Gate valve capable of automatically adjusting sealing height along with water level change for hydraulic engineering

Abstract

The invention discloses a gate valve capable of automatically adjusting the sealing height along with the water level change for hydraulic engineering. The gate valve comprises a gate valve body, a preset electric push rod, a movable valve plate, a connecting sliding block and a guiding magnetic ring. The preset electric push rod is installed at the upper end of the gate valve body through bolts,and the movable valve plate is fixedly connected to the output end of the preset electric push rod. The movable valve plate is connected with the inner side of the gate valve body, first air bags areconnected to the inner side of the lower end of the gate valve body in an adhesive mode, and an accommodating groove is formed in the side edge of the lower end of the gate valve body. According to the gate valve capable of automatically adjusting the sealing height along with the water level change for the hydraulic engineering, the movable valve plate performs sealing work along the lower end ofthe gate valve body through the preset electric push rod, the lower end of the movable valve plate makes contact with the first air bags accordingly, so that the movable valve plate is pressed to supply air into two groups of second air bags, then two groups of butt joint pieces are pushed to move inwards to be extruded and attached to the outer surface of the movable valve plate, and therefore the sealing effect of the device is further enhanced while the sealing stability is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a slide valve for water conservancy engineering which can self-adjust the sealing height according to the change of water level. Background technique [0002] With the continuous progress and development of water conservancy projects in our country, all kinds of water conservancy equipment have been gradually developed and used. Among them, the flapper valve is one of the basic objects used for pipeline sealing and opening, and the flapper valve is a kind of The gate and the valve seat are always in close contact with the sealed valve. It is widely used in the field of docking with various pipelines. The valve is opened and closed through manual or electric movable structures. However, the existing slide valves for water conservancy projects still have certain defects, such as: [0003] 1. The sealing range of the existing flapper valves for water conservan...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a flapper valve for water conservancy projects that can self-adjust the sealing height as the water level changes, so as to solve the problem that the sealing range proposed in the above background technology is relatively limited, and most of them can only match the corresponding water level according to the height of the preset sealing member. Carrying out sealing treatment, in special circumstances such as rainwater and other weather, when the water level rises accidentally, it is easy to cause the sealing range of the device to be unable to be guaranteed, and there are still certain defects in the sealing performance. Water seepage and other adverse phenomena are prone to occur in the butt joint gap, which leads to the problem that the support stability cannot be guaranteed

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