CN202215521U

CN202215521U - Plug-in type one-way lock

Info

Publication number: CN202215521U
Application number: CN2011203333821U
Authority: CN
Inventors: 李福洪; 朱述群
Original assignee: Julong Group Wuhu Xinglong Hydraulic Co Ltd
Current assignee: Julong Group Wuhu Xinglong Hydraulic Co Ltd
Priority date: 2011-09-06
Filing date: 2011-09-06
Publication date: 2012-05-09
Anticipated expiration: 2021-09-06

Abstract

The utility model discloses a plug-in type one-way lock which comprises a valve bush, a valve plug spring, a valve plug, a valve seat, an ejector rod spring, an ejector rod and a valve body, wherein the valve plug spring is arranged inside an inner cavity of the valve bush, one end of the valve plug spring pushes at the inner end of the valve bush, the other end of the valve plug spring is used for supporting the valve plug, the valve seat and the valve bush are inside threaded connection, the ejector rod spring with supporting effect is arranged inside the inner cavity of the valve bush, the tail end of the ejector rod spring is used for supporting the ejector rod, the ejector rod is limited at the inner part of the valve seat under the effect of a check ring, and a whole hydraulic component is combined into a whole to be put inside the valve body. The plug-in type one-way lock has compact structure, high system integration level and long service life and is easy to install and maintain; and the one-way lock is repaired by directly replacing the plug-in type hydraulic component, which is simple and convenient.

Description

The unidirectional lock of a kind of plug-in type

Technical field

The utility model relates to unidirectional lock field, relates in particular to a kind of coal mine hydraulic supporting with the unidirectional lock of plug-in type.

Background technique

Unidirectional lock plays the control unit of controlling non-return valve opening and closing in hydraulic system, in hydraulic support, mainly play the support and the unloading effect of control one-way cylinder; Generally be used in flexible very heavy on; Because this structure can keep the single effect pressure-bearing of unidirectional feed liquor maintenance oil cylinder, simultaneously, when claiming back; Make spool open stable retraction through the effect of hydraulic control mouth.Traditional unidirectional lock much all adopts valve pad contact seal, structural types such as many parts; Working life is low on the one hand; Assemble inconvenient maintenance on the other hand, on coal mine work area, influence very much ordinary production, press for a kind of long service life; The unidirectional lock of compact structure, we have released a kind of unidirectional lock of plug-in type of hard sealing structure through design for a long time, accounting, experiment.

The model utility content

The utility model purpose provides the unidirectional lock of a kind of plug-in type, with the unidirectional lock that solves existing technology fragile, the systematize level of integration is low and the problem of maintenance difficult.

In order to achieve the above object, the technological scheme that the utility model adopted is:

The unidirectional lock of a kind of plug-in type includes valve pocket, valve core spring, spool, valve seat, push rod spring, push rod, valve body, and described valve pocket inner chamber contains valve core spring; Valve core spring one end withstands on valve pocket the inner, and the other end is supporting spool, valve seat and valve pocket through being threaded, and valve base cavity has the push rod spring that plays a supportive role; The end support push rod; Push rod is inner at valve seat in back-up ring effect limit, and whole hydraulic package is integrated, and puts into valve body.

The advantage of the utility model:

The utility model compact structure, high, the long service life of level of integrated system are easy to installation and maintenance, directly repair this unidirectional lock through changing the plug-in type hydraulic package, and be simple and convenient.

Description of drawings

The structural representation of Fig. 1 the utility model.

Embodiment

With reference to Fig. 1.The unidirectional lock of a kind of plug-in type is equipped with the plug-in type hydraulic package, and described hydraulic package comprises valve pocket 1, valve core spring 2, spool 3, valve seat 4, push rod spring 5, push rod 6, valve body 7; Described valve pocket 1 inner chamber contains valve core spring 2; Valve core spring 2 one ends withstand on valve pocket 1 the inner, and the other end is supporting spool 3, valve seat 4 and valve pocket 1 through being threaded, and valve seat 4 inner chambers have the push rod spring 5 that plays a supportive role; End support push rod 6; In valve seat 4 inside, whole hydraulic package is integrated push rod 6, puts into valve body 7 in back-up ring 8 effect limit.

Two active chamber structures are identical; Its working principle is following: the Placement of this unidirectional lock is: the PA mouth connects selector valve work sap cavity; The relative work sap cavity of selector valve that the PB termination is corresponding with PA; The A mouth connects a chamber of wanting the locking oil cylinder, and the B mouth connects another chamber that does not need locking of this oil cylinder, and A ' mouth connects safety valve or adds stifled.

When operating mode need be controlled cylinder action; Selector valve connects the work sap cavity of PA interface and opens feed flow; High-pressure work liquid gets into the PA mouth and pushes spool 3 open, and working solution gets into the back and gets into the oil cylinder locked cavity through the A mouth, and the chamber action of this oil cylinder is stretched out; When the PA end stopped feed flow, spool 3 formed the working solution locking that the metal hard-sealing collateral is held this oil cylinder active chamber with valve seat 4 under the pressure of Returnning spring; When operating mode need be controlled the oil cylinder withdrawal; Selector valve connects the work sap cavity of PB interface and opens feed flow; The high-pressure work liquid part promotion piston that gets into from the PB end backs down spool 3; Open spool 3 and carry out off-load, make locked cavity liquid flow into the liquid return pipe road through PA, another part gets into the non-locked cavity of oil cylinder through the B mouth regains locked cavity this active chamber feed liquor.When the PB end stopped feed flow, piston resetted under the little spring effect, and spool 3 forms the sealing pressurize with valve seat 4.

Claims

1. the unidirectional lock of plug-in type includes valve pocket, valve core spring, spool, valve seat, push rod spring, push rod, valve body, it is characterized in that: described valve pocket inner chamber contains valve core spring; Valve core spring one end withstands on valve pocket the inner, and the other end is supporting spool, valve seat and valve pocket through being threaded, and valve base cavity has the push rod spring that plays a supportive role; The end support push rod; Push rod is inner at valve seat in back-up ring effect limit, and whole hydraulic package is integrated, and puts into valve body.