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Balance trunnion type connection rod valve spool

A technology of trunnions and spools, applied to valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as seal wear and thermal effects, and achieve the effects of increasing frictional contact area, increasing surface area, and improving rigidity

Inactive Publication Date: 2013-02-20
镇江市华阳机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent with the patent number of 200720080906.4 discloses an integral spool valve stem. This technical solution is mainly to set the spool and the valve stem as a whole. There are still seal wear issues and thermal effects

Method used

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  • Balance trunnion type connection rod valve spool
  • Balance trunnion type connection rod valve spool

Examples

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Embodiment 1

[0013] This embodiment provides a balanced trunnion type connecting rod valve core, such as figure 1 As shown, it includes a cylindrical valve stem 1 and a spherical valve core 3 connected together; an upper trunnion 2 is arranged between the valve stem 1 and the valve core 3, and the upper trunnion 2 is cylindrical, and the diameter of the upper trunnion 2 is larger than that of the valve. The diameter of the rod 1 is smaller than the diameter of the cross-section of the valve core 3; the bottom of the valve core 3 is provided with a lower trunnion 4 symmetrical to the upper trunnion 2, the valve stem part 1, the upper trunnion 2, the valve core 3 and the lower trunnion 4 axes lie on the same straight line.

[0014] Such as figure 2 As shown, since this technical solution adopts the design of the balanced trunnion connecting rod valve core, the upper trunnion 2 and the lower trunnion 4 are added without increasing the diameter of the valve stem 1. Large, this improvement g...

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Abstract

The invention relates to a balance trunnion type connection rod valve spool which comprises a cylindrical valve rod and a spherical valve spool, wherein the cylindrical valve rod and the spherical valve spool are integrally connected, a cylindrical upper trunnion is arranged between the valve rod and the valve spool, and the diameter of the upper trunnion is larger than that of the valve rod and smaller than that of the cross section of the valve spool. A lower trunnion symmetrical to the upper trunnion is arranged at the bottom of the valve spool, and axes of the valve rod, the upper trunnion and the lower trunnion are located on the same straight line. The upper and lower balance trunnion type design is adopted so that the valve spool is evenly stressed vertically, the stuffing sealing deformation problem caused by valve spool position offset is well solved, valve spool leakage probability is reduced, valve service life is prolonged, and valve safety and reliability are improved. The friction contact area of the upper trunnion and a stuffing sealing port is enlarged on the premise of not enlarging the valve rod diameter, thermal cyclicity is improved, and the thermal effect is reduced to the lowest.

Description

technical field [0001] The invention relates to a connecting rod valve core, in particular to a balanced trunnion type connecting rod valve core, which belongs to the technical field of valve manufacturing. Background technique [0002] As we all know, the valve can only open and close the flow path when the spool is well sealed; once the spool seal is faulty, the valve will leak at least, and the function of closing the flow path will be completely lost at worst; so in When designing and installing the valve, the packing must be tightly pressed on the valve core and valve handle to achieve a good sealing effect; due to the need to overcome the sliding friction between the packing, the valve core and the valve handle and the radial Therefore, a large torque is required to open or close the valve; if the force of rotating the valve is too large, it is easy to cause a small amount of displacement of the valve core. Once the displacement exceeds the floating elastic limit of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/08
Inventor 陈雨民
Owner 镇江市华阳机电制造有限公司
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