Automatic filling sealing structure for high-pressure valve

Abstract

The invention relates to an automatic filling sealing structure for a high-pressure valve, which comprises a valve rod filling box body, a valve rod, a filling assembly and a support plate, wherein a difference pressure ring block in a step shaft sleeve structure is coaxially arranged on the valve rod arranged between the support plate and the filling assembly in the filling box body, a gap is formed between the upper plane of the step of the difference pressure ring block and the radial matched surface made in the filling box body, a waveform elastic element is coaxially pressed on the valverod arranged between the difference pressure ring block and the support plate, the filling assembly is coaxially arranged on the valve rod arranged in the filling box body at the inner side of the difference pressure ring block and sequentially comprises a filling pad, woven forming fillings, a filling separation sleeve and forming press ring fillings from top to bottom, the woven forming fillings, the filling separation sleeve and the forming press ring fillings are fixedly assembled. The sealing can be automatically formed under the medium pressure effect, the structure is simple, the effect is obvious, the sealing reliability of the movable sealing position of the valve rod is greatly improved, the filling abrasion can be automatically compensated through the structure, and the sealingpressure of the fillings in the use process is maintained.

Description

technical field [0001] The invention belongs to valves, and relates to a high-pressure valve, in particular to an automatic packing and sealing structure of a high-pressure valve. Background technique [0002] As people's awareness of safety and environmental protection continues to increase, the requirements for the discharge of toxic, harmful, flammable and explosive media in petroleum, chemical and other special industries are becoming more and more stringent. The valves in the device play an important role in controlling the leakage and discharge of toxic, harmful, flammable and explosive media in the device, especially for valves used in high-pressure fields, such as high-pressure flat gate valves, high-pressure globe valves and high-pressure wedge gate valves etc. Valves with low leakage and good sealing performance can effectively avoid fires, explosions, poisoning and other accidents that endanger life and property safety due to medium leakage due to poor valve packi...

AI Technical Summary

Problems solved by technology

The reliability of this sealing structure is poor, the greater the pressure on the valve, the greater the force on the external bolts and nuts, the greater the possibility of mechanical seal failure and seal leakage

Moreover, the packing is easy to loosen and leak during use, so the sealing parts need frequent maintenance and overhaul, posing potential safety hazards

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