Floating seat balanced high temperature regulating cut-off valve

A technology of floating valve seat and cut-off valve, which is applied in the direction of valve details, valve lift, valve device, etc., can solve the problems of high temperature resistance, low temperature resistance, and difficulty in sealing at the same time, so as to achieve good sealing effect and high temperature resistance Effect

Active Publication Date: 2015-12-23
ZHEJIANG BEIER CONTROL VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unbalanced regulating valve is divided into balanced sleeve single-seat regulating valve and balanced sleeve double-seat regulating valve. The balanced sleeve single-seat regulating valve has a metal sealing pair and a tetrafluoroethylene soft seal, and the sealing effect is good. , but the temperature is low; the balanced sleeve double-seat regulating valve has two metal sealing pairs, it is difficult to achieve two seals completely sealed at the same time, and the temperature is high

Method used

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  • Floating seat balanced high temperature regulating cut-off valve
  • Floating seat balanced high temperature regulating cut-off valve
  • Floating seat balanced high temperature regulating cut-off valve

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as Figure 1-4 As shown, the present invention provides a floating valve seat balanced high temperature regulating shut-off valve, comprising a valve body 1, a valve seat 2, a valve core 3, a sleeve 4, a floating valve seat 14 on the valve core and a valve stem 6, the valve core 3 is set in the valve body 1, and the valve body 1 is provided with a valve seat 2 at the position between the water inlet and the water outlet, and the valve core 3 is arranged on the valve seat 2 so as to be openable and A first lower sealing surface is provided at the fitting place of the seat 2, and a second lower sealing surface is arranged at the fitting place of the valve seat 2 and the valve core 3; the first lower sealing surface and the second lower sealing surface form a lower sealing pair.

[0019] The valve seat 2 is fixed in the valv...

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Abstract

The invention provides a floating valve seat balanced-type high-temperature regulating cutoff valve, which comprises a valve body, a valve seat, a spool, a sleeve, a floating valve seat on the spool, and a valve rod. The spool is arranged in the valve body. The valve seat is arranged at a position between a water inlet and a water outlet in the valve body. The valve seat is fixedly arranged in the valve body through the sleeve. The end of the valve rod is connected with the spool. The upper end surface of the spool is connected with a spool cover plate through a screw. A ring notch is arranged on the side surface of the spool. The floating valve seat on the spool is sheathed at the ring notch. A ring groove with a rectangular section is formed between the floating valve seat on the spool, the spool and the spool cover plate. An alloy-graphite composite gasket and a spring are arranged in the ring groove. One end of the spring is elastically butted with the spool cover plate. The other end of the spring is butted with the alloy-graphite composite gasket. A gap is left between the spool cover plate and the floating valve seat on the spool. The floating valve seat balanced-type high-temperature regulating cutoff valve has the advantages that the two sealing pairs can be fully and simultaneously sealed, the sealing effect is better and the tolerable temperature is high.

Description

technical field [0001] The invention belongs to the field of valves, and in particular relates to a floating seat balanced high temperature regulating cut-off valve. Background technique [0002] Straight stroke control valves are divided into flat and horizontal type and unbalanced type. The balanced type control valve has only one sealing surface, and the unbalanced force is large, which is suitable for working conditions with relatively small closing pressure difference; there is a balance on the spool of the unbalanced type control valve. The hole can offset part of the pressure, and the actuator needs to be relatively small, which is suitable for occasions with large pressure difference. The unbalanced regulating valve is divided into balanced sleeve single-seat regulating valve and balanced sleeve double-seat regulating valve. The balanced sleeve single-seat regulating valve has a metal sealing pair and a tetrafluoroethylene soft seal, and the sealing effect is good. ...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K1/32F16K1/36F16K41/10
Inventor 史艳伟邢忠昌林峰舒婷洁王平红
Owner ZHEJIANG BEIER CONTROL VALVE
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