A long-life butterfly valve

Abstract

The invention discloses a long-life butterfly valve, which comprises a valve body, and the valve body is provided with passages penetrating left and right. Cone hole; the side wall of the valve body is rotatably connected with a valve stem whose lower end extends into the passage, and the passage is rotatably connected to the shaft directly below the valve stem; the valve stem is provided with an upper bump on the side near the lower end , the shaft rod is provided with a lower bump on the side near the upper end, and a valve block is rotatably connected between the upper bump and the lower bump; the two sides of the valve block are symmetrically provided with a first sealing cone surface and a second Two sealing cone surfaces, the first sealing cone surface is provided with a first sealing ring, the second sealing cone surface is provided with a second sealing ring; the valve stem is internally connected with an adjustment rod, and the adjustment rod The lower end of the butterfly valve extends into the channel, and a transmission assembly is arranged between the valve block and the lower end of the regulating rod; the butterfly valve is not only simple in structure, but also easy to replace the sealing ring of the valve block.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, in particular to a long-life butterfly valve. Background technique [0002] The butterfly valve is mainly composed of a valve body, a valve stem, a butterfly plate and a valve seat. The valve body is cylindrical with a short axial length, and the disc plate is located in the valve body. When working, the butterfly plate is driven by the valve stem. If it is turned 90°, it can complete one opening and closing, and the flow of the medium can be controlled by changing the deflection angle of the butterfly plate. At present, butterfly valves are mainly used in engineering systems such as petroleum, chemical industry, hydropower, water supply and drainage, smelting, energy, generators, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, building water supply and drainage, etc. It is used to regulate and cut o...

AI Technical Summary

Problems solved by technology

Since the butterfly plate is worn by the repeated extrusion and friction of the sealing seat during the opening and closing operation, the sealing effect between the sealing seat and the butterfly plate is obviously reduced after a period of use, and leakage begins to occur, which is easy to be damaged, and any replacement Each part is relatively cumbersome; how to prolong the service life of the butterfly valve is the main problem that has been sought to be solved in this technical field for many years

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