CN2293690Y

CN2293690Y - Hydraulic opening & closing device for valve

Info

Publication number: CN2293690Y
Application number: CN 97211269
Authority: CN
Inventors: 梁佩生
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-13
Filing date: 1997-03-13
Publication date: 1998-10-07
Anticipated expiration: 2007-03-13

Abstract

The utility model discloses a hydraulic opening and closing device for valves, which belongs to the field of poppet valves. The utility model comprises a valve body, a cylinder body, and a cylinder cover, wherein, the valve body is a three-way valve; A opening, B opening, C cavity, and D cavity are communicated with a four-way valve through guiding tubes. The four-way valve comprises a casing body, valve sleeves, valve cores, end covers, and handles. The four-way valve is used for controlling a main valve by the utility model, and the opening and closing of the valve is completed by that the pressure of fluid is used for driving pistons to move. The utility model can replace electrically-operated devices such as expensive complicated reduction gears, etc. The utility model can realize automatic operation, or isolated operation, or linkage self controlling operation and is suitable for the valves having large caliber and high pressure and places having fire prevention requirements.

Description

A kind of valve hydraulic opening-closing device

The utility model belongs to the poppet valve field, particularly a kind of valve hydraulic opening-closing device.

The keying of the valve that existing valve, particularly bore are big, pressure is high all need be disposed reduction gear, Electric actuator etc., complex structure, the cost height, dumb, imprecision, and when work produce metal bump, be unsuitable for fire prevention, explosion-proof environment.The Chinese patent specification has been announced a kind of normal-pressure boiler special valve (patent No. 95232571.3), and this product has been avoided above-mentioned situation in operation, and can finish automatic on-off, but only is applicable to low pressure, the use of small atmospheric boiler water circulation system.

The purpose of this utility model is finished the device of valve opening and closing with regard to providing a kind of pressure by fluid.

The purpose of this utility model is achieved in that a kind of valve hydraulic opening-closing device, comprise valve body, cylinder body, cylinder cap, valve body is a three-way valve, be provided with valve gap between its inlet A mouth and the outlet B mouth, valve gap is connected with piston by pull bar, piston moves in cylinder body, cylinder cap is installed in the cylinder body upper end, the cylinder body lower end connects cylinder bottom, be provided with control chamber C between piston and the cylinder cap and spring is housed, control chamber D is set between piston and the cylinder bottom, it is characterized in that: at the A mouth, the B mouth, the C chamber, be respectively equipped with pipe joint on the wall of chamber, D chamber, and communicate with four-way valve by conduit, four-way valve comprises housing, valve pocket, spool, end cap, handle, valve pocket is fixed in the housing by end cap, and valve pocket is along having three holes on the peripheral wall and communicating with three liquid outlets of housing respectively, spool is a cylindrical body, have three grooves on it, the spool head is provided with the gas pressure relief slot at 90 ° at turning, and the middle part is provided with the direct through groove with axis normal, afterbody is provided with the intake chute at 90 ° at turning, spool rearward end fixed handle.

Advantage of the present utility model is: main valve is to utilize fluid in the pressure difference of import with outlet, promote long or decline on the piston in hydraulic cylinder, the press liquid that has that D chamber with four-way valve (pilot valve) control main valve imports, (or the C chamber imports, D chamber derive) derived in the C chamber, drive spool, valve gap rising or decline, finish the valve opening and closing action, thereby be specially adapted to the valve of heavy caliber, high pressure, the Electric actuators such as reduction gear that can replace costliness, complexity can be realized automatic work, isolated operation or interlock automatic operation simultaneously.Because metal friction, collision have been avoided in operating process, are particularly suitable for having the place of fire safety requirement.

Fig. 1 is the utility model structural representation.

Fig. 2 is the four-way valve structural representation.

Fig. 3 is a four-way valve A-A sectional view.

Fig. 4 is the valve pocket structural representation.

Fig. 5 is the valve core structure schematic representation.

Fig. 6 is a spool B-B sectional view.

Fig. 7 is a spool C-C sectional view.

Fig. 8 is a spool D-D sectional view.

Below in conjunction with accompanying drawing the utility model is described further.

The utility model comprises valve body 1, cylinder body 7, cylinder cap 8, valve body 1 is a three-way valve, be provided with valve gap 3 between its inlet A mouth and the outlet B mouth, valve gap 3 is connected with piston 6 by pull bar 4, piston 6 moves in cylinder body 7, cylinder cap 8 is installed in cylinder body 7 upper ends, cylinder body 7 lower ends connect cylinder bottom 5, be provided with control chamber C between piston 6 and the cylinder cap 8 and be provided with spring 12, between piston 6 and the cylinder bottom 5 control chamber D is set, at the A mouth, the B mouth, the C chamber, be respectively equipped with pipe joint on the wall of chamber, D chamber, and communicate with four-way valve 14 by conduit, four-way valve 14 comprises housing 16, valve pocket 17, spool 18, end cap 19, handle 20, valve pocket 17 is fixed in the housing 16 by end cap 19, valve pocket 17 (is seen Fig. 3 along having three holes 22 on the peripheral wall and communicating with three liquid outlets 21 of housing 16 respectively, Fig. 4), spool 18 is a cylindrical body, have three groove (see figure 5)s on it, spool 18 heads are provided with gas pressure relief slot 23 (see figure 6)s at 90 ° at turning, the middle part is provided with direct through groove 24 (see figure 7)s with axis normal, afterbody is provided with intake chute 25 (see figure 8)s at 90 ° at turning, spool 18 rearward end fixed handles 20.During work, fluid enters the A mouth, and a part enters four-way valve 14 through conduit I15, and when the handle 20 of four-way valve 14 during in a position, fluid enters oil hydraulic cylinder D chamber through conduit II13, promotes piston 6 and rises, and drives valve gaps 3 by pull bar 4 simultaneously and rises valve opening.This moment, oil hydraulic cylinder C chamber inner fluid flowed to four-way valve 14 through conduit III11, and four-way valve 14 imports conduit IV2 with it, flowed into outlet B mouth.When the handle 20 of four-way valve 14 during in the b position, fluid is imported into conduit III11 through conduit I15, promotes piston 6 and descends, and drives valve gaps 3 by pull bar 4 simultaneously and descends valve closing.This moment, the fluid in oil hydraulic cylinder D chamber flowed into four-way valve 14 through conduit II13, and fluid also flows into outlet B mouth by four-way valve 14 through conduit IV2.The size of valve opening and closing power is directly proportional with the product of the quadratic sum pressure of bore, when the pressure difference of A mouth, B mouth too hour, can pass through pressure governor 9 and spring 12 boost pressures, to guarantee the enough power of closing that rises.The flow of main valve (resistance) is manually set by centering bolt 10.Be in operation, spring 12 can have the effect of fine setting balance with the variation of pressure.

Claims

1. valve hydraulic opening-closing device, comprise valve body (1), cylinder body (7), cylinder cap (8), valve body (1) is a three-way valve, be provided with valve gap (3) between its inlet A mouth and the outlet B mouth, valve gap (3) is connected with piston (6) by pull bar (4), piston (6) moves in cylinder body (7), cylinder cap (8) is installed in cylinder body (7) upper end, cylinder body (7) lower end connects cylinder bottom (5), be provided with control chamber C and spring (12) is housed between piston (6) and the cylinder cap (8), between piston (6) and the cylinder bottom (5) control chamber D is set, it is characterized in that: at the A mouth, the B mouth, the C chamber, be respectively equipped with pipe joint on the wall of chamber, D chamber, and communicate with four-way valve (14) by conduit, four-way valve (14) comprises housing (16), valve pocket (17), spool (18), end cap (19), handle (20), valve pocket (17) is fixed in the housing (16) by end cap (19), valve pocket (17) is along having three holes (22) on the peripheral wall and communicating with three liquid outlets (21) of housing (16) respectively, spool (18) is a cylindrical body, have three grooves on it, spool (18) head is provided with the gas pressure relief slot (23) at 90 ° at turning, the middle part is provided with the direct through groove (24) with axis normal, afterbody is provided with the intake chute (25) at 90 ° at turning, spool rearward end fixed handle (20).