CN2164485Y

CN2164485Y - Corrugated pipe ball core valve

Info

Publication number: CN2164485Y
Application number: CN 93204155
Authority: CN
Inventors: 吴海宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-01
Filing date: 1993-03-01
Publication date: 1994-05-11
Anticipated expiration: 2003-03-01

Abstract

The utility model relates to a corrugated pipe ball core valve, which is a valve with novel structure and is composed of a valve body, a middle body, valve core components, a valve seat and a handle. The corrugated pipe is used for replacing the fillers of a normal valve, and at the same time, a high-accuracy sphere body which can rotate freely is used for replacing a valve flap of the normal valve. The valve core components can prevent the fluid in a valve cavity from leaking and can improve the seal between the valve flap and the valve seat so as to solve the problems of leakage along a valve rod and short service life of the valve flap of prior valves.

Description

Corrugated pipe ball core valve

The utility model relates to a kind of valve, especially the valve of favorable sealing property.

The various valves of existing extensive use, they open and close flap normally valve rod extension partly, be integral with valve rod, form through turning processing and heat treatment, or assemble with valve rod, flap is with the valve rod lifting action, the implementation valve opens and closes effect.The sealing that valve pocket is inside and outside, because valve rod is to expose in valve pocket, so depend on the filler around the valve rod fully, filler is compressed by gland, is used for preventing leaking, this is traditional valve mechanism.The stuffing box packing of valve and valve rod rub mutually like this, the degree of wear is directly proportional with filler impacting force that gland is executed, the result of wearing and tearing will make between filler and the valve rod and the gap occur, thereby cause valve pocket inner high voltage fluid along valve rod to external leakage, and in case occur leaking, just can not stop voluntarily, have only to screw the filler gland once more, or use new valve instead and can stop leaking.In addition, the shape of flap is generally the conical surface or plane, under the frequent rotation and lifting moving of valve rod, the applying sealing surface of flap and valve seat, also be everlasting and lose original precision under frequent movement or the overload pressure, impression occurs and lose sealing, cause closing inefficacy, this is a conventional valves not long basic reason in working life.

The purpose of this utility model provides a kind of novel valve structure, and it has solved the seal failure problem of filler, thereby has improved the sealability of flap.

The purpose of this utility model is achieved in that its key Design is to adopt bellows, completely cut off the getting in touch of valve rod and valve pocket, valve rod need not seal, therefore the effect of filler in the conventional valves, be cancelled,, both can have adapted to opening of valve rod because bellows has certain extending amount, close movement requirement, overload pressure in the time of also can cushioning spheroid and contact with valve seat, the generation of leaking is fundamentally stopped in the slit that can not occur leaking outside inside and outside the valve pocket of this bellows ball core valve.

Second key Design of this valve is to adopt high-precision spheroid, replaces the flap in the conventional valves, as the part that opens and closes of valve.Spheroid is bumped in the ball box, spheroid can comprehensively freely rotate in the ball box, because the spheroid that can rotate all has position change when opening and closing at every turn, spherome surface and the identical feature that has non-directional, delocalization cooperating of valve seat, therefore, the sealability of fitting surface is better, and the wearing and tearing of sphere are also less.

The utility model bellows ball core valve is compared with the prior art valve, has sealing sphere reliable, that stop to leak outside, freely rotate and opens and closes distinguishing features such as excellent performance, long service life.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is traditional valve mechanism;

Fig. 2 is a mangetic core assembly structure of the present utility model;

Fig. 3 is an an embodiment's of the present utility model sectional structure chart.

Fig. 4 is the bellows coupled condition and the soldering point of mangetic core assembly.

Among the figure, (1) valve body, (2) flap, (3) valve rod, (4) Stem Mut, (5) valve gap, (6) filler, (7) filler gland, (8) gland nut, (9) handwheel, (10) spheroid, (11) ball box, (12) elastic component, (13) cover for seat, (14) bellows, (15) valve rod, (16) connecting body, (17) screw rod, (18) gland, (19) pin, (20) (22) pad, body in (21), (23) valve seat, (24) weld seam.

Filler among Fig. 1 (6) is compressed by filler gland (7) and plays seal action, because the rotation and the lifting moving of valve rod (3), filler (6) weares and teares easily and loses original geometric accuracy, thereby occurs leaking.Flap (2) is assembled on the valve rod (3), and the valve seat on it and the valve body (1) often presses off mutually or opens, and is to occur impression easily and loss of seal on its surface of contact.

Spheroid among Fig. 2 (10) is embedded in the ball box (11), and spheroid is made by stainless steel material, can be solid sphere, also can make hollow shell, and they all have high-precision spherical profile degree (＜0.02 millimeter) and sphere roughness (＜0.2 micron).Spheroid (10) is supported by elastic component (12) in ball box (11), can freely rotate, valve seat surface (23) (see figure 3) that contacts with spheroid (10) is through grinding, and its garden tapering also is high-precision, therefore, spherome surface cooperates very accurate with valve seat surface, can obtain excellent sealing effect, and when opening and closing, spheroid (10) there is not fixing position at every turn, has non-directional, the feature of delocalization, thus wearing and tearing can be reduced, improve sealing.Bellows (14) is also by the stainless steel material manufacturing, has certain extending amount, can adapt to valve rod opens, close the needs of valve, it has replaced the filler in the conventional valves, play reliable seal action, the two ends of bellows (14) are welded into one with cover for seat (13) and junctor (16) respectively, junctor (16) is sealed by scyewed joint and by pad (22) with middle body (21) (see figure 3), junctor (16) is actionless with middle body (21) and valve body (1), cover for seat (13) then moves with valve rod (15), bellows and ball box (11) be the lifting moving with valve rod (15) then, bellows (14) can also cushion the overload pressure of spheroid (10) and valve seat (23), and spheroid is reduced wear.

Mangetic core assembly (Fig. 2) has been assemblied in valve body (1) and the middle body (21), rotation along with handwheel (9), mangetic core assembly is valve body (1) and lifting moving relatively, so the moving spheroid of the ball tape of mangetic core assembly lower end is made lifting moving, thereby open and close valve seat (23), between spheroid (1) and the valve seat (23) there be accurate the cooperation, can obtain the sealing of height.Bellows is then driven by valve rod, makes it flexible, as can be seen from Figure 4 the valve pocket of valve realized with the external world by bellows isolated fully, thereby remove along any issuable gap that valve rod leaks outside.

Claims

1, a kind of valve, it is made up of valve body, middle body, mangetic core assembly, valve seat and handwheel, it is characterized in that: mangetic core assembly is assembled into an one-piece element in regular turn by spheroid, ball box, cover for seat, valve rod, bellows, connecting body, screw rod, gland: wherein spheroid is bumped in the ball box and is supported by elastomer in the box, can freely rotate, and move up and down with valve rod, thereby spherome surface also contacts accordingly or leaves with valve seat and opens and closes valve; The two ends of bellows are welded into one with cover for seat and connecting body respectively, and connecting body, middle body and valve body are that be tightly connected and actionless, valve rod is to be enclosed within the bellows, its two ends are fixed in cover for seat and screw rod respectively, screw rod is threaded with connecting body, shakes handwheel and drives valve rod, cover for seat, ball box, spheroid, can move up and down by screw rod.

2, valve according to claim 1 is characterized in that: described spheroid is the solid sphere of being made by stainless steel, can also make the hollow shell ball.

3, according to the described valve of claim, it is characterized in that: described bellows is made by stainless steel.