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An anti-friction flat gate valve

A flat gate valve, anti-friction technology, applied to valve details, valve devices, sliding valves, etc., can solve the problems of increased cost, short service life, enlarged external drive device, etc., and achieve the effect of preventing jamming and long service life

Active Publication Date: 2019-12-24
YUHUAN DADI COPPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the gate, and the medium pushes the gate to press the valve seat to form a seal. The disadvantage is that during the process of opening and closing the valve, the gate and the valve There will be friction between the valve seat, which will easily lead to frictional damage between the gate sealing surface and the valve seat sealing surface, and the service life will be short. The required external driving device is increased, and the cost is increased

Method used

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  • An anti-friction flat gate valve

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Embodiment Construction

[0012] according to figure 1 It can be seen that the anti-friction flat gate valve includes: valve body 1, left valve seat 10, right valve seat 2, gate plate 11, valve cover 13, valve stem 12, packing 14, packing pad 15, bracket 16, hand wheel 17. Stem nut 18 and nut gland 19. The valve cover 13 is arranged at the upper end of the middle part of the valve body 1. The upper end of the valve cover 13 is provided with a downwardly concave packing groove. The packing 14 is fixed and installed in the packing groove by the packing pad 15. The bracket 16 is fixedly installed on the upper end of the bonnet 13, and a concave groove is provided at the upper end of the bracket 16, and the lower part of the valve stem nut 18 is placed in the concave groove, and the nut gland 19 is installed in the concave groove by threads, and the nut gland 19 Limit the upward and downward movement of the valve stem nut 18, the valve stem nut 18 is provided with a trapezoidal internal thread, the handwhe...

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Abstract

The invention relates to an anti-friction flat plate gate valve. The anti-friction flat plate gate valve is characterized in that an anti-friction adjusting device is further arranged in an inner cavity of a valve body and comprises a lower guide rod, a lower bevel gear, a left bevel gear and a right bevel gear, the lower guide rod is of a round rod type structure; the upper end of the lower guiderod is fixed on the lower end face of a valve rod, a ball head is arranged at the lower end of the lower guide rod, the lower bevel gear is arranged below a gate plate, a left valve base and a rightvalve base, the lower bevel gear is provided with an inner hole, and the lower end of the lower guide rod stretches into the inner hole; the inner hole wall is provided with a spiral groove of a spiral structure, and the ball head stretches into the spiral groove; the left bevel gear and the right bevel gear are arranged on the left sides of the left valve base and the right valve base and on theright sides of the left valve base and the right valve base respectively; the left bevel gear, the right bevel gear, the left valve base and the right valve base form a thread type connecting structure; and a gear connecting structure is formed among the left bevel gear, the right bevel gear and the lower bevel gear. The anti-friction flat plate gate valve has the beneficial effects of being longin service life and saving strength during opening and closing.

Description

technical field [0001] The invention relates to a flat gate valve, in particular to an anti-friction flat gate valve. Background technique [0002] The slab gate valve is a sliding valve whose closing parts are parallel gates. The closing part is generally composed of a gate and a valve seat. The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the gate, and the medium pushes the gate to press the valve seat to form a seal. The disadvantage is that during the process of opening and closing the valve, the gate and the valve There will be friction between the valve seat, which will easily lead to frictional damage between the gate sealing surface and the valve seat sealing surface, and the service life will be short. The required external driving device is increased, and the cost is increased. Contents of the invention [0003] Aiming at the technical defects in the prior art, the invention provides an anti-friction flat gate val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/20F16K31/50
CPCF16K3/0254F16K3/20F16K31/508
Inventor 李琼
Owner YUHUAN DADI COPPER IND
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