CN201129328Y

CN201129328Y - Static pressure balance type change valve

Info

Publication number: CN201129328Y
Application number: CNU2007201737720U
Authority: CN
Inventors: 生凯章; 夏赣民; 赵远东
Original assignee: FENGHUO MACHINE WORKS OF CHINA AEROSPACE SCIENCE AND TECHNOLOGY Corp
Current assignee: FENGHUO MACHINE WORKS OF CHINA AEROSPACE SCIENCE AND TECHNOLOGY Corp
Priority date: 2007-10-24
Filing date: 2007-10-24
Publication date: 2008-10-08
Anticipated expiration: 2017-10-24

Abstract

Disclosed is a static balanced reversing valve which is mainly formed by a valve body and a valve plug component. The valve plug component is mounted in the valve body, the valve plug component mainly comprises an ejector rob, a control shuttle rod, an oil inlet valve plug, a control valve base, a valve base, an adjusting member, a spring component and a pressing member, wherein the ejector rod, an oil returning valve plug, the control shuttle rod and the oil inlet valve plug are mounted in the control valve base and the valve base coaxially, adjusting screws, the spring component, the valve base, the control valve base and pressing screw nuts are mounted inside the valve body sequentially, and the position of the valve plug component in the casing is adjusted by the combined action of the adjusting screws and the pressing screw nuts. The external force transmits the acting force to the valve plug component utilized a ball valve plug via the ejector rob to realize opening and closing of the reversing valve. The reversing valve of the utility model has the advantages of uniform forcing, easy processing and low cost.

Description

Static balance formula selector valve

Technical field

The utility model is the electrichydraulic control pilot valve of the control main valve body in the step-type support that is mainly used in the subsurface excavation device particularly of digging up mine.

Background technique

In disclosed patent DE19646611.3, name is called electro-hydraulic control valve, and it can be set concrete switching power and switch stroke, is used in the underground mining operation control hydraulic support.This valve is made up of electromagentic switching apparatus and two position three way directional control valve two-part.Electromagnetic force in the closed position when two position three way directional control valve is initial, as to produce by electromagnet energising, the controlling rod by electromagnet is with opening of valves.

Because the two position three way directional control valve structure of this valve is limit, flow channels is in the side of spool, and is therefore stressed obviously inhomogeneous, when this causes valve core movement easily owing to unbalance stress and clamping stagnation.

And two position three way directional control valve is made up of a lot of tiny assemblies, and clearance-adjustable is very little, and owing to adopt the end face seal form, so it is responsive to the damage ratio of hydraulic medium, filter precision is had relatively high expectations.These all cause this valve seal to lose efficacy easily, and then cause valve to damage.

The model utility content

The technical problem that the utility model solves: a kind of uniform static balance formula selector valve simple in structure, stressed is provided, is convenient to processing, operation and maintenance.

Technical solution of the present utility model: static balance formula selector valve, mainly constitute by valve body and mangetic core assembly, mangetic core assembly is installed in the valve body, it is characterized in that: described mangetic core assembly mainly comprises push rod, oil return spool, control shuttle bar, oil-feed spool, control valve seat, valve seat, adjustment piece, spring assembly, gland nut, wherein, push rod, oil return spool, control shuttle bar, oil-feed spool are contained in control valve seat and the valve seat along same axis; Adjustment piece, spring assembly, valve seat, control valve seat, gland nut are installed in the inside of valve body successively, and the position of mangetic core assembly in housing adjusted by the acting in conjunction of adjustment piece and gland nut.

Described mangetic core assembly is one or more, determines according to the quantity of working solution mouth.

The push rod of described mangetic core assembly is the carefully following stepped construction that helps hydro-cushion roughly in upper end.

Described spring assembly is made up of returning spring, spring seat and spring guide, and returning spring is contained in the spring guide, and spring guide is installed in the spring seat with leading role.

The fluid cushion sheet is set back between described control valve seat and the valve seat, returns the fluid cushion sheet and be provided with the hole that play the guiding role that cooperates with back fluid spool; The feed liquor pad is set between described valve seat and the spring seat, and the feed liquor pad is provided with the hole that play the guiding role that cooperates with the feed liquor spool.

Principle of the present utility model: the utility model adopts two steel balls as oil-feed spool and oil return spool, filler opening and oil outlet are the sealing of steel ball and valve port, undertaken spacing by control shuttle pole pair two steel balls, guarantee all have only a steel ball sealing under the working condition, oil-feed and drainback passage can not linked up.The movement parts of mangetic core assembly has self-locating function, and the gap can be adjusted, easy processing.Mangetic core assembly is fixed in the housing, only plays overcurrent, and passes through the fastening piece at regulating spool assembly two ends, relative position that can the regulating spool assembly.

The utility model advantage compared with prior art:

(1) selector valve overall structure of the present utility model is simple, and stressed even, processing is simple.

(2) selector valve of the present utility model on seal form, adopt spool (steel ball) and valve seat firmly to rigid structure because steel ball has self-correcting function, can reduce greatly the Sealing required precision, saved processing cost.

(3) selector valve of the present utility model is easy to adjust the position of reversing valve assembly in valve body by the cooperation of adjustment piece and compressing member, and in pilot valve, the adjustment of this position is concerning the size of opening required power.

Description of drawings

Fig. 1 is a static balance formula selector valve worm's eye view;

Fig. 2 is the A-A sectional view of static balance formula selector valve among Fig. 1;

Fig. 3 is a static balance formula selector valve B-B sectional view among Fig. 1;

Fig. 4 is the spring seat sectional view;

Fig. 5 is the spring seat side view.

Specific implementation method

As shown in Figure 1-Figure 3, be a kind of specific embodiment of the present utility model, the working hole among the embodiment is A and B, and the mangetic core assembly of static balance formula selector valve is two identical two-bit triplet mangetic core assemblies, on the valve body 1 of selector valve, be arranged side by side, respectively working hole A and B controlled.A two-bit triplet mangetic core assembly below only is described, and a working hole (A or B) of control, another is identical therewith.Mangetic core assembly switches filler opening and return opening with the sealing of valve seat 7 respectively by oil-feed spool 9, oil return spool 4.Push rod 3, oil return spool 4, oil-feed spool 9 and control shuttle bar 6 are assemblied in control valve seat 2 and the valve seat 7 along same axis.Be provided with flowing hole in the control valve seat 2, will introduce on the step surface of push rod 3 from the highly pressurised liquid that liquid entering hole P introduces.Simultaneously, two groups of seal rings are housed between push rod 3 and the control valve seat 2, prevent the leakage of pressure medium.When external force acted on the push rod 3, the sealing between oil-feed spool 9 and the valve seat 7 was opened, and selector valve is realized commutation.Also be provided with positioning hole, auxiliary hole and attachment hole on the valve body 1.

The spring guide 14 that returning spring 12 is equipped with in inside is installed in the spring seat 10 with leading role, the liquid passage is arranged, as shown in Figure 4 and Figure 5 in the spring seat 10.Mangetic core assembly is contained in the valve body 1, compressing member 22 and adjustment piece 13 by two ends are fixing, compressing member 22 is a gland nut 22, adjustment piece 13 is for adjusting screw, simultaneously by regulating compressing member 22 and adjustment piece 13, can adjust the position of mangetic core assembly in valve body 1,, make mangetic core assembly reach suitable position by adjusting adjustment piece.Its Placement is that high pressure line meets liquid entering hole P, and working hole A or B connect outside executive's interface, and the T mouth takes back oily interface.

Designed hydraulic balance structure on the push rod 3: the upper end of push rod is thinner than the lower end, pressure liquid is introduced in the push rod upper end, make the hydraulic coupling that acts in the work on push rod 3, oil-feed spool 9, oil return spool 4 and the control shuttle bar 6 reach balance, spool only is subjected to frictional force, and the hydraulic card clamping force of control shuttle bar 6 between reposition force, push rod 3 and the seal ring (19,20) of returning spring 12, the steering force that has reduced this opening of valves and kept.The project organization of realizing this function is: step anchor ring area and sealing valve port face area are complete or basic identical above the push rod 3, to reach the hydro-cushion effect, reduce this opening of valves and steering force of keeping or electromagnetic force.Spool only is subjected to Returnning spring power and push rod 3 control force effects in movement process.

Oil-feed pad 8 is a feed pathway, only leads with spacing to the motion of spool in the hole that feed liquor pad 8 cooperates with oil-feed spool 9, and pressure medium is mainly by the logical liquid of the circumferential apertures on the oil-feed pad 8.Oil return pad 5 is drainback passage (liquid arrives the T mouth through runner), goes back to the hole that fluid cushion sheet 5 cooperates with oil return spool 4, also only the motion of spool is led with spacing, and pressure medium is mainly by the logical liquid of the circumferential apertures on the oil return pad 5.Valve seat 7 communicates with working hole, and the shuttle bar 6 by axial installation guarantees that oil return spools 4 and feed liquor spool 9 can only have one to close the liquid mouth.

Under the off working state, i.e. position shown in Fig. 2, oil-feed spool 9 is a closed condition, and back fluid spool 4 is in opening state, and working hole A or B and oil return inlet T are connected.

During work, push rod 3 receives external force, makes oil return spool 4 close return opening, makes feed liquor spool 9 open liquid entering hole by control shuttle bar 6 simultaneously.Working hole A or B and liquid entering hole P connect, and pressure oil enters performance element.

Claims

1, static balance formula selector valve, mainly constitute by valve body (1) and mangetic core assembly, mangetic core assembly is installed in the valve body (1), it is characterized in that: described mangetic core assembly mainly comprises push rod (3), oil return spool (4), control shuttle bar (6), oil-feed spool (9), control valve seat (2), valve seat (7), adjustment piece (13), spring assembly, gland nut (22), wherein, push rod (3), oil return spool (4), control shuttle bar (6), oil-feed spool (9) are contained in control valve seat (2) and the valve seat (7) along same axis; Adjustment piece (13), spring assembly, valve seat (7), control valve seat (2), gland nut (22) are installed in the inside of valve body (1) successively, and the position of mangetic core assembly in housing adjusted by the acting in conjunction of adjustment piece (13) and gland nut (22).

2, static balance formula selector valve according to claim 1 is characterized in that: described mangetic core assembly is one or more.

3, static balance formula selector valve according to claim 1 and 2 is characterized in that: the push rod of described mangetic core assembly (3) is the carefully following stepped construction that helps hydro-cushion roughly in upper end.

4, static balance formula selector valve according to claim 1 and 2, it is characterized in that: described spring assembly is made up of returning spring (12), spring seat (10) and spring guide (14), returning spring (12) is contained in the spring guide (14), and spring guide (14) is installed in the spring seat (10) with leading role.

5, static balance formula selector valve according to claim 1 and 2 is characterized in that: between described control valve seat (2) and the valve seat (7) fluid cushion sheet (5) is set back, returns fluid cushion sheet (5) and be provided with the hole that play the guiding role that cooperates with back fluid spool (4); Between described valve seat (7) and the spring seat (10) feed liquor pad (8) is set, feed liquor pad (8) is provided with the hole that play the guiding role that cooperates with feed liquor spool (9).