CN2547968Y

CN2547968Y - Top-mounted oblique ball valve

Info

Publication number: CN2547968Y
Application number: CN 02220784
Authority: CN
Inventors: 张逸芳; 陆平
Original assignee: Jiangsu Shentong Valve Co Ltd
Current assignee: Jiangsu Shentong Valve Co Ltd
Priority date: 2002-05-23
Filing date: 2002-05-23
Publication date: 2003-04-30
Anticipated expiration: 2012-05-23

Abstract

The utility model provides a top-mounted oblique ball valve which comprises a valve body, a valve cover, an oblique ball body with a handle, an obturating ring, a gland cover, a limited plate, an arresting pin, a pretightening force adjusting plate and a pretightening spring, etc.; the utility model is characterized in that the pretightening spring can not be eroded by medium; the sealing load is convenient for adjustment; the ball body and the valve lever are of anintegrated structure; a mechanical limit is arranged on the ball valve body, the utility model is convenient in on-site maintenance, assembly and disassembly, simple in structure and low in cost.

Description

A kind of dress formula beveled ball valve of going up

The utility model relates to a kind of last dress formula beveled ball valve that is used for industries such as nuclear power, petrochemical industry, electric power, metallurgy, municipal administration.

At present, industrial employed beveled ball valve, preloading spring is arranged between valve rod step and the spheroid, directly contact with Korrosionsmedium, easily be corroded, working life is short, and spheroid separates with valve rod, dismounting difficulty when safeguarding on pipeline, mechanical position limitation is arranged on the drive unit, is difficult for distinguishing the switching position of ball valve during on-the-spot more changing device.

The purpose of this utility model is to provide a kind of preloading spring not to be subjected to dielectric corrosion, and seal pressure is easy to adjust, spheroid and valve rod integral type, mechanical position limitation is arranged on the ball valve body, safeguards easy accessibility at the scene, and cost is low, last dress formula beveled ball valve simple in structure.

The technical solution of the utility model is: dress formula beveled ball valve is made up of component such as valve body, valve gap, limiting board, position limit pin, pretightening force regulator plate, preloading spring, sealing gland, stuffing box gland, O shape circle, seal ring, band handle inclined-plane spheroids on this, band handle inclined-plane spheroid, seal ring are housed in the valve body, seal ring can adopt rubber, also can adopt rubber to coat tetrafluoroethylene, be suitable for multiple medium; Stuffing box gland, sealing gland, preloading spring, pretightening force regulator plate, O shape circle, limiting board, position limit pin are housed in the valve gap.Valve body, valve gap connect by double-screw bolt, nut, sealing gland and valve gap inner chamber compress stuffing box gland by scyewed joint, preloading spring is between valve rod step and pretightening force regulator plate, be on the stuffing box gland, do not contact with medium, pretightening force regulator plate and valve gap inner chamber are regulated seal pressure by scyewed joint by screwing in or screw out the pretightening force regulator plate.Limiting board connects by square tenon with valve rod, and is arranged on (being on the body) in the valve gap, is applicable to multiple connecting mode, is easy to debate the switching position of other valve at the scene during exchange apparatus.

Owing to adopted above technological scheme, solved existing beveled ball valve preloading spring easily by dielectric corrosion, working life is short, is difficult for distinguishing defect such as valve switch position, dismounting inconvenience, cost height at the scene during exchange apparatus.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the plan view of Fig. 1

Wherein: 1, limiting board; 2, pretightening force regulator plate; 3, preloading spring; 4, sealing gland; 5, stuffing box gland; 6, O shape circle; 7, valve gap; 8, thrust pad; 9, seal ring; 10, band handle inclined-plane spheroid; 11, valve body; 12, position limit pin.

As shown in Figure 1, band handle inclined-plane spheroid 10 is housed in the valve body 11, seal ring 13, stuffing box gland 5 is housed in the valve gap 7, sealing gland 4, preloading spring 3, pretightening force regulator plate 2, O shape circle 6, limiting board 1, position limit pin 12, preloading spring 3 is positioned on the stuffing box gland 5, do not contact with medium, regulate seal pressure by the screw-in depth that changes pretightening force regulator plate 2, limiting board 1 is positioned at valve gap 7, connect by square tenon with valve rod, Fig. 1 position ball valve is in opening state, and when the spheroid 10 that turns clockwise, spheroid drives limiting board 1 together during half-twist, when limiting board 1 contacts with position limit pin 12, ball valve is closed.

The utility model can adopt various ways with being connected of pipeline: flange connection, internal and external threads connection, butt welding connection etc., present embodiment are that butt welding connects.

In sum, the utility model compared with prior art mainly has the following advantages:

1, seal pressure is easy to adjust;

2, preloading spring is not subjected to dielectric corrosion, long service life;

3, mechanical position limitation is arranged on the body, and the scene more can pick out the valve switch position during changing device easily

Put;

4, spheroid and valve rod integral type, on-the-spot easy accessibility;

5, simple in structure, cost is low.

Claims

1, a kind of dress formula beveled ball valve of going up, comprise parts such as valve body, valve gap, limiting board, position limit pin, pretightening force regulator plate, preloading spring, sealing gland, stuffing box gland, O shape circle, seal ring, band handle inclined-plane spheroid, it is characterized in that: preloading spring is positioned on the stuffing box gland, does not contact with medium.

2, according to the described dress formula beveled ball valve of going up of claim (1), it is characterized in that the inclined-plane spheroid is band handle spheroid, promptly valve rod and spheroid are integral type.

3, according to claim (1) or (2) described dress formula beveled ball valve of going up, it is characterized in that mechanical position limitation is arranged on the body, is applicable to multiple driving mode.

4, according to claim (1) or (2) described dress formula beveled ball valve of going up, it is characterized in that seal ring adopts rubber, also can adopt rubber to coat tetrafluoroethylene.