CN203069212U - Cross section rectifier type flowmeter - Google Patents
Cross section rectifier type flowmeter Download PDFInfo
- Publication number
- CN203069212U CN203069212U CN 201220729336 CN201220729336U CN203069212U CN 203069212 U CN203069212 U CN 203069212U CN 201220729336 CN201220729336 CN 201220729336 CN 201220729336 U CN201220729336 U CN 201220729336U CN 203069212 U CN203069212 U CN 203069212U
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- Prior art keywords
- pipe
- measuring channel
- pressure
- total head
- xsect
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Abstract
The utility model discloses a cross section rectifier type flowmeter. The cross section rectifier type flowmeter comprises a measuring channel, a current-straightening device is perpendicularly arranged in the measuring channel, the current-straightening device is located at the poison from which the flow entries into measuring channel, the sectional area of the current-straightening device is the same as the area of an inner bore of the measuring channel, at least one total pressure measuring pipe and one static pressure measuring pipe are arranged in the measuring channel in the radial direction of the measuring channel, a plurality of positive pressure taps are formed in the total pressure measuring pipe, a plurality of negative pressure taps are formed in the static pressure measuring pipe, the negative pressure taps face towards the outflow direction of fluid, a gathering pipe is arranged in the measuring channel, the gathering pipe is communicated with the total pressure measuring pipe, a total pressure joint and a static pressure joint are arranged on the measuring channel, the total pressure joint is communicated with the gathering pipe, and the static pressure joint is communicated with the static pressure measuring pipe. The cross section rectifier type flowmeter is stable in measurement, high in accuracy and uniform and stable in flow rate.
Description
Technical field
The utility model relates to the measuring appliance of fluid flow, particularly a kind of xsect rectifier type flowmeter.
Background technology
Raising along with power plant's automatic control level, the load pulverized-coal amount of coal-burning boiler and air distribution amount need realize monitoring and robotization coordination control, make the boiler primary and secondary air cooperate reason, wind speed is even in each airduct, just can guarantee that boiler combustion is stable, improve boiler efficiency and want ten meetings necessary for technical Analysis and the business accounting of production run, but up to now, because the straight length in heat power plant boiler secondary air channel road is extremely short, does not perhaps almost just have; And the pipeline of secondary wind is distributed with T shape pipeline, L shaped bend pipe, damper, reducer pipe etc. in extremely limited distance, and the flow stateization of secondary wind in the pipeline is not surveyed, and this just makes the measurement of secondary wind become very difficult thing with demarcating.The accuracy of measuring is low.
The utility model content
The purpose of this utility model is to overcome the defective that exists in the prior art, and a kind of xsect rectifier type flowmeter is provided, and measure and stablize, the precision height, flow velocity is uniform and stable.
For achieving the above object, the technical solution of the utility model has provided a kind of xsect rectifier type flowmeter, comprise measuring channel, be vertically installed with the direct current device in the described measuring channel, described direct current device is positioned at the fluid approach axis place of described measuring channel, the sectional area of described direct current device is identical with the endoporus area of described measuring channel, radially be provided with at least one total head pressure pipe and a static pressure pressure pipe along it in the described measuring channel, offer several positive pressure tappings on the described total head pressure pipe, described positive pressure tappings is facing to the fluid approach axis, offer several negative pressure tappings on the described static pressure pressure pipe, described negative pressure tappings flows out direction facing to fluid, be provided with in the described measuring channel and gather pipe, the described pipe that gathers is connected with described total head pressure pipe, described measuring channel is provided with total head joint and static pressure inlet, described total head joint is connected with the described pipe that gathers, and described static pressure inlet is connected with described static pressure pressure pipe.
As preferably, the xsect of described measuring channel is rounded, and described total head pressure pipe has two, describedly gathers axially paralleling of pipe and described measuring channel.
As preferably, describedly gather the center line of pipe and the center line of described measuring channel coincides.
As preferably, the xsect of described measuring channel is rectangular, described total head pressure pipe has four, the described pipe that gathers is along the radially setting of described measuring channel, described total head pressure pipe parallels with described static pressure pressure pipe, and the described pipe that gathers is perpendicular with described total head pressure pipe.
As preferably, the both ends of described measuring channel are set with joint flange.
Advantage of the present utility model is with beneficial effect: the xsect of rectangle or circular pipe is on average become the identical junior unit of several areas, measure the flow velocity of each junior unit central point, get flow velocity and the mean value of all junior units again, i.e. velocity-area method is when cellar area is cut apart more manyly, measured flow velocity is more accurate, based on above-mentioned principle, this flowmeter has to measure stablizes the precision height, and by the direct current device is set the air-flow of disturbance is become air-flow stably, flow velocity is uniform and stable.
Description of drawings
Fig. 1 is the utility model front view (embodiment one);
Fig. 2 is the utility model side view (embodiment one);
Fig. 3 is the utility model front view (embodiment two);
Fig. 4 is the utility model side view (embodiment two).
Among the figure: 1, measuring channel; 2, direct current device; 3, total head pressure pipe; 4, static pressure pressure pipe; 5, positive pressure tappings; 6, negative pressure tappings; 7, total head joint; 8, static pressure inlet; 9, gather pipe; 10, joint flange.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
Shown in Fig. 1-4, a kind of xsect rectifier type flowmeter, comprise measuring channel 1, be vertically installed with direct current device 2 in the described measuring channel 1, described direct current device 2 is positioned at the fluid approach axis place of described measuring channel 1, the sectional area of described direct current device 2 is identical with the endoporus area of described measuring channel 1, radially be provided with at least one total head pressure pipe 3 and a static pressure pressure pipe 4 along it in the described measuring channel 1, offer several positive pressure tappings 5 on the described total head pressure pipe 3, described positive pressure tappings 5 is facing to the fluid approach axis, offer several negative pressure tappings 6 on the described static pressure pressure pipe 4, described negative pressure tappings 6 flows out direction facing to fluid, be provided with in the described measuring channel 1 and gather pipe 9, the described pipe 9 that gathers is connected with described total head pressure pipe 3, described measuring channel 1 is provided with total head joint 7 and static pressure inlet 8, and described total head joint 7 is connected with the described pipe 9 that gathers, and described static pressure inlet 8 is connected with described static pressure pressure pipe 4.
Embodiment one: shown in Fig. 1-2, the xsect of described measuring channel 1 is rounded, and described total head pressure pipe 3 has two, describedly gathers pipe 9 and axially the paralleling of described measuring channel 1.Describedly gather pipe 9 center line and the center line of described measuring channel 1 coincides.
Embodiment one: as shown in Figure 3-4, the xsect of described measuring channel 1 is rectangular, described total head pressure pipe 3 has four, described gathering managed the 9 radially settings along described measuring channel 1, described total head pressure pipe 3 parallels with described static pressure pressure pipe 4, and the described pipe 9 that gathers is perpendicular with described total head pressure pipe 3.
Shown in Fig. 1-4, the both ends of described measuring channel 1 are set with joint flange 10.
Since there are not enough straight lengths, different by the flow velocity of each point on measuring channel 1 xsect, be difficult to a point that finds can represent mean flow rate.Actual wind speed distributes does not have certain rule to follow yet.Therefore with the size of rectangle or circular pipe, xsect on average becomes the identical junior unit of several areas, and the flow velocity of measuring each junior unit central point is got flow velocity and the mean value of all junior units, the i.e. mean flow rate of whole cross-sectional area again, i.e. velocity-area method again.Cut apart more manyly when cellar area, measured flow velocity is more accurate.Xsect rectifier type apparatus for measuring air quantity designs with regard to being based on this principle, and this device is no matter measuring channel 1 sectional area is much, and its length is all between 250～300mm.Inlet end at this device is the direct current device 2 that is covered with whole sectional area, and the air-flow of disturbance becomes air-flow stably through the rectification of direct current device 2.The installation site of 260～300mm need not any pipeline section that reaches, as long as just can guarantee its measurement.Need not on-site proving, all flow products of it and other have the perforate mode of identical pressure tap be subjected to irregular fluid to influence the pressure loss very little, the rectifier type air quantity is surveyed the air channel type that is set to, just the same its two ends of physical dimension and air channel that are it are circle or rectangular duct, can be connected with measuring channel 1 by form of flanges.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. xsect rectifier type flowmeter, it is characterized in that: comprise measuring channel, be vertically installed with the direct current device in the described measuring channel, described direct current device is positioned at the fluid approach axis place of described measuring channel, the sectional area of described direct current device is identical with the endoporus area of described measuring channel, radially be provided with at least one total head pressure pipe and a static pressure pressure pipe along it in the described measuring channel, offer several positive pressure tappings on the described total head pressure pipe, described positive pressure tappings is facing to the fluid approach axis, offer several negative pressure tappings on the described static pressure pressure pipe, described negative pressure tappings flows out direction facing to fluid, be provided with in the described measuring channel and gather pipe, the described pipe that gathers is connected with described total head pressure pipe, described measuring channel is provided with total head joint and static pressure inlet, described total head joint is connected with the described pipe that gathers, and described static pressure inlet is connected with described static pressure pressure pipe.
2. xsect rectifier type flowmeter as claimed in claim 1, it is characterized in that: the xsect of described measuring channel is rounded, and described total head pressure pipe has two, describedly gathers axially paralleling of pipe and described measuring channel.
3. xsect rectifier type flowmeter as claimed in claim 2 is characterized in that: describedly gather the center line of pipe and the center line of described measuring channel coincides.
4. xsect rectifier type flowmeter as claimed in claim 1, it is characterized in that: the xsect of described measuring channel is rectangular, described total head pressure pipe has four, the described pipe that gathers is along the radially setting of described measuring channel, described total head pressure pipe parallels with described static pressure pressure pipe, and the described pipe that gathers is perpendicular with described total head pressure pipe.
5. xsect rectifier type flowmeter as claimed in claim 1, it is characterized in that: the both ends of described measuring channel are set with joint flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729336 CN203069212U (en) | 2012-12-26 | 2012-12-26 | Cross section rectifier type flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729336 CN203069212U (en) | 2012-12-26 | 2012-12-26 | Cross section rectifier type flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069212U true CN203069212U (en) | 2013-07-17 |
Family
ID=48767989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220729336 Expired - Fee Related CN203069212U (en) | 2012-12-26 | 2012-12-26 | Cross section rectifier type flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203069212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246897A (en) * | 2017-08-04 | 2017-10-13 | 银川融神威自动化仪表厂(有限公司) | Multichannel self-rectifying low pressure loss subtracts consumption device |
-
2012
- 2012-12-26 CN CN 201220729336 patent/CN203069212U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246897A (en) * | 2017-08-04 | 2017-10-13 | 银川融神威自动化仪表厂(有限公司) | Multichannel self-rectifying low pressure loss subtracts consumption device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20201226 |