Non-rising stem flat gate valve

A technology of flat gate valves and hidden rods, applied in the direction of sliding valves, valve details, valve devices, etc., which can solve the problems of inconvenient operation and difficult operation of gate valves, and achieve the effects of long service life, flexible opening and closing, and reliable sealing

Inactive Publication Date: 2016-10-12
JIANGSU HUAZHAN PETROLEUM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gate valve is difficult to operate and inconvenient to operate

Method used

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  • Non-rising stem flat gate valve

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Embodiment Construction

[0017] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0018] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...

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Abstract

The invention provides a non-rising stem flat gate valve. The non-rising stem flat gate valve comprises a valve body, a valve seat, a valve deck, a packing gland, a support and an oil cup. The valve body is connected with the valve seat, a wave spring is arranged between the valve body and the valve seat, the valve deck is located above the valve body, and the packing gland is located above the valve deck; the packing gland is connected with the support through a screw, a valve rod is arranged in the center of the valve body, a bearing is arranged above the oil cup, and the oil cup makes contact with the valve rod in the mode that a pin penetrates through the support; a hand wheel is arranged above the packing gland, and a start and stop notice board is arranged on the hand wheel. A gate segment and the valve seat are treated through a special process and subjected to spray welding of hard alloy, sealing faces are free of friction, and the service life is long. Grease can be injected for auxiliary sealing dual protection, sealing is reliable, and the service life of the valve is longer. Compared with a traditional gate valve, the flat gate valve has the advantages of being small in switching torque, flexible in start and stop and the like.

Description

technical field [0001] The invention relates to a flat gate valve. Background technique [0002] Slab gate valves are suitable for natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other transmission pipelines, venting systems and gas storage devices, as opening and closing equipment. Z43 type single gate slab gate valve with diversion hole is suitable for long-distance pipelines for natural gas exploitation and purification. The slab gate valve is a sliding valve whose closing parts are parallel gates. The closing part can be a single ram or a double ram with a stretching mechanism in between. The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the floating gate or the floating valve seat. If it is a flat gate valve with double gates, the opening mechanism on the two gates can supplement this pressing force. Slab gate valve classification: Slab gate valve can be divided into manual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/02F16K3/30F16K41/02
CPCF16K3/0281F16K3/0227F16K3/30F16K41/02
Inventor 吴庆高
Owner JIANGSU HUAZHAN PETROLEUM MASCH CO LTD
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