Non-rising stem gate valve

A dark stem gate valve and valve stem technology, used in sliding valves, valve details, valve devices, etc., can solve the problems of uneven thickness of rubber layer, uneven thickness of rubber coating, and high operating torque, and achieve uniform valve disc thickness. The effect of accurate lagging and low operating torque

Inactive Publication Date: 2011-06-29
PENTAIR SHANGHAI PIPELINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flexible rubber will produce large deviations when the force is uneven, making the thickness of the lagging uneven
In this way, the thinner part is easily damaged during use, so that the internal gate valve parts are exposed to the medium and corroded
In addition, due to the uneven thickness of the rubber layer, it will also cause high operating torque

Method used

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Embodiment Construction

[0040] The specific implementation of the gate valve according to the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that although the features of the present invention are mainly described below in conjunction with an elastic-sealed concealed stem gate valve, the features of the present invention are also applicable to rising stem gate valves or metal-sealed gate valves unless otherwise specified.

[0041] Such as Figure 2-4As shown, the gate valve 1 according to the present invention includes a valve body 2, a valve cover 3 connected to the valve body 2 by connecting screws 10, a shaft cover 8 connected to the valve cover 3 by connecting screws 10, a valve stem 4, and a valve disc Nut 7, disc 5 and transmission device 6.

[0042] The valve rod 4 is relatively rotatably supported in the inner hole of the valve cover 3 through the rolling bearing 14 and the corresponding bushing 15, so that the va...

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Abstract

The invention provides a non-rising stem gate valve. The gate valve comprises a valve body, and a valve cover, a valve stem, a valve flap and a transmission device which are connected to the valve body, wherein the upper end of the valve stem is connected with the transmission device, and the lower end of the valve stem is connected with the valve flap; and the valve stem is relatively rotatably supported on the valve cover through a rolling bearing. The gate valve comprises an ultra-large torque safe transmission device which can effectively protect parts in the valve when operating torque is overlarge; a guide shoe is used for accurately positioning the valve flap in the rubber coating process, and rubber coating thickness is uniform; and the gate valve has small operating torque and long service life, and is reliably sealed and easy to assemble.

Description

technical field [0001] The invention relates to a hidden rod gate valve used in a pipe network system. Background technique [0002] Gate valve is a kind of valve widely used in pipeline network system, also often called gate valve and gate valve. In the gate valve, the valve stem drives the closing member (that is, the valve disc) to move in a direction perpendicular to the centerline of the valve seat to cut off and open the medium flow in the pipeline. Gate valves are generally suitable for working conditions where the disc is to be fully open or fully closed without frequent opening and closing. The characteristics of the gate valve are: the fluid resistance is small when fully open; the opening and closing is labor-saving (excluding special cases such as the sealing surface bites); it can be used in the case of two-way flow of the medium without directionality; the sealing surface is not easy to be eroded when fully open; The structure length is short, not only suitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/18F16K31/44F16K3/314F16K3/316F16K41/04
CPCF16D9/08F16K3/316F16K3/12F16K3/0254F16K31/508F16K3/0263F16K3/28
Inventor 爱尔登・塔克章莹蒲昌烈
Owner PENTAIR SHANGHAI PIPELINE
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