CN217558366U - Plug-in type bidirectional lock - Google Patents

Abstract

The utility model discloses a two-way lock of cartridge formula, including valve body and case subassembly. The valve core assembly comprises a connector in threaded connection with the valve body, a return spring, a valve core, a valve cover, a small return spring and a piston. The utility model discloses a two-way lock of cartridge formula is symmetrical structure, sets up the PA mouth at the both sides equipartition of valve body, the PB mouth, the A2 mouth, the B2 mouth, the joint of two case sets up A1 mouth, the B1 mouth, high-pressure liquid gets into from the PA mouth, promote the left side case and make the PA mouth, the A1 mouth, the A2 mouth forms the route to make the middle section piston move right, promote the right side case, make the B1 mouth, the B2 mouth, the PB mouth forms the route, realize opening and being closed of hydraulic jack upper and lower chamber, adopt the utility model discloses a vertical two-way lock compact structure, sealing performance are reliable, stable performance is reliable, long service life, case subassembly and valve body inner wall adopt threaded connection, easy to assemble and change.

Description

Plug-in type bidirectional lock

Technical Field

The utility model belongs to relate to colliery hydraulic pressure field, concretely relates to two-way lock of cartridge formula.

Background

The two-way hydraulic lock is formed by two groups of hydraulic control one-way valves which are commonly used in a valve body. In coal mines, the hydraulic support is often used on a stand cylinder of a hydraulic support and is used for preventing the stand cylinder from sliding downwards by itself under the action of a top heavy object. The conventional plug-in type bidirectional lock suddenly reduces the oil pressure of an oil way in the reversing control process to cause sudden drop of an upright post oil cylinder, so that the danger is caused due to the fact that the oil return speed is too high due to load inertia.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a compact structure, sealing performance is reliable, the stable performance is reliable, long service life's two-way lock of cartridge formula.

In order to achieve the purpose, the plug-in type bidirectional lock comprises a valve body and a valve core assembly, wherein the valve core assembly comprises a connector, a return spring, an inner hexagonal flat end set screw, a valve core, a sealing ring, a supporting ring and a valve cover, and the connector is in threaded connection with the valve body. The utility model discloses a two-way lock of cartridge formula is middle symmetrical structure, as shown in the figure, set up the PA mouth at the upside of valve body, the PB mouth, keep away from the PA mouth in the relative one side of valve body, the A2 mouth is seted up to the direction of PB mouth, the B2 mouth, there is the joint for threaded connection with it in the valve body both sides, the one end of joint sets up to the A1 mouth, the B1 mouth, set up cascaded cavity and the A1 mouth with joint department in the joint, the B1 mouth communicates with each other, place the case on the first order of joint, restrict its displacement distance, reset spring is placed to the second order, and cooperate with case inner chamber, place the sealing ring in the conical surface seal department of case, make it form the conical surface seal pair with the case, the valve gap is placed to the sealing ring right-hand member, the valve gap is fixed with interior hexagonal flat-end holding screw between valve gap and the joint, place the support ring between sealing ring and valve gap, the valve gap closely laminates with valve body inner chamber boss, place the piston in valve body center department, make it can be nimble activity about.

The plug-in type bidirectional lock valve core assembly is in threaded connection with the valve body, so that the plug-in type bidirectional lock valve core assembly is convenient to disassemble and assemble, and the working efficiency is greatly improved.

A plurality of liquid guide holes are uniformly distributed on the valve cover, the joint and the valve core of the plug-in type bidirectional lock, so that working liquid can smoothly pass through the inner cavity of the valve core and the inner cavity of the valve sleeve.

The piston of the plug-in type bidirectional lock adopts a symmetrical double-sealing structure, so that the abrasion consumption between the inner wall of the valve body and the piston can be obviously reduced, and the service life is prolonged.

The plug-in type bidirectional lock performs proper selection and reasonable clearance fit on the materials of the spring seat, the piston and the valve core, and ensures that the safety valve moves flexibly and reliably.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

fig. 2 is a schematic view of a hydraulic principle of the embodiment of the present invention.

Labeled as: 10. a valve body; 11. a piston; 20. a valve core assembly; 21. a joint; 22. a return spring; 23. a set screw is fastened at the flat end of the inner hexagon; 24. a valve core; 25. a seal ring; 26. a support ring; 27. and a valve cover.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

A plug-in type bidirectional lock comprises a valve body 10 and a valve core assembly 20, wherein the valve core assembly 20 comprises a joint 21 in threaded connection with the valve body 10, a return spring 22, an inner hexagonal flat end set screw 23, a valve core 24, a sealing ring 25, a supporting ring 26 and a valve cover 27. The utility model discloses a two-way lock of cartridge formula is middle symmetrical structure, offer the PA mouth at the upside of valve body 10, the PB mouth, keep away from the PA mouth in the relative one side of valve body 10, the A2 mouth is seted up to the direction of PB mouth, the B2 mouth, there is the joint 21 for threaded connection with it in valve body 10 both sides, the one end that connects 21 sets up to A1 mouth, the B1 mouth, set up cascaded cavity and with the A1 mouth that connects 21 department in the joint 21, the B1 mouth communicates with each other, place case 24 in the first order of connecting 21, restrict its displacement distance, reset spring 22 is placed to the second order, and cooperate with case 24 inner chamber, place sealing ring 25 in case 24's conical surface sealing department, it is vice to make it form the conical surface sealing with case 24, valve gap 27 is placed to sealing ring 25 right-hand member, valve gap 27 and connect and fix with interior hexagonal flat end holding screw 23 between 21, place support ring 26 between sealing ring 25 and valve gap 27, valve gap 27 closely laminates with valve body 10 inner chamber boss, place piston 11 in valve body 10 center department, make it can be nimble about the activity.

The working principle of the plug-in type bidirectional lock is as follows: the utility model discloses use the emulsion as working medium usually, when the PA mouth feed liquor, along with the continuous increase of the high-pressure liquid of the sealed pair department of conical surface of case 24, case 24 overcomes reset spring 22's spring force and moves left, and high-pressure liquid gets into from the PA mouth this moment, leads the liquid hole through valve gap 27 drain hole, case 24 drain hole, joint 21 drain hole, gets into jack working chamber at A1 mouth, A2 mouth. At this time, as the pressure of the high-pressure liquid in the inner cavity of the valve core assembly 20 continuously rises, the high-pressure liquid enters between the valve core assembly 20 and the piston 11 along with the space between the valve cover 27 and the boss of the inner cavity of the valve body 10, and further pushes the piston 11 to move rightward. The piston 11 pushes the left end face of the right spool 24 to open the conical sealing pair of the right spool 24, so that the port B1, the port B2 and the port PB form a passage, and high-pressure liquid in the other cavity of the jack flows back into the valve body from the port B1 and the port B2 and flows out from the port PB. When no high-pressure liquid exists at the position of the PA port, the conical surface sealing pair of the left valve core 24 is closed due to the rightward movement of the return spring 22, so that the high-pressure liquid at the positions of the A1 port and the A2 port cannot flow back, and the hydraulic jack is in a locking state at the moment. Meanwhile, because the port PA has no high-pressure liquid, the left end face of the piston 11 has no pressure, the piston moves leftwards due to the spring force of the return spring 22 on the right side, the high-pressure liquid at the ports B1 and B2 cannot continuously flow back, and the hydraulic jack is also in a locking state.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical scheme of the utility model can be directly applied to other occasions, all within the protection scope of the utility model.

Claims (4)

1. A plug-in type two-way lock comprises a valve body and a valve core assembly, and is characterized in that the valve core assembly comprises a connector in threaded connection with the valve body, a return spring, a hexagon socket flat-end set screw, a valve core, a sealing ring, a supporting ring and a valve cover, the plug-in type two-way lock is of a middle symmetrical structure, a PA port and a PB port are arranged on the upper side of the valve body, an A2 port and a B2 port are arranged on the opposite side of the valve body in the directions away from the PA port and the PB port, the connector in threaded connection with the valve body is arranged on the two sides of the valve body, one end of the connector is provided with an A1 port and a B1 port, the joint is internally provided with a stepped cavity which is communicated with an opening A1 and an opening B1 at the joint, a valve core is placed on the first step of the joint to limit the displacement distance, a reset spring is placed on the second step and is matched with the inner cavity of the valve core, a sealing ring is placed at the conical surface sealing position of the valve core to form a conical surface sealing pair with the valve core, a valve cover is placed at the right end of the sealing ring, the valve cover and the joint are fixed by an inner hexagonal flat end fastening screw, a supporting ring is placed between the sealing ring and the valve cover, the valve cover is tightly attached to a boss in the inner cavity of the valve body, and a piston is placed at the center of the valve body to enable the valve cover to move left and right flexibly.

2. The cartridge type bi-directional lock of claim 1, wherein: the valve core assembly is in threaded connection with the valve body.

3. The cartridge type bidirectional lock according to claim 1, characterized in that: a plurality of liquid guide holes are uniformly distributed on the valve cover, the joint and the valve core.

4. The cartridge type bi-directional lock of claim 1, wherein: the piston adopts a symmetrical double-sealing structure.

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