CN-121976986-A - Electric control fuelling vehicle reel driving system, reconstruction and installation method and testing method

CN121976986ACN 121976986 ACN121976986 ACN 121976986ACN-121976986-A

Abstract

The invention relates to the technical field of aviation special equipment, discloses an electric control fuelling vehicle reel driving system, a transformation installation method and a testing method, and aims to solve the problems that an existing aviation pipeline fuelling vehicle hydraulic follow-up reel is easy to leak oil, high in failure rate and free of system-level explosion proof verification after transformation. According to the invention, the explosion-proof electromagnetic hydraulic valve group is arranged nearby a reserved position of the original reel, the original follow-up hose and the reel are replaced by the fixed metal hard tube, the redundant electric control loop which only depends on an explosion-proof standby power supply of the original vehicle is matched, and the installation flow is modified in a standardized way and the field explosion-proof test method which covers the whole dimension is matched. The invention eliminates hidden trouble of leakage fault from root, improves the safety redundancy of the system, and can meet the explosion-proof requirement of the aircraft apron and the supervision standard of special equipment for civil aviation.

Inventors

LI JIANGUO
YANG RUNDONG
Pu Chengge
Cai Zhentian
SHU YUHAO
LONG YILIN

Assignees

中国航空油料有限责任公司天府机场分公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (7)

1. An electric control fuelling vehicle reel driving system is used for controlling a lifting platform of an aviation pipeline fuelling vehicle to replace a hydraulic follow-up reel system matched with an original vehicle and is characterized by comprising a hydraulic execution unit and an electric control unit; The hydraulic execution unit comprises an explosion-proof electromagnetic hydraulic valve group arranged at a reserved installation position of the original vehicle hydraulic follow-up reel after being dismantled, a fixed metal hydraulic hard pipe for communicating the original vehicle hydraulic station with the explosion-proof electromagnetic hydraulic valve group, and a fixed metal hydraulic hard pipe for communicating the explosion-proof electromagnetic hydraulic valve group with the lifting platform hydraulic cylinder; The electric control unit comprises a power input module electrically connected with a standby power supply of an explosion-proof junction box of the original vehicle platform, a main lifting control loop electrically connected with an explosion-proof electromagnetic hydraulic valve bank, a multistage redundant emergency descending control loop physically isolated from the main lifting control loop, and a fault monitoring and lamp display feedback module; The input end of the power input module is electrically connected with a 12V direct current standby power supply of an explosion-proof junction box of the original vehicle platform, and the output end of the power input module is respectively used for supplying power to a main lifting control loop, a multistage redundant emergency descending control loop and a fault monitoring and lamp display feedback module.
2. The electrically controlled fuelling vehicle reel driving system according to claim 1, wherein the main lifting control loop comprises two groups of anti-explosion double-coil electromagnetic directional valves which respectively correspond to lifting platform lifting and descending actions, two coils of each group of electromagnetic directional valves adopt independent wiring and independent fuse protection, and the main lifting control loop is further provided with an electric interlocking and mechanical interlocking double-interlocking structure for lifting and descending actions and a platform upper limit and lower limit anti-explosion travel switch which is connected in series in the main lifting control loop.
3. The electrically controlled fuelling vehicle reel drive system of claim 1, wherein said multi-level redundant emergency descent control circuit is a fully independent power and wiring structure from a main lift control circuit, including three levels of redundant circuits arranged in parallel: the first stage is a platform position emergency descending loop with a knob unlocking structure, which is arranged at the operation position of the lifting platform; The second stage is a ground position emergency descending loop with a knob unlocking structure, which is arranged at the ground operation position of the chassis; and the third stage is an explosion-proof manual stop valve bypass connected in parallel on the emergency descending hydraulic circuit.
4. The electric control fuelling vehicle reel driving system according to claim 1, wherein the fault monitoring and lamp display feedback module is of a pure hardware circuit structure and comprises an explosion-proof signal lamp corresponding to normal power supply, action execution and fault early warning respectively, a current sampling unit for collecting loop current of an electromagnetic valve and a fault judging comparator, so that fault triggering and lamp display early warning of coil disconnection and loop overcurrent/short circuit can be realized, a corresponding main loop is cut off during faults, and power supply of an emergency descent control loop is reserved.
5. A method of retrofitting an electrically controlled fuelling vehicle reel drive system for retrofitting an original vehicle belt hydraulic follow-up reel lifting system to an electrically controlled fuelling vehicle reel drive system according to any one of claims 1 to 4, comprising the steps of: s1, firstly, parking an oiling vehicle to be modified to a designated safety area and fixing the oiling vehicle to be modified, completing risk identification and personnel safety training, and disconnecting the total power supply of the original vehicle hydraulic system and the original vehicle electric system; s2, removing a hydraulic follow-up reel assembly, a follow-up hydraulic hose, a manual hydraulic reversing valve and a corresponding connecting pipeline which are matched with the original vehicle; S3, fixing an explosion-proof electromagnetic hydraulic valve bank at a reserved installation position of the hydraulic follow-up reel of the original vehicle, and respectively communicating the hydraulic station of the original vehicle with the explosion-proof electromagnetic hydraulic valve bank, the explosion-proof electromagnetic hydraulic valve bank and the hydraulic cylinder of the lifting platform by adopting a fixed metal hydraulic hard pipe to finish sealing and pressure test of a hydraulic pipeline; S4, installing an electric control unit, namely arranging an explosion-proof cable and a wiring pipeline, and completing the installation and wiring of an explosion-proof junction box, an operation button and a signal lamp of a power input module, a main lifting control loop, a multi-stage redundancy emergency descending control loop and a fault monitoring and lamp display feedback module, wherein all the wiring is sealed through an explosion-proof sealing joint; S5, recovering the original power supply and the hydraulic system of the vehicle, sequentially completing the main lifting action, the multi-stage emergency descending action and the no-load and load debugging of the fault early warning function, and confirming that the system acts normally, has no leakage and has no misoperation.
6. The method for reforming and installing the electric control fuelling vehicle reel driving system according to claim 5, wherein in the step S4, all the metal shells, the hydraulic pipelines and the installing supports of the electric control units are grounded with the original vehicle chassis in a double-point equipotential manner, the grounding resistance is less than or equal to 4Ω, all the cables are laid through flame retardant corrugated pipes in the whole course, and the drag chain protection is additionally arranged at the turning position.
7. A test method of an electric control fuelling vehicle reel driving system is characterized in that, an in-situ explosion proof standard test for an electrically controlled fuelling vehicle reel drive system according to any one of claims 1 to 4, comprising the steps of: The method comprises the steps of T1, checking explosion proof qualification and nameplate information of all charged elements of a system, and confirming that explosion proof grades of all the elements are not lower than ExdIIBT, protection grades are not lower than IP65, and rated parameters are matched with design values; Testing the grounding resistance of all metal parts and the chassis of the original vehicle, and confirming that the grounding resistance of all test points is not more than 4Ω; t3, testing insulation resistance of the electrified loop and the grounding end of the system to be not less than 20MΩ, simulating short-circuit fault of the loop, and testing maximum discharge spark energy in a short-circuit state to be not more than 0.28mJ; T4, simulating extreme working conditions of vehicle vibration and apron electromagnetic interference, wherein the test system has no misoperation of an electromagnetic valve, no abnormal discharge and no explosion-proof performance attenuation; And T5, simulating the power failure, short circuit and coil burning failure of the main loop, triggering the multi-stage emergency descent control loop, and confirming that no spark and abnormal discharge exist in the emergency action process and the grounding continuity is not interrupted.

Description

Electric control fuelling vehicle reel driving system, reconstruction and installation method and testing method Technical Field The invention belongs to the technical field of hydraulic control, and particularly relates to an electric control fuelling vehicle reel driving system, a transformation installation method and a testing method. Background The aviation pipeline fuelling vehicle is a core special device for providing aviation fuel filling service for an airplane in an airport apron, wherein the low-altitude pipeline fuelling vehicle is matched with a liftable operation platform for adapting to the high operation demands of fuelling ports of different types. In the prior art, in a hydraulic driving system of a lifting platform, a hydraulic control valve group of the hydraulic driving system is generally fixedly arranged on a chassis of an oiling truck, a hydraulic cylinder for executing actions is arranged on a lifting platform body, the hydraulic control valve group and the hydraulic cylinder are communicated through a flexible hydraulic hose, a hydraulic driving follow-up reel is arranged in a matched manner for adapting to the dynamic change of the length of a pipeline in the lifting process of the platform, and is used for synchronously retracting the hydraulic hose along with the lifting of the platform, so that the regularity and the oil supply continuity of the pipeline are ensured. The follow-up reel structure is influenced by high-frequency rotation retraction and complex environment of the apron in the long-term use process, oil seepage easily occurs in rotary dynamic seal of the reel, a hydraulic hose is easy to age and crack after repeated bending, the integral failure rate of equipment is high, the maintenance period is long, leaked hydraulic oil can form potential safety hazards in an explosive gas environment of the apron, meanwhile, the operation flexibility of the existing matched manual hydraulic control valve is insufficient, the safety redundancy of an emergency descent function is low, platform clamping stagnation is easily caused by single element faults, the normal operation order of the apron is influenced, the existing improvement scheme aiming at the equipment is lack of a special electric control system design of an adaptation scene, a corresponding system-level field explosion-proof compliance test method is also not available, the integral explosion-proof safety of the system under the apron after improvement cannot be guaranteed only by means of laboratory explosion-proof authentication of a single element, and the supervision requirement of special equipment of civil aviation is difficult to be met. Disclosure of Invention In order to solve the problems in the prior art, the invention provides an electric control fuelling vehicle reel driving system, a reforming installation method and a testing method, and aims to eliminate the hidden trouble of hose bending and dynamic seal leakage by replacing an original hydraulic follow-up reel through an explosion-proof electromagnetic hydraulic valve group and a fixed metal hard pipe structure which are arranged nearby. The technical scheme adopted by the invention is as follows: In a first aspect, the invention provides an electric control fuelling vehicle reel driving system, which is used for controlling a lifting platform of an aviation pipeline fuelling vehicle and replacing a hydraulic follow-up reel system matched with an original vehicle, and comprises a hydraulic execution unit and an electric control unit; The hydraulic execution unit comprises an explosion-proof electromagnetic hydraulic valve group arranged at a reserved installation position of the original vehicle hydraulic follow-up reel after being dismantled, a fixed metal hydraulic hard pipe for communicating the original vehicle hydraulic station with the explosion-proof electromagnetic hydraulic valve group, and a fixed metal hydraulic hard pipe for communicating the explosion-proof electromagnetic hydraulic valve group with the lifting platform hydraulic cylinder; The electric control unit comprises a power input module electrically connected with a standby power supply of an explosion-proof junction box of the original vehicle platform, a main lifting control loop electrically connected with an explosion-proof electromagnetic hydraulic valve bank, a multistage redundant emergency descending control loop physically isolated from the main lifting control loop, and a fault monitoring and lamp display feedback module; The input end of the power input module is only electrically connected with a 12V direct current standby power supply of an explosion-proof junction box of the original vehicle platform, and the output end of the power input module is respectively used for supplying power to the main lifting control loop, the multistage redundant emergency descending control loop and the fault monitoring and lamp display feedback module. With reference to the firs