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Low-pressure large-aperture thin-wall casting steel gate valve and casting method

A large-diameter, steel-casting technology, applied in casting molding equipment, molds, sliding valves, etc., to reduce costs, increase pouring speed, and increase market share

Pending Publication Date: 2020-07-14
阳泉阀门股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main body of the existing low-pressure large-diameter gate valve includes a valve body, gate plate, and bonnet. The materials of the valve body, gate plate, and bonnet are all gray cast iron or ductile iron. For example, the wall thickness of small-diameter high-pressure cast steel gate valves is thick. Now, as users have higher and higher requirements for valves, the current gate valves are increasingly unable to meet people's needs.

Method used

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  • Low-pressure large-aperture thin-wall casting steel gate valve and casting method
  • Low-pressure large-aperture thin-wall casting steel gate valve and casting method
  • Low-pressure large-aperture thin-wall casting steel gate valve and casting method

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Embodiment

[0026] Such as figure 1 As shown, a low-pressure large-diameter thin-wall cast steel gate valve includes a valve body 1, a gate plate 2, a valve cover 3, a valve stem 4, a column 5, and a transmission device 6. The materials of the valve body 1, gate plate 2, and valve cover 3 are uniform. For cast steel.

[0027] Such as Figure 2-4 As shown, the casting method of the low-pressure large-diameter thin-walled cast steel gate valve is as follows, including castings. The castings include valve body steel castings, gate steel castings, and bonnet steel castings. Cold iron, sand layer thickness of 8 to 15mm, large riser and heating riser are arranged in the upper sand mold difficult feeding area of ​​the casting, and refractory materials are placed on the casting riser corresponding to the position of the sand core; when pouring, the sand box is tilted at a certain angle; casting When casting from the riser.

[0028] The number of cold irons is determined according to the size o...

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Abstract

The invention provides a low-pressure large-aperture thin-wall casting steel gate valve. The low-pressure large-aperture thin-wall casting steel gate valve comprises a valve body, a gate plate, a valve deck, a valve rod, a stand column and a transmission device. The valve body, the gate plate and the valve deck are all made of cast steel. The low-pressure large-aperture thin-wall casting steel gate valve meets various types of requirements of different users for valve materials and can operate normally in a particularly cold region, especially at minus 40 DEG C.

Description

technical field [0001] The invention relates to the technical field of gate valves, in particular to a low-pressure large-caliber thin-wall cast steel gate valve and a casting method. Background technique [0002] The main body of the existing low-pressure large-diameter gate valve includes a valve body, gate plate, and bonnet. The materials of the valve body, gate plate, and bonnet are all gray cast iron or ductile iron. For example, the wall thickness of small-diameter high-pressure cast steel gate valves is thick. Now, as users have higher and higher requirements for valves, the current gate valves are increasingly unable to meet people's needs. Contents of the invention [0003] The object of the present invention is to provide a low-pressure large-caliber thin-wall cast steel gate valve. It meets the requirements of low medium pressure and low working temperature. It is suitable for use as a cut-off device on pipelines containing tar gas and pure gas, and is widely u...

Claims

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Application Information

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IPC IPC(8): F16K3/02F16K3/314F16K27/04B22C9/08B22D27/04B22C9/02
CPCF16K3/0263F16K3/314F16K27/04B22C9/088B22D27/04B22C9/02
Inventor 梁志宝马慧钊赵爱花
Owner 阳泉阀门股份有限公司