Valve seat structure of fixed ball valve
A technology for fixing ball valves and valve seats, applied in valve devices, cocks including cut-off devices, engine components, etc., it can solve problems such as insufficient sealing specific pressure, poor fit between valve seat and ball, valve leakage, etc., and achieve sealing performance. Good, easy assembly, long life effect
Inactive Publication Date: 2016-05-18
TIANJIN UNIV
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- Description
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Problems solved by technology
But in practice, due to the manufacturing and assembly errors of the valve seat and the quality of the spring, etc., the valve seat and the ball may not fit tightly and the sealing specific pressure is insufficient, which may lead to leakage of the valve in practical application.
Method used
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[0015] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0016] see Figure 1 ~ Figure 3 , a fixed ball valve seat structure, including a valve seat 5 assembled in the valve body 1, the end surface of the valve seat 5 close to the sphere is in sealing fit with the sphere 6, and the valve seat 5 and the valve body 6 are slidably sealed The end of the valve seat 5 away from the sphere adopts a conical surface structure; the valve body 1 is provided with a bolt 2 threaded with it, and the bottom of the bolt 2 adopts a conical surface structure, and the conical surface structure at the bottom of the bolt matches It is firmly pressed against the cone structure of the valve seat. When the bolt is tightened, the conical surface structure at the bottom of the bolt presses the conical surface structure of ...
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Abstract
The invention discloses a valve seat structure of a fixed ball valve. The valve seat structure comprises a valve seat assembled in a valve body. The end face, close to a ball body, of the valve seat is attached to the ball body in a sealing mode, the valve seat and the valve body are in sliding and sealing connection, and the end, far away from the ball body, of the valve seat is of a cone structure. Bolts which are in threaded connection with the valve body are arranged on the valve body, the bottoms of the bolts are of a cone structure, and the bottom cone structures of the bolts are pressed onto the cone structure of the valve seat in a matched mode. According to the valve seat structure of the fixed ball valve, the pressing bolts are arranged at the end, far away from the ball body, of the valve seat, and the ball body and the valve seat are made to form a cone pressing push structure, so that the attaching compact degree of the valve seat and the ball body is adjustable, and the problems of not compact attaching of the valve seat and the ball body and insufficient sealing specific pressure are solved. Meanwhile, the valve seat structure of the fixed ball valve further has the advantages of being simple in structure, convenient to assemble, good in sealing performance and long in service life.
Description
technical field [0001] The invention belongs to the field of valves, in particular to a high-reliability fixed ball valve seat structure. Background technique [0002] The design of the valve is usually to set a spring behind the valve seat, and the valve seat is tightly attached to the ball through the pre-tightening force of the spring and the medium pressure in the pipeline, so as to achieve the purpose of sealing. In the design, the preload force of the spring can be calculated through the necessary sealing specific pressure between the valve seat and the ball. In theory, the valve seat can be tightly fitted to the ball and obtain sufficient sealing specific pressure. However, in practice, due to the manufacturing and assembly errors of the valve seat and the quality of the spring, the valve seat and the ball may not fit tightly and the sealing specific pressure is insufficient, which may cause leakage in the actual application of the valve. Contents of the invention ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F16K5/06F16K5/08F16K5/20
CPCF16K5/0689F16K5/08F16K5/202
Inventor 吴松勇李清户立杰孙一昂萨兰
Owner TIANJIN UNIV