CN2344611Y

CN2344611Y - Sealed ball valve

Info

Publication number: CN2344611Y
Application number: CN 98223620
Authority: CN
Inventors: 涂海秋; 张华堂; 庄崇信
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-03
Filing date: 1998-04-03
Publication date: 1999-10-20
Anticipated expiration: 2008-04-03

Abstract

The utility model relates to a sealed ball valve, comprising a valve body, a valve gate and a valve rod. The valve body is provided wit a mounting flange. In addition, the sealed ball valve comprises a valve hood, a valve rod driving device and a valve cap. The front lower part of the valve hood is provided with a through hole and an annular surface, and the back of the valve hood is provided with an assembling flange. The valve stem driving device comprises a transmission mechanism which can enable the valve rod to rotate and a driving screw sleeve which is arranged in the valve cap and can actuate the driving device. After the valve body, the valve hood and the valve cover are installed and form a sealed ball valve, a corrugated pipe device is arranged for resealing the valve cover. Therefore, the sealed ball valve can avoid leakage and ice formation. The sealed ball valve is suitable for being used in apparatuses for conveying poisonous, stimulating and volatilizable or evaporable gas-liquid media.

Description

Seal ball-valve

The utility model relates to a kind of ball valve, more particularly, is that a kind of altogether air-flow or liquid stream device of being used for arranged, and prevents the seal ball-valve of gas and leak of liquid.

Valve in the conventional gas-liquid medium apparatus, no matter be gate valve, stopcock, plunger valve, stop valve and ball valve etc., under high pressure or low piezodielectric, use, in one not long period, will produce warp-wise and axially wearing and tearing in the contact position of valve handle and valve body, so the position has black ice, then more can further enlarge leakage area, so, the serious seepage phenomenon that valve occurs more particularly is contained on the valve of pipeline of the adjusting of toxic gas or refrigerant and control, leaks and also can cause the pollution of environment and the harm of human body, so, be extremely harmful.

The purpose of this utility model is to overcome the defective of the above conventional valve, is contained on gas or liquid medium equipment or the device and provide a kind of, can prevent gas and the outside seepage of liquid or the leakage of carrying, the seal ball-valve with all-sealed structure.

For achieving the above object, seal ball-valve of the present utility model, comprise valve body, valve, valve rod, wherein, described valve body wall at an upper portion thereof is provided with integrally formed mounting flange, and ball valve also comprises a valve bonnet, a valve rod driving device and a valve gap, described valve bonnet is a cylindrical body, be provided with a through hole in its preceding bottom, form an annular surface, in its back-end an integrally formed assembling nib on the end wall on through hole inlet side surface; Described valve gap is the pan-shaped cover of a band central shaft hole; Described valve rod driving device comprises that a driving mechanism and that valve rod is rotated is installed in rotation on the drive screw cover that also can actuate driving mechanism in the valve gap central shaft hole; Described valve bonnet is screwed on the mounting flange of valve body by its annular surface, and described valve gap is installed on the assembling nib of valve bonnet rear end with screw.

Ball valve as previously discussed, wherein, the driving mechanism of described valve rod driving device comprises gear, tooth bar and drive screw, wherein, described gear is a cylindrical gears, and is packed on the valve rod; Described tooth bar has and the corresponding profile of tooth teeth of gear; Described drive screw is a threaded stem, one end and tooth bar termination, and the other end and drive screw cover are spirally connected, and described tooth bar teeth are meshed with gear and are connected.

Ball valve as previously discussed, wherein, it comprises that also one is installed in the bellows arrangement between interior drive screw of valve bonnet and the drive screw cover, described bellows arrangement comprises a front head, a rear head and a bellows, described front head is the dish of band center hole, it is set in the connecting end of tooth bar and drive screw by center hole, described rear head also is the dish of band center hole, and it is set in by center hole that drive screw puts and its edge then places between the mating face that the web of the assembling nib of valve bonnet and valve gap constitutes in compacted mode.

Ball valve as previously discussed, wherein, be formed with on the inwall of the above side of described valve bonnet through hole one with two projections of longitudinal axis opposing parallel, and constitute a chute between them, described tooth bar one side places the chute of valve bonnet slidably.

Ball valve as previously discussed wherein, forms closed inner chamber between described valve body, valve bonnet and bellows arrangement, can fill bulking agent in the inner chamber, as oil.

Because seal ball-valve of the present utility model is to be equiped with valve bonnet, valve gap, valve rod driving device and bellows arrangement on the basis of former ball valve, make valve rod can make the breakdown at goal by driving components such as the gear rack of valve rod driving device and drive screw cover and screw rods, and utilize valve bonnet, bellows arrangement and valve gap that valve body and external environment are completely cut off, the samely also can between the valve body of valve bonnet and bellows arrangement, fill bulking agent, can stop freezing of ball valve.Like this, this seal ball-valve can be more suitable in poisonous, excitant or volatile, the high cryogenic gas of easy to leak or the feedway of liquid medium arranged, for example use in the feedway such as oil, chemical industry, pharmacy, electric power, freezing and air-conditioning.

Fig. 1 is first an embodiment of the present utility model cross-sectional schematic;

Fig. 2 is the A-A sectional view of a Fig. 1;

Fig. 3 is the B-B sectional view of a Fig. 1;

Fig. 4 is second an embodiment of the present utility model cross-sectional schematic.

See also Fig. 1, seal ball-valve of the present utility model comprises a valve body 1, a valve 2, a valve rod 3, a valve bonnet 4, a valve gap 5, a valve rod driving device 6 and a bellows arrangement 7, wherein, valve body 1 is two logical, have an export department 39, an import department 40, one into and out of between the oral area, inwall is the valve base of spherical, an and valve rod mounting hole vertical with the valve base horizontal axis, in addition, sidewall at an upper portion thereof is provided with an integrally formed mounting flange 11, and preferably mounting flange is annular.Valve 2 is a Ball valve, and is installed in the valve base of valve body 1.Valve rod 3 is assemblied in the valve rod mounting hole of valve body 1, and one head and valve 2 be connected, and the other end is then stretched out the valve rod mounting hole of valve body 1 and is provided with keyway thereon.

Valve bonnet 4 is a cylindrical body, be provided with a through hole in its underpart, the outerplanar cutting of this through hole forms an annular surface 12, the assembling nib 13 that radially extend end in its back-end integrally formed, on the inwall of its side more than through hole, be formed with one with two projections 14,14 of longitudinal axis opposing parallel ', and constitute a chute 34 between them.Described valve bonnet 4 is assemblied on the mounting flange 11 of valve body 1 by annular surface 12 usefulness screws.In order to keep the excellent sealing between valve body 1 and the valve bonnet 4, they mounting flange 11 and annular surface 12 between be provided with sealing gasket 26.

Valve gap 5 is one to be provided with the pan-shaped cover of central shaft hole, and its near side (ns) forms the mounting hole of circumference uniform distribution along being provided with boss on boss.Described valve gap 5 is assemblied on the assembling nib 13 of valve bonnet 4 with screw 27 by mounting hole.

Valve rod driving device 6 comprises that a driving mechanism and that valve rod 3 is rotated is installed in rotation on the drive screw cover 8 that also can promote the driving mechanism motion in valve gap 5 central shaft holes.Driving mechanism comprises a gear 15, a tooth bar 16 and a drive screw 17, and wherein, described gear 15 is selected straight toothed spur gear usually for use, and is installed in by key 18 on the free end of valve rod 3; Described tooth bar 16 is provided with the modulus profile of tooth identical with gear 15; Described drive screw 17 its surperficial cars have outside thread, and an end of one head and tooth bar 16 is connected in the termination mode.

Drive screw cover 8 forwardly is provided with a tapped center hole 23, and the rear portion is an axle portion 24, at middle part surface convex shoulder 25 is arranged.Described drive screw cover 8 is installed in the central shaft hole of valve gap 5, and its front portion extend in the valve bonnet 4.Like this, the other end (free end) of the drive screw 17 of described driving mechanism will be overlapped 8 center hole with drive screw and be spirally connected, and the teeth of the teeth of described tooth bar 16 and gear 15 are connected with a joggle, and the dorsal part of tooth bar places the chute 34 of valve bonnet 4 slidably.

Bellows arrangement 7 comprises a front head 21, a rear head 22 and a bellows 20, and wherein, front head 21 is the disc of band center hole, and can and be fixed on tooth bar 16 and the ends, two ends that drive screw 17 is connected relatively by this center hole suit; Rear head 22 is provided with uniform mounting hole for the dish of band center hole at its place of keeping to the side; Rear head 22 can be sleeved on the drive screw cover 8 by center hole, and by mounting hole it is kept to the side place's cramping between the boss of the installation nib 13 of valve bonnet 4 and valve gap 5; One bellows 20 is the light wall pipe body of cross section profile of tooth symmetry, makes with stainless steel material usually, and its two ports are fixed on the apparent surface of front head 21 and rear head 22 in the mode of welding respectively.In addition, be equipped with sealing gasket 36 between the edge of the assembling nib 13 of valve bonnet 4 and the rear head relative and between the platform of valve gap 5 and the rear head edge relative with it with it.

The rear portion of described valve gap 5 is provided with an integrally formed projecting ring section, the central shaft hole of described valve gap is a shoulder hole, this shoulder hole is provided with internal thread in its aperture, in addition, ball valve also comprises gland nut 10 and some seal rings 19 of a band center hole, wherein, gland nut 10 is loaded on the drive screw cover 8 by the center hole flip sleeve and is spirally connected with the internal thread of the shoulder hole of valve gap 5, and 19 of described seal rings are assemblied in the gap between valve gap shoulder hole and the drive screw cover 8.See also Fig. 4, in second embodiment of the present utility model, the above-mentioned described valve body of this seal ball-valve, valve, valve rod, valve bonnet, valve gap, the structure of valve rod driving device and bellows arrangement is constant, just, the outer circumferential face of the projecting ring section of described valve gap 5 is provided with the annular groove that a shoulder 27 and is positioned at the shoulder front portion, in addition, ball valve also comprises a holder 9, one spring fastener 28 and a thermal insulating pad 29, wherein, described holder 9 is ring dishes of a band center hole, and it can be set on the valve gap 5 and be positioned by spring secures rail to sleeper 28 on the shoulder of valve gap projecting ring section by center hole.Described thermal insulating pad 29 is installed between the apparent surface of valve gap 5 and holder 9.

In addition, between described valve body 1, valve bonnet 4 and bellows arrangement 7, form closed cavity, can fill bulking agent in the inner chamber, as oil.Can keep the lubricated situations such as antifreeze that reach.

Claims

1. seal ball-valve, comprise valve body, valve, valve rod, it is characterized in that: described valve body wall at an upper portion thereof is provided with integrally formed mounting flange, ball valve also comprises a valve bonnet, a valve rod driving device and a valve gap, described valve bonnet is a cylindrical body, be provided with a through hole in its preceding bottom, form an annular surface, in its back-end an integrally formed assembling nib on the end wall on through hole inlet side surface; Described valve gap is the pan-shaped cover of a band central shaft hole; Described valve rod driving device comprises that a driving mechanism and that valve rod is rotated is installed in rotation on the drive screw cover that also can actuate driving mechanism in the valve gap central shaft hole; Described valve bonnet is screwed on the mounting flange of valve body by its annular surface, and described valve gap is installed on the assembling nib of valve bonnet rear end with screw.

2. ball valve according to claim 1 is characterized in that: the driving mechanism of described valve rod driving device comprises gear, tooth bar and drive screw, and wherein, described gear is a cylindrical gears, and is packed on the valve rod; Described tooth bar has and the corresponding profile of tooth teeth of gear; Described drive screw is a threaded stem, one end and tooth bar termination, and the other end and drive screw cover are spirally connected, and described tooth bar teeth are meshed with gear and are connected.

3. ball valve according to claim 1, it is characterized in that: it comprises that also one is installed in the bellows arrangement between interior drive screw of valve bonnet and the drive screw cover, described bellows arrangement comprises a front head, one rear head and a bellows, described front head is the dish of band center hole, it is set in the connecting end of tooth bar and drive screw by center hole, described rear head also is the dish of band center hole, and it is set in by center hole, and drive screw puts and its edge then places the assembling nib of valve bonnet and the web of valve gap to constitute between the mating face in compacted mode.

4. ball valve according to claim 2, it is characterized in that: be formed with on the inwall of the above side of described valve bonnet through hole one with two projections of longitudinal axis opposing parallel, and constitute a chute between them, described tooth bar one side places the chute of valve bonnet slidably.

5. ball valve according to claim 1 is characterized in that: be provided with sealing gasket between the mounting flange of described valve body and the annular surface of valve bonnet.

6. ball valve according to claim 1 is characterized in that: be equipped with sealing gasket between the edge of the assembling nib of described valve bonnet and the rear head relative with it and between the edge of the platform of valve gap and the rear head relative with it.

7. ball valve according to claim 1, it is characterized in that: the rear portion of described valve gap is provided with an integrally formed projecting ring section, the central shaft hole of described valve gap is a shoulder hole, this shoulder hole is provided with internal thread at its orifice part, in addition, ball valve also comprises gland nut and some seal rings of a band center hole, wherein, gland nut is loaded on by the center hole flip sleeve that drive screw puts and is spirally connected with the internal thread of valve gap shoulder hole, and described seal ring then is assemblied in the gap between shoulder hole and the drive screw cover.

8. ball valve according to claim 1, it is characterized in that: the outer circumferential face of the projecting ring section of described valve gap is provided with the annular groove that a shoulder and is positioned at the shoulder front portion, in addition, ball valve also comprises thermal insulating pad, a holder and a spring fastener, wherein, holder is the ring dish of a band center hole, and it can be set on the valve gap and by the spring secures rail to sleeper suit and be positioned on the shoulder of valve gap projecting ring section, described thermal insulating pad is installed between the opposing side of valve gap and holder by center hole.

9. ball valve according to claim 3 is characterized in that: described bellows is to be made by stainless steel material.

10. ball valve according to claim 3 is characterized in that: form closed inner chamber between described valve body, valve bonnet and bellows arrangement, can fill bulking agent in the inner chamber, as oil.