Magnetically levitated train and rescue hydraulic system, equipment and control method thereof

Abstract

The invention discloses a magnetically levitated train and a rescue hydraulic system, equipment and a control method thereof, and relates to the technical field of magnetically levitated trains. In the hydraulic system, when a reversing valve is located at a first station, an oil inlet P3 of the reversing valve is communicated with a working oil port B, and an oil return port T3 of the reversing valve is communicated with a working oil port A, and when the reversing valve is located at a second station, the oil inlet P3 of the reversing valve is communicated with the working oil port A, and the oil return port T3 of the reversing valve is communicated with the working oil port B; the oil inlet P3 and the oil return port T3 are both communicated with an inner cavity of the oil tank; the working oil port A is connected to the oil inlet P1 and the pilot oil port X2, and the oil outlet T1 is connected to a rodless cavity of the hydraulic cylinder; the working oil port B is connected to the oil inlet P2 and the pilot oil port X1, and the oil outlet T2 is connected to a rod cavity of the hydraulic cylinder; the state locking valve 21 is arranged between the oil outlet T2 and the hydraulic cylinder and used for controlling on-off of the oil way where the state locking valve 21 is located, and the hydraulic system is used for driving the rescue device so that the rescue device can be prevented from falling off in the train running process.

Description

Technical Field

[0001] This application relates to the technical field of maglev trains, and more specifically, to a maglev train and its hydraulic system, equipment and control method for rescue. Background Art

[0002] In order to cope with the problem of suspension function failure that may occur during the operation of high-speed maglev trains due to factors such as electrical equipment failures and suspension control, rescue devices can be installed on the trains to lift them when a fault occurs. However, during the normal operation of the vehicle, when passing through rail gaps, the rescue wheels of the rescue devices are prone to move in the direction of disengaging from the locked state due to friction and impact forces, making it difficult to ensure the safety of train operation.

[0003] In summary, how to prevent the rescue device from falling during train operation is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a hydraulic system for maglev train rescue, and using this hydraulic system to drive the rescue device can prevent the rescue device from falling during train operation.

[0005] Another purpose of this application is to provide a hydraulic device including the above-mentioned hydraulic system for maglev train rescue.

[0006] Another purpose of this application is to provide a control method applied to the above-mentioned hydraulic system for maglev train rescue.

[0007] Another purpose of this application is to provide a maglev train including the above-mentioned hydraulic system for maglev train rescue.

[0008] In order to achieve the above purposes, this application provides the following technical solutions:

[0009] A hydraulic system for maglev train rescue, comprising: an oil tank, a hydraulic pump, a hydraulic cylinder, a directional control valve, a balance valve for the rodless cavity circuit, a balance valve for the rod cavity circuit, and a state locking valve;

[0010] The balance valve for the rodless cavity circuit includes an oil inlet P1, an oil outlet T1, and a pilot oil port X1;

[0011] The balance valve for the rod cavity circuit includes an oil inlet P2, an oil outlet T2, and a pilot oil port X2;

[0012] The reversing valve includes an oil inlet P3, an oil return port T3, a working oil port A, and a working oil port B. When the reversing valve is in the first working position, the oil inlet P3 is communicated with the working oil port B, and the oil return port T3 is communicated with the working oil port A. When the reversing valve is in the second working position, the oil inlet P3 is communicated with the working oil port A, and the oil return port T3 is communicated with the working oil port B;

[0013] Both the oil inlet P3 and the oil return port T3 are communicated with the inner cavity of the fuel tank;

[0014] The working oil port A is connected to the oil inlet P1 and the pilot oil port X2, and the oil outlet T1 is connected to the rodless cavity of the hydraulic cylinder;

[0015] The working oil port B is connected to the oil inlet P2 and the pilot oil port X1, and the oil outlet T2 is connected to the rod cavity of the hydraulic cylinder;

[0016] The state locking valve 21 is arranged between the oil outlet T2 and the hydraulic cylinder to control the on-off of the oil circuit where it is located.

[0017] Preferably, a rod cavity pressure sensor is arranged on one side of the oil outlet T2;

[0018] The hydraulic system for maglev train rescue further includes a controller, which is signal-connected to the rod cavity pressure sensor, the reversing valve, and the hydraulic pump, and is used to receive the detection result of the rod cavity pressure sensor and control the actions of the reversing valve and the hydraulic pump.

[0019] Preferably, a rod cavity unloading valve is arranged between the oil outlet T2 and the fuel tank, and a rodless cavity unloading valve is arranged between the oil outlet T1 and the fuel tank. When the reversing valve is in the third working position, the oil inlet P3, the oil return port T3, the working oil port A, and the working oil port B are independent of each other;

[0020] A rodless cavity pressure sensor is arranged on one side of the oil outlet T1, and the controller is signal-connected to the rodless cavity pressure sensor, the rod cavity unloading valve, and the rodless cavity unloading valve, and is used to receive the detection result of the rodless cavity pressure sensor and control the actions of the rod cavity unloading valve and the rodless cavity unloading valve.

[0021] Preferably, the state locking valve is a stop valve.

[0022] Preferably, the hydraulic system for maglev train rescue includes several groups of hydraulic system sub-groups. A hydraulic system sub-group includes a multi-way joint, several rodless cavity rescue pipelines, several rod cavity rescue pipelines, and several of the hydraulic cylinders;

[0023] The multi-way joint has independent rodless cavity distribution channels and rod cavity distribution channels. In one hydraulic group, several rodless cavity rescue pipelines are connected to the rodless cavities of the corresponding hydraulic cylinders in the same hydraulic system group, and several rod cavity rescue pipelines are connected to the rod cavities of the corresponding hydraulic cylinders in the same hydraulic system group;

[0024] The oil outlet T1 is connected to the rodless cavity distribution pipeline, and several rodless cavity quick plugs I are provided on the rodless cavity distribution pipeline. The oil outlet T2 is connected to the rod cavity distribution pipeline, and several rod cavity quick plugs I are provided on the rod cavity distribution pipeline. The number of the rodless cavity quick plugs I and the rod cavity quick plugs I is equal to the number of the hydraulic system groups;

[0025] Several rodless cavity rescue pipelines are connected to the corresponding interfaces of the rodless cavity distribution channel, and several rodless cavity quick plugs I can be connected or disconnected from the corresponding interfaces of the rodless cavity distribution channel;

[0026] Several rod cavity rescue pipelines are connected to the corresponding interfaces of the rod cavity distribution channel, and several rod cavity quick plugs I can be connected or disconnected from the corresponding interfaces of the rod cavity distribution channel.

[0027] Preferably, the rodless cavity distribution pipeline includes a rodless cavity distribution main pipeline and several rodless cavity distribution branch pipelines. A rodless cavity quick plug II is provided at the first end of the rodless cavity distribution main pipeline, and the rodless cavity quick plug II can be connected or disconnected from the rodless cavity circuit balance valve. The first ends of several rodless cavity distribution branch pipelines are all connected to the second end of the rodless cavity distribution main pipeline, and rodless cavity quick plugs I are provided at the second ends of several rodless cavity distribution branch pipelines;

[0028] The rod cavity distribution pipeline includes a rod cavity distribution main pipeline and several rod cavity distribution branch pipelines. A rod cavity quick plug II is provided at the first end of the rod cavity distribution main pipeline, and the rod cavity quick plug II can be connected or disconnected from the rod cavity circuit balance valve. The first ends of several rod cavity distribution branch pipelines are all connected to the second end of the rod cavity distribution main pipeline, and rod cavity quick plugs I are provided at the second ends of several rod cavity distribution branch pipelines;

[0029] The state locking valve is arranged on the rod cavity distribution main pipeline.

[0030] Preferably, a rod cavity test point I is connected to the detection oil port of the rod cavity distribution channel, and a rodless cavity test point I is connected to the detection oil port of the rodless cavity distribution channel;

[0031] The main pipe for the rod chamber is provided with a second rod chamber test point, and the main pipe for the rodless chamber is provided with a second rodless chamber test point.

[0032] A hydraulic device for maglev train rescue includes a vehicle body suspension frame and also includes the above-mentioned hydraulic system for maglev train rescue;

[0033] The vehicle body suspension frame includes a suspension frame body, an equipment installation frame and an equipment box;

[0034] The fuel tank, hydraulic pump, reversing valve, balance valve for the rod chamber circuit, balance valve for the rodless chamber circuit, pressure sensor for the rodless chamber, and pressure sensor for the rod chamber are all arranged in the inner cavity of the equipment box;

[0035] The equipment installation frame is fixed to the bottom of the suspension frame body. The equipment installation frame has a receiving space, and the equipment box is slidably inserted into the receiving space.

[0036] Preferably, the equipment box is provided with a handle, a liquid level gauge, an oil filling port and an oil discharge port;

[0037] The handle and the liquid level gauge are both arranged on the panel of the equipment box. The handle is used as a fulcrum to drive the sliding of the equipment box, and the liquid level gauge is used to display the liquid level in the fuel tank;

[0038] One end of the oil filling port and the oil discharge port is communicated with the inner cavity of the fuel tank, and the other end extends to the outside of the equipment box. The oil filling port is used to connect an inlet pipe to inject oil into the fuel tank, and the oil discharge port is used to connect an outlet pipe to discharge the oil in the fuel tank.

[0039] Preferably, the suspension frame body includes a first cross beam and a second cross beam extending along its own width direction. A corresponding hydraulic system grouping is provided for several of the suspension frame bodies;

[0040] A multi-way joint is arranged at the middle position of the length of the first cross beam. The first cross beam is provided with several pipe supports one. Several of the pipe joints one are arranged along the length direction of the first cross beam, and several of the pipe joints one are symmetrically distributed on both sides of the multi-way joint. A pipe support two is arranged at the middle position of the length of the second cross beam;

[0041] One hydraulic system grouping includes four of the hydraulic cylinders, four rodless chamber rescue pipelines, four of the rod chamber rescue pipelines, one rodless chamber distribution branch pipeline and one of the rod chamber distribution branch pipelines;

[0042] And two of the hydraulic cylinders in one hydraulic system grouping are located on one side of the suspension frame body along its own width direction, and the other two hydraulic cylinders are located on the other side of the suspension frame body along its own width direction;

[0043] Two rodless cavity rescue pipelines and two rod cavity rescue pipelines in one of the hydraulic system groups pass through and are fixed to the pipeline support one on the first side of the multi-way joint, and the other two rodless cavity rescue pipelines and the other two rod cavity rescue pipelines pass through and are fixed to the pipeline support one on the second side of the multi-way joint;

[0044] The rodless cavity distribution branch pipeline and the rod cavity distribution branch pipeline in one of the hydraulic system groups both pass through and are fixed to the pipeline support two.

[0045] A control method for a hydraulic system for maglev train rescue, which is applied to the hydraulic system for maglev train rescue described in any one of the above, and the control method for maglev train rescue includes:

[0046] Obtain a rescue signal, control the reversing valve to be in the first working position, and control the hydraulic pump to start;

[0047] Obtain the rod cavity pressure. When the rod cavity pressure is greater than or equal to the maximum limit rescue pressure value, after delaying the rescue time, control the hydraulic pump to stop;

[0048] Obtain the rod cavity pressure again. When the rod cavity pressure is less than the minimum limit rescue pressure value, control the hydraulic pump to start;

[0049] Obtain the rod cavity pressure. When the rod cavity pressure is greater than or equal to the maximum limit rescue pressure value, control the hydraulic pump to stop;

[0050] Loop through the S3 and the S4, and determine whether the rescue signal exists. When the rescue signal disappears, stop the loop.

[0051] Preferably, after the S4, it further includes:

[0052] Obtain a cancel rescue signal, control the reversing valve to be in the second working position, and control the hydraulic pump to start;

[0053] Obtain the rodless cavity pressure. When the rodless cavity pressure is greater than the maximum limit pressure value, after delaying the cancel rescue time, control the reversing valve to remain in the third working position, control the rod cavity unloading valve and the rodless cavity unloading valve to open, and control the hydraulic pump to stop.

[0054] A maglev train includes the hydraulic system for maglev train rescue described in any one of the above.

[0055] In this application, when the reversing valve is in the first working position, its oil inlet P3 is communicated with the working oil port B, and the oil return port T3 is communicated with the working oil port A;

[0056] When the directional control valve is in the second working position, its oil inlet P3 is connected to the working oil port A, the oil return port T3 is connected to the working oil port B, and both the oil inlet P3 and the oil return port T3 are connected to the inner cavity of the oil tank;

[0057] The oil inlet P1 of the balance valve in the rodless cavity circuit and the pilot oil port X2 of the balance valve in the rod cavity circuit are both connected to the working oil port A of the directional control valve, and the oil outlet T1 of the balance valve in the rodless cavity circuit is connected to the rodless cavity of the hydraulic cylinder;

[0058] The oil inlet P2 of the balance valve in the rod cavity circuit and the pilot oil port X1 of the balance valve in the rodless cavity circuit are both connected to the working oil port B of the directional control valve, and the oil outlet T2 of the balance valve in the rod cavity circuit is connected to the rod cavity of the hydraulic cylinder;

[0059] The state locking valve 21 is arranged between the oil outlet T2 and the hydraulic cylinder to control the on-off of the oil circuit where it is located.

[0060] During use, after opening the state locking valve and then controlling the directional control valve to be in the first working position and starting the hydraulic pump, the hydraulic oil can flow into the rodless cavity of the hydraulic cylinder through the directional control valve and the balance valve in the rodless cavity circuit in sequence, then the piston rod can be pushed to retract. Then, by connecting a rescue wheel to the outer end of the piston rod, the rescue wheel can be pulled to make it descend to support the vehicle body. Then, this hydraulic system can enter the rescue state.

[0061] When controlling the directional control valve to be in the second working position and starting the hydraulic pump, the hydraulic oil can flow into the rod cavity of the hydraulic cylinder through the directional control valve and the balance valve in the rod cavity circuit in sequence, then the piston rod can be pushed to extend, and then the rescue wheel can be pushed to make it rise, and then the vehicle body can descend and be supported by the common wheels arranged at its bottom. Then, this hydraulic system can cancel the rescue state.

[0062] The hydraulic system for maglev train rescue can control the hydraulic equipment for maglev train rescue to transition between the rescue state and the non-rescue state. The beneficial effect is that since a state locking valve is provided, the state locking valve can be a switching valve or a stop valve, etc., as long as it can control the on / off of the pipeline. Then, in the non-rescue state, when the vehicle is running normally, the state locking valve is kept in the closed state, and the hydraulic oil on the rod chamber side of the hydraulic cylinder is locked. That is, when the rescue wheel is disengaged from the mechanical locking state due to abnormal force, the piston rod can be prevented from retracting, effectively preventing the rescue wheel from falling. And since a rodless chamber circuit balance valve is provided, in the non-rescue state, when the vehicle is running normally, the rodless chamber circuit balance valve is kept in the closed state, and the hydraulic oil on the rodless chamber side of the hydraulic cylinder is locked. Then, when the rescue wheel is disengaged from the mechanical locking state due to abnormal force, the oil pressure in the rodless chamber of the hydraulic cylinder rapidly increases with the movement of the piston rod to prevent the piston rod from retracting. That is, the rodless chamber circuit balance valve can act as a safety valve to prevent the rescue wheel from falling. In summary, the hydraulic system for maglev train rescue has a hydraulic oil locking function, can prevent the rescue device from falling during the train's running, and has a high ability to maintain the non-rescue state. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0064] Figure 1 Schematic diagram of the hydraulic principle of the specific embodiment provided by the present application;

[0065] Figure 2 Schematic diagram of the assembly of the hydraulic equipment of the specific embodiment provided by the present application;

[0066] Figure 3 Schematic diagram of the layout of the hydraulic equipment of the specific embodiment provided by the present application;

[0067] Figure 4 Schematic diagram of the pipeline layout of the specific embodiment provided by the present application;

[0068] Figure 5 Schematic diagram of the structure of the rescue device of the specific embodiment provided by the present application.

[0069] Reference Signs:

[0070] 1 - Fuel tank; 2 - Safety valve; 3 - Hydraulic pump; 4 - Motor; 5 - Filter; 6 - Check valve; 7 - Directional control valve; 8 - Rodless cavity circuit balance valve; 9 - Rod cavity circuit balance valve; 10 - Rodless cavity unloading valve; 11 - Rod cavity unloading valve; 12 - Rodless cavity pressure sensor; 13 - Rod cavity pressure sensor; 14 - Rodless cavity quick connector II; 15 - Rod cavity quick connector II; 16 - Rodless cavity quick connector I; 17 - Rod cavity quick connector I; 18 - Rodless cavity test point II; 19 - Rod cavity test point II; 20 - Status locking valve; 21 - Rodless cavity distribution main pipeline; 22 - Rodless cavity distribution branch pipeline; 23 - Rod cavity distribution main pipeline; 24 - Rod cavity distribution branch pipeline; 25 - Hydraulic system grouping; 251 - Multi - way joint; 252 - Rodless cavity rescue pipeline; 253 - Rod cavity rescue pipeline; 254 - Hydraulic cylinder; 255 - Rod cavity test point I; 256 - Rodless cavity test point I; 26 - Rescue wheel; 27 - Pipeline support II; 28 - Pipeline support I; 29 - Cross beam II; 30 - Cross beam I; 31 - Suspension frame body; 32 - Equipment installation frame; 321 - Installation frame body; 322 - Rail beam; 323 - L - shaped connection frame; 33 - Equipment box; 34 - Handle; 35 - Liquid level gauge; 36 - Oil filling port; 37 - Oil drain port. Detailed implementation manners

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0072] To cope with emergencies, rail vehicles are usually equipped with rescue devices. Please refer to Figure 5 , the rescue device includes a base, a rescue wheel 26, a hydraulic cylinder 254 and a mechanical locking structure. The rescue wheel 26 is rotatably connected to the piston rod of the hydraulic cylinder 254. When the piston rod of the hydraulic cylinder 254 extends, the rescue wheel 26 is lifted, so that the vehicle drops to cancel the rescue. On the contrary, when the piston rod of the hydraulic cylinder 254 retracts, the rescue wheel 26 is lowered, so that the vehicle is lifted to achieve rescue. The rescue wheel 26 is connected to the base through a mechanical locking structure, and the rescue wheel 26 can be locked after being lifted through the mechanical locking structure.

[0073] The core of this application is to provide a hydraulic system for maglev train rescue. Using this hydraulic system to drive the rescue device can prevent the rescue device from falling during the train's operation. Another core of this application is to provide a hydraulic device including the above-mentioned hydraulic system for maglev train rescue. Another core of this application is to provide a control method applied to the above-mentioned hydraulic system for maglev train rescue. Another core of this application is to provide a maglev train including the above-mentioned hydraulic system for maglev train rescue.

[0074] This application provides a hydraulic system for maglev train rescue, including: an oil tank 1, a hydraulic pump 3, a hydraulic cylinder 254, a directional control valve 7, a rod chamber circuit balance valve 9, a non-rod chamber circuit balance valve 8, and a state locking valve 20; wherein, the non-rod chamber circuit balance valve 8 includes an oil inlet P1, an oil outlet T1, and a pilot oil port X1;

[0075] The rod chamber circuit balance valve 9 includes an oil inlet P2, an oil outlet T2, and a pilot oil port X2;

[0076] The directional control valve 7 includes an oil inlet P3, an oil return port T3, a working oil port A, and a working oil port B. When the directional control valve 7 is in the first working position, the oil inlet P3 is connected to the working oil port B, and the oil return port T3 is connected to the working oil port A. When the directional control valve 7 is in the second working position, the oil inlet P3 is connected to the working oil port A, and the oil return port T3 is connected to the working oil port B;

[0077] Both the oil inlet P3 and the oil return port T3 are connected to the inner cavity of the oil tank 1;

[0078] The working oil port A is connected to the oil inlet P1 and the pilot oil port X2, and the oil outlet T1 is connected to the non-rod chamber of the hydraulic cylinder 254;

[0079] The working oil port B is connected to the oil inlet P2 and the pilot oil port X1, and the oil outlet T2 is connected to the rod chamber of the hydraulic cylinder 254;

[0080] The state locking valve 2021 is arranged between the oil outlet T2 and the hydraulic cylinder 254 to control the on-off of the oil circuit where it is located.

[0081] After opening the state locking valve 20 and then controlling the directional control valve 7 to be in the first working position and starting the hydraulic pump 3, the hydraulic oil can flow through the directional control valve 7 and the non-rod chamber circuit balance valve 8 into the non-rod chamber of the hydraulic cylinder 254 in sequence, which can push the piston rod to retract. Then, connecting a rescue wheel 26 to the outer end of the piston rod can pull the rescue wheel 26 to make it descend to support the vehicle body. Then, this hydraulic system can enter the rescue state.

[0082] When the control reversing valve 7 is in the second working position and the hydraulic pump 3 is started, the hydraulic oil can sequentially pass through the reversing valve 7 and the rod chamber circuit balance valve 9 and flow into the rod chamber of the hydraulic cylinder 254, so as to push the piston rod to extend, and then the rescue wheel 26 can be pushed to rise, and the vehicle body can descend. Supported by the common wheels arranged at the bottom, the hydraulic system can cancel the rescue state.

[0083] The beneficial effects are as follows: through the hydraulic system for maglev train rescue, the hydraulic equipment for maglev train rescue can be controlled to switch between the rescue state and the non-rescue state; furthermore, since the state locking valve 20 is provided, the state locking valve 20 can be a switching valve or a stop valve, etc., as long as it can control the on-off of the pipeline. Then, in the non-rescue state, when the vehicle is running normally, the state locking valve 20 is kept in the closed state, and the hydraulic oil on the rod chamber side of the hydraulic cylinder 254 is locked. That is, when the rescue wheel 26 is separated from the mechanical locking state due to abnormal force, the piston rod can be prevented from retracting, effectively preventing the rescue wheel 26 from falling. And since the rodless chamber circuit balance valve 8 is provided, in the non-rescue state, when the vehicle is running normally, the rodless chamber circuit balance valve 8 is kept in the closed state, and the hydraulic oil on the rodless chamber side of the hydraulic cylinder 254 is locked. Then, when the rescue wheel 26 is separated from the mechanical locking state due to abnormal force, the oil pressure in the rodless chamber of the hydraulic cylinder 254 rises rapidly with the movement of the piston rod, so as to prevent the piston rod from retracting. That is, the rodless chamber circuit balance valve 8 can act as a safety valve 2 to prevent the rescue wheel 26 from falling. In summary, the hydraulic system for maglev train rescue has a hydraulic oil locking function and a high ability to maintain the non-rescue state; secondly, since the rodless chamber circuit balance valve 8 and the rod chamber circuit balance valve 9 are provided, it can avoid the damage to the hydraulic system for maglev train rescue that may be caused by the sudden change of the force on the hydraulic cylinder 254, and can avoid the sudden increase in the falling speed of the vehicle, so as to reduce the damage to the hydraulic system for maglev train rescue and the vehicle body.

[0084] On the basis of the above embodiment, a rod chamber pressure sensor 13 is provided on one side of the oil outlet T2;

[0085] The hydraulic system for maglev train rescue further includes a controller. The controller is signal-connected to the rod chamber pressure sensor 13, the reversing valve 7 and the hydraulic pump 3, and is used to receive the detection result of the rod chamber pressure sensor 13 and control the actions of the reversing valve 7 and the hydraulic pump 3.

[0086] Reference Figure 1 As described, the rod chamber pressure sensor 13 is arranged at the oil outlet T2 of the rod chamber circuit balance valve 9. Correspondingly, the hydraulic system for maglev train rescue is also equipped with a controller. The reversing valve 7, the hydraulic pump 3 and the rod chamber pressure sensor 13 are all signal-connected to the controller, and are used to receive the detection result of the rod chamber pressure sensor 13 and control the actions of the reversing valve 7 and the hydraulic pump 3.

[0087] In use, in some specific embodiments, the controller is used to control the reversing valve 7 to be in the second working position and control the hydraulic pump 3 to start, so as to switch to the non-rescue state, that is, to control the piston rod of the hydraulic cylinder 254 to extend; alternatively, the controller is also used to control the reversing valve 7 to be in the first working position and control the hydraulic pump 3 to start, so as to switch to the non-rescue state, effectively improving the degree of automation.

[0088] Furthermore, in some specific embodiments, the controller is also used to control the reversing valve 7 to remain in the first working position according to the detection result of the rod chamber pressure sensor 13 and control the start and stop of the hydraulic pump 3, so that continuous rescue work can be achieved in the rescue state, avoiding the unlocking of the hydraulic equipment for maglev train rescue under external force in the rescue state, that is, avoiding the unlocking of the piston rod of the hydraulic cylinder 254 from extending, so that the rescue wheel 26 remains in contact with the track.

[0089] On the basis of the above embodiments, a rod chamber unloading valve 11 is provided between the oil outlet T2 and the oil tank 1, a rodless chamber unloading valve 10 is provided between the oil outlet T1 and the oil tank 1, and when the reversing valve 7 is in the third working position, the oil inlet P3, the oil return port T3, the working oil port A and the working oil port B are independent of each other;

[0090] A rodless chamber pressure sensor 12 is provided on one side of the oil outlet T1, and the controller is signal-connected to the rodless chamber pressure sensor 12, the rod chamber unloading valve 11 and the rodless chamber unloading valve 10, and is used to receive the detection result of the rodless chamber pressure sensor 12 and control the actions of the rod chamber unloading valve 11 and the rodless chamber unloading valve 10.

[0091] Reference Figure 1It should be noted that the reversing valve 7 is a three-position four-way reversing valve 7. When the reversing valve 7 is in the third working position, the hydraulic oil in the hydraulic cylinder 254 cannot return to the oil tank 1 through the reversing valve 7. Since the rod chamber unloading valve 11 is arranged at the oil outlet T2 of the rod chamber circuit balance valve 9, and the rodless chamber unloading valve 10 is arranged at the oil outlet T1 of the rodless chamber circuit balance valve 8, the hydraulic oil can return to the oil tank 1 through the rod chamber unloading valve 11 or the rodless chamber unloading valve 10. Correspondingly, the rodless chamber pressure sensor 12 is arranged at the oil outlet T1 of the rodless chamber circuit balance valve 8, so that the rodless chamber pressure of the hydraulic cylinder 254 can be detected. The controller is also signal-connected to the rodless chamber pressure sensor 12, the rod chamber unloading valve 11 and the rodless chamber unloading valve 10, so as to be able to receive the detection result of the rodless chamber pressure sensor 12 and control the actions of the rod chamber unloading valve 11 and the rodless chamber unloading valve 10. Optionally, in some specific embodiments, the controller is used to control the opening of the rod chamber unloading valve 11 and the rodless chamber unloading valve 10 according to the detection result of the rodless chamber pressure sensor 12, and control the reversing valve 7 to be adjusted to the third working position, so as to ensure that the hydraulic oil in the rod chamber of the hydraulic cylinder 254 can smoothly return to the oil tank 1, improve the use safety of the hydraulic system for maglev train rescue, and ensure that the vehicle body will not fall as a whole due to the change of the load on the hydraulic cylinder 254, causing impact, and avoid damage to the hydraulic rescue power unit and the vehicle body.

[0092] On the basis of the above embodiments, the hydraulic system for maglev train rescue includes several groups of hydraulic system groups 25. One hydraulic system group 25 includes a multi-way joint 251, several rodless chamber rescue pipelines 252, several rod chamber rescue pipelines 253 and several hydraulic cylinders 254;

[0093] The multi-way joint 251 has independent rodless chamber distribution channels and rod chamber distribution channels. In one hydraulic group, several rodless chamber rescue pipelines 252 are connected to the rodless chambers of the corresponding hydraulic cylinders 254 in the same hydraulic system group 25, and several rod chamber rescue pipelines 253 are connected to the rod chambers of the corresponding hydraulic cylinders 254 in the same hydraulic system group 25;

[0094] The oil outlet T1 is connected to the rodless chamber distribution pipeline, and several rodless chamber quick plugs 16 are arranged on the rodless chamber distribution pipeline. The oil outlet T2 is connected to the rod chamber distribution pipeline, and several rod chamber quick plugs 17 are arranged on the rod chamber distribution pipeline. The numbers of the rodless chamber quick plugs 16 and the rod chamber quick plugs 17 are equal to the number of the hydraulic system groups 25;

[0095] Several rodless chamber rescue pipelines 252 are connected to the corresponding interfaces of the rodless chamber distribution channel, and several rodless chamber quick plugs 16 can be connected or disconnected from the corresponding interfaces of the rodless chamber distribution channel;

[0096] A number of rod-end rescue pipelines 253 are connected to the corresponding interfaces of the rod-end distribution channel, and a number of rod-end quick plugs I 17 can be connected or disconnected from the corresponding interfaces of the rod-end distribution channel.

[0097] Reference Figure 1 As described with reference to Figure 1 , the hydraulic system for maglev train rescue equipped for the entire railway vehicle is equipped with N hydraulic cylinders 254. The piston rod of each hydraulic cylinder 254 is correspondingly connected to its own rescue wheel 26, that is, the number of rescue wheels is equal to the number of hydraulic cylinders 254 equipped in the hydraulic system for maglev train rescue. In this hydraulic system for maglev train rescue, a number of hydraulic cylinders 254 are evenly distributed into M hydraulic system groups 25. Preferably, N is a multiple of 4, so that at least 4 hydraulic cylinders 254 can be distributed in each hydraulic system group 25. Then, by arranging the M hydraulic system groups 25 on the corresponding suspension brackets of the railway vehicle, each carriage of the railway vehicle can be stably supported.

[0098] And each hydraulic system group 25 further includes a multi-way joint 251, a number of rodless-end rescue pipelines 252, and a number of rod-end rescue pipelines 253. Reference Figure 1 As described with reference to Figure 1 , the hydraulic system for maglev train rescue is equipped with a group of rodless-end distribution pipelines and a group of rod-end distribution pipelines. To cooperate with several groups of hydraulic system groups 25, one interface of the rodless-end distribution pipeline is connected to the oil outlet T1, and the remaining interfaces, the number of which is equal to the number of hydraulic system groups 25, are all connected to rodless-end quick plugs I 16. Similarly, one interface of the rod-end distribution pipeline is connected to the oil outlet T2, and the remaining interfaces, the number of which is equal to the number of hydraulic system groups 25, are all connected to rod-end quick plugs I 17.

[0099] Cooperated, each hydraulic system group 25 is also equipped with its own multi-way joint 251, a number of rodless cavity rescue pipelines 252, and a number of rod cavity rescue pipelines 253. The multi-way joint 251 is internally provided with a rodless cavity distribution channel and a rod cavity distribution channel. The number of interfaces of the rodless cavity distribution channel is one more than the number of rodless cavity rescue pipelines 252 in the hydraulic system group 25 where it is located. One interface of the rodless cavity distribution channel can be connected or disconnected from the corresponding rodless cavity quick plug 16, and the remaining interfaces, the number of which is equal to the number of interfaces of the hydraulic cylinders 254 in the hydraulic system group 25 where it is located, are respectively connected to the rodless cavities of the corresponding hydraulic cylinders 254 through the corresponding rodless cavity rescue pipelines 252. Similarly, the number of interfaces of the rod cavity distribution channel is one more than the number of rod cavity rescue pipelines 253 in the hydraulic system group 25 where it is located. One interface of the rod cavity distribution channel can be connected or disconnected from the corresponding rod cavity quick plug 17, and the remaining interfaces, the number of which is equal to the number of interfaces of the hydraulic cylinders 254 in the hydraulic system group 25 where it is located, are respectively connected to the rod cavities of the corresponding hydraulic cylinders 254 through the corresponding rod cavity rescue pipelines 253. The layout of the hydraulic system for maglev train rescue is reasonable, the structure is simple, it is convenient to be arranged on the suspension frame of the rail vehicle, and the connection and maintenance during assembly are relatively convenient.

[0100] For example, in some specific embodiments, N is equal to 32, M is equal to 8, the number of interfaces of the rodless cavity distribution channel is 5, 1 is connected to the corresponding port of the rodless cavity distribution pipeline, and the remaining 4 interfaces are connected to the corresponding rodless cavity rescue pipelines 252. Similarly, the number of interfaces of the rodless cavity distribution channel is 5, 1 is connected to the corresponding port of the rodless cavity distribution pipeline, and the remaining 4 interfaces are connected to the corresponding rodless cavity rescue pipelines 252.

[0101] On the basis of the above embodiments, the rodless cavity distribution pipeline includes a rodless cavity distribution main pipeline 21 and a number of rodless cavity distribution branch pipelines 22. The first end of the rodless cavity distribution main pipeline 21 is provided with a rodless cavity quick plug 14, and the rodless cavity quick plug 14 can be connected or disconnected from the rodless cavity loop balance valve 8. The first ends of the number of rodless cavity distribution branch pipelines 22 are all connected to the second end of the rodless cavity distribution main pipeline 21, and the second ends of the number of rodless cavity distribution branch pipelines 22 are provided with rodless cavity quick plugs 16;

[0102] The rod cavity distribution pipeline includes a rod cavity distribution main pipeline 23 and a number of rod cavity distribution branch pipelines 24. The first end of the rod cavity distribution main pipeline 23 is provided with a rod cavity quick plug 15, and the rod cavity quick plug 15 can be connected or disconnected from the rod cavity loop balance valve 9. The first ends of the number of rod cavity distribution branch pipelines 24 are all connected to the second end of the rod cavity distribution main pipeline 23, and the second ends of the number of rod cavity distribution branch pipelines 24 are provided with rod cavity quick plugs 17;

[0103] The state locking valve 20 is provided on the rod chamber distribution main pipeline 23.

[0104] Reference Figure 1 As described with reference to the figure, in the rodless chamber distribution pipeline, one end of the rodless chamber distribution main pipeline 21 is provided with a rodless chamber quick plug II 14 to be connectable or disconnectable from the oil outlet T1, and the other end is connected to one of several rodless chamber distribution branch pipelines 22 or the intersection position of several rodless chamber distribution branch pipelines 22, etc., and one ends of several pipelines extend towards and are connected to the rodless chamber distribution main pipeline 21, and the other ends are connected to the rodless chamber quick plug I 16. Similarly, in the rod chamber distribution pipeline, one end of the rod chamber distribution main pipeline 23 is provided with a rod chamber quick plug II 15 to be connectable or disconnectable from the oil outlet T2, and the other end is connected to one of several rod chamber distribution branch pipelines 24 or the intersection position of several rod chamber distribution branch pipelines 24, etc., and one ends of several pipelines extend towards and are connected to the rod chamber distribution main pipeline 23, and the other ends are connected to the rod chamber quick plug I 17. With such a setting, the layout of the hydraulic system for the rescue of the maglev train is further optimized, the structure is simplified, the difficulty of setting on the suspension frame of the rail vehicle is further reduced, and the connection and maintenance during assembly are more convenient.

[0105] It should be noted that the setting method of the state locking valve 20 is not limited to the above example types, as long as the rod chamber of the hydraulic cylinder 254 can be closed. For example, state locking valves 20 are provided on each rod chamber distribution branch pipeline 24.

[0106] Of course, the types of the rodless chamber distribution pipeline and the rod chamber distribution pipeline are not limited to the above example types, as long as the above connection requirements can be achieved. For example, the main structure is a straight pipeline. Except for the interfaces at both ends of the main structure, several openings are provided as interfaces at the middle position of the length of the main structure, and the state locking valve 20 is connected at the interface of the rod chamber distribution pipeline for connecting to the oil outlet T2.

[0107] On the basis of the above embodiment, the detection oil port of the rod chamber distribution channel is connected to the rod chamber test point I 255, and the detection oil port of the rodless chamber distribution channel is connected to the rodless chamber test point I 256;

[0108] The rod chamber distribution main pipeline 23 is provided with a rod chamber test point II 19, and the rodless chamber distribution main pipeline 21 is provided with a rodless chamber test point II 18.

[0109] Reference Figure 1It should be noted that the rod-side cavity distribution channel also has a detection oil port, and a pressure sensor is connected to the detection oil port of the rod-side cavity distribution channel to serve as the first rod-side cavity test point 255. Similarly, the non-rod-side cavity distribution channel also has a detection oil port, and a pressure sensor is connected to the detection oil port of the non-rod-side cavity distribution channel to serve as the first non-rod-side cavity test point 256. With such a setting, while pressure detection can be achieved, the pipeline layout space can be saved.

[0110] A pressure sensor is connected to the main pipeline 23 of the rod-side cavity distribution to serve as the second rod-side cavity test point 19. Similarly, a pressure sensor is connected to the main pipeline 21 of the non-rod-side cavity distribution to serve as the second non-rod-side cavity test point 18, so as to improve the accuracy of pressure detection.

[0111] Furthermore, the hydraulic system for maglev train rescue further includes a safety valve 2, a filter 5, and a check valve 6. A safety valve 2, a filter 5, and a check valve 6 are arranged in the pipeline between the oil inlet P3 of the reversing valve 7 and the fuel tank 1. The safety valve 2 is connected in parallel with the hydraulic pump 3 and is connected to the inlet of the filter 5, and a check valve 6 is arranged between the outlet of the filter 5 and the oil inlet P3.

[0112] On the basis of the above embodiment, the pipe section of the main pipeline 23 of the rod-side cavity distribution where the state locking valve 20 is installed extends into the carriage interior, so that the operator can operate the state locking valve 20 inside the vehicle to open or close it.

[0113] In addition to the above hydraulic system for maglev train rescue, the present application also provides a maglev train rescue hydraulic device including the hydraulic system for maglev train rescue disclosed in the above embodiment. In this maglev train rescue hydraulic device, the vehicle body suspension frame includes a suspension frame body 31, an equipment installation frame 32, and an equipment box 33; the fuel tank 1, the hydraulic pump 3, the reversing valve 7, the rod-side cavity circuit balance valve 9, the non-rod-side cavity circuit balance valve 8, the non-rod-side cavity pressure sensor 12, and the rod-side cavity pressure sensor 13 are all arranged in the inner cavity of the equipment box 33; the equipment installation frame 32 is fixed to the bottom of the suspension frame body 31, the equipment installation frame 32 has a receiving space, and the equipment box 33 is slidably inserted into the receiving space.

[0114] Reference Figure 1 It should be noted that the fuel tank 1, the hydraulic pump 3, the reversing valve 7, the rod-side cavity circuit balance valve 9, the non-rod-side cavity circuit balance valve 8, the non-rod-side cavity pressure sensor 12, and the rod-side cavity pressure sensor 13 are all arranged in the inner cavity of the equipment box 33, and the pipeline connected to the oil outlet T2 of the rod-side cavity circuit balance valve 9 passes through the box wall of the equipment box 33 and is connected to the second non-rod-side cavity quick plug 14. Similarly, the pipeline connected to the oil outlet T2 of the rod-side cavity circuit balance valve 9 passes through the box wall of the equipment box 33 and is connected to the second rod-side cavity quick plug 15.

[0115] Moreover, the hydraulic pump 3 includes a pump body and a motor 4, and the controller is signal-connected to the motor 4 to control the start or stop of the hydraulic pump 3.

[0116] For illustration, please refer to Figure 2 , to realize the installation of the equipment box 33, two opposite equipment installation frames 32 are fixedly connected to the bottom of the suspension frame body 31 along its own length direction. There is an accommodating space between the two equipment installation frames 32, and guiding structures, such as slide rails or chutes, etc., are provided on the opposite sides of the two equipment installation frames 32. The guiding structures extend along the width direction of the suspension frame body 31 so as to be able to pull the equipment box 33 out of the vehicle body or push it back to the bottom of the vehicle body, which is beneficial to reducing the maintenance difficulty.

[0117] On the basis of the above embodiments, the equipment box 33 is provided with a handle 34, a liquid level gauge 35, an oil filling port 36 and an oil discharge port 37;

[0118] Both the handle 34 and the liquid level gauge 35 are arranged on the panel of the equipment box 33, and the handle 34 is used as a fulcrum to drive the sliding of the equipment box 33, and the liquid level gauge 35 is used to display the liquid level in the fuel tank 1;

[0119] One ends of the oil filling port 36 and the oil discharge port 37 are both communicated with the inner cavity of the fuel tank 1, and the other ends extend out of the outside of the equipment box 33. The oil filling port 36 is used to connect the inlet pipe to inject oil into the fuel tank 1, and the oil discharge port 37 is used to connect the outlet pipe to discharge the oil in the fuel tank 1.

[0120] Refer to Figure 2 For illustration, the handle 34 is installed on the front panel of the equipment box 33 to facilitate pushing and pulling the equipment box 33; and the liquid level gauge 35 is also installed on the front panel of the equipment box 33 to facilitate observing the liquid level in the fuel tank 1; two ports of the liquid level gauge 35 are respectively connected to the oil filling port 36 and the oil discharge port 37 to indirectly communicate with the inner cavity of the fuel tank 1 through the liquid level gauge 35. Or, the oil filling port 36 and the oil discharge port 37 are installed on the box wall of the equipment box 33, and both the oil filling port 36 and the oil discharge port 37 extend into the inner cavity of the fuel tank 1, etc., and the inlet end of the oil filling port 36 and the outlet end of the oil discharge port 37 both extend out of the outside of the equipment box 33. Oil filling and oil discharging can be respectively realized through the oil filling port 36 and the oil discharge port 37.

[0121] Furthermore, refer to Figure 2As described, the mounting frame includes a mounting frame body 321, a track beam 322, and an L-shaped connecting frame 323. Among them, the top cross beam of the mounting frame body 321 is connected to the suspension frame body 31, and the bottom vertical beam extends vertically. And a track beam 322 is arranged on the inner side of the vertical beam. Preferably, the track beam 322 is a box-shaped beam. The top horizontal plate of the L-shaped connecting frame 323 overlaps and is fixedly connected to the top of the track beam 322. The bottom vertical plate of the L-shaped connecting frame 323 extends vertically, and the above-mentioned guiding structure is arranged inside the L-shaped connecting frame 323.

[0122] Based on the above embodiments, the suspension frame body 31 includes a first cross beam 30 and a second cross beam 29 that extend along its own width direction. A number of suspension frame bodies 31 are provided with corresponding hydraulic system groups 25.

[0123] The multi-way joint 251 is arranged at the middle position of the length of the first cross beam 30. And a number of pipe supports one 28 are arranged on the first cross beam 30. A number of pipe joints one are arranged along the length direction of the first cross beam 30, and a number of pipe joints one are symmetrically distributed on both sides of the multi-way joint 251. A pipe support two 27 is arranged at the middle position of the length of the second cross beam 29.

[0124] One hydraulic system group 25 includes four hydraulic cylinders 254, four rodless cavity rescue pipelines 252, four rod cavity rescue pipelines 253, one rodless cavity distribution branch pipeline 22, and one rod cavity distribution branch pipeline 24.

[0125] And two hydraulic cylinders 254 in one hydraulic system group 25 are located on one side of the suspension frame body 31 along its own width direction, and the other two hydraulic cylinders 254 are located on the other side of the suspension frame body 31 along its own width direction.

[0126] Two rodless cavity rescue pipelines 252 and two rod cavity rescue pipelines 253 in one hydraulic system group 25 pass through and are fixed to the pipe support one 28 on the first side of the multi-way joint 251, and the other two rodless cavity rescue pipelines 252 and the other two rod cavity rescue pipelines 253 pass through and are fixed to the pipe support one 28 on the second side of the multi-way joint 251.

[0127] The rodless cavity distribution branch pipeline 22 and the rod cavity distribution branch pipeline 24 in one hydraulic system group 25 both pass through and are fixed to the pipe support two 27.

[0128] Refer to Figure 3 and Figure 4 As described, both the first cross beam 30 and the second cross beam 29 extend along the width direction of the suspension frame body 31, and are arranged on both sides of the suspension frame body 31 along its own width direction Figure 5The rescue device shown, for the convenience of installation and layout, a multi-way joint 251 is installed at the middle position of the length of the cross beam one 30 of a suspension frame body 31, and a pipeline support two 27 is installed at the middle position of the length of the cross beam two 29 of the same suspension frame body 31.

[0129] The two bottom interfaces of the multi-way joint 251 are respectively connected to one ends of a rodless cavity distribution main pipeline 21 and a rod cavity distribution main pipeline 23. The rodless cavity distribution main pipeline 21 and the rod cavity distribution main pipeline 23 extend along the length direction of the suspension frame body 31, and the other ends thereof extend towards and pass through the pipeline support two 27 to position the rodless cavity distribution main pipeline 21 and the rod cavity distribution main pipeline 23 through the pipeline support two 27.

[0130] Several interfaces on the left side of the multi-way joint 251 are connected to corresponding rodless cavity distribution branch pipelines 22 and rod cavity distribution branch pipelines 24. The left ends of the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the left side interfaces of the multi-way joint 251 extend towards the left and are connected to the rodless cavity and the rod cavity of the hydraulic cylinder 254 on the left side of the suspension frame body 31. The middle positions of the lengths of the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the left side interfaces of the multi-way joint 251 all pass through the pipeline support one 28 on the left side of the multi-way joint 251 to position the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the left side interfaces of the multi-way joint 251 through the pipeline support one 28.

[0131] Similarly, several interfaces on the right side of the multi-way joint 251 are connected to corresponding rodless cavity distribution branch pipelines 22 and rod cavity distribution branch pipelines 24. The right ends of the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the right side interfaces of the multi-way joint 251 extend towards the right and are connected to the rodless cavity and the rod cavity of the hydraulic cylinder 254 on the right side of the suspension frame body 31. The middle positions of the lengths of the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the right side interfaces of the multi-way joint 251 all pass through the pipeline support one 28 on the right side of the multi-way joint 251 to position the rodless cavity distribution branch pipelines 22 and the rod cavity distribution branch pipelines 24 connected to the right side interfaces of the multi-way joint 251 through the pipeline support one 28.

[0132] In addition to the above hydraulic system and hydraulic equipment for maglev train rescue, the present application also provides a control method applied to the hydraulic system for maglev train rescue disclosed in the above embodiments. The control method includes the following steps:

[0133] Step S1: Obtain a rescue signal, control the directional control valve 7 to be in the first working position, and control the hydraulic pump 3 to start;

[0134] It is understandable that this step is to start for the first rescue operation, provided that the status locking valve 20 is first opened. Optionally, before step S1, the status locking valve 20 is first controlled to be opened.

[0135] Specifically, after obtaining the rescue signal and controlling to perform step S1, driven by the hydraulic pump 3, the hydraulic oil enters the rod chamber of the hydraulic cylinder 254 through the directional control valve 7 and the rod chamber circuit balance valve 9, pushing the piston rod of the hydraulic cylinder 254 to retract. At the same time, the pressure at the oil inlet P2 of the rod chamber circuit balance valve 9 is used as the pilot oil pressure to control the opening of the non-rod chamber circuit balance valve 8, and the hydraulic oil in the non-rod chamber of the hydraulic cylinder 254 will return to the oil tank 1 through the non-rod chamber circuit balance valve 8 and the directional control valve 7.

[0136] Step S2: Obtain the rod chamber pressure. When the rod chamber pressure is greater than or equal to the maximum limit rescue pressure value, after delaying the rescue time, control the hydraulic pump 3 to stop;

[0137] It is understandable that this step is to end the first rescue operation. The controller starts timing. When the rod chamber pressure sensor 13 detects the pressure U 有 ≥ the maximum limit rescue pressure value m bar, after timing for the delay rescue time t seconds, then control the hydraulic pump 3 to stop operating, and at the same time control the directional control valve 7 to remain in the first working position to prepare for the subsequent steps.

[0138] Step S3: Obtain the rod chamber pressure again. When the rod chamber pressure is less than the minimum limit rescue pressure value, control the hydraulic pump 3 to start;

[0139] It is understandable that this step is to start for the second rescue operation, that is, after the first rescue operation is completed, the rod chamber pressure sensor 13 is used to continuously detect the pressure. When the rod chamber pressure sensor 13 detects the pressure U 有 < the minimum limit rescue pressure value m' bar, start the hydraulic pump 3 again to be able to input hydraulic oil into the rod chamber of the hydraulic cylinder 254. The advantage is that after the hydraulic cylinder 254 retracts to pull the rescue wheel 26 down, during the vehicle rescue driving process, due to the influence of the track friction force and impact force, the rescue wheel 26 tends to derail upward and push the piston rod of the hydraulic cylinder 254 to extend, that is, the rescue wheel 26 moves in the direction of getting out of the locked state. At this time, the oil pressure of the hydraulic oil in the rod chamber of the hydraulic cylinder 254 will decrease. Through step S2, the piston rod can be pushed to retract, and the oil pressure of the hydraulic oil in the rod chamber of the hydraulic cylinder 254 will rapidly increase with the movement of the piston rod, thereby preventing the piston rod from extending, ensuring that the rescue wheel 26 is in the locked state and will not move due to the friction force and impact force, realizing the auxiliary locking function.

[0140] Step S4: Obtain the pressure in the rod chamber. When the pressure in the rod chamber is greater than or equal to the maximum limit rescue pressure value, control the hydraulic pump 3 to stop.

[0141] It can be understood that after completing Step S3, the second rescue action is ended through this step, which is similar to Step S2.

[0142] Step S5: Loop through S3 and S4, and determine whether the rescue model exists. When the rescue signal disappears, stop the loop.

[0143] It can be understood that this step is to start a continuous working mechanism. Each loop gradually completes Step S2 and Step S3, that is, completes a continuous rescue operation from start to stop. Repeat this way until the vehicle side no longer sends a rescue signal, and then end the auxiliary locking function.

[0144] Based on the above embodiments, after Step S5, the following steps are further included:

[0145] Step S6: Obtain the cancellation rescue signal, control the directional valve 7 to be in the second working position, and control the hydraulic pump 3 to start.

[0146] It can be understood that the functions of Steps S1 - S5 are to achieve rescue. After completing the rescue, this step is to cancel the rescue so that the vehicle can drive normally. Specifically, after obtaining the cancellation of the rescue, after controlling to perform Step S5, driven by the hydraulic pump 3, the hydraulic oil passes through the directional valve 7 and the rodless chamber circuit balance valve 8 into the rodless chamber of the hydraulic cylinder 254, pushing the piston rod out to drive the rescue wheel 26 of the hydraulic cylinder 254 to rise and unlock. At the same time, the pressure at the oil inlet P1 of the rodless chamber circuit balance valve 8 is used as the pilot oil pressure to control the opening of the rod chamber circuit balance valve 9, and the hydraulic oil in the rod chamber of the hydraulic cylinder 254 returns to the fuel tank 1 through the rod chamber circuit balance valve 9 and the directional valve 7.

[0147] Step S7: Obtain the pressure in the rodless chamber. When the pressure in the rodless chamber is greater than the maximum limit pressure value, after delaying the cancellation of the rescue time, control the directional valve 7 to remain in the third working position, control the rod chamber unloading valve 11 and the rodless chamber unloading valve 10 to open, and control the hydraulic pump 3 to stop.

[0148] It can be understood that after the hydraulic cylinder 254 drives the rescue wheel 26 to rise and unlock, the downward movement of the vehicle body accelerates the piston rod of the hydraulic cylinder 254 to extend, and the piston rod changes from a positive load to a negative load. At the same time, the pressure of the hydraulic oil in the rodless chamber of the hydraulic cylinder 254 drops rapidly, and the oil pressure at the pilot oil port X2 of the rod chamber circuit balance valve 9 decreases, and the rod chamber circuit balance valve 9 closes, and the hydraulic oil in the rod chamber of the hydraulic cylinder 254 cannot return to the fuel tank 1. Then, after Step S6, the pressure is continuously detected by the rodless chamber pressure sensor 12. When the rodless chamber pressure sensor 12 detects the pressure U 无>When the maximum limit pressure value is n bar, after the timing is delayed by t' seconds to cancel the rescue time, then control the hydraulic pump 3 to stop operating. At the same time, control the directional valve 7 to remain in the third working position, control the rod chamber unloading valve 11 and the non-rod chamber unloading valve 10 to open. Then the pressure in the non-rod chamber of the hydraulic cylinder 254 will quickly rise to the preset pressure of the balance valve 9 in the rod chamber circuit. The hydraulic oil in the rod chamber of the hydraulic cylinder 254 is converted to return to the fuel tank 1 through the rod chamber balance valve and the rod chamber unloading valve 11. The advantage is that through step S7, it can ensure that the hydraulic oil in the rod chamber of the hydraulic cylinder 254 smoothly returns to the fuel tank 1, and ensure that the vehicle body will not fall as a whole due to the change of the load on the hydraulic cylinder 254, causing impact, and avoid damaging the hydraulic rescue power unit and the vehicle body.

[0149] In addition to the above-mentioned hydraulic system for maglev train rescue, the present application also provides a maglev train including the hydraulic system for maglev train rescue disclosed in the above embodiments. For the structures of other parts of this maglev train, reference may be made to the prior art and will not be elaborated herein.

[0150] It should be noted that the relational terms such as "first" and "second" described above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the orientation terms "up, down, left, right" described above are all defined based on the drawings of the specification.

[0151] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0152] The above has introduced in detail the maglev train and its hydraulic system, equipment and control method for maglev train rescue provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A hydraulic system for maglev train rescue, characterized in that, Comprising: A fuel tank (1), a hydraulic pump (3), a hydraulic cylinder (254), a directional control valve (7), a rod-end chamber circuit balance valve (9), a rodless-end chamber circuit balance valve (8), and a state locking valve (20); The rodless-end chamber circuit balance valve (8) includes an oil inlet P1, an oil outlet T1, and a pilot oil port X1; The rod-end chamber circuit balance valve (9) includes an oil inlet P2, an oil outlet T2, and a pilot oil port X2; The directional control valve (7) includes an oil inlet P3, an oil return port T3, a working oil port A, and a working oil port B. When the directional control valve (7) is in the first working position, the oil inlet P3 is communicated with the working oil port B, the oil return port T3 is communicated with the working oil port A. When the directional control valve (7) is in the second working position, the oil inlet P3 is communicated with the working oil port A, and the oil return port T3 is communicated with the working oil port B; Both the oil inlet P3 and the oil return port T3 are communicated with the inner cavity of the fuel tank (1); The working oil port A is connected to the oil inlet P1 and the pilot oil port X2, and the oil outlet T1 is connected to the rodless end chamber of the hydraulic cylinder (254); The working oil port B is connected to the oil inlet P2 and the pilot oil port X1, and the oil outlet T2 is connected to the rod end chamber of the hydraulic cylinder (254); The state locking valve (20) is provided between the oil outlet T2 and the hydraulic cylinder (254) to control the on-off of the oil circuit where it is located.

2. The hydraulic system for maglev train rescue according to claim 1, wherein, A rod-end chamber pressure sensor (13) is provided on one side of the oil outlet T2; The hydraulic system for maglev train rescue further includes a controller. The controller is signal-connected to the rod-end chamber pressure sensor (13), the directional control valve (7), and the hydraulic pump (3) to receive the detection result of the rod-end chamber pressure sensor (13) and control the actions of the directional control valve (7) and the hydraulic pump (3).

3. The hydraulic system for maglev train rescue according to claim 2, wherein A rod-end chamber unloading valve (11) is provided between the oil outlet T2 and the fuel tank (1), and a rodless-end chamber unloading valve (10) is provided between the oil outlet T1 and the fuel tank (1). When the directional control valve (7) is in the third working position, the oil inlet P3, the oil return port T3, the working oil port A, and the working oil port B are independent of each other; A rodless-end chamber pressure sensor (12) is provided on one side of the oil outlet T1, and the controller is signal-connected to the rodless-end chamber pressure sensor (12), the rod-end chamber unloading valve (11), and the rodless-end chamber unloading valve (10) to receive the detection result of the rodless-end chamber pressure sensor (12) and control the actions of the rod-end chamber unloading valve (11) and the rodless-end chamber unloading valve (10).

4. The hydraulic system for maglev train rescue according to claim 1, wherein, The state locking valve (20) is a stop valve.

5. The hydraulic system for maglev train rescue according to any one of claims 1-4, characterized in that The hydraulic system for maglev train rescue includes several groups of hydraulic system sub-assemblies (25). One hydraulic system sub-assembly (25) includes a multi-way joint (251), several rodless-end chamber rescue pipelines (252), several rod-end chamber rescue pipelines (253), and several of the hydraulic cylinders (254); The multi-way joint (251) has independent rodless cavity distribution channels and rod cavity distribution channels. In one hydraulic group, several rodless cavity rescue pipelines (252) are connected to the rodless cavities of the corresponding hydraulic cylinders (254) in the same hydraulic system group (25), and several rod cavity rescue pipelines (253) are connected to the rod cavities of the corresponding hydraulic cylinders (254) in the same hydraulic system group (25). The oil outlet T1 is connected to the rodless cavity distribution pipeline, and the rodless cavity distribution pipeline is provided with several rodless cavity quick plugs I (16). The oil outlet T2 is connected to the rod cavity distribution pipeline, and the rod cavity distribution pipeline is provided with several rod cavity quick plugs I (17). The number of the rodless cavity quick plugs I (16) and the rod cavity quick plugs I (17) is equal to the number of the hydraulic system groups (25). Several rodless cavity rescue pipelines (252) are connected to the corresponding interfaces of the rodless cavity distribution channels, and several rodless cavity quick plugs I (16) can be connected or disconnected from the corresponding interfaces of the rodless cavity distribution channels. Several rod cavity rescue pipelines (253) are connected to the corresponding interfaces of the rod cavity distribution channels, and several rod cavity quick plugs I (17) can be connected or disconnected from the corresponding interfaces of the rod cavity distribution channels.

6. The hydraulic system for maglev train rescue according to claim 5, characterized in that, The rodless cavity distribution pipeline includes a rodless cavity distribution main pipeline (21) and several rodless cavity distribution branch pipelines (22). The first end of the rodless cavity distribution main pipeline (21) is provided with a rodless cavity quick plug II (14), and the rodless cavity quick plug II (14) can be connected or disconnected from the rodless cavity circuit balance valve (8). The first ends of several rodless cavity distribution branch pipelines (22) are all connected to the second end of the rodless cavity distribution main pipeline (21), and the second ends of several rodless cavity distribution branch pipelines (22) are provided with the rodless cavity quick plugs I (16). The rod cavity distribution pipeline includes a rod cavity distribution main pipeline (23) and several rod cavity distribution branch pipelines (24). The first end of the rod cavity distribution main pipeline (23) is provided with a rod cavity quick plug II (15), and the rod cavity quick plug II (15) can be connected or disconnected from the rod cavity circuit balance valve (9). The first ends of several rod cavity distribution branch pipelines (24) are all connected to the second end of the rod cavity distribution main pipeline (23), and the second ends of several rod cavity distribution branch pipelines (24) are provided with the rod cavity quick plugs I (17). The state locking valve (20) is arranged on the rod cavity distribution main pipeline (23).

7. The hydraulic system for maglev train rescue according to claim 6, characterized in that, The detection oil port of the rod cavity distribution channel is connected with a rod cavity test point I (255), and the detection oil port of the rodless cavity distribution channel is connected with a rodless cavity test point I (256). The rod cavity distribution main pipeline (23) is provided with a rod cavity test point II (19), and the rodless cavity distribution main pipeline (21) is provided with a rodless cavity test point II (18).

8. A hydraulic device for maglev train rescue, including a vehicle body suspension frame, characterized in that, It further includes the hydraulic system for maglev train rescue according to any one of the above-mentioned claims 1-7; The vehicle body suspension frame includes a suspension frame body (31), an equipment installation frame (32) and an equipment box (33); The fuel tank (1), the hydraulic pump (3), the reversing valve (7), the rod chamber circuit balance valve (9), the rodless chamber circuit balance valve (8), the rodless chamber pressure sensor (12), and the rod chamber pressure sensor (13) are all arranged in the inner cavity of the equipment box (33); The equipment installation frame (32) is fixed to the bottom of the suspension frame body (31). The equipment installation frame (32) has a receiving space, and the equipment box (33) is slidably inserted into the receiving space.

9. The hydraulic equipment for maglev train rescue according to claim 8, characterized in that, The equipment box (33) is provided with a handle (34), a liquid level gauge (35), an oil filling port (36) and an oil drain port (37); The handle (34) and the liquid level gauge (35) are both arranged on the panel of the equipment box (33), and the handle (34) is used as a fulcrum to drive the sliding of the equipment box (33), and the liquid level gauge (35) is used to display the liquid level in the fuel tank (1); One end of the oil filling port (36) and the oil drain port (37) is communicated with the inner cavity of the fuel tank (1), and the other end extends to the outside of the equipment box (33). The oil filling port (36) is used to connect an oil inlet pipe to inject oil into the fuel tank (1), and the oil drain port (37) is used to connect an oil outlet pipe to drain the oil in the fuel tank (1).

10. The hydraulic equipment for maglev train rescue according to claim 8, characterized in that, The suspension frame body (31) includes a cross beam one (30) and a cross beam two (29) extending along its own width direction, and a corresponding hydraulic system group (25) is provided on several of the suspension frame bodies (31); The multi-way joint (251) is arranged at the middle position of the length of the cross beam one (30), and several pipe supports one (28) are arranged on the cross beam one (30). Several of the pipe joints one are arranged along the length direction of the cross beam one (30), and several of the pipe joints one are symmetrically distributed on both sides of the multi-way joint (251). A pipe support two (27) is arranged at the middle position of the length of the cross beam two (29); One hydraulic system group (25) includes four hydraulic cylinders (254), four rodless chamber rescue pipelines (252), four rod chamber rescue pipelines (253), one rodless chamber distribution branch pipeline (22) and one rod chamber distribution branch pipeline (24); And two of the hydraulic cylinders (254) in one hydraulic system group (25) are located on one side of the suspension frame body (31) along its own width direction, and the other two hydraulic cylinders (254) are located on the other side of the suspension frame body (31) along its own width direction; Two of the rodless cavity rescue pipelines (252) and two of the rod cavity rescue pipelines (253) in a hydraulic system group (25) pass through and are fixed to the pipeline support one (28) on the first side of the multi-way joint (251). Another two rodless cavity rescue pipelines (252) and another two rod cavity rescue pipelines (253) pass through and are fixed to the pipeline support one (28) on the second side of the multi-way joint (251). The rodless cavity distribution branch pipeline (22) and the rod cavity distribution branch pipeline (24) in a hydraulic system group (25) both pass through and are fixed to the pipeline support two (27).

11. A control method for a hydraulic system used in the rescue of a maglev train, characterized in that, Applied to the hydraulic system for maglev train rescue according to any one of claims 1-6 above, the control method for maglev train rescue includes: Obtain a rescue signal, control the reversing valve (7) to be in the first working position, and control the hydraulic pump (3) to start. Obtain the rod cavity pressure. When the rod cavity pressure is greater than or equal to the maximum limit rescue pressure value, after a delay of the rescue time, control the hydraulic pump (3) to stop. Obtain the rod cavity pressure again. When the rod cavity pressure is less than the minimum limit rescue pressure value, control the hydraulic pump (3) to start. Obtain the rod cavity pressure. When the rod cavity pressure is greater than or equal to the maximum limit rescue pressure value, control the hydraulic pump (3) to stop. Loop through the S3 and the S4, and determine whether the rescue signal exists. When the rescue signal disappears, stop the loop.

12. The control method of the hydraulic system for maglev train rescue according to claim 11, characterized in that, After the S4, it further includes: Obtain a cancel rescue signal, control the reversing valve (7) to be in the second working position, and control the hydraulic pump (3) to start. Obtain the rodless cavity pressure. When the rodless cavity pressure is greater than the maximum limit pressure value, after a delay of the cancel rescue time, control the reversing valve (7) to remain in the third working position, control the rod cavity unloading valve (11) and the rodless cavity unloading valve (10) to open, and control the hydraulic pump (3) to stop.

13. A maglev train, characterized in that, Include the hydraulic system for maglev train rescue according to any one of claims 1-7 above.

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