Ash discharging gland, valve seat structure and ball valve

Abstract

The invention discloses an ash discharging gland. The ash discharging gland comprises a sealing pressing ring and a spring abutting part, a medium distribution channel is formed in the middle of the sealing pressing ring, one end of the sealing pressing ring is used for pressing a sealing part, the sealing pressing ring is fixedly connected with or integrally provided with the spring abutting part, the spring abutting part is used for being abutted with a pre-tightening spring, and an ash discharging opening is formed between the spring abutting part and the sealing pressing ring and communicates with the medium distribution channel and a medium accumulation area. The invention further discloses a valve seat structure comprising the ash discharging gland and a ball valve. According to theash discharging gland, the valve seat structure and the ball valve, medium accumulated between the ash discharging gland and the pre-tightening spring can be automatically discharged, the pre-tightening spring is prevented from losing efficacy due to accumulation of the medium, and the sealing performance between a valve seat and a valve element is guaranteed.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an ash unloading gland, a valve seat structure and a ball valve. Background technique [0002] The seat is the removable part inside the valve that fits with the plug to open and close the valve. [0003] Such as figure 1 As shown, the seat structure of the existing ball valve includes a valve body 1, a valve seat 2, a preload spring 4, a seal 5 and a sealing gland 3, a valve seat 2, a seal 5, a sealing gland 3 and a preload spring 4. Set coaxially in the valve body 1 in turn. The sealing end of the valve seat 2 is used to be close to the valve core to form a seal. A seal groove is formed between the outer wall of the pressure end of the valve seat 2 and the inner wall of the valve body 1. The seal 5 Set in the seal groove (the seal 5 can choose O-ring at low temperature, and graphite seal at high temperature), the sealing gland 3 is adapted to the seal groove and used to compre...

AI Technical Summary

Problems solved by technology

[0005] When transporting solid medium in the existing ball valve seat structure, a medium accumulation area 11 will be formed between the sealing gland 3 and the pretension spring 4 or the limit step 12 in the valve body 1 and the pretension spring 4, and the solid medium is It is easy to accumulate in the medium accumulation area 11 and it is difficult to drain out. After the medium accumulation area 11 is filled with solid medium, it will cause the pretension spring 4 to be difficult to move and cause failure, which will affect the sealing effect of the seal 5. At this time, due to the valve seat 2 The pretightening force between the valve core and the valve core is insufficient, and it will affect the seal between the valve seat 2 and the valve core, and the valve cannot be shut off.

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