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A ceramic plug valve

A cock valve and ceramic technology, which is applied in the field of ceramic cock valves, can solve the problems of short service life of metal cock valves, wear gap between valve core and middle body, and high cost of use, and achieve good sealing performance, smooth switching and low cost of use. Effect

Active Publication Date: 2017-07-28
烟台明珠陶瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plug valves have the advantages of high temperature resistance, corrosion resistance, wear resistance, erosion resistance, etc., and are widely used in various acid-base salt gases, liquids, high-temperature steam and In the slurry delivery system, after a long period of use, the ordinary metal cock valve will wear out between the valve core and the middle body to form a gap and cause leakage, and the greater the valve pressure, the greater the torque, and it can only be scrapped, so the metal cock valve exists The problem of short service life and high cost of use

Method used

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  • A ceramic plug valve
  • A ceramic plug valve
  • A ceramic plug valve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the ceramic plug valve of this embodiment, refer to figure 1 , including a metal shell 1, an upper end cap 8 is screwed on the top of the shell 1, a lower end cap 9 is screwed on the bottom of the shell 1, a middle body 2 of ceramics or other non-metallic materials is arranged inside the shell 1, and the inner body 2 Tightly match the ceramic valve core 3, the center of the upper end surface of the valve core 3 is provided with a valve stem hole, the valve stem 4 passes through the upper end cover 8 to cooperate with the valve stem hole; the middle part of the valve core 3 is provided with a circular or V-shaped through hole 6, if The spool is divided into upper and lower parts on the basis of the through hole 6, and the spool 3 is in the shape of an upper taper with a thick top and a thin bottom or a lower taper with a thin top and a thick bottom, and the taper is 0-20 degrees. It is characterized in that: the spool 3. Inverted bevel or circular arc at th...

Embodiment 2

[0022] Embodiment 2, the ceramic plug valve of this embodiment, refer to figure 2 , the others are the same as in Embodiment 1, the difference is: the center of the thick end surface of the spool 3 is provided with a pressure relief hole 7 communicating with the through hole 6, and the pressure relief hole 7 is a straight hole, which is connected to the groove or arc. The combined effect of the size and the angle makes the tapered end area of ​​the upper and lower parts of the spool equal to the area of ​​the upper and lower parts inside the through hole 6 of the spool.

Embodiment 3

[0023] Embodiment 3, the ceramic plug valve of this embodiment, refer to image 3 , the others are the same as in Embodiment 2, the difference is that the pressure relief hole 7 is a stepped hole, including a thin section pressure relief hole 71 close to the thin end surface of the valve core and a thick section pressure relief hole 72 close to the thick end surface of the valve core, and the thick section pressure relief hole 72 is close to the thick end surface of the valve core. The pressure hole 72 is filled with a decompression plunger. The joint effect of the thin section pressure relief hole 71, the thick section pressure relief hole 72 and the size and angle of the groove or arc makes the upper and lower areas of the upper and lower parts of the valve core in the conical end area of ​​the valve core through hole 6 equal.

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Abstract

The invention relates to a ceramic plug valve, which comprises a metal shell, wherein an upper end cover is screwed above the shell; a lower end cover is screwed below the shell; a ceramic or other nonmetal material middle body is arranged in the shell; a ceramic valve element is tightly matched in the middle body; a valve rod hole is formed in the center of the upper end face of the valve element; a valve rod penetrates through the upper end cover and is matched with the valve rod hole; a circular or V-shaped through hole is formed in the middle of the valve element; the valve element is divided into an upper part and a lower part by taking the through hole as a basis, the valve element is an upper cone with thick upper part and thin lower part or a lower cone with thin upper part and thick lower part, and the taper is 0-20 degrees. The ceramic plug valve is characterized in that the joint between the thick end face of the valve element and the side face is provided with a groove or arc. Compared with the prior art, the ceramic plug valve has the advantages that the structural design is reasonable; the service life is long; the cost is low; no torque is produced by the valve under any pressure and only area friction force is produced; and the ceramic plug valve has the advantages of wear resistance, erosion resistance, corrosion resistance, high temperature resistance and the like.

Description

technical field [0001] The invention relates to a control component in a fluid delivery system, in particular to a ceramic plug valve. Background technique [0002] The plug valve is a closing member or a plunger-shaped rotary valve. By rotating 90 degrees, 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 shape of the valve plug of the plug valve can be cylindrical or conical. In cylindrical plugs, the passages are generally rectangular; in tapered plugs, the passages are trapezoidal. These shapes make the structure of the plug valve light. Plug valves have the advantages of high temperature resistance, corrosion resistance, wear resistance, erosion resistance, etc., and are widely used in various acid-base salt gases, liquids, high-temperature steam and In the slurry delivery system, after a long period of use, the ordinary metal cock valve will wear out between the valve core and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/04F16K5/08
CPCF16K5/0407F16K5/08
Inventor 步志俊
Owner 烟台明珠陶瓷科技有限公司
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