CN201705948U - Special valve for chlorine of maintenance-free bellows - Google Patents
Special valve for chlorine of maintenance-free bellows Download PDFInfo
- Publication number
- CN201705948U CN201705948U CN2010201839514U CN201020183951U CN201705948U CN 201705948 U CN201705948 U CN 201705948U CN 2010201839514 U CN2010201839514 U CN 2010201839514U CN 201020183951 U CN201020183951 U CN 201020183951U CN 201705948 U CN201705948 U CN 201705948U
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- Prior art keywords
- valve
- bellows
- maintenance
- valve body
- alloy layer
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- Expired - Lifetime
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Abstract
The utility model provides a special valve for chlorine of a maintenance-free bellows, relating to a valve body, and comprising the valve body, a valve seat, a valve flap, a cylindrical valve cover, a bellows, a valve rod, a packing gland and a hand wheel, wherein a cylinder cover cap is arranged between the bellows and the valve cover; the upper end of the cylinder cover cap is welded with the upper ends of the bellows and the valve cover, and the lower end thereof is fixed with a flying edge protruding outward; the flying edge is arranged between the valve cover and the valve body, and a gasket is arranged between the flying edge and the valve body; the upper surface of the valve seat is provided with a ring-shaped groove which is internally provided with a sealing piece; and the surface of the valve flap is provided with a hard alloy layer which is matched with the sealing piece on the surface of the valve seat. By the design, the upper end of the bellows is provided with the cylinder cover cap, so that the fluid can be controlled in a valve body cavity effectively, and the leaking points are reduced and the maintenance is free. The special valve has the advantages of good sealing performance, difficult fall and leakage, long service life, safety and reliability.
Description
Technical field
The utility model relates to a kind of valve body, promptly relates to control and the mobile maintenance-free corrugated tube valve special for chlorine door of adjusting on a kind of chemical enterprise pipeline.
Background technique
At present, the valve that China's chemical enterprise is used for deep-etching flowing medium controls such as chlorine, liquid chlorine mostly is common Chlorine stop valve greatly, in design unreasonable of form and structure owing to be tightly connected, the Sealing damage that easily comes off is easily leaked in the using process, even security incident takes place, valve is short working life, safeguard and change frequently that influence is produced, and causes economic loss.
The model utility content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of sealing configuration novelty to be provided, and good seal performance is safe and reliable, the maintenance-free corrugated tube valve special for chlorine of long service life.
The purpose of this utility model is achieved in that maintenance-free corrugated tube valve special for chlorine, comprise valve body, valve seat, flap, cylindrical valve gap, bellows, valve rod, Gland, handwheel, the cylindrical body block is set between described bellows and the valve gap, the upper end welding of the upper end of described cylindrical body block and bellows and valve gap, the fixing overlap that outwards protrudes in the lower end of cylindrical body block, described overlap is arranged between valve gap and the valve body, between described overlap and the valve body pad is set; The upper surface of described valve seat is provided with annular groove, and Sealing is set in annular groove; Described flap surface is provided with hard alloy layer, and hard alloy layer matches with the Sealing of valve base surface.
The utility model is by above design, and the bellows upper end is equipped with the cylindrical body block, can be controlled at fluid in the valve body cavity effectively, reduces leakage point, removes maintenance from.Valve seat through being processed into a plane and an annular groove, is provided with Sealing in the groove behind the anti-corrosion cemented carbide of plasma spray.Flap surface plasma surfacing has anti-corrosion hard alloy layer, and the cemented carbide on the Sealing of above-mentioned cemented carbide and valve base surface and the valve base cavity plane forms two seals effectively when valve closing.The utility model good seal performance, difficult drop-off, the difficult leakage.Long service life, frequency of maintenance is low.Flap, valve seat frictional behaviour are good, safe and reliable.
For better sealing, the inner chamber plane of described valve seat is provided with anti-corrosion hard alloy layer.
In like manner, the hard alloy layer on described flap surface is become with the plane structural group by the awl plane structure.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is a partial structurtes schematic representation of the present utility model.
Fig. 3 is the structural representation of flap and valve seat.
Embodiment
As shown in Figure 1, 2, 3, be maintenance-free corrugated tube valve special for chlorine, comprise valve body 1, valve seat 2, flap 3, cylindrical valve gap 8, bellows 7, valve rod 5, Gland 10, handwheel 15.
Between valve rod 5 and the bellows 7 ring packing filler 9 is set, the upper end of bellows 7 is welded on the upper end of valve gap 8, and the lower end of bellows 7 is welded on valve rod 5 and the flap 3.Cylindrical body block 6 is set between bellows 7 and the valve gap 8, the upper end welding of the upper end of cylindrical body block 6 and bellows 7 and valve gap 8, the fixing overlap 11 that outwards protrudes in the lower end of cylindrical body block 6, overlap 11 is arranged between valve gap 8 and the valve body 1, between overlap 11 and the valve body 1 pad 16 is set.
The upper surface of valve seat 2 is provided with annular groove 2-1, and Sealing 18 is set in annular groove 2-11, and the inner chamber plane of valve seat 2 is provided with anti-corrosion hard alloy layer 21.Flap 3 surfaces are provided with hard alloy layer 31, and hard alloy layer 31 matches with the Sealing 18 on valve seat 2 surfaces.
The hard alloy layer 31 on flap 3 surfaces is become with the plane structural group by the awl plane structure, wherein bores the plane structure cone angle and can be made as 65 °.Hard alloy layer 31 is sintered to one with flap 3 basic plasma sprays.
During use, be rotated counterclockwise handwheel 15, drive valve rod 5, flap 3 move upward, by valve body 1, the cemented carbide on flap 3 surfaces is because one deck is the awl plane structure through valve seat 2 for valve opening, medium, when valve closing, have guidance quality preferably, guarantee valve seal.
Claims (3)
1. maintenance-free corrugated tube valve special for chlorine, comprise valve body, valve seat, flap, cylindrical valve gap, bellows, valve rod, Gland, handwheel, it is characterized in that: the cylindrical body block is set between described bellows and the valve gap, the upper end welding of the upper end of described cylindrical body block and bellows and valve gap, the fixing overlap that outwards protrudes in the lower end of cylindrical body block, described overlap is arranged between valve gap and the valve body, between described overlap and the valve body pad is set; The upper surface of described valve seat is provided with annular groove, and Sealing is set in annular groove; Described flap surface is provided with hard alloy layer, and hard alloy layer matches with the Sealing of valve base surface.
2. maintenance-free corrugated tube valve special for chlorine according to claim 1 is characterized in that: the inner chamber plane of described valve seat is provided with anti-corrosion hard alloy layer.
3. maintenance-free corrugated tube valve special for chlorine according to claim 1 is characterized in that: the hard alloy layer on described flap surface is become with the plane structural group by the awl plane structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201839514U CN201705948U (en) | 2010-05-10 | 2010-05-10 | Special valve for chlorine of maintenance-free bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201839514U CN201705948U (en) | 2010-05-10 | 2010-05-10 | Special valve for chlorine of maintenance-free bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201705948U true CN201705948U (en) | 2011-01-12 |
Family
ID=43443104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201839514U Expired - Lifetime CN201705948U (en) | 2010-05-10 | 2010-05-10 | Special valve for chlorine of maintenance-free bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201705948U (en) |
-
2010
- 2010-05-10 CN CN2010201839514U patent/CN201705948U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110112 |