CN2859487Y - Block-prevention purging device for wind pressure measuring - Google Patents
Block-prevention purging device for wind pressure measuring Download PDFInfo
- Publication number
- CN2859487Y CN2859487Y CN 200520074544 CN200520074544U CN2859487Y CN 2859487 Y CN2859487 Y CN 2859487Y CN 200520074544 CN200520074544 CN 200520074544 CN 200520074544 U CN200520074544 U CN 200520074544U CN 2859487 Y CN2859487 Y CN 2859487Y
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- Prior art keywords
- sampling head
- pressure
- flowmeter
- flow control
- pipeline
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- Expired - Fee Related
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Abstract
This utility model discloses a anti-block and blow-sweep device used for wind pressure measureing. Said device comprises of sampling head and pressure transmitter, and the sample tap of sampling head is connected with pressure transmitter via sampling pulse pipe. Its characteristic lies in that it has air source,surge damping valve,flow control valve and flowmeter, among which,the flowmeter is connected with sweep mouth of sampling head via pipeline. Said flowmeter is still connected with flow control valve,surge damping valve and air source through pipeline. The pipeline between surge damping valve and flow control valve is still connected with pressure gauge. This anti-block and blow-sweep device used for wind pressure measureing may prevent sampling head from being block up, ensures the accuracy of result value and safe operation of boiler and is suited for preventing sampling head from being block up when having a negative pressure measurement in coal burning boiler.
Description
(1) technical field
The utility model relates to a kind of wind pressure measurement device.Be to measure to be used for preventing the anti-blocking blow device of wind pressure measurement that sampling head stops up in the coal-burning boiler combustion chamber draft process specifically.
(2) background technology
As everyone knows, for guaranteeing the normal operation of coal-burning boiler, need monitor the negative pressure of burner hearth at any time.Therefore, on coal-burning boiler, all is furnished with the wind pressure measurement device.This wind pressure measurement device contains sampling head, and the sampling head front end inserts in the burner hearth, and its rear end is connected with a pressure unit by pulse tube.Because coal-burning boiler is fuel used to be coal dust, the mouth of pipe that long coal ash of time one can accumulate in sampling head makes its obstruction, influences measurement result, can't guarantee the safe operation of boiler.
(3) utility model content
The technical problems to be solved in the utility model provides the anti-blocking blow device of a kind of wind pressure measurement.The anti-blocking blow device of this wind pressure measurement can prevent that sampling head from stopping up, and guarantees the accuracy of measurement result and the safe operation of boiler.
For addressing the above problem, the utility model is taked following technical scheme:
The anti-blocking blow device of wind pressure measurement of the present utility model comprises sampling head and pressure unit, and the sample tap of sampling head is connected with pressure unit by the sampling pulse pipe.Be characterized in also containing source of the gas, pressure maintaining valve, flow control valve and flowmeter, flowmeter wherein is communicated with the purging mouth of sampling head by pipeline.Said flowmeter also is connected with flow control valve, pressure maintaining valve and source of the gas successively by pipeline.Also be connected to tensimeter on the pipeline between pressure maintaining valve and flow control valve.
Take such scheme, have the following advantages:
Since wind pressure measurement of the present utility model with anti-blocking blow device contain source of the gas,, pressure maintaining valve, flow control valve and flowmeter, flowmeter wherein is communicated with sampling head by pipeline, and its flowmeter is connected with flow control valve, pressure maintaining valve and source of the gas successively by pipeline.Also be connected to tensimeter on the pipeline between pressure maintaining valve and flow control valve.During work, the oil-free compressed air that provides by source of the gas, through moisture trap carry out gas, moisture from after, give pressure maintaining valve.By after the pressure maintaining valve voltage stabilizing, give flow control valve and regulate again, sampling head is purged, the control of dust at sampling head place is blown away.Not only realized anti-blockingly, can also guarantee the accuracy of measuring.Because measurement result is accurate, can guarantee the safe operation of boiler again.
(4) description of drawings
Accompanying drawing is a wind pressure measurement of the present utility model with anti-blocking blow device synoptic diagram.
(5) embodiment
As shown in drawings, wind pressure measurement of the present utility model contains sampling head 12 with anti-blocking blow device and device 4 is sent on the pressure limit, and the sample tap 2 of sampling head 12 wherein is connected with pressure unit 5 by the sampling pulse pipe.The front end of sampling head 12 stretches in the burner hearth after passing furnace wall 1.For preventing that sampling head 12 from stopping up, guaranteeing the accuracy measured, also is provided with source of the gas 6, pressure maintaining valve 8, flow control valve 10 and flowmeter 11.Flowmeter 11 wherein is a spinner-type flowmeter, and it is connected with the purging mouth 3 of sampling head 12 by pipeline.Said flowmeter 11 also is connected with flow control valve 10, pressure maintaining valve 8 and source of the gas 6 successively by pipeline.On the pipeline between pressure maintaining valve 8 and the flow control valve 10, tensimeter 9 is installed also, to be used for supervising at any time the pressure of gas in the side pipe road.
Said source of the gas 6 is provided by power plant.For guaranteeing that flowmeter 11 is not polluted by water, between source of the gas 6 and pressure maintaining valve 8, moisture trap 7 is installed, be used for to source of the gas 6 carry out gas, moisture from.
Owing to have pressure differential between the porch of pressure unit 5 and scavenging duct inlet,, can have a strong impact on the accuracy of measurement result as not compensating.For this reason, pressure compensator 4 is installed, has guaranteed the accuracy of measurement result at pressure unit 5 and 12 of sampling heads.
Claims (4)
1. the anti-blocking blow device of wind pressure measurement comprises sampling head (12) and pressure unit (5), and the sample tap (2) of sampling head (12) is connected with pressure unit (5) by the sampling pulse pipe; It is characterized in that also containing source of the gas (6), pressure maintaining valve (8), flow control valve (10) and flowmeter (11), flowmeter wherein (11) is communicated with the purging mouth (3) of sampling head (12) by pipeline; Said flowmeter (11) also is connected with flow control valve (10), pressure maintaining valve (8) and source of the gas (6) successively by pipeline; Also be connected to tensimeter (9) on the pipeline between pressure maintaining valve (8) and flow control valve (10).
2. the anti-blocking blow device of wind pressure measurement according to claim 1 is characterized in that between source of the gas (6) and pressure maintaining valve (8) moisture trap (7) being arranged.
3. the anti-blocking blow device of wind pressure measurement according to claim 1 is characterized in that said flowmeter (11) is a spinner-type flowmeter.
4. according to claim 1, the anti-blocking blow device of 2 or 3 described wind pressure measurements, it is characterized in that between pressure unit (5) and sampling head (12) pressure compensator (4) being arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074544 CN2859487Y (en) | 2005-08-10 | 2005-08-10 | Block-prevention purging device for wind pressure measuring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074544 CN2859487Y (en) | 2005-08-10 | 2005-08-10 | Block-prevention purging device for wind pressure measuring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859487Y true CN2859487Y (en) | 2007-01-17 |
Family
ID=37612346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520074544 Expired - Fee Related CN2859487Y (en) | 2005-08-10 | 2005-08-10 | Block-prevention purging device for wind pressure measuring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859487Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713677A (en) * | 2013-12-17 | 2015-06-17 | 贵阳铝镁设计研究院有限公司 | Blocking-preventing method and device for boiler combustion chamber negative pressure measuring pipeline |
-
2005
- 2005-08-10 CN CN 200520074544 patent/CN2859487Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713677A (en) * | 2013-12-17 | 2015-06-17 | 贵阳铝镁设计研究院有限公司 | Blocking-preventing method and device for boiler combustion chamber negative pressure measuring pipeline |
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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: 20070117 Termination date: 20090910 |