A special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process

A technology of polyurethane knife and knife gate valves, applied in valve details, valve devices, sliding valves, etc., can solve problems such as single corrosion resistance, complicated process, and short service life, and achieve low cost, convenient operation, and cost saving Effect

Active Publication Date: 2021-10-26
WENZHOU CHISUN VALVE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process. The material properties are relatively simple in corrosion resistance, the service life is not long and the process is complex

Method used

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  • A special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process
  • A special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process
  • A special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] see Figure 1-9 , a special lined polyurethane knife gate valve for acid and alkali corrosion resistance and its manufacturing process, making mold assembly: including a knife gate valve body 1, the inside of the knife gate valve body 1 is fixed and installed with a middle gate core puller 2 by pre-tightening bolts 6, and in the middle The two ends of the gate core-pulling 2 are respectively fixed with the setting mold 1 3 and the setting mold 2 4 by bo...

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Abstract

The invention discloses a special lining polyurethane knife gate valve for anti-acid and alkali corrosion and its manufacturing process. It comprises a knife gate valve body. The two ends of the core are respectively fixed with the setting die 1 and the setting die 2 by bolts. The connection between the setting die 1 and the knife gate valve body and the connection between the setting die 2 and the knife gate valve body are equipped with polyurethane linings, and the polyurethane lining A sealing surface is arranged on the core-pulling of the middle ram at the joint between the parts and the core-pulling of the middle ram. The present invention saves cost in technology, satisfies the performance of acid and alkali corrosion resistance, and at the same time can reduce the requirements for material selection on the gate valve body. If stainless steel is traditionally used, carbon steel or aluminum alloy after heat treatment can be used. It can also save or reduce costs. The gate and seal are lined with two different materials, soft and hard, and the seal is more precise and tight, which can prolong the service life of the product.

Description

technical field [0001] The invention relates to the technical field of general machinery and fluid control equipment, in particular to a polyurethane-lined knife gate valve specially designed to resist acid and alkali corrosion and its manufacturing process. Background technique [0002] With the gradual increase of oil mining to the sea and the gradual improvement of related chemical industries such as coal chemical industry, the demand for acid and alkali corrosion resistant pipelines is also increasing. Seawater corrosion, chemical acid and alkali corrosion corrode valves and other components on the pipeline It is very serious, and the development of valves resistant to strong acid and alkali corrosion is also an important topic in the development of valves today. Now it is generally selected from the selection of materials such as the use of nickel-based alloys, nickel-copper alloys, as well as methods such as lining porcelain and rubber. All of the above have their adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/00F16K3/02F16K3/314F16K27/04
CPCB29C69/00F16K3/02F16K3/314F16K27/044
Inventor 姜日静
Owner WENZHOU CHISUN VALVE MFG CO LTD
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