CN111121889A - Split type combined parameter instrument - Google Patents
Split type combined parameter instrument Download PDFInfo
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- CN111121889A CN111121889A CN202010055239.4A CN202010055239A CN111121889A CN 111121889 A CN111121889 A CN 111121889A CN 202010055239 A CN202010055239 A CN 202010055239A CN 111121889 A CN111121889 A CN 111121889A
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- split
- connector
- split connector
- sensor
- differential pressure
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- 239000000523 sample Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
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- 238000004880 explosion Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims 1
- 238000009434 installation Methods 0.000 description 9
- 238000005070 sampling Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000005341 toughened glass Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a split type combined parameter instrument, which comprises: a gauge head assembly; the upper end of the combined sensor is connected with the lower end of the gauge outfit assembly, a pressure sensor, a micro differential pressure sensor, a temperature signal line and a signal conversion circuit are arranged in the combined sensor, a tubular first split connector is arranged at the lower end of the combined sensor, and two differential pressure signal input channels and a temperature signal input line plug are arranged in the first split connector; the upper end of the three valve groups is provided with a tubular second split connector which is detachably connected with the first split connector, and a differential pressure signal output channel connected with a differential pressure signal input channel and a temperature signal line socket connected with a temperature signal input line plug are arranged in the second split connector; the pitot tube probe is arranged at the lower end of the three-valve group through a probe protecting tube and a sealing fastener, and a temperature sensor is arranged on the pitot tube probe.
Description
Technical Field
The invention relates to the technical field of metering instruments, in particular to a split type combined parameter instrument.
Background
At present, when monitoring the flow rate of a gas pipeline, a diffusing pipe and the like, various flow meters are often installed by cutting off a pipeline, welding a flange at the front and rear cut-off parts, and fastening a meter detection main body by using a plurality of bolts during installation. The flow meter adopting the installation mode is inconvenient to install and maintain.
Disclosure of Invention
The invention aims to solve the technical problems and provides a split type combined parameter instrument which is simple and convenient to install and maintain, more in functions, compact in structure, smaller in size and lower in cost.
The technical scheme adopted by the invention is as follows:
a split compound parameter meter comprising: the gauge head assembly comprises a shell, a display screen and a switch which are arranged on the front side of the shell, a circuit main board and a wiring terminal which are arranged in the shell, and a terminal cover which is arranged on the rear side of the shell; the upper end of the combined sensor is connected with the lower end of the gauge outfit assembly, a pressure sensor, a micro differential pressure sensor, a temperature signal line and a signal conversion circuit are arranged in the combined sensor, a tubular first split connector is arranged at the lower end of the combined sensor, and two differential pressure signal input channels and a temperature signal input line plug are arranged in the first split connector; the upper end of the three valve groups is provided with a tubular second split connector, the second split connector is detachably connected with the first split connector, and a differential pressure signal output channel connected with the differential pressure signal input channel and a temperature signal line socket connected with the temperature signal input line plug are arranged in the second split connector; the pitot tube probe is arranged at the lower end of the three-valve group through a probe protecting tube and a sealing fastener, and a temperature sensor is arranged on the pitot tube probe.
The shell is an explosion-proof aluminum shell, and the terminal cover comprises an explosion-proof joint.
The switch comprises a reed switch.
The first split connector is an external thread connector, and the second split connector is an internal thread connector.
The first split connector and the second split connector are connected, and a sealing ring is arranged between the first split connector and the second split connector.
The valve body of the three valve groups is internally provided with a valve seat with two channels, the lower part is an input channel, the upper part is an output channel, the two channels are respectively provided with a left stop valve and a right stop valve midway, the output channel is bridged with a balance valve, the left and the right of the upper plane are provided with output channel sealing matching rings, and the center of the upper plane is provided with the temperature signal line socket.
The sealing fastener comprises a fastening joint and a fastening nut.
The invention has the beneficial effects that:
by arranging the pitot tube probe, the sampling joint of the original pressure gauge of the pipeline to be tested can be directly utilized, or the installation joint is additionally arranged on the pipeline to be tested by pre-forming the installation hole, so that the installation of a pipe cutting welding flange is not needed, and the installation is simple; through the split design of the gauge head assembly, the combined sensor part, the three-valve group and the pitot tube probe part, the gauge head assembly and the sensor can be conveniently replaced, and subsequent elements are additionally arranged, so that the mounting and maintenance are simple and convenient; the pressure and micro differential pressure combined sensor is adopted, pressure signal sampling is also considered while differential pressure signal sampling is obtained, meanwhile, the smoothness of a signal line of the temperature sensor is considered by arranging the temperature sensor, simultaneous acquisition of three signals can be realized, the functions are multiple, the structure is compact, the size is small, and the cost can be reduced.
Drawings
FIG. 1 is a front view of a split-type combination parameter meter according to an embodiment of the present invention;
FIG. 2 is a side view of the split combination parameter meter of one embodiment of the present invention after being split;
FIG. 3 is a front view of the split type combination parameter meter according to one embodiment of the present invention;
fig. 4 is a schematic view of a partial internal structure of a split-type combination parameter meter according to an embodiment of the present invention.
Reference numerals:
1-gauge head assembly, 2-combined sensor, 3-three valve group, 4-pitot tube probe;
11-shell, 12-display screen, 13-switch, 14-circuit board, 15-wiring terminal, 16-terminal cover, 17-explosion-proof joint, 18-screw and 19-toughened glass;
21-a pressure sensor, 22-a micro differential pressure sensor, 23-a temperature signal line, 24-a first split connector, 25-a differential pressure signal input channel, 26-a temperature signal input line plug and a fixed connector 27;
31-a second split connector, 32-a differential pressure signal output channel, 33-a temperature signal line socket, 34-a left stop valve, 35-a right stop valve, 36-a balance valve, 37-a sealing inosculating ring and 38-a sealing ring;
41-probe protection tube, 42-temperature sensor, 43-Pitot total pressure tube, 44-Pitot static pressure tube, 45-leading-out wire, 46-fastening joint and 47-fastening nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the split type combination parameter meter of the embodiment of the invention comprises a gauge head assembly 1, a combination sensor 2, a three-valve set 3 and a pitot probe 4. As shown in fig. 2, 3 and 4, the gauge head assembly 1 includes a case 11, a display 12 and a switch 13 provided on the front side of the case 11, a circuit board 14 and a connection terminal 15 provided in the case 11, and a terminal cover 16 provided on the rear side of the case 11; the combined sensor 2 is internally provided with a pressure sensor 21, a micro differential pressure sensor 22, a temperature signal line 23 and a signal conversion circuit, the lower end of the combined sensor 2 is provided with a tubular first split connector 24, and the first split connector 24 is internally provided with two differential pressure signal input channels 25 and a temperature signal input line plug 26; the upper end of the three valve group 3 is provided with a tubular second split connector 31, the second split connector 31 is used for being detachably connected with the first split connector 24, and a differential pressure signal output channel 32 connected with the differential pressure signal input channel 25 and a temperature signal line socket 33 connected with the temperature signal input line plug 26 are arranged in the second split connector 31; the pitot tube probe 4 is arranged at the lower end of the three-valve group 3 through a probe protecting tube 41 and a sealing fastener, and a temperature sensor 42 is arranged on the pitot tube probe 4.
In one embodiment of the present invention, housing 11 is an explosion proof aluminum housing, and as shown in fig. 2, terminal cover 16 includes explosion proof connector 17. Through the explosion-proof design, the safety of the split type combined parameter instrument applied to scenes such as each gas pipeline and the diffusing pipe of the gas pressure regulating station can be improved. As shown in fig. 2 and 3, the front and rear portions of the case 11 may be fixed by screws 18, and the gauge outfit assembly 1 may further include a tempered glass 19. In an embodiment of the present invention, the switch 13 may include a magnetically conductive reed switch, and the magnetic body may be arranged near a determination key, a raising key and a lowering key below the tempered glass 19, so that the magnetic induction operation may be performed on the reed switches at the left, middle and right 3 positions where the tempered glass 19 is installed, respectively. Therefore, the magnetic tool can be utilized to approach the magnetic induction reed switch for conduction, the misoperation prevention magnetic induction isolation setting key capable of inputting the measured pipe diameter data is formed, and the setting data of the measured pipe diameter can be displayed through the display screen.
In an embodiment of the present invention, the lower end of the gauge head assembly 1 may be provided with an internal threaded hole, and is screwed and fixed with the fixing joint 27 having an external thread at the upper end of the combination sensor 2, so that the gauge head assembly 1 and the combination sensor 2 form the upper part of the split type combination parameter instrument.
In an embodiment of the present invention, the valve body of the three valve groups 3 has two valve seats with two channels, the lower part is an input channel, the upper part is an output channel, as shown in fig. 2, 3 and 4, the two channels are respectively provided with a left stop valve 34 and a right stop valve 35 in the middle, the output channel is bridged with a balance valve 36, the left and right output channels 32 on the upper plane are communicated with two sealing insertion holes contacting with a copper sheet and are provided with an output channel sealing matching ring 37, and the center of the upper plane is provided with a temperature signal line socket 33.
As shown in fig. 2, 3 and 4, the pitot probe 4 may include a pitot total pressure tube 43 and a pitot static pressure tube 44, and the temperature sensor 42 may be disposed between the pitot total pressure tube 43 and the pitot static pressure tube 44 and connected to the temperature signal line socket 33 by an outgoing line 45. The pitot tube probe 4 can be inserted into the probe protective tube 41, the sealing fastener comprises a fastening connector 46 and a fastening nut 47, the probe protective tube 41 can be welded at the lower end of the three-valve set 3, the pitot tube probe 4 can be fixed in the probe protective tube 41 through the matching of the fastening nut 47 and the fastening connector 46, and the pitot tube probe 4 and the three-valve set 3 form the lower part of the split type combined parameter instrument.
In one embodiment of the invention, the pitot tube probe 4 and the probe sheath 41 may be both stainless steel.
In one embodiment of the present invention, the first split connector 24 may be an external threaded connector, the second split connector 31 may be an internal threaded connector, and when the first split connector 24 is connected to the second split connector 31, a sealing ring 38 may be further disposed between the first split connector 24 and the second split connector 31. The upper part and the lower part can be connected by connecting the first split connector 24 of the lower end of the combination sensor 2 and the second split connector 31 of the upper end of the three-valve block 3. When the upper part and the lower part are connected, the external thread connector and the internal thread connector can be screwed down to form the fastening sealing connection of the upper part and the lower part which are isolated from the external atmospheric environment, the plug type differential pressure signal input channel 25 can be inserted into a sealing jack which is communicated with the differential pressure signal output channel 32 and is provided with a contact copper sheet, namely, a differential pressure signal source is connected, and the temperature signal input line plug 26 can be inserted into a temperature signal line socket 33, namely, a temperature signal source is connected, so that the upper part and the lower part form.
When the device is used, after the field pipeline of the split type combined parameter instrument is installed, the depth and the angle can be adjusted, the fastening screw cap is screwed, the terminal cover with the explosion-proof joint is screwed on the rear side of the shell of the gauge head assembly, the four-core rubber wire penetrates through the explosion-proof joint and the holes of the terminal cover, the wiring terminal is connected with a 16V-24V direct-current stabilized voltage power supply and an RS485 communication wire, the terminal cover is covered, and then the split type combined parameter instrument is electrified. And then, carrying out the following three steps of operation on the three valve groups (when the three valve groups are not used, the balance valves of the three valve groups are in a conducting state, and the left and right stop valves are in a closed state): s1, before the pressure of the tested pipeline is increased, firstly, checking that the balance valves of the three valve groups are in an open state, the left and right stop valves are in a closed state, and otherwise, restoring the specified state; s2, unscrewing the balance valve to a conducting state by using a special tool, and unscrewing the left stop valve and the right stop valve to the conducting state respectively; s3, checking whether the display screen of the split type combined parameter instrument is abnormal, closing the balance valve after confirming that the display screen is abnormal (when the gauge head assembly and the combined sensor need to be replaced, namely the upper part, the balance valve is opened firstly, the left stop valve and the right stop valve are closed, the measuring channel is closed, then the internal and external threaded connectors can be unscrewed by using a tool, the gauge head assembly and the combined sensor are dismounted), and if a medium flows in the measured pipeline, the display screen of the split type combined parameter instrument has digital display. And then the magnetic body is used for approaching an operation isolation setting key, the pipe diameter size data of the measured pipeline is input, then the setting is finished after a determination key is pressed, and in addition, the RS485 communication address needs to be selected.
The embodiment of the invention adopts the RS485 communication protocol to realize the functions of remote monitoring and data storage, and is convenient for management and maintenance.
The embodiment of the invention carries out micro differential pressure detection on the flow of the gas pipeline by using a Pitot tube measuring principle, can acquire the central fluid flow velocity (full pressure-static pressure is equal to dynamic pressure) of the pipeline, and then multiplies the central fluid flow velocity by the sectional area (flow is equal to central flow velocity multiplied by sectional area) of the pipeline to be detected, and automatically converts the central fluid flow velocity and the sectional area into the working condition flow and the standard condition flow of the fluid.
According to the split type combined parameter instrument provided by the embodiment of the invention, the pitot tube probe is arranged, so that a sampling joint of an original pressure gauge of a measured pipeline can be directly utilized, or an installation joint is additionally arranged on the measured pipeline by pre-forming an installation hole, therefore, a pipe does not need to be cut and a welding flange is not required to be installed, and the installation is simple; through the split design of the gauge head assembly, the combined sensor part, the three-valve group and the pitot tube probe part, the gauge head assembly and the sensor can be conveniently replaced, and subsequent elements are additionally arranged, so that the mounting and maintenance are simple and convenient; the pressure and micro differential pressure combined sensor is adopted, pressure signal sampling is also considered while differential pressure signal sampling is obtained, meanwhile, the smoothness of a signal line of the temperature sensor is considered by arranging the temperature sensor, simultaneous acquisition of three signals can be realized, the functions are multiple, the structure is compact, the size is small, and the cost can be reduced.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A split compound parameter meter, comprising:
the gauge head assembly comprises a shell, a display screen and a switch which are arranged on the front side of the shell, a circuit main board and a wiring terminal which are arranged in the shell, and a terminal cover which is arranged on the rear side of the shell;
the upper end of the combined sensor is connected with the lower end of the gauge outfit assembly, a pressure sensor, a micro differential pressure sensor, a temperature signal line and a signal conversion circuit are arranged in the combined sensor, a tubular first split connector is arranged at the lower end of the combined sensor, and two differential pressure signal input channels and a temperature signal input line plug are arranged in the first split connector;
the upper end of the three valve groups is provided with a tubular second split connector, the second split connector is detachably connected with the first split connector, and a differential pressure signal output channel connected with the differential pressure signal input channel and a temperature signal line socket connected with the temperature signal input line plug are arranged in the second split connector;
the pitot tube probe is arranged at the lower end of the three-valve group through a probe protecting tube and a sealing fastener, and a temperature sensor is arranged on the pitot tube probe.
2. The split modular parameter meter of claim 1, wherein the housing is an explosion proof aluminum housing and the terminal cover includes an explosion proof joint.
3. The split compound parametric gauge of claim 1, wherein the switch comprises a reed switch.
4. The split type combined parameter instrument according to claim 1, wherein the first split connector is an external threaded connector, and the second split connector is an internal threaded connector.
5. The split type combination parameter instrument according to claim 4, wherein a sealing ring is provided between the first split connector and the second split connector when the first split connector and the second split connector are connected.
6. The split type combined parameter instrument according to claim 1, wherein the valve body of the three valve groups is internally provided with a valve seat with two channels, the lower part is provided with an input channel, the upper part is provided with an output channel, the two channels are respectively provided with a left stop valve and a right stop valve in the middle, a balance valve is bridged between the output channels, the left and the right of the upper plane are provided with output channel sealing matching rings, and the center of the upper plane is provided with the temperature signal line socket.
7. The split modular parameter meter of claim 1, wherein the sealing fastener comprises a fastening nipple and a fastening nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010055239.4A CN111121889A (en) | 2020-01-17 | 2020-01-17 | Split type combined parameter instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010055239.4A CN111121889A (en) | 2020-01-17 | 2020-01-17 | Split type combined parameter instrument |
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| Publication Number | Publication Date |
|---|---|
| CN111121889A true CN111121889A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010055239.4A Pending CN111121889A (en) | 2020-01-17 | 2020-01-17 | Split type combined parameter instrument |
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| CN (1) | CN111121889A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201561770U (en) * | 2009-12-02 | 2010-08-25 | 上海华强仪表有限公司 | Hot air mass flow meter with temperature output |
| CN203534645U (en) * | 2013-11-21 | 2014-04-09 | 王忠辉 | Pitot flow sensor provided with mounting mark |
| CN205826045U (en) * | 2016-03-21 | 2016-12-21 | 金洪光 | Pitot formula diffuses flow monitoring instrument |
| CN107976222A (en) * | 2016-10-21 | 2018-05-01 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flow measurement methods |
| CN211477247U (en) * | 2020-01-17 | 2020-09-11 | 北京市天茏利华科技有限责任公司 | Split type combined parameter instrument |
-
2020
- 2020-01-17 CN CN202010055239.4A patent/CN111121889A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201561770U (en) * | 2009-12-02 | 2010-08-25 | 上海华强仪表有限公司 | Hot air mass flow meter with temperature output |
| CN203534645U (en) * | 2013-11-21 | 2014-04-09 | 王忠辉 | Pitot flow sensor provided with mounting mark |
| CN205826045U (en) * | 2016-03-21 | 2016-12-21 | 金洪光 | Pitot formula diffuses flow monitoring instrument |
| CN107976222A (en) * | 2016-10-21 | 2018-05-01 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flow measurement methods |
| CN211477247U (en) * | 2020-01-17 | 2020-09-11 | 北京市天茏利华科技有限责任公司 | Split type combined parameter instrument |
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