CN2115422U

CN2115422U - Hydraulic superhigh pressure three-position four-way valve

Info

Publication number: CN2115422U
Application number: CN 91231874
Authority: CN
Inventors: 魏可飞
Original assignee: DEZHOU HYDRAULIC IMPLEMENTS FACTORY
Current assignee: DEZHOU HYDRAULIC IMPLEMENTS FACTORY
Priority date: 1991-12-21
Filing date: 1991-12-21
Publication date: 1992-09-09

Abstract

The utility model provides a three-position four-way valve which is applicable to the working communicating of a hydraulic system. The rated pressure of the three-position four-way valve which is applicable to the working communicating of a hydraulic system is 40-100 MPa, and the through diameter of the three-position four-way valve which is applicable to the working communicating of a hydraulic system is 4-10 mm. The hydraulic pressure commutation function of the three-position four-way valve which is applicable to the working communicating of a hydraulic system is realized by that a pressing disk with a plane cam is rotated, and the opening and closing of four ball valves are simultaneously controlled. The utility model has the advantages of compact structure and simple operation. Various slide valve functions of the three-position four-way valve which is applicable to the working communicating of a hydraulic system can be realized by changing the shape of the surface of the cam of the pressing disk. The utility model provides an ideal communicating for a hydraulic system, in particular to a superhigh pressure hydraulic system whose pressure is greater than 40 MPa.

Description

Hydraulic superhigh pressure three-position four-way valve

The utility model relates to a kind of improved hydraulic pressure three position four-way directional control valve, is specially adapted to the hydraulic pressure extra high voltage system of pressure greater than 40mpa.

Three position four-way directional control valve commonly used belongs to slide-valve structure more, and this valve internal leakage is bigger, and the difficulty that often commutates owing to pressure is high, therefore can not be used for the extra high voltage system of pressure greater than 40mpa.Mostly three position four-way directional control valve in the extra high voltage system is to combine by many valves at present, this combined directional valve, increased control mechanism, particularly make up hand-operated direction valve, increased Joystick, not only operation inconvenience has also increased the possibility of misoperation, strengthened physical dimension simultaneously, rate of breakdown is also higher.

The purpose of this utility model is exactly that a kind of improved three position four-way directional control valve that is specially adapted to the ultrahigh-pressure hydraulic occasion will be provided.Because this valve has reasonably utilized the one combination of four ball valves and realized logic control, not only do not have internal leakage, and volume is little, it is reliable, easy and simple to handle to commutate.

Task of the present utility model realizes as follows: have four identical cylindrical valve openings on valve body, and be interconnected, screw plug all is housed respectively in valve opening from the bottom to top, packing ring, spring, bearing, steel ball, valve pocket, guide pin bushing, push rod, " zero " RunddichtringO, ring washer, sealing guide pin bushing, sealing gland, compress spiral shell, steel ball, on valve body, have two balance oil circuits, guide pressure oil into epicoele that guide pin bushing, sealing guide pin bushing and push rod are formed, balance part to the push rod hydraulic coupling of effect upwards, the steering force when having reduced commutation.On valve body, be equipped with can two-way rotation platen, platen is pressed on the steel ball, the platen face that contacts with steel ball is processed to form face cam, so, when rotating platen, the promotion push rod that cam is indirect opens or closes the ball valve in the valve body, thereby changes the commutation control of liquid flow path direction realization system works in the valve.Because platen can form the face cam of different operating curve,, can obtain the selector valve of multiple meta function again so change platen.

The utility model is compared with prior art let out in the nothing, the inconvenience of having avoided many valve combinations to bring, and same valve body can realize multiple function, owing to have the balance oil circuit in the valve, the steering force when having reduced commutation, characteristics such as it is reliable and stable to have commutation, and rapid operation, easy, life-span are long.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is the novel external form figure of this use

Fig. 2 is that Fig. 1 shows the B-B sectional view

Fig. 3 is that Fig. 2 shows the A-A sectional view

Fig. 4 is that Fig. 1 shows the C-C sectional view

Fig. 5 is that Fig. 1 shows the D-D sectional view

Fig. 6, Fig. 7, Fig. 8, Fig. 9 are respectively this platen face cam schematic representation that uses novel meta H, O, P, y-function.

With reference to Fig. 3, ［ 1 ］ valve body, ［ 2 ］ screw plug, ［ 3 ］ packing ring, ［ 4 ］ spring, ［ 5 ］ bearing, ［ 6 ］ steel ball I, ［ 7 ］ valve pocket, ［ 8 ］ guide pin bushing, ［ 9 ］ push rod, ［ 10 ］ " O " RunddichtringO, ［ 11 ］ back-up ring, ［ 12 ］ sealing guide pin bushing, ［ 13 ］ sealing gland, ［ 14 ］ compress spiral shell, ［ 15 ］ steel ball II, ［ 16 ］ platen, ［ 17 ］ platen face cam, ［ 18 ］ balance oil circuit.

Have four valve openings on steel (following each part does not have to specify the to be steel) valve body ［ 1 ］, screw plug ［ 2 ］ and packing ring ［ 3 ］ are used to seal the valve opening lower end, on screw plug, have cylindrical hole and place spring ［ 4 ］, it has supporting effect to steel ball I ［ 6 ］, under spring action, steel ball upwards is pressed on the valve pocket ［ 7 ］ all the time, or, is pressed on the push rod when push rod ［ 9 ］ when depressing steel ball.Spring, steel ball, valve pocket, push rod constitute a ball valve that can open or close jointly.Valve pocket and guide pin bushing ［ 8 ］ and valve opening interference fit have two square oily windows in the lower end of guide pin bushing, make fluid window inflow from then on or outflow by ball valve, and it play the guiding role again to guide rod simultaneously.Sealing guide pin bushing ［ 12 ］ and valve body interference fit, and and formation hydro-cushion pressure chamber between the guide pin bushing ［ 8 ］, communicate with the lower end by balance oil circuit ［ 18 ］, make the hydraulic coupling at this place identical with end pressure under the steel ball all the time, balance the upwards active force of part hydraulic coupling to guide rod, thereby reduced the strength that guide rod is opened one-way valve, also reduced switch operation power.Sealing gland ［ 13 ］ is pressed on the sealing guide pin bushing, and the rubber system between the two " O " shape seal ring ［ 10 ］ and nylon ring washer ［ 11 ］ and other two groups of seal rings all seal.Compress spiral shell ［ 14 ］ and the part in the valve body of packing into is risen compress and positioning action, the steel ball II ［ 15 ］ in it of fixedly packing into simultaneously, steel ball is used for reducing the frictional force of rotating platen ［ 16 ］.Be connected on the valve body by screw ［ 21 ］ with reference to Fig. 5, platen, rubber system overcoat ［ 19 ］ plays dustproof effect, bearing ［ 20 ］ is used to reduce the frictional force of rotating platen, screw ［ 22 ］ fixed jacket ［ 19 ］, and ［ 23 ］ are operating grip, ［ 24 ］ fastening screw trip bolt, ［ 25 ］ be the platen locating stud, when rotating platen, the face cam on the platen ［ 17 ］ is by four ball valves of guide rod logic control, make steel ball open or open and close valve port, thereby realize that liquid stream commutates in valve.

Above-mentioned logic control is following realization: with reference to figure ［ 6 ］ is H type meta function platen, when platen mediates, steel ball on four valve ports promotes to leave valve pocket by push rod, so hydraulic fluid port P, A, B, the T intercommunication, be H type meta function, when platen changes 30 ° of angles clockwise or counterclockwise, the one group of ball valve that is the diagonal angle distribution in the valve body is in equal state, or open or close, the fluid that is entered by the P mouth will be controlled by A(B by ball valve like this) flow out, by actuator again by B(A) enter in the valve and flow out by the T mouth, all the other function working principles are similar.

Claims

1, a kind of hydraulic pressure ultrahigh pressure three position four-way directional control valve, the particularly device of being made up of valve body [1] platen [16] is characterized in that:

Have 4 identical cylindrical valve openings on a, the described valve body [1],

Screw plug [2], spring [4], bearing [5], steel ball I [6], valve pocket [7], guide pin bushing [8], push rod [9], " O " shape seal ring [10], sealing guide pin bushing [12], sealing gland [13] all are housed respectively in the valve opening of b, described valve body from the bottom to top, compress spiral shell [14], steel ball II [15]

Have balance oil circuit [18] on C, the described valve body [1],

The rotary platen [16] that presses steel ball II [15] is housed on D, the described valve body [1].

2, device according to claim 1, what it is characterized in that platen ［ 16 ］ has the meta function that changes valve can be processed into difform face cam ［ 17 ］.

3, device according to claim 1 and 2, when it is characterized in that rotating platen, the face cam on the platen ［ 17 ］ promotes push rod ［ 9 ］, and push rod opens or closes the ball valve in the valve body.