CN201090771Y

CN201090771Y - Corrugated pipe ball valve

Info

Publication number: CN201090771Y
Application number: CNU2007200443096U
Authority: CN
Inventors: 刘锡纯
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-29
Filing date: 2007-09-29
Publication date: 2008-07-23
Anticipated expiration: 2017-09-29

Abstract

The utility model relates to a valve, in particular to a corrugated pipe ball valve which comprises a valve body, a valve cover, a valve rod, a valve rod controller, a ball body and a valve body; the valve body is fixedly connected with the valve cover; the ball body is arranged in the channel of the valve body. The utility model is characterized in that the ball valve comprises a corrugated pipe which is sleeved on the part of the valve rod that is extended into the valve body; one end of the corrugated pipe is in sealed and fixed connection with the surface of the valve rod, while the other end is in sealed fixation with the valve cover. Such a structure has the corrugated pipe arranged on the valve rod to construct a static sealing, together with the traditional dynamic sealing, a two-grade sealing is structured; a worm reducer is adopted to control the valve rod; the joint part between the valve rod and the ball body adopts a structure in which a spiral cam slot is matched with a poke pin, so that the operational property of the product is greatly improved; meanwhile, the control becomes more convenient.

Description

Bellows ball valve

Technical field

The utility model relates to a kind of valve, especially a kind of bellows ball valve.

Background technique

Present ball valve comprises valve body, valve gap, valve rod, valve rod controller, spheroid.The inner steel ball with holes of valve gap and valve body fixing ball valve, the surface is very bright and clean, both sides generally are the Sealings of teflon, with the spheroid contact segment be arc surface, compress the generation seal action by bolt on the valve body or nut, a straight trough is opened at the top of spheroid, is used to transmit the torsion of handle.During valve open, the effect by valve rod makes the hole on the spheroid and the axis parallel of valve, forms a passage; During valve closing, by valve rod with the spheroid half-twist, with carrier frequency channel break.Switch generally has manual mode and mode such as pneumatic or electronic.

Above-mentioned structure, valve rod and extraneous not completely cutting off are because stuffing box partly is the motive sealing that valve rod, filler and Gland reach, and cause the leakage of valve stem part easily.

Summary of the invention

The purpose of this utility model is, a kind of good airproof performance, easy to operate, the bellows ball valve being convenient to control are provided.

The utility model is realized by following scheme: a kind of bellows ball valve comprises valve body, valve gap, valve rod, valve rod controller, spheroid.Valve body is fixedlyed connected with valve gap, spheroid is positioned at the passage of valve body, it is characterized in that also comprising bellows at described bellows ball valve, and bellows is enclosed within valve rod and stretches on the interior part of valve body, one end and stem surface seal weld are connected and fixed, and the other end is fixed on the valve gap hermetically.

This is arranged on and is provided with bellows on the valve rod, make valve rod medium and isolation, avoided medium to reveal to the external world, owing to adopted bellows from valve stem part, so the motion of valve rod moves up and down, meet the structural principle that bellows can only stretch and compress.

Of the present utility modelly further be set to: an end that stretches into valve body of described valve rod is provided with a spiral helicine cam path, and the position relative with the cam path position, spheroid top is provided with finger, and finger stretches in the cam path.

This is provided with the structure that adopts finger to cooperate with spiral helicine cam path, and such structure is easy for installation, and finger can rotate 90 and spends unlatching or closing passage when the moving up and down of cam path.

Of the present utility modelly further be set to: the valve rod controller is a worm speed reducer.

This is provided with and adopts worm speed reducer as the valve rod controller, because the deceleration characteristic of worm speed reducer can make valve rod move up and down, has further improved the operability of bellows ball valve, and has controlled very convenient.

Said structure is provided with bellows as a kind of static seal on valve rod, add traditional motive sealing, forms the two-stage sealing.And having adopted worm speed reducer control valve rod, the structure in that the connecting part of valve rod and spheroid adopts spiral helicine cam path to cooperate with finger has again improved the operability of product greatly, and controls more convenient.

Description of drawings

Fig. 1 partly cuts open figure for present embodiment;

Embodiment

With reference to figure 1 as can be known, bellows ball valve comprises valve body 3, valve gap 4, valve rod 7, spheroid 2, spheroid 2 is arranged in the valve body 3, be provided with Sealing 1 between spheroid 2 and the valve body 3, Sealing 1 is an arc with the connecting part of spheroid 2, improve sealing, valve gap 4 is fixed on the valve body 3, pass through bolt, also be fixed with a support 5 on valve gap 4, worm speed reducer 8 is arranged on the side, the top of support 5, and output terminal and valve rod 7 are connected, be convenient to operation, valve rod 7 passes support 5, valve gap 4, valve body 3 and is connected with spheroid 2.

The valve rod controller can have a lot of modes in the utility model, can as long as can control the switch that valve rod 7 moves up and down, manual or pneumatic can the employing, it is in order to make whole ball valve have better operability and controlled that present embodiment adopts worm speed reducer 8.

On valve rod 7, be provided with a bellows 6, bellows 6 one ends are welded on valve rod 7 and stretch on the part of valve body and be welded on the surface of valve rod 7, constitute the fixedly connected of sealing, the other end and valve gap 4, support 5 are fixed together, just valve rod 7 has been hedged off from the outer world so, reaches a good sealing effect; And be provided with a spiral helicine cam path 71 at the end of valve rod 7, and be provided with finger 21 at spheroid 2 tops, finger 21 stretches in the cam path 71.

The length of the utility model convexity race 71 is to be provided with according to the angle that spheroid 2 rotates up and down in valve body 3, and spheroid 2 is provided with a restraining groove 22 on the moving direction of valve rod 7, guarantee that valve rod 7 can only move up and down, when moving to the limit position of restraining groove 22, protruding turn trough 71 just in time makes finger 21 turn to moving spheroid 2 to revolve and turn 90 degrees.

When worm speed reducer 8 rotations moved down valve rod, protruding turn trough 71 drove fingers 21 and rotates, and when valve rod 7 moved down into the limit position of restraining groove 22, spheroid 2 just in time rotated 90 degree, opens bellows ball valve; Make when moving on the valve rod when worm speed reducer 8 rotates, protruding turn trough 71 drives fingers 21 and rotates, and makes spheroid 2 rotate 90 degree, closes bellows ball valve.

Claims

1. bellows ball valve, comprise valve body, valve gap, valve rod, valve rod controller, spheroid, valve body is fixedlyed connected with valve gap, spheroid is positioned at the passage of valve body, it is characterized in that also comprising bellows at described bellows ball valve, bellows is enclosed within valve rod and stretches on the interior part of valve body, and an end and stem surface are sealedly and fixedly connected, and the other end is fixed on the valve gap hermetically.

2. according to the described bellows ball valve of claim 1, it is characterized in that an end that stretches into valve body of described valve rod is provided with a spiral helicine cam path, the position relative with the cam path position, spheroid top is provided with finger, and finger stretches in the cam path.

3. according to claim 1 or 2 described bellows ball valves, it is characterized in that described valve rod controller is a worm speed reducer.