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Automatic-control constant-pressure throttling valve

A technology of throttle valve and inlet pressure, applied in valve details, safety valve, balance valve, etc., can solve the problems of automatic take-off and excessive pressure change of safety valve.

Inactive Publication Date: 2015-09-02
德阳正光石油机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and provide a self-controlled constant pressure throttle valve. The present invention can automatically control the size of the flow output of the throttle valve by using the pipeline pressure, which solves the problem of the safety valve in the prior art. The problem of automatic take-off due to excessive pressure changes

Method used

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  • Automatic-control constant-pressure throttling valve

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Embodiment 1

[0027] A self-controlled constant pressure throttle valve, including a valve body 1 and an actuator, the actuator includes a cylinder 2, a cylinder head 3, a piston 5, a pressure taking tube 6 and an elastic element, and the cylinder 2 is fixed on the valve Above the main body 1, the cylinder head 3 is fixed on the upper part of the cylinder body 2, the piston 5 is movably arranged in the cylinder body 2, and the lower part of the piston 5 is fixed on the valve stem 19 of the valve main body 1, and the elastic element is fixedly arranged Between the cylinder body 2 and the valve main body 1, and the elastic element is fixedly connected with the piston 5; Set above the piston 5 in the cylinder body 2; when the pressure at the output end 20 of the valve main body 1 increases, the medium pressure is transmitted to the top of the piston 5 through the pressure sensing tube 6 to make the piston 5 move down, and the piston 5 indirectly drives the valve stem 19 and the valve. The flap...

Embodiment 2

[0035]A self-controlled constant pressure throttle valve, including a valve body 1 and an actuator, the actuator includes a cylinder 2, a cylinder head 3, a piston 5, a pressure taking tube 6 and an elastic element, and the cylinder 2 is fixed on the valve Above the main body 1, the cylinder head 3 is fixed on the upper part of the cylinder body 2, the piston 5 is movably arranged in the cylinder body 2, and the lower part of the piston 5 is fixed on the valve stem 19 of the valve main body 1, and the elastic element is fixedly arranged Between the cylinder body 2 and the valve main body 1, and the elastic element is fixedly connected with the piston 5; Set above the piston 5 in the cylinder body 2; when the pressure at the output end 20 of the valve main body 1 increases, the medium pressure is transmitted to the top of the piston 5 through the pressure sensing tube 6 to make the piston 5 move down, and the piston 5 indirectly drives the valve stem 19 and the valve. The flap ...

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Abstract

The invention discloses an automatic-control constant-pressure throttling valve. The automatic-control constant-pressure throttling valve comprises a valve body and an execution mechanism. The execution mechanism comprises a cylinder body, a cylinder cover, a piston, a pressure tapping pipe and an elastic element. The cylinder body is fixedly arranged above the valve body, the cylinder cover is fixed to the upper portion of the cylinder body, the piston is movably arranged in the cylinder body, the lower portion of the piston is fixed onto a valve rod of the valve body, and the elastic element is fixedly arranged between the cylinder body and the valve body and fixedly connected with the piston. A pressure tapping end of the pressure tapping pipe is communicated with an output end of the valve body, and a pressure discharging end of the pressure tapping pipe is arranged above the piston in the cylinder body. The automatic-control constant-pressure throttling valve has the advantages that flow output of the throttling valve can be automatically controlled under the action of pipeline pressure, and the problem that a safety valve in the prior art is prone to jumping automatically under overhigh pressure is solved.

Description

technical field [0001] The invention relates to the field of valves, in particular to an automatic control constant pressure throttle valve. Background technique [0002] Throttle valve is a valve that controls the flow of medium by changing the throttling section or throttling length. It is mainly composed of valve body, valve stem, valve core and valve seat. For example, Chinese patent number "200920234295.3" was issued on May 19, 2010 A novel throttle valve is disclosed, the technical proposal of which is that the throttle valve includes a valve body, a stuffing box, a valve stem provided in the cavity of the valve body, a handwheel provided at the front end of the valve stem, and a The valve seat fitted with the valve stem is characterized in that the stuffing box is a top-loading stuffing box facing away from the medium in the valve body, and the valve stem is connected to the valve stem body and the valve stem head by brazing. An integral brazed valve stem assembly, t...

Claims

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Application Information

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IPC IPC(8): F16K17/30F16K31/122
CPCF16K17/30F16K31/1221F16K31/1223
Inventor 周宁康林建国段太建何荣先
Owner 德阳正光石油机械制造有限公司
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