CN206300700U - A kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device - Google Patents
A kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device Download PDFInfo
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- CN206300700U CN206300700U CN201621199363.3U CN201621199363U CN206300700U CN 206300700 U CN206300700 U CN 206300700U CN 201621199363 U CN201621199363 U CN 201621199363U CN 206300700 U CN206300700 U CN 206300700U
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- pressure
- blocking
- pilot block
- total head
- static pressure
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Abstract
The utility model is related to a kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device.Anti-blocking pressure guiding device includes the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure, it is curly that the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure form half by thin-walled, along longitudinal both ends open of curling, the anti-blocking pilot block of total head is surrounded and is installed on the total head detection hole of the leading pressure pipe of the detection pipe total head of differential pressure multipoint stream gauge so that the total head that detected fluid is produced enters the total head and detects hole by the both ends open conduction of the anti-blocking pilot block of the total head；The anti-blocking pilot block of static pressure is surrounded and is installed on the static pressure detection hole of the leading pressure pipe of the detection pipe static pressure of the differential pressure multipoint stream gauge so that the static pressure that detected fluid is produced enters the static pressure and detects hole by the both ends open conduction of the anti-blocking pilot block of the static pressure.The utility model simple structure, can prevent dust from dominating pressure pipe full of detection pipe, ensure that differential pressure collection is unaffected.
Description
Technical field
The utility model relates generally to differential pressure matrix field of flow meters, and in particular to a kind of differential pressure matrix flowmeter, differential pressure
Multipoint stream gauge and anti-blocking pressure guiding device.
Background technology
Differential pressure type (also referred to as throttle type) flowmeter is the Throttle Principle based on flow of fluid, using fluid stream through throttling arrangement
When the pressure differential that produces and realize flow measurement, it be measure that flow is most ripe in production at present, one of most common method,
Typically by can by the flow of detected fluid be converted into pressure difference signal throttling arrangement (such as orifice plate, nozzle, Venturi tube) and
This pressure difference can be converted into the differential pressure flowmeter that corresponding flow value shows to be constituted.The fluid flow flowed in pipeline is got over
Greatly, the pressure difference for being produced before and after throttling arrangement is also bigger, as long as measuring the size of pressure difference before and after orifice plate, you can reflection outflow
Size, here it is throttling arrangement measures the general principle of flow.
Specifically, differential pressure flowmeter is mainly by detection pipe, differential pressure transmitter and jointing tracheae each other etc.
Part is constituted.During detection pipe inserted into pipeline during measurement, and total head and back pressure center probe axis is set to be in flow section center
And it is consistent with grain direction, total head probe gaging hole front tackles to flow, and detects fluid stagnation pressure, and pass it to differential pressure transporting
Device；Back pressure probe gaging hole pickup simultaneously is throttling pressurized and also passes it to differential pressure transmitter.Differential pressure transmitter reads complete, static pressure
Difference, according to Bernoulli equation V=K (2 Δ P/ ρ)0.5, the difference of total head and static pressure is measured, dynamic pressure is just measured, indirectly
Flue gas flow rate flow is measured.
Traditional differential pressure multipoint stream gauge, total head detection hole and static pressure detection hole are leaked in the dust of flue cruelly completely, because
The characteristics of for self structure, entrance total head detection hole and static pressure detection hole that dust can be different degrees of.After long term accumulation, dust meeting
Pressure pipe is dominated full of detection bar, gently then pressure conduction is insensitive, heavy then completely plugged detection hole, it is impossible to detect pressure change.
Most of differential pressure matrix flowmeters of the prior art, differential pressure multipoint stream gauge be not due to increasing anti-blocking pilot dress
Put, due to dust jam detection hole pressure conduction can be caused to be interfered after long-term use in flue.It is particularly applied to fire
When in the flue environment before and after the denitration of power power plant, dust content reaches 30-50g/m3, matrix flowmeter in flue easily by
Dust is blocked, and finally influences flow-speed measurement.
Therefore, differential pressure matrix, multipoint stream gauge need to solve total head detection hole and static pressure detects that hole is easily blocked by dust
Problem.
Utility model content
The purpose of this utility model is to provide a kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pilot dress
Put, to solve differential pressure matrix flowmeter of the prior art, differential pressure multipoint stream gauge due to after long-term use in flue, because of powder
Dirt jam detection hole causes the problem that pressure conduction is interfered.
The utility model aims to provide a kind of anti-blocking pressure guiding device of differential pressure multipoint stream gauge, the anti-blocking pressure guiding device bag
The anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure are included, the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure are by thin-walled shape
It is curly into half, along longitudinal both ends open of curling, wherein, it is many that the anti-blocking pilot block encirclement of total head is installed on the differential pressure
On the total head detection hole of the leading pressure pipe of detection pipe total head of point flowmeter so that the total head that detected fluid is produced is by the total head
The both ends open conduction of anti-blocking pilot block enters the total head and detects hole；The anti-blocking pilot block of static pressure is surrounded and is installed on the difference
Press on the static pressure detection hole of the leading pressure pipe of detection pipe static pressure of multipoint stream gauge so that the static pressure that detected fluid is produced is by described
The both ends open conduction of the anti-blocking pilot block of static pressure enters the static pressure and detects hole.
Above-mentioned device, longitudinal both ends open of the anti-blocking pilot block of total head is slant cutting edge so that the total head
The vertical line in the curling face of anti-blocking pilot block is gradually reduced in the direction away from total head detection hole.
Above-mentioned device, longitudinal both ends open of the anti-blocking pilot block of static pressure is slant cutting edge or flat mouth, when for oblique
Cause that the vertical line in the curling face of the anti-blocking pilot block of the static pressure gradually contracts in the direction away from the static pressure detection hole during otch
It is small.
The volume curved cross section of above-mentioned device, the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure for semicircle or
Square or wedge angle.
Above-mentioned device, away from the farthest vertical line in total head detection hole on the curling face of the anti-blocking pilot block of total head
Length detects the diameter in hole more than the total head；It is farthest away from static pressure detection hole on the curling face of the anti-blocking pilot block of static pressure
Vertical line length more than the static pressure detect hole diameter.
Above-mentioned device, away from the farthest vertical line in total head detection hole on the curling face of the anti-blocking pilot block of total head
Length is 2-40 times of the total head detection bore dia.
Above-mentioned device, it is characterised in that on the curling face of the anti-blocking pilot block of static pressure away from static pressure detection hole most
The length of remote vertical line is 2-40 times of the static pressure detection bore dia.
Above-mentioned device, the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure are installed with the differential pressure multipoint stream gauge
When cause that the anti-blocking pilot block of the total head and the opening of the anti-blocking pilot block of static pressure are easy to drop out dust.
The utility model also provides a kind of differential pressure multipoint stream gauge, and the differential pressure multipoint stream gauge is provided with above-mentioned anti-blocking pilot
Device, the anti-blocking pressure guiding device is welded to connect or bolt connection or riveting with the differential pressure multipoint stream gauge.
The utility model also provides a kind of differential pressure matrix flowmeter being made up of above-mentioned differential pressure multipoint stream gauge, Duo Zusuo
State differential pressure multipoint stream gauge and be installed in a co-planar fashion on tested pipeline and form the differential pressure matrix flowmeter.
The beneficial effects of the utility model are that the technical solution of the utility model simple structure has using gravity principle
Differential pressure multipoint stream gauge and differential pressure matrix flowmeter detection hole plug are solved the problems, such as to effect, just can be real using conventional material
It is existing, and low production cost.
Brief description of the drawings
Fig. 1 is the front view schematic diagram of the vertically-mounted differential pressure multipoint stream gauge structure of the utility model；
Fig. 2 is the schematic diagram of B-B cutaway view Amplified images in Fig. 1；
The front view schematic diagram of the differential pressure multipoint stream gauge structure that Fig. 3 is horizontally mounted for the utility model；
Fig. 4 is the schematic diagram of C-C cutaway view Amplified images in Fig. 3；
Fig. 5 is the differential pressure multipoint stream gauge operating diagram that the utility model embodiment is horizontally mounted.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the present utility model is described in more details, with
Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below
Mode and embodiment are only descriptive purposes, rather than to limitation of the present utility model.
The susceptible to plugging situation of pore volume is detected for differential pressure flowmeter, the utility model devises anti-blocking pressure guiding device, that is, exists
Total head detects that hole and static pressure detection hole front end increase anti-blocking pilot block, and the anti-blocking pilot block of total head is in windward side, anti-blocking pilot block
Two ends can have slant cutting edge, ensure that total head collection is unaffected.Anti-blocking pilot block can be with the installation direction of leading pressure pipe
And change direction, dust is normally dropped.The anti-blocking pilot block of static pressure can open flat mouth and also open angle, can form static pressure and adopt
Collection.
Usually, the anti-blocking pressure guiding device of differential pressure multipoint stream gauge is divided into two kinds, a kind of for vertically-mounted differential pressure is more
The anti-blocking pressure guiding device of flowmeter is put as shown in Figure 1, Figure 2, mainly by 4 groups of the anti-blocking pilot block 3 of detection total head and the anti-blocking pilot block of static pressure
Into.Another kind is anti-blocking pressure guiding device such as Fig. 3, the Fig. 4 for the differential pressure multipoint stream gauge being horizontally mounted, and its composition is also with vertically-mounted
Each part is identical, and simply installation direction is different.
As shown in Figure 2, Figure 4 shows, the anti-blocking pilot block 3 of total head and the anti-blocking pilot block 4 of static pressure are curly by thin-walled formation half,
Along longitudinal both ends open of curling, wherein, the anti-blocking pilot block 3 of total head surrounds the detection pipe total head for being installed on differential pressure multipoint stream gauge
On the total head detection hole 11 of leading pressure pipe 1 so that detected fluid enters institute by the both ends open of the anti-blocking pilot block 3 of the total head
State total head detection hole 11；The leading pressure pipe 2 of detection pipe static pressure that the anti-blocking encirclement of pilot block 4 of static pressure is installed on differential pressure multipoint stream gauge
On static pressure detection hole 21 so that detected fluid is detected by the both ends open of the anti-blocking pilot block 4 of the static pressure into the static pressure
Hole 21.
Enter anti-blocking pressure guiding device for the ease of detected fluid, and then enter detection hole, the longitudinal direction of the anti-blocking pilot block 3 of total head
Both ends open is slant cutting edge so that the vertical line in the curling face of the anti-blocking pilot block 3 of total head is away from total head inspection
The direction of gaging hole 11 is gradually reduced.
Because static pressure detection direction is leeward reverse, i.e., it is not head-on to set with detected fluid, thus the anti-blocking pilot of static pressure
Longitudinal both ends open of block 4 is that can be alternatively flat mouth for slant cutting edge.Similarly, cause that the static pressure is anti-blocking when for slant cutting edge
The vertical line in the curling face of pilot block 4 is gradually reduced in the direction away from static pressure detection hole 21.
The curling face shape of cross section of the anti-blocking pilot block 3 of total head and the anti-blocking pilot block 4 of static pressure is not limited.The anti-blocking pilot block of total head
3 and the anti-blocking pilot block 4 of static pressure volume curved cross section be semicircle or square or wedge angle.Certainly or other a plurality of broken lines
Shape.
As shown in figure 3, in order to do not allow tested flue dust be directly entered detection hole, on the curling face of the anti-blocking pilot block 3 of total head away from
The length of the farthest vertical line A in the total head detection hole 11 detects the diameter in hole 11 more than the total head.Similarly, static pressure is anti-blocking
Length on the curling face of pilot block 4 away from the farthest vertical line B in static pressure detection hole 21 detects hole 21 also greater than the static pressure
Diameter.
Preferably, away from the length of the farthest vertical line A in total head detection hole 11 on the curling face of the anti-blocking pilot block 3 of total head
It is 2-40 times of the total head detection diameter of hole 11.
Preferably, away from the length of the farthest vertical line B in static pressure detection hole 21 on the curling face of the anti-blocking pilot block 4 of static pressure
It is 2-40 times of the static pressure detection diameter of hole 21.
The anti-blocking pilot block of total head and static pressure anti-blocking pilot block cause described when being installed with the differential pressure multipoint stream gauge
It is easy to drop out dust in the opening of the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure.
Such as, when differential pressure multi-point flux is calculated as vertically-mounted, the anti-blocking pilot block 3 of total head and the anti-blocking pilot block 4 of static pressure
Pressure pipe 1 is dominated in longitudinal direction with the detection pipe total head of the differential pressure multipoint stream gauge and the axial direction of the leading pressure pipe 2 of detection pipe static pressure is put down
OK；When the differential pressure multi-point flux is calculated as being horizontally mounted, the anti-blocking pilot block 3 of total head and the anti-blocking pilot block 4 of static pressure it is vertical
The leading pressure pipe 1 of the detection pipe total head of differential pressure multipoint stream gauge described in Xiang Junyu and detection pipe static pressure dominate the axially vertical of pressure pipe 2.
So cause that the anti-blocking pilot block 3 of total head and the dust of the anti-blocking the inside of pilot block 4 of static pressure are dropped out naturally by gravity from opening.
When differential pressure multi-point flux meter is diagonally-installed on tested pipeline, make the anti-blocking pilot block of total head and static pressure anti-blocking as far as possible
The longitudinal direction along respective opening direction of pilot block is as far as possible small with the orientation angle of gravity, so facilitates dust by gravity from opening
Dropped out naturally at mouthful.
In a word, it is impossible to so that the longitudinal direction along respective both ends open direction of the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure
Horizontal positioned.
The utility model also provides a kind of differential pressure multipoint stream gauge, and the differential pressure multipoint stream gauge is provided with above-mentioned anti-blocking pilot
Device, the anti-blocking pressure guiding device is welded to connect or bolt connection or riveting with the differential pressure multipoint stream gauge.
The group number of anti-blocking pressure guiding device is not limited on differential pressure multipoint stream gauge, and installation can be spaced as needed.
The utility model also provides a kind of differential pressure matrix flowmeter being made up of above-mentioned differential pressure multipoint stream gauge, Duo Zusuo
State differential pressure multipoint stream gauge and be installed in a co-planar fashion on tested pipeline and form the differential pressure matrix flowmeter.
View of the foregoing, it will be seen that the technical solution of the utility model simple structure, differential pressure is efficiently solved using gravity principle
Multipoint stream gauge and differential pressure matrix flowmeter detect the problem of hole plug, be can be achieved with using conventional material, and production cost
It is low.
Embodiment
Anti-block apparatus of the present utility model are mainly used in the bar type multipoint differential pressure flowmeter in coal steam-electric plant smoke flow monitoring,
Because this bar type multipoint flowmeter detects hole when in use, a large amount of dust easily by carrying in flue gas is blocked, if blocking tight
Weight, can not exactly detect pressure differential when flowmeter cannot experience flue pressure, cause pressure difference inaccurate even without pressure difference, and
Extremely difficult cleaning after bar type multipoint differential pressure flowmeter detection hole is blocked, and because being porous, it is extremely difficult to cleared up by Purge methods
Internal dust stratification.
The operation principle of one group of anti-blocking pressure guiding device of the utility model embodiment is as shown in Figure 5.The flue of thermal power plant
In contain a large amount of dust, when this differential pressure type matrix flowmeter measures flow in flue, what is often carried in flow field is a large amount of
Dust jam detection hole, after adding anti-blocking pilot block of the present utility model, dust forward direction is rushed at after the anti-blocking pilot block 3 of total head because of weight
Power factor is dropped in flue, will not be entered detection pipe from detection hole and be dominated pressure pipe 1；When flow field passes through the anti-blocking pilot block 4 of static pressure
Afterwards, the dust in vortex is blocked in detection hole outside, but pressure conduction is unaffected.
Anti-blocking pressure guiding device of the present utility model utilizes dust self gravitation factor, dust is dropped naturally, will not
Into pressure guide hole, moreover it is possible to correctly gather pressure difference, can accomplish non-maintaining.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And not to the restriction of implementation method.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need and unable to be exhaustive to all of implementation method.And thus
Among the obvious change or variation amplified out are still in protection domain of the present utility model.
Claims (10)
1. a kind of anti-blocking pressure guiding device of differential pressure multipoint stream gauge, it is characterised in that the anti-blocking pressure guiding device is anti-including total head
Stifled pilot block and the anti-blocking pilot block of static pressure, the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure form half and crimp by thin-walled
Shape, along longitudinal both ends open of curling, wherein,
The anti-blocking pilot block of total head surrounds the total head of the leading pressure pipe of detection pipe total head for being installed on the differential pressure multipoint stream gauge
On detection hole so that the total head that detected fluid is produced is conducted by the both ends open of the anti-blocking pilot block of the total head and enters described complete
Pressure detection hole；
The anti-blocking pilot block of static pressure surrounds the static pressure of the leading pressure pipe of detection pipe static pressure for being installed on the differential pressure multipoint stream gauge
On detection hole so that the static pressure that detected fluid is produced is conducted by the both ends open of the anti-blocking pilot block of the static pressure and enters described quiet
Pressure detection hole.
2. device as claimed in claim 1, it is characterised in that longitudinal both ends open of the anti-blocking pilot block of total head is tiltedly
To otch so that the vertical line in the curling face of the anti-blocking pilot block of total head gradually contracts in the direction away from total head detection hole
It is small.
3. device as claimed in claim 1, it is characterised in that longitudinal both ends open of the anti-blocking pilot block of static pressure is oblique
Otch or flat mouth, cause the vertical line in curling face of the anti-blocking pilot block of the static pressure away from the static pressure when for slant cutting edge
Detect that the direction in hole is gradually reduced.
4. device as claimed in claim 1, it is characterised in that the volume of the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure
Curved cross section is semicircle or square or wedge angle.
5. device as claimed in claim 1, it is characterised in that away from the total head on the curling face of the anti-blocking pilot block of total head
The length of the farthest vertical line in detection hole detects the diameter in hole more than the total head；On the curling face of the anti-blocking pilot block of static pressure
Length away from the farthest vertical line in static pressure detection hole detects the diameter in hole more than the static pressure.
6. device as claimed in claim 5, it is characterised in that away from the total head on the curling face of the anti-blocking pilot block of total head
The length of the farthest vertical line in detection hole is 2-40 times of the total head detection bore dia.
7. device as claimed in claim 5, it is characterised in that away from the static pressure on the curling face of the anti-blocking pilot block of static pressure
The length of the farthest vertical line in detection hole is 2-40 times of the static pressure detection bore dia.
8. device as claimed in claim 1, it is characterised in that the anti-blocking pilot block of total head and the anti-blocking pilot block of static pressure and institute
State when differential pressure multipoint stream gauge is installed so that the opening of the anti-blocking pilot block of the total head and the anti-blocking pilot block of static pressure is easy to drop out powder
Dirt.
9. a kind of differential pressure multipoint stream gauge for being provided with anti-blocking pressure guiding device described in any one of claim 1 to 8, its feature exists
In the anti-blocking pressure guiding device is welded to connect or bolt connection or riveting with the differential pressure multipoint stream gauge.
10. a kind of differential pressure matrix flowmeter that differential pressure multipoint stream gauge by described in claim 9 is constituted, multigroup differential pressure is more
Point flowmeter is installed on tested pipeline and forms the differential pressure matrix flowmeter in a co-planar fashion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199363.3U CN206300700U (en) | 2016-11-07 | 2016-11-07 | A kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199363.3U CN206300700U (en) | 2016-11-07 | 2016-11-07 | A kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device |
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| Publication Number | Publication Date |
|---|---|
| CN206300700U true CN206300700U (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621199363.3U Active CN206300700U (en) | 2016-11-07 | 2016-11-07 | A kind of differential pressure matrix flowmeter, differential pressure multipoint stream gauge and anti-blocking pressure guiding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525187A (en) * | 2016-11-07 | 2017-03-22 | 北京雪迪龙科技股份有限公司 | Differential-pressure matrix flow meter, differential-pressure multipoint flow meter and anti-blocking pressure guide device |
-
2016
- 2016-11-07 CN CN201621199363.3U patent/CN206300700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525187A (en) * | 2016-11-07 | 2017-03-22 | 北京雪迪龙科技股份有限公司 | Differential-pressure matrix flow meter, differential-pressure multipoint flow meter and anti-blocking pressure guide device |
| CN106525187B (en) * | 2016-11-07 | 2023-06-30 | 北京雪迪龙科技股份有限公司 | Differential pressure matrix flowmeter, differential pressure multi-point flowmeter and anti-blocking pressure guiding device |
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