WO2014114195A1

WO2014114195A1 - Fusiform self-locking control valve and fusiform self-locking jet-flow control device

Info

Publication number: WO2014114195A1
Application number: PCT/CN2014/070439
Authority: WO
Inventors: 周跃平
Original assignee: Zhou Yueping
Priority date: 2013-01-25
Filing date: 2014-01-10
Publication date: 2014-07-31

Abstract

Disclosed are a fusiform self-locking control valve and a fusiform self-locking jet-flow control device, wherein a two-way fusiform selecting and sealing seat is formed by means of a valve core sealing seat (104) and a valve core seat (102), and a valve core (2) can move in a valve core chamber (106) under the acting force of a fluid, and create self-locking and sealing by cooperating respectively with a valve core seat channel (102a) in the valve core seat (102) and a push rod chamber (104a) in the valve core sealing seat (104), thereby preventing fluid leakage, while facilitating independent servicing of one side of the valve core seat channel or one side of the push rod chamber.

Description

Shuttle-shaped self-locking control valve and shuttle-shaped self-locking jet control device

Technical field

The invention relates to a shuttle-shaped self-locking control valve and a shuttle-shaped self-locking jet control device for controlling fluid movement of a fluid system.

Background technique

The cut-off switch in the related art is mainly used for controlling the bidirectional movement of the fluid, and some is also used for adjusting the control. The spool and the control mechanism of most of the shut-off valves are usually rigidly connected, and the valve is worn due to the movement of the control mechanism, resulting in the valve. The core is not tightly closed. In addition, when the existing shut-off valve is in the fully open state, the control mechanism is still subjected to the pressure of the fluid, which may easily cause deformation of the control mechanism.

In the prior art, two patents applied to the faucet adopt a non-rigid connection scheme, and the publications are 202140615U and 202280846U, respectively. The scheme of 202140615U adopts a porcelain valve core plane seal, and the control mechanism will also generate leakage after a long use time; The 202280846U solution uses a ball seal, but it uses a ball bowl control mechanism to control the ball. The ball bowl is not effective, and there is no sealing device on the control mechanism. The fluid is easily leaked from the control handle mechanism. In addition, the ball bowl is in the high pressure fluid. The system is easy to deform, and it is difficult to achieve the positioning of the ball and the sealing of the channel after the ball bowl is deformed, and the push rod of the ball and the ball is prevented from being loosened by the end cover.

In the existing non-rigid connection scheme, the stop valve replaces the seal on the end cover and the push rod, which is very inconvenient and needs to close the switch main gate. Therefore, the existing shut-off valve scheme is inconvenient in maintenance. Existing fluid control valves also generally use a shut-off spool structure to regulate flow or pressure, as well as existing shut-off valves.

The shuttle valve on the existing fluid equipment is used for the automatic selection of the two oil supply pressure oil passages. According to the pressure of the two oil supply pressure oil passages acting on the two ends of the valve core, one of the pressure oil supply passages is selected as the shuttle valve. When the pressure of the oil outlet is greater than the pressure of the two oil supply passages, the shuttle valve cannot effectively control the self-locking seal of one of the oil passages, and cannot be used for a shut-off valve or the like. The existing hydraulic lock valve is used for the pressure holding of the working oil through the self-locking seal between the valve core and the valve core seat, and the self-locking seal of the passage between the valve core and the valve core seat is released by controlling the oil passage. When the pressure of the self-locking oil passage is too high, and the maximum working pressure of the control oil passage is too small, the self-locking seal of the passage between the valve core and the valve core seat cannot be opened, which is liable to cause malfunction; the control oil passage of the existing cartridge valve There is also no self-locking seal. When the cartridge valve and the hydraulic lock are repaired, the working oil passage also has leakage of the working fluid; the existing reversing valve spool needs to control the switching between the plurality of oil passage chambers, the spool length and the valve body. The structure is complex and bulky.

Summary of the invention

The technical problem to be solved by the present invention is to provide a shuttle-shaped self-locking control valve and a shuttle-shaped self-locking jet flow control device.

The technical solution adopted by the invention to solve the technical problem is: constructing a shuttle-shaped self-locking control valve, comprising a valve body mechanism and a ball, and the valve body mechanism comprises a main channel, a valve core seat and a push core switch, The valve body mechanism further includes a valve core sealing seat, the pusher core switch includes a push rod, and the valve core sealing seat is provided with a push rod cavity for mounting the push rod, and the push rod is from the valve core The outer side of the sealing seat is assembled in the push rod cavity; The valve core sealing seat, the push core switch, the valve core seat and the main passage form a valve core cavity; the valve core cavity is in communication with the push rod cavity; the ball is assembled between the valve core sealing seat and the valve core seat In the spool cavity; The spool seat is provided with a spool seat passage for fluid to enter the spool chamber; a movement stroke of the ball in the valve core cavity is smaller than a length of the push rod; a diameter of the ball is larger than a diameter of the push rod cavity; a diameter of the ball is larger than a spool on the valve core seat The diameter of the seat channel; The valve plug sealing seat and the valve core seat form a two-way shuttle-shaped selective sealing seat, the ball is pressed against the valve core sealing seat by fluid pushing, and the ball forms a self-locking with the valve core sealing seat Sealing and cutting the force between the push rod and the ball reduces the deformation of the push rod and prevents fluid from leaking from the push rod.

The invention also provides a shuttle-shaped self-locking control valve, comprising a valve body mechanism and a valve core, wherein the valve body mechanism comprises a main passage, a valve core seat and a push core switch, The valve body mechanism further includes a valve core sealing seat, the pusher core switch includes a push rod, and the valve core sealing seat is provided with a push rod cavity for mounting the push rod, and the push rod is from the valve core The outer side of the sealing seat is assembled in the push rod cavity; The valve core sealing seat, the push core switch, the valve core seat and the main passage form a valve core cavity; the valve core cavity is in communication with the push rod cavity; the valve core is assembled in the valve core sealing seat and the valve core seat Between the spool chambers; The spool seat is provided with a spool seat passage for fluid to enter the spool chamber; The spool sealing seat has a first guiding cavity, the valve core is assembled in the first guiding cavity; the maximum diameter of the spool is larger than the diameter of the pusher cavity; the maximum diameter of the spool is larger than The diameter of the spool seat passage on the spool seat; The spool sealing seat and the valve core seat form a two-way shuttle-shaped selective sealing seat, and the valve core is pressed against the valve core sealing seat along the first guiding cavity by fluid pushing, the valve core and the valve core The spool seal seat forms a self-locking seal and cuts off the force between the push rod and the spool to reduce deformation of the push rod and prevent fluid from leaking from the push rod.

The invention also provides a shuttle-shaped self-locking control valve, comprising a valve body mechanism and a valve core, wherein the valve body mechanism comprises a main passage, a valve core seat and a push core switch, The valve body mechanism includes a valve core sealing seat, the pusher core switch includes a push rod, and the valve core sealing seat is provided with a push rod cavity for mounting the push rod, and the push rod is sealed from the valve core The outer side of the seat is assembled in the push rod cavity; The valve core sealing seat, the push core switch, the valve core seat and the main passage form a valve core cavity; the valve core cavity is in communication with the push rod cavity; the valve core is assembled in the valve core sealing seat and the valve core seat Between the spool chambers; The spool seat is provided with a spool seat passage for fluid to enter the spool chamber; The valve core has a guiding hole, the valve core sealing seat has a guiding end, the guiding hole is sleeved at the guiding end; the movement stroke of the valve core in the valve core cavity is smaller than the length of the push rod; a maximum diameter of the spool is greater than a diameter of the push rod chamber; a maximum diameter of the spool is greater than a diameter of a spool seat passage on the spool seat; The spool sealing seat and the valve core seat form a two-way shuttle-shaped selective sealing seat, and the valve core is pressed against the valve core sealing seat by fluid pushing along the guiding end, the valve core and the valve core The spool seal seat forms a self-locking seal and cuts off the force between the push rod and the spool to reduce deformation of the push rod and prevent fluid from leaking from the push rod.

The invention also provides a shuttle-shaped self-locking control valve, comprising a valve body mechanism and a valve core, wherein the valve body mechanism comprises a main passage, a valve core seat and a push core switch, The valve body mechanism includes a valve core sealing seat, the pusher core switch includes a push rod, and the valve core sealing seat is provided with a push rod cavity for mounting the push rod, and the push rod is sealed from the valve core The outer side of the seat is assembled in the push rod cavity; The valve core sealing seat, the push core switch, the valve core seat and the main passage form a valve core cavity; the valve core cavity is in communication with the push rod cavity; the valve core is assembled in the valve core sealing seat and the valve core seat Between the spool chambers; The spool seat is provided with a spool seat passage for fluid to enter the spool chamber; The main passage has a guide rail, and the valve core is assembled on the guide rail; the movement stroke of the valve core in the valve core cavity is smaller than the length of the push rod; the maximum diameter of the spool is larger than the push rod cavity Diameter; a maximum diameter of the spool is greater than a diameter of a spool seat passage on the spool seat; The spool sealing seat and the valve core seat form a two-way shuttle-shaped selective sealing seat, and the valve core is pressed on the valve core sealing seat along a guiding passage under fluid pushing, the valve core and the valve core The seal seat forms a self-locking seal that prevents fluid from leaking from the push rod.

The invention also provides a shuttle-shaped self-locking jet control device, comprising a valve body mechanism, one or more valve cores, the valve body mechanism comprising a main passage, one or more valve core seats, The valve body mechanism includes one or more valve plug seal seats, the valve core seal seat having a seal seat passage for fluid circulation, the valve plug seal seat, the spool seat, the main passage forming one or One or more spool chambers, the spool being assembled in the spool chamber between the spool seal seat and the spool seat, the spool seat having a spool seat passage for fluid communication; The valve body mechanism includes one or more low pressure jet passages, the low pressure jet passage passage is composed of a seal seat passage of the spool seal seat; or consists of a spool seat passage on the spool seat; or The spool seat passage on the spool seat constitutes a portion of one or more of the low pressure jet passages and the seal seat passage of the spool seal seat constitutes one or more other portions of the low pressure jet passage; The shuttle-shaped self-locking jet control device further includes one or more jet switches, the jet switch being mounted on the low-pressure jet channel; The maximum diameter of the spool is larger than the diameter of the seal seat passage; the maximum diameter of the spool is larger than the diameter of the spool seat passage on the spool seat; The spool sealing seat and the valve core seat form a two-way shuttle-shaped selective sealing seat, the jet switch controls opening and closing of the low-pressure jet channel, and the valve core is pressed against the valve core under fluid pushing A self-locking seal is formed on the seat or the valve plug seat to prevent fluid from leaking from the valve plug seal seat or the valve plug seat.

The shuttle-shaped self-locking control valve and the shuttle-shaped self-locking jet flow control device embodying the invention have the following beneficial effects: a two-way shuttle-shaped selective sealing seat is formed by the valve core sealing seat and the valve core seat, and the valve core is in the valve under the action of the fluid The core cavity moves and forms a self-locking seal with the valve seat passage and the valve core sealing seat respectively to prevent fluid leakage, and facilitates maintenance of the shuttle-shaped self-locking control valve and the shuttle-shaped self-locking jet control device, thereby improving work efficiency.

In the shuttle-shaped self-locking control valve and the shuttle-shaped self-locking jet control device, the self-locking seal between the valve core and the spool chamber is opened by the pressure of the oil passage or the push rod, and the push rod is separated from the spool when the lock is self-locking and sealing. It does not bear the load and prevents the deformation of the push rod.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a shuttle-shaped self-locking control valve according to a first embodiment of the present invention;

2 is a schematic structural view of a shuttle-shaped self-locking control valve according to a second embodiment of the present invention;

3 is a schematic structural view of a shuttle-shaped self-locking control valve according to a third embodiment of the basic embodiment of the present invention;

4 is a schematic structural view of a shuttle-shaped self-locking control valve according to Embodiment 1 of the basic scheme 2 in the embodiment of the present invention;

5 is a schematic structural view of a shuttle-shaped self-locking control valve according to Embodiment 2 of the basic scheme 2 in the embodiment of the present invention;

6 is a schematic structural view of a shuttle-shaped self-locking control valve according to Embodiment 3 of the basic scheme 2 in the embodiment of the present invention;

7 is a schematic structural view of a shuttle-shaped self-locking control valve according to Embodiment 1 of the basic scheme 3 of the embodiment of the present invention;

8 is a schematic structural view of a shuttle-shaped self-locking control valve according to Embodiment 1 of the basic scheme of the embodiment of the present invention;

9 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 1 of the basic scheme 5 in the embodiment of the present invention;

10 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 2 of the basic scheme 5 in the embodiment of the present invention;

11 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 3 of the basic scheme 5 in the embodiment of the present invention;

12 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 4 of the basic scheme 5 in the embodiment of the present invention;

13 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 5 of the fifth embodiment of the present invention;

14 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 6 of the basic scheme 5 in the embodiment of the present invention;

15 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 7 of the basic scheme 5 in the embodiment of the present invention;

16 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 8 of the basic scheme 5 in the embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a shuttle-shaped self-locking jet control device according to Embodiment 9 of the fifth embodiment of the present invention.

detailed description

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the shuttle self-locking control valve in the first embodiment of the basic scheme 1 of the present invention The valve body mechanism 1 includes a ball 201, which belongs to a tubular manual cut-off control valve. The valve body mechanism 1 includes a main passage 101, a spool seat 102, a pusher switch 103, and a spool seal seat 104. The main channel 101 includes a first interface 101a and a second interface 101b that communicate with the outside. The pusher switch 103 includes a push rod 103a, a sealing device 103b, and a control device 103c. The spool seal seat 104 includes a pusher cavity 104a that is mounted from the outside of the spool seal seat 104 into the pusher cavity 104a.

The spool seal seat 104 is threadedly engaged with the push rod 103a, and the push rod 103a is driven to move back and forth along the push rod chamber 104a by manually rotating the control device 103c provided at the outer end of the push rod 103a. The sealing device 103b includes a seal ring disposed between the push rod 103a and the valve plug seal seat 104 to prevent fluid from leaking between the push rod 103a and the valve plug seal seat 104.

The spool seal seat 104, the pusher switch 103, the spool seat 102, and the main passage 101 form a spool chamber 106. The spool chamber 106 communicates with the push rod chamber 104a. The spool seat 102 is provided with fluid for entering the spool chamber 106. The spool seat passage 102a. The ball 201 is fitted in a spool chamber 106 between the spool seal seat 104 and the spool seat 102. The spool seat passage 102a is in communication with the first port 101a, and the spool chamber 106 is in communication with the second port 101b. The stroke of movement of the ball 201 within the spool cavity 106 is less than the length of the push rod 103a; the diameter of the ball 201 is greater than the diameter of the push rod cavity 104a; the diameter of the ball 201 is greater than the diameter of the spool seat passage 102a on the spool seat 102.

The spool seal seat 104 and the spool seat 102 form a two-way shuttle select seal seat. An end cover 105 is disposed on the outer side of the valve plug sealing seat 104. When the push rod 103a is outwardly moved out to the maximum stroke, the end cap 105 restricts the push rod 103a from moving outward, and the ball 201 is pressed against the valve core sealing seat by the fluid. At 104, the ball 201 forms a self-locking seal with the valve plug seal 104 and cuts off the force between the push rod 103a and the ball 201 to reduce the deformation of the push rod 103a and prevent fluid from leaking from the push rod 103a. When the pusher 103a is moved inward by the control device 103c, the ball 201 can be pressed against the spool seat passage 102a to close the spool seat passage 102a.

Since the push rod 103a is fitted into the push rod chamber 104a from the outside of the valve plug sealing seat 104, when the push rod 103a is removed or the sealing device 103b is replaced, the end cover 105 needs to be removed first, and then the push rod 103a or the sealing device 103b is removed. At the same time, since the ball 201 and the valve plug sealing seat 104 form a seal, fluid can be effectively prevented from leaking from the push rod chamber 104a to disassemble the push rod 103a or replace the sealing device 103b without affecting normal operation.

FIG. 2 shows a shuttle-shaped self-locking control valve in the second embodiment of the basic scheme, belonging to a plate type hydraulic control globe valve. The shuttle self-locking control valve in this embodiment operates in the same manner as in the first embodiment, and the structure is slightly different. Further, as shown in Fig. 2, the push rod 103a is controlled by an external hydraulic oil control, and a spring 103e is further provided between the valve plug seal seat 104 and the push rod 103a in the moving direction of the push rod 103a. The spring 103e helps the push rod 103a to be outwardly reset after the external hydraulic pressure is canceled, preventing the push rod 103a from being pressed against the ball 201.

FIG. 3 shows a shuttle-shaped self-locking control valve in the third embodiment of the basic scheme, which belongs to a tubular hydraulic control type globe valve.

The operation principle of the shuttle-shaped self-locking control valve in this embodiment is the same as that of the first embodiment, and the structure is slightly different. As shown in FIG. 3, the first interface 101a is disposed on the spool seat 102, and the second interface 101b is disposed on the spool sealing seat 104. The control device 103c employs an outer nut type operating handle, and the control device 103c is threadedly engaged with the valve plug sealing seat 104, and the push rod 103a is controlled to move back and forth along the push rod chamber 104a by the rotation control device 103c. In this embodiment, the valve core seat 102 has a tubular structure, and the valve core sealing seat 104 is screwed onto the valve core seat 102 for easy assembly and facilitates the hardening process of the valve core seat 102.

FIG. 4 shows a shuttle-shaped self-locking control valve in the first embodiment of the basic scheme 2, which belongs to a right angle type cut-off valve and can be applied to a household water pipe, a hydraulic device, a pneumatic device and the like.

The shuttle-shaped self-locking control valve in this embodiment includes a valve body mechanism 1 and a valve body 2. The valve body mechanism 1 includes a main passage 101, a spool seat 102, a pusher switch 103, and a spool seal seat 104, and the spool 2 is spherical. The main channel 101 includes a first interface 101a and a second interface 101b that communicate with the outside.

The pusher switch 103 includes a push rod 103a, a sealing device 103b, and a control device 103c. The spool seal seat 104 includes a pusher cavity 104a that is mounted from the outside of the spool seal seat 104 into the pusher cavity 104a.

The control device 103c is disposed at the outer end of the push rod 103a and is threadedly engaged with the valve plug sealing seat 104, and the push rod 103a is driven to move back and forth along the push rod chamber 104a by the manual rotation control device 103c. The sealing device 103b includes a seal ring disposed between the push rod 103a and the valve plug seal seat 104 to prevent fluid from leaking between the push rod 103a and the valve plug seal seat 104.

The spool seal seat 104, the pusher switch 103, the spool seat 102, and the main passage 101 form a spool chamber 106. The spool chamber 106 communicates with the push rod chamber 104a. The spool seat 102 is provided with fluid for entering the spool chamber 106. The spool seat passage 102a. The ball 201 is fitted in a spool chamber 106 between the spool seal seat 104 and the spool seat 102. The spool seat passage 102a is in communication with the first port 101a, and the spool chamber 106 is in communication with the second port 101b.

The spool sealing seat 104 is provided with a first guiding cavity 104b, and the spool 2 is fitted in the first guiding cavity 104b so as to be movable back and forth along the moving direction of the push rod 103a. The spherical spool 2 is directly larger than the diameter of the push rod chamber 104a, and the diameter of the spool 2 is larger than the diameter of the spool seat passage 102a.

The spool seal seat 104 and the spool seat block 102 form a two-way shuttle-shaped selective seal seat, and the ball valve core 2 is pressed against the valve plug seal seat 104 by the fluid, and the spool 2 and the valve plug seal seat 104 form a self-locking seal and The force between the push rod 103a and the spool 2 is cut to reduce the deformation of the push rod 103a, preventing fluid from leaking from the push rod 103a.

When the pusher 103a is moved inward by the control device 103c, the ball 201 can be pressed against the spool seat passage 102a to close the spool seat passage 102a. A main passage 101 communicating with the second interface 101b is also provided on the spool sealing seat 104 to increase the flow capacity between the first interface 101a and the second interface 101b.

Since the push rod 103a is fitted into the push rod chamber 104a from the outside of the valve plug sealing seat 104, when the push rod 103a is removed or the sealing device 103b is replaced, the ball 201 and the valve plug sealing seat 104 form a seal, and the push rod 103a is removed. After the sealing device 103b, the fluid can be effectively prevented from leaking from the pusher cavity 104a to disassemble the pusher 103a or replace the sealing device 103b without affecting normal operation.

FIG. 5 shows a shuttle self-locking control valve in the second embodiment of the basic scheme 2, which belongs to a cartridge type safety valve.

The structure and working principle of the shuttle-shaped self-locking control valve in this embodiment are basically the same as those in the first embodiment of the basic scheme 2, and further includes an operating handle 103d disposed at the outer end of the push rod 103a and a valve disposed at one end of the operating handle 103d and the valve A spring 103e between the body mechanisms 1. The middle portion of the operating handle 103d is rotatably disposed on the valve body mechanism 1, and the push rod 103a is moved outward by pressing the operating handle 103d. When the operating handle 103d is not subjected to force, the spring 103e is reset to move the push rod 103a inward.

Removing the operating handle 103d can take the push rod 103a out of the valve plug seat 104, and the ball 201 and the valve plug sealing seat 104 will form a seal, so that the shuttle-shaped self-locking control valve is in a low pressure relief state. At the same time, the shuttle-shaped self-locking control valve can also be designed to be remotely controlled, and when applied to a high temperature environment, it can effectively avoid injury to the operator.

Fig. 6 shows a shuttle-shaped self-locking control valve in the third embodiment of the basic scheme 2, which belongs to a flange type globe valve.

The structure and working principle of the shuttle-shaped self-locking control valve in this embodiment are basically the same as those in the first embodiment of the second embodiment, except that the valve core 2 is a combined valve core, and is used for the valve core seat 102. A cone 201 that cooperates to achieve sealing of the spool seat passage 102a, and a ball 201 for sealing with the pusher cavity 104a on the spool seal seat 104 are engaged. The poppet 202 is provided with a guiding rod 202a that cooperates with the first guiding cavity 104b, so that the poppet 202 can move back and forth within the first guiding cavity 104b.

The push rod 103a is electrically controlled, and the valve core seat 102 is disposed in the valve body mechanism 1 in a mosaic structure. A main passage 101 communicating with the main passage 101 on the valve body mechanism 1 is also provided on the spool sealing seat 104 to increase the flow capacity.

Fig. 7 shows a shuttle-shaped self-locking control valve in the first embodiment of the basic scheme 3, which belongs to a flange type globe valve.

The shuttle-shaped self-locking control valve in this embodiment is basically the same as the principle and structure of the first embodiment of the second embodiment, except that the inner side of the valve core sealing seat 104 is provided with a guiding end 104c corresponding to the valve core 2, and the guiding end 104c is an annular boss disposed around the outer edge of the inner end surface of the push rod cavity 104a. The valve core 2 is a planar valve core 203 provided with a guide hole 203a, and the guide hole 203a is disposed on the periphery of the guide end 104c.

The stroke of the spool 2 in the spool chamber 106 is smaller than the length of the push rod 103a to prevent the push rod 103a from being caught in the guide hole 203a. The spool seal seat 104 is provided with a main passage 101 communicating with the main passage 101 on the valve body mechanism 1 to increase the flow capacity.

FIG. 8 shows a shuttle-shaped self-locking control valve in the first embodiment of the basic scheme 4, which belongs to a right angle cut-off valve.

The shuttle-shaped self-locking control valve in this embodiment has the same principle as the third embodiment of the basic solution. The structural difference is that the valve core 2 is a planar valve core 203, and is provided with a guide rod 202a, and the main passage 101 is provided. The guide rail 101a, the guide rod 202a is movably engaged with the guide rail 101d. The stroke of movement of the spool 2 within the spool chamber 106 is less than the length of the push rod 103a to prevent the push rod 103a from getting caught in the spool chamber 106.

FIG. 9 shows a shuttle-shaped self-locking jet control device in the first embodiment of the fifth embodiment, which has the function of a reversing valve and is a superimposed valve structure. The shuttle-shaped self-locking jet control device includes a valve body mechanism 1 and a valve body 2. The valve body mechanism 1 includes a main passage 101, a spool seat 102, and a spool sealing seat 104.

The main channel 101 includes a first interface 101a, a second interface 101b, a third interface 101c, a first low-pressure jet channel 108a, and a second low-pressure jet channel 108b that are in communication with each other.

The spool seat 102, the spool seal seat 104, and the second port 101b form a spool cavity 106 that communicates with the second port 101b. The spool 2 is a spool 204 which is fitted in a spool chamber 106 between the spool seat 102 and the plug seal seat 104. The spool 2 is provided with a corresponding fit with the spool seat 102 and the plug seal seat 104. The first spool anti-collision buffer 205.

The spool seat 102 is provided with a spool seat passage 102a through which a fluid flows, a second spool back buffer 102b corresponding to the first spool crash buffer 205, and a second guide chamber for moving the spool 2 back and forth 102d, the spool seat passage 102a communicates with the second interface 101b and the second guiding cavity 102d, and communicates with the first interface 101a through the first low pressure jet channel 108a. The first low-pressure jet channel 108a, the first interface 101a, and the second guiding cavity 102d are connected to form a three-way structure 108c. When the two first interfaces 101a are disposed at the same position, the first low-pressure jet channels 108a and the second can be The guide cavity 102d forms a four-way structure 108d.

The valve plug sealing seat 104 is provided with a seal seat passage 104e for fluid circulation, a third spool anti-collision buffer table 104d corresponding to the first spool anti-collision buffer table 205, and a first guide chamber for moving the spool 2 back and forth. 104b, the seal seat passage 104e communicates with the second interface 101b, the first guide chamber 104b, and communicates with the third interface 101c through the second low pressure jet passage 108b. The second low-pressure jet channel 108b, the third interface 101c, and the first guiding cavity 104b are connected to form a three-way structure 108c. When two third interfaces 101c are disposed at the same position, the second low-pressure jet channel 108b and the first The guide cavity 104b forms a four-way structure 108d.

The two ends of the spool 2 are respectively clearance-fitted with the second guiding cavity 102d and the first guiding cavity 104b to move the spool 2 back and forth between the spool seat 102 and the plug sealing seat 104. The first spool anti-collision buffer 205 forms a damped anti-collision structure with the second spool anti-collision buffer 102b and the third spool anti-collision buffer 104d during the back-and-forth movement.

The first low-pressure jet channel 108a and the second low-pressure jet channel 108b are respectively provided with a jet switch 4, and the jet switch 4 is an electric control switch. In use, the first interface 101a and the third interface 101c respectively communicate with an access working cavity of an actuator such as a working cylinder or a motor, and the second interface 101b communicates with an outlet of a pressure fluid source such as a pump.

The valve plug sealing seat 104 and the valve core seat 102 constitute a two-way shuttle-shaped selective sealing seat, and the valve core 2 is pressed against the valve core sealing seat 104 or the valve core seat 102 by a fluid to form a self-locking seal, and the two jet switches 4 respectively control the first The low pressure jet passage 108a and the second low pressure jet passage 108b are opened and closed.

As shown in FIG. 9, the jet switch 4 on the first low pressure jet passage 108a is in a closed state, and the second port 101b is in communication with the first port 101a via the spool seat passage 102a, the first interface 101a and the actuators connected thereto The working chamber is in a high pressure state; the jet switch 4 on the second low pressure jet passage 108b is in an open state, and the first spool anti-collision buffer 205 is pressed against the third spool anti-collision buffer 104d of the spool sealing seat 104, the valve The core 2 closes the passage of the valve plug seat 104 to form a self-locking seal, and the third port 101c and the actuator working chamber communicating therewith are in a low pressure return state.

When the jet switch 4 on the first low-pressure jet channel 108a is turned on, the fluid flowing in from the second port 101b generates a jet in the spool seat channel 102a; when the jet switch 4 on the second low-pressure jet channel 108b is closed, the third interface The working chamber of the 101c-connected actuator is momentarily raised under the inertia of the actuator movement. The spool 2 is moved by the fluid force to the spool seat 102, and the first spool anti-collision buffer 205 is pressed against the second spool anti-collision buffer 102b of the spool seat 102, and the spool 2 will be the spool seat passage. The 102a is closed to form a self-locking seal, and the third interface 101c and the second interface 101b are in a high pressure state through the seal seat passage 104e, and the first interface 101a is in a low pressure return state, and the commutation is realized. The valve core 2 is pressed against the valve core seat 102 to form a self-locking seal, which reduces heat generation during operation and improves work efficiency.

When the first low-pressure jet channel 108a and the second low-pressure jet channel 108b are both in the low-voltage on state, the second port 101b is in a freely connected state with the first low-pressure jet channel 108a and the second low-pressure jet channel 108b. . When the jet switch 4 of one of the first low pressure jet passage 108a or the second low pressure jet passage 108b is closed, the spool 2 will automatically close the second low pressure jet passage 108b corresponding to the other jet switch 4 or the second interface 101b or The unloading state of the first low pressure jet passage 108a begins to enter operation.

In the reversing process, the jet switches 4 are respectively replaced in sequence, which can effectively prevent the fluid from leaking from the valve plug housing 104; at the same time, the two jet switches 4 can be separately repaired. During the reversing process, the spool 2 is driven by the fluid, and the inertia is small, effectively reducing vibration and noise, and prolonging the service life of the spool 2.

The shuttle-shaped self-locking jet flow control device in this embodiment can be integrated with other fuel tanks, oil pumps, motors, and the like. In other embodiments, the two jet switches 4 can be eliminated for use as a shuttle valve. It is also possible to connect the other hydraulic switching elements to the first interface 101a and the third interface 101c after canceling the two jet switches 4.

FIG. 10 shows a shuttle-shaped self-locking jet control device of the second embodiment of the basic scheme 5, which has the function of a reversing valve and is a superimposed valve structure. The principle is basically the same as that of the first embodiment of the basic scheme 5.

The embodiment is different from the first embodiment of the basic scheme 5 in that a guide end 104c is respectively disposed on opposite sides of the valve core seat 102 and the valve core sealing seat 104, and two ends of the valve core 2 are respectively provided with two guides. The end 104c cooperates with the guide hole 203a and is movable back and forth between the spool seat 102 and the plug seal seat 104 along the guide end 104c. A control spring 107 is respectively disposed on two sides of the first spool anti-collision buffering table 205, and the two control springs 107 respectively abut against the valve core 2 and the valve core sealing seat 104, and can have limited shock absorption during the movement of the valve core 2 back and forth. The reset position can also control the movement position of the spool 2 by the ratio of the working pressure of the fluid to the spring force of the control spring 107.

Figure 11 is a perspective view of a shuttle-type self-locking jet control device of the third embodiment of the basic scheme 5, which belongs to a one-way stop valve.

The shuttle-shaped self-locking jet control device includes a valve body mechanism 1 and a tapered valve body 2. The valve body mechanism 1 includes a valve core seat 102, a valve plug seal seat 104, and a jet switch 4.

The spool seat 102 is provided with a first interface 101a and a spool seat passage 102a communicating with the first interface 101a.

The spool sealing seat 104 is provided with a second interface 101b, a first guiding cavity 104b, a pusher cavity 104a, and a low pressure jet channel 108. The spool sealing seat 104, the spool seat 102 and the second port 101b form a spool cavity 106 in which the spool 2 is mounted, and the spool cavity 106 communicates with the pusher cavity 104a, the second interface 101b, and the spool seat passage 102a, respectively. The jet passage 108 communicates with the push rod chamber 104a.

The spool 2 cooperates with the first pilot chamber 104b and moves back and forth within the spool chamber 106 to close the passage between the spool chamber 106 and the push rod chamber 104a or to close the spool seat passage 102a.

The valve core 2 is provided with a first spool anti-collision buffering station 205, and the valve core sealing seat 104 is provided with a third spool anti-collision buffering station 104d. When the spool 2 is near the side of the valve plug sealing seat 104, the first valve The core anti-collision buffer 205 is matched with the third spool anti-collision buffer 104d.

The jet switch 4 is a manual control switch 401 mounted on the low pressure jet passage 108, and includes a push rod 103a and a sealing device 103b. The push rod 103a is movably mounted in the push rod chamber 104a to open or close the spool chamber 106 and The passage between the push rod chambers 104a causes the low pressure jet passage 108 and the spool chamber 106 to communicate or isolate.

The second interface 101b is connected to the pressure fluid source. When the jet switch 4 is closed, the push rod 103a cooperates with the push rod chamber 104a, the passage between the low pressure jet passage 108 and the spool chamber 106 is closed, and the push rod chamber 104a is in a high pressure state. The spool 2 is pressed against the spool seat 102 under the force of the fluid to cut off the communication state between the second interface 101b and the first interface 101a;

When the jet switch 4 is turned on, the push rod 103a is separated from the push rod chamber 104a, the passage between the low pressure jet passage 108 and the spool chamber 106 is opened, the push rod chamber 104a is in a low pressure state, and the spool 2 is pressed by the action of the fluid. Immediately on the valve plug seat 104, the communication between the second port 101b and the low pressure jet passage 108 is cut off, and the first port 101a and the second port 101b are simultaneously turned on.

When the jet switch 4 is reclosed, the sealing force of the valve plug sealing seat 104 and the valve core 2 is strict, the adsorption force between the valve core sealing seat 104 and the valve core 2 is large, and the fluid force of the second interface 101b cannot be pushed. The spool 2, the push rod 103a pushes the first spool anti-collision buffer 205 before the communication between the second port 101b and the low-pressure jet channel 108 is completely cut, and generates between the plug seal 104 and the spool 2 With a slight leakage gap, the fluid force of the second interface 101b will quickly push the spool 2 against the spool seat 102, while the push rod 103a will also disconnect the second interface 101b from the low pressure jet passage 108.

In this embodiment, the push rod chamber 104a can adopt a small diameter to control the cutoff and opening of the high flow rate and high pressure circuit with a small control force.

In this embodiment, the jet switch 4 can be remotely controlled by means of hydraulic control or pneumatic or machine control.

This embodiment can be combined with other embodiments of the basic scheme 5 to form a complex logic system, and can also be used as the fluidic switch 4 in the other embodiment of the basic scheme 5.

In this embodiment, the spool 2 is provided with a jet groove 202b to increase the thrust of the jet against the spool 2.

In addition, the shuttle-shaped self-locking jet control device in this embodiment can be used as a hydraulic lock. When the jet switch 4 is closed, the second interface 101b is connected to the inlet chamber or the outlet port of the working element such as the oil cylinder, and the first interface 101a is connected back. The fuel tank, the high pressure oil of the second port 101b presses the valve core 2 against the valve core seat 102; when the jet switch 4 is opened, the second port 101b communicates with the first port 101a to achieve unloading.

When the push rod 103a is disassembled, the spool 2 is pressed against the valve plug seat 104 under the force of the fluid, and the communication between the spool chamber 106 and the low pressure jet passage 108 is cut off, and no fluid is generated from the spool chamber 106. The phenomenon of leakage.

Figure 12 relates to a shuttle-shaped self-locking jet control device of the fourth embodiment of the basic scheme 5, which has the function of a reversing valve, and two two-position three-shaped shuttle-shaped self-locking jet control devices are arranged side by side, including One-two three-way shuttle-shaped self-locking jet flow control device, second second three-way shuttle-shaped self-locking jet flow control device, wherein the first two-position three-type shuttle-shaped self-locking jet flow control device spool The seat channel 102a and the first interface 101a communicate with the second interface 101b' of the second binary three-way shuttle-shaped self-locking jet control device to form a three-way structure 108c. In this embodiment, the first interface 101a of the first two-position three-way shuttle-shaped self-locking jet control device is an interface of a working element such as a cylinder, and the second two-position three-shaped shuttle-shaped self-locking jet control device An interface 101a' is an interface to the unloading circuit.

The first two-position three-way shuttle-shaped self-locking jet control device controls the opening and closing between the second interface 101b and the working element of the cylinder, and the second two-position shuttle-type self-locking jet control device controls the first Unloading between an interface 101a' and a working element such as a cylinder.

The working principle of the two-position three-way shuttle-shaped self-locking jet control device is the same as that of the third embodiment of the basic scheme 5. In this embodiment, the spool 2 is provided with a jet flow groove to increase the thrust of the jet to the spool 2.

FIG. 13 is a shuttle-shaped self-locking jet control device of Embodiment 5 of the basic scheme 5, relating to a tubular-connected reversing valve, the working principle of the shuttle-shaped self-locking jet control device of the present embodiment and The working principle of the shuttle-shaped self-locking jet flow control device in the first embodiment of FIG. 9 is basically the same, and the structure is slightly different. The valve body is provided with a guide track 101d through the guide rod 202a and the guide on the valve core 2. The cooperation of the track 101d controls the direction of movement of the spool 2.

In this embodiment, the first interface 101a and the third interface 101c are interfaces of working pipes of working elements such as oil cylinders.

14 is a shuttle-shaped self-locking jet control device of the sixth embodiment of the basic scheme, which belongs to a plate-connected reversing valve, and the working principle of the shuttle-shaped self-locking jet control device of the present embodiment is basically the same as that in FIG. The working principle of the shuttle-shaped self-locking jet flow control device in the first embodiment is basically the same, and the structure is slightly different, and the valve core 2 used is spherical.

15 is a shuttle-shaped self-locking jet control device of the seventh embodiment of the basic scheme 5, which belongs to a remotely controlled two-position three-way one-way stop valve, and the work of the shuttle-shaped self-locking jet control device of the present embodiment The principle is basically the same as that of the shuttle-shaped self-locking jet control device in the first embodiment of the basic scheme 5 in FIG.

The first interface 101a is an outlet, and the second interface 101b is an inlet connected to the pressure fluid source 5. The three-way includes a first interface 101a, a second interface 101b, and a low-pressure jet channel 108. The two bits include the first interface 101a and the second interface. The on or off state of the interface 101b.

In operation, regardless of whether the first interface 101a and the second interface 101b are turned on or off, the second interface 101b and the low pressure jet channel 108 are both in a closed state, and a closed state is self-locking and sealing by the valve core 2 and the valve plug sealing seat 104. A closed state is closed by the jet switch 4, and a small amount of working fluid leaks from the low pressure jet passage 108 through the return passage 601 into the storage tank 6 during switching between the two states.

In this embodiment, the structure of the valve core seat 102 is relatively simple, easy to assemble, and facilitates the hardening process of the valve core seat 102.

Figure 16 is a shuttle-type self-locking jet control device of the fifth embodiment of the basic scheme, which belongs to a multi-point remote integrated control module, which is composed of four two-position three-way reversing valves and four jet switches. 4 composition.

The working principle of each of the two-position three-way type reversing valve in this embodiment is basically the same as that of the shuttle-shaped self-locking jet control device of the third embodiment of the basic scheme shown in FIG. 11, except that the valve body 2 is spherical. The four jet switches 4 are respectively composed of a manual one-way stop valve 401, a hydraulic one-way stop valve 402, an electronically controlled one-way stop valve 404, and a mechanical control one-way stop valve 405, which are respectively controlled by four groups of one-way stop valves, respectively Control a two-position three-way directional control valve.

In this embodiment, the valve plug sealing seat 104 includes a main passage 101 and a second interface 101b. The valve core seat 102 is assembled on the valve core sealing seat 104. The valve core seat 102 has a tubular structure and has a simple structure and is easy to assemble. Easy to harden. The main passage 101 communicates the spool chambers 106 of the four two-position three-way reversing valves.

In this embodiment, the two-position two-way one-way shut-off valves are separately controlled by the two-position two-way one-way shut-off valves of different control modes, and the pressure power source is supplied to each working element.

Figure 17 is a shuttle-type self-locking jet control device of the fifth embodiment of the basic scheme, which belongs to a pressure power source, and includes a pump 501, a storage tank 6 and a valve body mechanism 1. The valve body mechanism 1 is disposed at On the storage box 6. The valve body mechanism 1 includes five spool chambers 106, five spools 204, and five two-position three-way self-locking jet control devices 11; the working principle of each spool 204 and the embodiment shown in FIG. Basically; in this embodiment, the two-position three-way self-locking jet control device 11 is the third embodiment in the basic scheme five, and each two-position three-way self-locking jet control device 11 controls the pressure fluid to the five spool chambers 106, respectively. The supply and exit. In this embodiment, the pump, the storage box 6, and the valve body mechanism 1 are integrated, so that the structure is compact, small in size, and light in weight.

It will be understood that each of the above technical features may be used in any combination without limitation.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A shuttle-shaped self-locking control valve includes a valve body mechanism (1) and a ball (201), and the valve body mechanism (1) includes a main passage (101), a spool seat (102), and a push core switch (103). It is characterized in that

The valve body mechanism (1) further includes a valve plug seal seat (104), the pusher core switch (103) includes a push rod (103a), and the valve plug seal seat (104) is provided with the push rod (103a) installed pusher cavity (104a), the pusher (103a) is assembled from the outside of the valve plug seat (104) in the pusher cavity (104a);

The spool sealing seat (104), the pusher switch (103), the spool seat (102), and the main passage (101) constitute a spool cavity (106);

The spool cavity (106) is in communication with the pusher cavity (104a);

The ball (201) is assembled in the spool cavity (106) between the spool sealing seat (104) and the spool seat (102);

The spool seat (102) is provided with a spool seat passage (102a) for fluid to enter the spool chamber (106);

a movement stroke of the ball (201) in the spool cavity (106) is smaller than a length of the push rod (103a); a diameter of the ball (201) is larger than a diameter of the push rod cavity (104a); The diameter of the ball (2) is larger than the diameter of the spool seat passage (102a) on the spool seat (102);

The spool sealing seat (104) and the valve core seat (102) constitute a two-way shuttle-shaped selective sealing seat, and the ball (201) is pressed against the valve core sealing seat (104) by fluid pushing, The ball (201) forms a self-locking seal with the valve plug sealing seat (104) and cuts off the force between the push rod (103a) and the ball (201) to reduce the deformation of the push rod (103a), preventing fluid from Leak at the push rod (103a).
The utility model relates to a shuttle self-locking control valve, comprising a valve body mechanism (1) and a valve core (2). The valve body mechanism (1) comprises a main channel (101), a valve core seat (102) and a push core switch (103). , which is characterized by

The valve body mechanism (1) further includes a valve plug seal seat (104), the pusher core switch (103) includes a push rod (103a), and the valve plug seal seat (104) is provided with the push rod (103a) installed pusher cavity (104a), the pusher (103a) is assembled from the outside of the valve plug seat (104) in the pusher cavity (104a);

The spool sealing seat (104), the pusher switch (103), the spool seat (102), and the main passage (101) constitute a spool cavity (106);

The spool cavity (106) is in communication with the pusher cavity (104a);

The spool (2) is assembled in the spool cavity (106) between the spool sealing seat (104) and the spool seat (102);

The spool seat (102) is provided with a spool seat passage (102a) for fluid to enter the spool chamber (106);

The spool sealing seat (104) has a first guiding cavity (104b), the valve core (2) is fitted in the first guiding cavity (104b); the maximum diameter of the valve core (2) is larger than the a diameter of the pusher cavity (104a); a maximum diameter of the spool (2) is greater than a diameter of the spool seat passage (102a) on the spool seat (102);

The spool sealing seat (104) and the valve core seat (102) constitute a two-way shuttle-shaped selective sealing seat, and the valve core (2) is pressed under the fluid pressure along the first guiding cavity (104b) On the spool sealing seat (104), the valve core (2) forms a self-locking seal with the valve plug sealing seat (104) and cuts off the action between the push rod (103a) and the spool (2) The force reduces the deformation of the push rod (103a) and prevents fluid from leaking from the push rod (103a).
The utility model relates to a shuttle self-locking control valve, comprising a valve body mechanism (1) and a valve core (2). The valve body mechanism (1) comprises a main channel (101), a valve core seat (102) and a push core switch (103). , which is characterized by

The valve body mechanism (1) includes a valve plug seal seat (104), the pusher core switch (103) includes a push rod (103a), and the pusher seal seat (104) is provided with the push rod ( 103a) installed pusher cavity (104a), the pusher (103a) is assembled from the outside of the valve plug seat (104) in the pusher cavity (104a);

The spool sealing seat (104), the pusher switch (103), the spool seat (102), and the main passage (101) constitute a spool cavity (106);

The spool cavity (106) is in communication with the pusher cavity (104a);

The spool (2) is assembled in the spool cavity (106) between the spool sealing seat (104) and the spool seat (102);

The spool seat (102) is provided with a spool seat passage (102a) for fluid to enter the spool chamber (106);

The valve core (2) has a guiding hole (203a), the valve core sealing seat (104) has a guiding end (104c), and the guiding hole (203a) is sleeved at the guiding end (104c); The movement stroke of the spool (2) in the spool chamber (106) is smaller than the length of the push rod (103a); the maximum diameter of the spool (2) is larger than the diameter of the push rod chamber (104a); The maximum diameter of the core (2) is greater than the diameter of the spool seat passage (102a) on the spool seat (102);

The spool sealing seat (104) and the valve core seat (102) constitute a two-way shuttle-shaped selective sealing seat, and the valve core (2) is pressed against the valve along the guiding end (104c) by fluid pushing On the core sealing seat (104), the valve core (2) forms a self-locking seal with the valve plug sealing seat (104) and cuts the force between the push rod (103a) and the valve core (2) The deformation of the push rod (103a) prevents fluid from leaking from the push rod (103a).
The utility model relates to a shuttle self-locking control valve, comprising a valve body mechanism (1) and a valve core (2). The valve body mechanism (1) comprises a main channel (101), a valve core seat (102) and a push core switch (103). , which is characterized by

The valve body mechanism (1) includes a valve plug seal seat (104), the pusher core switch (103) includes a push rod (103a), and the pusher seal seat (104) is provided with the push rod ( 103a) installed pusher cavity (104a), the pusher (103a) is assembled from the outside of the valve plug seat (104) in the pusher cavity (104a);

The spool sealing seat (104), the pusher switch (103), the spool seat (102), and the main passage (101) constitute a spool cavity (106);

The spool cavity (106) is in communication with the pusher cavity (104a);

The spool (2) is assembled in the spool cavity (106) between the spool sealing seat (104) and the spool seat (102);

The spool seat (102) is provided with a spool seat passage (102a) for fluid to enter the spool chamber (106);

The main passage (101) has a guide rail (101d), and the valve core (2) is fitted on the guide rail (101d); the movement stroke of the spool (2) in the spool cavity (106) is smaller than a length of the push rod (103a); a maximum diameter of the spool (2) is larger than a diameter of the push rod chamber (104a); a maximum diameter of the spool (2) is larger than the spool seat (102) The diameter of the spool seat passage (102a);

The spool sealing seat (104) and the valve core seat (102) constitute a two-way shuttle-shaped selective sealing seat, and the valve core (2) is pressed against the valve core by a fluid pushing along a guiding track (101d) On the seat (104), the spool (2) forms a self-locking seal with the plug seal seat (104) to prevent fluid from leaking from the push rod (103a).
A shuttle-shaped self-locking control valve according to any one of claims 1 to 4, characterized in that the valve plug sealing seat (104) is provided with a main passage (101).
A shuttle-shaped self-locking jet control device comprising a valve body mechanism (1), one or more valve cores (2), the valve body mechanism (1) comprising a main passage (101), one or more spool seats ( 102), characterized in that

The valve body mechanism (1) includes one or more valve plug seals (104) having a seal seat passage (104e) for fluid communication, the spool seal seat (104) The spool seat (102), the main passage (101) constitutes one or more spool chambers (106), and the spool (2) is fitted to the spool seal seat (104) and the valve In the spool chamber (106) between the core seats (102), the spool seat (102) has a spool seat passage (102a) for fluid circulation;

The valve body mechanism (1) includes one or more low pressure jet passages (108), the low pressure jet passages (108) being comprised of a seal seat passage (104e) of the spool seal seat (104); or a low pressure jet passage (108) consisting of a spool seat passage (102a) on the spool seat (102); or consisting of one or more of the spool seat passages (102a) on the spool seat (102) a portion of the low pressure jet passage (108) and the other portion of the low pressure jet passage (108) formed by the seal seat passage (104e) of the spool seal seat (104);

The shuttle-shaped self-locking jet control device further includes one or more jet switches (4), the jet switch (4) being mounted on the low-pressure jet channel (108);

The maximum diameter of the spool (2) is larger than the diameter of the seal seat passage (104e); the maximum diameter of the spool (2) is larger than the spool seat passage (102a) on the spool seat (102) diameter of;

The spool sealing seat (104) and the spool seat (102) form a two-way shuttle-shaped selective sealing seat, and the jet switch (4) controls opening and closing of the low-pressure jet passage (108), the valve The core (2) is pressed against the valve plug seat (104) or the valve core seat (102) under fluid pressure to form a self-locking seal to prevent fluid from the valve plug seal seat (104) or the valve The core seat (102) leaks.
A shuttle-shaped self-locking jet control device according to claim 6, wherein said seal seat passage (104e) includes a push rod chamber (104a), and said jet switch 4 includes a push rod (103a). The push rod (103a) is fitted to the push rod chamber (104a).
A shuttle-shaped self-locking jet control device according to claim 6, wherein said valve core (2) has a guide rod (202a) or a guide hole (203a), said guide rod (202a) or guide A hole (203a) is slidably engaged with the valve body mechanism (1) to control the movement of the spool (2).
A shuttle-shaped self-locking jet control device according to claim 6, wherein a three-way structure or a three-way structure is included between the jet switch (4) and the spool chamber (106).
The shuttle-shaped self-locking jet control device according to claim 6, wherein the valve core (2) is provided with a first spool anti-collision buffering station (205);

The first spool anti-collision buffer (205) cooperates with the valve body mechanism (1) to move back and forth in the spool (2) for buffering.
A shuttle-shaped self-locking jet control device according to claim 6, wherein at least one end of the opposite ends of the valve core (2) is provided with a control spring (107), the control spring (107) One end is assembled on the valve core (2), and the other end is matched with the valve body mechanism (1);

The control spring (107) buffers the spool (2) during movement back and forth, or controls the spool by a ratio of a working pressure of the fluid to a spring force of the control spring (107) The location of the move.
A shuttle-shaped self-locking jet control device according to any one of claims 6 to 10, wherein the shuttle-shaped self-locking jet control device has a storage tank (6) for storing fluid, the storage tank ( A return orifice (601) of 6) is in communication with the low pressure jet passage (108).
A shuttle-shaped self-locking jet control device according to any one of claims 6 to 10, wherein the spool chamber (106) is in communication with the source of pressurized fluid (5) that supplies fluid;

When the low pressure jet passage (108) is closed, the spool (2) is pressed against the spool sealing seat (104) or the spool seat under the fluid of the pressure fluid source (5). (102), shutting off the supply of the pressurized fluid source (5) to prevent leakage of fluid from the low pressure jet passage (108);

When the low pressure jet passage (108) is fully opened, the spool (2) is pressed against the valve plug seat (104) or the spool seat (102) under fluid pressure to be turned on. The supply of pressure fluid source (5) shuts off leakage from the low pressure jet passage (108).