Novel cock valve

Abstract

The invention discloses a cock valve good in airtightness and not prone to rusting. According to the technical scheme, the novel cock valve comprises a valve body; a cylindrical cock is arranged in the middle of the valve body, a cavity is formed in the upper side of the cylindrical cock, and the cylindrical cock is tightly connected with the cavity. The outer wall of the cavity is made of rubber, a valve rod connected with the cylindrical cock is arranged in the cavity, and the valve rod is sleeved with a pushing rod; the pushing rod is connected with a bonnet through threads; the valve rod is connected with a power mechanism; an oil injection nozzle is arranged on the upper portion of the cavity, a spiral groove is formed in the outer wall of the cavity, and the oil injection nozzle stretches into the spiral groove. According to the novel cock valve, the pushing rod enters the cavity to enable the cavity to expand and make tight contact with the valve body; the spiral groove formed in the outer wall of the valve body is filled with oil agents which can effectively prevent the valve body from rusting, and the service life of the cock valve is prolonged.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a plug valve. Background technique [0002] Plug valves are widely used in various industries, especially in various heavy industries and chemical industries. By rotating 90 degrees, the channel port on the valve plug communicates with or separates from the channel port on the valve body to realize opening or closing. Ordinary plug valves have poor sealing at the joint of the valve plug, which may easily cause gas or liquid leakage, and cannot meet the production and use requirements. The invention patent with the Chinese patent number ZL2014108388922 discloses a technical solution to the above technical problems, namely: a plug valve, including a valve body, the upper and lower ends of the valve body are provided with valve covers, and the middle part of the valve body There is a cylindrical cock, and there is a cavity above the cylindrical cock. The outer wall of the cavity is ...

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Problems solved by technology

[0003] However, in actual use, there are many defects in the above-mentioned technical solution. For example, the outer wall of the cavity is made of rubber material, and the friction between the rubber material and the valve body will be very large, which will lead to the need to make the piston When descending, it is necessary to use a very large force to overcome the friction between the rubber and the valve body. In addition, because most of the valve bodies are made of metal, in actual use, the seal between the valve body and the valve plug may be broken. rust, which makes the valve plug more difficult to rotate, the above technical solutions still cannot solve these problems

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