CN201476823U - Anti-clogging and abrasion resistant multi-point multiple measuring device for Venturi flow rate - Google Patents
Anti-clogging and abrasion resistant multi-point multiple measuring device for Venturi flow rate Download PDFInfo
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- CN201476823U CN201476823U CN2009201439650U CN200920143965U CN201476823U CN 201476823 U CN201476823 U CN 201476823U CN 2009201439650 U CN2009201439650 U CN 2009201439650U CN 200920143965 U CN200920143965 U CN 200920143965U CN 201476823 U CN201476823 U CN 201476823U
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- pressure pipe
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Abstract
The utility model relates to an anti-clogging and abrasion resistant multi-point multiple measuring device for the Venturi flow rate, which comprises a supporting rod and is characterized in that a group of large caliber anti-clogging full pressure positive pressure-sampling pipes and a groups of Venturi negative pressure-sampling pipes are arranged on the supporting rod. The device provided by the utility model is provided with a group of measuring points, and the modification is based on the single-point measurement manner of the original single-Venturi pressure-sampling device. By adopting a plurality of full pressure pipes and the multi-point measurement manner with multiple throat tubes, the original single-point measurement is changed into multi-point surface measurement at present, thereby greatly improving the differential pressure value of the Venturi, improving the measuring accuracy, and at the same time enhancing the anti-clogging and abrasion resistant performance of the device.
Description
Technical field
The utility model relates to flow measurement device, particularly relates to the multiple venturi flow measurement mechanism of a kind of anti-blocking wear-resisting type multiple spot.
Background technology
The venturi measurement mechanism is a plug in construction, and when fluid flow through the larynx neck tube, throat flowed to spread angle by contraction mouth, diffusion swabbing action through twice spread angle, the rate of flow of fluid of throat has produced the rectification amplification, has greatly improved throat's flow rate of fluid, and the static pressure of throat is obviously descended.Differential pressure between the measured negative pressure pressure of the measured total head pressure of Venturi tube pitot hole and many larynxs neck throat obtains amplifying like this, and flow is big more, and the differential pressure value that is produced is just big more, by measuring the method for differential pressure, just can record the flow of pipeline.Venturi tube flow measurement device in the market mostly is single-point list Venturi tube and single-point double-venturi tube flow measurement device, also has the many larynxs neck flow measurement device that on market, occurs in the recent period, these venturi flow measurement mechanisms all exist many weak points, mainly show as following some:
(1) because of adopting single Venturi tube, the differential pressure of generation is low, is unfavorable for measuring;
(2) because of measurement point is a single-point, the pressure scope is little, causes measuring accuracy low;
(3) in operational process, the instrument anti-blocking performance is poor, easier obstruction when the vertical pipe level is installed especially, and after the obstruction, differential pressure signal disappears, and causes instrument to work;
(4) for preventing the instrument obstruction, often need to connect blow device, both influenced the instrument continuous coverage, increase cost and energy consumption again.
Summary of the invention
The purpose of this utility model is to overcome the defective of above-mentioned prior art, provide a kind of effective raising pressure difference, and anti-blocking performance is good, exempts to purge the non-maintaining multiple venturi flow measurement mechanism of anti-blocking wear-resisting type multiple spot.
The technical solution of the utility model is:
The multiple venturi flow measurement mechanism of a kind of anti-blocking wear-resisting type multiple spot comprises support bar, it is characterized in that: above-mentioned support bar is provided with one group of heavy caliber block-resistant type total head officially enroll pressure pipe and the negative pressure pipe of one group of venturi;
The described heavy caliber block-resistant type total head pressure pipe of officiallying enroll is the straight tubular ram-air pipe on inclined-plane by two ends and is fixed on its sidewall and the pressure pipe of officiallying enroll that communicates with it is formed;
Described pressure pipe and the ram-air pipe center line of officiallying enroll is the 45 setting;
The negative pressure pipe of described venturi is made up of many larynxs neck tube and the negative pressure pipe that is fixed on its sidewall and communicate with it;
Described negative pressure pipe and many larynxs neck tube center line are the 45 setting.
The utility model is on the spot measurement mode basis of original single venturi pressure obtaning device, measurement point is become one group, adopt the multimetering mode of a plurality of ram-air pipes and the pressure of many larynxs neck tube, become present multiple spot planar survey mode by original spot measurement, improved the differential pressure value of venturi greatly, improve measuring accuracy, increased the anti-blocking anti-wear performance of instrument simultaneously.
Its major advantage is embodied in:
(1) in the dynamic pressure measurement process, when total head is constant, utilize the swabbing action of venturi, make negative pressure drop to very low limit, greatly promote the differential pressure scope, under identical working condition, its differential pressure value can reach more than 3 times of crust class flow measurement device, therefore can measure the low speed flow that other differential pressure type flow instrument can't be measured.At heavy caliber, low static pressure, in the flow measurement under the low pressure loss condition, its advantage is especially outstanding.
(2) a plurality of ram-air pipes of multiple spot venturi are got malleation, venturi is got the pressure form of negative pressure, effectively balance the hydrodynamic pressure degree of uniformity in the pipeline, there is the cold conditions simulated experiment to show, at straight length is preceding 1D, the back is under the situation of 0.5D, also can obtain comparatively satisfied measurement result, and is very big to the meaning of measuring the very short secondary air of straight length.
(3) bigger improvement is arranged in the design of pressure point, measure by original single venturi single-point pressure line, be extended for many ram-air pipes, the planar survey of many venturi pressure (pressing log-linear measurement distributes), through experiment test, and show according to up-to-date data, although under quite short straight length, also can reach higher precision (± 1% or higher precision).
(4) modified sensor construction form has taken into full account a large amount of on-the-spot user modes, by ram-air pipe with the pressure aperture increase, on cross-section of pipeline, the pressure direction is become perpendicular to 45 ° of these changes of center line, greatly strengthened the anti-blocking performance of product, realized exempting from purging, non-maintaining.
(5) developed the insert type flow measuring device that suitable vertical pipe level is installed especially.When level is installed this device or is measured dirty fluid, stop up pressure port or connecting pipe easily, and the present invention has good anti-blocking property by the angle of design change measuring sensor, can normally measure for a long time, avoid substantially safeguarding.
Table 1 is that the main performance of the utility model and other correlative flow measurement mechanism compares
Table 2 is that the usability and the computational data of the utility model and other Related product compares
The usability of subordinate list two relevant products and computational data are relatively
The actual condition parameter of certain power plant:
| Station | Title | Medium | Pressure MPa | Temperature | Pipeline specifications | Mounting means | Maximum flow | Normal discharge | Minimum flow |
| 080911 | A hot-flow flue coal pulverizer inlet flow rate | Hot blast | 0.019 | 350℃ | 900× 800 | The vertical pipe level is installed | 22m 3/ s | 15.14 m 3/s | 12 m 3/s |
| 080912 | The secondary hot-air road | Hot blast | -4.06 ～ +3.36 | 329℃ | 2400× 2500 | Horizontal pipe is vertically installed | 115m 3/s | 103m 3 /s | 50m 3/ s |
The contrast of critical datas such as the differential pressure under the above-mentioned actual condition environment, anti-blocking and crushing:
Description of drawings
Fig. 1 is the structural representation sketch of the multiple venturi flow measurement mechanism of the anti-blocking wear-resisting type multiple spot of the utility model;
Fig. 2 is the sectional view of many larynxs neck tube in the utility model;
Fig. 3 is the officially enroll enlarged drawing of the negative pressure pipe of pressure pipe and venturi of total head.
Embodiment
The multiple venturi flow measurement mechanism of the anti-blocking wear-resisting type multiple spot of the utility model, main improvement is on the basis of original single venturi pressure obtaning device, adopts, its concrete structure mode is:
With support bar 1 is support, and one group of heavy caliber block-resistant type total head officially enroll pressure pipe and one group of negative pressure pipe of venturi are set around it,
Wherein the heavy caliber block-resistant type total head two ends of pressure pipe of officiallying enroll are the straight tubular ram-air pipe 2 on inclined-plane and are fixed on its sidewall and the pressure pipe 3 of officiallying enroll that communicates with it is formed that the pressure pipe of officiallying enroll 3 is the 45 setting with ram-air pipe 2 center lines.
The negative pressure pipe of described venturi is made up of many larynxs neck tube 4 and the negative pressure pipe 5 that is fixed on its sidewall and communicate with it, and negative pressure pipe 5 is the 45 setting with many larynxs neck tube 4 center lines,
In the actual fabrication process, can make support bar 1 hollow and install a hollow tubular 6 therein additional, link to each other with transmitter after all pressure pipes 3 of officiallying enroll finally are pooled to support bar 1 inner chamber like this, hollow tubular 6 backs that all negative pressure pipes 3 finally are pooled in the support bar 1 link to each other with transmitter.
Claims (5)
1. the multiple venturi flow measurement mechanism of anti-blocking wear-resisting type multiple spot comprises support bar (1), it is characterized in that: above-mentioned support bar (1) is provided with one group of heavy caliber block-resistant type total head officially enroll pressure pipe and the negative pressure pipe of one group of venturi.
2. according to the multiple venturi flow measurement mechanism of the described anti-blocking wear-resisting type multiple spot of claim 1, it is characterized in that: the described heavy caliber block-resistant type total head pressure pipe of officiallying enroll is the straight tubular ram-air pipe (2) on inclined-plane by two ends and is fixed on its sidewall and the pressure pipe of officiallying enroll (3) that communicates with it is formed.
3. according to the multiple venturi flow measurement mechanism of the described anti-blocking wear-resisting type multiple spot of claim 1, it is characterized in that: the described pressure pipe of officiallying enroll (3) is the 45 setting with ram-air pipe (2) center line.
4. according to the multiple venturi flow measurement mechanism of the described anti-blocking wear-resisting type multiple spot of claim 1, it is characterized in that: the negative pressure pipe of described venturi is by many larynxs neck tube (4) and be fixed on its sidewall and the negative pressure pipe (5) that communicates with it is formed.
5. according to the multiple venturi flow measurement mechanism of the described anti-blocking wear-resisting type multiple spot of claim 1, it is characterized in that: described negative pressure pipe (5) is the 45 setting with many larynxs neck tube (4) center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201439650U CN201476823U (en) | 2009-07-29 | 2009-07-29 | Anti-clogging and abrasion resistant multi-point multiple measuring device for Venturi flow rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201439650U CN201476823U (en) | 2009-07-29 | 2009-07-29 | Anti-clogging and abrasion resistant multi-point multiple measuring device for Venturi flow rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201476823U true CN201476823U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201439650U Expired - Lifetime CN201476823U (en) | 2009-07-29 | 2009-07-29 | Anti-clogging and abrasion resistant multi-point multiple measuring device for Venturi flow rate |
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| Country | Link |
|---|---|
| CN (1) | CN201476823U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| CN104101387A (en) * | 2013-04-02 | 2014-10-15 | 国家电网公司 | Adjustable adaptive flute-shaped-tube wind volume measuring instrument |
| CN105698879A (en) * | 2016-04-08 | 2016-06-22 | 大唐彬长发电有限责任公司 | Multi-measuring point flow measurement device |
-
2009
- 2009-07-29 CN CN2009201439650U patent/CN201476823U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| CN104101387A (en) * | 2013-04-02 | 2014-10-15 | 国家电网公司 | Adjustable adaptive flute-shaped-tube wind volume measuring instrument |
| CN104101387B (en) * | 2013-04-02 | 2017-09-26 | 国家电网公司 | The adaptive flute type manage-style flowmeter of adjustable type |
| CN105698879A (en) * | 2016-04-08 | 2016-06-22 | 大唐彬长发电有限责任公司 | Multi-measuring point flow measurement device |
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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: 20100519 |