Integral-valve seat type ball valve

Abstract

The invention discloses an integral-valve seat type ball valve, comprising a main valve body (1) and an assistant valve body (2), a ball core (8) connected with a valve rod (14) is arranged in the main valve body (1), a packing assembly (12) is arranged between the valve rod (14) and the main valve body (1), an inlet valve seat (7) is arranged between the inlet end of the ball core (8) and the main valve body (1), a spring (9) is arranged at the outer side of the valve seat (7), the outlet end of the ball core (8) is matched with the spherical orifice of the assistant valve body (2), a flange-type shaft shoulder arranged at the middle part of the assistant valve body (2) is connected with the main valve body (1) through bolts, and metal hexangular gaskets (6) and valve body wound gaskets (5), used for sealing are arranged between the assistant valve body (2) and the main valve body (1). The integral-valve seat type ball valve has following beneficial effects: the outlet valve seat and the assistant valve body are in an integral structure, and a double-layered sealing is adopted so that safety and reliability are achieved, and the service life is long.

Description

technical field [0001] The invention relates to a valve, in particular to an integral valve seat type ball valve. Background technique [0002] The outlet valve seat in the existing ordinary ball valve is often separated from the auxiliary valve body. In order to realize the back sealing of the valve seat, the separated outlet valve seat is usually assembled after pairing and grinding of the outlet valve seat and the auxiliary valve body. This will inevitably increase the technical requirements for assembly and grinding, and also increase the workload of the assembler; the separated auxiliary valve body and outlet valve seat have cumulative assembly errors, and it is difficult to control the distance between ball centers. In addition, the separated auxiliary valve body and outlet valve seat also face the phenomenon that once the ball core rotates, the outlet valve seat will be driven to rotate, which increases the probability of adverse factors such as wear and damage, and r...

AI Technical Summary

Problems solved by technology

[0002] The outlet valve seat in the existing ordinary ball valve is often separated from the auxiliary valve body. In order to realize the back sealing of the valve seat, the separated outlet valve seat is usually assembled after pairing and grinding of the outlet valve seat and the auxiliary valve body. This will inevitably increase the technical requirements for assembly and grinding, and at the same time increase the workload of the assembler; there are cumulative assembly errors in the separated auxiliary valve body and outlet valve seat, and it is difficult to control the ball center distance.

In addition, the separated auxiliary valve body and outlet valve seat also face the phenomenon that once the ball core rotates, the outlet valve seat will be driven to rotate, which increases the probability of adverse factors such as wear and damage, and reduces the reliability of the valve body seal.

Therefore, the separation of the auxiliary valve body and the outlet valve seat is difficult to eliminate the occurrence of leakage on the back of the valve seat due to various reasons.

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