CN203657873U - Pipeline negative pressure eliminating device - Google Patents
Pipeline negative pressure eliminating device Download PDFInfo
- Publication number
- CN203657873U CN203657873U CN201320644844.0U CN201320644844U CN203657873U CN 203657873 U CN203657873 U CN 203657873U CN 201320644844 U CN201320644844 U CN 201320644844U CN 203657873 U CN203657873 U CN 203657873U
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- China
- Prior art keywords
- pipeline
- negative pressure
- eliminating device
- flowmeter
- measured
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- Expired - Fee Related
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Abstract
The utility model provides a pipeline negative pressure eliminating device. The pipeline negative pressure eliminating device adopts the structure that a buffering water tank is arranged on an external-connection pipeline of a liquid pipeline to be measured; negative pressure equilibrium valves are arranged at the upper part of the buffering water tank through exhaust pipes. According to the pipeline negative pressure eliminating device, the exhaust pipes and the negative pressure equilibrium valves are mounted at the highest positions of a to-be-measured pipeline or higher positions of a vertically downward pipeline; the technology that the velocity method is adopted to measure full-pipe liquid flow in a high-fall-head pipeline is adopted; after all of the negative pressure equilibrium valves are closed, liquid in the pipeline starts to circulate, and then all of the negative pressure equilibrium valves are opened to enable the pipeline above the buffering water tank to not have the condition for negative pressure generation. The fall head of the pipeline to be measured can be reduced, a flowmeter can meet a measuring condition, the measurement result of the flowmeter can be accurate, stable and reliable, and the service life of the flowmeter can be prolonged.
Description
Technical field
The utility model belongs to instrument measurement technical field, relates to a kind of pipe negative pressure cancellation element, and the negative pressure that is mainly used in fluid to be measured pipeline in tachometric method liquid full packages flow measurement technology is eliminated.
Background technology
At present in instrument measurement technology, what the employing of tachometric method liquid full packages flow measurement technology was more is differential pressure flowmeter and electromagnetic flowmeter, in tachometric method liquid full packages flow measurement technology, fluid to be measured pipeline has high drop causes fluid circuit band negative pressure, liquid measure is carried out in the complex environment of negative pressure, cause electromagnetic flowmeter, differential pressure transmitter to measure misalignment, disturbance, even cause electromagnetic flowmeter lining or differential pressure transmitter sensing unit to damage the fault that cannot repair.
Utility model content
The utility model, for problems of the prior art, provides a kind of pipe negative pressure cancellation element, and the negative pressure that is mainly used in fluid to be measured pipeline in tachometric method liquid full packages flow measurement technology is eliminated.
A kind of pipe negative pressure cancellation element of the present utility model is provided with buffer tank on the external pipe of fluid to be measured pipeline, and the top of described buffer tank is provided with negative pressure balance valve by exhaust duct.
Described negative pressure balance valve is multiple, can regulate better pressure equilibrium.
The relative prior art of the utility model has the following advantages:
1, the utility model measure the highest point of pipeline or straight down pipeline higher position air draft pipeline and negative pressure balance valve are installed, and utilize tachometric method to measure full packages fluid flow technology in high drop pipeline, liquid in negative pressure balance valve Close All relief pipeline is started after circulation, negative pressure balance valve all can be opened, make pipeline more than buffer tank not possess the condition that negative pressure produces that produces, can reduce the drop of measured pipeline, make flowmeter reach measuring condition, make flowmeter survey result accurate, reliable and stable, extend the serviceable life of flowmeter.
2, the utility model is simple in structure, and equipment cost is low, and job operation is simple, is easy to realize.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, pipe negative pressure cancellation element of the present utility model is described in further detail.
Pipe negative pressure cancellation element is as shown in Figure 1 provided with buffer tank 1 on the external pipe of fluid to be measured pipeline, and the top of described buffer tank 1 is provided with negative pressure balance valve 3 by exhaust duct 2; Negative pressure balance valve 3 is multiple.
Buffer tank 1 use of the present utility model and the steel plate of measuring media conveyance conduit equality strength manufacture the water tank of upper and lower perforate 5, the length of water tank is of a size of the more than 2 times of external pipe 4 diameters, opens respectively the pipeline connecting hole with external pipe 4 diameter same sizes in buffer tank 1 top and the bottom; Exhaust duct 2 need select latus rectum large (latus rectum minimum be greater than DN50mm more than) and with main line with intensity draining or gas outlet, the height of pipeline need to be higher than the highest point that enters buffer tank 1 pipeline; Ball valve or gate valve that negative pressure balance valve 3 need be selected latus rectum large (latus rectum minimum be greater than DN50mm more than) and easily open, can not select stop valve, needle valve etc. that latus rectum is less, and valve is arranged on the highest point of exhaust duct 2.
When use, first the liquid in negative pressure balance valve 3 Close All relief pipelines to be started, after circulation, negative pressure balance valve 3 all can be opened, more than 1 pipeline of buffer tank not possessed and produce the condition that negative pressure produces.
Claims (2)
1. pipe negative pressure cancellation element, is characterized in that: on the external pipe (4) of fluid to be measured pipeline, be provided with buffer tank (1), the top of described buffer tank (1) is provided with negative pressure balance valve (3) by exhaust duct (2).
2. pipe negative pressure cancellation element as claimed in claim 1, is characterized in that: described negative pressure balance valve (3) is for multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320644844.0U CN203657873U (en) | 2013-10-19 | 2013-10-19 | Pipeline negative pressure eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320644844.0U CN203657873U (en) | 2013-10-19 | 2013-10-19 | Pipeline negative pressure eliminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203657873U true CN203657873U (en) | 2014-06-18 |
Family
ID=50924250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320644844.0U Expired - Fee Related CN203657873U (en) | 2013-10-19 | 2013-10-19 | Pipeline negative pressure eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203657873U (en) |
-
2013
- 2013-10-19 CN CN201320644844.0U patent/CN203657873U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20141019 |
|
| EXPY | Termination of patent right or utility model |