Emergency recovery system for hydraulic supporting legs

Abstract

The utility model relates to the technical field of vehicle-mounted hydraulic supporting legs, and discloses a hydraulic supporting leg emergency recovery system which comprises an emergency hydraulic control module and an emergency circuit control module, the liquid inlet end of the emergency hydraulic control module is communicated with a hydraulic oil tank, and the liquid outlet end of the emergency hydraulic control module is communicated with the hydraulic supply end of an original vehicle hydraulic control system; a liquid conveying loop of the emergency hydraulic control module is provided with a hydraulic power unit; the emergency circuit control module is provided with an independent power supply and an emergency switch S1 for switching on and off a power supply loop of the hydraulic power unit; and two power supply access poles of the hydraulic power unit are respectively connected to two poles of the independent power supply. Compared with the prior art, the emergency recovery system has the advantages that the hydraulic supporting legs can be rapidly retracted when a luggage conveying belt vehicle or a passenger boarding vehicle breaks down, the emergency evacuation efficiency when an original vehicle hydraulic control system breaks down is improved, a runway of an aircraft is prevented from being blocked by a fault vehicle, and therefore the safety and the operation order of the aircraft are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted hydraulic outriggers, in particular to an emergency recovery system for hydraulic outriggers. Background Art

[0002] Baggage conveyor belt vehicles and passenger boarding vehicles are special ground support equipment serving civil aviation transportation activities, and usually work closely around aircraft. Among them, the baggage conveyor belt vehicle is a vehicle equipment that transports luggage between the ground and the luggage flight compartment, while the passenger boarding vehicle is a self-propelled ladder structure vehicle equipment that serves passengers to get on and off the aircraft when the aircraft is parked at a remote parking position without a jet bridge.

[0003] In order to ensure the stability of the luggage conveyor during luggage delivery and the passenger boarding vehicle during passenger boarding, hydraulic legs are usually lowered to support the above two vehicles. Once the built-in equipment of the existing two vehicles fails, the original vehicle hydraulic control system will not be able to operate due to power failure, and it takes at least 5 minutes to mechanically operate the hydraulic legs, which may easily cause the above two vehicles to be unable to withdraw in time and stay around the aircraft, which may affect the normal operation of the aircraft and cause flight delays, or even pose a safety threat to the aircraft. Utility Model Content

[0004] The utility model provides a hydraulic outrigger emergency recovery system, which is used to solve the problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hydraulic outrigger emergency recovery system comprises an emergency hydraulic control module and an emergency circuit control module, wherein the liquid inlet end of the emergency hydraulic control module is connected to a hydraulic oil tank, and the liquid outlet end of the emergency hydraulic control module is connected to a hydraulic supply end of an original vehicle hydraulic control system; the infusion circuit of the emergency hydraulic control module is provided with a hydraulic power unit, and the infusion circuit of the emergency hydraulic control module is connected in parallel with the infusion circuit for infusing liquid into the original vehicle hydraulic control system; the emergency circuit control module is provided with an independent power supply and an emergency switch S1 for switching on and off the power supply circuit of the hydraulic power unit, and the two power supply access poles of the hydraulic power unit are respectively connected to the two poles of the independent power supply.

[0007] Through the above technical solution, when the original vehicle hydraulic control system cannot operate due to power failure, the emergency switch S1 is pressed, and the independent power supply in the emergency circuit control module supplies power to the hydraulic power unit to make the hydraulic power unit work, so that the emergency hydraulic control module can supply hydraulic fluid with the help of the delivery pipeline of the original vehicle hydraulic control system, change the hydraulic pressure of the hydraulic legs of the baggage conveyor car and the passenger boarding car, and then quickly retract the hydraulic legs of the baggage conveyor car and the passenger boarding car.

[0008] Preferably, the emergency hydraulic control module includes a first three-way joint and a second three-way joint, the liquid inlet end of the first three-way joint is connected to the hydraulic oil tank, the first liquid outlet end of the first three-way joint is connected to the liquid inlet end of the original vehicle pump, and the second liquid outlet end of the first three-way joint is connected to the liquid inlet end of the hydraulic power unit; the first liquid inlet end of the second three-way joint is connected to the liquid outlet end of the original vehicle pump, the second liquid inlet end of the second three-way joint is connected to the liquid outlet end of the hydraulic power unit, and the liquid outlet end of the second three-way joint is connected to the hydraulic supply end of the original vehicle hydraulic control system.

[0009] Preferably, the emergency hydraulic control module also includes a tubular one-way valve, the second liquid inlet end of the second three-way connector is connected to the liquid outlet of the tubular one-way valve, and the liquid inlet of the tubular one-way valve is connected to the liquid outlet end of the hydraulic power unit.

[0010] Preferably, the emergency circuit control module includes a time relay and a switch relay, the time relay includes a relay coil KT1 and a normally closed delay switch KT1-1, and the switch relay includes a switch coil KM1 and a normally open switch KM1-1; one end of the relay coil KT1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the emergency switch S1 and then connected to the negative pole of the independent power supply; one end of the switch coil KM1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the normally closed delay switch KT1-1 and the emergency switch S1 in sequence and then connected to the negative pole of the independent power supply; the positive pole of the hydraulic power unit is connected to the positive pole of the independent power supply, and the negative pole of the hydraulic power unit is connected in series with the normally open switch KM1-1 and then connected to the negative pole of the independent power supply.

[0011] Preferably, the emergency circuit control module further includes a fuse FU1, which is arranged in the power supply branch of the emergency circuit control module, and the fuse FU1 is connected in series with a normally open switch KM1-1.

[0012] Preferably, the emergency circuit control module further includes a fuse FU2, which is arranged in the power supply branch of the emergency circuit control module, and the fuse FU2 is connected in series with the relay coil KT1, and the fuse FU2 is connected in parallel with the fuse FU1.

[0013] Preferably, the emergency circuit control module also includes a diode D30, the positive electrode of the diode D30 is connected in series with the normally closed delay switch KT1-1, the emergency switch S1 and the fuse FU2 and then connected to the negative electrode of the independent power supply, and the negative electrode of the diode D30 is connected to the original recovery circuit of the original vehicle circuit control system.

[0014] The beneficial effects of the utility model are:

[0015] 1. Compared with the prior art, the emergency recovery system of the utility model can quickly retract the hydraulic legs when a baggage conveyor car or a passenger boarding car fails, thereby improving the emergency evacuation efficiency when the hydraulic control system of the original car fails, avoiding the runway of the aircraft being blocked by the faulty vehicle, thereby ensuring the safety and operation order of the aircraft.

[0016] 2. Compared with the prior art, a one-way valve is provided in the emergency hydraulic control module, which can effectively reduce the possibility of liquid backflow, so that the emergency hydraulic control module is only used to retract the hydraulic legs.

[0017] 3. Compared with the existing technology, the emergency circuit control module is equipped with a time relay, which can set the working time according to the actual situation to adapt to the folding of hydraulic legs of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the oil circuit connection diagram of the emergency hydraulic control module and the original vehicle hydraulic control system in the embodiment of the utility model;

[0019] Figure 2 It is a circuit diagram of the emergency circuit control module in the embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Hydraulic power unit; 2. First three-way connector; 3. Second three-way connector; 4. Tubular one-way valve; 5. Time relay; 6. Switch relay. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] Reference Figure 1 and Figure 2, this embodiment discloses a hydraulic outrigger emergency recovery system, which includes an emergency hydraulic control module and an emergency circuit control module.

[0025] Among them, Figure 1 As shown, the emergency hydraulic control module includes a hydraulic power unit 1, a first three-way joint 2, a second three-way joint 3 and a tubular one-way valve 4. The liquid inlet of the first three-way joint 2 is connected to the hydraulic oil tank, the first liquid outlet of the first three-way joint 2 is connected to the liquid inlet of the original vehicle pump, and the second liquid outlet of the first three-way joint 2 is connected to the liquid inlet of the hydraulic power unit 1. The first liquid inlet of the second three-way joint 3 is connected to the liquid outlet of the original vehicle pump, the second liquid inlet of the second three-way joint 3 is connected to the liquid outlet of the tubular one-way valve 4, and the liquid inlet of the tubular one-way valve 4 is connected to the liquid outlet of the hydraulic power unit 1, and the liquid outlet of the second three-way joint 3 is connected to the hydraulic supply end of the original vehicle hydraulic control system.

[0026] Through the above technical solution, the emergency hydraulic control module of the utility model is improved on the basis of the original hydraulic control system and the original pump of the original vehicle, and the first three-way connector 2 and the second three-way connector 3 are added to reduce unnecessary pipeline addition, reduce the improvement cost, and minimize the occupied space of the emergency hydraulic control module. In addition, a one-way valve is provided in the emergency hydraulic control module, which can effectively reduce the possibility of liquid backflow, so that the emergency hydraulic control module is only used to retract the hydraulic legs.

[0027] It needs to be explained that the above-mentioned original vehicle pump is an emergency hand oil pump, which can change the hydraulic pressure of the hydraulic outrigger through manual operation to retract the hydraulic outrigger.

[0028] Among them, Figure 2 As shown, the emergency circuit control module includes an emergency switch S1, a time relay 5, a switch relay 6, a fuse FU1 and a fuse FU2. The time relay 5 includes a relay coil KT1 and a normally closed delay switch KT1-1, and the switch relay 6 includes a switch coil KM1 and a normally open switch KM1-1. In this embodiment, the independent power supply adopts a low-voltage battery power supply GB, the rated current of the fuse FU1 is 200A, and the rated current of the fuse FU2 is 10A. One end of the relay coil KT1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the emergency switch S1 and the fuse FU2 and then connected to the negative pole of the independent power supply. One end of the switch coil KM1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the normally closed delay switch KT1-1, the emergency switch S1 and the fuse FU2 and then connected to the negative pole of the independent power supply. The positive pole of the hydraulic power unit 1 is connected to the positive pole of the independent power supply, and the negative pole thereof is connected in series with the normally open switch KM1-1 and the fuse FU1 and then connected to the negative pole of the independent power supply.

[0029] Through the above technical solution, when the original vehicle hydraulic control system cannot operate due to power failure, the staff presses the emergency switch S1, the switch coil KM1 is energized, and the normally open switch KM1-1 is closed. At this time, the independent power supply supplies power to the hydraulic power unit 1, so that the hydraulic power unit 1 works, so that the emergency hydraulic control module can perform the fluid supply work with the help of the delivery pipeline of the original vehicle hydraulic control system, thereby changing the hydraulic pressure of the hydraulic legs of the baggage conveyor belt car and the passenger boarding car, and then quickly retracting the hydraulic legs of the baggage conveyor belt car and the passenger boarding car. When the emergency switch S1 is pressed, the relay coil KT1 is also energized. When the preset delay disconnection time of the time relay 5 is reached, the normally closed delay switch KT1-1 is disconnected, so that the hydraulic power unit 1 is delayed to disconnect, thereby reducing the process of manual shutdown.

[0030] It should be explained that the time relay 5 can set the working time according to the actual situation to adapt to the folding of hydraulic legs of different lengths. In this embodiment, the working time is 8s.

[0031] Compared with the prior art, the emergency recovery system of the utility model can quickly retract the hydraulic legs when a baggage conveyor car or a passenger boarding car fails, thereby improving the emergency evacuation efficiency when the original vehicle's hydraulic control system fails, avoiding the aircraft's runway being blocked by the faulty vehicle, thereby ensuring the safety and operation order of the aircraft.

[0032] The emergency circuit control module of this embodiment also includes an instrument panel and a diode D30. The instrument panel is a mechanical knob instrument panel, which is installed on the original vehicle control panel. An electrical circuit control button is set on the instrument panel and the button can be linked to the emergency switch S1. The positive electrode of the diode D30 is connected in series with the normally closed delay switch KT1-1, the emergency switch S1 and the fuse FU2 in sequence, and then connected to the negative electrode of the independent power supply. The negative electrode of the diode D30 is connected to the original recovery circuit of the original vehicle circuit control system. The above technical solution is used to protect the emergency circuit control module. On the one hand, it is used to prevent the reverse interference current of the original vehicle circuit control system from damaging the emergency circuit control module, and on the other hand, it can realize the sharing of the ground line.

[0033] The working principle of the utility model is:

[0034] The emergency switch S1 is closed, and the hydraulic power unit 1 is powered by the low-voltage battery pack, driving the hydraulic pump built into the hydraulic power unit 1. The hydraulic oil in the hydraulic oil tank assembly flows into the original vehicle hydraulic valve assembly in the original vehicle hydraulic control system after passing through the above-mentioned hydraulic pump and the tubular one-way valve 4, and further flows into the hydraulic system assembly of the supporting leg to achieve the recovery of the supporting leg. The time relay 5 controls the recovery time of the supporting leg. When the time is up, the supporting leg has been recovered, and the power supply circuit of the hydraulic power unit 1 is automatically disconnected and stops working. Personnel do not need to perform additional power-off operations.

[0035] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A hydraulic outrigger emergency recovery system, characterized in that: The invention comprises an emergency hydraulic control module and an emergency circuit control module, wherein the liquid inlet end of the emergency hydraulic control module is connected to a hydraulic oil tank, and the liquid outlet end of the emergency hydraulic control module is connected to a hydraulic supply end of an original vehicle hydraulic control system; the liquid infusion circuit of the emergency hydraulic control module is provided with a hydraulic power unit (1), and the liquid infusion circuit of the emergency hydraulic control module is connected in parallel with the liquid infusion circuit for infusing liquid into the original vehicle hydraulic control system; the emergency circuit control module is provided with an independent power supply and an emergency switch S1 for switching on and off the power supply circuit of the hydraulic power unit (1), and the two power supply access poles of the hydraulic power unit (1) are respectively connected to the two poles of the independent power supply.

2. The hydraulic outrigger emergency recovery system according to claim 1, characterized in that: The emergency hydraulic control module comprises a first three-way joint (2) and a second three-way joint (3); the liquid inlet end of the first three-way joint (2) is connected to the hydraulic oil tank, the first liquid outlet end of the first three-way joint (2) is connected to the liquid inlet end of the original vehicle pump, and the second liquid outlet end of the first three-way joint (2) is connected to the liquid inlet end of the hydraulic power unit (1); the first liquid inlet end of the second three-way joint (3) is connected to the liquid outlet end of the original vehicle pump, the second liquid inlet end of the second three-way joint (3) is connected to the liquid outlet end of the hydraulic power unit (1), and the liquid outlet end of the second three-way joint (3) is connected to the hydraulic supply end of the original vehicle hydraulic control system.

3. The hydraulic outrigger emergency recovery system according to claim 2, characterized in that: The emergency hydraulic control module further comprises a tubular one-way valve (4), the second liquid inlet end of the second three-way connector (3) being connected to the liquid outlet end of the tubular one-way valve (4), and the liquid inlet end of the tubular one-way valve (4) being connected to the liquid outlet end of the hydraulic power unit (1).

4. The hydraulic outrigger emergency recovery system according to claim 1, characterized in that: The emergency circuit control module comprises a time relay (5) and a switch relay (6), wherein the time relay (5) comprises a relay coil KT1 and a normally closed time delay switch KT1-1, and the switch relay (6) comprises a switch coil KM1 and a normally open switch KM1-1; one end of the relay coil KT1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the emergency switch S1 and then connected to the negative pole of the independent power supply; one end of the switch coil KM1 is connected to the positive pole of the independent power supply, and the other end is connected in series with the normally closed time delay switch KT1-1 and the emergency switch S1 in sequence and then connected to the negative pole of the independent power supply; the positive pole of the hydraulic power unit (1) is connected to the positive pole of the independent power supply, and the negative pole of the hydraulic power unit (1) is connected in series with the normally open switch KM1-1 and then connected to the negative pole of the independent power supply.

5. The hydraulic outrigger emergency recovery system according to claim 4, characterized in that: The emergency circuit control module also includes a fuse FU1, which is arranged in the power supply branch of the emergency circuit control module, and the fuse FU1 is connected in series with the normally open switch KM1-1.

6. The hydraulic outrigger emergency recovery system according to claim 5, characterized in that: The emergency circuit control module also includes a fuse FU2, which is arranged in the power supply branch of the emergency circuit control module. The fuse FU2 is connected in series with the relay coil KT1, and the fuse FU2 is connected in parallel with the fuse FU1.

7. The hydraulic outrigger emergency recovery system according to claim 6, characterized in that: The emergency circuit control module also includes a diode D30, the anode of which is connected in series with the normally closed delay switch KT1-1, the emergency switch S1 and the fuse FU2 in sequence and then connected to the cathode of the independent power supply, and the cathode of the diode D30 is connected to the original recovery circuit of the original vehicle circuit control system.

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