CN201779282U - Valve buffering structure - Google Patents

Abstract

The utility model relates to a valve buffer structure, characterized in that a central through hole and a bypass hole communicating with the central through hole are provided on the valve disc, a sealing component is provided between the central through hole and the bypass hole, the sealing disc of the sealing component is connected with a transmission rod, and a limit mechanism is provided between the transmission rod and the valve disc. The utility model is characterized in that: by providing a buffer structure on the valve disc, the pressure difference between the inlet and outlet ends of the valve is reduced, pressure balance is achieved, the impact of the medium on the valve element is greatly alleviated, the valve opening operation is stable, the vibration amplitude is small, the noise is low, and the service life of the components is extended.

Description

Valve buffer structure

technical field

The utility model relates to a valve, in particular to a valve buffer structure capable of adjusting the pressure difference between the inlet and outlet of the valve.

Background technique

The valve is controlled by the cooperation of the valve body and the disc to control the conveying medium. After the valve is closed, the pressure at the inlet end and the outlet end are different, resulting in a pressure difference. At the moment the valve is opened, the existence of the pressure difference will cause the medium to pass through the valve. The valve parts and pipelines produce huge instantaneous impact force, causing the valve to vibrate and accompanied by noise. Vibration affects the sealing performance and service life of the valve and the pipeline connected to it, as well as other equipment used for testing. Especially for valves used in high-pressure pipeline systems, the vibration is particularly severe. Under some specific high-pressure working conditions, the existing valves cannot meet the requirements of stable operation, small vibration amplitude and low noise.

Contents of the invention

The purpose of the utility model is to provide a valve buffer structure, which can reduce vibration and noise and ensure the performance of the valve by adjusting the inlet and outlet pressure of the valve.

The technical solution of the utility model is: a valve buffer structure, which is characterized in that a central through hole and a bypass hole communicating with the central through hole are arranged on the valve disc, and a sealing assembly is arranged between the central through hole and the bypass hole , the sealing disc of the sealing assembly is connected with the transmission rod, and a limit mechanism is arranged between the transmission rod and the valve disc.

The limiting mechanism is to open a through hole on the disc wall, and set a limiting groove on the transmission rod at a position opposite to the through hole. The limiting ball is located in the through hole and the limiting groove, and the through hole is provided with a limiting Limit screw for ball movement.

The valve buffer structure provided by the utility model is to set a central through hole and at least two symmetrically arranged bypass holes on the disc of the valve. The central through hole and the bypass holes are connected to connect the inlet and outlet of the valve. A sealing assembly is provided between the central through hole and the bypass hole for connecting or disconnecting them. The sealing disc of the sealing assembly is connected with the transmission rod, and a limit mechanism is set between the transmission rod and the valve disc, and the movement range of the transmission rod along the central through hole of the valve disc is limited by the limit mechanism. When the transmission rod moves, it first drives the sealing flap to move, and then drives the valve flap to move. In this way, during the opening process of the valve, part of the medium first enters from the valve inlet to the outlet through the central through hole and the bypass hole to balance the valve inlet. Reduce the pressure difference and reduce the impact of the medium on the valve element, and then the valve will fully open.

The utility model is characterized in that: by setting the buffer structure on the disc of the valve, the pressure difference between the inlet and outlet ends of the valve is reduced, pressure balance is realized, the impact of the medium on the valve element is greatly relieved, the valve opening operation is stable, the vibration amplitude is small, and the noise is low. low, prolonging the service life of components.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in the figure, the valve buffer structure is to open a central through hole 2 and two symmetrically arranged bypass holes 3 on the valve disc 1 matched with the valve body 13, not limited to 2, and the bypass holes communicate with the center. The holes are connected. A sealing seat 4 is provided on the central through hole section from the sealing end face of the valve flap to the bypass hole, and a sealing flap 5 is arranged on the sealing seat to form a sealing assembly. When the sealing assembly is in the closed state, the bypass hole is not connected to the lower central through hole; when the sealing assembly is in the open state, the bypass hole is connected to the lower central through hole to connect the inlet and outlet of the valve. The sealing flap is connected with one end of the transmission rod 6, and the other end of the transmission rod stretches out of the central through hole and is connected with the driving mechanism. The limit mechanism is distributed with through holes 7 on the peripheral wall of the upper part of the valve disc. Generally, 4 through holes can be arranged symmetrically. The transmission rod opposite to the through holes is provided with an annular limit groove 8, and the limit ball 9 is located between the through hole and the through hole. In the limit groove, the limit ball is limited by the limit screw 10 threaded with the through hole. The height of the limit groove is the distance that the sealing disc moves in the through hole in the center of the valve disc. The central through hole at the lower part of the disc communicates with the bypass hole.

When the valve is opened, driven by the driving mechanism, the transmission rod rises, and the sealing disc connected with it rises accordingly. At this time, the valve disc does not move, and the sealing assembly is opened first, and the medium will flow from the inlet port of the valve through the central through hole and the bypass hole. 11 enters the outlet port 12, and the pressure at the inlet and outlet ports of the valve is balanced by a small amount of inflowing medium. As the transmission rod continues to rise, under the restriction of the limit mechanism, the sealing disc and the valve disc move upward at the same time, and the valve opens. On the contrary, the transmission rod moves downwards, the sealing assembly is closed first, and as the transmission rod continues to move down, the valve is closed.

Claims (2)

1. valve buffer structure, it is characterized in that the by-pass hole that on flap, is provided with central through bore and communicates with central through bore, between central through bore and the by-pass hole black box is set, the sealing lobe of black box is connected with drive link, is provided with position-limit mechanism between drive link and the flap.

2. valve buffer structure according to claim 1, it is characterized in that described position-limit mechanism is to offer through hole on the flap wall, restraining groove is established in position relative with through hole on the drive link, and spacing ball is positioned at through hole and restraining groove, is provided with the stop screw that the restriction spacing ball moves in the through hole.

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