CN105889163A - Hydraulic valve - Google Patents

Abstract

The invention provides a hydraulic valve which comprises a valve casing, a valve core, a spring and an end plug, wherein a flow channel is arranged in the valve casing; openings penetrating the valve casing are formed in two ends of the flow channel; one opening of the flow channel is used for being connected with a hydraulic source; the other opening of the flow channel is used for being connected with a hydraulic cylinder; the valve core comprises a body part and a head part; an accommodating groove is formed in the body part; the head part is shaped like half an egg and has an elliptic cross section; the topmost end of the head part is propped against the inner wall of the flow channel; two fluid leading-in holes are formed in the head part; one end of each fluid leading-in hole is arranged on an arc-shaped surface of the head part; the other ends of the fluid leading-in holes converge at one point on the central line of the head part and communicate with the accommodating groove of the valve core; two gaps, which gradually shrink from the hydraulic source to the positions of the fluid leading-in holes, are formed between the head part and the inner wall of the flow channel; and the spring is accommodated in the accommodating groove. The hydraulic valve provided by the invention can prevent the phenomenon that fluid is sharply supplied into the hydraulic cylinder to abruptly start lifting equipment or stereoscopic parking equipment to damage the lifting equipment or stereoscopic parking equipment.

Description

Hydraulic valve

Technical field

The present invention relates to a kind of hydraulic valve.

Background technology

The hydraulic valve connected in the fluid power system of jacking equipment or three-dimensional parking device etc., can make by hydraulic pressure Fluid is drastically supplied in source to hydraulic cylinder, so that jacking equipment or three-dimensional parking device start suddenly, and a side Face makes equipment easily produce noise, on the other hand extremely causes device damage, it is necessary to improved.

Summary of the invention

The present invention proposes a kind of hydraulic valve, solves drastically supply hydraulic fluid of the prior art and makes application The problem of device damage.

The technical scheme is that and be achieved in that:

A kind of hydraulic valve, the spool including valve casing, being movably arranged in this valve casing, the bullet being resisted against spool side Spring and be resisted against the end plug of spring side, has a runner linearly extended in described valve casing, this runner Two ends are the opening of through valve casing, an opening of this runner for being connected with hydraulic power source, another opening be used for Hydraulic cylinder connects, and is additionally provided with the accepting hole with runner vertical connection in this valve casing, and described spool is contained in In accepting hole, this spool includes a body and is located at a head of this body one end, in described body Form an accepting groove, described head be cross section be half elliptic half egg type, the top of this head supports Being against the inwall of runner, this head is provided with two fluid introduction hole, and head is located in one end of each fluid introduction hole On the arcwall face in portion, the other end converges at a bit on the centrage of head, and is connected with the accepting groove of spool, Between described head and runner inner wall, formation two is the seam of gradually-reducing shape to position, fluid introduction hole by hydraulic power source Gap, described spring is contained in the accepting groove of spool.

Preferred version is, described end plug screws togather to be located in accepting hole.

Preferred version is, the cross section of described accepting hole is circular, and the cross section of described runner is circular.

Preferred version is, described end plug is T-shaped, and it includes the butting section being contained in the accepting hole of valve casing And it is vertical with this butting section and be positioned at the location division outside valve casing.

Preferred version is, described location division is provided with a handle hole.

The invention have the benefit that

Hydraulic valve in the present invention, is entered in runner by the opening being connected with hydraulic power source by hydraulic fluid, enters The hydraulic fluid entered in runner is blocked by spool, is only flow through by the gap between the head of spool and runner again Connected hydraulic cylinder, meanwhile, a part of hydraulic fluid stream by spool is flowed to by another opening Body entrance hole enters in the accepting groove in spool, thus is drastically supplied fluid and make in preventing hydraulic cylinder Jacking equipment or three-dimensional parking device suddenly start and damage.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the sectional view of hydraulic valve of the present invention；

Fig. 2 is and the enlarged drawing of the spool part of hydraulic valve vertical angle in Fig. 1.

In figure:

100, hydraulic valve；10, valve casing；20, spool；30, spring；40, end plug；11, runner；12、 13, opening；15, accepting hole；21, body；23, head；22, accepting groove；25, fluid imports Hole；41, butting section；43, location division；45, handle hole；S, gap.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.

As it is shown in figure 1, this hydraulic valve 100 includes the spool that valve casing 10, activity are contained in this valve casing 10 20, it is resisted against the spring 30 in the outside of spool 20 and is resisted against the end plug 40 outside spring 30.

There is in described valve casing 10 runner 11 linearly extended.The cross section of this runner 11 is circular, And the opening 12,13 that its two ends are through valve casing 10.One opening 12 of this runner 11 for such as liquid such as pumps Potential source connects, and another opening 13 is for being connected with the hydraulic cylinder such as jacking equipment etc..In this valve casing 10 also It is provided with the accepting hole 15 with runner 11 vertical connection.The cross section of this accepting hole 15 is circular.

Described spool 20 is contained in accepting hole 15.This spool 20 includes a body 21 and is located at this One head 23 of body 21 one end.Described body 21 is cylindric, forms an accepting groove 22 in it.Please Simultaneously refering to Fig. 2, described head 23 is half egg type, and its cross section is half elliptic.This head 23 is Big external diameter is slightly less than the internal diameter of accepting groove 22.The top of described head 23 is resisted against the inwall of runner 11, This head 23 is provided with two fluid introduction hole 25, and the arc of head 23 is located in one end of each fluid introduction hole 25 On shape face, the other end converges at a bit on the centrage of head, and is connected with the accepting groove 22 of spool 20. Forming two between this head 23 and runner 11 inwall is gradually-reducing shape by hydraulic power source to position, fluid introduction hole 25 Gap S.

Described spring 30 is contained in the accepting groove 22 of spool 20, and is in compressive state, and its two ends are respectively It is resisted against one end and one end of end plug 40 of accepting groove 22.Described end plug 40 is contained in accepting hole 15 also It is resisted against the outer end of spring 30.This end plug 40 is T-shaped, it accepting hole 15 including being contained in valve casing 10 In butting section 41 and vertical with this butting section 41 and be positioned at the location division 43 outside valve casing 10.Described against The outer peripheral face in portion 41 is provided with external screw thread, and the inwall of this accepting hole 15 is in the butting section 41 of corresponding end plug 40 Position is provided with female thread.The butting section of this end plug 40 screws togather to be located in accepting hole 15, and makes inside it and bullet Spring 30 leans.This location division 43 is provided with a handle hole 45, by operating parts scalable such as screwdrivers End plug 40 moves in accepting hole 15.

During use, hydraulic fluid is entered in runner 11 by the opening 12 being connected with hydraulic power source, enters into runner Hydraulic fluid in 11 is blocked by spool 20, only passes through the gap between the head 23 of spool 20 and runner 11 S flows through and flows to connected hydraulic cylinder by another opening 13 again, and meanwhile, a part of hydraulic fluid leads to In the accepting groove 22 that the fluid introduction hole 25 crossing spool 20 enters in spool 20, thus prevent hydraulic air Drastically supplied fluid and make jacking equipment or three-dimensional parking device suddenly start and damage in cylinder.By operation Part regulation end plug 40 moves out in accepting hole 15, makes spring 30 reduce compression stress, due to this gap S It is gradually reduced to the head 23 of spool 20 by hydraulic power source, makes to act on the hydraulic coupling of the head 23 of spool 20 Hydraulic power source along runner 11 is gradually lowered, when acting on the head 23 of spool 20 hydraulic fluid in outside When hydraulic coupling is slightly larger than spring 30 pressure in spool 20, make spool 30 gradually draw back, i.e. gear is located at stream Part in road 11 is more and more less, until exiting completely to runner 11, so that flowing through in runner 11 Hydraulic fluid is incrementally increased, until reaching the demand and supply of required hydraulic flow.

When being embodied as, the structure of this hydraulic valve 100 is not limited to the case for this embodiment, and its head 23 can be Hemispherical, it is possible to for coniform, its fluid imports can be to be located at its head end one, it is possible to for rear end remittance That gathers together is multiple.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this Within bright protection domain.

Claims (5)

1. a hydraulic valve, it is characterised in that: include valve casing, the spool being movably arranged in this valve casing, against Spring in spool side and be resisted against the end plug of spring side, has one and linearly extends in described valve casing Runner, the two ends of this runner are the opening of through valve casing, and an opening of this runner is used for being connected with hydraulic power source, Another opening, for being connected with hydraulic cylinder, is additionally provided with the accepting hole with runner vertical connection in this valve casing, Described spool is contained in accepting hole, and this spool includes a body and is located at a head of this body one end, Form an accepting groove in described body, described head be cross section be half elliptic half egg type, this head The top in portion is resisted against the inwall of runner, and this head is provided with two fluid introduction hole, each fluid introduction hole One end be located on the arcwall face of head, the other end converges on the centrage of head a bit, and with spool Accepting groove is connected, and forms two by hydraulic power source to position, fluid introduction hole between described head and runner inner wall Gap in gradually-reducing shape, described spring is contained in the accepting groove of spool.

2. hydraulic valve as claimed in claim 1, it is characterised in that: described end plug screws togather to be located in accepting hole.

3. hydraulic valve as claimed in claim 1 or 2, it is characterised in that: the cross section of described accepting hole is Circle, the cross section of described runner is circular.

4. hydraulic valve as claimed in claim 1, it is characterised in that: described end plug is T-shaped, and it includes The butting section that is contained in the accepting hole of valve casing and vertical with this butting section and be positioned at the location division outside valve casing.

5. hydraulic valve as claimed in claim 4, it is characterised in that: described location division is provided with a handle hole.