CN201651444U - Low-pressure gas vertical lifting check valve - Google Patents
Low-pressure gas vertical lifting check valve Download PDFInfo
- Publication number
- CN201651444U CN201651444U CN2010203017389U CN201020301738U CN201651444U CN 201651444 U CN201651444 U CN 201651444U CN 2010203017389 U CN2010203017389 U CN 2010203017389U CN 201020301738 U CN201020301738 U CN 201020301738U CN 201651444 U CN201651444 U CN 201651444U
- Authority
- CN
- China
- Prior art keywords
- low
- fixed
- valve port
- pressure gas
- vertical lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a low-pressure gas vertical lifting check valve; the upper and the lower ends of a cylinder body are connected with flanges; a vertical shaft is arranged above the lower flange in the cylinder body; the vertical shaft passes through a bracket hollow tube fixed on a valve port; a bracket is fixed at the lower end of the valve port; and the upper end of the vertical shaft is fixed on a clamping plate which is connected with a press cover by a bolt and freely moves above the valve port. The low-pressure gas vertical lifting check valve has simple structure; a valve body is not a casting piece when in production, so that a mould is not needed; the diameter of the valve body can be determined according to the flow rate; and a corresponding seamless steel tube is selected and is welded with the flanges at the two ends to form the valve body. The clamping plate, the press cover and the vertical shaft are made of aluminium materials, so that the influence of self weight for pressure energy is very low. The low-pressure gas vertical lifting check valve has the advantages of simple structure, low manufacturing cost and good effect.
Description
Technical field
The utility model belongs to the part device of gas-fired equipment, particularly a kind of low-pressure gas vertical lifting safety check.
Background technique
Existing safety check is applicable to liquid and the middle and high body of calming the anger more.Mixed gas outlet pressure requires lower, and gas leak phenomenon takes place the safety check that is installed on the low pressure pipeline again and again.In recent years, China's energy saving device more and more is subjected to all circles' attention.LPG mixes air device and is widely used as peak regulation, panic equipment, gas leakage to air conduit can blast, deflagration accident having, so combustion gas mixes in the air system, safety check must be equipped with in the air road, guarantees the safety of mixed gas.When mixed gas system normally moved, air entered the gas equipment that mixes by safety check, entered combustion system with the abundant mixed inflammable gas of combustion gas through pressure regulation.Mix the gas system and mostly be intermittent duty, when stopping to mix gas, fuel gas pipeline and mixed gas storage tank have the gas of certain pressure.Usually mix atmospheric pressure 800～4500mmH
2O, air pipe line are barometric pressure, and high-pressure gas can leak to low pressure line.Safety check is contained in low pressure line, plays the danger that combustion gas is leaked to low pressure line.
The model utility content
Technical problem to be solved in the utility model is: a kind of low-pressure gas vertical lifting safety check is provided.
The technical solution of the utility model is:
A kind of low-pressure gas vertical lifting safety check is characterized in that: the upper and lower end adpting flange of cylindrical shell,
The lower flange top is provided with vertical shaft in the cylindrical shell, and vertical shaft passes the support hollow tube that is fixed on the valve port, and support is fixed on the valve port lower end, the vertical shaft upper end is fixed on the pressure strip, pressure strip is above valve port, and pressure strip is connected by bolt with gland, and is free movable above valve port.
There is stop nut the below of vertical shaft in the cylindrical shell, and stop nut is provided with the cotter pin that installs and fixes.
Support in the cylindrical shell is that the pipe by uniform three round steel and hollow is fixed on the valve port lower end.
Valve port in the cylindrical shell is fixed on the cylindrical shell center.
Rubber plate is fixed in the middle of pressure strip and the gland.
The utility model structural advantages is:
This low-pressure gas vertical lifting safety check, the working principle of safety check is opened during the medium following current, closes during adverse current, and open-shut device promotes gland by media flow and opens voluntarily or close.Its effect is to prevent that the medium in the pipeline from flowing backwards.Valve body production is not foundry goods, does not need mould, determines valve diameter according to the flow size, selects corresponding seamless steel pipe, and the two ends welded flange is as valve body.Pressure strip, gland and vertical shaft material are selected aluminium for use, and main consideration deadweight is accomplished minimum to the influence of pressure energy.Its advantage is: simple in structure, cost is low, and is effective.
Description of drawings
Fig. 1 is a low-pressure gas vertical lifting check valve structure schematic representation
Among the figure: 1 support, 2 bolts, 3 pressure strips, 4 rubber plates, 5 glands, 6 cylindrical shells, 7 flanges, 8 valve ports, 9 vertical shafts, 10 stop nuts, 11, cotter pin
Embodiment
A kind of low-pressure gas vertical lifting safety check as shown in the figure mainly contains cylindrical shell, the upper and lower end of cylindrical shell and flange welding, the lower flange top is provided with vertical shaft in the cylindrical shell, vertical shaft passes the support hollow tube that is fixed on the valve port, support is fixed on the valve port lower end, the vertical shaft upper end is fixed on the pressure strip, and pressure strip is connected by bolt with gland, and is free movable above valve port.
The upper and lower end adpting flange of the cylindrical shell of its concrete structure low-pressure gas vertical lifting safety check, the lower flange top is provided with vertical shaft in the cylindrical shell, vertical shaft passes the support hollow tube that is fixed on the valve port, support is fixed on the valve port lower end, the vertical shaft upper end is fixed on the pressure strip, pressure strip is connected by bolt with gland, and is free movable above valve port.There is stop nut the below of vertical shaft in the cylindrical shell, and stop nut is provided with the cotter pin that installs and fixes pin, and vertical shaft passes the hollow tube of support, is fixed on the pressure strip below.Support in the cylindrical shell is that the pipe by uniform three round steel and hollow is fixed on the valve port lower end.Valve port in the cylindrical shell is fixed on the cylindrical shell center.The valve port top is a pressure strip, pressure strip and gland bolt, and rubber plate is fixed in the middle of pressure strip and the gland.
This low-pressure gas vertical lifting safety check working principle: open during the medium following current, close during adverse current, open-shut device is opened voluntarily or is closed by media flow and strength.Its effect is to prevent that the medium in the pipeline from flowing backwards.Gas enters cylindrical shell from the cylindrical shell end opening when mixing gas system proper functioning, and the gas of certain pressure backs down gland, enters cylindrical shell upper end pipeline by valve port and mixes the gas system; When mixed gas stopped, the valve port upper end had the gas of certain pressure that the rubber plate in the middle of the loam cake is pressed on valve port top, prevents that combustion gas from entering in the air system, mixes atmospheric pressure 800～4500mmH usually
2O, the air road is a barometric pressure, high-pressure gas can leak to low pressure line.Safety check is contained in low pressure line, plays the danger that combustion gas is leaked to low pressure line.
Structure as shown in Figure 1,
This low-pressure gas vertical lifting safety check be after having summed up existing safety check pluses and minuses in conjunction with actual use condition, a kind of safety check that designs.Employing new structure Ao Lida company designs and puts into operation, it all is this type valve that the venturi of Ao Lida design at present mixes the safety check that the air pipe line heavy caliber uses in the gas system, small-bore valve is for transforming the back safety check, and the non-return effect is remarkable, and using did not have leakage phenomenon in about 10 years.
Claims (5)
1. low-pressure gas vertical lifting safety check, it is characterized in that: the upper and lower end adpting flange of cylindrical shell, the lower flange top is provided with vertical shaft in the cylindrical shell, vertical shaft passes the support hollow tube that is fixed on the valve port, support is fixed on the valve port lower end, and the vertical shaft upper end is fixed on the pressure strip, and pressure strip is above valve port, pressure strip is connected by bolt with gland, and is free movable above valve port.
2. low-pressure gas vertical lifting safety check according to claim 1 is characterized in that: there is stop nut the below of vertical shaft in the cylindrical shell, and stop nut is provided with the cotter pin that installs and fixes.
3. low-pressure gas vertical lifting safety check according to claim 1 is characterized in that: the support in the cylindrical shell is that the pipe by uniform three round steel and hollow is fixed on the valve port lower end.
4. low-pressure gas vertical lifting safety check according to claim 1 is characterized in that: the valve port in the cylindrical shell is fixed on the cylindrical shell center.
5. low-pressure gas vertical lifting safety check according to claim 1, it is characterized in that: rubber plate is fixed in the middle of pressure strip and the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017389U CN201651444U (en) | 2010-01-28 | 2010-01-28 | Low-pressure gas vertical lifting check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017389U CN201651444U (en) | 2010-01-28 | 2010-01-28 | Low-pressure gas vertical lifting check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201651444U true CN201651444U (en) | 2010-11-24 |
Family
ID=43116681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010203017389U Expired - Fee Related CN201651444U (en) | 2010-01-28 | 2010-01-28 | Low-pressure gas vertical lifting check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201651444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033590A (en) * | 2015-09-02 | 2015-11-11 | 长江三峡能事达电气股份有限公司 | Machining process of valve body of large-flow cartridge valve |
-
2010
- 2010-01-28 CN CN2010203017389U patent/CN201651444U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033590A (en) * | 2015-09-02 | 2015-11-11 | 长江三峡能事达电气股份有限公司 | Machining process of valve body of large-flow cartridge valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20140128 |