Ejection actuating device

Abstract

The utility model relates to the technical field of hydraulic ejection actuation, in particular to an ejection actuation device which comprises an oil tank, a first electromagnetic reversing valve, a first electro-hydraulic reversing valve, two ejection actuation cylinders, a second electro-hydraulic reversing valve, a second electromagnetic reversing valve, a hook opening actuator, a controller, an acquisition module and a driving source. According to the device, the energy accumulator is used for driving the unhooking actuator to unhook, first unhooking and second ejection are achieved, whether the unhooking actuator unhooks or not and whether the ejection actuator ejects or not are collected through the collection module to determine the ejection state, then the ejection mode is switched in real time according to the ejection state, the ejection process is coherent, and the ejection time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic ejection actuation, and particularly relates to an ejection actuation device. Background Art

[0002] Currently, ejection devices are mainly divided into ejection by ejection cartridges, ejection by high-pressure gas cylinders, and gas-liquid hybrid ejection. Although the ejection cartridge ejection method has a light device weight, the combustion of the ejection cartridge will produce residues, which may cause pipeline blockage and affect the smooth progress of ejection. Therefore, the actuator cylinder and pipeline in the device need to be cleaned every two ejections, resulting in a huge amount of logistics work and the generation of pollutants. In the high-pressure gas cylinder ejection method, the air pressure in the gas cylinder changes with temperature, and the ejection effect is uncertain.

[0003] The theoretical model of gas-liquid hybrid ejection in the prior art is being gradually improved, but the existing solutions mainly have the following problems: large space occupation: due to the need to provide sufficient ejection speed for the load, the ejection device has a long stroke, thus occupying a large amount of space and having a low space utilization rate; unable to adjust the load attitude: the current single ejection device can only eject the load in a fixed attitude and cannot adapt to more ejection working conditions. Moreover, in the form of combining single ejection with a pylon, the mechanism wear will increase when the load is eccentrically mounted; unable to switch modes in real time according to the ejection state: the existing solutions for switching ejection modes are all open-loop controls, resulting in an extended ejection time; the hook-opening process before ejection is not considered.

[0004] Therefore, it is necessary to provide an ejection actuation device to solve the above problems. Summary of the Invention

[0005] The present invention provides an ejection actuation device to solve the problems that the existing solutions for switching ejection modes are all open-loop controls, resulting in an extended ejection time, and the hook-opening process before ejection is not considered, that is, unable to switch modes in real time according to the ejection state.

[0006] An ejection actuation device of the present invention adopts the following technical solutions, including: an oil tank, a first electromagnetic directional valve, a first electro-hydraulic directional valve, two ejection actuator cylinders, a second electro-hydraulic directional valve, a second electromagnetic directional valve, a hook-opening actuator, a controller, a collection module, and a drive source;

[0007] An accumulator is connected to the oil tank, and a first electromagnetic directional valve is arranged on the pipeline between the accumulator and the oil tank;

[0008] The inlet of the first electro-hydraulic directional valve is connected between the outlet of the first electromagnetic directional valve and the accumulator, and the outlet of the first electro-hydraulic directional valve is respectively communicated with the rodless cavity of the hook-opening actuator, the rodless cavity and the rodless cavity of the two ejection actuator cylinders; wherein, the second electro-hydraulic directional valve is arranged on the pipeline between the rodless cavities of the two ejection actuator cylinders and the outlet of the first electro-hydraulic directional valve;

[0009] One end of the second electromagnetic reversing valve communicates with the fuel tank, and the other end of the second electromagnetic reversing valve is respectively communicated with the rod chambers and the rodless chambers of the two ejection actuators through pipelines;

[0010] The drive source is used to drive the hydraulic oil in the fuel tank to supply oil to the accumulator, the rod chamber of the ejection actuator or the rodless chamber of the ejection actuator;

[0011] The controller is used to control the second electro-hydraulic reversing valve to make the accumulator communicate with the rodless chambers of the two ejection actuators through the second electro-hydraulic reversing valve when the hook opener is collected by the acquisition module; and is used to control the second electro-hydraulic reversing valve to make the rodless chambers of the two ejection actuators communicate with the fuel tank when the load on the ejection actuator is ejected as collected by the acquisition module.

[0012] Preferably, variable throttle valves are arranged at the inlets of the rod chambers and the rodless chambers of the two ejection actuators, and the variable throttle valves are used to adjust the flow rate of the hydraulic oil entering the rod chambers and the rodless chambers of the ejection actuators.

[0013] Preferably, the second electromagnetic reversing valve is a three-position four-way valve. Both outlets of the second electromagnetic reversing valve communicate with the fuel tank. One inlet of the second electromagnetic reversing valve is respectively communicated with the rod chambers of the two ejection actuators, and the pressure relief ports of the second electromagnetic reversing valve are respectively communicated with the rodless chambers of the two ejection actuators.

[0014] Preferably, an overflow valve is arranged on the pipeline connecting one of the outlets of the second electromagnetic reversing valve and the fuel tank. When the drive source supplies oil to the accumulator and the accumulator reaches the set pressure, the overflow valve is controlled to open to prevent the pressure in the system from being too high.

[0015] Preferably, the second electro-hydraulic reversing valve is a three-position three-way valve. The inlet of the second electro-hydraulic reversing valve is connected to the pipeline between the hook opener and the rod chamber of the ejection actuator. The inlet of the second electro-hydraulic reversing valve is respectively communicated with the rodless chambers of the two ejection actuators, and the pressure relief port of the second electro-hydraulic reversing valve communicates with the fuel tank.

[0016] Preferably, the first electromagnetic reversing valve is a three-position three-way valve. Both the inlet and the pressure relief port of the first electromagnetic reversing valve communicate with the fuel tank, and the outlet of the first electromagnetic reversing valve communicates with the accumulator.

[0017] Preferably, the drive source includes: a motor and a hydraulic pump. The motor is used to drive the hydraulic pump to work, and the hydraulic pump is arranged on the oil inlet pipeline connecting the inlet of the first electromagnetic reversing valve and the fuel tank, and the oil inlet pipeline communicates with one of the outlets of the second electromagnetic reversing valve.

[0018] Preferably, the acquisition module includes a catapult actuator sensor and a hook release actuator sensor. Both the catapult actuator sensor and the hook release actuator sensor are electrically connected to the controller. The hook release actuator sensor is used to detect whether the hook release actuator releases the hook, and the catapult actuator sensor is used to detect whether the load on the catapult actuator is catapulted. Both the hook release actuator sensor and the catapult actuator sensor send the detected information to the controller.

[0019] Preferably, the catapult actuator is of a double-body multi-stage form.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. By using an accumulator to drive the hook release actuator to release the hook, the hook is released first and then the catapulting is performed. The acquisition module acquires whether the hook release actuator releases the hook and whether the catapult actuator catapults to determine the catapult state. Then, according to the catapult state, the catapult mode is switched in real time, making the catapult process coherent and shortening the catapult time.

[0022] 2. The catapult actuator of the present utility model is of a double-body multi-stage form. The double-body multi-stage actuator can shorten the longitudinal space occupied by the device under the condition of unchanged catapult stroke, that is, when the double-body multi-stage catapult actuator meets the catapult stroke, the longitudinal length is shorter when retracted, and the occupied space is smaller. The double-body multi-stage catapult actuator can also adjust the attitude during the catapult of the load by adjusting the different extension amounts of the two catapult actuators, that is, by controlling the opening degrees of the throttle valves of the two catapult actuators to adjust the oil flow rate entering the catapult actuator.

[0023] 3. After the catapulting is completed, the catapult actuator device is controlled to enter the fast recovery mode, that is, the second electro-hydraulic directional valve is in the right position, that is, the A port of the second electro-hydraulic directional valve is connected to the T port. At this time, the rodless cavity of the catapult actuator is connected to the fuel tank. Since the pressure in the fuel tank is much lower than the pressure in the accumulator, that is, the pressure in the rodless cavity of the catapult actuator is much lower than the pressure in the rod chamber of the catapult actuator, under the action of the pressure difference, the oil in the accumulator flows into the rod chamber of the catapult actuator, and the oil in the rodless cavity of the catapult actuator flows back to the fuel tank, completing the fast retraction action and shortening the total time used in the catapult process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a structural schematic diagram of a catapult actuator device of the present invention;

[0026] Figure 2 Schematic diagram of the oil flow direction of a catapult actuating device of the present invention in the slow lowering mode;

[0027] Figure 3 Schematic diagram of the oil flow direction of a catapult actuating device of the present invention in the slow retraction mode;

[0028] Figure 4 Schematic diagram of the oil flow direction of a catapult actuating device of the present invention in the energy storage mode;

[0029] Figure 5 Schematic diagram of the oil flow direction of a catapult actuating device of the present invention in the catapult mode;

[0030] Figure 6 Schematic diagram of the oil flow direction of a catapult actuating device of the present invention in the fast retraction mode.

[0031] In the figure: 1, hydraulic pump; 2, motor; 3, accumulator; 4, overflow valve; 5, first electromagnetic directional valve; 6, first electro-hydraulic directional valve; 7, second electro-hydraulic directional valve; 8, second electromagnetic directional valve; 9, hook opening actuator; 10, hook opening actuator sensor; 11, catapult actuator cylinder sensor; 12, controller; 13, throttle valve; 14, catapult actuator cylinder; 15, fuel tank; 16, rodless cavity; 17, rod cavity; 18, load. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] An embodiment of a catapult actuating device of the present invention, as Figure 1As shown in the figure, it includes: a fuel tank 15, a first electromagnetic directional control valve 5, a first electro-hydraulic directional control valve 6, two ejection actuators 14, a second electro-hydraulic directional control valve 7, a second electromagnetic directional control valve 8, a hook release actuator 9, a controller 12, an acquisition module, and a drive source; an accumulator 3 is connected to the fuel tank 15, and a first electromagnetic directional control valve 5 is arranged on the pipeline between the accumulator 3 and the fuel tank 15; the inlet of the first electro-hydraulic directional control valve 6 is connected between the outlet of the first electromagnetic directional control valve 5 and the accumulator 3, and the outlet of the first electro-hydraulic directional control valve 6 is respectively communicated with the rodless cavity of the hook release actuator 9, the rod chambers 17 of the two ejection actuators 14, and the rodless chambers 16; wherein, the second electro-hydraulic directional control valve 7 is arranged on the pipeline between the rodless chambers 16 of the two ejection actuators 14 and the outlet of the first electro-hydraulic directional control valve 6; one end of the second electromagnetic directional control valve 8 is communicated with the fuel tank 15, and the other end of the second electromagnetic directional control valve 8 is respectively communicated with the rod chambers 17 and the rodless chambers 16 of the two ejection actuators 14 through pipelines; the drive source is used to drive the oil in the fuel tank 15 to supply oil to the accumulator 3, the rod chambers 17 of the ejection actuators 14, or the rodless chambers 16 of the ejection actuators 14; the controller 12 is used to control the second electro-hydraulic directional control valve 7 to make the accumulator 3 communicate with the rodless chamber 16 of the ejection actuator (14) through the second electro-hydraulic directional control valve 7 when the acquisition module acquires that the hook release actuator 9 releases the hook; and is used to control the second electro-hydraulic directional control valve 7 to make the rodless chamber 16 of the ejection actuator 14 communicate with the fuel tank 15 when the acquisition module acquires that the load 18 on the ejection actuator 14 ejects.

[0034] Specifically, variable throttle valves 13 are arranged at the inlets of the rod chambers 17 and the rodless chambers 16 of the two ejection actuators 14, and the variable throttle valves 13 are used to adjust the flow rate of the oil entering the rod chambers 17 and the rodless chambers 16 of the ejection actuators 14.

[0035] Specifically, the second electromagnetic directional control valve 8 is a three-position four-way valve. Both outlets of the second electromagnetic directional control valve 8 are communicated with the fuel tank 15. One of the inlets of the second electromagnetic directional control valve 8 is respectively communicated with the rod chambers 17 of the two ejection actuators 14, and the pressure relief ports of the second electromagnetic directional control valve 8 are respectively communicated with the rodless chambers 16 of the two ejection actuators 14.

[0036] Specifically, an overflow valve 4 is arranged on the pipeline connecting one of the outlets of the second electromagnetic directional control valve 8 and the fuel tank 15. The overflow valve 4 is electrically connected to the controller 12. The controller 12 is used to open the overflow valve 4 when the accumulator 3 reaches the set pressure when the drive source supplies oil to the accumulator 3, so as to prevent the pressure in the system from being too high.

[0037] Specifically, the second electro-hydraulic directional valve 7 is a three-position three-way valve. The inlet of the second electro-hydraulic directional valve 7 is connected to the pipeline between the hook-opening actuator 9 and the rod chamber 17 of the ejection actuator 14. The inlet of the second electro-hydraulic directional valve 7 is respectively communicated with the rodless chambers 16 of the two ejection actuators 14. The pressure-relief port of the second electro-hydraulic directional valve 7 is communicated with the fuel tank 15.

[0038] Specifically, the first electromagnetic directional valve 5 is a three-position three-way valve. Both the inlet and the pressure-relief port of the first electromagnetic directional valve 5 are communicated with the fuel tank 15. The outlet of the first electromagnetic directional valve 5 is communicated with the accumulator 3.

[0039] Specifically, the drive source includes: a motor 2 and a hydraulic pump 1. The motor 2 is used to drive the hydraulic pump 1 to work. And the hydraulic pump 1 is arranged on the oil inlet pipeline connecting the inlet of the first electromagnetic directional valve 5 and the fuel tank 15, and the oil inlet pipeline is communicated with one of the outlets of the second electromagnetic directional valve 8.

[0040] Specifically, the acquisition module includes: an ejection actuator sensor 11 and a hook-opening actuator sensor 10. Both the ejection actuator sensor 11 and the hook-opening actuator sensor 10 are electrically connected to the controller 12. The hook-opening actuator sensor 10 is used to detect whether the hook-opening actuator 9 opens the hook. The ejection actuator sensor 11 is used to detect whether the load 18 on the ejection actuator 14 ejects. Both the hook-opening actuator sensor 10 and the ejection actuator sensor 11 send the detected information to the controller 12.

[0041] Specifically, the ejection actuator 14 is of a double-body multi-stage form.

[0042] Specific working principle

[0043] The ejection actuating device of the present utility model has five working modes, namely slow lowering mode, slow retracting mode, energy storage mode, ejection mode, and fast recovery mode. Specifically, during aircraft logistics maintenance, the ejection device needs to be slowly lowered, and at this time, the slow lowering mode is adopted to facilitate the loading of ammunition. After the ammunition is loaded, the slow retracting mode is adopted at this time, and the ejection device slowly retracts back to the magazine. Before ejection, the accumulator needs to be charged, that is, enter the energy storage mode. When ejecting, switch to the ejection mode. After ejection, switch to the fast recovery mode to quickly retract the actuator piston rod.

[0044] Such as Figure 2As shown, slow lowering mode: The controller 12 controls the ejection actuator to enter the slow lowering mode. That is, the controller 12 controls the first electromagnetic directional valve 5 to be in the middle position, i.e., the closed state, controls the first electro-hydraulic directional valve 6 to be in the right position, i.e., the closed state, controls the second electro-hydraulic directional valve 7 to be in the middle position, i.e., the closed state, and controls the second electromagnetic directional valve 8 to be in the left position, i.e., port A is connected to port T, and port B is connected to port P. At the same time, the controller 12 controls the motor 2 to work to drive the hydraulic pump 1 to work. The hydraulic pump 1 pumps the oil from the fuel tank 15 into the rodless cavity 16 of the ejection actuator 14 through port A and port T of the second electromagnetic directional valve 8. The rod chamber 17 of the ejection actuator 14 is connected to the fuel tank. The pressure in the rodless cavity 16 is greater than the pressure in the rod chamber 17. The ejection actuator 14 slowly lowers at a small flow rate provided by the hydraulic pump 1.

[0045] As Figure 3 shown, slow retraction mode: The controller 12 controls the ejection actuator to enter the slow retraction mode. That is, the controller 12 controls the first electromagnetic directional valve 5 to be in the middle position, i.e., the closed state, controls the first electro-hydraulic directional valve 6 to be in the right position, i.e., the closed state, controls the second electro-hydraulic directional valve 7 to be in the middle position, i.e., the closed state, and controls the second electromagnetic directional valve 8 to be in the right position, i.e., port A is connected to port P, and port B is connected to port T. At the same time, the controller 12 controls the motor 2 to work to drive the hydraulic pump 1 to work. The hydraulic pump 1 pumps the oil from the fuel tank 15 into the rod chamber 17 of the ejection actuator 14 through port A and port P of the second electromagnetic directional valve 8. The rodless cavity 16 of the ejection actuator 14 is connected to the fuel tank 15. The pressure in the rod chamber 17 is greater than the pressure in the rodless cavity 16. The ejection actuator 14 slowly retracts at a small flow rate provided by the hydraulic pump 1.

[0046] As Figure 4 shown, energy storage mode: The controller 12 controls the ejection actuator to enter the energy storage mode. That is, the controller 12 controls the first electromagnetic directional valve 5 to be in the right position. At this time, port A of the first electromagnetic directional valve 5 is connected to port P. The controller 12 controls the first electro-hydraulic directional valve 6 to be in the right position, i.e., the closed state, controls the second electro-hydraulic directional valve 7 to be in the middle position, i.e., the closed state, and controls the second electromagnetic directional valve 8 to be in the middle position, i.e., the closed state. At this time, the controller 12 controls the motor 2 to work to drive the hydraulic pump 1 to work. The hydraulic pump 1 pumps the oil from the fuel tank 15 into the accumulator 3 through port A and port P of the first electromagnetic directional valve 5 to provide oil for the accumulator 3. When the accumulator 3 reaches the set pressure, the relief valve 4 opens, and the excess oil provided by the hydraulic pump 1 flows back to the fuel tank 15 through the relief valve 4 to prevent the pressure in the system from being too high.

[0047] As Figure 5As shown in the figure, ejection mode: The controller 12 controls the ejection actuator to enter the ejection mode, that is, the controller 12 controls the first electromagnetic directional valve 5 to be in the right position, and the A port of the first electromagnetic directional valve 5 is connected to the P port. The first electro-hydraulic directional valve 6 is controlled to be in the left position, that is, it is opened. At this time, the high-pressure oil in the accumulator 3 flows into the rodless cavity of the hook-opening actuator 9 and the rod cavity 17 of the ejection actuator cylinder 14 respectively. Under the action of the oil pressure, a small upward displacement is generated at the piston at the end of the ejection actuator cylinder 14, separating it from the hook, making the hook-opening smoother. At the same time, the hook-opening actuator 9 moves to complete the hook-opening. When the hook-opening actuator sensor 10 at the end of the hook-opening actuator 9 detects that the hook-opening is completed, it transmits the hook-opening completion signal to the controller 12. At the same time, the controller 12 controls the second electro-hydraulic directional valve 7 to be in the left position, that is, the A port of the second electro-hydraulic directional valve 7 is connected to the P port. The high-pressure oil in the accumulator 3 flows into the rodless cavity 16 of the ejection actuator cylinder 14 through the A port and P port of the second electro-hydraulic directional valve 7. At this time, the pressures on both sides of the piston in the ejection actuator cylinder 14 are the same, but due to the different areas on both sides (that is, the area on the side with the piston rod is smaller than the area on the side without the piston rod), the ejection of the load 18 is completed under the differential action generated by the pressure difference. When the load 18 is ejected, the throttle valves 13 corresponding to the two ejection actuator cylinders 14 can be controlled respectively to control the oil flow rate of the two ejection actuator cylinders 14, and then control the ejection attitude of the load 18.

[0048] As Figure 6 shown in the figure, fast recovery mode: The controller 12 controls the ejection actuator to enter the fast recovery mode, that is, when the ejection actuator sensor 11 at the end of the piston of the ejection actuator cylinder 14 detects that the ejection is completed, it transmits the signal back to the controller 12. At the same time, the controller 12 outputs a signal to control the second electro-hydraulic directional valve 7 to be in the right position, that is, the A port of the second electro-hydraulic directional valve 7 is connected to the T port. At this time, the rodless cavity 16 of the ejection actuator cylinder 14 is connected to the fuel tank 15. Since the pressure in the fuel tank 15 is much lower than the pressure in the accumulator 3, that is, the pressure in the rodless cavity 16 of the ejection actuator cylinder 14 is much lower than the pressure in the rod cavity 17 of the ejection actuator cylinder 14. Under the action of the pressure difference, the oil in the accumulator 3 flows into the rod cavity 17 of the ejection actuator cylinder 14, and the oil in the rodless cavity 16 of the ejection actuator cylinder 14 flows back to the fuel tank 15 through the A port and T port of the second electro-hydraulic directional valve 7 to complete the fast retraction action.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ejection actuating device, characterized in that, Including: a fuel tank (15), a first electromagnetic directional control valve (5), a first electro-hydraulic directional control valve (6), two ejection actuators (14), a second electro-hydraulic directional control valve (7), a second electromagnetic directional control valve (8), a hook-opening actuator (9), a controller (12), a acquisition module, and a drive source; An accumulator (3) is communicated with the fuel tank (15), and a first electromagnetic directional control valve (5) is arranged on the pipeline between the accumulator (3) and the fuel tank (15); The inlet of the first electro-hydraulic directional control valve (6) is connected between the outlet of the first electromagnetic directional control valve (5) and the accumulator (3), and the outlet of the first electro-hydraulic directional control valve (6) is respectively communicated with the rodless cavity of the hook-opening actuator (9), the rod chambers (17) and the rodless chambers (16) of the two ejection actuators (14); wherein, the second electro-hydraulic directional control valve (7) is arranged on the pipeline between the rodless chambers (16) of the two ejection actuators (14) and the outlet of the first electro-hydraulic directional control valve (6); One end of the second electromagnetic directional control valve (8) is communicated with the fuel tank (15), and the other end of the second electromagnetic directional control valve (8) is respectively communicated with the rod chambers (17) and the rodless chambers (16) of the two ejection actuators (14) through pipelines; The drive source is used to drive the oil in the fuel tank (15) to supply oil to the accumulator (3), the rod chambers (17) of the ejection actuators (14) or the rodless chambers (16) of the ejection actuators (14); The controller (12) is used to control the second electro-hydraulic directional control valve (7) to make the accumulator (3) communicate with the rodless chambers (16) of the two ejection actuators (14) through the second electro-hydraulic directional control valve (7) when the acquisition module acquires that the hook-opening actuator (9) opens the hook; and is used to control the second electro-hydraulic directional control valve (7) to make the rodless chambers (16) of the two ejection actuators (14) communicate with the fuel tank (15) when the acquisition module acquires that the load (18) on the ejection actuator (14) ejects.

2. The catapult actuating device according to claim 1, wherein Variable throttle valves (13) are arranged at the inlets of the rod chambers (17) and the rodless chambers (16) of the two ejection actuators (14), and the variable throttle valves (13) are used to adjust the flow rate of the oil entering the rod chambers (17) and the rodless chambers (16) of the ejection actuators (14).

3. The ejection actuating device according to claim 1, characterized in that, The second electromagnetic directional control valve (8) is a three-position four-way valve, both outlets of the second electromagnetic directional control valve (8) are communicated with the fuel tank (15), one inlet of the second electromagnetic directional control valve (8) is respectively communicated with the rod chambers (17) of the two ejection actuators (14), and the pressure relief ports of the second electromagnetic directional control valve (8) are respectively communicated with the rodless chambers (16) of the two ejection actuators (14).

4. The ejection actuating device according to claim 3, characterized in that, An overflow valve (4) is arranged on the pipeline connecting between one outlet of the second electromagnetic directional control valve (8) and the fuel tank (15), and the overflow valve (4) opens when the drive source supplies oil to the accumulator (3) and the accumulator (3) reaches the set pressure.

5. A catapult actuating device according to claim 1, wherein The second electro-hydraulic directional valve (7) is a three-position three-way valve. The inlet of the second electro-hydraulic directional valve (7) is connected to the pipeline between the hook opening actuator (9) and the rod chamber (17) of the ejection actuator cylinder (14). The inlet of the second electro-hydraulic directional valve (7) is respectively communicated with the rodless chambers (16) of the two ejection actuator cylinders (14). The pressure relief port of the second electro-hydraulic directional valve (7) is communicated with the oil tank (15).

6. A catapult actuating device according to claim 1, characterized in that The first electromagnetic directional valve (5) is a three-position three-way valve. Both the inlet and the pressure relief port of the first electromagnetic directional valve (5) are communicated with the oil tank (15). The outlet of the first electromagnetic directional valve (5) is communicated with the accumulator (3).

7. An ejection actuating device according to claim 6, characterized in that, The drive source includes: a motor (2) and a hydraulic pump (1). The motor (2) is used to drive the hydraulic pump (1) to work. And the hydraulic pump (1) is arranged on the oil inlet pipeline connected between the inlet of the first electromagnetic directional valve (5) and the oil tank (15). And the oil inlet pipeline is communicated with one of the outlets of the second electromagnetic directional valve (8).

8. A catapult actuating device according to claim 1, characterized in that, The acquisition module includes: an ejection actuator cylinder sensor (11) and a hook opening actuator sensor (10). Both the ejection actuator cylinder sensor (11) and the hook opening actuator sensor (10) are electrically connected to the controller (12). The hook opening actuator sensor (10) is used to detect whether the hook opening actuator (9) opens the hook. The ejection actuator cylinder sensor (11) is used to detect whether the load (18) on the ejection actuator cylinder (14) is ejected. Both the hook opening actuator sensor (10) and the ejection actuator cylinder sensor (11) send the detected information to the controller (12).

9. A catapult actuating device according to claim 1, wherein The ejection actuator cylinder (14) is of a double-body multi-stage form.

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