CN201496083U

CN201496083U - Hand-operated pilot valve

Info

Publication number: CN201496083U
Application number: CN2009203099437U
Authority: CN
Inventors: 徐德军; 沈雪松; 刘学垠; 陈建先
Original assignee: SICHUAN SHENKUN EQUIPMENT CO Ltd
Current assignee: SICHUAN SHENKUN EQUIPMENT CO Ltd
Priority date: 2009-09-09
Filing date: 2009-09-09
Publication date: 2010-06-02
Anticipated expiration: 2019-09-09

Abstract

The utility model discloses a hand-operated pilot valve, which comprises a valve body. The valve body is provided with two valve cavities. The inside of each valve cavity is provided with a spring seat, a lower valve sleeve, a returning spring, a valve core and an upper valve sleeve. The valve core is in inner circle sliding fit with the upper and lower valve sleeves. Holes of the spring seat, the lower valve sleeve and the upper valve sleeve have the same diameter. The utility model has the advantages that: the structure is very simple; each pilot valve can control two functions of a main reversing valve; the hand-operated pilot valve has less internal parts, single structure, easy processing and excellent sealing performance, and can overcome problems of serious seal leakage and liquid leakage of the existing pilot valve in the pit; and the design of the valve core balances the internal hydraulic pressure, thereby the hand-operated pilot valve saves more labor when operating a handle so as to reduce the design length of the handle and save the design space to make the hand-operated pilot valve have higher operability in the pit.

Description

Manual pilot valve

Technical field

The utility model relates to a kind of manual pilot valve that is used for the coal mine hydraulic supporting main reversing valve.

Background technology

At present, domestic hydraulic support main reversing valve mainly adopts manual control and pilot valve control dual mode, and manually control is because working strength is big, efficient is hanged down and progressively replaced by pilot valve control.Pilot valve has two kinds of manual and electronic controls, for manual pilot valve, generally use and press cam with the action bars of guide's valve body on a horizon and control guide's spool and move, reach the purpose that makes the main reversing valve commutation, because operational torque is big, very effort operates, and it is laborsaving in order to operate, action bars just need design very longly, therefore the space that occupies is very big, when the workman particularly when neighboring frame-operated, seems extremely inconvenient in the down-hole on Bracket in Thin Coal Seam, and this type of manual pilot valve structure is also comparatively complicated, for the seal leakage of frequent appearance, corrective maintenances such as string liquid are also inconvenient.Yet with respect to the complexity of automatically controlled pilot valve, expensive and high fault rate, to a certain extent, manually pilot valve is very desirable.

The utility model content

The utility model has overcome shortcoming of the prior art, the manual pilot valve of provide a kind of simple in structure, handling ease, being convenient to dismantle and keep in repair, have high reliability and high operating characteristics on coal mine underground hydraulic support frame.

The technical solution of the utility model is: a kind of manual pilot valve, comprise valve body, on described valve body, offer two valve pockets, spring base, lower valve sleeve, back-moving spring, spool and upper valve sleeve be installed in each valve pocket successively, spool and upper valve sleeve, lower valve sleeve be interior slyness movingly; The hole of described spring base, lower valve sleeve and upper valve sleeve for together the footpath straight hole.

On the inside and outside circle of described upper valve sleeve, lower valve sleeve is axial, respectively have three oil grooves and four seal grooves, wherein three oil grooves are respectively admission chamber P, control chamber K, time sap cavity T, each four seal groove on the inside and outside circle are equipped with valve pocket sealing ring and valve core seal ring respectively, and three chambeies are separated.

Have an endoporus on described spool, the hole end surface weldering is stifled.

On described spool circumference, have two row's apertures, four of every rows, circumference uniform distribution, the diameter of aperture is much smaller than the diameter of the valve core seal ring of crossing this hole.

The plug that is arranged on valve body top is located by dog screw.

Compared with prior art, the utility model has the advantages that: structure is very simple, each pilot valve can be controlled two functions of main reversing valve, inner body is less and structure is single, handling ease, sealing performance is fine, can overcome present down-hole pilot valve seal leakage, the serious problem of string liquid, in addition the design balance of spool internal hydraulic pressure power, make when operating grip more laborsaving, thereby can reduce the design length of handle, the save design space makes this manual pilot valve have higher operating performance in the down-hole.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is an internal construction sectional view of the present utility model;

Fig. 2 is the sectional view of dog screw of fixedly plug of the present utility model and the schematic diagram that handle is in zero-bit.

The specific embodiment

Disclosed all features in this manual, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.

Disclosed arbitrary feature in this manual (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.

A kind of manual pilot valve, comprise valve body 1, be installed in the spring base 2 in the valve body, lower valve sleeve 3 and upper valve sleeve 6, with upper valve sleeve, slick and sly spool 5 movingly in the lower valve sleeve, realize the back-moving spring 4 of pilot valve commutation function, push rod 9, handle 15, be used to support plug 10 with position fixing handle 15, nut 11, spring washer 13, dog screw 14, latch 12, and three oil grooves and four seal grooves of on upper valve sleeve 6 lower valve sleeves 3 inside and outside circles are axial, respectively leaving, wherein three oil grooves are respectively admission chamber P, control chamber K, return sap cavity T, each four seal groove on the inside and outside circle are adorned valve pocket sealing ring 7 and valve core seal ring 8 respectively, three chambeies are separated, spool 5 has an endoporus, the hole end surface weldering is stifled, reach the test pressure requirement, have the aperture (a of two row Φ 0.5 on spool 5 circumference, b), four of every rows, circumference uniform distribution, be used to be communicated with endoporus, the diameter of aperture is less than the diameter of phi 1.5 of the valve core seal ring 8 of crossing this hole.

Operating principle of the present utility model: when handle 15 is in zero-bit (handlebar and valve body parallel sided), control chamber K is communicated with time sap cavity T, control chamber K can not get controlling liquid, main reversing valve is failure to actuate, when handle 15 lifts (handlebar is probably vertical with the valve body side), admission chamber P is communicated with control chamber K, control liquid enters control chamber, the commutation of control main reversing valve, when not needing to commutate, decontrol handle 15, back-moving spring 4 pushes up back spool 5, admission chamber P disconnects with control chamber K and being connected, and handle 15 comes back to zero-bit.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. manual pilot valve, comprise valve body, it is characterized in that: on described valve body, offer two valve pockets, spring base, lower valve sleeve, back-moving spring, spool and upper valve sleeve be installed in each valve pocket successively, spool and upper valve sleeve, lower valve sleeve be interior slyness movingly; The hole of described spring base, lower valve sleeve and upper valve sleeve for together the footpath straight hole.

2. manual pilot valve according to claim 1, it is characterized in that: on the inside and outside circle of described upper valve sleeve, lower valve sleeve is axial, respectively have three oil grooves and four seal grooves, wherein three oil grooves are respectively admission chamber P, control chamber K, time sap cavity T, each four seal groove on the inside and outside circle are equipped with valve pocket sealing ring and valve core seal ring respectively, and three chambeies are separated.

3. manual pilot valve according to claim 1 is characterized in that: have an endoporus on described spool, the hole end surface weldering is stifled.

4. manual pilot valve according to claim 1 is characterized in that: on described spool circumference, have two row's apertures, and four of every rows, circumference uniform distribution, the diameter of aperture is much smaller than the diameter of the valve core seal ring of crossing this hole.

5. manual pilot valve according to claim 1 is characterized in that: the plug that is arranged on valve body top is located by dog screw.