CN210441958U - Temperature and flow impact test device - Google Patents
Temperature and flow impact test device Download PDFInfo
- Publication number
- CN210441958U CN210441958U CN201921700410.1U CN201921700410U CN210441958U CN 210441958 U CN210441958 U CN 210441958U CN 201921700410 U CN201921700410 U CN 201921700410U CN 210441958 U CN210441958 U CN 210441958U
- Authority
- CN
- China
- Prior art keywords
- flow
- water pump
- variable frequency
- temperature
- valve
- 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
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a temperature and flow impact test device. The utility model discloses a cold water tank, hot water tank, frequency conversion water pump, water pump inlet valve, water pump outlet valve, cold water pipeline water intaking valve, hot water pipeline water intaking valve, the binding clasp, the examined table, step motor valve, standard flowmeter and flow control valve, cold water pipeline outlet valve, hot water pipeline outlet valve. The flow is driven by the water pump, the stepping motor valve realizes flow interruption or synchronous regulation of the flow regulating valve and the water pump frequency, the standard flowmeter realizes flow monitoring, and the flow impact test is completed. And (4) through valve control, enabling the fluid in the cold water tank and the fluid in the hot water tank to alternately flow through the detected flow meter, and completing the temperature impact test. The utility model discloses an to the optimal design of device structure, realized that the temperature to the examined table strikes and flow impact test, has solved the experimental technological problem in flow measurement instrument life-span.
Description
Technical Field
The utility model relates to a test device, concretely relates to temperature and flow impact test device.
Background
The civil flow metering instrument mainly comprises a cold water meter, a hot water meter and a heat meter, and is closely related to civil engineering and trade metering. The civil flow metering instrument covers all nodes of hydraulic engineering and trade settlement. The calorimeter is used as one kind of civil metering instrument, is mainly used for metering heat supply in winter in the north, relates to thousands of households and nationwide, and is key to the success and failure of the reform of the city and town heat supply system of 'household metering and settlement according to the calorimeter' carried out by China. The purpose of promoting the reform of the heat supply system is to promote people to cultivate the consciousness of saving energy by changing the settlement mode of the heating cost of residents, thereby achieving the aim of energy conservation and emission reduction in the whole society. The reform is especially necessary under the background of global energy shortage and serious atmospheric pollution in China.
The accuracy and reliability of the civil flow metering instrument are closely related to the life of people and the national energy-saving and emission-reducing policy, and how to effectively manage the civil flow metering instrument and ensure the reliable service life of the civil flow metering instrument is always a difficult point which troubles enterprises. With the increasing importance of government departments on the treatment of water resources, each unit also puts higher requirements on the service life reliability and stability of the civil flow metering instrument. Utilize the accelerated life-span device in laboratory, discovery problem solution problem in design and research and development process, it is this the utility model provides a research and development temperature and flow impact test device's basic starting point.
Disclosure of Invention
The utility model discloses to prior art's not enough, provided a temperature and flow impact test device.
The utility model provides a technical scheme that technical problem took does:
the utility model discloses a cold water source, hot water source and respectively with cold water source, hot water source looks UNICOM's test bench.
The cold water source comprises a cold water tank, a first variable frequency water pump and a second variable frequency water pump, the first variable frequency water pump and the second variable frequency water pump are arranged at the water outlet of the cold water tank in parallel, and cold water is guided into the test bench through the first variable frequency water pump or the second variable frequency water pump and flows back to the cold water tank after passing through the test bench.
The hot water source comprises a hot water tank, a third variable frequency water pump and a fourth variable frequency water pump, the third variable frequency water pump and the fourth variable frequency water pump are arranged at the water outlet of the hot water tank in parallel, and hot water is guided into the test bench through the third variable frequency water pump or the fourth variable frequency water pump and flows back to the hot water tank after passing through the test bench.
The test bed comprises a clamp, a stepping motor valve and two groups of flow regulating devices, wherein a to-be-detected meter is arranged between the clamp and the stepping motor valve, and the clamp is used for forming a closed working loop when the to-be-detected meter is arranged; the stepping motor valve is mainly used for switching on and off the flow, the stepping motor is used for realizing the controllability of the opening and closing action time of the valve, and water flowing through the water body passing through the detected meter returns to the cold water tank or the hot water tank through one group of flow adjusting devices.
Furthermore, the cold water tank adopts a heat insulation structure, comprises a refrigerating unit and has a cooling function.
Furthermore, the hot water tank adopts a double-layer heat preservation structure, comprises an electric heating system and has a temperature rise function.
Furthermore, the power of the first variable-frequency water pump is 2.2kw, and the maximum flow is 8m3H; the power of the second variable frequency water pump is 11kw, and the maximum flow is 50m3H; when the caliber of the detected meter is DN15-DN25, a first variable frequency water pump is used, and when the caliber of the detected meter is DN32-DN50, a second variable frequency water pump is used.
Furthermore, the power of the third variable frequency water pump is 2.2kw, and the maximum flow is 8m3H; the power of the fourth variable frequency water pump is 11kw, and the maximum flow is 50m3H; and when the caliber of the detected meter is DN15-DN25, the third variable frequency water pump is used, and when the caliber of the detected meter is DN32-DN50, the fourth variable frequency water pump is used.
Further, any one of the two sets of flow regulating devices comprises a standard flow meter and a flow regulating valve.
Furthermore, one of the two sets of flow regulating devices has a caliber of DN5, and the other set has a caliber of DN 50.
The utility model has the advantages that:
1. through document inquiry and research, the existing civil flowmeter durability test device can only realize partial functions, and a device covering the comprehensive requirements of a cold water meter, a hot water meter and a heat meter does not exist. The utility model discloses an optimization design to the device structure, including step motor valve, flow control valve and water pump frequency conversion regulation's synthesis, the integration of having realized temperature impact test and flow impact test function such as cold water hot water tank independent design has overcome current test device's limitation, has solved the experimental technological problem of flow measurement instrument life-span.
2. The flow impact test is realized through the stepping motor valve and the frequency conversion synchronous control of the flow regulating valve and the water pump, the detected meter is arranged on the workbench position in the test process, the target flow is monitored and fed back through the standard flow meter at the downstream of the regulating valve, the deviation of the actual flow from the target flow is effectively avoided, and the reliability of the flow impact test is obviously improved.
3. And the temperature impact test is completed by controlling the switching of the valves, and enabling the fluid in the cold water tank and the fluid in the hot water tank to alternately flow through the detected flow meter. The temperature control adopts the refrigerating and electric heating modes of the cold water unit, the double-layer heat insulation and preservation of the water tank and the test pipeline are carried out, the large temperature fluctuation degree in the test process is effectively avoided, and the reliability of the temperature impact test is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from a in fig. 1.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the present embodiment includes a cold water tank 21, a hot water tank 22, a variable frequency water pump 2/5/15/18, a water pump inlet valve 1/4/14/17, a water pump outlet valve 3/6/16/19, a cold water line inlet valve 7, a hot water line inlet valve 20, a clamp 8, a to-be-detected meter 23, a stepper motor valve 9, a flow rate adjusting device 10/11, a cold water line outlet valve 12, and a hot water line outlet valve 13.
The cold water tank 21 is of a double-layer heat insulation structure and comprises a refrigerating unit with a cooling function; the hot water tank 22 is a double-layer heat preservation structure and comprises an electric heating system with a temperature rising function; the four variable-frequency water pumps 2/5/15/18 are respectively composed of two cold water pumps 2 (2.2 kw, 8 m) with different powers3/h）/5（11kw、50m3H) and two hot water pumps 15 (2.2 kw, 8 m)3/h）/18（11kw、50m3/h), a variable frequency water pump 2/15 is used when the caliber of the detected meter is DN15-DN25, and a variable frequency water pump 5/18 is used when the caliber of the detected meter is DN32-DN 50; the clamp is mainly used for forming a closed working loop when the checked meter is installed; the stepping motor valve is mainly used for switching on and off flow, and the stepping motor is used for realizing the controllable valve switching action time; the flow regulating device 10/11 comprises a standard flowmeter and a flow regulating valve, which are respectively composed of DN5 and DN50, correspond to different flow regulation, and when the flow is less than or equal to 1m3When the flow rate is more than 1m, the fluid flows through the flow rate adjusting device 103At/h the fluid flows through the flow regulating device 11.
The embodiment can realize the discontinuous flow test by controlling the stepping motor valve; the flow impact test is realized by the frequency conversion of the water pump and the synchronous adjustment of the flow adjusting valve, and the temperature impact test is realized by the independent water supply of the cold water tank and the hot water tank. The specific test process is as follows:
item 1, water meter 100000 break flow endurance tests.
Assuming that the detected meter is a DN25 cold water meter, the fluid in the cold water tank is driven by the variable frequency water pump 2 to reach the inlet valve 7 of the cold water pipeline, and flows through the detected meter 23, the stepping motor valve 9 realizes flow interruption, the flow regulating device 11 realizes control and feedback of the test flow by combining with the variable frequency regulation of the water pump, and the 100000 interrupted flow tests are completed. The main process is as follows: from zero to test flowQ 3Stage (A)Q 3For the common flow of the water meter, the national metrological verification regulation JJJG 162-2009 has defined the water meter, DN25 cold water meterQ 3Typically 6.3m3H) duration of start-up0.15Q 3(minimum 1 s); constant flow testQ 3Stage, operating time is 15s under test flow; from the test flowQ 3To zero phase, stop duration 0.15Q 3(minimum 1 s); zero flow phase, pause duration 15 s. The above 4 phases constitute a complete cycle which needs to run 100000 times in succession. Along with the duration of the test, the water meter can generate heat, so that the water temperature is continuously increased, and the water temperature is controlled to be (10-30) DEG C during the test by the cooling function of the refrigerating unit of the cold water tank.
Item 2, calorimeter 2400h basic durability test.
Assuming that the detected meter is a DN25 calorimeter, the fluid in the hot water tank is driven by the variable frequency water pump 18, reaches the inlet valve 20 of the hot water pipeline, flows through the detected meter 23, selects different standard flow meters and flow regulating valves for flow regulation and feedback according to different test flows, and finishes the 2400h basic durability test. The main process is as follows: the test procedure was carried out for 100 cycles in succession at 3 different flow rates, each cycle lasting 24 h. From 1.5 per cycleq i Start (q i For calorimeter minimum flow, DN25 calorimeterq i Typically 0.07 m3Per, select flow regulating device 10) -increase the flow uniformly to 15minq p （q p For commonly used flow rate of heat meter, DN25 heat meterq p Typically 3.5 m3H, selecting the flow regulating means 11) -inq p After running for 8 hours, the flow is uniformly increased to beq s （q s DN25 calorimeter for maximum flow of calorimeterq s Typically 7 m3H, selecting the flow regulating means 11) -inq s After running for 1h, the flow is uniformly reduced to 15minq p -atq p After running for 8h, the flow is uniformly reduced to 1.5 in 15minq i At 1.5q i And running for 6h to complete the test flow change adjustment of one period. Base ofThe requirement of the working water temperature of the durability test is as follows: (θ max -5）~θ max ，θ max The upper limit of the temperature range of the heat meter is generally 95 ℃, so that an electric heating system of a hot water tank is required to heat the heat-insulating material for heat insulation during the test, and the test temperature is stabilized at (90-95) DEG C.
Item 3, 4000 temperature cycle impact tests and 4000 flow cycle impact tests.
The detected object is a heat meter, and when a flow sensor of the detected heat meter is provided with a movable mechanical part, 4000 times of flow impact tests are carried out; and when the flow sensor of the heat meter to be detected has no movable mechanical part, 4000 times of temperature shock tests are carried out. The flow impact test comprises the following specific processes: from 0 to 1min for change of flow loadq s(maximum flow rate), maintenanceq sThe flow rate is 1.5min, and the flow rate is controlled within 1minq sAnd when the temperature reaches 0 ℃, keeping the flow rate at 0 for 1.5min for one time, and performing impact tests for 4000 times, wherein the water temperature is controlled to be (80-85) DEG C in the test process. Each cycle period of the temperature impact test can be divided into 3 stages, wherein the high-temperature stage is when the water temperature is (80-85) DEG C, the low-temperature stage is when the water temperature is (15-20) DEG C, the transition stage is between the high-temperature stage and the low-temperature stage, the time ⧍t of each transition stage is less than 60s, and each low-temperature process and each high-temperature process lasts for 2.5min (including the transition stage). The specific process of the temperature impact test is as follows: the temperature load changes from (15-20) DEG C to (80-85) DEG C within 1min, the high temperature stage is kept for 1.5min, then from (80-85) DEG C to (15-20) DEG C within 1min, the low temperature stage is kept for 1.5min once, 4000 times of temperature impact are carried out, and the flow is kept to be (15-85) DEG C within the test processq p. And through valve control, the fluid in the cold water tank and the fluid in the hot water tank alternately flow through the detected flow meter, so that the temperature impact test is realized.
Claims (7)
1. Temperature and flow impact test device, its characterized in that: comprises a cold water source, a hot water source and a test bed which is respectively communicated with the cold water source and the hot water source;
the cold water source comprises a cold water tank, a first variable frequency water pump and a second variable frequency water pump, the first variable frequency water pump and the second variable frequency water pump are arranged at the water outlet of the cold water tank in parallel, and cold water is guided into the test bed through the first variable frequency water pump or the second variable frequency water pump and flows back to the cold water tank after passing through the test bed;
the hot water source comprises a hot water tank, a third variable frequency water pump and a fourth variable frequency water pump, the third variable frequency water pump and the fourth variable frequency water pump are arranged at the water outlet of the hot water tank in parallel, and the hot water is guided into the test bed through the third variable frequency water pump or the fourth variable frequency water pump and flows back to the hot water tank after passing through the test bed;
the test bed comprises a clamp, a stepping motor valve and two groups of flow regulating devices, wherein a to-be-detected meter is arranged between the clamp and the stepping motor valve, and the clamp is used for forming a closed working loop when the to-be-detected meter is arranged; the stepping motor valve is mainly used for switching on and off the flow, the stepping motor is used for realizing the controllability of the opening and closing action time of the valve, and water flowing through the water body passing through the detected meter returns to the cold water tank or the hot water tank through one group of flow adjusting devices.
2. The temperature and flow impact test device of claim 1, wherein: the cold water tank adopts a heat insulation structure, comprises a refrigerating unit and has a cooling function.
3. The temperature and flow impact test device of claim 1, wherein: the hot water tank adopts double-deck insulation construction, contains electric heating system, possesses the intensification function.
4. The temperature and flow impact test device of any one of claims 1 to 3, wherein: the power of the first variable frequency water pump is 2.2kw, and the maximum flow is 8m3H; the power of the second variable frequency water pump is 11kw, and the maximum flow is 50m3H; when the caliber of the detected meter is DN15-DN25, a first variable frequency water pump is used, and when the caliber of the detected meter is DN32-DN50, a second variable frequency water pump is used.
5. The temperature and flow impact test device of any one of claims 1 to 3, wherein: the power of the third variable frequency water pump is 2.2kw, and the maximum flow is 8m3H; the power of the fourth variable frequency water pump is 11kw, and the maximum flow is 50m3H; and when the caliber of the detected meter is DN15-DN25, the third variable frequency water pump is used, and when the caliber of the detected meter is DN32-DN50, the fourth variable frequency water pump is used.
6. The temperature and flow impact test device of claim 1, wherein: and any one of the two groups of flow regulating devices comprises a standard flow meter and a flow regulating valve.
7. The temperature and flow impact test device of claim 6, wherein: one of the two sets of flow regulating devices has a caliber of DN5, and the other set has a caliber of DN 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700410.1U CN210441958U (en) | 2019-10-12 | 2019-10-12 | Temperature and flow impact test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700410.1U CN210441958U (en) | 2019-10-12 | 2019-10-12 | Temperature and flow impact test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210441958U true CN210441958U (en) | 2020-05-01 |
Family
ID=70411391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921700410.1U Expired - Fee Related CN210441958U (en) | 2019-10-12 | 2019-10-12 | Temperature and flow impact test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210441958U (en) |
-
2019
- 2019-10-12 CN CN201921700410.1U patent/CN210441958U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103363585B (en) | A kind of downtown areas central heating system control method | |
| CN104501421B (en) | A kind of control method of frequency conversion two-stage compression heat pump water heater | |
| AU2010358473B2 (en) | Method for controlling a parallel operation of a multi-water heater | |
| CN104934619A (en) | Thermal management system of water-cooling proton exchange membrane fuel cell and control method of thermal management system | |
| CN101907043A (en) | High-frequency combustion instability coverall process simulation test automatic regulating system and method | |
| CN102033079A (en) | Instrument and method for testing stratum in-situ thermal property of ground source heat pump and heat exchange quantity of buried pipe | |
| MY153993A (en) | Operation method of synthesis gas reformer in gtl plant | |
| CN108550877B (en) | Distributed cold start device, system and method for fuel cell stack | |
| CN210441958U (en) | Temperature and flow impact test device | |
| AU2011342551B2 (en) | Cooling system | |
| CN201885399U (en) | Direct-heating controller for heat pump water supply system | |
| CN202189027U (en) | Concrete thermal diffusion rate measurement device | |
| CN102418937A (en) | Combustion air and natural gas linear proportion control system for ceramic kiln | |
| CN201628630U (en) | Water source heat pump test bed | |
| WO2023197596A1 (en) | System and method for performing seawater desalination by using heat supply backpressure steam turbine generator unit | |
| CN102562259A (en) | Air inlet temperature control system of engine | |
| CN103726892B (en) | A kind of turbine circulation water residual heat using device | |
| CN202215934U (en) | Steam vaporization device | |
| CN202012982U (en) | Life hot water system with multiple heat sources which are complementary | |
| CN109340902A (en) | A kind of adjustment type water stream injection pump is for heat balance system and its balance method | |
| CN201628386U (en) | Heating device of spinning case body | |
| CN204988760U (en) | Energy -saving steam jet refrigeration unit testing arrangement | |
| CN103472869A (en) | Oil product storage tank constant-temperature energy-saving automatic control method and device | |
| CN203502856U (en) | Constant-temperature and energy-saving automatic control device of oil storage tank | |
| CN209570361U (en) | A kind of Performance Test System of gas heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200501 Termination date: 20201012 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |