Method for manufacturing rubber-lined butterfly valves
A manufacturing method, technology of butterfly valves, applied in the direction of lift valves, valve devices, engine components, etc.
Inactive Publication Date: 2010-08-25
TIELING SPECIAL VALVE
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- Description
- Claims
- Application Information
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Problems solved by technology
In the prior art, there is no method for making a fully rubber-lined butterfly valve that combines rubber layers on the surface of the valve inner cavity and the front and rear surfaces of the butterfly plate of the cast butterfly valve
Method used
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[0032] The production method of the rubber-lined butterfly valve has the following steps:
[0033] First cast the valve body and butterfly plate, make the valve shaft, make the valve shaft seat on the cast valve body and the cast butterfly plate, make the sealing ring seat on the cast valve body and the cast butterfly plate, and make the cylindrical surface shape of the valve inner cavity The inner surface and the surface of the seat hole of the valve shaft are sandblasted, and the vulcanized composite rubber layer is molded on the cylindrical inner surface of the valve body cavity and the surface of the seat hole of the valve body with the individual vulcanization mold of the valve body and the mixed rubber sheet. Install the sealing ring on the casting valve body and the sealing ring seat on the casting butterfly plate and assemble the butterfly valve; or cast the valve body and butterfly plate first, make the valve shaft, and make the valve shaft seat on the casting valve bo...
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The invention provides a method for manufacturing rubber-lined butterfly valves. The method comprises the following steps that: a valve body and a butterfly plate are cast; a valve shaft is manufactured; a valve shaft seat and a sealing ring seat are manufactured on the cast valve body and the cast butterfly plate; rubber layers are compounded on the cylindrical inner surface of a valve-body innercavity, the front and back surfaces of the cast butterfly plate by use of a valve-body individual vulcanization die with a shape follow-up partitioning-pressing die; during vulcanization, after a dieis locked, a regulating bolt is first screwed, and then the shape follow-up partitioning-pressing die presses mixed films on the surface of a cast part which is not very regular in surface, complex in surface shape and big in individual difference after casting; when the mixed film which is heated to be 20 and 30 DEG C lower than a vulcanization temperature is softened to have certain fluidity, the regulating bolt is further screwed so as to ensure that the shape follow-up partitioning-pressing die more tightly presses the mixed films on the surface of the cast part; after the mixed films areheated to be vulcanized and the temperature is kept during vulcanization, the butterfly plate which is compounded with the rubber layers, uniform in compounding layer and high in bonding strength canbe obtained; and after the butterfly plate is assembled into a butterfly valve, an all-rubber-lined butterfly valve is obtained.
Description
technical field [0001] The invention relates to a method for manufacturing a rubber-lined butterfly valve with a nominal diameter greater than or equal to 500 millimeters, in particular to compound rubber on the front and rear surfaces of the butterfly plate of the cast butterfly valve in the production method of a rubber-lined butterfly valve with a nominal diameter greater than or equal to 500 millimeters. layer. Background technique [0002] The production method of the cast butterfly valve includes casting a cylindrical valve body and a disc-shaped butterfly plate first, making a valve shaft, making a valve shaft seat on the cast valve body and the cast butterfly plate, and making a valve shaft seat on the cast valve body and the cast butterfly plate. The steps of the sealing ring seat, and then install the sealing ring on the sealing ring seat of the casting valve body and the casting butterfly plate, and the steps of assembling the butterfly valve; or first cast the cy...
Claims
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IPC IPC(8): F16K1/22B29C35/00B29C33/42
Inventor 康显汉陈晓刚陈智礼
Owner TIELING SPECIAL VALVE