CN202441913U

CN202441913U - Bellow ball valve

Info

Publication number: CN202441913U
Application number: CN2012200779549U
Authority: CN
Inventors: 叶建中; 邱晓来; 王汉洲; 黄明金; 吴寿敬
Original assignee: ZHEJIANG CHAODA VALVE CO Ltd
Current assignee: Chaoda Valve Group Co., Ltd.
Priority date: 2011-11-09
Filing date: 2012-03-05
Publication date: 2012-09-19
Anticipated expiration: 2022-03-05

Abstract

The utility model discloses a bellow ball valve which comprises a valve body, a valve cover, a ball body and a valve rod. The upper end and the lower end of the ball body are provided with an upper shaft hole and a lower shaft hole which are coaxially arranged. The lower end of the valve body is provided with a lower shaft which is in running fit with the lower shaft hole of the ball body in penetrating mode. The lower end of the valve rod is provided with a spiral twisting-shaped extending end, the spiral extending end of the valve rod is positioned in the upper shaft hole of the ball body in penetrating mode, a locking pin is arranged between the spiral extending end of the valve rod and the upper shaft hole of the ball body, an adjusting ring is positioned between the ball body and the valve cover, the adjusting ring is sleeved at the spiral extending end of the valve rod to form limit clamp with an outer end face of the upper shaft hole of the ball body, a bellow is positioned between the valve rod and the valve cover, the valve core is further provided with a guide pin, the valve rod is provided with a guide groove matched with the guide pin, and the valve rod can only move in linearly up and down due to matched rotation of the guide pin and the guide groove. By means of the structure, the ball valve can be maintained in online mode, is free of leakage, high in environment protection performance and safe and reliable to use for a long time.

Description

A kind of bellows ball valve

Technical field

The utility model relates to a kind of valve, is specifically related to a kind of bellows ball valve.

Background technique

The valve of in commercial plants such as oil, petrochemical industry, chemical industry, nuclear power, using; Its circulation medium is comprising high temperature, high pressure, high pollution, inflammable, explosive, hypertoxic usually; Even high-risk characteristics such as radioactivity are arranged, in case leak or be dispersed in the atmosphere, will cause immeasurable harm.Thereby the valve of straight journey, like gate valve, stop valve, its valve stem seal has also increased the sylphon seal mode except the packing seal of routine, to stop the external leakage of valve internal medium.But the switch of ordinary ball valve is that 90 ° of rotations through valve rod realize, when ordinary ball valve adopts bellows to carry out valve stem seal; In the opening and closing process of valve; Bellows will receive torsional deflection rather than dilatation, and bellows is not suitable for torsional deflection, therefore; In the switching process of ball valve, bellows must damage under torsional deflection and lose efficacy.At present, in order to address this problem, a plurality of schemes have appearred; Like publication number CN101832401A bellows ball valve, bellows and transmission cover, drive lead screw are fixed, though can bellows be used; But because the defective of structure has increased many places leakage points such as transmission cover on the contrary; Publication number CN101629639A lifting rod type corrugated pipe ball valve; The effect of not reversed though realized bellows to stretch up and down; But it is arranged on as easy as rolling off a log the breaking down of helical groove structure of valve internal, and the restriction of valve seat construction makes it to carry out on-line maintenance, simultaneously bellows structure is not had any description; And common bellows can't normally use under HTHP, thus this scheme also can't be in high-risk medium and environment safe, reliable and long-term use.

Summary of the invention

To the deficiency of existing technology, the utility model provide a kind of can on-line maintenance, do not have leak outside, height environmental protection and the reliable bellows ball valve of using of long-term safety.

For realizing above-mentioned purpose, the utility model provides a kind of bellows ball valve, comprises valve body, valve gap, spheroid, valve rod; Valve gap is installed on the valve body, and spheroid is loaded on the inner chamber runner of valve body, is provided with seal valve seat between spheroid and the valve body; Valve rod passes valve gap and is connected with the interior spheroid of valve body, and the upper and lower end of spheroid offers the upper and lower axis hole of coaxial setting, and the upper shaft hole of spheroid is a through hole; The lower shaft hole of spheroid is a blind hole, and the central axis of the central axis of said upper and lower axis hole and body cavity runner is perpendicular, and it intersects vertically and a little is the centre of sphere of said spheroid; The lower end of valve body is equipped with the lower shaft that the lower shaft hole with said spheroid is rotatably assorted, and the lower end of said valve rod is provided with a boss, and the lower end surface of boss is also extended and is provided with the extending end of twisted shape in the shape of a spiral; And the spiral angle of its spiral extension end is 90 degree, and the spiral extension end of said valve rod is arranged in the upper shaft hole of said spheroid, is provided with stop pin between the spiral extension end of valve rod and the upper shaft hole of spheroid; Be provided with regulating ring between spheroid and the valve gap, described regulating ring is set in the limit card that constitutes on the spiral extension end of valve rod spheroid upper shaft hole exterior edge face, is provided with bellows between valve rod and the valve gap; Described bellows is set on the valve rod; Weld with the upper-end surface of valve rod convex platform mutually the lower end of bellows, and the upper end of bellows is connected with the bellows welding base, described bellows welding base and valve gap welding; Also be provided with guide finger on the said valve gap; Said valve rod is provided with and the suitable guiding groove of said guide finger, and rotates down in cooperating of said guide finger and guiding groove, straight line motion about valve rod can only be done.

The beneficial effect of the utility model is: adopt said structure; Owing to be provided with seal valve seat between spheroid and the valve body; Be provided with the lower shaft that is rotatably assorted between the lower shaft hole of spheroid and the valve body; Be provided with the regulating ring of limit card mutually between the upper shaft hole exterior edge face of spheroid and the valve gap, so spheroid is limited in can only rotating along central axis between lower shaft, valve gap and the regulating ring; Described valve rod rotated down in cooperating of guide finger and guiding groove, straight line motion about valve rod can only be done, and the extending end that is connected with spheroid of said valve rod twisted shape in the shape of a spiral; And the spiral angle of its spiral extension end is 90 degree, so the straight line motion up and down of valve rod can drive spheroid and rotate, and realizes the open and close to the body cavity runner; Simultaneously the straight line motion up and down of valve rod has guaranteed that bellows only makes fore and aft motion up and down; Avoid the torsional deflection problem of bellows effectively, but made bellows long-term safety reliable work, solved the problem that causes medium to leak outside because of the valve rod rotation fully; The real nothing that realizes ball valve leaks outside, height environmental protection and long-term safety are used reliably; Other only needs the dismounting valve gap, just can realize dismounting and on-line maintenance to valve seat from the valve body upper end, makes the maintenance of valve efficient and convenient.

The utility model can further be set to described bellows and is welded by some dish-shaped ring plate stacks, also is provided with the stuffing box packing letter between bellows welding base and the valve rod.

Adopt said structure; Because described bellows is to be welded by some dish-shaped ring plate stacks; Therefore can make bellows can either bear higher pressure, have elastic deformability preferably simultaneously again, also can adjust the thickness and the quantity of dish-shaped ring plate in addition according to different requirement; The stuffing box packing letter is set between bellows welding base and valve rod, can further improve the sealing of the relative valve gap of valve rod.

The seal valve seat that the utility model also can further be set to be provided with between said spheroid and the valve body is made up of valve seat body, valve seat insert, valve seat supporting, valve seat supporting ring, gland, spring, spring seat.

Adopt said structure, can further improve the sealing between spheroid and the valve body, avoid leaking of medium.

The upper end that the utility model also can further be set to said valve rod passes valve gap and is externally connected with actuating device; Described actuating device comprises the actuating device shell; The actuating device shell is provided with handle with sleeve and the aperture pointer with the valve rod interlock, also is provided with on the actuating device shell and the suitable indicating graduation of said aperture pointer.

Adopt said structure,, make operator can observe the motion state of valve intuitively through the variation directly perceived of aperture pointer and indicating graduation.

Description of drawings

Fig. 1 is the structural representation of valve open state in the utility model;

Fig. 2 is the structural representation of valve closing state in the utility model;

Fig. 3 is the I portion enlarged view of Fig. 2;

Fig. 4 is the partial structurtes stereogram of valve rod in the utility model;

Fig. 5 is the structural representation of bellows in the utility model.

Embodiment

Like Fig. 1,2, provided a kind of bellows ball valve shown in 3, comprise valve body 1, valve gap 2, spheroid 3, valve rod 4, valve gap 2 is installed on the valve body 1; Spheroid 3 is loaded on the inner chamber runner 101 of valve body 1, is provided with seal valve seat 5 between spheroid 3 and the valve body 1, and valve rod 4 passes valve gap 2 and is connected with valve body 1 interior spheroid 3; The upper and lower end of spheroid 3 offers upper shaft hole 301, the lower shaft hole 302 of coaxial setting, and the upper shaft hole 301 of spheroid 3 is a through hole, and the lower shaft hole 302 of spheroid 3 is a blind hole; The central axis of said upper shaft hole 301, lower shaft hole 302 and the central axis of valve body 1 inner chamber runner 101 are perpendicular; And it intersects vertically and is that some the centre of sphere of said spheroid 3, the lower end of valve body 1 are equipped with the lower shaft 6 that the lower shaft hole 302 with said spheroid 3 is rotatably assorted, and the lower end of said valve rod 4 is provided with a boss 401; The lower end surface of boss 401 is also extended and is provided with the extending end 402 of twisted shape in the shape of a spiral; And the spiral angle of its spiral extension end 402 is 90 degree, promptly goes up helicoid 4021 and following helicoid 4022 perpendicular (as shown in Figure 4), and the spiral extension end 402 of said valve rod 4 is arranged in the upper shaft hole 301 of said spheroid 3; Be provided with stop pin 7 between the spiral extension end 402 of valve rod 4 and the upper shaft hole 301 of spheroid 3; Be provided with regulating ring 8 between spheroid 3 and the valve gap 2, described regulating ring 8 is set in the limit card that constitutes on the spiral extension end 402 of valve rod 4 spheroid 3 upper shaft holes 301 exterior edge faces, is provided with bellows 9 between valve rod 4 and the valve gap 2; Described bellows 9 is welded by some dish-shaped ring plate 901 stacks; Described bellows 9 is set on the valve rod 4, and weld with the upper-end surface of valve rod 4 convex platforms 401 mutually the lower end of bellows 9, and the upper end of bellows 9 is connected with bellows welding base 10; Described bellows welding base 10 and valve gap 2 welding also are provided with stuffing box packing letter 12 between bellows welding base 10 and the valve rod 4.Also be provided with guide finger 11 on the said valve gap 2, said valve rod 4 is provided with the guiding groove 403 suitable with said guide finger 11, and rotates down straight line motion about valve rod 4 can only be done in cooperating of said guide finger 11 and guiding groove 403.The seal valve seat 5 that is provided with between said spheroid 3 and the valve body 1 is made up of valve seat body 501, valve seat insert 502, valve seat supporting 503, valve seat supporting ring 504, gland 505, spring 506, spring seat 507.The upper end of said valve rod 4 passes valve gap 2 and is externally connected with actuating device 13; Described actuating device 13 comprises actuating device shell 131; Actuating device shell 131 is provided with handle with sleeve 132 and the aperture pointer 133 with valve rod 4 interlock, also is provided with the indicating graduation 134 suitable with said aperture pointer 133 on the actuating device shell 131.

Adopt said structure, handle with sleeve 132 rotates, and drives valve rod 4 and under the effect of guide finger 11 and guiding groove 403, makes straight line motion up and down; And described spheroid 3 can only rotate along the central axis of valve rod 4 under the effect of lower shaft 6, valve gap 2 and regulating ring 8, realizes the keying to valve; Simultaneously the straight line motion up and down of valve rod 4 guaranteed bellows 9 only does about fore and aft motion; Avoid the torsional deflection problem of bellows 9 effectively, but made bellows 9 long-term safety reliable work, solved the problem that causes medium to leak outside because of valve rod 4 rotations fully; The real nothing that realizes ball valve leaks outside, height environmental protection and long-term safety are used reliably; Other only needs dismounting valve gap 2, just can realize dismounting and the on-line maintenance to seal valve seat 5 from valve body 1 upper end, makes the maintenance of valve efficient and convenient.

Claims

1. a bellows ball valve comprises valve body, valve gap, spheroid, valve rod, and valve gap is installed on the valve body; Spheroid is loaded on the inner chamber runner of valve body, is provided with seal valve seat between spheroid and the valve body, and valve rod passes valve gap and is connected with the interior spheroid of valve body; It is characterized in that: the upper and lower end of spheroid offers the upper and lower axis hole of coaxial setting, and the upper shaft hole of spheroid is a through hole, and the lower shaft hole of spheroid is a blind hole; The central axis of the central axis of said upper and lower axis hole and body cavity runner is perpendicular, and it intersects vertically and is that some the centre of sphere of said spheroid, the lower end of valve body are equipped with the lower shaft that the lower shaft hole with said spheroid is rotatably assorted; The lower end of said valve rod is provided with a boss, and the lower end surface of boss is also extended and is provided with the extending end of twisted shape in the shape of a spiral, and the spiral angle of its spiral extension end is 90 degree; The spiral extension end of said valve rod is arranged in the upper shaft hole of said spheroid, is provided with stop pin between the spiral extension end of valve rod and the upper shaft hole of spheroid, is provided with regulating ring between spheroid and the valve gap; Described regulating ring is set in the limit card that constitutes on the spiral extension end of valve rod spheroid upper shaft hole exterior edge face; Be provided with bellows between valve rod and the valve gap, described bellows is set on the valve rod, and weld with the upper-end surface of valve rod convex platform mutually the lower end of bellows; The upper end of bellows is connected with the bellows welding base; Described bellows welding base and valve gap welding also are provided with guide finger on the said valve gap, said valve rod is provided with and the suitable guiding groove of said guide finger; And in cooperating under the rotation of said guide finger and guiding groove, valve rod can only be made straight line motion up and down.

2. a kind of bellows ball valve according to claim 1 is characterized in that: described bellows is welded by some dish-shaped ring plate stacks, also is provided with the stuffing box packing letter between bellows welding base and the valve rod.

3. a kind of bellows ball valve according to claim 1 is characterized in that: the seal valve seat that is provided with between said spheroid and the valve body is made up of valve seat body, valve seat insert, valve seat supporting, valve seat supporting ring, gland, spring, spring seat.

4. a kind of bellows ball valve according to claim 1; It is characterized in that: the upper end of said valve rod passes valve gap and is externally connected with actuating device; Described actuating device comprises the actuating device shell; The actuating device shell is provided with handle with sleeve and the aperture pointer with the valve rod interlock, also is provided with on the actuating device shell and the suitable indicating graduation of said aperture pointer.