阅读说明：本技术 一种液控冲击载荷发射阀 (Hydraulic control impact load transmitting valve ) 是由 邓璐 李想 欧阳斌 马名中 张成亮 马锐锋 郭威 李德南 于 2021-07-29 设计创作，主要内容包括：本发明提供了一种液控冲击载荷发射阀,包括主阀体,主阀体顶部设置有发射动力输出口,发射动力输出口与外部相连通；主阀体内部设置有压力腔室,压力腔室与发射动力输出口相连通；压力腔室用于接入外部的液压油或者液压气作为发射动力；主阀体内部还设置有主阀芯；主阀芯的顶部卡设套接于发射动力输出口内部；主阀芯的中部与压力腔室相配合形成封闭的环形腔室；主阀芯的底部卡设套接于主阀体底部内且两者接触面紧密贴合；主阀体底面设置有主阀盖,主阀盖与主阀芯的第一盲孔的内壁和主阀体底部内壁形成封闭结构。本发明适用于按照预设的曲线输出液压或气压动力来发射中高速冲击载荷,使负载按照设定的规律运动。(The invention provides a hydraulic control impact load transmitting valve which comprises a main valve body, wherein a transmitting power output port is arranged at the top of the main valve body and communicated with the outside; a pressure chamber is arranged in the main valve body and communicated with the launching power output port; the pressure chamber is used for being connected with external hydraulic oil or hydraulic gas to serve as launching power; a main valve core is also arranged in the main valve body; the top of the main valve core is clamped and sleeved inside the launching power output port; the middle part of the main valve core is matched with the pressure chamber to form a closed annular chamber; the bottom of the main valve core is clamped and sleeved in the bottom of the main valve body, and the contact surfaces of the main valve core and the main valve body are tightly attached; the bottom surface of the main valve body is provided with a main valve cover, and the main valve cover, the inner wall of the first blind hole of the main valve core and the inner wall of the bottom of the main valve body form a closed structure. The invention is suitable for transmitting medium-high speed impact load by outputting hydraulic or pneumatic power according to a preset curve, so that the load moves according to a set rule.)

1. A hydraulically controlled impact load launching valve is characterized in that: the valve comprises a main valve body, wherein the top of the main valve body is provided with a transmitting power output port which is communicated with the outside; a pressure chamber is arranged in the main valve body and communicated with the launching power output port; the diameter of the launching power output port is smaller than that of the pressure chamber; the pressure chamber is used for being connected with external hydraulic oil or hydraulic gas to serve as launching power; a main valve core is also arranged in the main valve body; the top of the main valve core is clamped and sleeved inside the launching power output port; the middle part of the main valve core is matched with the pressure chamber to form a closed annular chamber; the bottom of the main valve core is clamped and sleeved in the bottom of the main valve body, and the contact surfaces of the main valve core and the main valve body are tightly attached; the diameter of the top of the main valve core is smaller than the diameters of the middle part and the bottom of the main valve core; the diameters of the middle part and the bottom part of the main valve core are the same; the main valve core is coaxially provided with a first blind hole with a downward opening; the bottom surface of the main valve body is provided with a main valve cover, and the main valve cover, the inner wall of the first blind hole of the main valve core and the inner wall of the bottom of the main valve body form a closed structure; the device also comprises a first spring; the top end of the first spring is fixedly connected with the top surface of the first blind hole of the main valve core, and the other end of the first spring is fixed with the upper surface of the main valve cover; the launching power enters the pressure chamber and acts on the top end of the middle part of the main valve core to generate downward pressure so that the main valve core moves downward, and the top of the main valve core enters the pressure chamber so that the pressure chamber of the main valve body is communicated with the outside through a launching power output port and outputs the launching power.

2. The hydraulically controlled shock load launching valve of claim 1, wherein: the top of the main valve core is provided with a special hole, one end opening of the special hole is positioned on the top surface of the main valve core, and the other end opening of the special hole is positioned on the side surface of the main valve core; after the top of the main valve core enters the pressure chamber, the special-shaped hole is used for communicating the pressure chamber with the outside.

3. The hydraulically controlled shock load launching valve of claim 1, wherein: and the main valve cover is provided with a control oil way interface for guiding hydraulic oil for controlling the action of the launching valve into the bottom of the main valve core.

4. The hydraulically controlled shock load launching valve of claim 1, wherein: the hydraulic buffer also comprises a primary buffer piston, a second spring, a connecting flange and a buffer cylinder; the buffer cylinder is coaxially fixed on the bottom surface of the main valve body through a connecting flange; the top end of the primary buffer piston is fixed on the top surface of a first blind hole of the main valve core, and the first spring is sleeved on the outer side of the primary buffer piston; the bottom end of the primary buffer piston is arranged in the buffer cylinder; the top end of the second spring is fixedly connected with the bottom surface of the first-stage buffer piston, and the bottom end of the second spring is fixedly connected with the bottom surface of the buffer cylinder.

5. The hydraulically controlled shock load launching valve of claim 4, wherein: the primary buffer piston is of a stepped structure with the diameter of the bottom larger than that of the middle part; the bottom of the primary buffer piston is in close contact with the inner wall of the lower side of the buffer cylinder, and the bottom surface of the primary buffer piston is matched with the inner wall and the bottom surface of the lower side of the buffer cylinder to form a closed cavity; the outer surface of the middle part of the primary buffer piston is matched with the inner wall of the upper side of the buffer cylinder and the top surface of the buffer cylinder to form a closed cavity; the first-stage buffer piston is coaxially provided with a second blind hole with a downward opening; the wall body of the second blind hole is provided with a buffer cylinder used for communicating the outer side of the primary buffer piston and a drainage hole inside the second blind hole; the drainage hole is positioned in the middle of the primary buffer piston; orifices which are communicated with each other through pipelines positioned outside the buffer cylinder are respectively arranged on the upper inner wall and the lower inner wall of the buffer cylinder; and hydraulic oil is arranged at the bottom of the buffer cylinder.

6. The hydraulically controlled shock load launching valve of claim 5, wherein: the top end of the second-stage buffer piston is coaxially arranged inside the second blind hole of the first-stage buffer piston, the bottom end of the second-stage buffer piston is fixed on the bottom surface of the buffer cylinder, and the second spring is sleeved on the outer side of the second-stage buffer piston; the head of the secondary buffer piston is of a frustum structure; the top of the second blind hole is of an inverted conical structure; the diameter of the top surface of the head of the secondary buffer piston is smaller than the diameter of the bottom surface of the top of the second blind hole.

7. The hydraulically controlled shock load launching valve of claim 6, wherein: an adjusting gasket is arranged between the bottom end of the secondary buffer piston and the bottom surface of the buffer cylinder.

8. The hydraulically controlled shock load launching valve of claim 1, wherein: the outer surface of the middle part of the main valve core is provided with an annular groove.

9. The hydraulically controlled shock load launching valve of claim 5, wherein: and a speed regulating valve is arranged on the pipeline positioned outside the buffer cylinder.

10. The hydraulically controlled shock load launching valve of claim 5, wherein: the control oil way interface connection is with outside oil inlet pipeline, be provided with the switching-over valve on the oil inlet pipeline.

Technical Field

The invention belongs to the technical field of hydraulic control, and particularly relates to a hydraulic control impact load launching valve.

Background

The impact load launching device using hydraulic pressure or air pressure as power usually needs to respond to a launching command in a short time and output hydraulic pressure or air pressure power according to a preset regular curve, and the output regular of the air pressure power can be realized by a launching valve.

A typical pneumatic-hydraulic launching device mainly comprises a pneumatic or hydraulic power source, an electromagnetic reversing valve, a variable flow valve and accessories thereof. However, the following disadvantages are common to such a pneumatic-hydraulic injection device: firstly, the impact overload is large, and the launching process is uncontrollable; secondly, the emission acceleration distance is long, and the deceleration is slow; and thirdly, the requirement of medium and high speed launching is difficult to meet.

Disclosure of Invention

The invention aims to solve the defects of the background technology, and provides a hydraulic control impact load launching valve which is particularly suitable for outputting hydraulic or pneumatic power according to a preset curve to launch medium-high speed impact load so as to enable the load to move according to a set rule.

The technical scheme adopted by the invention is as follows: a hydraulic control impact load launching valve comprises a main valve body, wherein a launching power output port is arranged at the top of the main valve body and communicated with the outside; a pressure chamber is arranged in the main valve body and communicated with the launching power output port; the diameter of the launching power output port is smaller than that of the pressure chamber; the pressure chamber is used for being connected with external hydraulic oil or hydraulic gas to serve as launching power; a main valve core is also arranged in the main valve body; the top of the main valve core is clamped and sleeved inside the launching power output port; the middle part of the main valve core is matched with the pressure chamber to form a closed annular chamber; the bottom of the main valve core is clamped and sleeved in the bottom of the main valve body, and the contact surfaces of the main valve core and the main valve body are tightly attached; the diameter of the top of the main valve core is smaller than the diameters of the middle part and the bottom of the main valve core; the diameters of the middle part and the bottom part of the main valve core are the same; the main valve core is coaxially provided with a first blind hole with a downward opening; the bottom surface of the main valve body is provided with a main valve cover, and the main valve cover, the inner wall of the first blind hole of the main valve core and the inner wall of the bottom of the main valve body form a closed structure; the device also comprises a first spring; the top end of the first spring is fixedly connected with the top surface of the first blind hole of the main valve core, and the other end of the first spring is fixed with the upper surface of the main valve cover; the launching power enters the pressure chamber and acts on the top end of the middle part of the main valve core to generate downward pressure so that the main valve core moves downward, and the top of the main valve core enters the pressure chamber so that the pressure chamber of the main valve body is communicated with the outside through a launching power output port and outputs the launching power.

In the technical scheme, a special-shaped hole is formed in the top of the main valve core, an opening at one end of the special-shaped hole is located on the top surface of the main valve core, and an opening at the other end of the special-shaped hole is located on the side surface of the main valve core; after the top of the main valve core enters the pressure chamber, the special-shaped hole is used for communicating the pressure chamber with the outside.

In the above technical solution, the main valve cover is provided with a control oil path interface for guiding hydraulic oil for controlling the operation of the launching valve into the bottom of the main valve core.

In the technical scheme, the hydraulic buffer device further comprises a primary buffer piston, a second spring, a connecting flange and a buffer cylinder; the buffer cylinder is coaxially fixed on the bottom surface of the main valve body through a connecting flange; the top end of the primary buffer piston is fixed on the top surface of a first blind hole of the main valve core, and the first spring is sleeved on the outer side of the primary buffer piston; the bottom end of the primary buffer piston is arranged in the buffer cylinder; the top end of the second spring is fixedly connected with the bottom surface of the first-stage buffer piston, and the bottom end of the second spring is fixedly connected with the bottom surface of the buffer cylinder.

In the technical scheme, the primary buffer piston is of a stepped structure with the diameter of the bottom larger than that of the middle part; the bottom of the primary buffer piston is in close contact with the inner wall of the lower side of the buffer cylinder, and the bottom surface of the primary buffer piston is matched with the inner wall and the bottom surface of the lower side of the buffer cylinder to form a closed cavity; the outer surface of the middle part of the primary buffer piston is matched with the inner wall of the upper side of the buffer cylinder and the top surface of the buffer cylinder to form a closed cavity; the first-stage buffer piston is coaxially provided with a second blind hole with a downward opening; the wall body of the second blind hole is provided with a buffer cylinder used for communicating the outer side of the primary buffer piston and a drainage hole inside the second blind hole; the drainage hole is positioned in the middle of the primary buffer piston; orifices which are communicated with each other through pipelines positioned outside the buffer cylinder are respectively arranged on the upper inner wall and the lower inner wall of the buffer cylinder; and hydraulic oil is arranged at the bottom of the buffer cylinder.

In the technical scheme, the hydraulic buffer device further comprises a secondary buffer piston, wherein the top end of the secondary buffer piston is coaxially arranged inside the second blind hole of the primary buffer piston, the bottom end of the secondary buffer piston is fixed on the bottom surface of the buffer cylinder, and a second spring is sleeved on the outer side of the secondary buffer piston; the head of the secondary buffer piston is of a frustum structure; the top of the second blind hole is of an inverted conical structure; the diameter of the top surface of the head of the secondary buffer piston is smaller than the diameter of the bottom surface of the top of the second blind hole.

Among the above-mentioned technical scheme, be provided with adjusting shim between the bottom of second grade buffer piston and the bottom surface of cushion cylinder.

In the technical scheme, the outer surface of the middle part of the main valve core is provided with the annular groove.

In the technical scheme, the pipeline positioned outside the buffer cylinder is provided with the speed regulating valve.

In the technical scheme, the control oil way interface is connected with an external oil inlet pipeline, and a reversing valve is arranged on the oil inlet pipeline.

The invention has the beneficial effects that: according to the invention, through research and setting of the special hole of the main valve element and the buffer, the special hole and the buffer work cooperatively, so that hydraulic oil or high-pressure air output by the launching power source can be controlled to be injected into the load executing mechanism according to a certain rule, thereby ensuring that the pressure required by the launching load changes according to a set curve and realizing the controllability of the launching process. The invention releases the launching power at a first-speed and a second-speed by the design of two-stage buffer function, thereby meeting the requirement of high-speed impact load launching. The buffer is internally provided with the closed oil cavity filled with hydraulic oil all the time, so that the lubrication among buffer elements is improved, the motion clamping stagnation is not easy to occur, most importantly, a self-circulation hydraulic system is formed in the cylinder barrel by arranging the small holes on the side wall of the buffer cylinder and the small holes on the first-stage buffer piston, oil does not need to be supplemented, and the oil flow required to be supplied by an external oil source is greatly reduced. The invention has the function of emergency braking, and when the emergency stop is needed in the launching process, the launching interruption can be realized only by utilizing the electromagnetic directional valve to emergently close the launching power oil circuit (or the air circuit) and open the control oil circuit. The invention integrates the functions of the launching valve and the buffer into one valve body, greatly reduces the volume of the launching valve and reduces the preparation cost.

Drawings

Fig. 1 is a schematic structural view of a pilot-controlled impact load launching valve of the present invention.

Fig. 2 is a schematic view of the main valve body oil (gas) line interface of the present invention.

FIG. 3 is a schematic view of a main poppet configuration of the present invention.

Fig. 4 is a schematic structural diagram of a one-stage buffer piston of the invention.

FIG. 5 is a schematic view of a damper orifice of the present invention.

FIG. 6 is a schematic view of the structure of the two-stage damping piston of the present invention.

FIG. 7 is a schematic view of the lower edge annular pressure equalization groove of the output port of the main valve body launching power.

Fig. 8 is a hydraulic schematic diagram of an impact load emitting device according to the present invention.

Wherein, 1-main valve body, 2-main valve core, 3-first spring, 4-main valve cover, 5-first level buffer piston, 6, 7-bolt, 8-connecting flange, 9-buffer cylinder, 10-second level buffer piston, 11-second spring, 12-adjusting gasket, 13-transmitting power output port, 14-interface of transmitting power source, 15-control oil circuit interface, 16-transmitting pressure area, 17-control pressure area, 18-special hole, 19-ring groove, 20, 21-orifice, 22-drainage hole, 23-ring pressure equalizing groove, 24-hydraulic pump station, 25-transmitting valve locking accumulator, 26, 27, 28, 29-electromagnetic reversing valve, 30-load transmitting executing mechanism, 31-transmitting power accumulator, 32-a hydraulic control impact load valve, 33-a speed regulating valve, 34-an oil tank, 35-a first blind hole and 36-a second blind hole.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 1, the present invention provides a hydraulic control impact load launching valve, which comprises a launching main valve and a buffer, wherein the launching main valve is arranged at the upper part of the launching valve and used for controlling an oil path or an air path from a launching power source to a load launching actuating mechanism; the lower part of the launching valve is provided with a buffer which is used for controlling the speed and the size of the launching power output.

Wherein: the launching main valve comprises a main valve body 1, a main valve core 2, a first spring 3, a main valve cover 4 and the like; the buffer comprises a primary buffer piston 5, bolts 6 and 7, a connecting flange 8, a buffer cylinder 9, a secondary buffer piston 10, a second spring 11, an adjusting gasket 12 and the like. The connecting flange 8 is used as a cylinder cover of the buffer cylinder to realize the sealing of the buffer, and is also used as a connecting flange of the launching main valve and the buffer to realize the rigid connection and the functional matching of the launching main valve and the buffer.

The top of the main valve body 1 is provided with a transmitting power output port 13, and the transmitting power output port 13 is communicated with an external load; a pressure chamber is arranged in the main valve body and communicated with the launching power output port; the diameter of the launch power outlet 13 is smaller than the pressure chamber; the pressure chamber is used for being connected with external hydraulic oil or hydraulic gas to serve as launching power; a main valve core 2 is also arranged in the main valve body 1; the top of the main valve core 2 is clamped and sleeved inside the launching power output port 13; the middle part of the main valve core 1 is matched with the pressure chamber to form a closed annular chamber; the bottom of the main valve core 1 is clamped and sleeved in the bottom of the main valve body, and the contact surfaces of the main valve core and the main valve body are tightly attached; the diameter of the top of the main valve core 1 is smaller than the diameters of the middle part and the bottom of the main valve core 1; the diameters of the middle part and the bottom part of the main valve core 1 are the same; the main valve element 1 is coaxially provided with a first blind hole 35 which is opened downwards; the bottom surface of the main valve body 1 is provided with a main valve cover 4, and the main valve cover 4, the inner wall of the first blind hole 35 of the main valve core and the inner wall of the bottom of the main valve body form a closed structure; further comprises a first spring 3; the top end of the first spring 3 is fixedly connected with the top surface of the first blind hole 35 of the main valve core, and the other end of the first spring 3 is fixed with the upper surface of the main valve cover 4.

The interior of main valve body 1 is an annular pressure chamber, after the hydraulic oil or pressure gas as launching power is fed into said pressure chamber, it can act on the shoulder area of main valve core 2 to produce downward pressure, when the downward pressure on main valve core 2 is greater than the upward pressure acted on valve core 2 by control oil circuit and springs 3 and 11, main valve core 2 can be started to move downwards, and the launching power outlet 13 of main valve body 1 is opened to output pneumatic hydraulic power. The bottom of the buffer is provided with an adjusting gasket 12, and the position of the secondary buffer piston 9 can be adjusted according to the actual emission working condition, so that the damping coefficient of the buffer is adjusted. The connecting flange 8 is used as a cylinder cover of the buffer cylinder 9 to realize the sealing of the buffer, and is also used as a connecting flange of the launching main valve and the buffer to realize the rigid connection and the functional matching of the launching main valve and the buffer.

Fig. 2 shows a schematic diagram of the main valve body 1 oil gas path interface of the invention. The main valve body 1 provides an interface 14 with a launching power source and an interface with a launching load, namely a launching power output port 13; the main valve core 2 is positioned in the main valve body 1, and controls the opening and closing of the launching valve and a port 13 of a launching load by moving up and down, so that the gas and the liquid pressure input into the main valve body are output to an actuating mechanism according to a preset curve; first spring 3 is located within main spool 2 and precompresses to apply an upward thrust to maintain the upward closed state of main spool 2; the first spring 3 is matched with the control oil way to maintain the closing state of the main valve core, and meanwhile, when the system launching pressure and the control oil way pressure are not established, the valve core is maintained to be always in the closing state so as to ensure the stability of the output pressure of the launching main valve, and the main valve core 2 is restored to the closing state after the system finishes one-time launching. The main valve cover 4 forms a closed pressure space 17 between the main valve core 2 and the main valve cover 4, and the main valve cover 4 is provided with a control oil path interface 15 for guiding hydraulic oil for controlling the operation of the launching valve to the bottom of the main valve core 2, and the main valve core 2 is jacked up to enable the output port 13 for launching power to be in a closed state, so that the space in the main valve body 1 is divided into an upper launching pressure area 16 (namely a pressure chamber) and a lower control pressure area 17.

As shown in FIG. 3, main valve element 2 is an inverted cup-shaped structure, and 4 special-shaped holes 18 are formed in the upper portion of main valve element 2, one end of each special-shaped hole 18 is open and located on the top surface of main valve element 2, and the other end of each special-shaped hole 18 is open and located on the side surface of the main valve element. When the main valve element 2 does not act, the first spring 3 and the control oil path exert upward thrust to seal the transmitting power output port 13, and at the moment, the transmitting valve cannot output transmitting power. Along with the downward movement of the main valve element 2, the special-shaped hole 18 gradually exposes the emission pressure area 16, the emission pressure area 16 is communicated with the emission power output port 13, the emission power is output, and along with the downward movement of the valve element 2, the exposed gap area of the special-shaped hole 18 is gradually increased, the output emission power is also gradually increased. The outer surface of the middle of the main valve element 2 is provided with an annular groove 18, and the downward pressure area of the valve element is increased through the annular groove to further improve the response speed of the valve element. As shown in fig. 7, an annular pressure equalizing groove 23 is added at the lower edge of the launching power output port 13 to keep the pressure balance of the upper end surface of the main valve element 2, so as to avoid valve element clamping stagnation caused by uneven local stress on the upper end surface of the main valve element 2 in the downward movement process of the main valve element 2.

As shown in fig. 4, the top end of the primary buffer piston 5 is fixed to the top surface of the first blind hole 35 of the main valve element, and the first spring 3 is sleeved on the outer side of the primary buffer piston 5; the bottom end of the primary buffer piston 5 is arranged in the buffer cylinder 9; the top end of the second spring 11 is fixedly connected with the bottom surface of the primary buffer piston 5, and the bottom end of the second spring 11 is fixedly connected with the bottom surface of the buffer cylinder 9. The top end of the secondary buffer piston 10 is coaxially arranged inside the second blind hole 36 of the primary buffer piston, the bottom end of the secondary buffer piston 10 is fixed on the bottom surface of the buffer cylinder 9, and the second spring 11 is sleeved on the outer side of the secondary buffer piston 10; the head of the secondary buffer piston 10 is of a frustum structure; the top of the second blind hole 26 is of an inverted conical structure; the diameter of the top surface of the head of the secondary buffer piston is smaller than the diameter of the bottom surface of the top of the second blind hole. The wall body of the second blind hole 36 is provided with a drainage hole 22 for communicating the buffer cylinder outside the primary buffer piston with the interior of the second blind hole.

The top piston rod of the primary buffer piston is in contact fit with the main valve element 2, power generated when the main valve element 2 moves downwards is transmitted to the buffer, the piston head at the lower part of the primary buffer piston is of an inverted cup-shaped structure, the excircle of the piston head of the primary buffer piston is matched with the inner circle of the buffer cylinder 9 to form a primary buffer structure, and the inner circle of the piston head cup-shaped structure is matched with the secondary buffer piston 10 to form a secondary buffer structure. The cup-shaped wall of the piston head is provided with 2 drainage holes 22, when the primary buffer piston 5 moves downwards, part of hydraulic oil at the lower part of the cylinder barrel of the buffer cylinder is pressed into the upper part of the buffer cylinder through the 2 drainage holes 22, and meanwhile, the head of the secondary buffer piston 10 can conveniently enter the cup-shaped structure inner cavity of the piston head of the primary buffer piston 5 to realize the stable transition between the two-stage buffering. The second spring 11 maintains the first-stage buffer piston rod 5 and the main valve core 2 in a contact state all the time when the system launching pressure is not established so as to ensure the stability of the launching main valve output pressure and the stability of the buffering process, and the first-stage buffer piston 5 is restored to the initial state after the system finishes one-time launching.

As shown in fig. 5, orifices 20 and 21 are opened on the side wall of the buffer cylinder 9, a pipeline positioned outside the buffer cylinder is connected between 2 orifices, the pipeline is provided with a speed regulating valve 33 for regulating the buffer speed, and the cylinder barrel is filled with hydraulic oil to form a self-circulation hydraulic system. When the main valve element 2 is opened, the main valve element 2 pushes the primary buffer piston 5 to move downwards, hydraulic oil at the lower part of a cylinder barrel of the buffer cylinder is pressed into the upper part of the buffer cylinder through orifice holes 20 and 21 on the side wall of the buffer cylinder, and the movement speed of the primary buffer piston is adjusted through a speed regulating valve 33, so that primary buffering is realized; when the primary buffer piston 5 continues to move downwards, the head of the secondary buffer piston 10 gradually enters the piston head cup-shaped structure inner cavity of the primary buffer piston 5, and a hydraulic cushion is formed in the closed space of the inner cavity.

As shown in fig. 6, the piston head of the secondary buffer piston 10 is designed to be a frustum structure, the depth of the head of the secondary buffer piston 10 entering the piston head cup-shaped structure inner cavity of the primary buffer piston 5 gradually increases, the gap between the head of the secondary buffer piston 10 and the piston head cup-shaped structure inner cavity of the primary buffer piston also gradually becomes smaller, the damping of throttling buffering also gradually increases, and the primary buffer piston 5 finally stops moving downwards under the combined action of the second spring 11, so that the secondary buffering of the opening speed of the main valve element 2 is realized, and the opening process of the launching valve is firstly fast and then slow.

Fig. 8 shows an application scenario of a specific embodiment. The implementation is simplified, the complexity of the system is reduced, and the control oil path and the launching power oil path can share one hydraulic pump station 24. The internal hydraulic oil source of the control oil circuit and the hydraulic pump station 24 or the oil tank 34. The control oil path is connected to a control oil path interface 15 of the launching valve after being pressurized by the launching valve locking accumulator 25, and the electromagnetic directional valves 26-29 control the on-off of the control oil path so as to control the on-off of the main valve core 2 of the launching valve; the launching power oil path is connected to the interface 14 of the launching power source of the launching valve after being pressurized by the launching power accumulator 31. Under the action of the control oil circuit, the main valve core is opened according to a preset rule to output the transmitting power hydraulic oil to the load transmitting executing mechanism 30, and the matching of transmitting load and design input is realized through the oil cylinder of the load transmitting executing mechanism and the control valve in the impact load transmitting unit.

Those not described in detail in this specification are within the skill of the art.