CN108917891A - A kind of high-temp liquid flow standard device - Google Patents
A kind of high-temp liquid flow standard device Download PDFInfo
- Publication number
- CN108917891A CN108917891A CN201811146407.XA CN201811146407A CN108917891A CN 108917891 A CN108917891 A CN 108917891A CN 201811146407 A CN201811146407 A CN 201811146407A CN 108917891 A CN108917891 A CN 108917891A
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- water
- water tank
- ball valve
- test
- hot water
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- 239000007788 liquid Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 158
- 238000012360 testing method Methods 0.000 claims abstract description 81
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000005303 weighing Methods 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims description 38
- 238000004064 recycling Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 12
- 238000011160 research Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/14—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of high-temp liquid flow standard device, including checklist, hot water water tank, proving flowmeter, weighing container, electronic scale and water tank, hot water water tank passes through test pipeline connection water tank；On direction by hot water water tank to water tank, testing tube road is disposed with test water pump, the first test ball valve, checklist, the first thermometer, test pressure gauge, the second test ball valve, proving flowmeter, electric control valve, third test ball valve, heat exchanger, the 4th test ball valve, second temperature meter, commutator, third thermometer, weighing container and the 5th test ball valve；The cooling water inlet pipe road of heat exchanger is provided with cooling flow meter and water circulating pump；One pipeline of commutator is connected to water tank by weighing container, and another pipeline is directly connected to water tank；Weighing container is placed on electronic scale.The device is more than to be made a service test at 100 DEG C to checklist in water temperature using method of standard table and mass method, and accurately, error is small for measurement.
Description
Technical field
The present invention relates to flow measurement technical field more particularly to a kind of high-temp liquid flow standard devices.
Background technique
Liquid flow standard device is the measurement criteria for liquid flow mearuement utensil magnitude tracing.Such as water meter, electromagnetism
Flowmeter etc., for the measurement instrument of gauge fluid flow, accuracy needs to carry out it by liquid flow standard device
Calibrating or calibration.
Different according to the temperature range of medium under normal circumstances, liquid flow standard device is divided into (cold) water flow standard dress
It sets and hot water flow standard set-up.If cold-water meter (cold) water flow standard apparatus of household is examined and determine, calorimeter hot water stream
Measure standard set-up calibrating.The work of (cold) water flow standard apparatus medium temperature is at 30 DEG C hereinafter, Jie of hot water flow standard set-up
Matter temperature is generally in room temperature to 90 DEG C of ranges.
The temperature of some flow measurement utensil working medias is more than 100 DEG C, to the liquid flow mearuement more than 100 DEG C of conditions
Utensil carries out Actual flow test, then just needing high-temp liquid flow standard device.To carry out high-temp liquid flow measurement utensil
The research and test of meter characteristic, the development of high-temp liquid flow standard device and construction, which have, is highly desirable to meaning.
Summary of the invention
The present invention provides a kind of high-temp liquid flow standard devices, to solve the metering of high-temp liquid flow measurement utensil
The problem of research and test of characteristic.
High-temp liquid flow standard device provided by the invention, including checklist, hot water water tank, proving flowmeter, title
Measure container, electronic scale and water tank, wherein checklist is the flow measurement utensil tested, and hot water water tank is to store 100
DEG C or more hot water, and by test pipeline connection water tank；On direction by hot water water tank to water tank, testing tube road
It is disposed with test water pump, the first test ball valve, checklist, the first thermometer, test pressure gauge, the second test ball valve, mark
Quasi- flowmeter, electric control valve, third test ball valve, heat exchanger, the 4th test ball valve, second temperature meter, commutator, third temperature
Degree meter, weighing container and the 5th test ball valve；The cooling water outlet pipe road of heat exchanger is connected to cooling with cooling water inlet pipe road
Pond, cooling water inlet pipe road are provided with cooling flow meter and water circulating pump；One pipeline of commutator passes through weighing container
It is connected to water tank, another pipeline is directly connected to water tank；Weighing container is placed on electronic scale；It further include the first recycling
Pipeline and the second recovery pipe, wherein the first recovery pipe is recycled from water tank to hot water water tank, and according to direction of recession,
Recovered water pump and recycling check-valves are disposed in first recovery pipe；Second recovery pipe is by testing tube road direction hot water water storage
Tank recycling, and recycling ball valve is provided in the second recovery pipe.
Optionally, hot water water tank is heated sealed water tank, is provided with and communicated with circulating-heating on heated sealed water tank
Pipeline, steam adjust pipeline, pressure controller, relief valve, hot water temperature's meter and heat hydraulic pressure table, Recovery of the hot water pipeline and hot water
Check-valves, wherein circulation heating tube returns to sealing by water circulating pump and heating circuit heat exchanger by heated sealed water tank
Cylinder, the hot fluid of heating circuit heat exchanger are the steam from boiler；Steam adjusts pipeline and steam is passed through decompression
Valve and steam ball valve are sent into heated sealed water tank；Recovery of the hot water pipeline is recycled from heated sealed water tank to water tank, hot water
Recovery of the hot water ball valve is provided in recovery pipe.
Optionally, hot water water tank is open hot water water tank, is provided with open water inlet on open hot water water tank
It is counted with hot water temperature.
It optionally, further include controller, controller control connection pressure controller, relief valve, hot-water check valve, decompression
Valve, steam ball valve, Recovery of the hot water ball valve, test water pump, the first test ball valve, the second test ball valve, electric control valve, third are surveyed
Try valve, the 4th test ball valve, the 5th test ball valve, water circulating pump, recovered water pump, recycling check-valves, recycling ball valve.
The invention has the advantages that：
The present invention relates to a kind of high-temp liquid flow standard device, medium temperature is more than 100 DEG C of fluid flow standard dress
It sets, the carry out metering performance test that the present invention can have flow gauge under the conditions of medium temperature is more than 100 DEG C.The present invention
Two kinds of test method contrast tests of method of standard table and mass method can be used, measurement is accurate, and error is small.
In addition, the present invention heats test(ing) medium using the method for heated sealed water tank, make medium heated
It will not be evaporated in journey；Hot water flows out before pipeline, the temperature of hot water can be dropped to 100 DEG C hereinafter, reducing by heat exchanger
Hot water flows into the evaporation after weighing container, it is ensured that when using mass method measurement, has preferable accuracy.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of high-temp liquid flow standard device provided by the invention；
Fig. 2 is the structural schematic diagram of another high-temp liquid flow standard device provided by the invention.
Each label respectively indicates in Fig. 1 and Fig. 2：1- checklist, 2- hot water water tank, 3- proving flowmeter, 4-, which are weighed, to be held
Device, 5- electronic scale, 6- water tank, 7- test pipeline, 8- cooling water outlet pipe road, 9- cooling water inlet pipe road, 10- cooling water
Pond, the first recovery pipe of 11-, the second recovery pipe of 12-, 2A- heated sealed water tank, the open hot water water tank of 2B-, 21- are followed
Ring heats pipeline, 22- steam adjusts pipeline, 23- pressure controller, 24- relief valve, 25- hot water temperature meter, 26- heat hydraulic pressure
Table, 27- Recovery of the hot water pipeline, 28- hot-water check valve, 29- water inlet, 211- water circulating pump, 212- heating circuit heat exchanger,
221- pressure reducing valve, 222- steam ball valve, 271- Recovery of the hot water ball valve, 71- test water pump, 72- first test ball valve, 73- first
Thermometer, 74- test pressure gauge, 75- second test ball valve, 76- electric control valve, 77- third test ball valve, 78- heat exchanger,
79- the 4th tests ball valve, 710- second temperature meter, 711- commutator, 712- third thermometer, 713- the 5th and tests ball valve, 91-
Cooling flow meter, 92- water circulating pump, 111- recovered water pump, 112- recycling check-valves, 121- recycle ball valve.
Specific embodiment
The present invention provides a kind of high-temp liquid flow standard devices, to solve the metering of high-temp liquid flow measurement utensil
The problem of research and test of characteristic.Following will be combined with the drawings in the embodiments of the present invention, to the technology in the embodiment of the present invention
Scheme is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, for the high-temp liquid flow standard device that the present embodiment 1 provides, including checklist 1, hot water water storage
Tank 2, proving flowmeter 3, weighing container 4, electronic scale 5 and water tank 6.
Specifically, checklist 1 is the flow measurement utensil tested, and 2 (not shown) of hot water water tank is that sealing adds
Hot water tank 2A is the hot water to heat and store 100 DEG C or more.Circulation is provided with and communicated on heated sealed water tank 2A to add
Pipe line 21, steam adjust pipeline 22, pressure controller 23, relief valve 24, hot water temperature's meter 25 and heat hydraulic pressure table 26, hot water
Recovery pipe 27 and hot-water check valve 28, wherein circulation heating tube 21 passes through water circulating pump 211 by heated sealed water tank 2A
Heated sealed water tank 2A is returned to heating circuit heat exchanger 212, the hot fluid of heating circuit heat exchanger 212 is from boiler
Steam；Steam adjusts pipeline 22 and steam is sent into heated sealed water tank 2A by pressure reducing valve 221 and steam ball valve 222；Hot water
Recovery pipe 27 is recycled from heated sealed water tank 2A to water tank 6, and Recovery of the hot water ball valve is provided on Recovery of the hot water pipeline 27
271.Wherein, circulation heating tube 21 is using the water in heat exchange method heating heated sealed water tank 2A, and making it is more than 100 DEG C, symbol
Test temperature is closed, and water temperature is measured by hot water temperature's meter 25.Due to being heated sealed water tank 2A, so steam is needed to adjust
Pipeline 22 assists hot water to enter test pipeline 7.Pressure controller 23 and relief valve 24, which are that pressure inside the tank is excessive in order to prevent, to be caused
Tank body explosion etc. surprisingly occurs and is arranged.Heat hydraulic pressure table 26 is then and above-mentioned steam to be assisted to adjust to monitor pressure inside the tank
The open and close of pipeline 22, pressure controller 23, relief valve 24.Hot-water check valve 28 is in order to when in heated sealed water tank 2A
When pressure is lower than external pressure, hot-water check valve 28 is opened, and the pressure and atmospheric pressure in water tank balance, and is prevented in sealed shape
The heated sealed water tank 2A of state deformation damage due to the negative pressure that wherein medium temperature reduces and outside is formed.
Heated sealed water tank 2A is connected to water tank 6 by test pipeline 7, and water tank 6 is open type water tank；By hot water
On water tank 2 to the direction of water tank 6, tests on pipeline 7 and be disposed with the test test of water pump 71, first ball valve 72, be detected
Table 1, the first thermometer 73, test pressure gauge 74, second are tested ball valve 75, proving flowmeter 3, electric control valve 76, third and are surveyed
Try valve 77, heat exchanger the 78, the 4th test ball valve 79, second temperature meter 710, commutator 711, third thermometer 712, weigh hold
Device 4 and the 5th test ball valve 713.The cooling water outlet pipe road 8 of heat exchanger 78 is connected to cooling pond with cooling water inlet pipe road 9
10, cooling flow meter 91 and water circulating pump 92 are provided on cooling water inlet pipe road 9, hot water needs before flowing to commutator 711
The state being not easy to evaporate under 1 atmospheric pressure is cooled the temperature to, is used in case Static mass method weighs, by cooling pond 10
Cold water lowers the hot water temperature in heat exchanger 78.One pipeline of commutator 711 passes through weighing container 4, weighing container 4
Bottom is equipped with valve 713, and the water in weighing container 4 can be emitted into water tank 6 by opening valve 713, and another pipeline is straight
Water tank 6 is passed in succession；Weighing container 4 is placed on electronic scale 5.It further include the first recovery pipe 11 and the second recovery pipe
12, wherein the first recovery pipe 11 is recycled from water tank 6 to hot water water tank 2, and according to direction of recession, the first recovery pipe
Recovered water pump 111 and recycling check-valves 112 are disposed on 11；Second recovery pipe 12 is from test pipeline 7 to hot water water storage
Tank 2 recycles, and recycling ball valve 121 is provided in the second recovery pipe 12.
It further include controller (not shown), controller control connection pressure controller 23, relief valve 24, hot water non-return
Valve 28, pressure reducing valve 221, steam ball valve 222, Recovery of the hot water ball valve 271, test water pump 71, first are tested ball valve 72, second and are tested
Ball valve 75, electric control valve 76, third test ball valve the 77, the 4th test ball valve the 79, the 5th test ball valve 713, water circulating pump 92,
Recovered water pump 111, recycling check-valves 112, recycling ball valve 121.The setting of controller is in order to facilitate each valve and water pump
It opens and closes.
Wherein, to guarantee safety, pressure controller 23 is arranged in the present embodiment 1 on heated sealed water tank 2A, in order to drop
The expansion of low heating process water generates excess pressure to heated sealed water tank 2A.Working method：Set pressure protection bound
It is worth (P1, P2), pressure controller 23 is by pressure signal real-time Transmission to controller, and when pressure is more than P2, controller output is controlled
Signal processed opens Recovery of the hot water ball valve 271, and the water in heated sealed water tank 2A is emitted into water tank 6, and pressure is less than P1
When, then control the closing of Recovery of the hot water ball valve 271.
Static mass method workflow：Commutator 711 is switched to the state for being directly entered water tank 6, opens test water
Pump the 71, first test ball valve 72, second tests ball valve 75, electric control valve 76, third test ball valve the 77, the 4th and tests ball valve
79, five test ball valve 713, makes the value of proving flowmeter 3 reach the flow used.After the completion of above-mentioned work, 5 He of electronic scale is recorded
The initial value of checklist 1, switching commutator 711 make water enter weighing container 4, after reaching a certain amount of, then commutator 711 are switched to
Be directly entered the state of water tank 6, and record simultaneously electronic scale 5 and checklist 1 numerical value and each temperature count value, through number
According to processing, the relevant parameter of you can get it checklist.
Method of standard table workflow：It closes third and tests ball valve 77, open test water pump 71, first and test ball valve 72, the
Two test ball valves 75, electric control valve 76, third test ball valve the 77, the 4th test ball valve 79, five and test ball valve 713, adjustment electricity
Dynamic regulating valve 76, when reaching the flow of needs, can be detected, and the numerical value of proving flowmeter 3 and checklist 1 are carried out pair
Than.
Embodiment 2
As shown in Fig. 2, being the high-temp liquid flow standard device that the present embodiment 2 provides, hot water water tank 2 is open heat
Open water inlet 29 and hot water temperature's meter 25 are provided on water water tank 2B, open hot water water tank 2B.In use, by temperature
Hot water greater than 100 DEG C is introduced directly into open hot water water tank 2B.In addition to 2 structure of hot water water tank is not identical, remaining
It is all same as Example 1, it no longer illustrates, detailed in Example 1.
Above embodiment of the present invention is not intended to limit the scope of the present invention..
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (4)
1. a kind of high-temp liquid flow standard device, which is characterized in that including checklist (1), hot water water tank (2), normal stream
Meter (3), weighing container (4), electronic scale (5) and water tank (6), wherein
The checklist (1) is the flow measurement utensil tested, and the hot water water tank (2) is to store 100 DEG C or more
Hot water, and the water tank (6) is connected to by test pipeline (7)；On direction by hot water water tank (2) to water tank (6), institute
It states and is disposed with test water pump (71), the first test ball valve (72), checklist (1), the first thermometer in test pipeline (7)
(73), pressure gauge (74), the second test ball valve (75), proving flowmeter (3), electric control valve (76), third test ball are tested
Valve (77), heat exchanger (78), the 4th test ball valve (79), second temperature meter (710), commutator (711), third thermometer
(712), weighing container (4) and the 5th test ball valve (713)；The cooling water outlet pipe road (8) of the heat exchanger (78) and cooling
Water inlet pipeline (9) is connected to cooling pond (10), be provided on the cooling water inlet pipe road (9) cooling flow meter (91) and
Water circulating pump (92)；
One pipeline of the commutator (711) is connected to the water tank (6) by the weighing container (4), another pipe
Road is directly connected to the water tank (6)；The weighing container (4) is placed on the electronic scale (5)；
It further include the first recovery pipe (11) and the second recovery pipe (12), wherein first recovery pipe (11) is by described
Water tank (6) is recycled to the hot water water tank (2), and according to direction of recession, is successively set on first recovery pipe (11)
It is equipped with recovered water pump (111) and recycling check-valves (112)；Second recovery pipe (12) is from the test pipeline (7) to institute
Hot water water tank (2) recycling is stated, and is provided with recycling ball valve (121) in second recovery pipe (12).
2. high-temp liquid flow standard device according to claim 1, which is characterized in that the hot water water tank (2) is
Heated sealed water tank (2A) is provided with and communicated with circulation heating tube (21), steam tune on the heated sealed water tank (2A)
Save pipeline (22), pressure controller (23), relief valve (24), hot water temperature's meter (25) and heat hydraulic pressure table (26), Recovery of the hot water
Pipeline (27) and hot-water check valve (28), wherein
The circulation heating tube (21) passes through water circulating pump (211) and heating circuit heat exchanger by heated sealed water tank (2A)
(212) heated sealed water tank (2A) is returned to, the hot fluid of the heating circuit heat exchanger (212) is the steam from boiler；
The steam adjusts pipeline (22) and steam is sent into the heated sealed water storage by pressure reducing valve (221) and steam ball valve (222)
Tank (2A)；The Recovery of the hot water pipeline (27) is recycled from the heated sealed water tank (2A) to the water tank (6), the heat
Recovery of the hot water ball valve (271) are provided in water recovery culvert (27).
3. high-temp liquid flow standard device according to claim 1, which is characterized in that the hot water water tank (2) is
It opens hot water water tank (2B), open water inlet (29) and hot water temperature's meter is provided on the open hot water water tank (2B)
(25)。
4. high-temp liquid flow standard device according to claim 2, which is characterized in that it further include controller, the control
Device control processed connects the pressure controller (23), relief valve (24), hot-water check valve (28), pressure reducing valve (221), steam ball valve
(222), Recovery of the hot water ball valve (271), test water pump (71), the first test ball valve (72), the second test ball valve (75), electric adjustable
It saves valve (76), third test ball valve (77), the 4th test ball valve (79), the 5th test ball valve (713), water circulating pump (92), return
Receive water pump (111), recycling check-valves (112), recycling ball valve (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146407.XA CN108917891B (en) | 2018-09-27 | 2018-09-27 | High-temperature liquid flow standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146407.XA CN108917891B (en) | 2018-09-27 | 2018-09-27 | High-temperature liquid flow standard device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917891A true CN108917891A (en) | 2018-11-30 |
| CN108917891B CN108917891B (en) | 2024-02-09 |
Family
ID=64409439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811146407.XA Active CN108917891B (en) | 2018-09-27 | 2018-09-27 | High-temperature liquid flow standard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108917891B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736523A (en) * | 2019-09-20 | 2020-01-31 | 成都秦川物联网科技股份有限公司 | High-low temperature performance test testing device for membrane type gas meter |
| CN110954193A (en) * | 2019-12-27 | 2020-04-03 | 山东省计量科学研究院 | Variable-temperature and variable-flow flowmeter durability test device |
| EP4043843A1 (en) * | 2021-02-16 | 2022-08-17 | Belimo Holding AG | Test stand for liquid flow meters |
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| KR20110122501A (en) * | 2010-05-04 | 2011-11-10 | 신화에이치 주식회사 | A hot water circulation device using the vapor pressure |
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| CN104458063A (en) * | 2014-12-12 | 2015-03-25 | 合肥瑞纳表计有限公司 | Energy-saving flow calibration device and method of heat meter |
| CN207280638U (en) * | 2017-09-28 | 2018-04-27 | 陕西省计量科学研究院 | A kind of mass method calorimeter automatic calibrator based on M-bus interfaces |
| CN208984179U (en) * | 2018-09-27 | 2019-06-14 | 山东省计量科学研究院 | A kind of high-temp liquid flow standard device |
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| KR20110122501A (en) * | 2010-05-04 | 2011-11-10 | 신화에이치 주식회사 | A hot water circulation device using the vapor pressure |
| CN203132656U (en) * | 2013-04-01 | 2013-08-14 | 烟台市计量所 | Device for calibrating steam flowmeter by using condensation weighing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110736523A (en) * | 2019-09-20 | 2020-01-31 | 成都秦川物联网科技股份有限公司 | High-low temperature performance test testing device for membrane type gas meter |
| CN110736523B (en) * | 2019-09-20 | 2020-12-01 | 成都秦川物联网科技股份有限公司 | High-low temperature performance test testing device for membrane type gas meter |
| CN110954193A (en) * | 2019-12-27 | 2020-04-03 | 山东省计量科学研究院 | Variable-temperature and variable-flow flowmeter durability test device |
| CN110954193B (en) * | 2019-12-27 | 2024-05-17 | 山东省计量科学研究院 | Flow meter durability test device capable of changing temperature and flow rate |
| EP4043843A1 (en) * | 2021-02-16 | 2022-08-17 | Belimo Holding AG | Test stand for liquid flow meters |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108917891B (en) | 2024-02-09 |
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