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Corrosion-resistant cut-off valve

A cut-off valve and corrosion-resistant technology, applied in the field of invention, can solve problems such as casualties, property loss, and reduced sealing effect, and achieve the effects of improved sealing and aging resistance, accurate and safe data, and good diversion effect

Active Publication Date: 2017-11-24
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Shut-off valves are widely used in petroleum, chemical, metallurgical and other industrial production departments, especially in long-distance pipelines as the main technical means of transporting crude oil, refined oil, natural gas and other chemical products. If they are damaged and a large number of products leak out, it will cause huge Potential safety hazards and property losses can cause casualties in serious cases. To solve this problem, the existing technology is to install a quick shut-off valve on the long-distance pipeline. Once the line pipe is damaged and the pipeline pressure drops sharply, the shut-off valve is quickly closed to reduce losses. , but the response speed of the cut-off valve in the prior art is not sensitive enough, and the sealing effect will decrease after long-term use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] like Figure 1~6 As shown, the corrosion-resistant cut-off valve includes a valve body 1. The valve body 1 is formed by connecting upper and lower parts. A sealing ring 12 is provided at the joint. An annular block 12a is provided in the middle of the sealing ring 12. An elastic Bending plate, the valve core 2 placed in the center of the valve body 1, the volume ratio of the valve core 2 to the volume of the valve cavity 11 is preferably 0.48:1, the valve body 1 is connected to the upper part of the tail end of the valve core 2 through a connecting pipe, and the valve core 2. The cross section is "U" shape. The inner side of the top of the valve core 2 is connected with the hydraulic cylinder 3 through the seal sleeve 32. The front of the hydraulic cylinder 3 is connected with the piston 31. The valve body 1 is equipped with an arc-shaped plug that cooperates with the piston 31. Block 13, hydraulic cylinder 3 is connected with flow control valve 62 and proportional ampl...

Embodiment 2

[0025] like Figure 1~6As shown, when the cut-off valve of the present invention transmits medium, the center of the valve core 2 coincides with the center of the valve body 1, and the medium flows in the valve cavity 11. When the medium passes through the piston 31, the single-piston rod hydraulic cylinder 3 is used to realize the reciprocating motion. The deceleration device can be eliminated, there is no transmission gap, and the movement is stable. Since the piston 31 and the sealing surface 33 are conical, it can play a role in diverting the medium, and the surface of the piston 31 is covered with the sealing surface 33, which is resistant to Good abrasion resistance, good sealing performance, good resistance to corrosion, oxidation and wear during the transportation of medium, can reduce flow resistance, the medium passes through the valve chamber 11 in a ring shape, so that the split flow should be smooth and there will be no turbulent flow and vibration and the lower e...

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Abstract

The invention discloses a corrosion-resistant cut-off valve and belongs to the technical field of valves. The corrosion-resistant cut-off valve comprises a valve body. A valve element is disposed in the center inside the valve body, the valve body is connected with the upper portion of the tail end of the valve element through a connecting pipe, the section of the valve element is of a U shape, and the inner side of the top of the valve element is in interference fit with a hydraulic cylinder through a seal sleeve. The front portion of the hydraulic cylinder is connected with a piston, an arc plugging block matched with the piston is arranged in the valve body, and the hydraulic cylinder is connected with a flow control valve and a proportion amplification valve through an oil pipe. The flow control valve and the proportion amplification valve are connected with the hydraulic cylinder, the hydraulic cylinder is connected with a motor, the flow control valve and the proportion amplification valve are connected with a controller, and the controller is connected with a monitoring module. The monitoring module is formed by a flow monitor, a pressure monitor and a combustible gas detector. The cut-off valve can realize real-time monitoring, the cut-off reaction speed is high, the cut-off sealing performance can be kept permanently, and the cut-off valve still has a high sealing property, reaction sensitivity and action reliability in severe environments.

Description

technical field [0001] The invention belongs to the technical field of the invention, and in particular relates to a corrosion-resistant cut-off valve. Background technique [0002] Shut-off valves are widely used in petroleum, chemical, metallurgical and other industrial production departments, especially in long-distance pipelines for transporting crude oil, refined oil, natural gas and other chemical products. If they are damaged and a large number of products leak out, it will cause huge damage. Potential safety hazards and property losses can cause casualties in severe cases. To solve this problem, the existing technology is to install a quick shut-off valve on the long-distance pipeline. Once the line pipe is damaged and the pipeline pressure drops sharply, the shut-off valve is quickly closed to reduce losses. , but the response speed of the shut-off valve in the prior art is not sensitive enough, and the sealing effect will decrease after long-term use. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/38F16K37/00
CPCF16K1/00F16K1/38F16K37/0091
Inventor 竺柏康高建丰文建军李翠翠王曙光郑娟
Owner ZHEJIANG OCEAN UNIV
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