Pantograph Pneumatic Circuit Control Device

Abstract

The present application provides a pantograph air circuit control device. The device provided by the present application includes: a first input end, a first cut-off cock, a solenoid valve, a second cut-off cock, and a first output end. The gas output by the vehicle air cylinder air source is input through the first input end, and the gas enters the air bag or air cylinder of the pantograph via the first cut-off cock, the solenoid valve, the second cut-off cock, and the first output end. When the ascending pantograph switch is triggered, the solenoid valve conducts the air circuit between the first input end and the first output end. When the descending pantograph switch is triggered, the solenoid valve conducts the air circuit between the first output end and the external environment. A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock, and the second input end is respectively connected to an air compressor and a foot pump. The device provided by the present application can achieve integrated air circuit control of the pantograph, avoid repeated setting of devices, and improve the reliability and safety of the air circuit control device.

Description

Technical Field

[0001] This application relates to mechanical control technology, and particularly to a pantograph air circuit control device. Background Art

[0002] Currently, the current collection device used in urban rail transit vehicles and main line railway locomotives is a pantograph. Among them, the raising and lowering operations of the airbag pantograph and the cylinder pantograph are realized by the raising and lowering air circuit control device of the pantograph. When the vehicle is in different working conditions, the driver or maintenance personnel input corresponding electrical signals, so that the vehicle's air source device is connected or cut off from the airbag or cylinder of the pantograph through the air circuit control device, enabling the airbag or cylinder to intake or exhaust air, and realizing the raising and lowering operations of the pantograph. However, since the vehicle's air source device is supplied with air by an on-vehicle air compressor, the input power supply of the on-vehicle air compressor is AC380V, which is obtained by inverting the DC1500V power supply of the catenary by a static inverter device. When the vehicle is stored for a long time or has just completed relevant maintenance processes, the air pressure of the vehicle's air source device may be relatively low, unable to raise the pantograph, and the static inverter device has no DC1500V input and cannot work either, forming a dead cycle.

[0003] In the prior art, in this working condition, to raise the pantograph, usually a foot pump or an electric pump is used as an emergency pantograph raising device to replace the vehicle's air source device and provide an emergency external air source excitation for the airbag or cylinder of the pantograph, so that the pantograph can be raised, enabling the static inverter device and the air compressor to work normally, and then entering the normal raising and lowering operation state.

[0004] However, the existence of the emergency pantograph raising device will result in duplicate setting of the required components, thereby reducing the reliability of the air circuit control and making the pipeline layout cumbersome and complex, increasing the possibility of air leakage. Summary of the Invention

[0005] This application provides a pantograph air circuit control device to solve the technical problems of the complex design and low reliability of the existing emergency pantograph raising device.

[0006] In a first aspect, this application provides a pantograph air circuit control device, including: a first input end, a first cut-off cock, a solenoid valve, a second cut-off cock, and a first output end;

[0007] The first input end is used to input the gas output by the vehicle air cylinder air source. The first input end is connected to the first end of the first cut-off cock. The second end of the first cut-off cock is connected to the first end of the solenoid valve. The second end of the solenoid valve is connected to the first end of the second cut-off cock. The second end of the second cut-off cock is connected to the first output end. The first output end is used to output gas for the pantograph;

[0008] The first coil of the solenoid valve is connected to the bow-raising switch; the second coil of the solenoid valve is connected to the bow-lowering switch. When the bow-raising switch is triggered, the solenoid valve is used to conduct the air path between the first input end and the first output end, and when the bow-lowering switch is triggered, the solenoid valve is used to conduct the air path between the first output end and the external environment;

[0009] A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock, and the second input end is respectively connected to an air compressor and a foot pump.

[0010] In a possible design, it further includes: a first check valve and a filter;

[0011] The first input end is connected to the first end of the first check valve, the second end of the first check valve is connected to the first end of the first cut-off cock, the second end of the first cut-off cock is connected to the first end of the filter, and the second end of the filter is connected to the first end of the solenoid valve;

[0012] Wherein, the direction in which the first check valve can conduct is from the first input end to the first end of the first cut-off cock.

[0013] In a possible design, it further includes: a start switch and a DC-AC converter;

[0014] The first end of the start switch is used to be connected to the first end of a DC power supply, the second end of the start switch is connected to the first end of the DC-AC converter, the second end of the DC-AC converter is used to be connected to the second end of the DC power supply, and the three-phase output end of the DC-AC converter is connected to the air compressor.

[0015] In a possible design, it further includes: a pressure switch;

[0016] The first end of the first contact of the pressure switch is connected to the second end of the start switch, and the second end of the first contact of the pressure switch is connected to the first end of the DC-AC converter;

[0017] The pressure detection end of the pressure switch is connected between the solenoid valve and the first end of the second cut-off cock.

[0018] In a possible design, it further includes: a forced start switch;

[0019] The first end of the forced start switch is connected to the second end of the start switch, and the second end of the forced start switch is connected to the first end of the DC-AC converter.

[0020] In a possible design, the first end of the bow-raising switch is used to connect to the first end of the DC power supply, the second end of the bow-raising switch is connected to the first end of the second contact of the pressure switch, the second end of the second contact of the pressure switch is connected to the first end of the first coil of the solenoid valve, and the second end of the first coil is used to connect to the second end of the DC power supply.

[0021] In a possible design, the first end of the bow-lowering switch is used to connect to the first end of the DC power supply, the second end of the bow-lowering switch is connected to the first end of the second coil of the solenoid valve, and the second end of the second coil is used to connect to the second end of the DC power supply.

[0022] In a possible design, it further includes: a second one-way valve;

[0023] The first end of the second one-way valve is connected to the output end of the air compressor, the second end of the second one-way valve is connected to the first end of the third shut-off cock, and the second end of the third shut-off cock is connected between the solenoid valve and the second shut-off cock;

[0024] Wherein, the direction in which the second one-way valve can conduct is from the output end of the air compressor to the first end of the third shut-off cock.

[0025] In a possible design, it further includes: a foot switch and a third one-way valve;

[0026] The foot switch is used to drive the foot pump;

[0027] The first end of the third one-way valve is connected to the output end of the foot pump, the second end of the third one-way valve is connected to the first end of the third shut-off cock, and the second end of the third shut-off cock is connected between the solenoid valve and the second shut-off cock;

[0028] Wherein, the direction in which the third one-way valve can conduct is from the output end of the foot pump to the first end of the third shut-off cock.

[0029] In a possible design, it further includes: a test output end and a pressure gauge;

[0030] Both the test output end and the pressure gauge are arranged between the second shut-off cock and the first output end.

[0031] The pantograph air circuit control device provided by this application inputs the gas output by the vehicle air cylinder air source through the first input end. The first input end is connected to the first end of the first cut-off cock. The second end of the first cut-off cock is connected to the first end of the solenoid valve. The second end of the solenoid valve is connected to the first end of the second cut-off cock. The second end of the second cut-off cock is connected to the first output end. The first output end outputs gas for the pantograph. The solenoid valve is respectively connected to the raise pantograph switch and the lower pantograph switch. When the raise pantograph switch is triggered, the solenoid valve is used to conduct the air circuit between the first input end and the first output end. When the lower pantograph switch is triggered, the solenoid valve is used to conduct the air circuit between the first output end and the external environment. A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock. The second input end is respectively connected to the air compressor and the foot pump. It realizes the integrated air circuit control of the pantograph, avoids the repeated setting of devices, improves the reliability and safety of the air circuit control device, and the high degree of concentration of the equipment reduces the occupancy rate of the vehicle interior space. Brief Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of a pantograph air circuit control device provided by an embodiment of this application;

[0033] Figure 2 It is a working principle diagram of the pantograph air circuit control device provided by an embodiment of this application;

[0034] Figure 3 It is an external view schematic diagram of the pantograph air circuit control device provided by an embodiment of this application.

[0035] Reference Signs:

[0036] 1: Vehicle air cylinder air source; 2: First input end; 3: First cut-off cock;

[0037] 4: Solenoid valve; 5: Second cut-off cock; 6: First output end;

[0038] 7: Third cut-off cock; 8: Second input end; 9: Air compressor;

[0039] 10: Foot pump; 11: First check valve; 12: Filter;

[0040] 13: Start switch; 14: DC-AC converter; 15: Pressure switch;

[0041] 16: Forced start switch; 17: Raise pantograph switch; 18: First coil of the solenoid valve;

[0042] 19: Lower pantograph switch; 20: Second coil of the solenoid valve; 21: Second check valve;

[0043] 22: Foot switch; 23: Third one-way valve; 24: Test output terminal;

[0044] 25: Pressure gauge; 26: Foot pump pedal; 27: Control connector. Detailed implementation manners

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0047] At present, the current collection device adopted by urban rail transit vehicles and main line railway locomotives is a pantograph. However, during the normal operation of the pantograph, a working condition will occur, that is, when the vehicle is stored for a long time or has just completed relevant maintenance processes, the air pressure of the vehicle's air supply device will be relatively low. In this case, the pantograph cannot be raised, and there is no DC input to the static inverter device, and the two will form a dead cycle, resulting in the inoperability of the vehicle's current collection device. In the prior art, usually a foot pump or an electric pump is used as an emergency pantograph raising device to raise the pantograph. However, the existence of the emergency pantograph raising device will cause a series of technical problems. For example, the scattered layout of the devices results in no electrical interlock between the devices, making the reliability of the air circuit control relatively low. The repeated stacking of the devices of the device makes the pipeline layout cumbersome and complex, increasing the possibility of air leakage, etc.

[0048] In view of the above problems existing in the prior art, the present application provides a pantograph air circuit control device. The gas output by the vehicle air cylinder air source is input through the first input end, and the first output end outputs gas for the pantograph. The first coil of the solenoid valve is connected to the rising pantograph switch, and the second coil of the solenoid valve is connected to the falling pantograph switch. When the rising pantograph switch is triggered, the solenoid valve is used to conduct the air circuit between the first input end and the first output end; when the falling pantograph switch is triggered, the solenoid valve is used to conduct the air circuit between the first output end and the external environment. A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock, and the second input end is respectively connected to an air compressor and a foot pump. Integrating the emergency rising pantograph device in the prior art into the original air circuit control device realizes the integrated air circuit control of the pantograph, avoids the repeated setting of devices, simplifies the pipeline layout, reduces the possibility of pipeline leakage, increases the electrical interlock, improves the reliability and safety of the air circuit control device, and the high degree of centralization of the equipment reduces the occupancy rate of the interior space of the vehicle.

[0049] The technical solution of the present application will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0050] Figure 1 FIG. is a schematic structural diagram of a pantograph air circuit control device provided by an embodiment of the present application, as Figure 1 shown, the pantograph air circuit control device provided by the embodiment of the present application includes: a first input end 2, a first cut-off cock 3, a solenoid valve 4, a second cut-off cock 5, and a first output end 6.

[0051] The first input end 2 is used to input the gas output by the vehicle air cylinder air source 1. The first input end is connected to the first end of the first cut-off cock 3. The second end of the first cut-off cock 3 is connected to the first end of the solenoid valve 4. The second end of the solenoid valve 4 is connected to the first end of the second cut-off cock 5. The second end of the second cut-off cock 5 is connected to the first output end 6. The first output end 6 is used to output gas for the pantograph;

[0052] The first coil 18 of the solenoid valve is connected to the rising pantograph switch 17, and the second coil 20 of the solenoid valve is connected to the falling pantograph switch 19. When the rising pantograph switch 17 is triggered, the solenoid valve 4 is used to conduct the air circuit between the first input end 2 and the first output end 6, and when the falling pantograph switch 19 is triggered, the solenoid valve 4 is used to conduct the air circuit between the first output end 6 and the external environment.

[0053] A second input end 8 is led out between the solenoid valve 4 and the second cut-off cock 5 through a third cut-off cock 7, and the second input end 8 is respectively connected to an air compressor 9 and a foot pump 10.

[0054] It should be noted that inFigure 1 Among them, the lines with arrows represent the air circuits, and the lines without arrows represent the electric circuits.

[0055] The first input end 2 is used to input the gas output by the vehicle air cylinder air source 1 into the pantograph air circuit control device, and the first output end 6 is used to output the gas from the pantograph air circuit control device to the pantograph. A first cut-off cock 3, a solenoid valve 4, and a second cut-off cock 5 are sequentially arranged between the first input end 2 and the first output end 6. Among them, the first input end 2 is connected to the first end of the first cut-off cock 3, the second end of the first cut-off cock 3 is connected to the first end of the solenoid valve 4, the second end of the solenoid valve 4 is connected to the first end of the second cut-off cock 5, and the second end of the second cut-off cock 5 is connected to the first output end 6. Among them, the cut-off cock is a device for controlling the on and off of the air circuit.

[0056] The first coil 18 of the solenoid valve is connected to the raising pantograph switch 17, and the second coil 20 of the solenoid valve is connected to the lowering pantograph switch 19. Among them, the solenoid valve 4 can change the connection mode of the internal air circuit according to the energization mode of different solenoid valve coils. For example, when the raising pantograph switch 17 is triggered, the solenoid valve 4 can conduct the air circuit between the first input end 2 and the first output end 6; when the lowering pantograph switch 19 is triggered, the solenoid valve 4 conducts the air circuit between the first output end 6 and the external environment.

[0057] A third cut-off cock 7 is arranged between the solenoid valve 4 and the second cut-off cock 5, and a second input end 8 is led out through the third cut-off cock 7. The second input end 8 is respectively connected to an air compressor 9 and a foot pump 10. The connection of the air compressor 9 and the foot pump 10 to the second input end 8 integrates the traditional air circuit control device and the emergency raising pantograph device, making the pantograph air circuit control device provided in the embodiment of the present application an integrated pantograph air circuit control device.

[0058] This pantograph air circuit control device integrates the emergency raising pantograph device in the prior art into the original air circuit control device, eliminating the need for duplicate device settings. When the air pressure of the vehicle air cylinder air source is normal, the normal air circuit control device is used to realize the raising and lowering of the pantograph; when the air pressure of the vehicle air source is insufficient, the gas required for raising the pantograph is provided by the foot pump or the air compressor to realize the raising of the pantograph.

[0059] The pantograph air circuit control device provided by the embodiment of the present application inputs the gas output by the vehicle air cylinder air source to the air circuit control device through the first input end. The gas is output to the pantograph through the first output end. A first cut-off cock, a solenoid valve, and a second cut-off cock are sequentially arranged between the first input end and the first output end. When the ascending pantograph switch is triggered, the solenoid valve conducts the air circuit between the first input end and the first output end; when the descending pantograph switch is triggered, the solenoid valve conducts the air circuit between the first output end and the external environment. A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock. The second input end is respectively connected to an air compressor and a foot pump, integrating the emergency ascending pantograph device in the prior art into the original air circuit control device, realizing the integrated air circuit control of the pantograph, avoiding the repeated setting of devices, making the pipeline layout simple and easy, reducing the possibility of pipeline leakage, and improving the reliability and safety of the air circuit control device by adding electrical interlocks. The high degree of centralization of the equipment reduces the occupancy rate of the vehicle interior space.

[0060] In a possible design, referring to Figure 1 as shown, the pantograph air circuit control device provided by the embodiment of the present application further includes: a first check valve 11 and a filter 12.

[0061] Wherein, the first input end 2 is connected to the first end of the first check valve 11, the second end of the first check valve 11 is connected to the first end of the first cut-off cock 3, the second end of the first cut-off cock 3 is connected to the first end of the filter 12, and the second end of the filter 12 is connected to the first end of the solenoid valve 4;

[0062] Wherein, the conduction direction of the first check valve 11 is from the first input end 2 to the first end of the first cut-off cock 3.

[0063] Specifically, the pantograph air circuit control device provided by the embodiment of the present application further includes a first check valve 11 and a filter 12. The first check valve 11 and the filter 12 are located between the first input end 2 and the solenoid valve 4. The first end of the first check valve 11 is connected to the first input end 2, the second end of the first check valve 11 is connected to the first end of the first cut-off cock 3, the second end of the first cut-off cock 3 is connected to the first end of the filter 12, and the second end of the first filter 12 is connected to the first end of the solenoid valve 4. Among them, the first check valve 11 is a device for controlling the single flow direction of the air circuit, and the conduction direction is for the gas to flow from the first input end 2 to the first end of the first cut-off cock 3. The filter 12 can filter out the moisture contained in the gas from the vehicle air cylinder air source 1, so that the gas passing through the air circuit control device and entering the pantograph air bag or cylinder is dry gas.

[0064] The pantograph air circuit control device provided by the embodiment of the present application, when the pantograph needs to be raised, the gas in the vehicle air cylinder air source can only flow from the first input end to the first cut-off cock, and then enter the pantograph air bag or cylinder. And the filter can filter out the moisture contained in the gas, so that the gas passing through the air circuit control device and entering the pantograph air bag or cylinder is dry gas, preventing the influence on the air circuit control device caused by the moisture in the gas causing the circuit and equipment components to be affected by moisture and corrosion.

[0065] In a possible design, referring to Figure 1 As shown, the pantograph air circuit control device provided by the embodiment of the present application further includes: a start switch 13 and a DC-AC converter 14.

[0066] Wherein, the first end of the start switch 13 is used to be connected to the first end of the DC power supply, the second end of the start switch 13 is connected to the first end of the DC-AC converter 14, the second end of the DC-AC converter 14 is used to be connected to the second end of the DC power supply, and the three-phase output end of the DC-AC converter 14 is connected to the air compressor 9.

[0067] Specifically, the pantograph air circuit control device provided by the embodiment of the present application further includes a start switch 13 and a DC-AC converter 14. The first end and the second end of the start switch 13 are respectively connected to the first end of the DC power supply and the first end of the DC-AC converter 14. The second end of the DC-AC converter 14 is connected to the second end of the DC power supply. The three-phase output end of the DC-AC converter is connected to the air compressor 9. Among them, the first end of the DC power supply is its positive pole, and the second end of the DC power supply is its negative pole. This DC power supply can be an on-vehicle battery providing a DC voltage of 110V. Usually, on-rail transit vehicles and main line railway locomotives, there are on-vehicle batteries. It can provide power for the DC-AC converter 14 through the control of the start switch 13. The DC-AC converter 14 inversely converts the DC 110V voltage into an AC 380V voltage to supply power to the air compressor 9.

[0068] The pantograph air circuit control device provided by the embodiment of the present application controls the DC power supply to provide power for the DC-AC converter through the start switch, so that it inversely converts the direct current into alternating current to supply power to the air compressor, and there will no longer be a dead cycle phenomenon caused by the inability of the air source device of the vehicle to raise the pantograph due to insufficient air pressure. Instead, when the catenary cannot provide power, the DC power supply can still provide power for the DC-AC converter, so that it inversely converts the voltage to provide power for the air compressor to make it work normally. When the air compressor works normally, it can provide gas for the air bag or cylinder of the pantograph, so that the pantograph can be raised, enabling the vehicle to enter the normal current collection operation state. The pantograph air circuit control device provided by this embodiment improves the reliability of the air circuit control device and ensures the normal operation of the pantograph of the vehicle.

[0069] In a possible design, with reference to Figure 1 As shown, the pantograph air circuit control device provided by the embodiment of the present application further includes a pressure switch 15.

[0070] Wherein, the first end of the first contact of the pressure switch 15 is connected to the second end of the start switch 13, and the second end of the first contact of the pressure switch 15 is connected to the first end of the DC-AC converter 14;

[0071] The pressure detection end of the pressure switch 15 is connected between the solenoid valve 4 and the second cut-off cock 5.

[0072] The pantograph air circuit control device provided by this embodiment further includes a pressure switch 15. The pressure switch 15 is arranged between the start switch 13 and the DC-AC converter 14. Specifically, the first end and the second end of the first contact of the pressure switch 15 are respectively connected to the second end of the start switch 13 and the first end of the DC-AC converter 14. And the pressure detection end of the pressure switch 15 is connected between the solenoid valve 4 and the second cut-off cock 5, and is used to detect the air pressure in the pipeline between the solenoid valve 4 and the second cut-off cock 5.

[0073] The pressure switch can realize the detection, display, alarm and control signal output of the medium pressure signal, that is, when the preset fluid pressure is reached, the switch contact acts.

[0074] For the pantograph air circuit control device provided by this embodiment, a pressure switch 15 is arranged between the start switch 13 and the DC-AC converter 14, and the detection end of the pressure switch 15 is connected between the solenoid valve 4 and the second cut-off cock 5. When it is necessary to raise the pantograph, if the pressure of the pantograph airbag or cylinder is insufficient, the contact of the pressure switch 15 acts, the circuit is turned on, so that the gas enters the airbag or cylinder. And when the gas pressure in the airbag or cylinder is sufficient to raise the pantograph, the contact of the pressure switch 15 acts, the circuit is cut off, and the supply of gas to the airbag or cylinder is stopped, thereby preventing the negative impacts on safety or service life caused by the excessive gas pressure borne by the pantograph airbag or cylinder, and improving the reliability and safety of the air circuit control device.

[0075] In a possible design, with reference to Figure 1 As shown, the pantograph air circuit control device provided by the embodiment of the present application further includes a forced start switch 16.

[0076] The first end of the forced start switch 16 is connected to the second end of the start switch 13, and the second end of the forced start switch 16 is connected to the first end of the DC-AC converter 14.

[0077] The pantograph air circuit control device provided in this embodiment further includes a forced start switch 16. The forced start switch 16 is arranged between the start switch 13 and the DC-AC converter 14. The first end and the second end of the forced start switch 16 are respectively connected to the second end of the start switch 13 and the first end of the DC-AC converter 14. The forced start switch 16 is used to start the forced start switch 16 when the pressure switch 15 fails to achieve the conduction of the circuit. It can be seen that the setting of the forced start switch 16 further improves the reliability of the air circuit control device.

[0078] In a possible design, referring to Figure 1 As shown, the first end of the pantograph raising switch 17 of the pantograph air circuit control device provided in the embodiment of the present application is used to be connected to the first end of the DC power supply. The second end of the pantograph raising switch 17 is connected to the first end of the second contact of the pressure switch 15. The second end of the second contact of the pressure switch 15 is connected to the first end of the first coil 18 of the solenoid valve. The second end of the first coil 18 of the solenoid valve is used to be connected to the second end of the DC power supply.

[0079] The pantograph raising switch 17 of the pantograph air circuit control device provided in this embodiment is arranged between the DC power supply and the second contact of the pressure switch 15. Among them, the first end and the second end of the pantograph raising switch 17 are respectively connected to the first end of the DC power supply and the first end of the second contact of the pressure switch 15. The second end of the second contact of the pressure switch 15 is connected to the first end of the first coil 18 of the solenoid valve. The second end of the first coil 18 of the solenoid valve is connected to the second end of the DC power supply. The pantograph raising switch 17 is used to start the pantograph air circuit control device when the pantograph needs to be raised. When the pantograph raising switch 17 is pressed, the first coil 18 of the solenoid valve is energized, and the preset contacts in the solenoid valve 4 are closed, so that the air passage between the first input end 2 and the first output end 6 is opened, and the gas in the vehicle air cylinder air source 1 is provided to the air bag or cylinder of the pantograph to raise the pantograph.

[0080] Moreover, the pantograph raising switch 17 is connected to the pressure switch 15, so that the pantograph air circuit control device provided in this embodiment realizes the linkage of control switches. That is, when in the raised state, the pressure of the gas in the air bag or cylinder of the pantograph has reached the preset value to raise the pantograph, but the pantograph raising switch is still in the open state. Then the pressure switch will detect the pressure of the pipeline between the solenoid valve and the second cut-off cock. The contact of the pressure switch acts to cut off the circuit, so as to stop supplying gas to the air bag or cylinder of the pantograph, thereby realizing the protection of the air circuit control device and improving the reliability and safety of the device.

[0081] In a possible design, referring to Figure 1As shown in the figure, the first end of the lowering switch 19 of the pantograph air circuit control device provided by the embodiment of the present application is used to be connected to the first end of the DC power supply, the second end of the lowering switch 19 is connected to the first end of the second coil 20 of the solenoid valve, and the second end of the second coil 20 of the solenoid valve is used to be connected to the second end of the DC power supply.

[0082] The lowering switch 19 of the pantograph air circuit control device provided by this embodiment is arranged between the DC power supply and the second coil 20 of the solenoid valve. Among them, the first end and the second end of the lowering switch 19 are respectively connected to the first end of the DC power supply and the first end of the second coil 20 of the solenoid valve, and the second end of the second coil 20 of the solenoid valve is connected to the second end of the DC power supply. When the lowering switch 19 is pressed, the second coil 20 of the solenoid valve is energized, and the preset contact in the solenoid valve 4 is closed, so that the air circuit between the first output end 6 and the external environment is conducted, and the gas in the pantograph airbag or cylinder is discharged into the atmosphere, and the pantograph drops, realizing the lowering of the pantograph.

[0083] In a possible design, continue to refer to Figure 1 As shown in the figure, the pantograph air circuit control device provided by the embodiment of the present application further includes a second check valve 21.

[0084] The first end of the second check valve 21 is connected to the output end of the air compressor 9, the second end of the second check valve 21 is connected to the first end of the third cut-off cock 7, and the second end of the third cut-off cock 7 is connected between the solenoid valve 4 and the second cut-off cock 5;

[0085] Among them, the direction in which the second check valve 21 can conduct is from the output end of the air compressor 9 to the first end of the third cut-off cock 7.

[0086] The pantograph air circuit control device provided by this embodiment further includes a second check valve 21. The second check valve 21 is arranged between the air compressor 9 and the third cut-off cock 7. Among them, the first end and the second end of the second check valve 21 are respectively connected to the output end of the air compressor 9 and the first end of the third cut-off cock 7, and the second end of the third cut-off cock 7 is connected between the solenoid valve 4 and the second cut-off cock 5. The direction in which the second check valve 21 can conduct is from the output end of the air compressor 9 to the first end of the third cut-off cock 7. When the air compressor 9 starts to work, the second check valve 21 makes the gas flow from the output end of the air compressor 9 to the first end of the third cut-off cock 7, and the gas enters the airbag or cylinder of the pantograph through the third cut-off cock 7 and the second cut-off cock 5, realizing the air supply of the air compressor 9 to the airbag or cylinder.

[0087] In a possible design, refer to Figure 1 As shown in the figure, the pantograph air circuit control device provided by the embodiment of the present application further includes a foot switch 22 and a third check valve 23.

[0088] Among them, the foot switch 22 is used to drive the foot pump 10;

[0089] The first end of the third one-way valve 23 is connected to the output end of the foot pump 10, the second end of the third one-way valve 23 is connected to the first end of the third cut-off cock 7, and the second end of the third cut-off cock 7 is connected between the solenoid valve 4 and the second cut-off cock 5;

[0090] The conduction direction of the third one-way valve 23 is from the output end of the foot pump 10 to the first end of the third cut-off cock 7.

[0091] The pantograph air circuit control device provided in this embodiment further includes a foot switch 22 and a third one-way valve 23. Among them, the foot switch 22 is used to drive the foot pump. The third one-way valve 23 is arranged between the foot pump 10 and the third cut-off cock 7. The first end and the second end of the third one-way valve 23 are respectively connected to the output end of the foot pump 10 and the first end of the third cut-off cock 7. The second end of the third cut-off cock 7 is connected between the solenoid valve 4 and the second cut-off cock 5.

[0092] When the air compressor 9 fails, or other equipment components fail and the air compressor 9 cannot operate normally, open the foot switch 22 and manually step on the foot pump pedal 26 to drive the foot pump 10 to operate. The small-volume cylinder in the foot pump 10 provides the gas required for raising the pantograph for the airbag or cylinder of the pantograph. The third one-way valve 23 allows the gas to flow from the output end of the foot pump 10 to the first end of the third cut-off cock 7, and the gas enters the airbag or cylinder of the pantograph through the second cut-off cock 5 via the third cut-off cock 7, realizing the air supply of the foot pump 10 to the airbag or cylinder. Optionally, when the air compressor 9 is operating normally, the foot pump 10 and the air compressor 9 can also be used to supply gas to the airbag or cylinder of the pantograph at the same time, so that the air pressure in the airbag or cylinder can reach the limit value for raising the pantograph as soon as possible to meet the requirement of rapid emergency raising of the pantograph.

[0093] It can be seen that the setting of the foot pump 10, the foot switch 22 and the third one-way valve 23 further improves the reliability of the air circuit device on the basis of the air compressor 9 and ensures the requirement of emergency raising of the pantograph.

[0094] In a possible design, continue to refer to Figure 1 As shown, the pantograph air circuit control device provided in the embodiment of the present application further includes a test output end 24 and a pressure gauge 25.

[0095] Both the test output end 24 and the pressure gauge 25 are arranged between the second cut-off cock 5 and the first output end 2.

[0096] The pantograph air circuit control device provided in this embodiment further includes a test output terminal 24 and a pressure gauge 25, where both the test output terminal 24 and the pressure gauge 25 are arranged between the second cut-off cock 5 and the first output terminal 2.

[0097] The test output terminal 24 is used for maintenance personnel to repair the air circuit control device and achieve daily maintenance of the pantograph air circuit control device. The pressure gauge 25 is used to determine the specific value of the air pressure in the air circuit when needed. The settings of the test output terminal 24 and the pressure gauge 25 are both for reminding of the faults of the pantograph air circuit control device and for its daily maintenance.

[0098] For the pantograph air circuit control device provided in each of the above embodiments, by integrating the emergency pantograph raising device in the prior art into the air circuit control device in the normal mode, integrated air circuit control of the pantograph is achieved, avoiding repeated setting of devices, making the pipeline layout simple and easy, reducing the possibility of air leakage in the pipeline, and improving the reliability and safety of the air circuit control device through electrical interlocking. The high degree of centralization of the equipment reduces the occupancy rate of the interior space of the vehicle.

[0099] Next, the working process of the pantograph air circuit control device provided in this application under different working conditions will be described with detailed exemplary embodiments. Figure 2 This is the working principle diagram of the pantograph air circuit control device provided in the embodiment of this application. The circuit is represented by the thin line segments in the figure, and the air circuit is represented by the thick line segments in the figure. As Figure 2 shown, its working process is described in detail as follows:

[0100] In the first working condition, when the air pressure of the vehicle air cylinder air source 1 is sufficient, the pantograph raises the bow in the normal mode. At this time, the first cut-off cock 3 and the second cut-off cock 6 are opened, and the third cut-off cock 7 is closed. The gas source in the airbag or air cylinder of the pantograph is the vehicle air cylinder air source 1.

[0101] Bow-raising process: The operator presses the bow-raising switch 17 (i.e., turns on the bow-raising switch 17). If the pressure of the pantograph airbag or cylinder is insufficient and further inflation is required, the contact of the pressure switch 15 does not actuate, the first coil 18 of the solenoid valve is energized, the 1-4 contacts of the solenoid valve 4 are closed, the gas flows out from the vehicle air cylinder air source 1, flows through the first check valve 11 from the first input end 1 to the first cut-off cock 3, the moisture in the gas is filtered by the filter 12, then flows through the solenoid valve 4 and the second cut-off cock 5 in sequence, and finally flows into the pantograph airbag or cylinder through the first output end 6 to achieve bow raising; if the gas pressure in the pantograph airbag or cylinder is already sufficient to achieve bow raising, the contact of the pressure switch 15 actuates, the first coil 18 of the solenoid valve is de-energized, and at this time, even if the bow-raising switch 17 is in the pressed state, the vehicle air cylinder air source 1 will still stop supplying gas to the pantograph airbag or cylinder, realizing the protection of the air circuit control device. The bow-raising switch 17 and the pressure switch 15 are linked to control the switch, preventing negative impacts on safety or service life due to excessive gas pressure borne by the pantograph airbag or cylinder, and improving the reliability and safety of the air circuit control device.

[0102] Bow-lowering process: The operator turns on the bow-lowering switch 19, the second coil 20 of the solenoid valve is energized, the 4-5 contacts of the solenoid valve 4 are closed, the gas in the pantograph airbag or cylinder is discharged into the atmosphere through the first output end 6, and the pantograph drops.

[0103] In the second working condition, when the air pressure of the vehicle air cylinder air source 1 is insufficient, the gas source for the pantograph airbag or cylinder is the air compressor 9 or the foot pump 10. At this time, the third cut-off cock 7 and the second cut-off cock 5 are opened, and the first cut-off cock 3 is closed.

[0104] Bow-raising process: The operator turns on the start switch 13, so that the DC power supply provides direct current for the DC-AC converter 14. The DC-AC converter 14 converts the direct current into alternating current to provide power for the air compressor 9. The air compressor 9 provides gas for the pantograph airbag or cylinder. The gas flows out from the output end of the air compressor 9, flows through the second check valve 21 and the third cut-off cock 7 into the air circuit pipeline in the normal mode, and then flows through the second cut-off cock 5 into the pantograph airbag or cylinder to raise the pantograph. In addition, when the pressure switch 15 fails, the circuit can be conducted through the forced start switch 16 to make the air compressor 9 operate normally to achieve bow raising.

[0105] Alternatively, in this working condition, bow raising can be driven by the foot switch 22 to drive the foot pump 10. The operator manually steps on the foot pump pedal 26, and the foot pump 10 provides gas. The gas flows out from the output end of the foot pump 10, flows through the third check valve 23 and the third cut-off cock 7 into the air circuit pipeline in the normal mode, and then flows through the second cut-off cock 5 into the pantograph airbag or cylinder to raise the pantograph.

[0106] Alternatively, under such operating conditions, the start switch 13 can be turned on to enable the air compressor 9 to operate normally, and at the same time, the foot pump 10 can be driven by the foot switch 22 so that both can supply gas to the airbag or cylinder of the pantograph to meet the requirement of rapid emergency raising of the pantograph.

[0107] Lowering process: When the pantograph is raised by using the above-mentioned emergency raising device, the pantograph enters the normal current collection state and related equipment works normally. At this time, the state of the cut-off cock of the air circuit control device can be switched to enable the pantograph to return to the normal raising and lowering state, and the pantograph is lowered in the manner of the first operating condition. Or directly cut off the second cut-off cock 5 to discharge the gas in the airbag or cylinder of the pantograph into the atmosphere, and the pantograph is lowered.

[0108] Figure 3 The figure is a schematic external view of the pantograph air circuit control device provided by the embodiment of the present application. As Figure 3 shown, the devices exposed outside the pantograph air circuit control device for the staff to operate include control connectors 27, foot pedals, control switches, indicating instruments, etc., and the rest of the equipment and devices are integrated inside the air circuit control device.

[0109] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present application are pointed out by the claims.

[0110] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A pantograph air circuit control device, characterized in that, Comprising: A first input end, a first cut-off cock, a solenoid valve, a second cut-off cock, and a first output end; The first input end is used for inputting the gas output by the vehicle air cylinder air source. The first input end is connected to the first end of the first cut-off cock. The second end of the first cut-off cock is connected to the first end of the solenoid valve. The second end of the solenoid valve is connected to the first end of the second cut-off cock. The second end of the second cut-off cock is connected to the first output end. The first output end is used for outputting gas to the pantograph; The first coil of the solenoid valve is connected to the up-pantograph switch; the second coil of the solenoid valve is connected to the down-pantograph switch. When the up-pantograph switch is triggered, the solenoid valve is used to conduct the gas path between the first input end and the first output end. When the down-pantograph switch is triggered, the solenoid valve is used to conduct the gas path between the first output end and the external environment; A second input end is led out between the solenoid valve and the second cut-off cock through a third cut-off cock. The second input end is respectively connected to an air compressor and a foot pump.

2. The pantograph air circuit control device according to claim 1, characterized in that, Further comprising: A first check valve and a filter; The first input end is connected to the first end of the first check valve. The second end of the first check valve is connected to the first end of the first cut-off cock. The second end of the first cut-off cock is connected to the first end of the filter. The second end of the filter is connected to the first end of the solenoid valve; Wherein, the direction in which the first check valve can conduct is from the first input end to the first end of the first cut-off cock.

3. The pantograph air circuit control device according to claim 2, wherein, Further comprising: A start switch and a DC-AC converter; The first end of the start switch is used for connecting to the first end of a DC power supply. The second end of the start switch is connected to the first end of the DC-AC converter. The second end of the DC-AC converter is used for connecting to the second end of the DC power supply. The three-phase output end of the DC-AC converter is connected to the air compressor.

4. The pantograph air circuit control device according to claim 3, characterized in that, Further comprising: A pressure switch; The first end of the first contact of the pressure switch is connected to the second end of the start switch. The second end of the first contact of the pressure switch is connected to the first end of the DC-AC converter; The pressure detection end of the pressure switch is connected between the solenoid valve and the first end of the second cut-off cock.

5. The pantograph air circuit control device according to claim 4, characterized in that, Further comprising: A forced start switch; The first end of the forced start switch is connected to the second end of the start switch. The second end of the forced start switch is connected to the first end of the DC-AC converter.

6. The pantograph air circuit control device according to claim 5, characterized in that, The first end of the up-pantograph switch is used for connecting to the first end of the DC power supply. The second end of the up-pantograph switch is connected to the first end of the second contact of the pressure switch. The second end of the second contact of the pressure switch is connected to the first end of the first coil of the solenoid valve. The second end of the first coil of the solenoid valve is used for connecting to the second end of the DC power supply.

7. The pantograph air circuit control device according to claim 6, characterized in that, The first end of the down-pantograph switch is used for connecting to the first end of the DC power supply. The second end of the down-pantograph switch is connected to the first end of the second coil of the solenoid valve. The second end of the second coil of the solenoid valve is used for connecting to the second end of the DC power supply.

8. The pantograph air circuit control device according to claim 7, wherein Further comprising: Second check valve; The first end of the second check valve is connected to the output end of the air compressor, the second end of the second check valve is connected to the first end of the third cut-off cock, and the second end of the third cut-off cock is connected between the solenoid valve and the second cut-off cock; Wherein, the conduction direction of the second check valve is from the output end of the air compressor to the first end of the third cut-off cock.

9. The pantograph air circuit control device according to any one of claims 3-8, characterized in that It further includes: A foot switch and a third check valve; The foot switch is used to drive the foot pump; The first end of the third check valve is connected to the output end of the foot pump, the second end of the third check valve is connected to the first end of the third cut-off cock, and the second end of the third cut-off cock is connected between the solenoid valve and the second cut-off cock; Wherein, the conduction direction of the third check valve is from the output end of the foot pump to the first end of the third cut-off cock.

10. The pantograph air circuit control device according to claim 9, characterized in that, It further includes: A test output end and a pressure gauge; Both the test output end and the pressure gauge are arranged between the second cut-off cock and the first output end.

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