A rocket launching platform swing lever hydraulic system

Abstract

The present application relates to a kind of rocket launching platform swing rod hydraulic system, including oil pumping unit, swing rod drive unit and latch drive unit, oil pumping unit includes oil tank, variable pump and oil pressure master control valve, oil tank is connected with oil return pipe, variable pump is connected with main oil pipe, the oil inlet and oil return of oil pressure master control valve are connected with main oil pipe and oil return pipe, the working oil port of oil pressure master control valve is connected with oil return pipe after being connected with first overflow valve, the working oil port of oil pressure master control valve is connected with oil return pipe after being connected with second overflow valve, swing rod drive unit includes swing rod master control valve and swing rod cylinder, the oil inlet and oil return of swing rod master control valve are connected with main oil pipe and oil return pipe, two working oil ports of swing rod master control valve are connected with the positive and negative chambers of swing rod cylinder by first oil path and second oil path, latch drive unit includes swing back latch circuit and swing open latch circuit.It has the advantages of simple structure, convenient control, good safety, high reliability, strong practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to a hydraulic system, in particular to a hydraulic system for automatic locking of a swing rod opening and closing and a latch of a rocket launching platform. BACKGROUND

[0002] In the field of aerospace, the swing rod is an important part of the rocket launching platform, which is used to support the fuel filling pipeline of the rocket body, electronic sensors, connecting cables and the like. Before the rocket ignites and takes off, the swing rod needs to be quickly swung open and take the dropped connector and other auxiliary facilities to a safe position, so as to reserve enough safety distance for the rocket to take off. For some types of carrier rockets, due to the complex swing rod truss structure, long horizontal direction, large rotational inertia and high installation position, higher requirements are put forward for the hydraulic system for controlling the swing rod opening and closing. At the same time, in order to ensure that the swing rod does not hit the rocket due to shaking under the influence of high-altitude wind load, the swing rod should have the ability to keep the position when it is swung back to embrace the rocket, which requires designing a reliable hydraulic drive latch for the swing rod. However, the hydraulic system currently used in the field is designed for relatively small swing rods, which cannot meet the safety requirements of the above swing rod. SUMMARY

[0003] The present application relates to a hydraulic system, in particular to a hydraulic system for automatic locking of a swing rod opening and closing and a latch of a rocket launching platform.

[0004] In order to solve the above problems in the prior art, the present application provides a rocket launching platform swing rod hydraulic system, which comprises an oil pumping unit, a swing rod driving unit and a latch driving unit, the oil pumping unit comprises an oil tank, a variable pump and an oil pressure main control valve, the oil tank is connected with an oil return pipe, the input port of the variable pump is connected with the oil tank, the output port of the variable pump is connected with a main oil delivery pipe, the oil pressure main control valve is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the oil pressure main control valve are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, the working oil port one of the oil pressure main control valve is connected with the oil return pipe through a pipeline after being connected with a first overflow valve, the working oil port two of the oil pressure main control valve is connected with the oil return pipe through a pipeline after being connected with a second overflow valve, the swing rod driving unit comprises a swing rod main control valve and a swing rod oil cylinder, the swing rod main control valve is a proportional directional valve, the oil inlet and the oil return port of the swing rod main control valve are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a constant difference pressure reducing valve is arranged on the pipeline connected with the oil inlet of the swing rod main control valve, the two working oil ports of the swing rod main control valve are connected with the positive and negative cavities of the swing rod oil cylinder through a first oil path and a second oil path, a first balance valve and a second balance valve are respectively arranged on the first oil path and the second oil path, the latch driving unit comprises a swing back latch circuit and a swing open latch circuit, the swing back latch circuit comprises a swing back latch control valve and a swing back latch oil cylinder, the swing back latch control valve is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the swing back latch control valve are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a first speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing back latch control valve, the two working oil ports of the swing back latch control valve are connected with the positive and negative cavities of the swing back latch oil cylinder through a third oil path and a fourth oil path, a third balance valve and a fourth balance valve are respectively arranged on the third oil path and the fourth oil path, the swing open latch circuit comprises a swing open latch main control valve and a swing open latch oil cylinder, the swing open latch main control valve is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the swing open latch main control valve are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a second speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing open latch main control valve, the two working oil ports of the swing open latch main control valve are connected with the positive and negative cavities of the swing open latch oil cylinder through a fifth oil path and a sixth oil path, a fifth balance valve and a sixth balance valve are respectively arranged on the fifth oil path and the sixth oil path.

[0005] Further, the present application provides a rocket launching platform swing rod hydraulic system, wherein the oil pumping unit further comprises a constant displacement pump and an oil pressure backup control valve, the input port of the constant displacement pump is connected with the oil tank, the output port of the constant displacement pump is connected with the main oil delivery pipe through a secondary oil delivery pipe, the oil pressure backup control valve is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the oil pressure backup control valve are respectively connected with the secondary oil delivery pipe and the oil return pipe through pipelines, the working oil port one of the oil pressure backup control valve is connected with the oil return pipe through a pipeline after being connected with a third overflow valve, the working oil port two of the oil pressure backup control valve is connected with the oil return pipe through a pipeline after being connected with a fourth overflow valve.

[0006] Further, the application discloses a swing rod hydraulic system of a rocket launching platform, wherein the swing rod driving unit further comprises a swing rod backup valve, the swing rod backup valve is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve are connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, a third speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing rod backup valve, the third speed regulating valve is connected with a fourth speed regulating valve in parallel, the fourth speed regulating valve is connected with an electromagnetic valve in series, the two working oil outlets of the swing rod backup valve are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are correspondingly provided with a seventh balance valve and an eighth balance valve.

[0007] Further, the application discloses a swing rod hydraulic system of a rocket launching platform, wherein the swing rod driving unit further comprises a swing rod backup valve, the swing rod backup valve is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve are connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, a third speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing rod backup valve, the third speed regulating valve is connected with a fourth speed regulating valve in parallel, the fourth speed regulating valve is connected with an electromagnetic valve in series, the two working oil outlets of the swing rod backup valve are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are correspondingly provided with a seventh balance valve and an eighth balance valve.

[0008] Further, the application discloses a swing rod hydraulic system of a rocket launching platform, wherein the swing rod driving unit further comprises a swing rod backup valve, the swing rod backup valve is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve are connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, a third speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing rod backup valve, the third speed regulating valve is connected with a fourth speed regulating valve in parallel, the fourth speed regulating valve is connected with an electromagnetic valve in series, the two working oil outlets of the swing rod backup valve are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are correspondingly provided with a seventh balance valve and an eighth balance valve.

[0009] Further, the application discloses a swing rod hydraulic system of a rocket launching platform, wherein the swing rod driving unit further comprises a swing rod backup valve, the swing rod backup valve is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve are connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, a third speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing rod backup valve, the third speed regulating valve is connected with a fourth speed regulating valve in parallel, the fourth speed regulating valve is connected with an electromagnetic valve in series, the two working oil outlets of the swing rod backup valve are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are correspondingly provided with a seventh balance valve and an eighth balance valve.

[0010] Further, the application discloses a swing rod hydraulic system of a rocket launching platform, wherein the swing rod driving unit further comprises a swing rod backup valve, the swing rod backup valve is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve are connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, a third speed regulating valve is arranged on the pipeline connected with the oil inlet of the swing rod backup valve, the third speed regulating valve is connected with a fourth speed regulating valve in parallel, the fourth speed regulating valve is connected with an electromagnetic valve in series, the two working oil outlets of the swing rod backup valve are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are correspondingly provided with a seventh balance valve and an eighth balance valve.

[0011] Further, the application discloses a rocket launching platform swing rod hydraulic system, wherein the first oil path and the second oil path are provided with a first pressure sensor and a second pressure sensor respectively, and one side of the swing rod cylinder is provided with a first extension limit switch and a first retraction limit switch.

[0012] Further, the application discloses a rocket launching platform swing rod hydraulic system, wherein the third oil path and the fourth oil path are provided with a third pressure sensor and a fourth pressure sensor respectively, one side of the swing back plug cylinder is provided with a second extension limit switch and a second retraction limit switch, the fifth oil path and the sixth oil path are provided with a fifth pressure sensor and a sixth pressure sensor respectively, and one side of the swing open plug cylinder is provided with a third extension limit switch and a third retraction limit switch.

[0013] Further, the application discloses a rocket launching platform swing rod hydraulic system, wherein the main oil pipe is provided with a seventh pressure sensor, the second one-way valve is arranged between the seventh pressure sensor and the first filter, the connection point of the auxiliary oil pipe and the main oil pipe is arranged between the seventh pressure sensor and the second one-way valve, the oil return pipe is provided with an oil filter and a flowmeter, and the plug driving unit further comprises a seventh one-way valve, an eighth one-way valve and a ninth one-way valve, the seventh one-way valve is arranged on a pipeline connected with the swing back plug control valve return port, the eighth one-way valve is arranged on a pipeline connected with the swing open plug main control valve return port, and the ninth one-way valve is arranged on a pipeline connected with the swing open plug backup control valve return port.

[0014] Compared with the prior art, the rocker arm hydraulic system of a rocket launch platform of the present invention has the following advantages: the present invention sets an oil pumping unit, a rocker arm driving unit and a latch driving unit, so that the oil pumping unit is provided with an oil tank, a variable pump and an oil pressure main control valve, wherein the oil tank is connected with an oil return pipe, the input port of the variable pump is connected with the oil tank, the output port of the variable pump is connected with the main oil supply pipe, the oil pressure main control valve is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the oil pressure main control valve are respectively connected with the main oil supply pipe and the oil return pipe through pipelines, and the working oil port of the oil pressure main control valve is connected with the first overflow port through a pipeline. After the valve is connected, it is connected to the return oil pipe, and the working oil port 2 of the oil pressure main control valve is connected to the second overflow valve through a pipeline and then connected to the return oil pipe; the rocker drive unit is provided with a rocker main control valve and a rocker cylinder, wherein the rocker main control valve is a proportional directional valve, and the oil inlet and oil return port of the rocker main control valve are connected to the main oil supply pipe and the return oil pipe respectively through pipelines, and a differential pressure reducing valve is set on the pipeline connected to the oil inlet of the rocker main control valve, and the two working oil ports of the rocker main control valve are connected to the positive and negative chambers of the rocker cylinder through the first oil circuit and the second oil circuit in a one-to-one correspondence, and a first balancing valve is correspondingly set on the first oil circuit and the second oil circuit. and a second balancing valve; the latch drive unit is provided with a swing-back latch circuit and a swing-open latch circuit, and the swing-back latch circuit is provided with a swing-back latch control valve and a swing-back latch oil cylinder, wherein the swing-back latch control valve is a three-position four-way electromagnetic reversing valve, and the oil inlet and return port of the swing-back latch control valve are respectively connected to the main oil supply pipe and the return oil pipe through pipelines, and a first speed regulating valve is provided on the pipeline connected to the oil inlet of the swing-back latch control valve, and the two working oil ports of the swing-back latch control valve are connected to the positive and negative cavities of the swing-back latch oil cylinder one by one through the third oil circuit and the fourth oil circuit, and the third oil circuit and the fourth oil circuit are respectively connected to the oil supply pipe and the return oil pipe. A third balancing valve and a fourth balancing valve should be provided, so that the swing latch circuit is provided with a swing latch main control valve and a swing latch oil cylinder. The swing latch main control valve is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return port of the swing latch main control valve are connected to the main oil supply pipe and oil return pipe respectively through pipelines. A second speed regulating valve is provided on the pipeline connected to the oil inlet of the swing latch main control valve. The two working oil ports of the swing latch main control valve are connected to the positive and negative chambers of the swing latch oil cylinder through the fifth and sixth oil circuits in a one-to-one correspondence. A fifth balancing valve and a sixth balancing valve are provided on the fifth and sixth oil circuits respectively. This constitutes a rocket launch platform swing arm hydraulic system with a simple structure, convenient control, good safety, high reliability, and strong practicality.In actual application, the swing rod is hinged on the launching tower through a rotating shaft, and two ends of the swing rod oil cylinder are hinged on the launching tower and the swing rod, so that the swing rod can be driven to rotate through the extension and retraction of the swing rod oil cylinder, wherein the rotation of the swing rod towards the rocket is swing back, and the rotation of the swing rod away from the rocket is swing open; the piston rod of the swing back latch oil cylinder and the swing open latch oil cylinder is connected with the swing back latch and the swing open latch, so that the swing back latch and the swing open latch can be correspondingly driven to move through the extension and retraction of the swing back latch oil cylinder and the swing open latch oil cylinder, so as to insert the swing back latch and the swing open latch into the corresponding lock holes or pull them out of the corresponding lock holes, wherein the swing back latch is used to insert into the corresponding lock hole after the swing rod is swung back to the position, so that the swing rod can be kept in a stable state at the position, and the swing open latch is used to insert into the corresponding lock hole after the swing rod is swung open to the position, so that the swing rod can be kept in a stable state at the position.The present application sets up an oil pressure master control circuit composed of a variable pump, an oil pressure master control valve, a first overflow valve, a second overflow valve and related pipelines by setting up an oil liquid pumping unit, on the one hand, the variable pump adjusts the output flow according to the proportional signal, realizing stepless adjustment of the oil liquid flow, improving the control precision and convenience, on the other hand, the oil pressure master control valve is connected with the overflow valves of different pressures, realizing accurate control of the oil pressure, also improving the control precision and convenience, the specific process of the oil pressure control is that the first overflow valve set as high pressure is connected by the oil pressure master control valve, the oil pressure of the main oil pipe only releases pressure when it is higher than the set pressure of the first overflow valve, ensuring the demand of the swing rod driving unit for high pressure oil liquid, the second overflow valve set as low pressure is connected by the oil pressure master control valve, the oil pressure of the main oil pipe releases pressure when it is higher than the set pressure of the second overflow valve, ensuring the demand of the latch driving unit for low pressure oil liquid; by setting the swing rod master control valve and the constant difference pressure reducing valve in the swing rod driving unit, the oil circuit on-off and the oil liquid flow direction can be controlled conveniently and quickly, then the extension and retraction action of the swing rod oil cylinder is controlled, and the swing rod oil cylinder continuously variable speed is realized by proportionally adjusting the oil liquid flow, by setting the first balance valve and the second balance valve, the swing rod oil cylinder action instability caused by load change can be effectively prevented, and the overflow protection function is realized when the oil circuit pressure is too large, improving the stability and safety; by setting the swing back latch circuit and the swing open latch circuit in the latch driving unit, the convenience of controlling the swing back latch and the swing open latch is improved, by setting the swing back latch control valve in the swing back latch circuit, the oil circuit on-off and the oil liquid flow direction can be controlled conveniently and quickly, then the extension and retraction action of the swing back latch oil cylinder is controlled, by setting the first speed regulating valve to adjust the oil liquid flow, the accurate control of the swing back latch oil cylinder piston rod movement speed is realized, by setting the third balance valve and the fourth balance valve, the stability of the swing back latch oil cylinder piston rod movement is ensured, and the swing back latch oil cylinder has the reliable holding ability of the piston rod in the stop state, by setting the swing open latch master control valve in the swing open latch circuit, the oil circuit on-off and the oil liquid flow direction can be controlled conveniently and quickly, then the extension and retraction action of the swing open latch oil cylinder is controlled, by setting the second speed regulating valve to adjust the oil liquid flow, the accurate control of the swing open latch oil cylinder piston rod movement speed is realized, by setting the fifth balance valve and the sixth balance valve, the stability of the swing open latch oil cylinder piston rod movement is ensured, and the swing open latch oil cylinder has the reliable holding ability of the piston rod in the stop state.

[0015] The present application is a kind of rocket launch platform swing rod hydraulic system, and the specific implementation will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structure schematic diagram of the present application, a kind of rocket launch platform swing rod hydraulic system;

[0017] Fig. 2 It is a structure schematic diagram of the oil liquid pumping unit in the present application.

[0018] Fig. 3 Structure diagram of the pin driving unit in the application;

[0019] Fig. 4 Structure diagram of the pin driving unit in the application. DETAILED DESCRIPTION

[0020] First of all, it needs to be pointed out that the up, down, left, right, front, back and other directional words described in the application are only described according to the drawings for the purpose of understanding, and not to limit the technical solutions and the scope of protection of the application.

[0021] As Figs. 1 to 4The specific embodiment of the rocket launching platform swing rod hydraulic system of the present application shown includes an oil pumping unit 1, a swing rod driving unit 2 and a latch driving unit 3. The oil pumping unit 1 is provided with an oil tank 11, a variable pump 12 and an oil pressure master control valve 13, wherein the oil tank 11 is connected with an oil return pipe, the input port of the variable pump 12 is connected with the oil tank 11, the output port of the variable pump 12 is connected with a main oil delivery pipe, and the oil pressure master control valve 13 is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return ports of the oil pressure master control valve 13 are respectively connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, the working oil port one of the oil pressure master control valve 13 is connected with the oil return pipe through a pipeline connected with a first overflow valve 14, and the working oil port two of the oil pressure master control valve 13 is connected with the oil return pipe through a pipeline connected with a second overflow valve 15. The swing rod driving unit 2 is provided with a swing rod master control valve 21 and a swing rod cylinder 22, and the swing rod master control valve 21 is a proportional directional valve. The oil inlet and oil return ports of the swing rod master control valve 21 are respectively connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, and a constant difference pressure reducing valve 23 is arranged on the pipeline connected with the oil inlet port of the swing rod master control valve 21. The two working oil ports of the swing rod master control valve 21 are connected with the positive and negative cavities of the swing rod cylinder 22 through a first oil path and a second oil path, and a first balance valve 24 and a second balance valve 25 are respectively arranged on the first oil path and the second oil path. The latch driving unit 3 is provided with a swing back latch circuit and a swing open latch circuit. The swing back latch circuit is provided with a swing back latch control valve 31 and a swing back latch cylinder 32, wherein the swing back latch control valve 31 is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return ports of the swing back latch control valve 31 are respectively connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, and a first speed regulating valve 33 is arranged on the pipeline connected with the oil inlet port of the swing back latch control valve 31. The two working oil ports of the swing back latch control valve 31 are connected with the positive and negative cavities of the swing back latch cylinder 32 through a third oil path and a fourth oil path, and a third balance valve 34 and a fourth balance valve 35 are respectively arranged on the third oil path and the fourth oil path. The swing open latch circuit is provided with a swing open latch master control valve 36 and a swing open latch cylinder 37, and the swing open latch master control valve 36 is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return ports of the swing open latch master control valve 36 are respectively connected with the main oil delivery pipe and the oil return pipe through corresponding pipelines, and a second speed regulating valve 38 is arranged on the pipeline connected with the oil inlet port of the swing open latch master control valve 36. The two working oil ports of the swing open latch master control valve 36 are connected with the positive and negative cavities of the swing open latch cylinder 37 through a fifth oil path and a sixth oil path, and a fifth balance valve 39 and a sixth balance valve 310 are respectively arranged on the fifth oil path and the sixth oil path.

[0022] The above setting constitutes a rocket launching platform swing lever hydraulic system with simple structure, convenient control, good safety, high reliability and strong practicality. In actual application, the swing lever is hinged on the launching tower through the rotating shaft, and the two ends of the swing lever oil cylinder 22 are hinged on the launching tower and the swing lever. Thus, the extension and retraction of the swing lever oil cylinder 22 can drive the swing lever to rotate. The rotation of the swing lever towards the rocket is swing back, and the rotation of the swing lever away from the rocket is swing open. The piston rods of the swing back latch oil cylinder 32 and the swing open latch oil cylinder 37 are connected with the swing back latch and the swing open latch, respectively. Thus, the extension and retraction of the swing back latch oil cylinder 32 and the swing open latch oil cylinder 37 can drive the swing back latch and the swing open latch to move, so that the swing back latch and the swing open latch are inserted into or extracted from the corresponding lock holes. The swing back latch is used to be inserted into the corresponding lock hole after the swing lever is swung back to the position, so that the swing lever remains in a stable state at the position. The swing open latch is used to be inserted into the corresponding lock hole after the swing lever is swung open to the position, so that the swing lever remains in a stable state at the position.The present application sets up the oil pressure master control circuit composed of the variable pump 12, the oil pressure master control valve 13, the first overflow valve 14, the second overflow valve 15 and the related pipeline through the oil liquid pumping unit 1, on the one hand, the variable pump 12 adjusts the output flow according to the proportional signal, realizes the stepless adjustment of the oil liquid flow, improves the control precision and the convenience, on the other hand, the oil pressure master control valve 13 is connected with the overflow valve of different pressure, realizes the accurate control of the oil pressure, also improves the control precision and the convenience, the specific process of the oil pressure control is, the first overflow valve 14 set as high pressure is connected by the oil pressure master control valve 13, the oil pressure of the main oil pipe only can be released when it is higher than the set pressure of the first overflow valve 14, guarantees the demand of the swing rod driving unit 2 to the high pressure oil liquid, the second overflow valve 15 set as low pressure is connected by the oil pressure master control valve 13, the oil pressure of the main oil pipe can be released when it is higher than the set pressure of the second overflow valve 15, guarantees the demand of the bolt driving unit 3 to the low pressure oil liquid, the swing rod driving unit 2 sets the swing rod master control valve 21 and the constant difference pressure reducing valve 23, and the swing rod master control valve 21 adopts the proportional directional valve, can conveniently and quickly control the oil circuit on-off and the oil flow direction, further controls the extension and retraction action of the swing rod oil cylinder 22, and can proportionally adjust the oil flow to make the swing rod oil cylinder 22 continuously variable speed, by setting the first balance valve 24 and the second balance valve 25, can effectively prevent the swing rod oil cylinder 22 from being unstable due to load change, and can play the overflow protection role when the oil circuit pressure is too large, improves the stability and the safety, the bolt driving unit 3 sets the swing back bolt circuit and the swing open bolt circuit, improves the convenience of controlling the swing back bolt and the swing open bolt, the swing back bolt circuit sets the swing back bolt control valve 31, can conveniently and quickly control the oil circuit on-off and the oil flow direction, further controls the extension and retraction action of the swing back bolt oil cylinder 32, by setting the first speed regulating valve 33 to adjust the oil flow, realizes the accurate control of the swing back bolt oil cylinder 32 piston rod movement speed, by setting the third balance valve 34 and the fourth balance valve 35, guarantees the stability of the swing back bolt oil cylinder 32 piston rod movement, and makes the swing back bolt oil cylinder 32 have the reliable holding ability of the piston rod in the stop state, guarantees the stable reliability of the swing rod in the swing back to position state, the swing open bolt circuit sets the swing open bolt master control valve 36, can conveniently and quickly control the oil circuit on-off and the oil flow direction, further controls the extension and retraction action of the swing open bolt oil cylinder 37, by setting the second speed regulating valve 38 to adjust the oil flow, realizes the accurate control of the swing open bolt oil cylinder 37 piston rod movement speed, by setting the fifth balance valve 39 and the sixth balance valve 310, guarantees the stability of the swing open bolt oil cylinder 37 piston rod movement, and makes the swing open bolt oil cylinder 37 have the reliable holding ability of the piston rod in the stop state, guarantees the stable reliability of the swing rod in the swing open to position state.It should be noted that the launching tower, the swing rod, the swing-in and swing-out pins are all components of the rocket launching platform, and their structures, principles and connection modes with the hydraulic system are well known to those skilled in the art, and will not be described here.

[0023] As an optimization scheme, the oil liquid pumping unit 1 is also provided with an oil pressure backup circuit composed of the constant pump 16, the oil pressure backup valve 17, the third overflow valve 18, the fourth overflow valve 19 and related pipelines, which, in combination with the oil pressure main control circuit, forms an oil source redundant control structure, improving the reliability and safety of the oil liquid pumping unit 1 and the entire system. The specific setting mode of the oil pressure backup circuit is that the input port of the constant pump 16 is connected with the oil tank 11, the output port of the constant pump 16 is connected with the main oil supply pipe through the auxiliary oil supply pipe, the oil pressure backup valve 17 is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the oil pressure backup valve 17 are connected with the auxiliary oil supply pipe and the oil return pipe through pipelines respectively, the working oil port one of the oil pressure backup valve 17 is connected with the oil return pipe through a pipeline after connecting the third overflow valve 18, and the working oil port two of the oil pressure backup valve 17 is connected with the oil return pipe through a pipeline after connecting the fourth overflow valve 19. When the oil pressure main control circuit fails, the oil pressure backup circuit is started to enable the system to operate normally. Specifically, the constant pump 16 is started, the third overflow valve 18 set to high pressure is connected through the oil pressure backup valve 17, and the oil pressure of the auxiliary oil supply pipe and the main oil supply pipe will only be relieved when it is higher than the set pressure of the third overflow valve 18, thereby ensuring the demand of the swing rod driving unit 2 for high pressure oil liquid, and the fourth overflow valve 19 set to low pressure is connected through the oil pressure backup valve 17, and the oil pressure of the auxiliary oil supply pipe and the main oil supply pipe will be relieved as long as it is higher than the set pressure of the fourth overflow valve 19, thereby ensuring the demand of the pin driving unit 3 for low pressure oil liquid. In order to enhance the safety and reliability of the oil liquid pumping unit 1 and the entire hydraulic system, the oil liquid pumping unit 1 is also provided with a first safety valve 110 and a second safety valve 111, wherein the oil inlet and the oil outlet of the first safety valve 110 are connected with the main oil supply pipe and the oil return pipe through pipelines respectively, and the oil inlet and the oil outlet of the second safety valve 111 are connected with the auxiliary oil supply pipe and the oil return pipe through pipelines respectively. When the oil pressure of the main oil supply pipe exceeds the set pressure of the first safety valve 110 when the oil pressure main control circuit is working, the first safety valve 110 will automatically open to relieve pressure, and when the oil pressure of the auxiliary oil supply pipe exceeds the set pressure of the second safety valve 111 when the oil pressure backup circuit is working, the second safety valve 111 will automatically open to relieve pressure, which can effectively prevent accidents caused by excessive oil pressure and improve safety and reliability.

[0024] In practical application, the first one-way valve 112, the first filter 113 and the second one-way valve 114 are arranged on the main oil pipe in sequence, and the first filter 113 is connected with the third one-way valve 115 in parallel, wherein the connection points of the oil pressure main control valve 13 and the first safety valve 110 with the main oil pipe are located between the first filter 113 and the second one-way valve 114. The first one-way valve 112 and the second one-way valve 114 can prevent the oil in the main oil pipe from flowing backward, ensuring the system safety, and the first filter 113 can filter out the impurities in the oil, ensuring the oil cleanliness and the system stability, and when the first filter 113 is blocked, the oil can flow through the bypass third one-way valve 115. Similarly, the fourth one-way valve 116, the second filter 117 and the fifth one-way valve 118 are arranged on the auxiliary oil pipe in sequence, and the second filter 117 is connected with the sixth one-way valve 119 in parallel, wherein the connection points of the oil pressure standby control valve 17 and the second safety valve 111 with the auxiliary oil pipe are located between the second filter 117 and the fifth one-way valve 118. The fourth one-way valve 116 and the fifth one-way valve 118 can prevent the oil in the auxiliary oil pipe from flowing backward, also ensuring the system safety, the second filter 117 can filter out the impurities in the oil, also ensuring the oil cleanliness and the system stability, and when the second filter 117 is blocked, the oil can flow through the bypass sixth one-way valve 119. In order to facilitate the measurement of the oil pressure of the main oil pipe, the seventh pressure sensor 120 is arranged on the main oil pipe, and the second one-way valve 114 is located between the seventh pressure sensor 120 and the first filter 113. In order to ensure that the oil pressure main control circuit and the oil pressure standby control circuit operate independently, the connection point of the auxiliary oil pipe with the main oil pipe is located between the seventh pressure sensor 120 and the second one-way valve 114.

[0025] As an optimization scheme, the specific embodiment adds a swing rod backup control valve 26 to the swing rod driving unit 2, and the swing rod backup control valve 26 adopts a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, so as to control the on-off and oil flow direction of the oil circuit. The oil inlet and oil return of the swing rod backup control valve 26 are connected to the main oil supply pipe and the oil return pipe through the pipelines, respectively. The pipeline connected to the oil inlet of the swing rod backup control valve 26 is provided with a third speed regulating valve 27. The third speed regulating valve 27 is connected in parallel with a fourth speed regulating valve 28, and the fourth speed regulating valve 28 is connected in series with an electromagnetic valve 29. The two working oil ports of the swing rod backup control valve 26 are connected to the first oil circuit and the second oil circuit through the seventh oil circuit and the eighth oil circuit, respectively. The seventh oil circuit and the eighth oil circuit are provided with a seventh balance valve 210 and an eighth balance valve 211, respectively. This structure forms a swing rod backup control loop composed of the swing rod backup control valve 26, the third speed regulating valve 27, the fourth speed regulating valve 28, the electromagnetic valve 29, the seventh balance valve 210, the eighth balance valve 211 and the related pipelines, in combination with a swing rod main control loop composed of the swing rod main control valve 21, the constant-difference pressure reducing valve 23, the first balance valve 24, the second balance valve 25 and the related pipelines, to form a swing rod redundant control structure. When the swing rod main control loop fails, the swing rod backup control loop can be used to make the system operate normally, thereby improving the reliability and safety of the swing rod driving unit 2 and the entire system. At the same time, the third speed regulating valve 27 and the fourth speed regulating valve 28 are connected in parallel, and the fourth speed regulating valve 28 is connected in series with the electromagnetic valve 29, which is beneficial to different speed regulation of the third speed regulating valve 27 and the fourth speed regulating valve 28, and the on-off of the oil circuit of the fourth speed regulating valve 28 is controlled through the electromagnetic valve 29, so as to realize the rapid switching of the two speed grades of the swing rod oil cylinder 22 and improve the control convenience. When the electromagnetic valve 29 is powered on, the piston rod of the swing rod oil cylinder 22 moves rapidly, and when the electromagnetic valve 29 is powered off, the piston rod of the swing rod oil cylinder 22 moves slowly. Similarly, the first balance valve 24 and the second balance valve 25, the seventh balance valve 210 and the eighth balance valve 211 can effectively prevent the swing rod oil cylinder 22 from moving unstably due to load changes, and can play an overflow protection role when the oil circuit pressure is too large, thereby improving the stability and safety.In actual application, in order to facilitate the pressure of the positive and negative cavities of the swing lever oil cylinder 22, the first pressure sensor 212 and the second pressure sensor 213 are correspondingly arranged on the first oil path and the second oil path; in order to accurately determine whether the swing lever action (swing open and swing back) is in place, the first extension to position travel switch 214 and the first collection to position travel switch 215 are arranged on one side of the swing lever oil cylinder 22, when the first extension to position travel switch 214 triggers a signal, it indicates that the piston rod of the swing lever oil cylinder 22 has been extended to position, accordingly, it indicates that the swing lever has been swung back to position, at this time, the swing back bolt is inserted into the corresponding lock hole, so that the swing lever can keep the stability of the swing back to position state, when the first collection to position travel switch 215 triggers a signal, it indicates that the piston rod of the swing lever oil cylinder 22 has been collected to position, accordingly, it indicates that the swing lever has been swung open to position, at this time, the swing open bolt is inserted into the corresponding lock hole, so that the swing lever can keep the stability of the swing open to position state. In order to filter out the sundries in the return oil, so as to ensure the cleanliness of the oil in the oil tank 11, the oil filter 121 is arranged on the return oil pipe, and the flow meter 122 is arranged on the return oil pipe to monitor the return oil flow.

[0026] As an optimization scheme, the present embodiment adds a swing-open plug backup control valve 311 to the swing-open plug circuit, and uses a three-position four-way electromagnetic reversing valve for the swing-open plug backup control valve 311 to control the oil passage and the oil flow direction, wherein the oil inlet and the oil return of the swing-open plug backup control valve 311 are connected to the main oil supply pipe and the oil return pipe through the corresponding pipelines, a fifth speed regulating valve 312 is arranged on the pipeline connected to the oil inlet of the swing-open plug backup control valve 311, and the two working oil ports of the swing-open plug backup control valve 311 are connected to the fifth oil passage and the sixth oil passage through the ninth oil passage and the tenth oil passage, and the ninth balance valve 313 and the tenth balance valve 314 are arranged on the ninth oil passage and the tenth oil passage. This structure forms a swing-open plug redundant control structure by arranging a swing-open plug backup control circuit composed of the swing-open plug backup control valve 311, the fifth speed regulating valve 312, the ninth balance valve 313, the tenth balance valve 314 and the related pipelines, in combination with a swing-open plug main control circuit composed of the swing-open plug main control valve 36, the swing-open plug main control valve 36, the fifth balance valve 39, the sixth balance valve 310 and the related pipelines, so that the system can normally operate when the swing-open plug main control circuit fails, and the reliability and safety of the plug driving unit 3 and the whole system are improved. At the same time, the present application adjusts the oil flow by arranging the fifth speed regulating valve 312, so as to realize accurate control of the movement speed of the swing-open plug oil cylinder 37 piston rod. Similarly, by arranging the ninth balance valve 313 and the tenth balance valve 314, the stability of the swing-open plug oil cylinder 37 piston rod movement is ensured, and the swing-open plug oil cylinder 37 has the reliable holding ability of the piston rod in the stop state, so as to ensure the stability of the swing-open plug in the swing-open position. In order to improve the control convenience and enhance the safety and reliability, the present embodiment also arranges a first on-off valve 315 and a second on-off valve 316 which are both two-position three-way electromagnetic reversing valves in the swing-open plug circuit, wherein the first on-off valve 315 is arranged on the pipeline connected to the oil inlet of the swing-open plug main control valve 36, and the second on-off valve 316 is arranged on the pipeline connected to the oil inlet of the swing-open plug backup control valve 311. This arrangement controls the on-off of the corresponding oil passage through the first on-off valve 315 and the second on-off valve 316, so as to improve the fault isolation ability. It should be noted that the first on-off valve 315 is arranged on the pipeline connected to the oil inlet of the swing-open plug main control valve 36, which means that the oil inlet and the working oil port of the first on-off valve 315 are connected in series to the pipeline connected to the oil inlet of the swing-open plug main control valve 36, and the oil return of the first on-off valve 315 is connected in parallel to the pipeline connected to the oil return of the swing-open plug main control valve 36; similarly, the second on-off valve 316 is arranged on the pipeline connected to the oil inlet of the swing-open plug backup control valve 311, which means that the oil inlet and the working oil port of the second on-off valve 316 are connected in series to the pipeline connected to the oil inlet of the swing-open plug backup control valve 311, and the oil return of the second on-off valve 316 is connected in parallel to the pipeline connected to the oil return of the swing-open plug backup control valve 311.

[0027] In practical application, in order to facilitate the measurement of the pressure of the positive and negative cavities of the swing-back plug cylinder 32, the third pressure sensor 317 and the fourth pressure sensor 318 are arranged on the third oil path and the fourth oil path; in order to accurately determine whether the extension and retraction action of the swing-back plug cylinder 32 is in place, the second extension-to-place travel switch 319 and the second retraction-to-place travel switch 320 are arranged on one side of the swing-back plug cylinder 32; when the second extension-to-place travel switch 319 triggers a signal, it indicates that the piston rod of the swing-back plug cylinder 32 has been extended to place, and accordingly, it indicates that the swing-back plug has been inserted into the corresponding lock hole; when the second retraction-to-place travel switch 320 triggers a signal, it indicates that the piston rod of the swing-back plug cylinder 32 has been retracted to place, and accordingly, it indicates that the swing-back plug has been pulled out of the corresponding lock hole. Similarly, in order to facilitate the measurement of the pressure of the positive and negative cavities of the swing-open plug cylinder 37, the fifth pressure sensor 321 and the sixth pressure sensor 322 are arranged on the fifth oil path and the sixth oil path; in order to accurately determine whether the extension and retraction action of the swing-open plug cylinder 37 is in place, the third extension-to-place travel switch 323 and the third retraction-to-place travel switch 324 are arranged on one side of the swing-open plug cylinder 37; when the third extension-to-place travel switch 323 triggers a signal, it indicates that the piston rod of the swing-open plug cylinder 37 has been extended to place, and accordingly, it indicates that the swing-open plug has been inserted into the corresponding lock hole; when the third retraction-to-place travel switch 324 triggers a signal, it indicates that the piston rod of the swing-open plug cylinder 37 has been retracted to place, and accordingly, it indicates that the swing-open plug has been inserted into the corresponding lock hole. In order to prevent oil from flowing backward and improve safety and reliability, the plug driving unit 3 is also provided with the seventh one-way valve 325, the eighth one-way valve 326 and the ninth one-way valve 327, wherein the seventh one-way valve 325 is arranged on the pipeline connected with the oil return port of the swing-back plug control valve 31, the eighth one-way valve 326 is arranged on the pipeline connected with the oil return port of the swing-open plug main control valve 36, and the ninth one-way valve 327 is arranged on the pipeline connected with the oil return port of the swing-open plug backup control valve 311. In order to ensure the cleanliness of the oil entering the plug driving unit 3, the third filter 328 is arranged on the pipeline connected with the oil inlet ports of the swing-back plug control valve 31, the swing-open plug main control valve 36 and the swing-open plug backup control valve 311, so as to filter out impurities in the oil.

[0028] The rocket launching platform swing lever hydraulic system provided by the application can produce the following beneficial effects: a) by designing a redundant oil source control circuit and using high and low pressure overflow valves to control the output oil pressure, the requirements of high pressure driving of the swing lever and low pressure driving of the latch are met, and the reliability and safety of the power source of the hydraulic system are improved; b) by using proportional directional valves and constant difference pressure reducing valves in the swing lever main control circuit, continuous adjustment of the extension and retraction action and movement speed of the swing lever oil cylinder piston rod is realized, and by setting swing lever oil cylinder positive and negative cavity bidirectional balance valves, the influence of load change on the extension and retraction speed of the swing lever oil cylinder is reduced; c) by setting speed regulating valves and electromagnetic valves in the swing lever standby control circuit, two-grade adjustment and conversion function of the extension and retraction speed of the swing lever oil cylinder is realized, and by setting a reversing in-place monitoring sensor in the swing lever standby control valve, monitoring of the valve core position is realized, which can ensure reliable work of the swing lever standby control circuit; d) by setting an oil inlet end speed regulating valve in the swing back latch circuit, control of the extension and retraction speed of the swing back latch oil cylinder is realized, by setting swing back latch oil cylinder positive and negative cavity bidirectional balance valves, the stability of the extension and retraction action of the swing back latch oil cylinder is ensured, and the swing back latch oil cylinder has reliable stop state maintaining capability, accordingly, the swing lever is in the stable and reliable swing back to position state by inserting the swing back latch into the corresponding lock hole; e) by setting a redundant structure composed of the swing open latch main control circuit and the swing open latch standby control circuit, the stability and reliability of the swing open latch circuit are improved, by setting an oil inlet end speed regulating valve in the swing open latch circuit, control of the extension and retraction speed of the swing open latch oil cylinder is realized, by setting swing open latch oil cylinder positive and negative cavity bidirectional balance valves, the stability of the extension and retraction action of the swing open latch oil cylinder is ensured, and the swing open latch oil cylinder has reliable stop state maintaining capability, accordingly, the swing lever is in the stable and reliable swing open to position state by inserting the swing open latch into the corresponding lock hole.

[0029] The above embodiments only describe the preferred embodiments of the application, and do not limit the protection scope of the application, and various modifications made by those skilled in the art according to the technical solutions of the application without departing from the design concept of the application shall fall within the protection scope of the claims of the application.

Claims

1. A hydraulic system of a rocket launching platform swing lever, comprising an oil pumping unit (1), a swing lever driving unit (2) and a latch driving unit (3), characterized in that, The oil liquid pumping unit (1) includes an oil tank (11), a variable pump (12) and an oil pressure master valve (13), the oil tank (11) is connected with an oil return pipe, the input port of the variable pump (12) is connected with the oil tank (11), the output port of the variable pump (12) is connected with a main oil delivery pipe, the oil pressure master valve (13) is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the oil pressure master valve (13) are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, the working oil port one of the oil pressure master valve (13) is connected with the oil return pipe through a pipeline connected with a first overflow valve (14), the working oil port two of the oil pressure master valve (13) is connected with the oil return pipe through a pipeline connected with a second overflow valve (15), the swing rod driving unit (2) includes a swing rod master valve (21) and a swing rod oil cylinder (22), the swing rod master valve (21) is a proportional directional valve, the oil inlet and the oil return of the swing rod master valve (21) are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a constant difference pressure reducing valve (23) is arranged on the pipeline connected with the oil inlet of the swing rod master valve (21), the two working oil ports of the swing rod master valve (21) are connected with the positive and negative cavities of the swing rod oil cylinder (22) through a first oil path and a second oil path, a first balance valve (24) and a second balance valve (25) are arranged on the first oil path and the second oil path, respectively, the latch driving unit (3) includes a swing back latch circuit and a swing open latch circuit, the swing back latch circuit includes a swing back latch control valve (31) and a swing back latch oil cylinder (32), the swing back latch control valve (31) is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the swing back latch control valve (31) are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a first speed regulating valve (33) is arranged on the pipeline connected with the oil inlet of the swing back latch control valve (31), the two working oil ports of the swing back latch control valve (31) are connected with the positive and negative cavities of the swing back latch oil cylinder (32) through a third oil path and a fourth oil path, a third balance valve (34) and a fourth balance valve (35) are arranged on the third oil path and the fourth oil path, respectively, the swing open latch circuit includes a swing open latch master valve (36) and a swing open latch oil cylinder (37), the swing open latch master valve (36) is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the swing open latch master valve (36) are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, a second speed regulating valve (38) is arranged on the pipeline connected with the oil inlet of the swing open latch master valve (36), the two working oil ports of the swing open latch master valve (36) are connected with the positive and negative cavities of the swing open latch oil cylinder (37) through a fifth oil path and a sixth oil path, a fifth balance valve (39) and a sixth balance valve (310) are arranged on the fifth oil path and the sixth oil path, respectively.

2. The hydraulic system for a rocket launch platform swing link according to claim 1, wherein, The oil liquid pumping unit (1) further comprises a constant pump (16) and an oil pressure backup valve (17), the input port of the constant pump (16) is connected with the oil tank (11), the output port of the constant pump (16) is connected with the main oil pipe through a secondary oil pipe, the oil pressure backup valve (17) is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the oil pressure backup valve (17) are respectively connected with the secondary oil pipe and the oil return pipe through pipelines, the working oil port one of the oil pressure backup valve (17) is connected with the oil return pipe through a pipeline connected with the third overflow valve (18), and the working oil port two of the oil pressure backup valve (17) is connected with the oil return pipe through a pipeline connected with the fourth overflow valve (19).

3. The hydraulic system of a rocket launcher platform swing lever according to claim 2, characterized in that, The swing rod driving unit (2) further comprises a swing rod backup valve (26), the swing rod backup valve (26) is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor, the oil inlet and the oil return of the swing rod backup valve (26) are respectively connected with the main oil pipe and the oil return pipe through pipelines, a third speed regulating valve (27) is arranged on the pipeline connected with the oil inlet of the swing rod backup valve (26), the third speed regulating valve (27) is connected in parallel with a fourth speed regulating valve (28), the fourth speed regulating valve (28) is connected in series with an electromagnetic valve (29), the two working oil ports of the swing rod backup valve (26) are connected with the first oil road and the second oil road in one-to-one correspondence through a seventh oil road and an eighth oil road, and the seventh oil road and the eighth oil road are respectively provided with a seventh balance valve (210) and an eighth balance valve (211).

4. The hydraulic system of a rocket launcher platform swing lever according to claim 3, characterized in that, The swing open plug circuit further comprises a swing open plug backup valve (311), the swing open plug backup valve (311) is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return of the swing open plug backup valve (311) are respectively connected with the main oil pipe and the oil return pipe through pipelines, a fifth speed regulating valve (312) is arranged on the pipeline connected with the oil inlet of the swing open plug backup valve (311), the two working oil ports of the swing open plug backup valve (311) are connected with the fifth oil road and the sixth oil road in one-to-one correspondence through a ninth oil road and a tenth oil road, and the ninth oil road and the tenth oil road are respectively provided with a ninth balance valve (313) and a tenth balance valve (314).

5. The hydraulic system of a rocket launcher platform swing lever according to claim 4, characterized in that, The swing open plug circuit further comprises a first on-off valve (315) and a second on-off valve (316), both of which are two-position three-way electromagnetic reversing valves, the first on-off valve (315) is arranged on the pipeline connected with the oil inlet of the swing open plug main control valve (36), and the second on-off valve (316) is arranged on the pipeline connected with the oil inlet of the swing open plug backup valve (311).

6. A hydraulic system for a rocket launch platform swing arm as defined in claim 5, wherein, The oil liquid pumping unit (1) further comprises a first safety valve (110) and a second safety valve (111), the oil inlet and the oil outlet of the first safety valve (110) are respectively connected with the main oil pipe and the oil return pipe through pipelines, and the oil inlet and the oil outlet of the second safety valve (111) are respectively connected with the secondary oil pipe and the oil return pipe through pipelines.

7. A hydraulic system for a rocket launch platform swing arm as defined in claim 6, wherein, The main oil pipe is sequentially provided with a first check valve (112), a first filter (113) and a second check valve (114), the first filter (113) is connected in parallel with a third check valve (115), the auxiliary oil pipe is sequentially provided with a fourth check valve (116), a second filter (117) and a fifth check valve (118), the second filter (117) is connected in parallel with a sixth check valve (119), the connection points of the oil pressure main control valve (13) and the first safety valve (110) with the main oil pipe are located between the first filter (113) and the second check valve (114), and the connection points of the oil pressure backup control valve (17) and the second safety valve (111) with the auxiliary oil pipe are located between the second filter (117) and the fifth check valve (118).

8. The hydraulic system of a rocket launcher platform swing lever according to claim 6, wherein, Corresponding first and second pressure sensors (212 and 213) are arranged on the first and second oil paths, and the swing rod oil cylinder (22) is provided on one side with a first extension-to-position travel switch (214) and a first retraction-to-position travel switch (215).

9. The hydraulic system of a rocket launcher platform swing lever according to claim 6, wherein, Corresponding third and fourth pressure sensors (317 and 318) are arranged on the third and fourth oil paths, and the swing back plug-in oil cylinder (32) is provided on one side with a second extension-to-position travel switch (319) and a second retraction-to-position travel switch (320); corresponding fifth and sixth pressure sensors (321 and 322) are arranged on the fifth and sixth oil paths, and the swing open plug-in oil cylinder (37) is provided on one side with a third extension-to-position travel switch (323) and a third retraction-to-position travel switch (324).

10. The hydraulic system of claim 6, wherein, A seventh pressure sensor (120) is arranged on the main oil pipe, the second check valve (114) is located between the seventh pressure sensor (120) and the first filter (113), the connection point of the auxiliary oil pipe with the main oil pipe is located between the seventh pressure sensor (120) and the second check valve (114), a filter (121) and a flowmeter (122) are arranged on the oil return pipe, and the plug-in drive unit (3) further includes a seventh check valve (325), an eighth check valve (326) and a ninth check valve (327), the seventh check valve (325) is arranged on a pipeline connected with the swing back plug-in control valve (31) oil return port, the eighth check valve (326) is arranged on a pipeline connected with the swing open plug-in main control valve (36) oil return port, and the ninth check valve (327) is arranged on a pipeline connected with the swing open plug-in backup control valve (311) oil return port.

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