Direct-buried gate valve

A technology of gate valve and direct burial, applied in sliding valves, valve details, valve devices, etc., can solve the problems of large shape, leakage, troubles, etc., reduce the possibility of corrosion, solve unreliability, and reduce leakage points Effect

Inactive Publication Date: 2009-01-07
SUZHOU GAS EQUIP & VALVES MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 thro

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Embodiment Construction

[0014] The invention discloses a novel directly buried gate valve. Such as figure 1 , figure 2 As shown, it includes a valve body 3 and a valve cover 1 connected to each other, and the valve body 3 is provided with a valve body interface 4 . The valve cover 1 is provided with a counterbore, and a fastener is placed in the counterbore to connect the valve body and the valve cover together. In this preferred embodiment, the said fastener is a screw 7, and a spring washer 6 is set on the screw 7. The head of the screw 7 is lower than the outer surface of the valve cover 1 , that is to ensure that the screw 7 is not exposed outside the valve cover 1 . And, the end of the counterbore of described bonnet 1 is also provided with a rubber cap 5, and the shape of rubber cap 5 just can block the opening of counterbore, is that screw 7 can't be contacted with the outside world, has reduced screw 7 possibility of being corroded.

[0015] In addition, two discharge pipes 2 are fixedl...

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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] ...

Claims

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Application Information

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IPC IPC(8): F16K27/04F16K27/12F16K39/04F16K3/30
Inventor 沈伟伟张红军汪勇刚徐利民
Owner SUZHOU GAS EQUIP & VALVES MFG
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