CN2338548Y

CN2338548Y - Cock valve

Info

Publication number: CN2338548Y
Application number: CN 98229184
Authority: CN
Inventors: 王硕明; 钟慧容
Original assignee: Individual
Current assignee: Zhong Huirong
Priority date: 1998-07-27
Filing date: 1998-07-27
Publication date: 1999-09-15
Anticipated expiration: 2008-07-27

Abstract

The utility model discloses a cock valve, which is mainly composed of a valve body, an upper valve cover, and cock bodies which are assembled inside the valve body. The upper and lower ends of the cock bodies are provided with balls; inner walls of the valve body are provided with sebaceous ring grooves; the inner part of the lower valve cover is provided with deciliter mechanisms of cams, and good sealing performance of the cock valve can be ensured under the working environments with middle and high pressure. The utility model has the advantages of fast opening, labor and time saving, and convenient operation and management. In particular, the utility model is suitable for controlling pipelines of situations of the middle and high pressure environments of petrochemical industry departments.

Description

Stopcock

The utility model relates to a kind of valve, and specifically a kind of stopcock particularly is applicable to the middle and high pressure stopcock of departments such as oil, chemical industry.

We know: valve is the important control parts of pipe-line system, in industry, agricultural and people's daily life, use very extensive, for adapting to the needs of different occasions, at present, the structural type of valve is numerous, and the most representative stopcock with its compact structure, good seal performance, unlatching quick (only needing rotation 90 degree), flow resistance is little and realize remarkable advantage such as automation control easily, receive praises from customers, enjoy expert's high praise, as far back as the eighties, valve expert both domestic and external just once foretold, " direction of valve development is a stopcock ".Stopcock mainly is made of valve body and the faucet body that is installed in the valve body, and faucet body and valve interior wall are realized sealing with fitting tightly of the conical surface, and stopcock has following characteristics: manufacture the required precision height, otherwise can not realize sealing; It is big to open moment during work, faucet body and the valve interior wall bad sealability that influences of fitting, fit and closely make pivoting friction torque increase severely again, open effort, being prone to jam pulls, because These characteristics, just present, China can only produce the following low pressure stopcock of 1.6MPa, for reducing to open moment, the faucet body of the stopcock of being produced and valve interior wall keep certain matching gap, utilize self pressure of pipeline internal medium to act on faucet body and fit tightly with valve interior wall and realize that the downstream seals.And the middle and high pressure workplace more than 1.6MPa, medium in the pipeline is very big to the pressure of faucet body and valve interior wall formation, the friction torque of rotating stopcock increases severely, the operation effort is time-consuming, (for example: worm gearing) open stopcock must be equipped with boosting mechanism, but adopt worm-and-wheel gear to lose stopcock again and open advantage efficiently, and complex structure, increased manufacturing cost, and pull faucet body surface engagement precision easily, reduce working life, increase the maintenance management expense.

The purpose of this utility model be on the prior art basis, propose a kind of simple and compact for structure, manufacturing cost is low, can be applicable to middle and high pressure working environment, have good sealability, and open the stopcock of convenient power-saving.

The purpose of this utility model is achieved by the following technical solution.

A kind of stopcock, it is mainly by valve body, bonnet and the faucet body that is fitted in the valve body constitute, ball and pressing plate are equipped with in the faucet body upper end, the spring that is set on the valve rod of faucet body places on the pressing plate, the inwall of valve body has been done the grease annular groove, inject grease and can play the lubrication protection effect the faucet body surface, the faucet body lower end is equiped with ball and press table, can reduce pivoting friction torque, the lower end of valve body is equipped with bottom flange, and camshaft and cam are installed in the bottom flange, when need are opened stopcock, the rotating cam axle makes the cam jack-up faucet body that makes progress, and rotation valve rod is opened stopcock like a cork; When need were closed, rotation valve rod was to closed position, rotating cam axle again, and faucet body resets under spring action and can realize sealing.

Faucet body upper and lower end device of the present utility model has ball, can reduce pivoting friction torque; Camshaft and cam are installed in bottom flange, the rotating cam axle, can make the cam jack-up faucet body that makes progress, can rotate faucet body like a cork and open stopcock, go back to camshaft again, faucet body resets under spring action can realize good sealing, and the utility model is novel rational in infrastructure, open laborsaving easy to operately, be particularly suitable for middle and high pressure workplace and have good sealability.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing the utility model is further described:

A kind of stopcock, it is mainly by valve body 7, the bonnet 4 that is connected in valve body 7 by bolt 5 constitutes with the faucet bodies 20 that are fitted in the valve body 7, be filled with stuffing box packing 3 in the bonnet 4, gland 2 is installed on the bonnet 4, valve body 7 has been made adpting flange 18, import 17 and outlet 9 have been done in it, ball 21 and pressing plate 6 are equipped with in faucet body 20 upper ends, the spring 22 that is set on the valve rod 23 of faucet body 20 places on the pressing plate 6, faucet body 20 lower ends are equiped with ball 16 and press table 11, can reduce the pivoting friction torque of faucet body 20, the inwall of valve body 7 has been done grease

annular groove

8,10, inject grease by pump nozzle and can play the lubrication protection effect faucet body 20 surfaces, can further reduce pivoting friction torque, the lower end of valve body 7 is equipped with bottom flange 12, camshaft 14 and cam 13 are installed in the bottom flange 12, it is work like this: when need are opened stopcock, square toes 15 with handle rotating cam axle 14, make upwards jack-up faucet body 20 of cam 13, at this moment faucet body 20 increases with the gap of valve body 7 inwalls, use the square toes 1 of handle rotation valve rod 23 again, rotation valve rod 23 is to the enable possition like a cork, make the import 17 of valve body 7, outlet 9 through holes 19 by faucet body 20 are connected, and promptly finish the open operation of stopcock; When need were closed, rotation valve rod 23 was to closed position, and the rotating cam axle 14 again, and faucet body 20 resets under spring 22 effects can realize sealing.

Claims

1. stopcock, it mainly is made of valve body (7), bonnet (4) and the faucet body (20) that is fitted in the valve body (7), it is characterized in that on the faucet body (20) ball (21) and pressing plate (6) being housed, the spring (22) that is set on the valve rod (23) of faucet body (20) places on the pressing plate (6), the inwall of valve body (7) has been done grease annular groove (8,10), faucet body (20) lower end is equiped with ball (16) and press table (11), the lower end of valve body (7) is equipped with bottom flange (12), and camshaft (14) and cam (13) are installed in the bottom flange (12).