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Sand-proofing valve

A valve body and valve cavity technology, applied in the field of sand-proof valves for oil wells, can solve problems such as easy damage to the valve seat and the soft sealing ring of the gate, easy entry of sand-containing impurities into the valve cavity, and inability of the pressure oil to seal. , to achieve the effect of good sealing, enhancing overall stability, enhancing tightness and sealing

Active Publication Date: 2013-11-27
王艳龙
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the valve mainly prevents sandy impurities from entering the valve cavity by closing the diversion hole on the gate plate with the cover plate, but in the actual use process, there are still the following defects: 1. The valve cavity of the valve is filled with Pressure oil, but the pressure oil can not play a sealing role, resulting in a gap between the valve seat and the gate; 2. Long-term use is easy to damage the soft sealing ring between the valve seat and the gate, making the gap between the valve seat and the gate The seal fails, and sandy impurities are easy to enter the valve cavity; 3. The spring on the valve seat is prone to failure after long-term use, and is easily corroded by hydrogen sulfide in the medium, which affects the service life of the valve

Method used

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  • Sand-proofing valve

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Embodiment 1

[0023] An anti-sand valve, comprising a valve body 1, a valve seat and a gate plate 2, the valve body 1 is provided with a valve cavity 3 and a medium circulation channel 5, the gate plate 2 is located in the valve cavity 3, and the valve cavity 3 is filled with sealing grease , the valve seat includes two inner valve seats 6 and two outer valve seats 7, the two outer valve seats 7 are embedded in the flow channel 5, and the two inner valve seats 6 are respectively embedded in the Inside the two outer valve seats 7, and the two inner valve seats 6 are fixedly arranged on both sides of the gate plate 2, an O-ring 11 is arranged between the outer valve seats 7 and the valve body 1, and the inner valve seats 6 An O-ring 11 is arranged between the outer valve seat 7, and the lower part of the two inner valve seats 6 extends vertically to form a sand-proof baffle 8 for closing the diversion hole 9 of the gate plate 2, preventing the 2 When the circulation passage 5 is closed, the s...

Embodiment 2

[0030] An anti-sand valve, comprising a valve body 1, a valve seat and a gate plate 2, the valve body 1 is provided with a valve cavity 3 and a medium circulation channel 5, the gate plate 2 is located in the valve cavity 3, and the valve cavity 3 is filled with sealing grease , the valve seat includes two inner valve seats 6 and two outer valve seats 7, the two outer valve seats 7 are embedded in the flow channel 5, and the two inner valve seats 6 are respectively embedded in the Inside the two outer valve seats 7, and the two inner valve seats 6 are fixedly arranged on both sides of the gate plate 2, an O-ring 11 is arranged between the outer valve seats 7 and the valve body 1, and the inner valve seats 6 An O-ring 11 is arranged between the outer valve seat 7, and the lower part of the two inner valve seats 6 extends vertically to form a sand-proof baffle 8 for closing the diversion hole 9 of the gate plate 2, preventing the 2 When the circulation passage 5 is closed, the s...

Embodiment 3

[0032]An anti-sand valve, comprising a valve body 1, a valve seat and a gate plate 2, the valve body 1 is provided with a valve cavity 3 and a medium circulation channel 5, the gate plate 2 is located in the valve cavity 3, and the valve cavity 3 is filled with sealing grease , the valve seat includes two inner valve seats 6 and two outer valve seats 7, the two outer valve seats 7 are embedded in the flow channel 5, and the two inner valve seats 6 are respectively embedded in the Inside the two outer valve seats 7, and the two inner valve seats 6 are fixedly arranged on both sides of the gate plate 2, an O-ring 11 is arranged between the outer valve seats 7 and the valve body 1, and the inner valve seats 6 An O-ring 11 is arranged between the outer valve seat 7, and the lower part of the two inner valve seats 6 extends vertically to form a sand-proof baffle 8 for closing the diversion hole 9 of the gate plate 2, preventing the 2 When the circulation passage 5 is closed, the sa...

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Abstract

The invention discloses a sand-proofing valve comprising a valve body, a valve seat and a gate. A cavity and a medium flowing channel are arranged in the cavity. The gate is located in the gate. The valve seat comprises two inner valve seats and two outer valve seat; the two outer valve seats are arranged in the flowing channel in an embedded manner, and the two inner valve seats are arranged in the two outer valve seats in an embedded manner and are fixed on two sides of the gate. The lower portions of the two inner valve seats extend vertically to form sand-proofing baffles used for sealing a diversion hole of the gate. A baffling ring is fixed at the connection of the outer valve seats and the inner valve seats. By the aid of the sand-proofing valve, sand and impurities can be prevented from entering the cavity, and service life of the valve can be prolonged.

Description

technical field [0001] The invention relates to a gate valve, in particular to a sand prevention valve for oil wells. Background technique [0002] The gate valve used in the existing oil production wellhead device mainly controls the upward and downward movement of the gate through the hand wheel to open or close the medium circulation channel in the valve body. The gate valve is generally composed of a valve body, a valve seat, a valve cover, a gate plate, a valve stem, a handwheel and sealing grease, etc., and a flow channel is arranged in the valve body. For example, Chinese Patent No. "95242613.7" discloses a pressure oil sealed flat gate valve Its public date is December 27, 1995, and its technical proposal is that the gate valve includes a valve body, a valve seat matched with it, a gate installed in the valve body, a valve stem connected to the gate, a lifting mechanism, and a seal . Wherein the lower part of the valve seat is extended to form a cover plate with th...

Claims

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Application Information

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IPC IPC(8): F16K3/02F16K3/30
Inventor 石文生王艳龙蒋永义
Owner 王艳龙
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