Non-wear sealing plug valve

A non-abrasive technology for cock valves, which is applied in the direction of cocks including cut-off devices, valve devices, engine components, etc., can solve the problems of easy wear on the sealing surface, short service life, leakage of the sealing surface, etc., and achieve good sealing performance and use Long life and enhanced sealing effect

Active Publication Date: 2017-05-31
MUDANJIANG CITY LINHAI PETROLEUM REFLOATATION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape of the valve plug of the plug valve is generally conical, and the channel is trapezoidal. The disadvantage is that the sealing surface of

Method used

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Embodiment Construction

[0013] according to figure 1 , figure 2 It can be seen that a wear-free sealing plug valve of the present invention includes a valve body 1, a valve plug 4, a valve cover 9 and a valve stem 10. The valve body 1 is a fluid inner cavity, and a frustum-shaped structure is provided at the inner cavity wall. On the sealing surface of the valve body, the valve plug 4 has a frustum-shaped structure. The valve plug sealing surface of the channel in the plug, the valve cover 9 has a plate structure, and is fixedly installed on the upper end of the valve body 1. There is a limit groove at the bottom of the valve body cavity. The limit groove is centered on the center line of the valve plug 4 to form a central angle of 90 ° fan-shaped structure, the lower end of the valve plug 4 is provided with a limit rod 3, the limit rod 3 extends into the limit groove, and a tension spring 2 is provided between the bottom end surface of the valve plug 4 and the bottom end surface of the valve inner...

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Abstract

The invention relates to a non-wear sealing plug valve. The non-wear sealing plug valve comprises a valve body, a valve plug, a valve deck and valve rods. The non-wear sealing plug valve is characterized in that a limiting groove is formed in the bottom of an inner cavity of the valve body; a limiting rod and an extension spring are arranged at the lower end of the valve plug, a regulation groove is formed in the outer circle of the upper end of the valve plug, a lifting block is further arranged at the upper end of the valve plug, and a groove is formed below the lifting block; the valve rods include the upper valve rod and the lower valve rod, the upper end of the upper valve rod is connected with an external driving device, and the lower end of the upper valve rod is fixedly mounted at the upper end of the lower valve rod; reset springs are arranged between the upper end face of the lower valve rod and the lower end face of the valve deck, a regulation rod which can stretch into the regulation groove is arranged at the lower end of the lower valve rod, and the lower valve rod is further provided with compression springs and balls; and the outer end faces of the balls make contact with the wall of an inner cavity of the valve body, and two clamping grooves are formed in the wall, above the balls, of the inner cavity of the valve body and symmetrically distributed with the center line of the lower valve rod as the center. The non-wear sealing plug valve is provided with a valve plug sealing surface and a valve body sealing surface, and friction is avoided; and the non-wear sealing plug valve has the advantages that wear of the sealing surfaces is avoided, airtightness is good, and the service life is long.

Description

technical field [0001] The invention relates to a valve, in particular to a wear-free sealing plug valve. Background technique [0002] The plug valve is a closing member or a plunger-shaped rotary valve. By rotating 90°, the channel port on the valve plug communicates with or separates from the channel port on the valve body to realize opening or closing. The valve plug of the plug valve is generally conical in shape, and the channel is trapezoidal. The disadvantage is that the sealing surface of the conical valve plug is prone to wear during the opening and closing process, resulting in leakage of the sealing surface and a short service life. Contents of the invention [0003] Aiming at the defects existing in the prior art, the present invention provides a valve plug with no friction between the sealing surface of the valve plug and the sealing surface of the valve body in the process of opening and closing, no abrasion on the sealing surface, good sealing performance a...

Claims

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Application Information

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IPC IPC(8): F16K5/02F16K5/08
CPCF16K5/02F16K5/0207
Inventor 李祥庆
Owner MUDANJIANG CITY LINHAI PETROLEUM REFLOATATION INSTR
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