CN201218331Y

CN201218331Y - Axially elastically sealing ball valve with conveniently replaced ball core and sealing ring

Info

Publication number: CN201218331Y
Application number: CNU200820095169XU
Authority: CN
Inventors: 周重光; 伍正辉; 周现华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-04-08
Anticipated expiration: 2018-07-04

Abstract

The utility model relates to an axially-sealed ball valve with a conveniently removed and replaced ball core and a conveniently removed and replaced sealing ring. A piston is arranged in an axial through hole of a valve body of the ball valve, and can move axially. The sealing ring is arranged on one end of the piston, and the other end of the piston is provided with a spring which stays in the compressive state, and the elastic force of the spring seals the sealing ring and the ball core. A hole is radially arranged on the valve body, and the sealing ring and the ball core can be assembled in the valve body from the radial hole above the valve body. The service life of the ball valve is greatly prolonged, at the same time, because of the simple structure, the ball valve facilitates the removal and the replacement of the ball core and the sealing ring, is convenient to be maintained, brings convenience to users, saves energy, is environment-friendly, and reduces the waste.

Description

Axial elasticity seals and conveniently replaces the ball valve of ball core and seal ring

Affiliated technical field

The utility model relates to a kind of ball valve of axial elasticity sealing.Especially ball valve damages when out of control, block fluid after, can conveniently replace ball core and seal ring, repair rapidly, recover to use.

Background technique

At present, various ball valves all adopt axial stiffness sealing, and are easy to wear between ball core and the seal ring, again less than compensation, easily cause poorly sealed and leak; After the wearing and tearing, the friction between ball core and the seal ring is increasing, and the groove that cooperates with valve rod on the ball core is often twisted by valve rod and turned over owing to too shallow, and it is ineffective to cause valve rod control ball core to rotate, and causes the ball core can not close fully and leak at last.Just can repair though replace ball core and seal ring, replace extremely inconveniently, not have standby new spool and seal ring again simultaneously, so people remove the ball valve that damages come often, change new ball valve and recover to use.As from the foregoing, above-mentioned ball valve life-span is short, is not durable very much, is removed after the damage not repair and abandon, and has caused great energy waste, not environmental protection.

Summary of the invention

Short in order to overcome the existing ball valve life-span, be not durable very much, and problem such as be inconvenient to keep in repair, the utility model provides a kind of axial elasticity sealing and has conveniently replaced the ball valve of ball core and seal ring, pressure is flexible between the spool of this ball valve and the seal ring, it or not rigidity, ball core and seal ring are not easy to wear, and wearing and tearing are uniform wears, can in time be compensated again after the wearing and tearing, friction between ball core and the seal ring can be not increasing yet, because the ball core and the valve rod mating part of this ball valve adopt boss structure, perhaps adopt the shrinkage pool structure that communicates with ball core through hole simultaneously, difficult being twisted by valve rod turned over, therefore the working life of having improved this ball valve greatly.The ball core and the seal ring of this ball valve are conveniently replaced, and can give its repeatedly life, up to valve seat damage, have improved the use value of this valve greatly, not only economy but also environmental protection.

The technological scheme that its technical problem that solves the utility model adopts is: radially offer big square hole, big square hole circumcircle ring boss along valve body; Along valve body be axially arranged with tape spool to the sealing piston, the piston both sides have the projection the spline guide pad, be inserted in the valve seat spline guiding groove, piston can endwisely slip, and can not rotate; The circular shrinkage hole of piston one end installation seal ring radially opening forms the breach circular shrinkage hole, and opening makes progress, and towards big square hole, seal ring can vertically be inserted in the breach circular shrinkage hole along the radial opening of piston; Set up spring in the piston the other end annular groove, the spring the other end is embedded in the annular groove of axial end cap, and axial end cap is linked together by screw thread and valve body, owing on the piston shaft shoulder is arranged, the porose shoulder of valve body axial hole, the stroke of limited piston makes spring be in compressive state.The valve body axial bore the other end also adopts same structure, repeats no more.By the radial hole above the valve body, respectively two seal rings are inserted in the breach circular shrinkage hole of two-piston along the radial opening of piston, the core of holding the puck then as the dress dryelement cell, is pressed into the ball core, makes ball core and two seal ring driving fits; Ball core and valve rod mating part, adopt the shrinkage pool or the protruding handle structure that communicate with ball core through hole, shrinkage pool or protruding handle make the centering round platform (or circular hole) below the ball core match with the centering circular hole (or round platform) of valve body bottom straight up simultaneously, prevent ball core left and right sides unbalance stress and are offset; After in the valve stem seal groove, installing seal ring, the shrinkage pool (or boss) of valve rod lower end surface and the boss (or shrinkage pool) above the ball core are worked good, on valve rod, put positioning rod again, the center hole of valve gap packs into valve rod, be linked together by screw thread and valve seat annulus boss radially, it is the 0-90 degree that annulus boss inwall has limiting stopper restriction positioning rod slewing area, between annulus raised head face and the valve gap gasket seal is arranged.At valve stem tip cover upper ejector lever, lock nut at last, so just be assembled into the ball valve that the bilateral axial elasticity sealed and conveniently replaced spool and seal ring.

In order to reduce the axial dimension of ball valve, ball valve one end adopts above-mentioned axial elasticity sealing configuration, the other end then adopts the rigid seal structure of axial restraint, the circular shrinkage hole of this rigid seal end installation seal ring radially opening forms the breach circular shrinkage hole, opening upwards, towards valve seat circular radial annular distance, seal ring radially opening can vertically be inserted in the breach circular shrinkage hole; Valve body is gone to the bottom does not have centering circular hole (or round platform), there is not centering round platform (or circular hole) below the ball core, other structure sealed and conveniently replaced spool and seal ring with above-mentioned bilateral axial elasticity ball valve is identical, and the ball valve that is assembled into like this is one-sided axial elasticity sealing and the ball valve of conveniently replacing spool and seal ring.This ball valve elastic packing end is the fluid inlet end, the rigid seal end is an outlet end, the seal ring that the rigid seal end adopts is more wear-resisting than the seal ring of elastic packing end, can reduce the side-play amount of valve rod because of the ring wear generation of rigid seal end like this, guarantees that valve rod can normal rotation.

In order to simplify the structure of above-mentioned two kinds of ball valves (sealing of bilateral axial elasticity and the sealing of one-sided axial elasticity), simplify production technology, reduce production costs, the spline guide pad of projection is not established in the piston both sides, do not establish the spline guiding groove on the valve body, the circular shrinkage hole that piston is installed seal ring is opening radially not, and piston can slide and also can rotate; The circular shrinkage hole that the rigid seal end of one-sided axial elasticity seal ball-valve is installed seal ring is opening radially not; In addition, other structure of ball valve remains unchanged, and the axial elasticity seal ball-valve that simplifies the structure is so equally conveniently replaced ball core and seal ring.

Above-mentioned axial elasticity seals and conveniently replaces the ball valve of ball core and seal ring, damage when leaking, close nearest upstream control valve or main valve immediately, turn on valve gap with adjustable spanner, because valve gap, valve rod, positioning rod, seal ring, spanner connect together by nut, formed an integrated package, in fact integrated package is taken out when therefore extracting valve gap, exposing damaged ball core and seal ring can take off, change new seal ring and ball core, installing integrated package can repair, and recovers to use.Seal ring between valve rod and the valve gap as wearing and tearing, can be removed valve rod and change.Because piston remains static in this ball valve using process substantially, the seal ring between piston and the valve seat is not easy to wear, and Life cycle is long, in case wearing and tearing also can be removed piston and change.

The beneficial effects of the utility model are, have improved the working life of ball valve greatly, and energy-conserving and environment-protective cut the waste; Owing to simple in structure, conveniently replace spool and seal ring simultaneously, be convenient to maintenance, bring convenience to the user.

Description of drawings

Fig. 1 is first embodiment's axonometric drawing of the present utility model

Fig. 2 is the piston shaft mapping that is provided with spline guide pad and radial opening among Fig. 1

Fig. 3 is the erection drawing of ball valve among Fig. 1

Fig. 4 is the enlarged view of A-A section among Fig. 3

Fig. 5 is the enlarged view of B-B section among Fig. 3

Fig. 6 is second an embodiment's of the present utility model erection drawing

Fig. 7 is the 3rd an embodiment's of the present utility model erection drawing

Fig. 8 is the 4th an embodiment's of the present utility model erection drawing

Fig. 9 is the 5th an embodiment's of the present utility model erection drawing

1. seal rings among the figure, 2. ball core, 3. valve body, 4. positioning rod, 5. gasket seal, 6. valve gap, 7. valve rod, 8. spanner, 9. nut, 10. little seal ring, 11. limiting stoppers, 12. big seal rings, 13. pistons, 14. springs, 15. outside thread end caps, 16. internal thread end caps.

Embodiment

Embodiment one, and Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5 are for bilateral axial elasticity sealing and conveniently replace the ball valve of ball core and seal ring.Axially the pack valve body 3 of the piston 13 of big seal ring 12 along valve body 3 will be installed, and the spline guide pad of piston 13 both sides projectioies is inserted in the valve body 3 spline guiding grooves, piston 13 can endwisely slip, can not rotate, the breach of the breach circular shrinkage hole of the seal ring 1 of piston 13 1 ends installation simultaneously is towards the circular radial annular distance of valve body 3; At piston 13 the other ends covers upper spring 14, press outside thread end cap 15 and be locked on the valve body 3 at spring 14 the other ends again; Since on the piston 13 shaft shoulder is arranged, the stroke of porose shoulder limited piston in valve body 3 axial holes, and spring 14 is in compressive state.Equally, piston 13, spring 14, the internal thread end cap 16 of also packing into successively and studding with big seal ring 12 at the valve body 3 axial the other ends.By valve body 3 circular radial annular distances, radial opening along two pistons 13 inserts two seal rings 1 respectively, the hold the puck protruding handle of core 2, as the dress dryelement cell, be pressed into ball core 2, make ball core 2 and the sealing of two seal rings 1, the protruding handle that makes ball core 2 simultaneously injects in the centering circular hole that valve bodies 3 go to the bottom centering round platforms below the ball core 2 straight up; Radially put gasket seal 5 in the upper-end surface of annulus boss at valve body 3, the shrinkage pool that will install valve rod 7 lower end surfaces of little seal ring 10 then is enclosed within on the protruding handle of ball core 2, on valve rod 7, put positioning rod 4 again, the center hole of valve gap 6 is enclosed within on the valve rod 7, is linked together by screw thread and valve seat 3 annulus boss radially; Annulus boss inwall has limiting stopper 11, and restriction positioning rod 4 slewing areas are the 0-90 degree.At valve stem tip cover upper ejector lever 8, lock nut 9 at last, assembling is finished, and can come into operation.

Embodiment two, as shown in Figure 6, seal and conveniently replace another example of the ball valve of ball core and seal ring for the bilateral axial elasticity.Compare with Fig. 4, the ball core 2 following centering circular holes that adopt, valve body 3 is gone to the bottom and is adopted centering round platform, round platform and circular hole Spielpassung.Other structure is identical with ball valve shown in Figure 4, repeats no more.

Embodiment three, as shown in Figure 7, seal and conveniently replace the 3rd example of the ball valve of ball core and seal ring for the bilateral axial elasticity.Compare with Fig. 6, adopt the shrinkage pool structure that communicates with ball core 2 through holes above the ball core 2, protruding handle structure is adopted in valve rod 7 lower end surfaces, protruding handle and shrinkage pool Spielpassung.Set up gasket seal between the annulus lower end surface in positioning rod 4 and valve gap 6, hydrodynamic pressure promotes valve rod 7 and moves up, and compresses gasket seal, plays the effect of end face seal.Other structure is identical with ball valve shown in Figure 6, repeats no more.

Embodiment four, as shown in Figure 8, seal and conveniently replace the ball valve of ball core and seal ring for one-sided axial elasticity.Compare with Fig. 4, the one end adopts the axial elasticity sealing configuration identical with Fig. 4, the other end then adopts the rigid seal structure of axial restraint, the circular shrinkage hole of this rigid seal end installation seal ring 1 radially opening becomes the breach circular shrinkage hole, breach is towards valve body 3 circular radial annular distances, with seal ring 1 radially breach vertically be inserted in the breach circular shrinkage hole; Valve body 3 bottom surfaces do not have the centering circular hole, ball core 2 following nothing centering round platforms, and other structure is identical with ball valve shown in Figure 4, and installation step repeats no more too here.This ball valve elastic packing end is the fluid inlet end, the rigid seal end is an outlet end, the seal ring 1 that its rigid seal end adopts is more wear-resisting than the seal ring 1 of elastic packing end, can reduce the side-play amount of valve rod 7 because of the seal ring 1 wearing and tearing generation of rigid seal end like this, has guaranteed that valve rod 7 can normally move.

Embodiment five, as shown in Figure 9, seal and conveniently replace the ball valve of ball core and seal ring for one-sided axial elasticity.Compare with Fig. 8, piston 13 both sides do not have the spline guide pad of projection, and the axial hole of valve body 3 does not have the spline guiding groove, and the circular shrinkage hole that piston 13 is installed seal ring does not have radial opening, and piston 13 can slide and also can rotate; The circular shrinkage hole that the rigid seal end is installed seal ring does not have radial opening; In addition, other structure of ball valve is identical with Fig. 8, repeats no more.

This axial elasticity sealing that the utility model provides and the ball valve of conveniently replacing ball core and seal ring, when it leaks, close nearest upstream control valve immediately, turn on valve gap 6 with adjustable spanner, because valve gap 6, valve rod 7, positioning rod 4, little seal ring 10, spanner 8 connect together by nut 9, formed an integrated package, therefore in fact integrated package is taken out when extracting valve gap 6, exposing damaged ball core 2 and seal ring 1 can take off, change new seal ring 1 and ball core 2, installing integrated package can repair, and recovers to use.Little seal ring 10 between valve rod 7 and the valve gap 3 as wearing and tearing, can be removed valve rod 7 and change; Because piston 13 remains static in this ball valve using process substantially, the big seal ring 12 between piston 13 and the valve body 3 is not easy to wear, and Life cycle is long, in case wearing and tearing also can be removed piston 13 and change.

Claims

1, a kind of axial elasticity seals and conveniently replaces the ball valve of ball core and seal ring, form by valve body, seal ring, ball core, valve rod, valve gap, piston, spring, end cap, positioning rod, spanner, nut, divide two kinds of one-sided axial elasticity sealing and the sealings of bilateral axial elasticity; It is characterized in that: seal ring is contained on the piston, and piston can move axially, and the sealing force of seal ring and ball core is spring is passed to seal ring by piston a elastic force.

2, axial elasticity according to claim 1 seals and conveniently replaces the ball valve of spool and seal ring, and it is characterized in that: piston is provided with the shaft shoulder.

3, axial elasticity according to claim 1 seals and conveniently replace the ball valve of spool and seal ring, it is characterized in that: there is protruding handle ball core upper end, and there is shrinkage pool the valve rod lower end surface, protruding handle and shrinkage pool Spielpassung; Perhaps there is the shrinkage pool that communicates with ball core through hole ball core upper end, and there is protruding handle the valve rod lower end surface, protruding handle and shrinkage pool Spielpassung.

4, according to claim 1 and the sealing of 3 described axial elasticities and conveniently replace the ball valve of spool and seal ring, it is characterized in that: when ball valve was the bilateral elastic packing, the centering round platform was set up in ball core lower end, and valve body is gone to the bottom and set up the centering circular hole, round platform and circular hole Spielpassung; Perhaps the centering circular hole that communicates with ball core through hole is set up in ball core lower end, and valve body is gone to the bottom and set up the centering round platform, round platform and circular hole Spielpassung.

5, axial elasticity according to claim 1 seals and conveniently replaces the ball valve of spool and seal ring, it is characterized in that: valve body radially offers big square hole, above the big square hole annulus boss is arranged, seal ring and ball core can be assembled to the valve body by the annulus hole and the big square hole of annulus boss above valve body.