阅读说明：本技术 一种应用于铁路跨越防护装备的分布式液压系统 (Distributed hydraulic system applied to railway crossing protective equipment ) 是由 马腾跃 安刚建 周华龙 张迪迪 袁正璞 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种应用于铁路跨越防护装备的分布式液压系统,包括采用变量泵负载敏感和定量泵远程调压的组合式随车液压系统、采用功率电传的闭式电动静液压执行器的防护装置液压系统及用于控制组合式随车液压系统和防护装置液压系统的控制器,随车液压系统包括承力平台水平移动模块、液压支腿模块、中间立柱变幅模块和纵梁变幅模块,防护装置液压系统包括横梁组件旋转模块；承力平台水平移动模块、液压支腿模块、中间立柱变幅模块、纵梁变幅模块和横梁组件旋转模块均与控制器通信连接,并依次按照控制器内预设动作完成随车搭建工作,且随车液压系统可以根据不同阶段功能需求进行切换有效提高装备的工作效率。(The invention discloses a distributed hydraulic system applied to railway crossing protective equipment, which comprises a combined type vehicle-mounted hydraulic system adopting variable pump load sensing and constant pump remote pressure regulation, a protective device hydraulic system adopting a power electric transmission closed type electro-hydrostatic actuator and a controller for controlling the combined type vehicle-mounted hydraulic system and the protective device hydraulic system, wherein the vehicle-mounted hydraulic system comprises a force bearing platform horizontal moving module, a hydraulic support leg module, a middle upright post amplitude changing module and a longitudinal beam amplitude changing module; bearing platform horizontal migration module, hydraulic leg module, middle standing pillar become width of cloth module, longeron become width of cloth module and crossbeam subassembly rotation module all with controller communication connection to predetermine the action according to in the controller in proper order and accomplish the vehicle-mounted and build the work, and vehicle-mounted hydraulic system can switch according to different stage function demands and effectively improve the work efficiency of equipment.)

1. A distributed hydraulic system applied to railway crossing protective equipment comprises a combined vehicle-mounted hydraulic system adopting variable pump load sensing and constant pump remote pressure regulation, a protective device hydraulic system adopting a power electric transmission closed type electric hydrostatic actuator and a controller for controlling the combined vehicle-mounted hydraulic system and the protective device hydraulic system, and is characterized in that the vehicle-mounted hydraulic system comprises a force bearing platform horizontal moving module, a hydraulic support leg module, a middle upright post amplitude changing module and a longitudinal beam amplitude changing module, and the protective device hydraulic system comprises a beam assembly rotating module;

the bearing platform horizontal moving module, the hydraulic support leg module, the middle upright post amplitude changing module, the longitudinal beam amplitude changing module and the cross beam assembly rotating module are all in communication connection with the controller, and vehicle-mounted construction work is completed according to preset actions in the controller in sequence.

2. The distributed hydraulic system applied to railway crossing protection equipment is characterized in that the force bearing platform horizontal moving module comprises two single-side parallel double-cylinder circuits connected with a main oil way, wherein a horizontal push-out circuit bidirectional hydraulic lock (30), a one-way throttle valve (28) and a three-position four-way electromagnetic reversing valve (29) are sequentially arranged in the direction from a horizontal push-out oil cylinder (31) to the main oil way in the single-side parallel double-cylinder circuit; an oil outlet and an oil return port at one end of a horizontal push-out loop bidirectional hydraulic lock (30) are respectively communicated with a rod cavity and a rodless cavity of a horizontal push-out oil cylinder (31), an oil inlet and an oil outlet at the other end of the horizontal push-out loop bidirectional hydraulic lock (30) are respectively communicated with one ends of two one-way throttle valves (28), the other ends of the two one-way throttle valves (28) are respectively communicated with an A, B oil port of a three-position four-way electromagnetic directional valve (29), a P oil port of the three-position four-way electromagnetic directional valve (29) is connected with a high-pressure main oil way in a main oil way, and a T oil port is connected with an oil return way in the main oil way.

3. The distributed hydraulic system applied to railway crossing protection equipment as claimed in claim 2, wherein the oil inlet and the oil outlet of the horizontal push-out cylinder circuit are provided with pressure sensors (32).

4. The distributed hydraulic system applied to the railway crossing protective equipment is characterized in that the hydraulic support leg module comprises a force bearing support leg oil cylinder (14), a support leg loop multi-way directional valve (16), a support leg loop bidirectional hydraulic lock (15) and a support leg loop pressure sensor (33), wherein the force bearing support leg oil cylinder (14) is controlled by the support leg multi-way directional valve (16), the support leg loop bidirectional hydraulic lock (15) and the support leg loop pressure sensor (33) are arranged on an oil path between A, B oil ports of the force bearing support leg oil cylinder (14) and the support leg multi-way directional valve (16), and a P, T oil port of the support leg loop multi-way directional valve (16) is respectively connected with a high-pressure main oil path in the main oil path and an oil return path in the main oil path.

5. The distributed hydraulic system applied to railway crossing protective equipment is characterized in that the middle upright amplitude module comprises a middle upright amplitude cylinder (1), an oil inlet and an oil outlet of the middle upright amplitude cylinder (1) are respectively communicated with one end of an amplitude-variable loop explosion-proof valve (3), the other end of the amplitude-variable loop explosion-proof valve (3) is communicated with one end of a balance valve (4), the other end of the balance valve (4) is communicated with a middle upright loop multi-way reversing valve (10), an oil inlet of the middle upright loop multi-way reversing valve (10) is communicated with a high-pressure main oil way in a main oil way, and the oil outlet is communicated with an oil return way in the main oil way.

6. The distributed hydraulic system applied to railway crossing protective equipment is characterized in that two amplitude cylinder pressure sensors (2) are arranged on an oil way of the oil inlet and the oil return port of the amplitude cylinder of the middle upright post, which are communicated with the explosion-proof valve.

7. The distributed hydraulic system applied to railway crossing protective equipment is characterized in that the longitudinal beam amplitude-varying module comprises a longitudinal beam amplitude-varying oil cylinder (13), an oil inlet and an oil outlet of the longitudinal beam amplitude-varying oil cylinder (13) are respectively communicated with one end of an amplitude-varying loop explosion-proof valve, the other end of the amplitude-varying loop explosion-proof valve (3) is communicated with one end of a balance valve (4), the other end of the balance valve (4) is communicated with a longitudinal beam amplitude-varying loop multi-way reversing valve (12), an oil inlet of the longitudinal beam amplitude-varying loop multi-way reversing valve (12) is communicated with a high-pressure main oil way in a main oil way, and an oil outlet is communicated with an oil return way in the main oil way.

8. The distributed hydraulic system applied to the railway crossing protective equipment is characterized in that two amplitude-variable oil cylinder pressure sensors are arranged on an oil way of the oil inlet and the oil return port of the longitudinal beam amplitude-variable oil cylinder (13) communicated with the longitudinal beam amplitude-variable explosion-proof valve.

9. The distributed hydraulic system applied to railway crossing protection equipment is characterized in that the beam assembly rotating module comprises a beam assembly rotating oil cylinder (34), a one-way throttle valve (35), a one-way filter (36), a motor (37), a hydraulic pump (38), an oil tank (39), an overflow valve (40), an oil return filter (41), a flow matching valve (42) and a beam balancing valve (43), wherein an oil inlet and an oil return port of the beam assembly rotating oil cylinder (34) are respectively connected with the beam balancing valve (43) and the one-way throttle valve (35), the beam balancing valve (43) and the one-way throttle valve (35) are both communicated with one end of the one-way filter (36), the other end of the one-way filter (36) is communicated with one end of the hydraulic pump and the flow matching valve (42), and the other end of the flow matching valve (42) is communicated with the oil tank, the other end of the hydraulic pump is fixedly connected with the output end of the motor.

10. The distributed hydraulic system applied to railway crossing protective equipment according to claim 1, wherein the on-vehicle construction work is completed sequentially according to preset actions in the controller, and the system comprises:

the controller controls the two-position three-way electromagnetic directional valve (23) and the two-position two-way electromagnetic directional valve (24) to be switched to the right position, the variable pump (17) is switched to work as a fixed displacement pump, the three-position four-way electromagnetic directional valve (29) is switched to the right position, the one-way throttle valve (28) adjusts the pushing speed of the oil cylinder, the horizontal pushing loop pressure sensor (32) monitors the pressure condition of the loop, the four horizontal pushing oil cylinders (31) are respectively pushed to two sides to push the force-bearing support and the hydraulic support oil cylinder (14) to two sides of the equipment, when the four horizontal pushing oil cylinders (14) extend to the proper position, the two-position three-way electromagnetic directional valve (23) and the two-position two-way electromagnetic directional valve (24) are switched to the left position, the three-position four-way electromagnetic directional valve (29) is switched to the middle position, the variable pump (17) is switched back to the variable pump by the fixed displacement pump, the horizontal pushing loop stops oil feeding, and the two-way hydraulic lock (30) is locked at the same time, the horizontal push-out oil cylinder (14) is locked to complete the construction of the horizontal moving module of the bearing platform;

then, four multi-way directional valves (16) of a hydraulic support leg loop are opened, the multi-way directional valves are switched to the left position from the middle position function, high-pressure hydraulic oil passes through the multi-way directional valves (16), a bidirectional hydraulic lock (15) is opened, enters four hydraulic support leg oil cylinders (14), after the support leg oil cylinders are pushed out to touch the ground, a support leg loop pressure sensor (33) is used for monitoring the pressure condition of the support leg loop, when the pressure of the support leg loop reaches a set value, the support leg loop pressure sensor (33) feeds back signals, the four multi-way directional valves (16) sequentially return to the middle position function, the bidirectional hydraulic lock (15) is locked, and then a transverse moving mechanism moves the horizontal moving platform to the middle position of a protection object;

then, a middle upright post amplitude-variable oil cylinder (1) and a longitudinal beam amplitude-variable oil cylinder (13) extend out simultaneously, the middle upright post amplitude-variable oil cylinder (1) extends out to drive a middle upright post to lift and drive a protective device to lift simultaneously, a cylinder body of the middle upright post oil cylinder (1) is fixed on a horizontal moving platform, a section of a piston rod is connected to the middle upright post, the front end and the rear end of the piston rod are connected in a rotatable mode, the longitudinal beam amplitude-variable oil cylinder (13) is consistent with the middle upright post oil cylinder in a connection mode and used for controlling the horizontal posture of a longitudinal beam to rise, and the two oil cylinders are double-cylinder synchronous lifting, namely two middle upright post oil cylinders and two longitudinal beam amplitude-variable oil cylinders;

after the middle upright post and the longitudinal beam are lifted in place, the beam assembly rotating oil cylinder (34) is used for rotating the beam assemblies at the two ends of the longitudinal beam, the first upright post rotating oil cylinder (341) and the second upright post rotating oil cylinder (342) are used for rotating the first upright post and the second upright post, and after the first upright post and the second upright post rotate in place, other non-hydraulic driving actuators complete subsequent telescopic actions, and finally the building is completed.

Technical Field

The invention belongs to the field of hydraulic transmission, and particularly relates to a distributed hydraulic system applied to railway crossing protective equipment.

Background

At present, the mileage of railway lines in China is continuously increased, newly built railways are gradually put into operation, the construction for crossing the existing railway lines is more frequent, and the construction for crossing the railway lines comprises the steps of crossing the railway by high-voltage lines, crossing the railway by highways, crossing the railway by station lines and the like. The mechanization of the crossing railway equipment is a research hotspot at present, aiming at the separated railway crossing protective equipment, the traditional hydraulic transmission system can not meet the requirements of special equipment with large span, multiple actuating mechanisms and the like, and the whole railway hydraulic system which can adapt to the separated railway protective equipment structure is urgently needed to be designed.

Disclosure of Invention

The invention aims to provide a distributed hydraulic system applied to railway crossing protective equipment, which is used for solving the problems.

The purpose of the invention can be realized by the following technical scheme:

a distributed hydraulic system applied to railway crossing protective equipment comprises a combined type vehicle-mounted hydraulic system adopting variable pump load sensing and constant pump remote pressure regulation, a protective device hydraulic system adopting a power electric transmission closed type electric hydrostatic actuator and a controller for controlling the combined type vehicle-mounted hydraulic system and the protective device hydraulic system, wherein the vehicle-mounted hydraulic system comprises a force bearing platform horizontal moving module, a hydraulic support leg module, a middle upright amplitude changing module and an amplitude changing longitudinal beam module, and the protective device hydraulic system comprises a beam assembly rotating module;

the bearing platform horizontal moving module, the hydraulic support leg module, the middle upright post amplitude changing module, the longitudinal beam amplitude changing module and the cross beam assembly rotating module are all in communication connection with the controller, and vehicle-mounted construction work is completed according to preset actions in the controller in sequence.

Furthermore, the force bearing platform horizontal movement module comprises two single-side parallel double-cylinder loops connected with the main oil way, wherein the single-side parallel double-cylinder loops are sequentially provided with a horizontal push-out loop bidirectional hydraulic lock, a one-way throttle valve and a three-position four-way electromagnetic directional valve in the direction from the horizontal push-out oil cylinder to the main oil way; an oil outlet and an oil return port at one end of the horizontal push-out loop bidirectional hydraulic lock are respectively communicated with a rod cavity and a rodless cavity of the horizontal push-out oil cylinder, an oil inlet and an oil outlet at the other end of the horizontal push-out loop bidirectional hydraulic lock are respectively communicated with one ends of two one-way throttle valves, the other ends of the two one-way throttle valves are respectively communicated with an A, B oil port of the three-position four-way electromagnetic directional valve, a P oil port of the three-position four-way electromagnetic directional valve is connected with a high-pressure main oil way in a main oil way, and a T oil port is connected with an oil return way in the main oil way.

Furthermore, the oil inlet and the oil outlet of the horizontal push-out oil cylinder loop are provided with pressure sensors.

Furthermore, the hydraulic support leg module comprises a force bearing support leg oil cylinder, a support leg loop multi-way directional valve, a support leg loop bidirectional hydraulic lock and a support leg loop pressure sensor, wherein the force bearing support leg oil cylinder is controlled by the support leg multi-way directional valve, the support leg loop bidirectional hydraulic lock and the support leg loop pressure sensor are arranged on an oil path between A, B oil ports of the force bearing support leg oil cylinder and the support leg multi-way directional valve, and a P, T oil port of the support leg loop multi-way directional valve is respectively connected with a high-pressure main oil path in the main oil path and an oil return oil path in the main oil path.

Furthermore, the middle upright amplitude module comprises a middle upright amplitude oil cylinder, an oil inlet and an oil outlet of the middle upright amplitude oil cylinder are respectively communicated with one end of an amplitude loop explosion-proof valve, the other end of the amplitude loop explosion-proof valve is communicated with one end of a balance valve, the other end of the balance valve is communicated with the middle upright loop multi-way directional valve, an oil inlet of the middle upright loop multi-way directional valve is communicated with a high-pressure main oil way in the main oil way, and the oil outlet is communicated with an oil return oil way in the main oil way.

Furthermore, two amplitude-variable oil cylinder pressure sensors are arranged on an oil way through which an oil inlet and an oil return port of the amplitude-variable oil cylinder of the middle upright post are communicated with the explosion-proof valve.

Furthermore, the longitudinal beam amplitude changing module comprises a longitudinal beam amplitude changing oil cylinder, an oil inlet and an oil outlet of the longitudinal beam amplitude changing oil cylinder are respectively communicated with one end of an amplitude changing loop explosion-proof valve, the other end of the amplitude changing loop explosion-proof valve is communicated with one end of a balance valve, the other end of the balance valve is communicated with a longitudinal beam amplitude changing loop multi-way reversing valve, an oil inlet of the longitudinal beam amplitude changing loop multi-way reversing valve is communicated with a high-pressure main oil way in the main oil way, and an oil outlet of the longitudinal beam amplitude changing loop multi-way reversing valve is communicated with an oil returning way in the main oil way.

Furthermore, two amplitude-variable oil cylinder pressure sensors are arranged on an oil path for communicating an oil inlet and an oil return port of the longitudinal beam amplitude-variable oil cylinder with the longitudinal beam amplitude-variable explosion-proof valve.

Further, the beam assembly rotation module comprises a beam assembly rotation oil cylinder, a one-way throttle valve, a one-way filter, a motor, a hydraulic pump, an oil tank, an overflow valve, an oil return filter, a flow matching valve and a beam balance valve, wherein the oil inlet and the oil return port of the beam assembly rotation oil cylinder are respectively connected with the beam balance valve and the one-way throttle valve, the beam balance valve and the one-way throttle valve are communicated with one end of the one-way filter, the other end of the one-way filter is communicated with one end of the hydraulic pump and one end of the flow matching valve, the other end of the flow matching valve is communicated with the oil tank, and the other end of the hydraulic pump is fixedly connected with the output end of the motor.

Further, the work of building on the vehicle is accomplished according to predetermineeing the action in the controller in proper order, include:

the controller controls the two-position three-way electromagnetic directional valve and the two-position two-way electromagnetic directional valve to be switched to the right position, the variable pump is switched to work as the fixed displacement pump, the three-position four-way electromagnetic directional valve is switched to the right position, the one-way throttle valve adjusts the pushing speed of the oil cylinder, the pressure sensor of the horizontal pushing loop monitors the pressure condition of the loop, the four horizontal pushing oil cylinders are respectively pushed out to two sides to push the bearing support and the hydraulic support oil cylinder to two sides of the equipment, when the four horizontal pushing oil cylinders stretch out to the right position, the two-position three-way electromagnetic directional valve and the two-position two-way electromagnetic directional valve are switched to the left position, the three-position four-way electromagnetic directional valve is switched to the middle position, the variable pump is switched back to the variable pump by the fixed displacement pump, the horizontal pushing loop stops oil feeding, the two-way hydraulic lock is locked, the horizontal pushing oil cylinder is locked, and the horizontal moving module of the bearing platform is built;

then, four multi-way reversing valves of a hydraulic support leg loop are opened, the multi-way reversing valves are switched to the left position from the middle position, high-pressure hydraulic oil passes through the multi-way reversing valves, a bidirectional hydraulic lock is opened, enters four hydraulic support leg oil cylinders, the support leg oil cylinders are pushed out to be in contact with the ground, a support leg loop pressure sensor is used for monitoring the pressure condition of the support leg loop, when the pressure of the support leg loop reaches a set value, the support leg loop pressure sensor feeds back signals, the four multi-way reversing valves sequentially return to the middle position, the bidirectional hydraulic lock is locked, and then a transverse moving mechanism moves the horizontal moving platform to the middle position of a protection object;

then, a middle upright post amplitude-variable oil cylinder and a longitudinal beam amplitude-variable oil cylinder extend out simultaneously, the middle upright post amplitude-variable oil cylinder extends out to drive the middle upright post to lift, and meanwhile, a protective device is driven to lift, a cylinder body of the middle upright post oil cylinder is fixed on a horizontal moving platform, a section of a piston rod is connected to the middle upright post, the front end and the rear end of the piston rod are connected in a rotatable mode, the longitudinal beam amplitude-variable oil cylinder is consistent with the middle upright post oil cylinder in a connection mode and used for controlling the horizontal posture of the longitudinal beam to lift, and the two oil cylinders are double-cylinder synchronous lifting, namely two middle upright post oil cylinders and two longitudinal beam amplitude-variable oil cylinders;

after the middle stand column and the longitudinal beam are lifted in place, the beam assembly rotating oil cylinder is used for rotating the beam assemblies at the two ends of the longitudinal beam, the first stand column rotating oil cylinder and the second stand column rotating oil cylinder are used for rotating the first stand column and the second stand column, and after the first stand column rotating oil cylinder and the second stand column rotating oil cylinder rotate to the proper positions, other non-hydraulic driving actuators complete follow-up stretching actions, and finally building is completed.

Compared with the prior art, the invention has the beneficial effects that:

a distributed hydraulic system applied to railway crossing protective equipment meets the functional requirements of a multi-actuating mechanism hydraulic system of the separated railway crossing protective equipment, and aiming at the structural characteristics of the separated railway crossing protective equipment, the designed hydraulic system consists of a vehicle-mounted hydraulic system and a protective device electro-hydrostatic actuator hydraulic system, wherein the vehicle-mounted hydraulic system consists of a variable load sensitive and quantitative remote pressure regulating system, the protection device adopts a power-electricity transmission type electric hydrostatic actuator driving mode, replaces a common oil pipeline with a cable, the combined type whole vehicle hydraulic system can be quickly separated, and the working efficiency of equipment is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an onboard hydraulic system;

FIG. 2 is a schematic diagram of the hydraulic system of the guard;

FIG. 3 is a block diagram of a railway crossing protection installation;

fig. 4 is a diagram of the position of the hydraulic actuator of the guard.

In the figure: 1. a middle upright post amplitude-variable oil cylinder; 2. a variable amplitude oil cylinder pressure sensor; 3. an amplitude-variable loop explosion-proof valve; 4. a balancing valve; 5. the multi-way valve is connected with a pressure reducing valve in series; 6. a filter; 7. the multi-way valve is connected with a two-position two-way reversing valve; 8. controlling an oil way unloading valve; 9. controlling an oil way overflow valve in a first-joint mode; 10. the middle upright post loop multi-way reversing valve; 11. a multi-way valve pressure regulating valve; 12. the longitudinal beam amplitude-variable loop multi-way reversing valve; 13. a longitudinal beam amplitude-variable oil cylinder; 14. a force-bearing support oil cylinder; 15. a support leg loop bidirectional hydraulic lock; 16. a support leg loop multi-way reversing valve; 17. a variable displacement pump; 18. a motor; 19. switching a ball valve; 20. an oil inlet filter; 21. an oil tank; 22. an oil return filter; 23. a two-position three-way electromagnetic directional valve; 24. a two-position two-way electromagnetic directional valve; 25. an overflow valve; 26. a liquid level meter; 27. an air cleaner; 28. a one-way throttle valve; 29. a three-position four-way electromagnetic directional valve; 30. a horizontal push-out loop bidirectional hydraulic lock; 31. horizontally pushing out the oil cylinder; 32. a horizontal push-out loop pressure sensor; 33. a leg loop pressure sensor; 34. the beam component rotates the oil cylinder; 341. a first upright post rotating cylinder; 342. a second upright post rotary oil cylinder; 35. a one-way throttle valve; 36. a one-way filter; 37. a motor; 38. a hydraulic pump; 39. an oil tank; 40. an overflow valve; 41. an oil return filter; 42. a flow matching valve; 43. and a beam balance valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

The embodiment of the invention provides a distributed hydraulic system applied to railway crossing protective equipment as shown in figures 1-4, which comprises a combined type vehicle-mounted hydraulic system adopting variable pump load sensing and constant pump remote pressure regulation, a protective device hydraulic system adopting a power electric transmission closed type electric hydrostatic actuator and a controller for controlling the combined type vehicle-mounted hydraulic system and the protective device hydraulic system, wherein the vehicle-mounted hydraulic system comprises a bearing platform horizontal moving module, a hydraulic support leg module, a middle upright amplitude module and a longitudinal beam amplitude module, and the protective device hydraulic system comprises a cross beam assembly rotating module;

the bearing platform horizontal moving module, the hydraulic support leg module, the middle upright post amplitude changing module, the longitudinal beam amplitude changing module and the cross beam assembly rotating module are all in communication connection with the controller, and vehicle-mounted construction work is completed according to preset actions in the controller in sequence;

in specific implementation, the vehicle-mounted hydraulic system comprises a main oil path arranged on the rail car, the main oil path comprises an oil tank 21, a variable pump 17 communicated with the oil tank 21 and an oil return filter 22, and more preferably, in order to provide a stable high-pressure oil path for the main oil path, an oil inlet filter 20, a switch ball valve 19, a liquid level meter 26 and an air filter 27 are further sequentially arranged between the variable pump 17 and the oil tank 21;

a high-pressure main oil way is formed between the oil tank 21 and the variable pump 17, an oil return way is formed between the oil tank 21 and the oil return filter 22, and the outlet main oil way of the variable pump 17 in the high-pressure main oil way is respectively used for supplying high-pressure oil to a multi-way valve group loop (the multi-way valve group loop refers to three loops including a middle upright post loop multi-way reversing valve 10, a longitudinal beam amplitude-changing loop multi-way reversing valve 12 and a support leg loop multi-way reversing valve 16, namely a middle upright post amplitude-changing loop, a longitudinal beam amplitude-changing loop and a support leg loop) and a switch valve group loop (the loop refers to a bearing platform horizontal moving loop); the oil tank 21 and the oil return filter 22 form an oil return path, wherein the multi-path valve group loop and the switch valve group loop are both connected with the oil return filter 22 to complete oil return.

The vehicle-mounted hydraulic system comprises a bearing platform horizontal moving module, a hydraulic support leg module, a middle upright post amplitude changing module and a longitudinal beam amplitude changing module, wherein the working modules sequentially act in the process of building and disassembling the equipment, and build work of a vehicle is completed in a matching mode. The vehicle-mounted hydraulic system is a force bearing platform which controls the action of an actuating mechanism in the system jointly by a variable pump 17, a load sensitive multi-way valve, various switch valves and a servo valve;

in specific implementation, the action of the force bearing platform horizontal movement module is driven by four horizontal push-out oil cylinders 31, two horizontal push-out oil cylinders 31 are respectively arranged on the left side and the right side of the movement direction of the equipment and respectively control the left side and the right side of the protective equipment to move, a horizontal push-out oil cylinder loop consists of a two-position three-way electromagnetic directional valve 23, a two-position two-way electromagnetic directional valve 24 and an overflow valve 25, two three-position four-way electromagnetic directional valves 29, a horizontal push-out loop bidirectional hydraulic lock 30 and a horizontal push-out loop pressure sensor 32, four one-way throttle valves 28 and the horizontal push-out oil cylinders 31, when the horizontal push-out loop works, the variable pump 17 is controlled by the two-position three-way electromagnetic directional valve 23 and the two-position two-way electromagnetic directional valve 24 and is switched to be quantitative by variable switching to stably drive the horizontal push-out oil cylinder 31 to be pushed out or retracted, and after the oil cylinders are stretched to the right position, the two-position three-position electromagnetic directional valve 23 and the two-position two-way electromagnetic directional valve 24 are switched, the pump is switched from a fixed displacement pump to a variable displacement pump, and more specifically, the bearing platform horizontal movement module comprises two single-side parallel double-cylinder loops, wherein the single-side parallel double-cylinder loops are sequentially provided with a bidirectional hydraulic lock 30, a one-way throttle valve 28, a three-position four-way electromagnetic directional valve 29 and a two-position two-way electromagnetic directional valve 24 from a horizontal push-out oil cylinder to an oil source direction; an oil outlet and an oil return port at one end of a bidirectional hydraulic lock 30 are respectively communicated with a rod cavity and a rodless cavity of a horizontal push-out oil cylinder, an oil inlet and an oil outlet at the other end of the bidirectional hydraulic lock 30 are communicated with one ends of two one-way throttle valves 28, the other ends of the two one-way throttle valves 28 are respectively communicated with an A, B oil port of a three-position four-way electromagnetic directional valve, a P oil port of the three-position four-way electromagnetic directional valve is connected with a high-pressure main oil way, a T oil port is connected with an oil return oil way, a two-position three-way electromagnetic directional valve 23 is in a left normally open state, an oil port of the three-way oil port is connected with the high-pressure main oil way, an oil port of the three-way oil port is connected with a load sensitive feedback oil way, an oil port of the three-way oil port is connected with a variable pump variable piston control port, a two-position two-way electromagnetic directional valve 24 is in a left normally closed state, an oil port of the two-way oil port is connected with a horizontal push-out high-pressure main oil way, an overflow valve is connected with an oil inlet, and the two-position three-way electromagnetic directional valve 23 and the two-position electromagnetic directional valve 24 are used for controlling the quantitative and variable pump 17 to switch.

The hydraulic support leg module comprises a force bearing support leg oil cylinder 14, a support leg loop multi-way reversing valve 16, a support leg loop two-way hydraulic lock 15 and eight support leg loop pressure sensors 33, wherein the extension of a single hydraulic support leg is independently controlled by the single support leg multi-way reversing valve 16, so that the single support leg can be independently adjusted, the support leg loop two-way hydraulic lock 15 is used for locking the support leg loop after the support leg is extended in place, the bearing capacity condition of the support leg is kept, the support leg loop pressure sensors 33 are used for monitoring the pressure change of the loop, and the hydraulic support leg module works after the force bearing platform is horizontally moved, more specifically, the hydraulic support leg module comprises a force bearing support leg oil cylinder 14, a support leg loop multi-way reversing valve 16, a support leg loop two-way hydraulic lock 15 and a horizontal push-out loop pressure sensor 33, wherein the force bearing support leg oil cylinder 14 is controlled by the support leg multi-way reversing valve 16, the force bearing support leg oil cylinder 14 and the A of the support leg multi-way reversing valve 16, And an oil passage between the oil ports B is provided with a support leg loop bidirectional hydraulic lock 15 and a horizontal push-out loop pressure sensor 33, and the P, T oil ports of the support leg loop multi-way directional control valve 16 are respectively connected with a high-pressure main oil passage and an oil return passage.

The amplitude variation motion of the middle upright amplitude variation module and the longitudinal beam amplitude variation module is realized by the extension motion of the hydraulic support leg, and after the working platform moves to a proper building position, the middle upright amplitude variation module lifts the protective device and needs to work together with the longitudinal beam amplitude variation loop in the lifting process, the longitudinal beam amplitude variation oil cylinder is used for maintaining the protective device to keep horizontal lifting in the lifting process, so that serious accidents such as overturning and the like caused by overlarge change of the gravity center are avoided, the middle upright amplitude variation loop and the longitudinal beam amplitude variation loop are synchronously lifted by double cylinders at two sides of a truss, the running stability of the equipment is improved, the two loops are respectively and independently controlled by a multi-way reversing valve, the two loops are relatively critical working loops in a vehicle-mounted system, so that a pressure sensor and an explosion-proof valve are arranged in each loop, and the pipeline burst accident caused by overlarge load or other extreme conditions is avoided, the execution component of the intermediate upright amplitude module is two intermediate upright amplitude oil cylinders 1 which can simultaneously stretch, the oil inlets and the oil outlets of the two intermediate upright amplitude oil cylinders 1 are provided with four amplitude loop explosion-proof valves 3, the oil path connecting the amplitude loop explosion-proof valves 3 and the multi-way valve is provided with two balance valves 4 for maintaining the motion stability of the execution mechanism oil cylinder, the oil inlet and the oil return path of the intermediate upright amplitude oil cylinder 1 are provided with two amplitude cylinder pressure sensors 2, more specifically, the intermediate upright amplitude module comprises an intermediate upright amplitude oil cylinder, the oil inlet and the oil outlet of the intermediate upright amplitude oil cylinder 1 are respectively communicated with one end of the amplitude loop explosion-proof valve 3, the other end of the amplitude loop explosion-proof valve 3 is communicated with one end of the balance valve 4, the other end of the balance valve 4 is communicated with the oil path connecting the multi-way valve, the oil inlet of the single intermediate upright amplitude oil cylinder 1, the oil inlet of the amplitude loop explosion-proof valve 3, the oil outlet of the single intermediate upright amplitude loop explosion-proof valve is communicated with the oil cylinder 1, the oil outlet of the single intermediate upright amplitude loop explosion-proof valve is communicated with the oil cylinder, and the oil path, Two amplitude-variable oil cylinder pressure sensors 2 are arranged on an oil path of which an oil return port is communicated with an amplitude-variable loop explosion-proof valve 3, the component arrangement of a longitudinal beam amplitude-variable loop is the same as that of a middle upright post amplitude-variable loop, the two loops are respectively and independently controlled by corresponding multi-way valves,

the longitudinal beam amplitude-variable module comprises a longitudinal beam amplitude-variable oil cylinder 13, an oil inlet and an oil outlet of the longitudinal beam amplitude-variable oil cylinder 13 are respectively communicated with one end of an amplitude-variable loop explosion-proof valve 3, the other end of the amplitude-variable loop explosion-proof valve 3 is communicated with one end of a balance valve 4, the other end of the balance valve 4 is communicated with an oil way connected with a multi-way valve, and two amplitude-variable oil cylinder pressure sensors 2 are arranged on the oil way communicated with the explosion-proof valve through the oil inlet and the oil return port of the longitudinal beam amplitude-variable oil cylinder 13.

The protection device hydraulic system adopts an Electric Hydrostatic Actuator (EHA) closed hydraulic system, and transmits driving energy to the EHA in a power electricity transmission mode so as to complete corresponding action requirements, the EHA hydraulic system consists of a beam assembly rotary oil cylinder 34, a one-way throttle valve 35, a one-way filter 36, a motor 37, a hydraulic pump 38, an oil tank 39, an overflow valve 40, an oil return filter 41, a flow matching valve 42 and a beam balance valve 43, concretely, the protection device electric hydrostatic actuator hydraulic system comprises the beam assembly rotary oil cylinder 34, the hydraulic system is a closed hydraulic system, an oil inlet and an oil return port of the beam assembly rotary oil cylinder 34 are respectively connected with the balance valve 43 and the one-way throttle valve 35, the two one-way filters 36 are used for filtering impurities in system oil, one end of the flow matching valve 42 is connected with the oil tank 39, and the other end automatically replenishes oil to the system according to the oil replenishing requirements of the system, the structural actions of the three positions of the beam assembly rotating oil cylinder 34, the first upright post rotating oil cylinder 341 and the second upright post rotating oil cylinder 342 all adopt the same hydraulic schematic diagram, namely, an electric hydrostatic actuator, because the positions of the oil cylinders in the protective device are far away, and the railway crossing protective device adopts a separated frame structure, the actuator oil cylinder at the tail end of the system is slow in reaction due to a long pipeline, difficult to control and inconvenient to rapidly break away from, and the electric drive small-sized closed hydraulic system is adopted to adapt to the requirements of the device.

The cross member rotating cylinders 34 are used for rotating the cross member at both ends of the longitudinal member, and the first column rotating cylinder 341 and the second column rotating cylinder 342 are used for rotating the first column and the second column. The motor 37 and the hydraulic pump 38 provide a power source for a closed type electro-hydrostatic actuator hydraulic system, the one-way throttle valves 35 and 43 are used for controlling the stability of the oil cylinder during extending or retracting movement, the two one-way filters 36 are used for filtering impurities in the closed type system and cleaning oil in the system, the two overflow valves 40 are used for controlling the pressure of oil paths of a rod cavity and a rodless cavity, and the flow matching valve 42 is used for automatically compensating the flow difference between the rod cavity and the rodless cavity when the asymmetric oil cylinder extends or retracts. The number of the rotary oil cylinders at different positions in the protection device can be determined according to the requirement without limitation.

Because the disconnect-type special construction of equipping, so single oil source formula pipeline hydraulic system can't adapt to this demand of equipping, equips span, structure size and space and occupies all great, adopts the form of power telex not only can realize breaking away from fast, high-efficient operation, still can avoid because the pipeline breaks away from a series of unnecessary problems such as fluid polluted environment that probably produces, equips the in-process of launching to build, and whole car hydraulic system's work flow is as follows:

the controller controls the two-position three-way electromagnetic directional valve 23 and the two-position two-way electromagnetic directional valve 24 to be switched to the right position, the variable pump 17 is switched to work as a fixed displacement pump, the three-position four-way electromagnetic directional valve 29 is switched to the right position, the one-way throttle valve 28 regulates the push-out speed of the oil cylinder, the horizontal push-out loop pressure sensor 32 monitors the pressure condition of the loop, the four horizontal push-out oil cylinders 31 are respectively pushed out to two sides to push the force-bearing support and the hydraulic support oil cylinder 14 to two sides of the device, when the four horizontal pushing-out oil cylinders 14 extend to the right position, the two-position three-way electromagnetic directional valve 23 and the two-position two-way electromagnetic directional valve 24 are switched to the left position, the three-position four-way electromagnetic directional valve 29 is switched to the middle position, the variable pump 17 is switched back to the variable pump by the fixed displacement pump, the horizontal pushing-out loop stops oil feeding, meanwhile, the bidirectional hydraulic lock 30 is locked, the horizontal push-out oil cylinder 14 is locked, and the construction of the horizontal moving module of the bearing platform is completed;

then, four multi-way directional valves 16 of the hydraulic support leg loop are opened, the hydraulic support leg loop is converted to the left position from the middle position function, high-pressure hydraulic oil passes through the multi-way directional valves 16, the two-way hydraulic lock 15 is opened, enters the four hydraulic support leg oil cylinders 14, the support leg oil cylinders are pushed out to be in contact with the ground, the support leg loop pressure sensor 33 is used for monitoring the pressure condition of the support leg loop, when the support leg loop pressure reaches a set value, the support leg loop pressure sensor 33 feeds back signals, the four multi-way directional valves 16 sequentially return to the middle position function, the two-way hydraulic lock 15 is locked, and then the horizontal moving platform is moved to the middle position of a protection object by the transverse moving mechanism;

then, the middle upright post amplitude-variable oil cylinder 1 and the longitudinal beam amplitude-variable oil cylinder 13 extend out simultaneously, the middle upright post amplitude-variable oil cylinder 1 extends out to drive the middle upright post to lift, and simultaneously drive the protective device to lift, the cylinder body of the middle upright post oil cylinder 1 is fixed on a horizontal moving platform, one section of a piston rod is connected to the middle upright post, the front end and the rear end are rotatably connected, the longitudinal beam amplitude-variable oil cylinder 13 is consistent with the middle upright post oil cylinder in a connection mode and used for controlling the horizontal posture of the longitudinal beam to lift, and the two oil cylinders are double-cylinder synchronous lifting, namely two middle upright post oil cylinders and two longitudinal beam amplitude-variable oil cylinders;

after the middle upright post and the longitudinal beam are lifted in place, the beam assembly rotating oil cylinder 34 is used for rotating the beam assemblies at the two ends of the longitudinal beam, the first upright post rotating oil cylinder 341 and the second upright post rotating oil cylinder 342 are used for rotating the first upright post and the second upright post, and after the first upright post and the second upright post rotate to the proper positions, other non-hydraulic drive actuators complete subsequent telescopic actions, and finally the building is completed.

In conclusion, the hydraulic system meets the functional requirements of a multi-execution-mechanism hydraulic system of the split type railway crossing protective equipment, and is characterized in that the designed hydraulic system consists of a vehicle-mounted hydraulic system and a hydraulic system of an electric hydrostatic actuator of the protective device, the vehicle-mounted hydraulic system consists of a variable load sensitive and quantitative remote pressure regulating system, switching is performed according to different stage functional requirements, certain reference can be provided for the combined multi-execution-mechanism engineering mechanical hydraulic system, the protective device adopts a power electric transmission electric hydrostatic actuator driving mode, a common oil pipeline is replaced by a cable, driving is provided more efficiently, meanwhile, the split type structural characteristics of the crossing protective equipment are matched, the combined type whole vehicle hydraulic system can be separated rapidly, and the working efficiency of the equipment is effectively improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art; the preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.