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Assembling method of scraper stop valve

An assembly method and globe valve technology, applied in valve devices, lift valves, engine components, etc., can solve the problems such as the inability of the sealing surface of the valve disc and the sealing surface of the valve seat to be tightly combined, the easy damage to the sealing pair, and the short service life. To achieve the effect of good sealing, enhanced valve life and long service life

Active Publication Date: 2017-06-09
李祥庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As an extremely important cut-off valve, the globe valve is sealed by applying torque to the valve stem, and the valve stem exerts pressure on the valve disc in the axial direction, so that the sealing surface of the valve disc and the sealing surface of the valve seat fit closely, preventing The medium leaks along the gap between the sealing surfaces. The sealing pair of the globe valve is composed of the disc sealing surface and the valve seat sealing surface. The valve stem drives the valve disc to move vertically along the center line of the valve seat. When the valve is used in viscous ore slurry containing solid particles, the medium is easy to stick to the sealing pair, so that the sealing surface of the disc and the seat cannot be tightly combined, resulting in leakage. At the same time, the solid particles contained in the medium are trapped On the sealing pair, it is easy to damage the sealing pair and the service life is short

Method used

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  • Assembling method of scraper stop valve
  • Assembling method of scraper stop valve
  • Assembling method of scraper stop valve

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Embodiment Construction

[0028] according to figure 1 , figure 2 and image 3It can be seen that a cut-off valve with a scraper in the present invention includes: a valve body 1, a valve seat 2, an outer valve stem 7, a valve disc 5 and a valve cover 9, and the valve body 1 is provided with an inlet flow channel, an outlet flow channel and a middle cavity. The outlet channel communicates with the middle cavity, the valve seat 2 is set at the outlet end of the inlet channel, the upper end of the valve seat 2 is provided with a valve seat sealing surface, the valve seat 2 is provided with an inner cavity, and the valve cover 9 is fixedly installed on the upper end of the middle part of the valve body 1, The middle part of the bonnet 9 is provided with a stuffing box, and a packing 10 and a packing gland 11 are installed at the stuffing box. The packing gland 11 presses the packing 10 downwards. There is a groove, and a valve stem nut 15 and a limit sleeve 13 are arranged at the groove, and the limit ...

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PUM

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Abstract

The invention relates to an assembling method of a scraper stop valve. The assembling method comprises the following steps: a, cleaning components by using clean water, and blow-drying by using a dryer; b, assembling a valve body and a valve seat; c, assembling an external valve rod, a valve clack and other components; d, assembling an internal valve rod, a scraper assembly, a plug head and other components; e, assembling an assembly obtained in the step c and an assembly obtained in the step d; f, assembling a valve cover assembly, and integrally assembling; g, assembling a valve rod nut, a limiting sleeve, a big hand wheel and other components; h, assembling a small hand wheel and other components; i, performing a pressure test; j, blow-drying the scraper stop valve passing the test, then painting, performing lead sealing, and storing. The assembling method has the advantages of convenience in mounting, high accuracy and high qualified rate.

Description

technical field [0001] The invention relates to a shut-off valve, in particular to an assembly method for a shut-off valve with a scraper. Background technique [0002] As an extremely important cut-off valve, the globe valve is sealed by applying torque to the valve stem, and the valve stem exerts pressure on the valve disc in the axial direction, so that the sealing surface of the valve disc and the sealing surface of the valve seat fit closely, preventing The medium leaks along the gap between the sealing surfaces. The sealing pair of the globe valve is composed of the disc sealing surface and the valve seat sealing surface. The valve stem drives the valve disc to move vertically along the center line of the valve seat. When the valve is used in viscous ore slurry containing solid particles, the medium is easy to stick to the sealing pair, so that the sealing surface of the valve disc and the seat sealing surface cannot be tightly combined, resulting in leakage, and the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/36F16K1/32F16K1/46
CPCF16K1/32F16K1/36F16K1/46
Inventor 李祥庆
Owner 李祥庆
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