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Method for producing thick-wall hollow valve cores of large-scale ball valves

A production method and hollow valve technology, which is applied in the field of large-scale ball valve parts manufacturing, can solve the problems of complex production process of thick-walled hollow valve core, difficult to reliably guarantee product accuracy, complicated calculation and lofting, etc., to reduce processing costs and ensure accuracy , The effect of simplifying the process

Active Publication Date: 2012-12-26
张轩
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Problems solved by technology

[0004] During the production process, we found that the production process of the existing thick-walled hollow valve core is relatively complicated, requiring complicated calculations and lofting, and there are many processes, it is difficult to reliably guarantee the accuracy of the product, and the production cost is also relatively high. Therefore, it is urgent Need to solve the above technical problems

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  • Method for producing thick-wall hollow valve cores of large-scale ball valves

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Embodiment Construction

[0022] The following combined with the attached drawings and the embodiment further explain the present invention:

[0023] Reference figure 1 , A thick wall empty valve core production method of a large ball valve, the steps are as follows:

[0024] A, the material is selected, the material is steel plate, the steel plate is preferably stainless steel plate, and the thickness of the steel plate is 50 to 200mm, and the length of the steel plate is determined according to the diameter DN of the steel pipe required by step b.

[0025] B. Roll tube, roll the thick steel plate selected by the step A through a large rolling machine into a round tube, and then welded the gap in the connection. Finally, the thick wall has a seam steel pipe, and the diameter of the steel pipe is DN≥2.6m.

[0026] C. Inverted cone surface, the two tubes of the steel pipe obtained by step B are poured into a cone surface, and the conicalness of the cone surface is preferably 30 ° to 45 °.In addition, step C...

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Abstract

The invention discloses a method for producing thick-wall hollow valve cores of large-scale ball valves. The method comprises the following specific steps of: a. selecting a steel plate as a material; b. rolling the thick steel plate selected in the step a into a circular pipe shape so as to finally obtain a thick-wall seamed steel pipe; c. respectively chamfering the outer walls of two orifices of the steel pipe obtained in the step b into circular conical surfaces; d. pre-pressing the outer walls of the two orifices of the steel pipe obtain in the step c into arc-shaped surfaces; and e. arranging an upper die and a lower die on a press, placing the steel pipe obtained in the step d in the lower die, and combining and pressurizing the upper and lower dies to obtain a finished thick-wall hollow valve core. According to the method, the complicated computing and lofting are not required and the splicing and the welding are also not required, so that the process is markedly simplified, the process difficulty is reduced, the product precision is reliably ensured, the processing cost is reduced, and excellent technological and economical values are provided, so that the method is suitable to large-scale popularization and application.

Description

[0001] Technical field [0002] The present invention is a large -scale ball valve component manufacturing field. Specifically, it involves a method of producing large -scale ball valve thick wall hollow valve cores. Background technique [0003] Large ball valves generally refer to valves in diameter DN≥300mm. It is widely used in oil transportation lines, chemicals, and power equipment.The thick wall empty valve core is an important part of a large ball valve, which is used to control the flow state of the fluid in the valve core.At present, the thick wall hollow valve core of the large ball valve generally uses the following steps: first calculate and put samples on the thick steel plate, followed by the samples on the pressure machine to process the multi -melon -type components according to the sample data, and then the multiple melons will be used for multiple melons.The petal parts are stitched together to form the shape of the thick wall hollow valve core. Finally, the tw...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 张轩
Owner 张轩
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