CN206258479U - A kind of differential pressure type measuring device - Google Patents
A kind of differential pressure type measuring device Download PDFInfo
- Publication number
- CN206258479U CN206258479U CN201621387127.4U CN201621387127U CN206258479U CN 206258479 U CN206258479 U CN 206258479U CN 201621387127 U CN201621387127 U CN 201621387127U CN 206258479 U CN206258479 U CN 206258479U
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- measuring device
- type measuring
- pressure type
- pitot tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The purpose of the application is to provide a kind of differential pressure type measuring device, including：S type Pitot tubes, and the mobile device of S types Pitot tube motion is driven, the mobile device includes driving rack and gear, and/or roller, and the S types Pitot tube is fixedly connected with driving rack.The differential pressure type measuring device also includes, the motor and the PLC control system with motor connection of drive gear operating.The application is based on PLC control system and circulates measurement with mechanical pointwise, reaches the purpose of online multiple spot differential pressure flow-speed measurement.Compared with artificial Pitot tube differential pressure method flow-speed measurement, measurement error is reduced, improve operating efficiency, can more meet the requirement that flue gas flow rate monitors performance assessment criteria.
Description
Technical field
The application is related to environmental monitoring technology field, more particularly to a kind of differential pressure type measuring device.
Background technology
In recent years, country has promulgated strict environment protection emission regulation, flue gas flow rate as " energy-saving and emission-reduction " important monitoring
Foundation, the required precision more and more higher of flow measurement apparatus.In the measuring method of domestic flue gas flow rate, pitot tube method and thermal balance
Method is point measurement, and supercritical ultrasonics technology is measured for wire type, and three is wet basis flow velocity.It is Pitot tube differential pressure that China master is to be mounted
Method, general, in the case where straight length fully can not meet requirement, measurement is without representative for Pitot tube flow-speed measurement technology
Property.
Used as environmentally friendly supervision department, artificial Pitot tube differential pressure method is taken in the measurement of traditional flue gas flow rate.As shown in figure 1, surveying
Try the first measuring point it is fast at the end of instrument buzzer call 10 seconds, compare operating personnel and arrived according to the mark rapid translation on sampling gun
Next point position, the moment keeps sampling gun horizontal positioned, and according to the method, the differential pressure of 5 test sections of point-to-point measurement is put down
Average, obtains one group of differential pressure average value.According to multiple measurement results, draw velocity field coefficient to correct in-line meter.However,
The comparison monitoring of the stationary source flue gas CEMS installed for state key monitoring enterprise, at least 4 times every year, quarterly at least
1 time, the networking of stationary source flue gas CEMS is checked and accepted, and 168 hours afterwards, also 1 time.Manual alignment test so many times,
Online flow velocity instrument cannot accomplish that the requirement of measurement performance assessment criteria can be met every time.And due to requiring Pitot tube sampling gun water
Placing flat, so, when velocity ratio is done to sampling, although the operating method of normative testing personnel, cannot still avoid human factor
Cause flow-speed measurement error.And the manual alignment result of environmentally friendly supervision department, directly decide the conjunction of online flue gas monitoring system
Whether is lattice.
The online S types pitot tube flowmeter of existing standard is：Single S types Pitot tube as pressure obtaning device, by positive pressure side
Pressure pipe and suction side pressure pipe measure differential pressure value, then are converted to current value by differential pressure transmitter.As shown in Fig. 2 S type skins
Trustship is fixed on chimney/flue by flange 3, by the difference that the malleation pressure pipe 2 and negative pressure pressure pipe 1 of S type Pitot tubes are measured
Pressure value, by positive pressure side blowback magnetic valve 6 and suction side blowback magnetic valve 7, is connected to differential pressure transmitter 8, by differential pressure
Differential pressure signal is converted to current signal by transmitter 8, finally calculates flue gas flow by differential pressure value.Wherein 4 and 5 reversed blow pressure contractings
Air.Being limited in that for above-mentioned online S types pitot tube flowmeter can only measure the difference in flue/chimney inside certain point position
Pressure value, requirement can not be fully met in straight length, and in the case of Flow Field Distribution inequality, single-point differential pressure measurement value is without representative
Property, error is larger.And this online Pitot tube differential pressure method measurement single-point, it is multiple with artificial Pitot tube differential pressure method flow-speed measurement disconnected
The flow velocity average value in face is compared, it is impossible to reach performance assessment criteria requirement of the manpower comparing to monitoring.
To sum up, existing pitot tube method measurement flue gas flow rate is present：Efficiency hand-manipulated is low, error big, online spot measurement
Without representativeness, it is impossible to the shortcomings of meeting monitoring performance assessment criteria.
The content of the invention
One purpose of the application is to provide a kind of differential pressure type measuring device, solves existing pitot tube method measurement flue gas flow rate
Exist efficiency hand-manipulated is low, error big, online spot measurement is without representativeness, it is impossible to meet asking for monitoring performance assessment criteria
Topic.
According to the one side of the application, there is provided a kind of differential pressure type measuring device, the device includes：
S type Pitot tubes, and drive the mobile device of S types Pitot tubes motion, the mobile device include driving rack and
Gear, and/or roller, the S types Pitot tube are fixedly connected with driving rack.
Further, in above-mentioned differential pressure type measuring device, the gear setting symmetrical above and below, or roller is symmetrical above and below sets
Put, or gear and roller setting symmetrical above and below.
Further, in above-mentioned differential pressure type measuring device, also include：The motor of drive gear operating, and connect with motor
The PLC control system for connecing.
Further, in above-mentioned differential pressure type measuring device, the PLC control system onboard clock and counter control S types
The motion of Pitot tube..
Further, in above-mentioned differential pressure type measuring device, also include：The differential pressure transmitter being connected with S type Pitot tubes.
Further, in above-mentioned differential pressure type measuring device, the S types Pitot tube is connected by a flexible pipe with differential pressure transmitter
Connect.
Further, in above-mentioned differential pressure type measuring device, the flexible pipe is set in retractable spiral shape.
Further, in above-mentioned differential pressure type measuring device, also include：Roller, the fixing device of holding movable device, and
The support meanss of supporting adn fixing device.
Further, in above-mentioned differential pressure type measuring device, the fixing device is set in the groove profile of open at both ends.
Further, in above-mentioned differential pressure type measuring device, the S types Pitot tube and driving rack pass through the company of being welded and fixed
Connect.
Compared with prior art, the differential pressure type measuring device that the application is provided, including：S type Pitot tubes, and drive S types
The mobile device of Pitot tube motion, the mobile device includes driving rack and gear, and/or roller, the S types Pitot tube and
Driving rack is fixedly connected.The application reaches the purpose of multiple spot differential pressure flow-speed measurement using mechanical pointwise circulation measurement, reduces
Measurement error, can meet the requirement that flue gas flow rate monitors performance assessment criteria.
Brief description of the drawings
By the detailed description made to non-limiting example made with reference to the following drawings of reading, the application other
Feature, objects and advantages will become more apparent upon：
Fig. 1 shows to measure the structural representation of flue gas flow rate using artificial Pitot tube differential pressure method in the prior art；
Fig. 2 shows the structure scheme of installation of online S types pitot tube flowmeter in the prior art；
Fig. 3 shows the front view of the differential pressure type measuring device according to one aspect of the invention；
Fig. 4 shows the side view of the differential pressure type measuring device according to one aspect of the invention；
Fig. 5 shows the top view of the differential pressure type measuring device according to one aspect of the invention；
Fig. 6 shows that the PLC control system controlled motor of the differential pressure type measuring device according to one aspect of the invention drives S types
The operating diagram of Pitot tube movement；
Fig. 7 shows the PLC control system controlled motor rotating of the differential pressure type measuring device according to one aspect of the invention
Circuit diagram；
Reference：
1 support meanss, 2 support frames, 3 driving racks, 4 S type Pitot tubes, 5 open U-type grooves, 6 gears, 7 motors,
8 differential pressure transmitters, 9 PLC control systems, 10 rollers, 11 rollers, 12 flexible pipes；
Same or analogous reference represents same or analogous part in accompanying drawing.
Specific embodiment
In order that the purpose, technical scheme and advantage of the application are clearer, below in conjunction with accompanying drawing the application is made into
One step ground is described in detail, it is clear that described embodiment is only some embodiments of the present application, rather than whole implementation
Example.Based on the embodiment in the application, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of the application protection.
The application is described in further detail below in conjunction with the accompanying drawings.
According to the one side of the application, there is provided a kind of differential pressure type measuring device, the device includes：
S type Pitot tubes, and drive the mobile device of S types Pitot tubes motion, the mobile device include driving rack and
Gear, and/or roller, the S types Pitot tube are fixedly connected with driving rack.Specifically, the S types Pitot tube and driving rack
It is fixedly connected by welding.
The application reaches the purpose of multiple spot differential pressure flow-speed measurement using mechanical pointwise circulation measurement, reduces measurement error,
The requirement that flue gas flow rate monitors performance assessment criteria can be met.
Further, in above-mentioned differential pressure type measuring device, the gear setting symmetrical above and below, or roller is symmetrical above and below sets
Put, or gear and roller setting symmetrical above and below.Roller described in the embodiment of the present application can not only reach the Pitot tube motion of conveying S types
Purpose, and friction can be reduced.
Further, in above-mentioned differential pressure type measuring device, also include：The motor of drive gear operating, and connect with motor
The PLC control system for connecing.The PLC control system, during entering or exiting flue in S types Pitot tube, touches
Send out motor described and drive the movement of S types Pitot tube, carry out section by Point Measurement.
The application uses S type Pitot tube differential pressure flow-speed measurement devices, is surveyed based on PLC control system and mechanical pointwise circulation
Amount, as the measurement apparatus of online differential pressure flow velocity, by single-point S types Pitot tube differential pressure measurement mode of the prior art be improved to by
Dot cycle measures differential pressure, for pollutant emission enterprise provides a kind of selectable flue gas flow rate measurement apparatus.
Further, in above-mentioned differential pressure type measuring device, the PLC control system controls S type skins by its onboard clock
Time of measuring of the trustship in cross sections point position.
Further, in above-mentioned differential pressure type measuring device, the PLC control system controls S types by its built-in counter
Displacement of the Pitot tube between section point position.
Further, in above-mentioned differential pressure type measuring device, the PLC control system, by changing the current electrode of motor,
The rotating of motor is realized, and then realizes that S types Pitot tube enters and exit the action of flue.
Further, in above-mentioned differential pressure type measuring device, also include：The differential pressure transmitter being connected with S type Pitot tubes.Institute
S types Pitot tube is stated to be connected with differential pressure transmitter by a flexible pipe.The flexible pipe is set in retractable spiral shape.
The application flexible pipe is the flexible pipe that the resilient telescopic helical form of tool is set, in order to the flexible of S type Pitot tubes
Motion.
Further, in above-mentioned differential pressure type measuring device, also include：Roller, specifically for S types Pitot tube and driving cog
Bar forms positioning action.
Further, in above-mentioned differential pressure type measuring device, also include：The fixing device of holding movable device.The fixation
Device is set in the groove profile of open at both ends.
Further, in above-mentioned differential pressure type measuring device, also include：The support meanss of supporting adn fixing device.
As shown in Figures 3 to 5, a kind of specific embodiment of the differential pressure type measuring device for being provided for the present invention.Wherein, it is described
Being installed in support frame 2, the support meanss 1 in support meanss 1 can place differential pressure transmitter 8 and PLC control system 9；Institute
The fixing device for being placed with support frame 2 and being passed through for driving rack 3 and S types Pitot tube 4 is stated, the fixing device is an opening U
Type groove 5.The S types Pitot tube 4 is fixedly connected with driving rack 3；Drive driving rack 3 is provided with the top of the driving rack 3
The motor coaxle gear 6 of motion；The motor coaxle gear 6 connects a motor 7；The motor 7 is connected with PLC control system 9；
The differential pressure transmitter 8 is connected by a flexible pipe 12 with S types Pitot tube 4.
Specifically, the motor 7 can be screwed in the outer side of open U-type groove 5, it is connected with motor coaxle gear 6.
The embodiment of the present application operation principle is as follows：The triggering motor 7 of PLC control system 9 works, and motor 7 passes through motor coaxle
Gear 6, drives the driving rack 3 to move, and the S types Pitot tube 4 is fixed together with the driving rack 3, and then drives
The S types Pitot tube 4 enters or exits flue motion.
The application is fixed due to S types Pitot tube and driving rack, it is to avoid similar manual Pitot tube differential pressure method flow-speed measurement,
Human factor error caused by armed angle.The embodiment of the present application is based on PLC control system and circulates measurement with mechanical pointwise
The purpose of online multiple spot differential pressure flow-speed measurement is reached, reduces measurement error, the requirement that flue gas flow rate monitors performance assessment criteria can be met.
Further, in above-described embodiment, also include：The roller 11 of the top of driving rack 3 is arranged at, the roller 11 has
Body is used to form positioning action to driving rack 3 and S types Pitot tube 4.The setting of the embodiment of the present application roller 11, can prevent transmission
There is one end sinking, the phenomenon that one end upwarps during entering or exiting flue in tooth bar 3 and S types Pitot tube 4.
Further, in above-described embodiment, the bottom of open U-type groove 5 is provided with conveying S types Pitot tube 4 and driving rack 3
Driving drum 10.The setting of the embodiment of the present application driving drum 10, can reduce friction, facilitate S types Pitot tube 4 and driving rack
3 motion.
Further, in above-described embodiment, the PLC control system 9, specifically for entering or exiting in S types Pitot tube 4
During flue, trigger the motor 7 and drive S types Pitot tube 4 to move, carry out section by Point Measurement.
The embodiment of the present application uses S type Pitot tube differential pressure flow-speed measurement devices, based on PLC control system and mechanical pointwise
Circulation measurement, as the measurement apparatus of online differential pressure flow velocity, single-point S types Pitot tube differential pressure measurement mode of the prior art is changed
It is pointwise circulation measurement differential pressure to enter, for pollutant emission enterprise provides a kind of selectable flue gas flow rate measurement apparatus.
Specifically, as shown in fig. 6, the PLC control system control of the differential pressure type measuring device according to the application one side
Motor drives the course of work of S types Pitot tube movement as follows：
During S types Pitot tube enters flue, measured at the 1st point 15 minutes, it is described by PLC triggering afterwards
Motor, drives S type Pitot tubes to move at the 2nd point and measures 15 minutes, and 5 differential pressure flow velocity average values of section point position are measured successively,
Complete the point-to-point measurement that S types Pitot tube enters flue direction.
During S type Pitot tubes exit flue, same pointwise cross sections are measured 15 minutes, are sequentially completed 5 and are broken
After the differential pressure flow velocity measurement of average value of millet cake position, S type Pitot tubes return to initial measurement position.So far, complete to enter cigarette
Road direction and the one cycle measurement for exiting flue direction, then, then start next round circulation measurement.
, by the circulation measurement of pointwise position, certainty of measurement is high, and error is small for the application, be stationary source flue gas CEMS debugging and
Check and accept, and the season of environmentally friendly supervision department compares, there is provided reliable flue gas flow rate measurement result.The application pointwise circulation measurement
Process is full-automatic, effectively increases the certainty of measurement of S type Pitot tube differential pressure flowmeters.
Further, in above-mentioned differential pressure type measuring device, the PLC control system 9 controls S types by its onboard clock
Time of measuring of the Pitot tube 4 in cross sections point position.
When the embodiment of the present application can be precisely controlled the measurement of cross sections point position by the onboard clock of PLC control system
Between.The application single-point section survey time is controlled by the onboard clock of PLC control system, and the single-point section survey time is more accurate.
Further, in above-mentioned differential pressure type measuring device, the PLC control system 9 controls S by its built-in counter
Displacement of the type Pitot tube 4 between section point position.
Displacement of the embodiment of the present application S types Pitot tube between each section point position, by the built-in of PLC control system
Counter is completed, the displacement between precise control section point position.Displacement between each section point position of the application, by
The built-in counter controls of PLC control system, it is more precisely, in hgher efficiency than manual test personnel by visually observing.
Further, in above-mentioned differential pressure type measuring device, the PLC control system 9, by the power supply electricity for changing motor 7
Pole, realizes the rotating of motor 7, and then realizes that S types Pitot tube 4 enters and exit the action of flue.
As shown in fig. 7, the application PLC control system triggers output point Q to control centre by its built-in time relay
Relay, the power supply of motor is changed into normally opened contact from normally-closed contact, and motor is being realized just by changing the current electrode of motor
Reversion, and then realize that S types Pitot tube enters and exit the action of flue.
Further, in above-mentioned differential pressure type measuring device, the PLC control system, preferable use Siemens S7-
200 small PLCs, it is with low cost.
Optionally, in above-mentioned differential pressure type measuring device, the motor uses 12V direct current generators.
The application is based on PLC control system and circulates measurement with mechanical pointwise, reaches online multiple spot differential pressure flow-speed measurement
Purpose.Compared with artificial Pitot tube differential pressure method flow-speed measurement, measurement error is reduced, improve operating efficiency, can more meet cigarette
The requirement of air-flow slowdown monitoring performance assessment criteria.Additionally, the application is compared with heat-conducted and supercritical ultrasonics technology flowmeter, it is cost-effective；With
Matrix form differential pressure flowmeter is compared, and is installed, is safeguarded more convenient, it is easier to realizes.
To sum up, the application uses most common, most common S type Pitot tube differential pressure flow-speed measurement devices, and system is controlled based on PLC
System and mechanical pointwise circulation measurement differential pressure, as the measurement apparatus of online differential pressure flow velocity, completely with artificial S types Pitot tube differential pressure
The measurement of method matches, but compared with artificial Pitot tube differential pressure method, the application certainty of measurement is higher, and error is smaller.The application will
Single-point S type Pitot tube differential pressure measurement modes be changed to pointwise circulation measurement differential pressure, for pollutant emission enterprise provide one kind it is optional
The flue gas flow rate metering system selected is stationary source flue gas CEMS debugging and is checked and accepted, and environmentally friendly supervision department season ratio
It is right, there is provided reliable flue gas flow rate measurement result.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit herein or essential characteristic, the application can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present application is by appended power
Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the application.Any reference in claim should not be considered as the claim involved by limitation.This
Outward, it is clear that " including " word is not excluded for other units or step, odd number is not excluded for plural number.The multiple stated in device claim
Unit or device can also be realized by a unit or device by software or hardware.The first, the second grade word is used for table
Show title, and be not offered as any specific order.
Claims (10)
1. a kind of differential pressure type measuring device, it is characterised in that including：
S type Pitot tubes, and the mobile device of S types Pitot tube motion is driven, the mobile device includes driving rack and gear,
And/or roller, the S types Pitot tube is fixedly connected with driving rack.
2. differential pressure type measuring device according to claim 1, it is characterised in that the gear setting symmetrical above and below, or rolling
Cylinder setting symmetrical above and below, or gear and roller setting symmetrical above and below.
3. differential pressure type measuring device according to claim 1 and 2, it is characterised in that also include：The electricity of drive gear operating
Machine, and the PLC control system with motor connection.
4. differential pressure type measuring device according to claim 3, it is characterised in that the PLC control system onboard clock and
Counter, controls the motion of S type Pitot tubes.
5. the differential pressure type measuring device according to claim 1 or 4, it is characterised in that also include：It is connected with S type Pitot tubes
Differential pressure transmitter.
6. differential pressure type measuring device according to claim 5, it is characterised in that the S types Pitot tube by a flexible pipe with
Differential pressure transmitter is connected.
7. differential pressure type measuring device according to claim 6, it is characterised in that the flexible pipe sets in retractable spiral shape
Put.
8. the differential pressure type measuring device according to claim 1 or 7, it is characterised in that also include：Roller, holding movable dress
The fixing device put, and supporting adn fixing device support meanss.
9. differential pressure type measuring device according to claim 8, it is characterised in that the fixing device in open at both ends groove
Type is set.
10. the differential pressure type measuring device according to claim 1 or 9, it is characterised in that the S types Pitot tube and driving cog
Bar is fixedly connected by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621387127.4U CN206258479U (en) | 2016-12-16 | 2016-12-16 | A kind of differential pressure type measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621387127.4U CN206258479U (en) | 2016-12-16 | 2016-12-16 | A kind of differential pressure type measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206258479U true CN206258479U (en) | 2017-06-16 |
Family
ID=59029504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621387127.4U Expired - Fee Related CN206258479U (en) | 2016-12-16 | 2016-12-16 | A kind of differential pressure type measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206258479U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771340A (en) * | 2016-12-16 | 2017-05-31 | 上海华川环保科技有限公司 | A kind of differential pressure type measuring device |
| CN112083189A (en) * | 2020-07-17 | 2020-12-15 | 华电电力科学研究院有限公司 | Semi-embedded pipeline movable pitot tube wind speed measuring device and working method |
-
2016
- 2016-12-16 CN CN201621387127.4U patent/CN206258479U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771340A (en) * | 2016-12-16 | 2017-05-31 | 上海华川环保科技有限公司 | A kind of differential pressure type measuring device |
| CN112083189A (en) * | 2020-07-17 | 2020-12-15 | 华电电力科学研究院有限公司 | Semi-embedded pipeline movable pitot tube wind speed measuring device and working method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206258479U (en) | A kind of differential pressure type measuring device | |
| CN203215651U (en) | Remote on-line monitoring system for industrial boiler | |
| CN101782591B (en) | Groundwater flow speed and flow direction detection method and device using temperature as tracer | |
| CN103364580A (en) | System and method for multi-point grid on-line flow velocity measurement | |
| CN106771340A (en) | A kind of differential pressure type measuring device | |
| CN112762869B (en) | Rock slope deformation detection method and system | |
| CN107816961A (en) | A kind of continuous measuring device of outer diameter tube size relative variation | |
| CN104631516A (en) | Portable wall space deformation monitoring device for reinforced soil retaining wall and monitoring method | |
| CN206074051U (en) | A kind of flue gas flowrate calibrating device based on porous probe | |
| CN208606852U (en) | A kind of hydraulic engineering water-level detecting device | |
| CN108716213A (en) | A kind of amount water installations, method and dredging method suitable for sandy channel | |
| CN204214697U (en) | A kind of gas sampling gun | |
| CN106385220B (en) | Photovoltaic plant multifunctional intellectual management method and system | |
| CN205209993U (en) | Carbon fiber sucker rod damage detection device | |
| CN103353538A (en) | Pitot tube apparatus for multiple-detection-point flue gas flow velocity measuring | |
| CN208633051U (en) | A kind of amount water installations suitable for sandy channel | |
| CN209085947U (en) | A kind of fire fighting truck hydraulic performance test device and system | |
| CN114001881A (en) | Building door and window air tightness detecting system | |
| CN208313482U (en) | A kind of flexible force moment testing device of cleaning spray boom of the toilet seat based on PLC | |
| CN203772703U (en) | Steel chimney corrosion monitoring system based on non-contact type ultrasonic technology | |
| CN211926801U (en) | Pipe distribution device for rock slope stability test | |
| CN207528193U (en) | A kind of device of achievable sound detecting pipe measuring for verticality | |
| CN112050889A (en) | Data inspection system for camera shooting water meter data center | |
| Luo et al. | Research and evaluation of the measurement uncertainty with the pipeline robot | |
| CN205300864U (en) | Boiler afterbody flue air leakage coefficient's quick detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170616 Termination date: 20201216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |