Ball valve and combination method thereof

Abstract

The invention discloses a ball valve and a combination method thereof. The ball valve comprises a valve seat (2) with a first port end (21), a valve body (1) with a second port end (12), a ball valve element (3) and a valve rod (4), the valve seat (2) and the valve body (1) are fixedly connected to form a valve cavity (11), the ball valve element (3) is arranged in the valve cavity (11), and the valve rod (4) adjusts the valve element. The ball valve is characterized in that the valve seat (2) and the valve body (1) are subjected to casting forming respectively by stainless steel materials, and fixedly welded by laser. The combination method of the ball valve includes that (A10) the valve seat is processed by the stainless steel materials through a casting method; (A20) the valve body is processed by the stainless steel materials through the casting method; (A30) the valve element (3) is processed and formed by the stainless steel materials or a copper material; (A40) the valve seat (2) is fixedly connected with the valve body (1) through a laser welding process. By means of the combination method, materials of the valve body or the valve seat can not be deformed after heated, and thereby, opening and closing performances of the valve can not be affected.

Description

Technical field [0001] The invention relates to the technical field of refrigerant fluid control components, in particular to a ball valve and a combination method thereof. Background technique [0002] The ball valve is widely used in refrigeration systems as an outflow switching element to cut off and conduct the refrigerant. Specifically, please refer to figure 1 . figure 1 It is a schematic diagram of the structure of a ball valve in the prior art. The ball valve in the prior art includes a valve body 1'. The valve body has a valve cavity 11', a first interface 21' connected to the outdoor unit, and The second interface end 12'; the valve cavity 11' is provided with a valve core ball 3'and a valve stem 4, the valve core ball 3 is provided with a valve core channel 31, and the valve stem 4 can drive the valve core ball 3 to rotate to facilitate the valve core channel 3'1 connects the first interface end 21' and the second interface end 12' or interrupts the communication betw...

AI Technical Summary

Problems solved by technology

Such a process will cause thermal deformation of the valve cavity and affect the effect and reliability of valve closing, so the sealing reliability of the valve cavity is not high. In order to reduce the impact of the argon welding process on the sealing surface of the spherical valve core ball 3, it is generally necessary to increase the material thickness, and keep the welding point away from the valve core ball 3. At the same time, in order to reduce the deformation of the material after thermal denaturation, the parts need to be cooled at the same time. The process is complex and prone to quality defects

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