Rocket launching platform swing rod hydraulic system

Abstract

The invention relates to a rocket launching platform swing rod hydraulic system which comprises an oil pumping unit, a swing rod driving unit and a bolt 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, and the variable pump is connected with a main oil feeding pipe. An oil inlet and an oil return opening of the oil pressure main control valve are correspondingly connected with the main oil feeding pipe and the oil return pipe, a first working oil opening of the oil pressure main control valve is connected with the first overflow valve and then connected with the oil return pipe, and a second working oil opening of the oil pressure main control valve is connected with the second overflow valve and then connected with the oil return pipe. An oil inlet and an oil return port of the swing rod main control valve are correspondingly connected with the main oil feeding pipe and the oil return pipe, two working oil ports of the swing rod main control valve are correspondingly connected with a positive cavity and a negative cavity of the swing rod oil cylinder through a first oil way and a second oil way in a one-to-one mode, and the plug pin driving unit comprises a swing-back plug pin loop and a swing-open plug pin loop. The device has the advantages of being simple in structure, convenient to control, good in safety, high in reliability and high in practicability.

Description

Technical Field

[0001] The invention relates to a hydraulic system, in particular to a hydraulic system for the opening and closing of a rocker arm and the automatic locking of a latch on a rocket launching platform. Background Art

[0002] In the aerospace field, the swing arm is an important part of the rocket launch platform, used to support the pipelines, electronic sensors, connecting cables, etc. for fuel filling the rocket body. Before the rocket ignites and takes off, the swing arm needs to be quickly swung open and take the detached connectors and other auxiliary facilities to a safe position to reserve enough safety distance for the rocket to take off. For some models of launch vehicles, due to the complex structure of the swing arm truss, the long horizontal direction, the large moment of inertia, and the high installation position, higher requirements are placed on the hydraulic system that controls the opening and closing of the swing arm. At the same time, in order to ensure that the swing arm will not hit the rocket body due to shaking under the influence of high-altitude wind loads, the swing arm should have the ability to maintain position when it is in the state of swinging back to hold the arrow. This requires the design of a sufficiently reliable hydraulic drive pin for the swing arm, but the hydraulic systems currently used in this field are designed for relatively small swing arms and cannot meet the safety requirements of the above-mentioned swing arms. Summary of the invention

[0003] The purpose of the present invention is to provide a rocket launch platform rocker arm hydraulic system, which has the advantages of simple structure, convenient control, good safety, high reliability and strong practicality.

[0004] In order to solve the above problems existing in the prior art, the present invention provides a rocket launch platform rocker arm hydraulic system, including an oil pumping unit, a rocker arm drive unit and a latch drive unit, the oil pumping unit includes an oil tank, a variable pump and an oil pressure main control valve, the oil tank is connected to an oil return pipe, the input port of the variable pump is connected to the oil tank, the output port of the variable pump is connected to a main oil delivery pipe, the oil pressure main control valve is a three-position four-way solenoid reversing valve, the oil inlet and oil return port of the oil pressure main control valve are respectively connected to the main oil delivery pipe and the oil return pipe through pipelines, and the working oil port of the oil pressure main control valve is connected to the main oil delivery pipe and the oil return pipe through pipelines. After the first overflow valve, 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 swing arm drive unit includes a swing arm main control valve and a swing arm oil cylinder. The swing arm main control valve is a proportional directional valve. The oil inlet and oil return port of the swing arm main control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A differential pressure reducing valve is arranged on the pipeline connected to the oil inlet of the swing arm main control valve. The two working oil ports of the swing arm main control valve are connected to the positive and negative chambers of the swing arm oil cylinder one by one through the first oil circuit and the second oil circuit. The first oil circuit and the second oil circuit are respectively provided with a first The balancing valve and the second balancing valve, the latch driving unit includes a swing-back latch circuit and a swing-open latch circuit, the swing-back latch circuit includes 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 oil return port of the swing-back latch control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a first speed regulating valve is arranged on the pipeline connected to the oil inlet of the swing-back latch control valve, the two working oil ports of the swing-back latch control valve are connected to the positive and negative chambers 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 positive and negative chambers of the swing-back latch oil cylinder. A third balancing valve and a fourth balancing valve are correspondingly provided on the upper side, the swing latch circuit includes a swing latch main control valve and a swing latch 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 respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a second speed regulating valve is provided on the pipeline connected to the oil inlet of the swing latch main control valve, and the two working oil ports of the swing latch main control valve are connected one by one with the positive and negative chambers of the swing latch cylinder through the fifth oil circuit and the sixth oil circuit, and a fifth balancing valve and a sixth balancing valve are correspondingly provided on the fifth oil circuit and the sixth oil circuit.

[0005] Furthermore, the present invention provides a rocker arm hydraulic system for a rocket launch platform, wherein the oil pumping unit also includes a metering pump and an oil pressure backup control valve, the input port of the metering pump is connected to the oil tank, the output port of the metering pump is connected to the main oil supply pipe through an auxiliary oil supply pipe, the oil pressure backup control valve is a three-position four-way solenoid reversing valve, the oil inlet and oil return port of the oil pressure backup control valve are respectively connected to the auxiliary oil supply pipe and the oil return pipe through pipelines, the working oil port 1 of the oil pressure backup control valve is connected to the third overflow valve through a pipeline and then connected to the oil return pipe, and the working oil port 2 of the oil pressure backup control valve is connected to the fourth overflow valve through a pipeline and then connected to the oil return pipe.

[0006] Furthermore, the present invention provides a rocket launch platform rocker hydraulic system, wherein the rocker drive unit also includes a rocker standby control valve, which is a three-position four-way solenoid reversing valve and is provided with a reversing in place monitoring sensor, the oil inlet and oil return port of the rocker standby control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, a third speed regulating valve is provided on the pipeline connected to the oil inlet of the rocker standby control valve, the third speed regulating valve is connected in parallel with a fourth speed regulating valve, the fourth speed regulating valve is connected in series with a solenoid valve, the two working oil ports of the rocker standby control valve are connected one-to-one with the first oil circuit and the second oil circuit through the seventh oil circuit and the eighth oil circuit, and the seventh oil circuit and the eighth oil circuit are correspondingly provided with a seventh balancing valve and an eighth balancing valve.

[0007] Furthermore, the present invention provides a rocker arm hydraulic system for a rocket launch platform, wherein the swing latch circuit also includes a swing latch standby control valve, which is a three-position four-way solenoid reversing valve, and the oil inlet and oil return port of the swing latch standby control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a fifth speed regulating valve is provided on the pipeline connected to the oil inlet of the swing latch standby control valve, and the two working oil ports of the swing latch standby control valve are connected to the fifth oil circuit and the sixth oil circuit one by one through the ninth oil circuit and the tenth oil circuit, and a ninth balancing valve and a tenth balancing valve are correspondingly provided on the ninth oil circuit and the tenth oil circuit.

[0008] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the swing latch circuit also includes a first on-off valve and a second on-off valve, both of which are two-position three-way electromagnetic reversing valves, the first on-off valve is arranged on a pipeline connected to the oil inlet of the swing latch main control valve, and the second on-off valve is arranged on a pipeline connected to the oil inlet of the swing latch standby control valve.

[0009] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the oil pumping unit also includes a first safety valve and a second safety valve, the oil inlet and oil outlet of the first safety valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and the oil inlet and oil outlet of the second safety valve are respectively connected to the auxiliary oil supply pipe and the oil return pipe through pipelines.

[0010] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the main oil supply pipe is sequentially provided with a first one-way valve, a first filter, and a second one-way valve, the first filter is connected in parallel with a third one-way valve, the auxiliary oil supply pipe is sequentially provided with a fourth one-way valve, a second filter, and a fifth one-way valve, the second filter is connected in parallel with a sixth one-way valve, the connection points of the oil pressure main control valve and the first safety valve with the main oil supply pipe are both located between the first filter and the second one-way valve, and the connection points of the oil pressure backup control valve and the second safety valve with the auxiliary oil supply pipe are both located between the second filter and the fifth one-way valve.

[0011] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the first oil circuit and the second oil circuit are correspondingly provided with a first pressure sensor and a second pressure sensor, and one side of the rocker arm cylinder is provided with a first extended position travel switch and a first received position travel switch.

[0012] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the third oil circuit and the fourth oil circuit are correspondingly provided with a third pressure sensor and a fourth pressure sensor, and one side of the swing-back latch cylinder is provided with a second extended position travel switch and a second received position travel switch; the fifth oil circuit and the sixth oil circuit are correspondingly provided with a fifth pressure sensor and a sixth pressure sensor, and one side of the swing-out latch cylinder is provided with a third extended position travel switch and a third received position travel switch.

[0013] Furthermore, the present invention provides a rocket launch platform rocker arm hydraulic system, wherein the main oil supply pipe is provided with a seventh pressure sensor, the second one-way valve is located between the seventh pressure sensor and the first filter, the connection point between the auxiliary oil supply pipe and the main oil supply pipe is located between the seventh pressure sensor and the second one-way valve, the oil return pipe is provided with an oil filter and a flow meter, the latch drive unit also includes 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 to the oil return port of the swing back latch control valve, the eighth one-way valve is arranged on a pipeline connected to the oil return port of the swing open latch main control valve, and the ninth one-way valve is arranged on a pipeline connected to the oil return port of the swing open latch standby control valve.

[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 arranges 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 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, and the working oil port of the oil pressure main control valve is connected with a first overflow port through a pipeline. The valve 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 swing arm drive unit is provided with a swing arm main control valve and a swing arm oil cylinder, wherein the swing arm main control valve is a proportional directional valve, and the oil inlet and oil return port of the swing arm main control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a differential pressure reducing valve is arranged on the pipeline connected to the oil inlet of the swing arm main control valve, and the two working oil ports of the swing arm main control valve are connected to the positive and negative chambers of the swing arm oil cylinder one by one through the first oil circuit and the second oil circuit, and a first balancing valve is correspondingly arranged on the first oil circuit and the second oil circuit. and a second balancing valve; the latch driving 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 oil return port of the swing-back latch control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a first speed regulating valve is arranged 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 chambers 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 connected to the oil inlet of the swing-back latch control valve. The third and fourth balancing valves should be provided, so that the swing latch circuit is provided with a swing latch main control valve and a swing latch oil cylinder, wherein the swing latch main control valve is a three-position four-way electromagnetic reversing valve, and the oil inlet and oil return port of the swing latch main control valve are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a second speed regulating valve is provided on the pipeline connected to the oil inlet of the swing latch main control valve, so that 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, and the fifth and sixth balancing valves are correspondingly provided on the fifth and sixth oil circuits. Thus, a rocket launch platform swing arm hydraulic system with simple structure, convenient control, good safety, high reliability and strong practicality is formed.In actual applications, the rocker arm is hinged on the launch tower through a rotating shaft, and the two ends of the rocker arm cylinder are correspondingly hinged on the launch tower and the rocker arm, so that the rocker arm can be driven to rotate by the extension and retraction action of the rocker arm cylinder, wherein the rotation action of the rocker arm toward the rocket is called swing back, and the rotation action of the rocker arm away from the rocket is called swing open, and the piston rods of the swing back latch cylinder and the swing open latch cylinder are correspondingly connected to 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 by the extension and retraction action of the swing back latch cylinder and the swing open latch cylinder, so that the swing back latch and the swing open latch can be inserted into the corresponding lock hole or pulled out from the corresponding lock hole, wherein the swing back latch is used to insert into the corresponding lock hole after the rocker arm is swung back into place, so that the rocker arm maintains a stable state at this position, and the swing open latch is used to insert into the corresponding lock hole after the rocker arm is swung open into place, so that the rocker arm maintains a stable state at this position.The present invention sets an oil pressure main control circuit composed of a variable pump, an oil pressure main control valve, a first relief valve, a second relief valve and related pipelines in an oil pumping unit. On the one hand, the variable pump adjusts the output flow according to the proportional signal, thereby realizing stepless regulation of the oil flow and improving control accuracy and convenience. On the other hand, the oil pressure main control valve is connected to the relief valves with different pressures, thereby realizing precise control of the oil pressure and also improving control accuracy and convenience. The specific process of oil pressure control is that the oil pressure main control valve is used to connect the first relief valve set to a high pressure, and the oil pressure in the main oil delivery pipe is only higher than that of the first relief valve. The pressure will be released only when the set pressure is reached, which ensures the high-pressure oil demand of the swing arm drive unit. The oil pressure main control valve is used to connect the second relief valve set to low pressure. As long as the oil pressure in the main oil pipe is higher than the set pressure of the second relief valve, the pressure will be released, which ensures the low-pressure oil demand of the latch drive unit. By setting the swing arm main control valve and the differential pressure reducing valve in the swing arm drive unit, the oil circuit on-off and the oil flow direction can be conveniently and quickly controlled, thereby controlling the extension and retraction action of the swing arm cylinder, and the oil flow rate can be proportionally adjusted to enable the swing arm cylinder to continuously change speed. By setting the first balancing valve and the second balancing valve, the swing arm cylinder can be effectively prevented from being overloaded due to load. The change causes unstable movement, and it can play an overflow protection role when the oil circuit pressure is too large, thereby improving stability and safety; by setting the swing-back latch circuit and the swing-open latch circuit in the latch drive 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 flow direction can be conveniently and quickly controlled, thereby controlling the extension and retraction action of the swing-back latch cylinder; by setting the first speed regulating valve to adjust the oil flow, accurate control of the movement speed of the piston rod of the swing-back latch cylinder is achieved; by setting the third balance valve and the fourth balance valve, the swing-back latch is guaranteed. The smoothness of the movement of the piston rod of the latch cylinder is ensured, and the swing-back latch cylinder has the ability to reliably keep the piston rod in a stopped state. By setting the swing-open latch main control valve in the swing-open latch circuit, the oil circuit on and off and the oil flow direction can be conveniently and quickly controlled, thereby controlling the extension and retraction of the swing-open latch cylinder. By setting the second speed regulating valve to adjust the oil flow, accurate control of the movement speed of the piston rod of the swing-open latch cylinder is achieved. By setting the fifth balance valve and the sixth balance valve, the smoothness of the movement of the piston rod of the swing-open latch cylinder is guaranteed, and the swing-open latch cylinder has the ability to reliably keep the piston rod in a stopped state.

[0015] A rocket launch platform rocker arm hydraulic system of the present invention is described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a rocker arm hydraulic system for a rocket launch platform of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the oil pumping unit in the present invention;

[0018] Figure 3 It is a structural schematic diagram of the swing rod driving unit in the present invention;

[0019] Figure 4 It is a structural schematic diagram of the latch drive unit in the present invention. DETAILED DESCRIPTION

[0020] First of all, it should be explained that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and the scope of protection of the present invention.

[0021] like Figures 1 to 4The specific implementation of the rocker arm hydraulic system of a rocket launch platform of the present invention is shown, comprising an oil pumping unit 1, a rocker arm 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 main 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 main control valve 13 is a three-position four-way electromagnetic reversing valve, the oil inlet and the oil return port of the oil pressure main control valve 13 are respectively connected with the main oil delivery pipe and the oil return pipe through pipelines, the working oil port 1 of the oil pressure main control valve 13 is connected with the first overflow valve 14 through a pipeline and then connected with the oil return pipe, and the working oil port 2 of the oil pressure main control valve 13 is connected with the second overflow valve 15 through a pipeline and then connected with the oil return pipe. The rocker drive unit 2 is provided with a rocker main control valve 21 and a rocker cylinder 22, and the rocker main control valve 21 adopts a proportional directional valve, the oil inlet and oil return port of the rocker main control valve 21 are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a differential pressure reducing valve 23 is provided on the pipeline connected to the oil inlet of the rocker main control valve 21, and the two working oil ports of the rocker main control valve 21 are connected to the positive and negative chambers of the rocker cylinder 22 one by one through the first oil circuit and the second oil circuit, and a first balancing valve 24 and a second balancing valve 25 are correspondingly provided on the first oil circuit and the second oil circuit. The latch driving unit 3 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 31 and a swing-back latch oil cylinder 32, wherein the swing-back latch control valve 31 is a three-position four-way electromagnetic reversing valve, and the oil inlet and oil return port of the swing-back latch control valve 31 are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a first speed regulating valve 33 is provided on the pipeline connected to the oil inlet of the swing-back latch control valve 31, and the two working oil ports of the swing-back latch control valve 31 are connected to the positive and negative chambers of the swing-back latch oil cylinder 32 through the third oil circuit and the fourth oil circuit in a one-to-one correspondence, and a third balance valve 33 is correspondingly provided on the third oil circuit and the fourth oil circuit. Valve 34 and the fourth balance valve 35; the swing-open latch circuit is provided with a swing-open latch main control valve 36 and a swing-open latch cylinder 37, and the swing-open latch main control valve 36 adopts a three-position four-way electromagnetic reversing valve, the oil inlet and oil return port of the swing-open latch main control valve 36 are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a second speed regulating valve 38 is arranged on the pipeline connected to the oil inlet of the swing-open latch main control valve 36, the two working oil ports of the swing-open latch main control valve 36 are connected one-to-one with the positive and negative chambers of the swing-open latch cylinder 37 through the fifth oil circuit and the sixth oil circuit, and a fifth balance valve 39 and a sixth balance valve 310 are correspondingly arranged on the fifth oil circuit and the sixth oil circuit.

[0022] The above arrangement constitutes a rocket launch platform rocker arm hydraulic system which has the advantages of simple structure, convenient control, good safety, high reliability and strong practicality. In actual application, the rocker arm is hinged on the launch tower through a rotating shaft, and the two ends of the rocker arm cylinder 22 are correspondingly hinged on the launch tower and the rocker arm, so that the rocker arm can be driven to rotate by the extension and retraction action of the rocker arm cylinder 22, wherein the rotation action of the rocker arm toward the rocket is swinging back, and the rotation action of the rocker arm away from the rocket is swinging away, and the piston rods of the swing-back latch cylinder 32 and the swing-away latch cylinder 37 are correspondingly connected to the swing-back latch and the swing-away latch, so that the swing-back latch and the swing-away latch can be correspondingly driven to move by the extension and retraction action of the swing-back latch cylinder 32 and the swing-away latch cylinder 37, so that the swing-back latch and the swing-away latch can be inserted into the corresponding lock hole or pulled out from the corresponding lock hole, wherein the swing-back latch is used to insert into the corresponding lock hole after the rocker arm is swung back into place, so that the rocker arm can maintain a stable state at this position, and the swing-away latch is used to insert into the corresponding lock hole after the rocker arm is swung into place, so that the rocker arm can maintain a stable state at this position.The present invention sets an oil pressure main control circuit composed of a variable pump 12, an oil pressure main control valve 13, a first relief valve 14, a second relief valve 15 and related pipelines in the oil pumping unit 1. On the one hand, the variable pump 12 adjusts the output flow according to the proportional signal, thereby realizing stepless regulation of the oil flow and improving control accuracy and convenience. On the other hand, the oil pressure main control valve 13 is connected to the relief valves of different pressures, thereby realizing precise control of the oil pressure and also improving control accuracy and convenience. The specific process of oil pressure control is to use the oil pressure main control valve 13 to connect the first relief valve 14 set to a high pressure, and the oil pressure of the main oil pipe will be released only when it is higher than the set pressure of the first relief valve 14, thereby ensuring the swing The rod driving unit 2 needs high-pressure oil, and the oil pressure main control valve 13 is used to connect the second relief valve 15 set to a low pressure. As long as the oil pressure in the main oil pipe is higher than the set pressure of the second relief valve 15, the pressure will be released, thereby ensuring the demand of the latch driving unit 3 for low-pressure oil; by setting the swing rod driving unit 2 with a swing rod main control valve 21 and a differential pressure reducing valve 23, and making the swing rod main control valve 21 adopt a proportional directional valve, the oil circuit connection and oil flow direction can be conveniently and quickly controlled, thereby controlling the extension and retraction action of the swing rod cylinder 22, and the oil flow rate can be proportionally adjusted to enable the swing rod cylinder 22 to continuously change speed. By setting the first balance valve 24 and the second balance valve 25, the swing rod cylinder 22 can be effectively prevented from moving improperly due to load changes. The invention relates to a novel structure for the hydraulic cylinder 32, which is convenient for controlling the hydraulic cylinder 32 and the hydraulic cylinder 33. The hydraulic cylinder 32 has the advantages of high stability, high stability, and can play an overflow protection role when the oil circuit pressure is too large, thereby improving stability and safety; by setting the swing-back latch circuit and the swing-open latch circuit in the latch driving unit 3, the convenience of controlling the swing-back latch and the swing-open latch is improved; by setting the swing-back latch control valve 31 in the swing-back latch circuit, the on-off of the oil circuit and the flow direction of the oil can be conveniently and quickly controlled, thereby controlling the extension and retraction action of the swing-back latch cylinder 32; by setting the first speed regulating valve 33 to adjust the oil flow rate, accurate control of the movement speed of the piston rod of the swing-back latch cylinder 32 is achieved; by setting the third balancing valve 34 and the fourth balancing valve 35, the stability of the movement of the piston rod of the swing-back latch cylinder 32 is guaranteed, and the swing-back latch cylinder 32 has The invention can reliably maintain the piston rod in a stopped state, and ensure the stability and reliability of the swing arm in the swing back to the original state. By setting the swing latch main control valve 36 in the swing latch circuit, the oil circuit opening and closing and the oil flow direction can be conveniently and quickly controlled, thereby controlling the extension and retraction of the swing latch cylinder 37. By setting the second speed regulating valve 38 to adjust the oil flow, the precise control of the movement speed of the piston rod of the swing latch cylinder 37 is achieved. By setting the fifth balancing valve 39 and the sixth balancing valve 310, the stability of the movement of the piston rod of the swing latch cylinder 37 is guaranteed, and the swing latch cylinder 37 has the reliable ability to maintain the piston rod in a stopped state, thereby ensuring the stability and reliability of the swing arm in the swing into position state.It should be noted that the launch tower, rocker arm, swing-back latch and swing-open latch are all components of the rocket launch platform, and their structures, principles and connection methods with the hydraulic system are well known to those skilled in the art and will not be elaborated here.

[0023] As an optimization scheme, this specific embodiment also provides the oil pumping unit 1 with an oil pressure backup control circuit consisting of a metering pump 16, an oil pressure backup control valve 17, a third overflow valve 18, a fourth overflow valve 19 and related pipelines. Combined with the oil pressure main control circuit, an oil source redundant control structure is formed, which improves the reliability and safety of the oil pumping unit 1 and the entire system. The specific setting method of the oil pressure backup control circuit is: the input port of the metering pump 16 is connected to the oil tank 11, the output port of the metering pump 16 is connected to the main oil delivery pipe through the auxiliary oil delivery pipe, and the oil pressure backup control valve 17 adopts a three-position four-way electromagnetic reversing valve, wherein the oil inlet and the oil return port of the oil pressure backup control valve 17 are respectively connected to the auxiliary oil delivery pipe and the oil return pipe through pipelines, the working oil port 1 of the oil pressure backup control valve 17 is connected to the return oil pipe after being connected to the third overflow valve 18 through a pipeline, and the working oil port 2 of the oil pressure backup control valve 17 is connected to the return oil pipe after being connected to the fourth overflow valve 19 through a pipeline. With this arrangement, when a fault occurs in the main oil pressure control circuit, the system can operate normally by activating the oil pressure backup control circuit. Specifically, the metering pump 16 is started, and the third relief valve 18 set to high pressure is connected by the oil pressure backup control valve 17. The oil pressure in the auxiliary oil pipe and the main oil pipe will be relieved only when it is higher than the set pressure of the third relief valve 18, thereby ensuring the demand of the rocker drive unit 2 for high-pressure oil. The fourth relief valve 19 set to low pressure is connected by the oil pressure backup control valve 17. The oil pressure in the auxiliary oil pipe and the main oil pipe will be relieved only when it is higher than the set pressure of the fourth relief valve 19, thereby ensuring the demand of the latch drive unit 3 for low-pressure oil. In order to enhance the safety and reliability of the oil pumping unit 1 and the entire hydraulic system, the present specific embodiment further provides the oil pumping unit 1 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 respectively connected to the main oil delivery 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 to the auxiliary oil delivery pipe and the oil return pipe through pipelines. When the oil pressure main control circuit is working and the oil pressure of the main oil delivery pipe exceeds the set pressure of the first safety valve 110, the first safety valve 110 will automatically open to release the pressure, and when the oil pressure of the auxiliary oil delivery pipe exceeds the set pressure of the second safety valve 111 when the oil pressure backup control circuit is working and the oil pressure of the auxiliary oil delivery pipe exceeds the set pressure of the second safety valve 111, the second safety valve 111 will automatically open to release the pressure, which can effectively prevent accidents caused by excessive oil pressure and improve safety and reliability.

[0024] In practical application, the present invention sequentially arranges the first check valve 112, the first filter 113 and the second check valve 114 on the main oil delivery pipe, and connects the third check valve 115 in parallel to the first filter 113, wherein the connection points of the oil pressure main control valve 13 and the first safety valve 110 with the main oil delivery pipe are located between the first filter 113 and the second check valve 114. This arrangement can prevent the oil in the main oil delivery pipe from flowing back by using the first check valve 112 and the second check valve 114, thereby ensuring the safety of the system, and uses the first filter 113 to filter out impurities in the oil, thereby ensuring the cleanliness of the oil and the stability of the system, and when the first filter 113 is blocked, the oil can flow through the bypass third check valve 115. Similarly, the present invention sequentially arranges the fourth check valve 116, the second filter 117 and the fifth check valve 118 on the auxiliary oil delivery pipe, and connects the sixth check valve 119 to the second filter 117 in parallel, wherein the connection points of the oil pressure backup control valve 17 and the second safety valve 111 with the auxiliary oil delivery pipe are located between the second filter 117 and the fifth check valve 118. This arrangement can prevent the oil in the auxiliary oil delivery pipe from flowing back by using the fourth check valve 116 and the fifth check valve 118, and also ensures the safety of the system, and also ensures the cleanliness of the oil and the stability of the system by using the second filter 117 to filter out the impurities in the oil, and also ensures the cleanliness of the oil and the stability of the system, and when the second filter 117 is blocked, the oil can flow through the bypassed sixth check valve 119. In order to facilitate the measurement of the oil pressure of the main oil delivery pipe, the present invention arranges the seventh pressure sensor 120 on the main oil delivery pipe, wherein the second check valve 114 is located between the seventh pressure sensor 120 and the first filter 113. To ensure that the oil pressure main control circuit and the oil pressure backup control circuit operate independently, the present invention sets the connection point between the auxiliary oil delivery pipe and the main oil delivery pipe at a position between the seventh pressure sensor 120 and the second one-way valve 114 .

[0025] As an optimization scheme, this specific implementation method adds a rocker arm backup control valve 26 to the rocker arm drive unit 2, and makes the rocker arm backup control valve 26 adopt a three-position four-way electromagnetic reversing valve and is provided with a reversing in place monitoring sensor to control the oil circuit on-off and the oil flow direction, wherein the oil inlet and oil return port of the rocker arm backup control valve 26 are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a third speed regulating valve 27 is provided on the pipeline connected to the oil inlet of the rocker arm backup control valve 26, 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 a solenoid valve 29, and the two working oil ports of the rocker arm backup control valve 26 are connected one-to-one with the first oil circuit and the second oil circuit through the seventh oil circuit and the eighth oil circuit, and a seventh balancing valve 210 and an eighth balancing valve 211 are provided on the seventh oil circuit and the eighth oil circuit respectively. This structure forms a rocker redundant control structure by setting up a rocker backup control circuit consisting of a rocker backup control valve 26, a third speed regulating valve 27, a fourth speed regulating valve 28, a solenoid valve 29, a seventh balancing valve 210, an eighth balancing valve 211 and related pipelines, combined with a rocker main control circuit consisting of a rocker main control valve 21, a differential pressure reducing valve 23, a first balancing valve 24, a second balancing valve 25 and related pipelines. When the rocker main control circuit fails, the rocker backup control circuit can be activated to enable the system to operate normally, thereby improving the reliability and safety of the rocker drive unit 2 and the entire system. At the same time, the present invention sets the third speed regulating valve 27 and the fourth speed regulating valve 28 in parallel, and makes the fourth speed regulating valve 28 connected in series with the solenoid valve 29, which is conducive to the different speed regulation of the oil by the third speed regulating valve 27 and the fourth speed regulating valve 28, and controls the on-off of the oil circuit of the fourth speed regulating valve 28 by the solenoid valve 29, so as to realize the rapid switching of the two speeds of the swing rod oil cylinder 22, and improve the control convenience. When the solenoid valve 29 is powered on, the piston rod of the swing rod oil cylinder 22 moves quickly, and when the solenoid valve 29 is powered off and disconnected, the piston rod of the swing rod oil cylinder 22 moves slowly. Similar to the first balancing valve 24 and the second balancing valve 25, by setting the seventh balancing valve 210 and the eighth balancing valve 211, the swing rod oil cylinder 22 can be effectively prevented from unstable movement due to load changes, and can play an overflow protection role when the oil circuit pressure is too large, thereby improving stability and safety.In practical applications, in order to facilitate the measurement of the pressures in the positive and negative chambers of the rocker arm cylinder 22, the present invention correspondingly sets a first pressure sensor 212 and a second pressure sensor 213 on the first oil circuit and the second oil circuit; in order to accurately determine whether the rocker arm action (swinging open and swinging back) is in place, the present invention sets a first extended position travel switch 214 and a first received position travel switch 215 on one side of the rocker arm cylinder 22. When the first extended position travel switch 214 triggers a signal, it indicates that the piston rod of the rocker arm cylinder 22 has been extended to the position, and correspondingly, it indicates that the rocker arm has been swung back to the position. At this time, the rocker arm can maintain the stability of the swung back state by inserting the swing back pin into the corresponding lock hole. When the first received position travel switch 215 triggers a signal, it indicates that the piston rod of the rocker arm cylinder 22 has been retracted to the position, and correspondingly, it indicates that the rocker arm has been swung open to the position. At this time, the swing open pin can be inserted into the corresponding lock hole to keep the stability of the swung open state. In order to filter out the impurities in the return oil and ensure the cleanliness of the oil in the oil tank 11, the present invention provides an oil filter 121 on the return oil pipe and a flow meter 122 on the return oil pipe to monitor the return oil flow rate.

[0026] As an optimization solution, this specific implementation method adds a swing latch spare control valve 311 to the swing latch circuit, and the swing latch spare control valve 311 adopts a three-position four-way electromagnetic reversing valve to control the oil circuit and the oil flow direction, wherein the oil inlet and oil return port of the swing latch spare control valve 311 are respectively connected to the main oil supply pipe and the oil return pipe through pipelines, and a fifth speed regulating valve 312 is provided on the pipeline connected to the oil inlet of the swing latch spare control valve 311, and the two working oil ports of the swing latch spare control valve 311 are connected to the fifth oil circuit and the sixth oil circuit through the ninth oil circuit and the tenth oil circuit in a one-to-one correspondence, and a ninth balance valve 313 and a tenth balance valve 314 are correspondingly provided on the ninth oil circuit and the tenth oil circuit. This structure forms a swing latch redundant control structure by setting a swing latch standby control circuit composed of a swing latch standby control valve 311, a fifth speed regulating valve 312, a ninth balance valve 313, a tenth balance valve 314 and related pipelines, and combining a swing latch main control circuit composed of a swing latch main control valve 36, a swing latch main control valve 36, a fifth balance valve 39, a sixth balance valve 310 and related pipelines. When the swing latch main control circuit fails, the swing latch standby control circuit can be activated to enable the system to operate normally, thereby improving the reliability and safety of the latch drive unit 3 and the entire system. At the same time, the present invention adjusts the oil flow by setting the fifth speed regulating valve 312, thereby achieving precise control of the movement speed of the piston rod of the swing latch oil cylinder 37. Similar to the fifth balancing valve 39 and the sixth balancing valve 310, by setting the ninth balancing valve 313 and the tenth balancing valve 314, the smoothness of the movement of the piston rod of the swing-open latch oil cylinder 37 is ensured, and the swing-open latch oil cylinder 37 has the reliable ability to keep the piston rod in a stopped state, ensuring the stability of the swing rod in the swing-open position state. In order to improve the control convenience and enhance the safety and reliability, the present specific embodiment also sets the first on-off valve 315 and the second on-off valve 316, both of which are two-position three-way electromagnetic reversing valves, in the swing-open latch circuit, wherein the first on-off valve 315 is set on the pipeline connected to the oil inlet of the swing-open latch main control valve 36, and the second on-off valve 316 is set on the pipeline connected to the oil inlet of the swing-open latch standby control valve 311. This setting controls the on-off of the corresponding oil circuit through the first on-off valve 315 and the second on-off valve 316, thereby improving the fault isolation capability. 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 latch 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 on the pipeline connected to the oil inlet of the swing-open latch main control valve 36, and the oil return port of the first on-off valve 315 is connected in parallel to the pipeline connected to the oil return port of the swing-open latch 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 latch standby 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 on the pipeline connected to the oil inlet of the swing-open latch standby control valve 311, and the oil return port of the second on-off valve 316 is connected in parallel to the pipeline connected to the oil return port of the swing-open latch standby control valve 311.

[0027] In practical applications, in order to facilitate the measurement of the pressures in the positive and negative chambers of the swing return latch cylinder 32, the present invention correspondingly arranges a third pressure sensor 317 and a fourth pressure sensor 318 on the third oil circuit and the fourth oil circuit; in order to accurately determine whether the extension and retraction action of the swing return latch cylinder 32 is in place, the present invention arranges a second extension-to-position travel switch 319 and a second retraction-to-position travel switch 320 on one side of the swing return latch cylinder 32. When the second extension-to-position travel switch 319 triggers a signal, it indicates that the piston rod of the swing return latch cylinder 32 has been extended to the position, and correspondingly, it indicates that the swing return latch has been inserted into the corresponding lock hole. When the second retraction-to-position travel switch 320 triggers a signal, it indicates that the piston rod of the swing return latch cylinder 32 has been retracted to the position, and correspondingly, it indicates that the swing return latch has been pulled out from the corresponding lock hole. Similarly, in order to facilitate the measurement of the pressure in the positive and negative chambers of the swing latch cylinder 37, the present invention correspondingly arranges a fifth pressure sensor 321 and a sixth pressure sensor 322 on the fifth oil circuit and the sixth oil circuit; in order to accurately determine whether the extension and retraction action of the swing latch cylinder 37 is in place, the present invention arranges a third extension-to-position travel switch 323 and a third retraction-to-position travel switch 324 on one side of the swing latch cylinder 37. When the third extension-to-position travel switch 323 triggers a signal, it indicates that the piston rod of the swing latch cylinder 37 has been extended to the position, and correspondingly, it indicates that the swing latch has been inserted into the corresponding lock hole. When the third retraction-to-position travel switch 324 triggers a signal, it indicates that the piston rod of the swing latch cylinder 37 has been retracted to the position, and correspondingly, it indicates that the swing latch has been inserted into the corresponding lock hole. In order to prevent oil from spilling and improve safety and reliability, the present invention further provides the latch drive unit 3 with a seventh one-way valve 325, an eighth one-way valve 326 and a ninth one-way valve 327, wherein the seventh one-way valve 325 is provided on a pipeline connected to the oil return port of the swing-back latch control valve 31, the eighth one-way valve 326 is provided on a pipeline connected to the oil return port of the swing-open latch main control valve 36, and the ninth one-way valve 327 is provided on a pipeline connected to the oil return port of the swing-open latch standby control valve 311. In order to ensure the cleanliness of the oil entering the latch drive unit 3, the present invention further provides a third filter 328 on the pipeline connected to the oil inlet of the swing-back latch control valve 31, the swing-open latch main control valve 36 and the swing-open latch standby control valve 311, so as to filter out foreign matter in the oil.

[0028] Practical application shows that the rocket launch platform rocker hydraulic system provided by the present invention can produce the following beneficial effects: a) by designing a redundant oil source control circuit and using high and low pressure relief valves to control the output oil pressure, the requirements of high pressure drive of the rocker and low pressure drive of the latch are met at the same time, thereby improving the reliability and safety of the power source of the hydraulic system; b) by making the main control circuit of the rocker adopt a proportional directional valve and a differential pressure reducing valve, the continuous adjustment of the extension and retraction action and movement speed of the piston rod of the rocker cylinder is realized, and by setting a two-way balancing valve in the positive and negative chambers of the rocker cylinder, the influence of load changes on the extension and retraction speed of the rocker cylinder is reduced; c) by setting a speed regulating valve and a solenoid valve in the rocker standby control circuit, the two-speed adjustment and conversion function of the extension and retraction speed of the rocker cylinder is realized, and by setting a reversing in place monitoring sensor in the rocker standby control valve, the monitoring of the valve core position is realized, and the reliable operation of the rocker standby control circuit can be ensured; d) by setting the swing return latch circuit The speed regulating valve at the oil inlet end realizes the control of the extension and retraction speed of the swing return latch cylinder. By setting the two-way balancing valve of the positive and negative chambers of the swing return latch cylinder, the stability of the extension and retraction action of the swing return latch cylinder is guaranteed, and the swing return latch cylinder has a reliable ability to maintain a stopped state. Accordingly, the swing return latch is inserted into the corresponding key hole to ensure the stability and reliability of the swing arm in the swing back state; e) By setting a redundant structure composed of a swing open latch main control circuit and a swing open latch backup control circuit, the stability and reliability of the swing open latch circuit are improved. By setting the speed regulating valve at the oil inlet end of the swing open latch circuit, the extension and retraction speed of the swing open latch cylinder is controlled. By setting the two-way balancing valve of the positive and negative chambers of the swing open latch cylinder, the stability of the extension and retraction action of the swing open latch cylinder is guaranteed, and the swing open latch cylinder has a reliable ability to maintain a stopped state. Accordingly, the swing open latch is inserted into the corresponding key hole to ensure the stability and reliability of the swing arm in the swing open state.

[0029] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A rocket launch platform rocker arm hydraulic system, comprising an oil pumping unit (1), a rocker arm driving unit (2) and a latch driving unit (3), characterized in that: The oil pumping unit (1) comprises an oil tank (11), a variable pump (12) and an oil pressure main control valve (13); the oil tank (11) is connected to an oil return pipe; the input port of the variable pump (12) is connected to the oil tank (11); the output port of the variable pump (12) is connected to a main oil delivery pipe; the oil pressure main control valve (13) is a three-position four-way electromagnetic reversing valve; the oil inlet and the oil return port of the oil pressure main control valve (13) are respectively connected to the main oil delivery pipe and the oil return pipe via pipelines; the working oil port 1 of the oil pressure main control valve (13) is connected to a first relief valve (14) via a pipeline and then connected to the oil return pipe; the working oil port 2 of the oil pressure main control valve (13) is connected to a second relief valve (15) via a pipeline. The swing arm drive unit (2) comprises a swing arm main control valve (21) and a swing arm oil cylinder (22). The swing arm main control valve (21) is a proportional directional valve. The oil inlet and oil return port of the swing arm main control valve (21) are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A differential pressure reducing valve (23) is provided on the pipeline connected to the oil inlet of the swing arm main control valve (21). The two working oil ports of the swing arm main control valve (21) are connected to the positive and negative chambers of the swing arm oil cylinder (22) through the first oil circuit and the second oil circuit in a one-to-one correspondence. The first oil circuit and the second oil circuit are correspondingly provided with a first balancing valve (24) and a second balancing valve (25). The latch drive unit (3) comprises The swing-back latch circuit and the swing-open latch circuit are provided, wherein the swing-back latch circuit comprises 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 oil return port of the swing-back latch control valve (31) are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A first speed regulating valve (33) is provided on the pipeline connected to the oil inlet of the swing-back latch control valve (31). Two working oil ports of the swing-back latch control valve (31) are connected to the positive and negative chambers of the swing-back latch oil cylinder (32) through a third oil circuit and a fourth oil circuit in a one-to-one correspondence. A third balancing valve (34) and a fourth balancing valve (35) are provided on the third oil circuit and the fourth oil circuit in a corresponding manner. The swing latch circuit includes a swing latch main control valve (36) and a swing latch oil cylinder (37). The swing latch main control valve (36) is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return port of the swing latch main control valve (36) are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A second speed regulating valve (38) is provided on the pipeline connected to the oil inlet of the swing latch main control valve (36). The two working oil ports of the swing latch main control valve (36) are connected to the positive and negative chambers of the swing latch oil cylinder (37) through the fifth oil circuit and the sixth oil circuit. A fifth balancing valve (39) and a sixth balancing valve (310) are correspondingly provided on the fifth oil circuit and the sixth oil circuit.

2. A rocket launch platform rocker arm hydraulic system according to claim 1, characterized in that: The oil pumping unit (1) further comprises a metering pump (16) and an oil pressure standby control valve (17); the input port of the metering pump (16) is connected to the oil tank (11); the output port of the metering pump (16) is connected to the main oil supply pipe via an auxiliary oil supply pipe; the oil pressure standby control valve (17) is a three-position four-way electromagnetic reversing valve; the oil inlet and oil return port of the oil pressure standby control valve (17) are respectively connected to the auxiliary oil supply pipe and the oil return pipe via pipelines; the working oil port 1 of the oil pressure standby control valve (17) is connected to the third overflow valve (18) via a pipeline and then to the oil return pipe; the working oil port 2 of the oil pressure standby control valve (17) is connected to the fourth overflow valve (19) via a pipeline and then to the oil return pipe.

3. A rocket launch platform rocker arm hydraulic system according to claim 2, characterized in that: The swing arm drive unit (2) also includes a swing arm standby control valve (26), which is a three-position four-way electromagnetic reversing valve and is provided with a reversing position monitoring sensor. The oil inlet and oil return port of the swing arm standby control valve (26) are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A third speed regulating valve (27) is provided on the pipeline connected to the oil inlet of the swing arm standby control 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 a solenoid valve (29). The two working oil ports of the swing arm standby control valve (26) are connected to the first oil circuit and the second oil circuit in a one-to-one correspondence through a seventh oil circuit and an eighth oil circuit. A seventh balancing valve (210) and an eighth balancing valve (211) are provided on the seventh oil circuit and the eighth oil circuit respectively.

4. A rocket launch platform rocker arm hydraulic system according to claim 3, characterized in that: The swing latch circuit also includes a swing latch standby control valve (311), which is a three-position four-way electromagnetic reversing valve. The oil inlet and oil return port of the swing latch standby control valve (311) are respectively connected to the main oil supply pipe and the oil return pipe through pipelines. A fifth speed regulating valve (312) is provided on the pipeline connected to the oil inlet of the swing latch standby control valve (311). The two working oil ports of the swing latch standby control valve (311) are connected to the fifth oil circuit and the sixth oil circuit through the ninth oil circuit and the tenth oil circuit in a one-to-one correspondence. The ninth oil circuit and the tenth oil circuit are correspondingly provided with a ninth balancing valve (313) and a tenth balancing valve (314).

5. A rocket launch platform rocker arm hydraulic system according to claim 4, characterized in that: The swing latch circuit also includes 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 a pipeline connected to the oil inlet of the swing latch main control valve (36), and the second on-off valve (316) is arranged on a pipeline connected to the oil inlet of the swing latch standby control valve (311).

6. A rocket launch platform rocker arm hydraulic system according to claim 5, characterized in that: The oil 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 to the main oil delivery pipe and the oil return pipe via pipelines, and the oil inlet and the oil outlet of the second safety valve (111) are respectively connected to the auxiliary oil delivery pipe and the oil return pipe via pipelines.

7. A rocket launch platform rocker arm hydraulic system according to claim 6, characterized in that: The main oil delivery pipe is provided with a first check valve (112), a first filter (113) and a second check valve (114) in sequence, the first filter (113) is connected in parallel with a third check valve (115), the auxiliary oil delivery pipe is provided with a fourth check valve (116), a second filter (117) and a fifth check valve (118) in sequence, 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 delivery pipe are both 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 delivery pipe are both located between the second filter (117) and the fifth check valve (118).

8. The rocket launch platform rocker arm hydraulic system according to claim 6, characterized in that: A first pressure sensor (212) and a second pressure sensor (213) are provided on the first oil circuit and the second oil circuit respectively, and a first extended position travel switch (214) and a first received position travel switch (215) are provided on one side of the swing arm oil cylinder (22).

9. A rocket launch platform rocker arm hydraulic system according to claim 6, characterized in that: The third oil circuit and the fourth oil circuit are provided with a third pressure sensor (317) and a fourth pressure sensor (318) respectively, and one side of the swing-back latch oil cylinder (32) is provided with a second extended position travel switch (319) and a second received position travel switch (320); the fifth oil circuit and the sixth oil circuit are provided with a fifth pressure sensor (321) and a sixth pressure sensor (322) respectively, and one side of the swing-out latch oil cylinder (37) is provided with a third extended position travel switch (323) and a third received position travel switch (324).

10. A rocket launch platform rocker arm hydraulic system according to claim 6, characterized in that: The main oil delivery pipe is provided with a seventh pressure sensor (120), the second one-way valve (114) is located between the seventh pressure sensor (120) and the first filter (113), the connection point between the auxiliary oil delivery pipe and the main oil delivery pipe is located between the seventh pressure sensor (120) and the second one-way valve (114), the oil return pipe is provided with an oil filter (121) and a flow meter (122), the latch drive unit (3) further comprises a seventh one-way valve (325), an eighth one-way valve (326) and a ninth one-way valve (327), the seventh one-way valve (325) is arranged on a pipeline connected to the oil return port of the swing latch control valve (31), the eighth one-way valve (326) is arranged on a pipeline connected to the oil return port of the swing latch main control valve (36), and the ninth one-way valve (327) is arranged on a pipeline connected to the oil return port of the swing latch standby control valve (311).

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