Double-elasticity high-temperature-resistant high-pressure-resistant bidirectional sealing double-eccentric hard sealing butterfly valve

Abstract

The invention discloses a double-elasticity high-temperature-resistant high-pressure-resistant bidirectional sealing double-eccentric hard sealing butterfly valve, and relates to the field of valve. The butterfly valve comprises a valve body, a valve rod and a butterfly plate, wherein the valve rod penetrates through the butterfly plate and is rotationally arranged on the valve body; a positioningstep, a valve seat, a check ring and a fixing ring are sequentially arranged on the inner wall of the valve body; an elastic sealing groove is formed in the side, close to the check ring, of the valve seat; an adjusting gap X is formed between the valve seat and the check ring; a butterfly plate matched with the valve seat is fixed to the valve rod; a pressing plate ring is arranged at the end, deviating from the valve rod, of the butterfly plate; a butterfly plate sealing ring is embedded between the butterfly plate and the pressing plate ring; the butterfly plate sealing ring comprises a clamping part and a bowl-shaped elastic sealing component arranged on the outer ring of the clamping part; the clamping part is arranged between the butterfly plate and the pressing plate ring; the outer side face of the bowl-shaped elastic sealing component is an outer cone sealing face; a limiting boss is arranged on the side, close to the butterfly plate sealing ring, of the butterfly plate; andan adjusting gap Y is formed between the limiting boss and the end of the bowl-shaped elastic sealing component. The butterfly valve has the advantages of being capable of achieving bidirectional sealing and long in service life.

Description

technical field [0001] The invention relates to the field of valve equipment, in particular to a double eccentric hard seal butterfly valve. Background technique [0002] With the deepening of national infrastructure construction, the demand for sand is huge. In addition, with the strengthening of environmental protection awareness, human beings have realized that sand and gravel are a kind of non-renewable natural resources, and it is impossible to take sand from rivers without limit. , and with the rapid development of concrete technology, modern concrete has higher and higher technical requirements for sand and gravel, and there are fewer and fewer natural sand and gravel that can meet its requirements. Therefore, machine-made sand and gravel have become the main source of sand for construction in my country. In the way of machine-made sand, dry sand-making is not limited by water sources and the environment, and the stone powder produced in the production process can be u...

AI Technical Summary

Problems solved by technology

In the way of machine-made sand, dry sand-making is not limited by water sources and the environment, and the stone powder produced in the production process can be used reasonably, thus saving water resources and mineral resources to a certain extent, and there is no sewage and sludge It is more environmentally friendly than the wet production line, so it has become the mainstream sand making method at present, but the existing dry sand making equipment has the problems of low production efficiency and poor screening quality

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