CN2419432Y

CN2419432Y - Self lubricating plug valve with hard seal

Info

Publication number: CN2419432Y
Application number: CN 00216980
Authority: CN
Inventors: 方存正; 刘德银; 李国华; 陆兴华
Original assignee: FANGZHEN VALVE PLANT ZHEJIANG PROV
Current assignee: FANGZHEN VALVE PLANT ZHEJIANG PROV
Priority date: 2000-03-22
Filing date: 2000-03-22
Publication date: 2001-02-14
Anticipated expiration: 2010-03-22

Abstract

The utility model relates to a hard seal plug cock valve, which mainly comprises a valve body, a plug cock body, a valve cover, a valve rod, a stop block, a sealing member and an installing member. The utility model is mainly characterized in that a lubricating channel is arranged on the plug cock body, and the lubricating channel is communicated with an oil filling port by an oil filling valve. The utility model has the advantages of small opening and closing friction, reliable sealing performance, long lifespan, etc. The utility model can be suitable for being used under high pressure operating conditions.

Description

Hard sealing self lubricating plug valve

The utility model relates to a kind of valve, specifically about a kind of hard sealing stopcock.

Stopcock when opening on the little fluid-transporting tubing that is widely used in every profession and trade of the flow resistance of medium, mainly by two kinds of hard sealing stopcock and soft seal stopcocks.Hard sealing stopcock mainly is made of valve body, faucet body, valve gap, valve rod, Sealing and assembling set, and complete mechanical seals firmly between its faucet body and the valve body, and the operating mode that can be suitable for higher temperature is used.But, the hard sealing stopcock of this structure, the area of contact between its faucet body and the valve body is big, and keying frictional force and moment of torsion are big, can only be suitable for the low pressure operating mode and use.And the wearing and tearing between sealing surface are big in the opening-closing process, and its sealability will obviously descend after use a period of time, even occur leaking, and sealability is unreliable, and working life is short.

The purpose of this utility model is a kind of keying frictional force of design and moment of torsion is little, wearing and tearing are little between sealing surface, sealability reliable, long service life, and can be applicable to the hard sealing self lubricating plug valve of high pressure operating mode.

The technological scheme that realizes the utility model purpose mainly comprises valve body, faucet body, valve gap, valve rod, limiting stopper, Sealing and assembling set, is shaped on lubrication channel on faucet body, and this lubrication channel is communicated with pouring orifice by fuel feeding valve.

The utility model beneficial effect compared with prior art is to be shaped on the faucet body lubrication channel, make valve realize machinery and grease double seal, simultaneously, because the injection of lubricant oil, reduced the keying frictional force between faucet body and the valve body sealing surface, reduce the wearing and tearing that open and close between moment and the sealing surface, its sealability is reliable, long product lifecycle, and can be suitable for the use of high pressure operating mode.

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

Now further describe the technical solution of the utility model in conjunction with the accompanying drawings and embodiments.

Hard sealing self lubricating plug valve as shown in Figure 1 mainly comprises valve body 1, faucet body 2, valve gap 5, valve rod 11, limiting stopper 8, Sealing and assembling set.

Be shaped on lubrication channel 14 on the faucet body 2, this lubrication channel 14 is distributed in the surface of faucet body 2, and is communicated with pouring orifice 13 by fuel feeding valve 12.Fuel feeding valve 12 centers of being contained in are shaped in the depression bar 10 of through hole, and depression bar 10 is contained in the center of valve rod 11 by screw thread.On fuel feeding valve 12 outlet passages double check valve 9 is housed, the outlet of double check valve 9 is communicated with the lubrication channel 14 of faucet body 2.

Gasket seal 3 is housed between valve gap 5 and the valve body 1 and adjusts packing ring 4.Upside at valve gap 5 is equipped with stuffing box packing 6, and sealing filler 6 is fastening by gland 7.There is a hook groove gland 7 upper ends, and limiting stopper 8 is fixedly installed in the hook groove.

Claims

1, a kind of hard sealing self lubricating plug valve, mainly comprise valve body (1), faucet body (2), valve gap (5), valve rod (11), limiting stopper (8) and Sealing and assembling set, it is characterized in that being shaped on the described faucet body (2) lubrication channel (14), this lubrication channel (14) is communicated with pouring orifice (13) by fuel feeding valve (12).

2, hard sealing self lubricating plug valve according to claim 1 is characterized in that described valve gap (5) upper and lower sides is respectively equipped with gasket seal (3) and stuffing box packing (6).

3, hard sealing self lubricating plug valve according to claim 1 and 2 is characterized in that described limiting stopper (8) is fixedly mounted in the hook groove of gland (7).

4, hard sealing self lubricating plug valve according to claim 3 is characterized in that described fuel feeding valve (12) center of being contained in is shaped in the depression bar (10) of through hole, and depression bar (10) is fixedly mounted on the center of valve rod (11) by screw thread.

5, hard sealing self lubricating plug valve according to claim 4 is characterized in that on the outlet passage of described fuel feeding valve (12) double check valve (9) being housed, and the outlet of double check valve (9) is communicated with lubrication channel (14).