CN217582199U

CN217582199U - Plate type bidirectional lock

Info

Publication number: CN217582199U
Application number: CN202221093534.XU
Authority: CN
Inventors: 李小琴; 高克玄
Original assignee: Shaanxi Globo Mechanical Equipment Co ltd
Current assignee: Shaanxi Globo Mechanical Equipment Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-10-14
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses a two-way lock of board-like, including valve body and case subassembly. The valve core assembly comprises a valve core bushing in threaded connection with the valve body, a valve cover in threaded connection with the valve core bushing, a compression spring, an overload protection device, a valve core, a reset spring, a valve cone, a guide sleeve and a valve seat. 6 placing holes are formed in the upper side and the lower side of the valve body, and the valve core assembly is placed on the outermost side of the lower side of the valve body. The opening and the locking of two cavities of a hydraulic jack in a hydraulic system are realized through different working states of the two sets of valve core assemblies, and the safety and the working efficiency of the hydraulic support in working are ensured. Adopt the utility model discloses a board-like two-way lock compact structure, sealing performance are reliable, dependable performance, long service life.

Description

Plate type bidirectional lock

Technical Field

The utility model belongs to a colliery hydraulic pressure field, concretely relates to two-way lock of board-like.

Background

The bidirectional lock is mainly used for a coal mine hydraulic support, controls the balance of the hydraulic support, protects the action of a hydraulic jack, and can keep the hydraulic support in a certain working state for a long time, so that the hydraulic support plays a corresponding supporting role under the action of the hydraulic support. The current bidirectional lock has a complex structure and is not easy to disassemble, and a sealing ring and a gasket in the valve need to be periodically overhauled and replaced so as to prevent the safety of the hydraulic support from being influenced.

Disclosure of Invention

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

In order to achieve the purpose, the plate type bidirectional lock comprises a valve body and a valve core assembly. The valve core assembly comprises a valve core bush, a valve cover, a compression spring, an overload protection device, a valve core, a reset spring, a valve cone, a guide sleeve and a valve seat, wherein 6 placing holes are arranged on the upper side and the lower side of the valve body, the upper side is provided with a PA port and a PB port, the middle two holes on the lower side are provided with an A1 port and a B1 port, the valve core assembly is arranged on the outermost two sides of the lower side, the bottom surface of the valve body is provided with an A2 port and a B2 port, taking the valve core assembly on one side as an example, the valve core bush is in threaded connection with the lower side of the valve body, a boss at the right end of the valve core bush is placed at a boss position corresponding to the valve body, the accuracy of the installation position of the valve core assembly is ensured, the right end of the valve core bush and the valve cover are in threaded connection, liquid guide holes are uniformly distributed on the valve cover, the right end part of the valve core is placed on the inner side of the valve cover, an overload protection device is placed at the right end of the valve core, a compression spring is placed on the right side of the overload protection device, a valve seat is placed on the left end face of a valve core bushing, two groups of liquid guide holes R are uniformly distributed on the right end of the valve core bushing, a reset spring of the valve core is placed on the rightmost side in an inner cavity of the left end of the valve core bushing, a guide sleeve and a valve cone are sequentially placed at the left end of the reset spring, two opposite bosses are respectively formed at the left end of the valve core and are respectively opposite to the valve cone and the boss of the inner cavity of the valve body, a Z port on the left end face of the valve core and a P port are communicated with a P1 port and a P2 port through the liquid guide holes.

The plate-type bidirectional lock valve cover inner cavity structure ensures that when the valve core assembly receives larger pressure, high-pressure liquid overflowing from the left end of the valve core assembly can be discharged along with the liquid guide hole on the valve sleeve, and the valve core assembly is greatly protected.

The plate-type bidirectional lock is characterized in that a plurality of liquid passing holes are uniformly distributed in the valve cover and the valve core bushing to ensure that working liquid can smoothly pass through the inner cavity of the valve core bushing.

The plate-type bidirectional lock is used for carrying out proper selection and reasonable clearance fit on materials of an overload protection device, a valve seat, a valve cone and a valve core, and the plate-type bidirectional lock is guaranteed to move flexibly and reliably.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line N-N of FIG. 1;

FIG. 3 is a cross-sectional view taken along line M-M of FIG. 1;

FIG. 4 is a cross-sectional view taken along line L-L of FIG. 1;

FIG. 5 is a cross-sectional view of a valve cartridge according to an embodiment of the present invention;

fig. 6 is a schematic view of a hydraulic principle of the embodiment of the present invention.

Labeled in the figure as: 10. a valve body; 20. a valve core assembly; 21. a valve core; 22. a valve seat; 23. a valve cone; 24. a guide sleeve; 25. a compression spring; 26. a spool bushing; 27. an overload protection device; 28. a return spring; 29. a valve cover; 101. 102, 103, 104, 105, 106 and a liquid guide hole.

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 plate type bidirectional lock comprises a valve body 10 and a valve core assembly 20. The valve core assembly 20 comprises a valve core bush 26, a valve cover 29, a compression spring 25, an overload protection device 27, a valve core 21, a return spring 28, a valve cone 23, a guide sleeve 24 and a valve seat 22, wherein 6 placing holes are formed in the upper side and the lower side of the valve body 10, the upper side is a PA port and a PB port, the middle two holes in the lower side are an A1 port and a B1 port, the valve core assembly 20 is placed on the outermost side of the lower side, the bottom surface of the valve body 10 is provided with an A2 port and a B2 port, taking the valve core assembly 20 on one side as an example, the valve core bush 26 is in threaded connection with the lower side of the valve body 10, a boss at the right end of the valve core bush 26 is placed at a boss position corresponding to the valve body 10, the accuracy of the mounting position of the valve core assembly 20 is ensured, the right end of the valve core bush 26 is in threaded connection with the valve cover 29, the valve cover 29 is uniformly provided with liquid guide holes, the right end part of the valve core 21 is arranged on the inner side of the valve cover 29, the overload protection device 27 is arranged at the right end of the valve core 21, the compression spring 25 is arranged at the right side of the overload protection device 27, the valve seat 22 is arranged at the left end surface of the valve core bush 26, two groups of liquid guide holes R ports are uniformly arranged at the right end of the valve core bush 26, the reset spring 28 of the valve core 21 is arranged at the rightmost side in the inner cavity at the left end of the valve core bush 26, the guide sleeve 24 and the valve cone 23 are sequentially arranged at the left end of the reset spring 28, two opposite bosses are respectively arranged at the left end of the valve core 21 and are respectively opposite to the bosses at the inner cavities of the valve cone 23 and the valve body 10, and the Z port and the P port of the left end surface of the valve core 21 are communicated with the P1 and the P2 ports through the liquid guide holes.

The working principle of the plate-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 high-pressure liquid of left side case 21's right side boss department constantly increases, left side case 21 promotes valve cone 23 and 24 spring force downstream that overcome compression spring 25 of uide bushing to open the conical surface sealing pair between valve cone 23 and the disk seat 22, make high-pressure liquid get into from the PA mouth, through leading liquid hole 101, case P mouth, case R mouth, lead liquid hole 105, from A1 mouth, the outflow of A2 mouth. At this time, the high-pressure liquid at the position of the PA port also contacts with the port Z of the right spool 21 through the liquid guide hole 103, so that the right spool 21 pushes the valve cone 23 and the guide sleeve 24 one by one, and the conical surface sealing pair between the valve cone 23 and the valve seat 22 of the right spool is opened, so that the high-pressure liquid flowing back from the ports B1 and B2 at the position of the right spool finally flows out from the port PB through the liquid guide hole 106, the port R of the right spool, the port P of the spool, and the liquid guide hole 102. When no high-pressure liquid exists at the position of the port PA, the conical surface sealing pair of the left valve core 21 is closed due to the upward movement of the compression spring 25, so that the high-pressure liquid at the positions of the ports A1 and A2 cannot enter, and the hydraulic jack is in a locking state at the moment. Meanwhile, as no high-pressure liquid exists at the PA port and no pressure exists at the Z port of the valve core at the right side, the spring force of the compression spring 25 at the right side moves upwards, the high-pressure liquid at the B1 port and the B2 port 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. As long as the method conception and the technical scheme of the utility model are adopted for various insubstantial improvements; 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

1. A plate-type bidirectional lock comprises a valve body and a valve core assembly, and is characterized in that the valve core assembly comprises a valve core lining, a valve cover, a compression spring, an overload protection device, a valve core, a reset spring, a valve cone, a guide sleeve and a valve seat, wherein 6 placing holes are formed in the upper side and the lower side of the valve body, a PA port and a PB port are formed in the upper side, a port A1 and a port B1 are formed in the middle of the lower side, the valve core assembly is placed on the outermost side of the lower side, a port A2 and a port B2 are formed in the bottom surface of the valve body, for example, the valve core assembly on one side is adopted, the valve core lining is in threaded connection with the lower side of the valve body, a boss at the right end of the valve core lining is placed at a boss position corresponding to the valve body, the right-hand member of case bush rather than the valve gap that is threaded connection, the last equipartition of valve gap is seted up and is led the liquid hole, the right-hand member part of case is placed to the valve gap inboard, overload protection device is placed to the case right-hand member, compression spring is placed on overload protection device right side, the disk seat is placed to case bush left end face, and set up two sets of drain hole R mouths at case bush right-hand member equipartition, in case bush left end inner chamber, the reset spring of case is placed on the rightmost side, uide bushing and valve cone are placed in proper order to reset spring's left end, two relative bosss are seted up respectively to the case left end, it is relative with valve cone and valve body inner chamber boss respectively, case left end face Z mouth, P mouth communicates with each other through leading the liquid hole with P1, P2 mouth.

2. The plate bi-directional lock of claim 1, wherein: the valve cover and the valve core bushing are uniformly provided with a plurality of liquid passing holes.