follows: 1-2 terminals of the main power switch K1 → 1st terminal of the voltage regulator -3 terminal → 1-3 terminal of the rectifier bridge → motor forward rotation normally open contact ZD1-2 → 2-3 terminal of motor M → motor forward rotation normally open contact ZD3-4 → 4-2 terminal of the rectifier bridge → 4-2 terminal of the voltage regulator → 3-4 terminal of the main power switch K1; the parking device enters the braking state, and the braking time is 13 seconds; at the same time, the slow-absorbing circuit of the time relay 1J is connected, and the current flows as follows: 1-2 terminal of the main power switch K1 → rectifier positive electrode → 73-62 terminal of the time relay 1J → rectifier negative electrode → 4-3 terminal of the main power switch K1;

[0097] S5, stepless relay 2J slow release

[0098] After the stepless relay 2J is connected via contact 1J41, the excitation circuit is connected. The current flows as follows: rectifier positive electrode → terminals 1-4 of stepless relay 2J → contact 1J41 → rectifier negative electrode. At the same time, the RC circuit connected in parallel with stepless relay 2J is charged. After time relay 1J is attracted, the RC circuit discharges the coil of stepless relay 2J, causing stepless relay 2J to release slowly. The release time is 3 seconds. The purpose is to protect the motor during the process from braking to release.

[0099] S6, motor stops

[0100] After the slow-in time T3 is up, the time relay 1J is attracted, the contact 1J31 is disconnected, the braking AC contactor circuit is cut off, the motor M circuit is disconnected, and the motor M stops rotating;

[0101] S7, motor reverse:

[0102] The stepless relay 2J drops after the time relay 1J is pulled up for time T3, and immediately connects and relieves the AC contactor HJ circuit. The current flows as follows: 1-2 terminals of the main power switch K1 → normally open contacts 8-5 of the reciprocating cycle time relay → contact 1J31 connects and relieves the AC contactor circuit → contact 2J11 → normally closed contacts ZD41-42 → B1-B2 terminals of the AC contactor HJ → 4-3 terminals of the main power switch K1, which relieves the AC contactor HJ from connecting to the reversing circuit of the motor M. The current flows as follows: positive pole of the rectifier bridge → normally open contacts HJ1-2 of the motor reversing → motor M1-3 → normally open contacts HJ3-4 of the motor reversing → negative pole of the rectifier bridge, the oil cylinder is decompressed, and the parking device is relieved.

[0103] S8, Cylinder pressure maintenance:

[0104] When the motor M moves to the relief time T1 set by the reciprocating cycle time relay SJ, the normally open contact 8-5 of the reciprocating cycle time relay is disconnected, the relief AC contactor HJ and the time relay 1J are restored, the motor M stops working, and the cylinder enters the pressure holding state for a pressure holding time of T2.

[0105] S9: Determine whether the test is completed

[0106] Determine whether the detection is completed. If not, repeat step S3; if yes, automatically control the motor to cycle and detect the working status and quality of the hydraulic pump station cylinder, and the detection is completed.

[0107] Example 4:

[0108] A method for detecting and controlling the cylinder of a hydraulic pump station for a hump marshalling yard parking device is provided. The method uses the cylinder detection and control system for the hydraulic pump station for a hump marshalling yard parking device described in Example 2 to automatically cycle control a motor to detect the cylinder of the hydraulic pump station, including the following steps:

[0109] S1. Connection circuit:

[0110] according to Figure 4 Connect the circuit as described in the circuit diagram;

[0111] S2. Set the detection circuit cycle working time:

[0112] According to the on-site control parking device's braking time of 7-9 seconds and release time of 15-20 seconds, flip the switch on the reciprocating cycle time relay SJ to set the release time T1 to 30 seconds and the pressure holding time T2 to 3 minutes. Setting the pressure holding time T2 to a longer time can better test the airtightness and safety of the cylinder circuit; set the slow suction time T3 to 13 seconds on the time relay 1J and the slow release time to 3 seconds on the stepless relay 2J;

[0113] S3, Start

[0114] Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence. The manual / automatic transfer switch K2 is in the automatic position 1-2. The voltage regulator regulates the 220V AC power supply and outputs 190V DC power supply to the motor after rectification by the rectifier bridge. The DC power supply is connected to the motor through the motor forward control contact or the motor reverse control contact.

[0115] S4, motor forward

[0116] The normally open contact 8-5 of the reciprocating cycle time relay is connected, and the braking AC contactor ZD is connected. At this time, the current flows as follows: 1-2 terminals of the main power switch K1 → 1-2 terminals of the manual / automatic transfer switch K2 → normally open contact 8-5 of the reciprocating cycle time relay → contact 1J31 closes downward to connect the braking AC contactor circuit → normally closed contacts HJ41-42 → A1-A2 terminals of the braking AC contactor ZD → 4-3 terminals of the main power switch K1; the motor M is connected to the forward rotation circuit through the braking AC contactor ZD, and the current flows as follows: 1-2 terminals of the main power switch K1 → 1st terminal of the voltage regulator -3 terminal → 1-3 terminal of the rectifier bridge → motor forward rotation normally open contact ZD1-2 → 2-3 terminal of motor M → motor forward rotation normally open contact ZD3-4 → 4-2 terminal of the rectifier bridge → 4-2 terminal of the voltage regulator → 3-4 terminal of the main power switch K1; the parking device enters the braking state, and the braking time is 13 seconds; at the same time, the slow-absorbing circuit of the time relay 1J is connected, and the current flows as follows: 1-2 terminal of the main power switch K1 → 1-2 terminal of the manual / automatic transfer switch K2 → rectifier positive pole → 73-62 terminal of the time relay 1J → rectifier negative pole → 4-3 terminal of the main power switch K1;

[0117] S5, stepless relay 2J slow release

[0118] After the stepless relay 2J is connected via contact 1J41, the excitation circuit is connected. The current flows as follows: rectifier positive electrode → terminals 1-4 of stepless relay 2J → contact 1J41 → rectifier negative electrode. At the same time, the RC circuit connected in parallel with stepless relay 2J is charged. After time relay 1J is attracted, the RC circuit discharges the coil of stepless relay 2J, causing stepless relay 2J to release slowly. The release time is 3 seconds. The purpose is to protect the motor during the process from braking to release.

[0119] S6, motor stops

[0120] After the slow-in time T3 is up, the time relay 1J is attracted, the contact 1J31 is disconnected, the braking AC contactor circuit is cut off, the motor M circuit is disconnected, and the motor M stops rotating;

[0121] S7, motor reverse:

[0122] The stepless relay 2J drops after the time relay 1J is pulled up for time T3, and immediately connects and relieves the AC contactor HJ circuit. The current flows as follows: 1-2 terminals of the main power switch K1 → 1-2 terminals of the manual / automatic transfer switch K2 → normally open contacts 8-5 of the reciprocating cycle time relay → contact 1J31 connects and relieves the AC contactor circuit → contact 2J11 → normally closed contacts ZD41-42 → relieves the B1-B2 terminals of the AC contactor HJ → 4-3 terminals of the main power switch K1, relieving the AC contactor HJ from connecting to the reversing circuit of the motor M. The current flows as follows: positive pole of the rectifier bridge → normally open contacts HJ1-2 of the motor reversal → 1-3 terminals of the motor M → normally open contacts HJ3-4 of the motor reversal → negative pole of the rectifier bridge, the oil cylinder is decompressed, and the parking device action is relieved;

[0123] S8, Cylinder pressure maintenance:

[0124] When the motor M moves to the relief time T1 set by the reciprocating cycle time relay SJ, the normally open contact 8-5 of the reciprocating cycle time relay is disconnected, the relief AC contactor HJ and the time relay 1J are restored, the motor M stops working, and the cylinder enters the pressure holding state for a pressure holding time of T2.

[0125] S9: Determine whether the test is completed

[0126] Determine whether the detection is completed. If not, repeat step S3; if yes, automatically control the motor to cycle and detect the working status and quality of the hydraulic pump station cylinder, and the detection is completed.

[0127] Embodiment 5:

[0128] A method for detecting and controlling the cylinder of a hydraulic pump station for a hump marshalling yard parking device is provided. The method uses the cylinder detection and control system for the hydraulic pump station for a hump marshalling yard parking device described in the third embodiment to manually cycle control a motor to detect the cylinder of the hydraulic pump station, including the following steps:

[0129] S1. Connection circuit:

[0130] according to Figure 4 Connect the circuit as described in the circuit diagram;

[0131] S2, Start

[0132] Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence. The manual / automatic transfer switch K2 is in the manual position 1-3, and the reciprocating cycle time relay SJ does not work. The voltage regulator adjusts the 220V AC power supply, and after rectification by the rectifier bridge, it outputs 190V DC power supply to the motor. The DC power supply is connected to the motor through the normally open contact of the AC contactor.

[0133] S3, motor forward

[0134] Press the automatic button ZDA, the brake AC contactor ZD is connected, and the current flows as follows: 1-2 terminals of the main power switch K1 → 1-3 terminals of the manual / automatic transfer switch K2 → automatic normally open buttons ZDA1-2 → normally closed contacts HJ41-42 → A1-A2 terminals of the brake AC contactor ZD → 3-4 terminals of the main power switch K1. The motor M is connected to the forward rotation circuit through the brake AC contactor ZD, and the current flows as follows: 1-2 terminals of the main power switch K1 → 1-3 terminals of the voltage regulator → 1-3 terminals of the rectifier bridge → motor forward rotation normally open contacts ZD1-2 → 2-3 terminals of the motor M → motor forward rotation normally open contacts ZD3-4 → 4-2 terminals of the rectifier bridge → 4-2 terminals of the voltage regulator → 3-4 terminals of the main power switch K1. The motor rotates forward, the cylinder is pressurized to realize the parking brake action, the automatic normally closed buttons ZDA3-4 are disconnected, and the excitation circuits of the time relay 1J and the stepless relay 2J are cut off.

[0135] S4, motor stops

[0136] Release the automatic normally open button ZDA1-2, which cuts off the braking AC contactor circuit, disconnects the motor M circuit, and stops the motor M;

[0137] S5, motor reverse:

[0138] Press the relief button HJA1-2, which connects to the relief AC contactor circuit. The current flows as follows: 1-2 terminals of the main power switch K1 → 1-3 terminals of the manual / automatic transfer switch K2 → relief button HJA1-2 → normally closed contacts ZD41-42 → B1-B2 terminals of the relief AC contactor HJ → 3-4 terminals of the main power switch K1. The relief AC contactor HJ connects to the reversing circuit of the motor M. The current flows as follows: positive pole of the rectifier bridge → normally open contact HJ1-2 for motor reversal → 1-3 terminals of the motor M → normally open contact HJ3-4 for motor reversal → negative pole of the rectifier bridge. The oil cylinder is decompressed and the parking device is relieved.

[0139] S6, Cylinder pressure maintenance:

[0140] Release the release button HJA1-2 to release the AC contactor HJ, the motor M stops working, and the cylinder enters the pressure holding state;

[0141] S7: Determine whether the test is completed

[0142] Determine whether the detection is completed. If not, repeat step S2. If yes, manually control the motor to cycle and detect the working status and quality of the hydraulic pump station cylinder, and the detection is completed.

[0143] In step S9 of the third and fourth embodiments and step S7 of the fifth embodiment, the working state and quality of the hydraulic pump station cylinder are detected, including: the parking device cylinder braking and releasing actions are smooth and without obstruction; the cylinder and pipeline joints are well sealed, without abnormal noise or oil leakage; when the system pressure test is not less than (8±0.5) MPa, the parking device cylinder braking and releasing actions are good;

[0144] As a variation of the above-mentioned embodiments 1 to 5, the voltage regulator may also be a transformer.

Claims

1. A cylinder detection and control system for a hydraulic pump station of a hump marshalling yard parking device, characterized by: It includes a power supply, a main power switch K1, a motor M for controlling the action of the hydraulic pump station cylinder, a motor forward control contact for controlling the motor forward rotation to pressurize the hydraulic pump station cylinder to achieve parking brake action, a motor reverse control contact for controlling the motor reverse rotation to depressurize the hydraulic pump station cylinder to achieve parking relief action, a braking AC contactor circuit for controlling the connection and disconnection of the motor forward control contact, a relief AC contactor circuit for controlling the connection and disconnection of the motor reverse control contact, an automatic circulation control circuit, and a relay delay control circuit; the power supply is connected in series with the main power switch K1, and the main power switch K1 is connected in series with the motor M through the motor forward control contact or the motor reverse control contact; the input end of the automatic circulation control circuit is connected to the output end of the main power switch K1, the output end of the automatic circulation control circuit is respectively connected to the braking AC contactor circuit and the relay delay control circuit, and the output end of the relay delay control circuit is respectively connected to the braking AC contactor circuit and the relief AC contactor circuit; The automatic cycle control circuit includes a reciprocating cycle time relay SJ and a reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ is used to control the attraction and disconnection of the reciprocating cycle time relay normally open contact 8-5. The reciprocating cycle time relay SJ adopts a DH48S reciprocating cycle time relay; the reciprocating cycle time relay SJ is connected to the circuit between the main power switch K1 and the voltage regulator; the reciprocating cycle time relay normally open contact 8-5 is connected between the main power switch K1 and the braking AC contactor circuit, the relief AC contactor circuit, and the relay delay control circuit; The motor forward rotation control contacts include a motor forward rotation normally open contact ZD1-2 and a motor forward rotation normally open contact ZD3-4. The motor forward rotation normally open contact ZD1-2 is connected between the third terminal of the rectifier bridge and the second terminal of the motor M, and the motor forward rotation normally open contact ZD3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge; the motor reverse rotation control contacts include a motor reverse rotation normally open contact HJ1-2 and a motor reverse rotation normally open contact HJ3-4. The motor reverse rotation normally open contact HJ1-2 is connected between the third terminal of the rectifier bridge and the first terminal of the motor M, and the motor reverse rotation normally open contact HJ3-4 is connected between the third terminal of the motor M and the fourth terminal of the rectifier bridge.

2. The cylinder detection and control system for the hydraulic pump station of the hump marshalling yard parking device according to claim 1 is characterized in that: The motor M is a DC motor, and a voltage regulator and a rectifier bridge are sequentially connected in series between the main power switch K1 and the motor forward control contact or the motor reverse control contact.

3. The cylinder detection and control system for the hydraulic pump station of the hump marshalling yard parking device according to claim 2 is characterized in that: The relay delay control circuit includes a rectifier, a time relay 1J, a stepless relay 2J, a contact 1J41, a contact 1J31, and a contact 2J11; the rectifier is used to convert AC power into DC power to supply the time relay 1J and the stepless relay 2J, and the input end of the rectifier is connected to the normally open contact 8-5 of the reciprocating cycle time relay; the stepless relay 2J is connected in parallel with the slow-release circuit composed of an electrolytic capacitor C and a resistor R, and then connected in series with the contact 1J41, and then connected in parallel with the time relay 1J and connected in series with the output end of the rectifier; the contact 1J41 is connected in series with the time relay 1J when it is energized and enters the slow-release circuit. It is connected when in the attracted state, and the contact 1J31 is connected between the normally open contact 8-5 of the reciprocating cycle time relay and the braking AC contactor circuit and the relief AC contactor circuit; the contact 1J31 is connected to the normally open contact 8-5 of the compound cycle time relay and the braking AC contactor circuit when it falls in the normal state, and is connected to the normally open contact 8-5 of the compound cycle time relay and the relief AC contactor circuit when the time relay 1J is attracted; the contact 2J11 is also connected between the contact 1J31 and the input end of the relief AC contactor HJ; the contact 2J11 is connected to the relief AC contactor circuit when the stepless relay 2J falls.

4. The cylinder detection and control system for the hydraulic pump station of the hump marshalling yard parking device according to claim 3 is characterized in that: The braking AC contactor circuit includes a braking AC contactor ZD and normally closed contacts HJ41-42 connected in series, and the relief AC contactor circuit includes a relief AC contactor HJ and normally closed contacts ZD41-42 connected in series; when the braking AC contactor ZD is energized, the motor forward normally open contacts ZD1-2 and the motor forward normally open contacts ZD3-4 are closed and connected, and the normally closed contacts ZD41-42 are disconnected; when the relief AC contactor HJ is energized, the motor reverse normally open contacts HJ1-2 and the motor reverse normally open contacts HJ3-4 are closed and connected, and the normally closed contacts HJ41-42 are disconnected.

5. The cylinder detection and control system for the hydraulic pump station of the hump marshalling yard parking device according to claim 4 is characterized in that: A manual / automatic transfer switch K2 is also connected between the output end of the main power switch and the reciprocating cycle time relay SJ. End 1 of the manual / automatic transfer switch K2 is connected to the main power switch, and ends 2 of the manual / automatic transfer switch K2 are respectively connected to the reciprocating cycle time relay SJ and the normally open contact 8-5 of the reciprocating cycle time relay. End 3 of the manual / automatic transfer switch K2 is connected to the manual cycle control circuit.

6. The cylinder detection and control system for the hydraulic pump station of the hump marshalling yard parking device according to claim 5 is characterized in that: The manual cycle control circuit includes an automatic normally open button ZDA1-2, an automatic normally closed button ZDA3-4, and a relief button HJA1-2. End 1 of the automatic normally open button ZDA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the automatic normally open button ZDA1-2 is connected to the input end of the braking AC contactor ZD; the automatic normally closed button ZDA3-4 is connected in series between the output end of the reciprocating cycle time relay switch KSJ8-5 and the input end of the rectifier; end 1 of the relief button HJA1-2 is connected to end 3 of the manual / automatic transfer switch K2, and end 2 of the relief button HJA1-2 is connected to the input end of the relief AC contactor HJ.

7. A method for detecting and controlling the oil cylinder of a hydraulic pump station for parking devices in a hump marshalling yard, characterized by: The method is to detect the hydraulic pump station cylinder by automatically circulating the control motor, including the following steps: S1. Connection circuit: Connect the circuit of the hydraulic pump station cylinder detection control system of the hump marshalling yard parking device according to claim 6; S2. Set the detection circuit cycle working time: Toggle the switch on the reciprocating cycle time relay SJ to set the relief time T1 and pressure holding time T2, and set the slow suction time T3 on the time relay 1J; S3, Start Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence, and the manual / automatic transfer switch K2 is in the automatic position 1-2; S4, motor forward The normally open contact 8-5 of the reciprocating cycle time relay is connected, the braking AC contactor ZD is connected, the motor M is connected to the forward rotation circuit through the braking AC contactor ZD, and the parking device enters the braking state; at the same time, the circuit of the time relay 1J is connected, and the time relay 1J enters the slow-absorbing state; S5, stepless relay 2J slow release The stepless relay 2J is connected to the excitation circuit via the contact 1J41. The RC release circuit connected in parallel with the stepless relay 2J releases the voltage for several seconds to protect the motor during the process from braking to release. S6, motor stops Time relay 1J is energized after a slow energizing time of T3, cutting off the braking AC contactor circuit and disconnecting the motor M circuit, causing the motor M to stop rotating. S7, motor reverse: The stepless relay 2J slowly drops down for several seconds after the time relay 1J is pulled up for T3, connecting the relief AC contactor circuit. The relief AC contactor HJ connects the reverse circuit of the motor M, the oil cylinder is decompressed, and the parking device is relieved. S8, oil cylinder pressure maintenance: When the motor M moves to the relief time T1 set by the reciprocating cycle time relay SJ, the normally open contact 8-5 of the reciprocating cycle time relay is disconnected, the relief AC contactor HJ and the time relay 1J are restored, the motor M stops working, and the cylinder enters the pressure holding state for a pressure holding time of T2. S9: Determine whether the test is completed Check the quality of the oil cylinder. If it meets the requirements, the test is completed. If not, repeat step S3. If it is, automatically control the motor to work in a cycle to detect the working status and quality of the oil cylinder of the hydraulic pump station, and the test is completed.

8. A method for detecting and controlling the oil cylinder of a hydraulic pump station for parking devices in a hump marshalling yard, characterized by: The method is to detect the hydraulic pump station cylinder by manually circulating the motor, including the following steps: S1. Connection circuit: Connect the circuit of the hydraulic pump station cylinder detection control system of the hump marshalling yard parking device according to claim 6; S2, Start Close the main power switch K1 and the manual / automatic transfer switch K2 in sequence, and the manual / automatic transfer switch K2 should be in the manual position 1-3; S3, motor forward Press the automatic normally open button ZDA1-2, the brake AC contactor ZD is turned on, the motor M is connected to the forward circuit through the brake AC contactor ZD, and the parking device enters the braking state; the automatic normally closed button ZDA3-4 is disconnected and the time relay 1J is cut off; S4, motor stops Release the automatic normally open button ZDA1-2, cut off the braking AC contactor circuit, the braking AC contactor ZD disconnects the motor M circuit, and the motor M stops rotating; S5, motor reverse: Press the release button HJA1-2, which switches on the release AC contactor circuit. The release AC contactor HJ switches on the reverse circuit of the motor M, decompressing the oil cylinder and releasing the parking mechanism. S6, Cylinder pressure maintenance: Release the relief button HJA1-2, which cuts off the relief AC contactor circuit, stops the motor M from working, and the oil cylinder enters the pressure holding state; S7: Determine whether the test is completed Check the oil cylinder. If the oil cylinder meets the technical requirements, the test is completed. If not, repeat step S2; if so, manually control the motor to cycle and check the working status and quality of the oil cylinder of the hydraulic pump station. The test is completed.

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