CN2372515Y

CN2372515Y - Stop cock

Info

Publication number: CN2372515Y
Application number: CN 99201999
Authority: CN
Inventors: 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-01-12
Filing date: 1999-01-12
Publication date: 2000-04-05
Anticipated expiration: 2009-01-12

Abstract

The utility model relates to a valve, particularly a plug valve which is a novel valve combining the advantages of a plurality of kinds of valves together and having a mechanical seal device. The utility model is characterized in that the plug valve comprises a valve body, a valve core, a valve cover, a mechanical seal, a nut and a hand wheel, wherein, the valve core is composed of a core body, a screw rod and a positioning shaft; the valve core can rotate within from 0 DEG to 90 DEG in the valve body and move up and down; the sealing surfaces of the valve core and the valve body have a certain gap and have no abrasion in a switching process; a clutch device is arranged between the hand wheel and the valve core; when the hand wheel rotates, the nut and the valve core can be simultaneously driven to rotate, namely the value is opened and closed; the nut can be driven to rotate independently, the valve core is caused to move down to eliminate the gap of the sealing surfaces to achieve tight seal, or the valve core is caused to move upwards to generate the gap. The utility model relates to a plug valve which uses a unique structure to make the value have the advantages of reliable seal, long service life and no maintenance; the utility model is a novel valve design and can be widely used for systems of water, steam, oil, etc.

Description

A kind of stopcock

The utility model relates to a kind of valving, and especially a kind of to collect several valve advantages be one and a kind of stopcock that has mechanical seal device.

Existing valve can be divided into stop valve, ball valve, stopcock etc. according to the difference of structure, and they respectively have pluses and minuses, can not be complementary.A kind of stopcock of the utility model is the advantage of collection stop valve, ball valve, stopcock, promptly the switch of stop valve flexibly, ball valve resistance minimum, stopcock good airproof performance, be the valve of one.Provide a kind of a kind of valve that seals reliable, long service life, Maintenance free order of the present utility model.

Be achieved through the following technical solutions order of the present utility model, a kind of stopcock includes valve body, valve gap, mechanical seal, nut, handwheel, spool, its special way is that described spool includes core body, screw rod, the core body axle, core outer surface is a cone, the centre is the hole, core body two ends and screw rod, positioning shaft is connected as a single entity, core body is positioned at the middle garden of valve body taper hole, positioning shaft is arranged in the blind hole of taper hole lower end, the screw rod lower end is with seal arrangement, and valve gap is passed in the upper end, nut, and be with spring, cover in the handwheel, on the screw tip plane, valve gap is fastened on the valve body and with screw and fixes the handwheel gland by screw.Nut lower end pillow block is fixed in the hole of valve gap correspondence by bonnet nut, and can rotate flexibly, the upper end uniform plane has Baltimore groove, cover upper and lower end uniform plane has convex platform in the handwheel, the protruding dish platform in cover lower end combines with nut upper end groove in the handwheel, the upper end convex platform combines with groove on the handwheel gland cylindrical, and spring supports to overlap in the handwheel is close to the handwheel gland.Handwheel and gland have clutch function, rotate handwheel and can drive nut, spool rotation simultaneously, also can only drive the nut rotation, and spool moves up and down.In rotary course, i.e. switching process, valve core sealed cover is that outer garden of core body and valve body taper hole have certain interval.Therefore the switching process sealing surface does not have wearing and tearing, has prolonged valve working life.When spool forwards closed position to, make the disengaging of handwheel and spool be rotated further handwheel spool is moved down, eliminate the sealing surface gap, it is reliable to reach sealing.Mechanical seal device has motive sealing and static seal on the screw rod, and motive sealing is rotated under the effect of spring by plane on the stuffing box gland or moved up and down all and keeps tight with the gland lower plane all the time, and static seal tightly is enclosed within the outer garden of screw rod by stuffing box gland lower end pipe and finishes.The Baltimore groove of sleeve pipe lower end surface combines with convex platform on the core body, guarantees that stuffing box gland and spool rotate synchronously, and this mechanical seal Q-percentile life is long.

A kind of stopcock of the utility model adopts particular structure, makes valve seal Q-percentile life long, and do not have and safeguard, be a kind of brand-new valve design.

Description of drawings is as follows:

Fig. 1: the utility model most preferred embodiment sectional view.

Provide the utility model most preferred embodiment below in conjunction with accompanying drawing and be used for further specifying the utility model, Fig. 1 is the sectional view of a kind of stopcock of the utility model most preferred embodiment, include valve body (1), valve gap (2), spool, nut (8), handwheel (11), spool comprises core body (5), positioning shaft (4), screw rod (6), core body (5) cylindrical is that cone cooperates with valve body (1) taper hole, the centre is the hole, screw rod (6) lower end is with mechanical seal device (14), valve gap (2) is buckled in valve body (1) and goes up and fix with screw, locating stud (7) is fixed on the screw rod (6), can supply screw rod (6) to rotate the inner chamber of 0-90 ° of scope in the middle of being positioned at valve gap (2) upper end, nut (8) cooperates with screw rod (6), lower end cylindrical step is fixed in the corresponding hole of valve gap (2) by bonnet nut (3), and can rotate flexibly, nut (8) is gone up Transverse plane and is had Baltimore groove, combines with cover (12) lower end convex platform in the handwheel.Cover (12) upper end convex platform combines with the groove of handwheel gland (10) in the handwheel.Handwheel (11) is enclosed within screw rod top and screw rod for movingly, spring (9) is positioned at handwheel cover (12) lower end, under the effect of spring (9), handwheel gland (10) is close in cover (12) upper end in the handwheel, and handwheel gland (10) is fixed on screw tip by screw (13) (15).

When valve is positioned at fully open position, core body (5) center hole and valve body (1) manhole appendix UNICOM, core body (5) cylindrical and valve body (1) taper hole have certain interval.Locating stud (7) is positioned at 0 ° of position.Handwheel gland (10) is a closed state with the interior cover of handwheel (12).When valve need be closed, rotation handwheel (11) drove nut (8), spool rotates synchronously, and when forwarding 90 ° to, because the effect spool of locating stud can not change again, this moment, core body (5) center hole and valve body (1) manhole appendix were closed.Because core body (5) does not seal with gapped the reaching fully of valve body (1) taper hole, handwheel (11) pushed inward make that cover (12) breaks away from handwheel gland (10) in the handwheel, be rotated further handwheel and drive nut (8) with changeing, spool will move down elimination core body (5) and reach sealing with valve body (1) taper hole gap.Backward rotation handwheel (11) and drive nut (8) during unlatching with changeing in the handwheel this moment cover (12) and handwheel gland (10) still in separated state, spool will on move, core body (5) gap occurs with valve body (1) taper hole, in the handwheel cover (12) under the effect of spring (9) with handwheel gland (10) closure, handwheel (11) drive nut (8), spool continue to rotate to 90 ° of fully open positions.The sealing of screw rod (6) output terminal is finished by mechanical seal device (14), mechanical seal device has motive sealing and static seal, motive sealing is rotated to move up and down under the effect of spring by Transverse plane on the stuffing box gland and all is close to valve gap (2) to reach sealing tight, static seal tightly is enclosed within by stuffing box gland lower end sleeve pipe and finishes on screw rod (6) cylindrical, the sleeve pipe lower end has Baltimore groove and combines with the convex platform of core body upper end, guarantees that stuffing box gland rotates synchronously with spool.

A kind of stopcock of the utility model can be widely used in water, vapour, wet goods system.

Claims

1, a kind of stopcock, include valve body (1), valve gap (2), mechanical seal device (14), nut (8), handwheel (11), spool, it is characterized in that described spool is by core body (5), positioning shaft (4), screw rod (6) is formed, core body (5) outer surface is a cone, the centre is the hole, two ends respectively with screw rod (6), positioning shaft (4) is connected as a single entity, core body (5) is positioned at the middle taper hole of valve body (1), positioning shaft (4) is arranged in the blind hole of taper hole lower end, locating stud (7) lower end is housed on the screw rod (6) is with mechanical seal device (14), valve gap (2) center is passed in the upper end, nut (8), and be with spring (9), cover (12) in the handwheel, handwheel gland (10) is fixed on screw rod (6) plane, top by screw (15) (13), and valve gap (2) is buckled on the valve body (1), and fixes with screw.

2, a kind of stopcock according to claim 1, it is characterized in that mechanical seal device (14) is made up of stuffing box gland and spring, the upper end of stuffing box gland is a ring, the lower end is the cylindrical sleeve that evenly has Baltimore groove on the bottom plane, the centre is undulatory sleeve pipe, and stuffing box gland lower end Baltimore groove combines with the convex platform that core body (5) is gone up Transverse plane.Spring housing is in the stuffing box gland outside, and Transverse plane is close to stuffing box gland on the spring, and upper end circular ring lower plane, following Transverse plane are close to core body (5) and are gone up Transverse plane.

3, a kind of stopcock according to claim 1 is characterized in that locating stud (7) is fixed on the screw rod (6), places the middle locating stud that can supply in valve gap (2) upper-end surface to rotate in the cavity of 0-90 ° of scope.

4, a kind of stopcock according to claim 1 is characterized in that nut (8) cylindrical is step-like, and the lower end pillow block places in valve gap (2) corresponding aperture fixing by bonnet nut (3), and nut (8) can rotate in the hole flexibly, and the upper end uniform plane is provided with Baltimore groove.

5, a kind of stopcock according to claim 1, it is characterized in that cover (12) upper and lower end uniform plane is provided with convex platform in the handwheel, lower end plane convex domain platform is gone up the Transverse plane Baltimore groove with nut (8) and is combined, and upper end plane convex domain platform combines with the groove that is provided with in wheel gland (10) cylindrical.

6, a kind of stopcock according to claim 1 is characterized in that spring (9) is enclosed within on the screw rod (6), and following Transverse plane is close to the end face of screw flight, and last Transverse plane is close to the lower plane of cover (12) in the handwheel.

7, a kind of stopcock according to claim 1 is characterized in that hand lid (10) cylindrical is provided with uniform groove, and the centre is a circular hole, and screw (15) (13) is equipped with on last plane, and is fixed on screw rod (6) plane, top.