CN110058047A - Steam flow rate measuring system in a kind of runner - Google Patents
Steam flow rate measuring system in a kind of runner Download PDFInfo
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- CN110058047A CN110058047A CN201910395265.9A CN201910395265A CN110058047A CN 110058047 A CN110058047 A CN 110058047A CN 201910395265 A CN201910395265 A CN 201910395265A CN 110058047 A CN110058047 A CN 110058047A
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- pressure
- flow rate
- valve
- steam flow
- connecting pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/006—Details of instruments used for thermal compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
Steam flow rate measuring system in a kind of runner, belongs to steam flow rate field of measuring technique.The present invention is made of differential pressure measuring installation, gas clean-up device, steam physical parameter compensation device, Pitot tube is successively connect with the high-pressure side of high pressure connecting pipe, the high pressure valve of five valve groups, differential pressure transmitter, low pressure connecting pipe is successively connect with the low-pressure side of the low pressure valve of five valve groups, differential pressure transmitter, high-pressure inert gas device is successively connect with the certificated valve of regulating valve, degassing water installations, check-valves, five valve groups, and steam physical parameter compensation device is made of thermocouple and pressure transmitter.The pressure loss is small in measurement process of the present invention, can avoid measurement error caused by liquid evaporation in pilot solenoid, and be equipped with steam modified physical properties system, the steam flow rate in different runners can be accurately measured in the case where not causing the larger pressure loss.
Description
Technical field
The invention belongs to steam flow rate field of measuring technique, and in particular to steam flow rate measuring system in a kind of runner.
Background technique
The measurement of steam flow rate can be related in the application of the industrial steams such as heat supply heating, energy measurement and scientific experiment,
Accurate steam flow rate/flow measurement improves safety and economy concerning related industries application efficiency is improved, and science is in fact
Test the key for being able to be normally carried out.But due to influence steam flow rate/flow measurement factor it is more, the stability of measurement of correlation and
Precision is not good enough.In steam flow rate/flow measurement instrument based on differential pressure measurement principle, orifice-plate flowmeter application is universal, has
International standard, theoretical precision are high.But there is also certain measurement defects for orifice-plate flowmeter: (1) orifice-plate flowmeter is based on section
The principle of stream carries out steam flow rate measurement, and the pressure loss that will cause is larger, and performance driving economy is poor；(2) leading in connecting pipe
Press liquid has that evaporation loss, the difference of pilot liquid level can introduce biggish pressure measurement errors, in turn result in
Biggish data noise；(3) since the pressure loss and change in flow can cause steam physical parameter to change, traditional orifice-plate type
Steam flow rate/flowmeter measuring instrumentss do not have steam condition indemnifying measure, can introduce certain measurement error.
Summary of the invention
In view of the above-mentioned problems, the present invention provides steam flow rate measuring system in a kind of runner, can not cause it is larger
The steam flow rate in different runners is measured in the case where the pressure loss in real time, accurately, effectively improves the essence of steam flow rate measurement
True property.
To achieve the above object, steam flow rate measuring system in a kind of runner is filled by differential pressure measuring installation, gas clean-up
It sets, steam physical parameter compensation device composition, differential pressure measuring installation is connected by five valve groups 4 with gas clean-up device, steam object
The pressure of property parameter compensation device real-time measurement tested point, temperature value.
The differential pressure measuring installation is made of Pitot tube 1, high pressure connecting pipe 2, low pressure connecting pipe 3, differential pressure transmitter 5, skin
Trustship 1 is successively connect with the high-pressure side of high pressure connecting pipe 2, the high pressure valve of five valve groups 4, differential pressure transmitter 5, low pressure connecting pipe 3 according to
The secondary low-pressure side with the low pressure valve of five valve group 4, differential pressure transmitter 5 is connect.
The gas clean-up device is made of high-pressure inert gas device 9, regulating valve 8, degassing water installations 7, check-valves 6,
High-pressure inert gas device 9 is successively connect with the certificated valve of regulating valve 8, degassing water installations 7, check-valves 6, five valve group 4.
The steam physical parameter compensation device is made of thermocouple 10 and pressure transmitter 11.
The port of the Pitot tube 1 is located in pipeline, and the internal diameter of the dynamic pressure measuring point of Pitot tube 1 is described not less than 2.0 millimeters
The port hydrostatic measuring point of low pressure connecting pipe 3 is located at measurement pipeline wall surface, and 3 static pressure measurement position of low pressure connecting pipe and Pitot tube 1 are dynamic
Pressure point position is in identical height.
The high 0.1MPa or more of circuit pressure of differential pressure measuring installation described in the pressure ratio of the high-pressure inert gas device 9.
The air water that goes of the degassing water installations 7 is the water without any dissolved gas.
The high pressure connecting pipe 2, low pressure connecting pipe 3 are transparent pipe, and internal diameter is not less than 6.0 millimeters.
The beneficial effects of the present invention are:
Steam flow rate measuring system in a kind of runner of the invention, the pressure loss is small in measurement process, can avoid pilot power
Measurement error caused by liquid in pipe evaporates, and it is equipped with steam modified physical properties system, the larger pressure loss can not caused
In the case of accurately measure steam flow rate in different runners.
Detailed description of the invention
Fig. 1 is steam flow rate measuring system schematic diagram of the invention.
Specific embodiment:
The present invention will be further described with reference to the accompanying drawing:
Embodiment 1
The present invention relates to steam flow rate field of measuring technique, and in particular to the industrial steams such as heat supply heating, energy measurement are answered
With and scientific experiment in steam flow rate measuring system and method.
Steam flow rate measuring system in a kind of runner, by differential pressure measuring installation, gas clean-up device and steam physical parameter
Compensation device composition；
Differential pressure measuring installation is made of Pitot tube, connecting pipe and differential pressure transmitter, differential pressure transmitter high and low pressure side difference
It connects Pitot tube and the kinetic energy of steam is converted to pressure and passes to difference by connecting pipe by measurement pipeline wall static pressure measuring point, Pitot tube
Pressure transmitter measures acquisition by differential pressure transmitter；
Gas clean-up device by high-pressure inert gas, regulating valve, go air water, check-valves, five valve groups and connecting pipe to form, lead to
Overregulating valve cooperates the control high-pressure inert gas promotion of five valve groups to go air water to remove gas in connecting pipe and guarantee to fill in connecting pipe
Completely remove air water；
Steam physical parameter compensation device is made of thermocouple and pressure transmitter, is obtained at point position by measurement
Pressure and temp value, for combining the physical property for obtaining steam；
The hydrostatic measuring point of the Pitot tube is located at measurement pipeline wall surface, static pressure measurement position and Pitot tube dynamic pressure point position
In identical height；
The internal diameter of the Pitot tube is not less than 2.0 millimeters；Or (between 2.0 millimeters and 3.0 millimeters), with following unification；
The pressure ratio of the high-pressure inert gas measures the high 0.1MPa or more of circuit pressure；
It is described to go air water for the water without any dissolved gas；
The connecting pipe is transparent pipe, and internal diameter is not less than 6.0 millimeters；Or (between 6.0 millimeters and 12.0 millimeters)；
Fig. 1 is steam flow rate measuring system schematic diagram.
In figure, 3- Pitot tube, 2- connecting pipe, 3- connecting pipe, five valve group of 4-, 5- differential pressure transmitter, 6- check-valves, 7- degassing
Water, 8- regulating valve, 9- high-pressure inert gas, 10- thermocouple, 11- pressure transmitter.
The present invention is based on differential pressure measurement principles, but different steam flow rate stagnation methods is taken to be converted into the flow velocity of steam
Pressure measures, and the problems such as consider liquid evaporation and density compensation in connecting pipe；
As shown in Figure 1, differential pressure measuring installation is made of Pitot tube 1, connecting pipe 2, connecting pipe 3 and differential pressure transmitter 5, it is poor
Pressure transmitter high and low pressure side connects Pitot tube and measurement pipeline wall static pressure measuring point, the pressure that acquisition steam kinetic energy conversion generates respectively
Difference；Pressure stagnation element Pitot tube size of the invention is smaller, compared with orifice flowmeter throttles the caused pressure loss, this hair
The pressure loss caused by bright measurement can almost be ignored, therefore the driving force lost is smaller, and economy is higher；
Gas clean-up device by high-pressure inert gas 9, regulating valve 8, remove air water 7, check-valves 6, five valve groups 4 and connecting pipe 2
With 3 compositions, cooperates five valve groups to control high-pressure inert gas promotion by regulating valve and air water is gone to remove gas in connecting pipe；It can guarantee
Measuring cell and connecting pipe are each filled with pilot liquid in measurement process, avoid the measurement error as caused by liquid evaporation；
Steam physical parameter compensation device is made of thermocouple 10 and pressure transmitter 11, obtains point position by measurement
The pressure and temp value at place can obtain accurate steam physical parameter in real time, improve the measurement accuracy of steam flow rate；
Different from traditional Pitot tube, the internal diameter of the dynamic pressure measuring point of Pitot tube 1 of the invention is not less than 2.0 millimeters, can subtract
The measurement error as caused by surface tension and capillarity after small water-filling；The hydrostatic measuring point of Pitot tube 1 is located at measurement duct wall
Face, static pressure measurement position are in identical height with Pitot tube dynamic pressure point position, are increased in Pitot tube dynamic pressure measuring point with facilitating
Diameter；
In measurement process, the pressure of high-pressure inert gas 9 of the invention should be 0.1MPa or more higher than measurement circuit pressure, with
It conveniently goes air water smoothly to inject removal in connecting pipe and manages interior on-condensible gas；
Go air water 7 of the present invention used in measurement process is the water without any dissolved gas, to reduce due to gas
Fluid density error in connecting pipe caused by body improves measurement accuracy；
Connecting pipe 2 and 3 used in the present invention is transparent pipe, can facilitate and check in connecting pipe whether be mixed with gas；Pilot
The internal diameter of pipe is not less than 6.0 millimeters, or (between 6.0 millimeters and 12.0 millimeters)；To facilitate the gas removed in it；
Embodiment 2
Steam flow rate measuring system in a kind of runner, by differential pressure measuring installation, gas clean-up device and steam physical parameter
Compensation device composition, differential pressure measuring installation are connected with gas clean-up device.
Differential pressure measuring installation is made of Pitot tube 1, connecting pipe 2, connecting pipe 3 and differential pressure transmitter 5, differential pressure transmitter height,
Low-pressure side connects Pitot tube and measurement pipeline wall static pressure measuring point respectively.
Gas clean-up device by high-pressure inert gas 9, regulating valve 8, remove air water 7, check-valves 6, five valve groups 4 and connecting pipe 2
With 3 compositions, passes through regulating valve and cooperate five valve groups to remove gas in connecting pipe and guarantee in connecting pipe full of removing air water.
Steam physical parameter compensation device is made of thermocouple 10 and pressure transmitter 11, for measuring at point position
Pressure and temperature value obtain steam physical property.
The internal diameter of the dynamic pressure measuring point of Pitot tube 1 is not less than 2.0 millimeters, and hydrostatic measuring point is located at measurement pipeline wall surface, static pressure
Measurement position is in identical height with Pitot tube dynamic pressure point position.
The pressure of high-pressure inert gas 9 should be 0.1MPa or more higher than measurement circuit pressure.
Removing air water 7 is the water without any dissolved gas.
Connecting pipe 2 and 3 is transparent pipe, and internal diameter is not less than 6.0 millimeters.
Claims (8)
1. steam flow rate measuring system in a kind of runner is compensated by differential pressure measuring installation, gas clean-up device, steam physical parameter
Device composition, it is characterised in that: differential pressure measuring installation is connected by five valve groups (4) with gas clean-up device, steam physical parameter
The pressure of compensation device real-time measurement tested point, temperature value.
2. steam flow rate measuring system in a kind of runner according to claim 1, it is characterised in that: the differential pressure measurement dress
Set and be made of Pitot tube (1), high pressure connecting pipe (2), low pressure connecting pipe (3), differential pressure transmitter (5), Pitot tube (1) successively with height
Press connecting pipe (2), the high pressure valve of five valve groups (4), differential pressure transmitter (5) high-pressure side connection, low pressure connecting pipe (3) successively with institute
State the low-pressure side connection of the low pressure valve, differential pressure transmitter (5) of five valve groups (4).
3. steam flow rate measuring system in a kind of runner according to claim 1, it is characterised in that: the gas clean-up dress
It sets and is made of high-pressure inert gas device (9), regulating valve (8), degassing water installations (7), check-valves (6), high-pressure inert gas dress
(9) are set successively to connect with the certificated valve of regulating valve (8), degassing water installations (7), check-valves (6), five valve group (4).
4. steam flow rate measuring system in a kind of runner according to claim 1, it is characterised in that: the steam physical property ginseng
Number compensation device is made of thermocouple (10) and pressure transmitter (11).
5. steam flow rate measuring system in a kind of runner according to claim 1 or 2, it is characterised in that: the Pitot tube
(1) port is located in pipeline, and the internal diameter of the dynamic pressure measuring point of Pitot tube (1) is not less than 2.0 millimeters, the low pressure connecting pipe (3)
Port hydrostatic measuring point be located at measurement pipeline wall surface, low pressure connecting pipe (3) static pressure measurement position and Pitot tube (1) dynamic pressure measuring point position
It sets in identical height.
6. steam flow rate measuring system in a kind of runner according to claim 1 or 3, it is characterised in that: the high pressure is lazy
The high 0.1MPa or more of circuit pressure of differential pressure measuring installation described in the pressure ratio of property gas device (9).
7. steam flow rate measuring system in a kind of runner according to claim 1 or 3, it is characterised in that: described to remove air water
The air water that goes of device (7) is the water without any dissolved gas.
8. steam flow rate measuring system in a kind of runner according to claim 1 or 2, it is characterised in that: the high pressure is led
Pressure pipe (2), low pressure connecting pipe (3) are transparent pipe, and internal diameter is not less than 6.0 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395265.9A CN110058047A (en) | 2019-05-14 | 2019-05-14 | Steam flow rate measuring system in a kind of runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395265.9A CN110058047A (en) | 2019-05-14 | 2019-05-14 | Steam flow rate measuring system in a kind of runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110058047A true CN110058047A (en) | 2019-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395265.9A Pending CN110058047A (en) | 2019-05-14 | 2019-05-14 | Steam flow rate measuring system in a kind of runner |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054484A (en) * | 1990-02-27 | 1991-09-11 | 机械电子工业部重庆工业自动化仪表研究所 | Differential pressure type vortex street mass flowmeter |
| CN102830244A (en) * | 2012-09-07 | 2012-12-19 | 北京雪迪龙科技股份有限公司 | Flow velocity measuring device with pitot tube |
| CN202853656U (en) * | 2012-09-26 | 2013-04-03 | 天津通广集团数字通信有限公司 | Temperature, pressure and flow velocity integrated sampling device based gas flue |
| CN203719706U (en) * | 2014-01-26 | 2014-07-16 | 上海华林工业气体有限公司 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
| CN206269871U (en) * | 2016-10-21 | 2017-06-20 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flowmenter |
-
2019
- 2019-05-14 CN CN201910395265.9A patent/CN110058047A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054484A (en) * | 1990-02-27 | 1991-09-11 | 机械电子工业部重庆工业自动化仪表研究所 | Differential pressure type vortex street mass flowmeter |
| CN102830244A (en) * | 2012-09-07 | 2012-12-19 | 北京雪迪龙科技股份有限公司 | Flow velocity measuring device with pitot tube |
| CN202853656U (en) * | 2012-09-26 | 2013-04-03 | 天津通广集团数字通信有限公司 | Temperature, pressure and flow velocity integrated sampling device based gas flue |
| CN203719706U (en) * | 2014-01-26 | 2014-07-16 | 上海华林工业气体有限公司 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
| CN206269871U (en) * | 2016-10-21 | 2017-06-20 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flowmenter |
Non-Patent Citations (2)
| Title |
|---|
| 尉迟斌 等: "《制冷工程技术辞典》", 31 August 1991, 上海交通大学出版社 * |
| 陈泽峰: "《世界垃圾焚烧100年》", 30 September 2009, 福建科学技术出版社 * |
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Application publication date: 20190726 |
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