CN2044026U

CN2044026U - Closed plunger valve

Info

Publication number: CN2044026U
Application number: CN 88217735
Authority: CN
Inventors: 潘金荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-11-30
Filing date: 1988-11-30
Publication date: 1989-09-06

Abstract

The utility model relates to the improvement of a general engineering component-valve. A closed plunger valve is provided with a fluid (gas) pressure cylinder in which a piston which can horizontally rotate to a fixed angle is arranged; the piston drives a valve core to rotate by an inserted valve stem with two rectangular ends; the cylinder body is fixedly connected to a valve cover or a valve body; the totally enclosed structure of the value is achieved. The valve core is formed by a cylindrical valve core and a valve core sleeve whose inside forms a cylindric shape and whose outside forms a cone shape; two vertical grooves are arranged on the external wall of the valve core sleeve; the valve core sleeve is fixed on valve body; the up and down positions of the valve core sleeve are regulated to cause the grooves to generate micro deformation; a favorable encapsulated situation of the valve core is achieved.

Description

Closed plunger valve

The utility model has related to general engineering part---the improvement of valve.

The kind of valve is a lot, uses also very wide.Along with industry and development of science and technology, more and more higher to the requirement of the leak-proof and automatic control of valve.Generally in various degree problem that has internal and outernal leakage all such as the gate valve of Shi Yonging, ball valve, stopcock, telescoping valve is especially being used after a period of time, and the sealing face leakage meeting of spool and valve rod is more serious.For reducing interior leakage, but the circular cone of fast opening and closing valve commonly used or spherical valve core will be worked into higher precision, and this processing of the giving spool especially processing of valve body sealing surface brings bigger difficulty.External leakage problem though the bellow type full-closed structure is a solution preferably, because the present withstand voltage degree of bellows enclosed construction is limited, has limited using scope.Also valve rod can not directly link with drive unit in order to rotatablely move owing to the output movement of drive unit is normal, must in the middle of drive unit and bellows enclosed construction switching mechanism be set, otherwise will reverse or damage bellows element.

The purpose of this utility model is to provide a kind of Self controlling valve that can better address the leakage concern.The characteristics of this valve are: (1) has the full-closed structure that withstand voltage degree is much higher than the bellows closure member, can solve the external leakage problem of valve effectively.(2) have that processing is simple, convenient, the valve core structure of good sealing effect, can solve the internal leakage problem of valve effectively.

Spool of the present utility model partly adopts cylindrical spool and conical valve core retainer plate with runner to combine, the sealing surface of spool and core retainer plate is precision machined cylndrical surface, has good sealing, because it is convenient that cylindrical spool and interior surface of contact are all columniform valve core housing fine finishing, and the outer contacting face is conical valve core housing is that adjustment by sealing medium and mounting point is fixed on the valve body, the surface of contact processing request is not high between valve core housing and valve body, thereby has simplified course of working.For reaching comparatively ideal seal request, be respectively to have designed a vertical groove on 90 ° the outer wall at the angle of valve core housing both sides and runner position, valve core housing is packed into behind the valve body, in case when the taper core retainer plate is applied downward pressure, groove will produce small deformation, utilize the compensating action of groove deformation, can regulate the gap of surface of contact in cylindrical spool and the valve core housing by the upper-lower position of adjusting core retainer plate, to reach good sealing state.Valve rod has adopted pin formula connecting structure, the valve rod two ends are designed to polygonal or rectangular cylinder, be inserted in the polygonal reserved on the spool or the rectangle jack during installation respectively and in the polygonal or rectangle axis hole of the piston mandrel lower end of control valve switch, owing to have certain slit between hole and pin, can adjust the center automatically, avoid the unilateral thrust that when being subjected to material pressure, produces when spool valve rod.The utility model has adopted a driving mechanism for switch that can be fixed on the valve body.Piston mandrel and attachment bolt, pistons stops and piston ring, upper end cap, lower end cap, sealing material and top seal bolt that this device all leaves polygonal or rectangular opening by piston cylinder cylinder body, the rotary-piston that can turn an angle as required, top and the bottom with fluid turnover runner are formed.The centre of piston cylinder is the piston mandrel that links with valve rod, and mandrel is fixed in the cylinder body and by fixing bolt and rotary-piston by upper and lower end cap and connects, and a semicircle or fan-shaped pistons stops are arranged in the piston cylinder.During work, liquid, gas or other fluid enter the piston cylinder cylinder body, rotate because hydrodynamic pressure promotes rotary-piston, drive valve core rotation, thereby play the open and close valve effect by piston mandrel, valve rod.The advantage of this device is: the piston cylinder cylinder body itself is a closure member, drive unit and valve are organically integrated, rotatablely moving of piston can not influence enclosed construction, cylinder body can play the effect of full-closed structure, has so just solved the external leakage problem of valve well.Another advantage is: cylinder body can directly be fixed on valve body, has so just saved the valve gap of common valve and the packing seal structure at valve rod place, and valve rod at this moment can be a polygonal or rectangular cylinder.Operational torque when reducing switch valve has been installed a bearing in the spool bottom.In addition, be easy-to-operat, be provided with a blind bolt, remove the manual jack of polygonal rectangle that bolt promptly exposes piston mandrel top, can use the hand switch valve like this at the upper end cap middle part at piston cylinder top.

Below be the utility model one embodiment, structure is seen accompanying drawing.

Fig. 1 is the column valve sectional view and dwindles 1 times A-A sectional view.Fig. 2 is the plan view and the A-A sectional view of valve core housing 2 in the column valve sectional view shown in Figure 1.Fig. 3 is the plan view and the A-A sectional view of spool 4 in the column valve sectional view shown in Figure 1.

Among Fig. 1, being fixed on the valve gap 5 is rotary piston cylinder, and there is the aperture for working liquid body or gas turnover cylinder body 14 both sides, and aperture has screw thread, can connect hydraulic pressure or pneumatic tube.Cylinder body 14 tops are upper end cap 16 and hexagonal blind bolt 12.

A fixing valve core housing 2 that turnover runner hole is arranged is equipped with in valve body 1 inside, core retainer plate 2 outer contacting faces are conical, respectively there is a vertical groove (see figure 2) both sides on the outer wall, groove location becomes 90 ° of angles with runner hole opening direction, screws in the tapped hole of ear stud when having two to supply dismounting valve core housing 2 on core retainer plate 2 walls.The interior surface of contact of core retainer plate 2 is cylindrical, but interior cover has the cylindrical spool 4 of in-line runner and left rotation and right rotation, and plane rolling bearing 3 is equipped with in spool 4 bottoms.Screw in the tapped hole of ear stud when Transverse plane has two to supply dismounting spool 4 on the spool 4.Leave square opening in recessed the part on spool 4 tops, can insert valve rod 6, valve rod 6 is cylindrical bodys that squarely is done at two, and two can be inserted in respectively in the square opening of spool 4 and the reservation of rotary-piston core mandrel 11 lower ends during installation.The step hole in the middle of the valve gap 5 is passed at the middle part of valve rod 6, and the reduced diameter section of valve rod 6 and step hole is equipped with stuffing box packing 7, and compresses by Gland 8 movingly between the enlarged diameter section of valve rod 6 and step hole.The mechanism on valve gap 5 tops is a drive unit---liquid (gas) is pressed rotary piston cylinder, cylinder body 14 is fixed on the valve gap 5 with flange connection form, cylinder body 14 inner 1/2 places are circle structures that a circle protrudes, the face that the runner that working fluid is arranged in the circle structure, annulus make progress has two runner holes that are communicated with the working room.Piston mandrel 11 is one and has the cylindrical of large and small diameter section, the upper end is an enlarged diameter section, the lower end is a reduced diameter section, the middle holder shoulder that forms, the diameter of reduced diameter section is identical with the annulus aperture, and mandrel 11 bottoms can be inserted in the annulus hole, and annulus is by holder shoulder supporting mandrel 11, the connecting part of the face that the cylndrical surface of mandrel 11 lower ends and annulus are downward enters the working room with rubber seal 10 and lower end cap 9 sealings to prevent material.Mandrel 11 upper end cylindrical bodys and cylinder body 14 upper body constitute the working room of rotary-piston 18, there are the rotary-piston block 13 of one 1/2 circle and the rotary-piston 18 of 1/4 ring in the working room, in it, the diameter of external arc equates respectively, it is semicircular groove that the cross section is all arranged on the left and right sides end face of block 13 and piston 18, block 13 and piston 18 arbitrary ends near the time, two grooves form a cylindrical cavity, cavity bottom is that the bottom of block 13 two ends semi-circular recesses is runner manhole appendixs, the radius of the circular arc of the radius ratio groove in hole is little, the center of circle of circular hole and the groove circular arc center of circle are same point, and working fluid can pass through runner, groove enters the pistons work chamber.Two hexagon socket head cap screws 20 of block 13 usefulness are fixed on the cylinder body 14, piston 18 is fixedly connected by two hexagon socket head cap screws 19 and mandrel 11, under the effect of working fluid pressure, but 90 ° of angles of piston left rotation and right rotation, and the working room is by rubber seal 15 and upper end cap 16 sealings.Upper end cap 16 middle parts are the bigger tapped holes of manually-operable jack than mandrel 11 tops, can screw in hex head bolt 12 sealings, when needing to use manually-operable, as long as remove bolt, just can utilize hand-operated tools to operate.

Claims

1, a kind of moving valve of being made up of valve body, spool, valve rod, valve gap and driving mechanism for switch of sealed mode liquid (gas) is characterized in that:

A fixing valve core housing 2 that turnover runner hole is arranged is equipped with in valve body 1 inside, core retainer plate 2 outer contacting faces are conical, respectively there is a vertical groove both sides on the outer wall, and groove location becomes 90 ° of angles with runner hole opening direction, screw in the tapped hole of ear stud when having two to supply dismounting valve core housing 2 on core retainer plate 2 walls.The interior surface of contact of core retainer plate 2 is cylindrical, but interior cover has the cylindrical spool 4 of runner and left rotation and right rotation, and bearing 3 is equipped with in spool 4 bottoms.Screw in the tapped hole of ear stud when Transverse plane has two to supply dismounting spool 4 on the spool 4.On spool 4 top recessed middle part and the rotary-piston core mandrel 11 lower ends polygonal hole that can insert valve rod 6 respectively partly, valve rod 6 is that two is polygonal cylinder.The step hole that valve gap 5 middle parts have a valve rod 6 to penetrate, the reduced diameter section of valve rod 6 and step hole is equipped with stuffing box packing 7, and compresses with Gland 8 movingly between the enlarged diameter section of valve rod 6 and step hole.The mechanism on valve gap 5 tops is that drive unit-liquid (gas) is pressed rotary piston cylinder, cylinder body 14 is fixed on the valve gap 5 with flange connection form, cylinder body 14 inner 1/2 places are circle structures that a circle protrudes, the face that the runner that working fluid is arranged in the circle structure, annulus make progress has two runner holes that are communicated with the working room.Piston mandrel 11 is have large and small diameter section cylindrical, and mandrel 11 lower ends are for can insert the reduced diameter section in annulus hole, and its diameter is identical with aperture, annulus hole.The connecting part of the face that the cylndrical surface of mandrel 11 lower ends and annulus are downward seals with rubber seal 10 and lower end cap 9.Mandrel 11 upper end cylindrical bodys and cylinder body 14 upper body constitute the working room of rotary-piston 18, a semicircle or fan-shaped rotary-piston block 13 and the rotary-piston 18 of 1/4 ring are arranged in the working room, the diameter of its inside and outside circular arc equates respectively, it is semicircular groove that the cross section is all arranged on the left and right sides end face of block 13 and piston 18, the bottom of block 13 two ends semi-circular recesses (circle structure of cylinder body 14 inside to face) is the runner manhole appendix, the radius of the circular arc of the radius ratio groove in hole is little, and the center of circle of circular hole and the groove circular arc center of circle are same point.Block 13 is fixed on the cylinder body 14 by attachment bolt 20, piston 18 is fixedly connected on mandrel 11 by attachment bolt 19, the working room is by rubber seal 15 and upper end cap 16 sealings, and upper end cap 16 middle parts are tapped holes of a screwed in blind bolt 12 more bigger than the manual jack of mandrel 11.

2, valve as claimed in claim 1 is characterized in that: do not have valve gap 5 between valve body 1 and the piston cylinder cylinder body 14, cylinder body 14 directly is connected on the valve body 1.