CN2854250Y - Plug valve - Google Patents

Abstract

The utility model relates to a plug valve whose structure mainly which comprises valve body, top valve cap and plug arranged in valve body. Ball bearings are arranged on top end and bottom end of plug. Transverse through hole is drilled on plug. Internal wall of valve body is provided with grease collar groove. Cam coupling mechanism is arranged on bottom valve cap. The utility model offers fine sealing performance in medium and high pressure working environment. The utility model has the advantages of simple structure, easy opening, energy and time saving and is especially suitable for pipeline control in medium and high pressure working environment of petrochemical industry.

Description

A kind of stopcock

Technical field

The utility model relates to a kind of valve, particularly a kind of middle and high pressure stopcock that is applicable to industries such as petrochemical industry.

Background technique

Valve is the important control parts of pipe-line system, uses very extensive in industrial and agricultural production and people's daily life.For adapting to the needs of different occasions, the structural type of valve is numerous, and the most representative stopcock with its compact structure, closed performance is good, unlatching is quick, flow resistance is little and realize remarkable advantages such as automation control easily, receives praises from customers, and uses more extensive.Stopcock mainly is made of valve body and the faucet body that is installed in the valve body, faucet body and valve interior wall are realized sealing with fitting tightly of the conical surface, stopcock is manufactured the required precision height, otherwise can not realize sealing, and unlatching moment is big during work, faucet body and valve interior wall are fitted bad, influence sealability, body closes closely, makes rotation friction increase severely again, open effort, be prone to jam and pull.Because These characteristics, to at 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, and the operation effort is time-consuming, and the equipped boosting mechanism of palpus (for example: worm gearing) open stopcock.But adopt worm-and-wheel gear to lose stopcock again and open advantage efficiently, and complex structure, increased manufacture cost, also can reduce working life, increase the maintenance management expense.

Summary of the invention

The purpose of this utility model provide 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.

Realize that the technological scheme that the purpose of this utility model is taked is such.A kind of stopcock, 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 is provided with the grease annular groove, inject grease and can play the lubrication protection effect the faucet body surface, faucet body has cross through hole, and ball and press table are equipped with in the faucet body lower end, can reduce pivoting friction torque, the lower end of valve body is equipped with bottom flange, camshaft and cam are installed in the bottom flange, when need are opened stopcock, the rotating cam axle, make the cam jack-up faucet body that makes progress, 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.

At faucet body upper and lower end of the present utility model ball is housed, 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, rotation valve rod is opened stopcock like a cork, goes back to camshaft again, and faucet body resets under spring action can realize good sealing.

The technological progress that the utility model is obtained is: it is rational in infrastructure, unlatching is laborsaving, easy to operate, is applicable to the piping sealing of height, middle pressure workplace.

Description of drawings

What Fig. 1 provided is structural representation of the present utility model.

The implication of each label representative is among the figure:

1. gland 3. stuffing box packing 4. bonnets 5. bolts 6. pressing plates 7. valve bodies 8. grease annular grooves 9. export 10. grease annular grooves, 11. press tables, 12. bottom flanges, 13. cams, 14. camshafts, 15. camshaft square toes, 16. balls, 17. imports, 18. adpting flanges, 19. through holes, 20. faucet bodies, 21. balls, 22. springs, 23. valve rods on the valve rod square toes 2..

Embodiment

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

See shown in the accompanying drawing 1; 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 is provided with adpting flange 18; have import 17 and outlet 9 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 has cross through hole 19; 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 is provided with 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, and camshaft 14 and cam 13 are installed in the bottom flange 12.

The working procedure of stopcock of the present utility model is such: 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 connected the import 17 of valve body 7, outlet 9 cross through hole 19 by faucet body 20 to the enable possition like a cork, promptly finishes 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)

1, a kind of stopcock, comprise valve body (7), bonnet (4) in the structure and be fitted to the interior faucet body (20) of valve body (7), it is characterized in that on the faucet body (20) ball (21) and pressing plate (6) being housed, faucet body (20) has cross through hole (19), 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) is provided with grease annular groove (8), (10), faucet body (20) lower end is equipped with bottom flange (12), and camshaft (14) and cam (13) are installed in the bottom flange (12).