CN2266042Y - Hydraulic chock running valve - Google Patents

Abstract

The utility model discloses an operating valve suitable for the hydraulic support used for the coal cutting of a coal mine. The valve core of a valve core component is arranged in the hole on the center part of a valve sleeve. The left end of a valve adopts a fixed plug to tightly press a valve seat and the right end lies against the hollow shoulder table of the valve sleeve by the shoulder table on the outer circle of the valve core. Thus the valve core is an integral valve core (component) structure. The utility model can be integrally arranged in or taken out from a valve hole after the individual assembly to enable the assembly technique to be simpler and the downhole repair to be more convenient. The same dimension size with the valve in the same type is kept and each liquid passing area in the valve is enlarged by the structural design and the liquid passing capability is increased. The liquid return opening and the working opening in the valve are contiguous to effectively reduce the liquid return resistance. The work efficiency of a hydraulic system is improved.

Description

The hydraulic support control valve

The utility model relates to a kind of control valve, especially the coal mining employed a kind of control valve of hydraulic support.In the colliery industry, also there is the people this valve to be called " hydraulic support reversal valve " and " hydraulic support control valve ".

Control valve makes action of hydraulic support operating mechanism and commutation in the hydraulic support control system, in the hydraulic support control system consequence is arranged.The employed medium of hydraulic support control system is emulsion (95% neutral water and 5% oil emulsion mixed liquor), because subsurface environment is very abominable, there are a large amount of corrosive substances and coal dust, hydraulic system is not contaminated unavoidably, cause the Hydraulic Elements fault rate high, just bring white elephant to service work.The colliery scientific worker is also tackling key problems on the structure of element except from the material of element is improved at present, makes Hydraulic Elements be more convenient for keeping in repair and changing, with operating efficiency and the reduction working strength of workers that improves maintenance.The spool of the control valve that uses is bulk structure now, as the patent No. for 91230794.3 and the patent No. 91203634.6 valves of the same type that provided are provided, its each part of forming spool is independently part, the workpeople gets assembly relation easily wrong when dismounting, and part loses easily, and secondly, the down-hole does not have cleaning condition, when adorning again again after part is pulled down, can bring impurity such as coal dust into hydraulic system.

Main purpose of the present utility model will provide the control valve of a kind of whole spool (assembly) structure exactly, makes assembling and maintenance all very convenient, meanwhile, notes changing position, valve inner passage, makes liquid flow more unobstructed, and the pressure loss is littler, increases fluid flow.

The purpose of this utility model is finished by following approach:

A kind of hydraulic support control valve, comprise joint, spring, valve body, core assembly and operating mechanism, described joint and valve body connect firmly with screw thread, spring places the stepped hole of joint right-hand member hollow, core assembly links by screw thread and valve body, operating mechanism links with the right side of four bolts and valve body, spool in the described core assembly places the hole in valve pocket centre, left end compresses valve seat and makes it spacing at left end with fixing stifled, right-hand member leans against the shoulder upper limit of valve pocket hollow by the shoulder on the spool cylindrical, valve seat and spring place push rod cylindrical shoulder to lean against the left side, the left end of push rod and the right-hand member of spool produce a kind of unsteady connection after by the screw thread transition, and whole core assembly is the overall structure of jointing type.

The utility model can be assembled into spool independently parts owing to adopted said structure, makes assembling and keeps in repair more convenient.

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

Accompanying drawing 1 is the whole valve arrangement sectional view of the utility model;

Accompanying drawing 2 is the core assembly sectional view in the accompanying drawing 1.

As Fig. 1, whole valve group is made up of joint (1), spring (2), valve body (4), core assembly (8) and operating mechanism (15), two valve openings are that symmetrical parallel distributes with the section center line in valve body (4), and the each several part structure is identical in two valve openings, is used for controlling respectively two working chambers of an operating mechanism.Joint (1) connects firmly with valve body (4) mutually by screw thread (3), spring (2) places in the stepped hole of joint (1) right-hand member hollow, core assembly (8) connects with valve body by screw thread (13), and operating mechanism (15) is installed in the right side of valve body (4) shown position with four bolts (14).In order to cross the needs of liquid, at valve body 94) appropriate location of valve opening has several annulars and crosses liquid bath (6), on valve body (4) section center line, is provided with hole for back flow T and inlet opening P.Hole for back flow T communicates with the system fuel tank, and inlet opening P communicates with system pumping plant supply opening.

As Fig. 2, be core assembly (8), after it can independent groups installs from valve opening integral body pack into or take out, when packing valve opening into, insert in top stem casing (27) right side two blind holes (40) and be screwed into valve body (4), till step surface (10) (see figure 1) is close in valve seat (25) is located step surface (24) and valve opening along screw thread (13) rotation direction with special tool.Top stem casing (27), valve seat (25) and rectangular seal pad (23) connect firmly together with valve body (4) like this, also guaranteed that valve port (5) is corresponding with hole for back flow T among Fig. 1 this moment, valve port (9) (not opening) is corresponding with inlet opening P among Fig. 1, remaining parts in the core assembly (8) can move back and forth within the specific limits along the valve opening axis direction, realize the keying of valve port (5) and (9), play the effect of switching oil circuit.

In core assembly (8), fixing stifled (19) are arranged, its center is hollow, so that cross liquid, it and valve pocket (22) link with screw thread (28) form simultaneously, and valve seat (20) is fastened on valve pocket (22).The right side design of valve seat (20) has inner conical surface (29), and what cooperate with it is the male cone (strobilus masculinus) (30) of spool (7) left end, and two conical surfaces have just constituted time liquid valve port (5).The stepped hole of the right-hand member of spool (7) and push rod (12) left end by screw thread after axial transitions, produce a kind of unsteady connection (37) form, spool (7) and push rod (12) axially can realized interlock like this, the benefit of this structure is for the consideration on the assembly technology, and eliminates the influence that part's machining errors is brought.Position Design at the close left end of valve pocket (22) has annular to cross liquid bath (32), and at along the circumferential direction uniform several inclined holes of bottom land (31), inclined hole (31) is crossed liquid bath (32) with annular and linked up with liquid return hole (5).In the design of the right side of valve pocket (22) seam (35) is arranged, seam end face and rectangular seal pad (23) left surface constitute feed liquor valve port (9) (being illustrated as closed condition), right-hand member design at valve pocket (22) simultaneously has stepped hole (34), it and spool (7) outer ring circularized liquid bath (33), cross liquid bath again by the radial hole (36) on the spool (7) and the hole (21) in centre, communicate with hole for back flow T and working hole A1 among Fig. 1.The design of push rod (12) centre has the region between the heart and the diaphragm hole (38), and communicate with spring cavity (39) by radial hole (26), hole (26), (38) communicate with hole for back flow T and working hole A1 by the step through-hole on the spool again, this is for when working, the suffered axial hydraulic power of the movable part of core assembly (8) can be offset a part, thereby reduces operating physical force.

As Fig. 1, when operate as normal, (principle that pushes the work forward downwards is identical when upwards promoting with handle (18) for the operator, only working position work down), handle drives also homodromous movement of cam (17), cam (17) presses briquetting (16) and makes moving-member in push rod (12) and the valve, moves to left along the valve opening axis direction.At first push rod (12) promotes spool (7) and moves to left, when spool (7) the left end conical surface with after the valve seat conical surface contacts, valve port (5) is promptly closed, A1 mouth and T cut-out.When push rod (12) when continuing to move to left, will drive valve pocket (22) and move to left together, at this moment inlet (9) is opened, and P and A1 mouth are connected, and high pressure liquid constantly enters operating mechanism, makes operating mechanism by predetermined working method action.When operating mechanism need quit work, operating grip (18) returned to meta again, and valve pocket (22), spool (7) are under the effect of spring (2) and (11) and hydraulic coupling, position to Fig. 1 moves to right, at this moment, inlet P and working hole A1 cut off, and hole for back flow T communicates with working hole A1.When operating grip (18) when pushing away downwards, the operating principle of valve is same as described above, and this moment, operating mechanism's counteragent was finished the one action circulation.

Claims (3)

1, a kind of hydraulic support control valve, comprise joint (1), spring (2), valve body (4), core assembly (8) and operating mechanism (15), described joint (1) connects firmly with screw thread with valve body (4), spring (2) places the stepped hole of joint (1) right-hand member hollow, core assembly (8) links by screw thread (13) and valve body (4), operating mechanism (15) links with the right side of four bolts (14) with valve body (4), it is characterized in that, spool (7) in the described core assembly (8) places the hole in valve pocket (22) centre, left end compresses valve seat (20) with fixing stifled (19) makes it spacing at left end, right-hand member leans against the shoulder upper limit of valve pocket (22) hollow by the shoulder on spool (7) cylindrical, valve seat (25) and spring (11) place the left side of push rod (12) cylindrical shoulder, the right-hand member of the left end of push rod (12) and spool (7) produces a kind of unsteady connection after by the screw thread transition, and whole core assembly (8) is the overall structure of jointing type.

2, control valve according to claim 1 is characterized in that, the working hole A1 that described valve body (4) is gone up in liquid return hole T and the described joint (1) is adjacent.

3, control valve according to claim 1 and 2, it is characterized in that in the described core assembly (8), fixing stifled (19), valve seat (20), spool (7) are hollow structure, push rod (12) left end is the region between the heart and the diaphragm hole, and communicates with spring cavity (39) by hole (26).

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