Direct-buried gate valve

Abstract

The present invention provides a direct buried gate valve, which comprises a valve body and a valve cover that are connected with each other; wherein, the valve body is provided with valve body ports; the valve cover is provided with a counterbore; a fastener is arranged in the counterbore and connects the valve body with the valve cover. The head of the fastener is lower than the outer surface of the valve cover and is hidden in the counterbore of the valve cover; a discharge pipe is fixed on the outside of each valve body port. The direct buried gate valve is widely applicable to fuel gas distribution systems, the valve body and the valve cover adopt an integrated connecting structure, the bolt is hidden in the integrated connecting structure, thereby, not only the shape of the valve becomes smaller, but also the number of exposed points is reduced, and moreover, the fastener cannot be easily eroded after the valve is directly buried. Meanwhile, since the two firm discharge pipes are arranged on the valve body to replace the pipeline discharge function, the technical problem of the unreliability of the arrangement of the discharge pipes on a pipeline is effectively resolved.

Description

technical field [0001] The invention relates to a gate valve, in particular to a direct-buried gate valve, which belongs to the technical field of valve processing. Background technique [0002] Gate valve refers to the valve whose gate plate moves along the vertical direction of the channel axis. It is mainly used to cut off the medium on the pipeline, that is, it is fully open or fully closed. It can be applied to low temperature and low pressure as well as high temperature and high pressure. Its advantages: ①The fluid resistance is small; ②The torque required for opening and closing is small; ③It can be used on the ring network pipeline where the medium flows in two directions, that is to say, the flow direction of the medium is not restricted; ④When fully opened, the sealing surface is basically It is not eroded by the working medium; ⑤The body structure is relatively simple, and the manufacturing process is better; ⑥The structural length is relatively short. [0003] ...

AI Technical Summary

Problems solved by technology

This kind of connection is easy to cause leakage at the flange, and its shape must also be designed to be larger

In addition, when the gate valve is placed in the natural gas pipeline, when it is necessary to shut down the gas for construction, it is necessary to release the local medium. The medium is released through the release pipe installed on the pipeline, but because the release pipe is not very good on the pipeline Fixed, the quality of the welding cannot be verified, and the anti-corrosion measures cannot be tested, so it will cause the unreliability of the placement of the release pipe and cause unnecessary trouble

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