A dynamic fit leakage controller for valves

A dynamic fit and controller technology, applied to valve details, valve devices, engine components, etc., can solve the problem of power drive power and energy waste in the selection of sealing packing, backward technology of valve kinematic pair and sealing fit, sealing structure and sealing Cooperate with optimization and other issues to achieve the effect of ensuring the dynamic sealing effect, improving the integrity rate and improving the reliability

Active Publication Date: 2017-10-10
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) If the packing is not compressed, the internal medium will leak from the gland;
[0004] (2) If the packing is pressed too tightly, although the leakage is eliminated, the movement resistance of the dynamic fit will be increased at the same time, and the corresponding resistance moment of the valve opening or closing will also be greatly increased;
[0005] (3) Since the higher the system pressure, the tighter the packing needs to be pressed, the greater the movement resistance of the dynamic fit, and correspondingly, a larger reducer and power machine need to be selected, resulting in high power consumption.
[0006] It can be seen that the sealing characteristics of the sealing packing of the existing traditional valves lead to the waste of the power and energy of the optional power drive.
In addition, the sealing effect of traditional valves is completed by debugging on the compression test bench after the packing is compressed. It is inevitable that the dynamic sealing packing will leak during use after leaving the factory. Naturally, it is necessary to adjust and install the packing by on-site personnel. Or replacement, it is this factor that changes the "inherent matching state of the valve during the test bench pressure test", and thus changes the matching accuracy of the shaft and the hole, thereby changing the best matching state of the valve core and the valve body before leaving the factory. Different degrees of internal leakage problems will inevitably occur
Based on the various defects of the above traditional valves, those skilled in the art know that the reliability of using such valves in key processes is very low
[0007] At present, hydraulic technology at home and abroad has been widely developed, and the solution to high-pressure dynamic fit is not limited to the technical solution of packing sealing and compacting. However, in the valve manufacturing industry, many companies are researching better sealing packing, but there is no Pay attention to the optimization of the sealing structure and sealing fit, so that the technology of the kinematic pair and sealing fit in the valve is backward, resulting in inefficiency and waste of such products

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  • A dynamic fit leakage controller for valves
  • A dynamic fit leakage controller for valves

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Embodiment Construction

[0023] In order to make the technical solution of the present invention easier to be understood clearly, it will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] See figure 1 The dynamic fit leakage controller of the present invention includes a main body part and a fixture part, and the main body part and the fixture part are connected to each other and can be separated from each other when needed, and the separation of the two does not affect their independent functions.

[0025] The main body part includes a power end shaft 1, a square hole is opened at the bottom of the power end shaft 1, and an upper end cover flange 5 and a lower end cover flange 8 are installed on the upper and lower ends of the power end shaft 1, respectively. The upper end cover flange 5 and the lower end cover flange 8 are respectively inlaid with the input end bearing 2 and the output end bearing 16 for positioning and centering the power end shaft 1, the ...

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Abstract

The invention discloses a movable fit leakage controller for a valve. The controller comprises a body part and a clamp part. The body part comprises a power end shaft and an upper end cover flange and a lower end cover flange which are arranged at the two ends of the power end shaft, bearings are embedded to the upper end cover flange and the lower end cover flange, the upper end cover flange, the lower end cover flange and a shell arranged between the upper end cover flange and the lower end cover flange form a sealing cavity, and the sealing cavity is internally provided with a dynamic / static sealing pair composed of a dynamic sealing ring and a static sealing ring; the clamp component comprises a clamp body, wherein a valve shaft mounting hole formed in the center of the clamp body, the valve shaft mounting hole is internally provided with a pair of semicircular-ring-shaped sealing slips, the two sides of the valve mounting hole are provided with transverse bolt holes which are symmetrical to each other and penetrate through the outer diameter of the semicircular-ring-shaped sealing slips, and the two transverse bolt holes are internally provided with adjusting bolts. The movable fit leakage controller has the advantages that a sealing mode of a traditional valve is changed, no filler or sealing device is needed, and the dynamic sealing effect of the valve can be guaranteed, so that various defects of a sealing mode in the prior art are overcome.

Description

Technical field [0001] The present invention relates to a leakage controller, and more specifically, the present invention relates to a dynamic fit leakage controller for valves and capable of changing the sealing mode of traditional valves. Background technique [0002] At present, the valve body and its built-in valve core of industrial valves need to open or close the valve through the twitch of the valve stem or the rotation of the valve shaft. For existing traditional valves, the sealing of the dynamic fit between the shaft holes is usually achieved by relying on various packings and external forces of the gland to deform and fill the dynamic fit space of the shaft hole. The biggest drawback of this method is that it increases the movement resistance of the dynamic fit, and even: [0003] (1) If the packing is not compacted, the internal medium will leak from the gland; [0004] (2) If the packing is compressed too tightly, although the leakage is eliminated, the movement resi...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F16K41/06
CPCF16K41/063
Inventor朱志强
OwnerNORTHEAST GASOLINEEUM UNIV