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One-time forming method for valve pipe of ball valve body

A valve body and valve tube technology, applied in the direction of metal extrusion dies, etc., can solve problems such as difficult to guarantee weld quality, difficult to reduce costs, complex processing technology of small diameter ball valve body, etc., to improve the compressive strength and consistency Sexuality and the effect of prolonging the service life

Active Publication Date: 2021-04-27
NANJING JIANGU HIGH & MIDDLE PRESSURE VALVE MFG CO LTD
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the valve body of small diameter ball valve has complex processing technology, and it needs to be welded to connect with the valve pipe, resulting in many process steps, difficult to reduce the cost, and difficult to guarantee the quality of the weld seam. The valve body and valve tube are formed at one time, which saves the welding step of the valve body and the valve tube. The one-time forming method of the ball valve body and valve tube

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  • One-time forming method for valve pipe of ball valve body
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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as Figure 1-2 shown.

[0025] A method for one-time forming of a valve body and valve tube of a ball valve, comprising the following steps:

[0026] First of all, according to the principle of constant material volume, according to the diameter of the final formed valve (that is, the inner diameter of the valve tube, generally less than 50mm, when it exceeds 50mm, the requirements for the press and molding die are higher, and if conditions permit, it can also be used. One-time molding) and the length of the valve tube to calculate the outer diameter and length of the raw material tube;

[0027] Secondly, a mounting hole for installing the valve stem sleeve 5 is processed at the central position of the raw material pipe. During specific implementation, the mounting hole can also be processed and formed after forming;

[0028] Third, put t...

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Abstract

The invention discloses a one-time forming method for a valve pipe of a ball valve body. The one-time forming method for the valve pipe of the ball valve body is characterized by comprising the following steps: firstly, the outer diameter and the length of a raw material pipe are calculated according to the principle that the material volume is not changed; secondly, an installation hole for installing a valve rod sleeve is machined in the central position of the raw material pipe; thirdly, the machined ball body matched with the drift diameter is filled into the raw material pipe; fourthly, supporting rings used for locating the ball body are additionally arranged at the two ends of the ball body, meanwhile, a sealing seat is additionally arranged between the supporting rings and the ball body, a sealing ring is installed in the sealing seat, and a mold pressing raw material is obtained; fifthly, the two ends of the mold pressing raw material are arranged on a forming mold in a sleeving mode separately, and the forming mold is installed on a pressing machine for pressurization; and finally, the forming mold is moved in the opposite direction, the valve body formed through pressing is taken down, and the valve body and the valve pipe are in transition connection through a frustum body. The method is simple, high in machining efficiency and quality, and capable of reducing the machining cost.

Description

technical field [0001] The invention relates to a valve technology, in particular to a ball valve processing technology, in particular to a one-time forming method of a ball valve body and valve tube. Background technique [0002] The valve body and valve tube of the traditional small diameter ball valve (50mm and below) are formed by welding. This method not only needs to prepare two raw materials with different pipe diameters, but also increases the difficulty of procurement and the space for material preparation. Groove processing is required, which increases the machining cost. At the same time, welding defects are prone to appear during welding, and welding flaw detection is required, which increases the processing procedures. These increases greatly increase the processing cost of the valve. At the same time, the weld seam formed by welding has poor aesthetics, and will become the first part to be corroded or damaged during use. In today's highly competitive market, s...

Claims

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Application Information

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IPC IPC(8): B21C23/03B21C25/02
CPCB21C23/03B21C25/02
Inventor 王俊贤王怀民陈婉萍路佳慧
Owner NANJING JIANGU HIGH & MIDDLE PRESSURE VALVE MFG CO LTD
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