CN108151918A - A kind of calorimeter endurance test apparatus and its test method - Google Patents
A kind of calorimeter endurance test apparatus and its test method Download PDFInfo
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- CN108151918A CN108151918A CN201810209058.5A CN201810209058A CN108151918A CN 108151918 A CN108151918 A CN 108151918A CN 201810209058 A CN201810209058 A CN 201810209058A CN 108151918 A CN108151918 A CN 108151918A
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- 238000005086 pumping Methods 0.000 claims description 6
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention provides a kind of calorimeter endurance test apparatus and its test method, and the calorimeter endurance test apparatus includes constant-temperature water heating tank, constant temperature cold water storage cistern, experiment pipeline and the flow adjustment pipe being composed in series by flow control valve and electromagnetic flowmeter；Wherein, constant-temperature water heating tank is connected by the first outlet pipeline with testing the entrance of pipeline, and is pumped into hot water from the first variable frequency pump to experiment pipeline；The outlet of experiment pipeline is connected by two flow adjustment pipes in parallel with constant-temperature water heating tank respectively, to form hot water test systemic circulation pipeline；The first thermometer, first pressure transmitter are set in the inlet of experiment pipeline, in exit setting second temperature meter, the second pressure transmitter of experiment pipeline.The present invention is supplied using individual high-temperature water and water at low temperature, and provides four circulation lines of systemic circulation and partial circulating, and to meet the requirement of different durability tests, valve auto-alternate is not only energy saving but also protect detection instrument.
Description
Technical Field
The invention relates to a calorimeter calibrating device, in particular to a calorimeter durability test device and a test method thereof.
Background
The adoption of heat meters for household metering of heat supply is an important link for heat supply reformation. In China, the actual use of heat meters for household metering has been for more than ten years from the beginning of trial to the present, and the installation and use quantity of the heat meters is huge. From the daily detection statistical condition, the first inspection qualified rate of the heat meter is relatively stable, but from the information fed back in use, the problem of the heat meter product quality is mainly reflected in the aspect of long-term reliability.
The durability of the heat meter directly influences the service life of the heat meter, and most heat meter production enterprises mainly test the durability of the heat meter according to European standards because China has no corresponding test standards. However, when 4000 times of temperature cycle impact tests are carried out in the conventional calorimeter durability test device, problems of accuracy reduction, even failure and the like may occur, and the accuracy of a test structure is influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a heat meter durability test device and a test method thereof, so as to overcome the defects in the prior art.
In order to achieve the aim, the invention provides a heat meter durability test device which comprises a constant-temperature hot water tank, a constant-temperature cold water tank, a test pipeline and a flow regulating pipeline, wherein the flow regulating pipeline is formed by connecting a flow regulating valve and an electromagnetic flowmeter in series; the constant-temperature hot water tank is communicated with an inlet of the test pipeline through a first water outlet pipeline, and hot water is pumped into the test pipeline through the first variable-frequency water pump; the constant-temperature cold water tank is communicated with an inlet of the test pipeline through a second water outlet pipeline, and cold water is pumped into the test pipeline through a second variable-frequency water pump; the outlet of the test pipeline is respectively communicated with the constant-temperature hot water tank and the constant-temperature cold water tank through two flow regulating pipelines connected in parallel so as to form a hot water test large circulation pipeline and a cold test large circulation pipeline; a first thermometer and a first pressure transmitter are arranged at an inlet of the test pipeline, and a second thermometer and a second pressure transmitter are arranged at an outlet of the test pipeline; the test pipeline consists of a meter group A to be tested and a meter group B to be tested which are connected in parallel, the constant-temperature hot water tank is communicated with an inlet of the meter group A to be tested through a third water outlet pipeline, and hot water is pumped into the meter group A to be tested through a third variable-frequency water pump; the outlet of the tested meter group A is communicated with the constant-temperature hot water tank through one flow regulating pipeline to form a small circulation pipeline for a hot water test; a third thermometer and a third pressure transmitter are arranged at the inlet of the meter group A to be tested, and a fourth thermometer and a fourth pressure transmitter are arranged at the outlet of the meter group A to be tested; the constant-temperature cold water tank is communicated with an inlet of the measured meter group B through a fourth water outlet pipeline, and cold water is pumped into the measured meter group B through a fourth variable-frequency water pump; the outlet of the measured meter group B is communicated with the constant-temperature cold water tank through the flow regulating pipeline to form a cold water test small circulation pipeline; and a fifth thermometer and a fifth pressure transmitter are arranged at the inlet of the B measured meter group, and a sixth thermometer and a sixth pressure transmitter are arranged at the inlet of the B measured meter group.
As a further description of the durability test device of the heat meter, preferably, the first water outlet pipeline branches off a hot water self-circulation pipeline to be communicated to the constant-temperature hot water tank, and the self-circulation flow rate of the constant-temperature hot water tank is controlled by a flow regulating valve; and a cold water self-circulation pipeline is branched from the second water outlet pipeline and communicated to the constant-temperature cold water tank, and the self-circulation flow rate of the constant-temperature cold water tank is controlled by a flow regulating valve.
As a further explanation of the durability test device of the heat meter according to the present invention, preferably, the constant temperature hot water tank is provided with a hot water replenishing pipeline, a heater is provided on the hot water replenishing pipeline, and the replenishing of hot water is controlled by a second switching valve; the constant-temperature cold water tank is provided with a cold water replenishing pipeline, and the hot water replenishing pipeline controls replenishing cold water through a second switch valve.
As a further explanation of the calorimeter durability test device of the present invention, it is preferable that a seventh thermometer and a first level gauge are provided in the constant temperature hot water tank, the seventh thermometer measures the temperature of hot water in the constant temperature hot water tank, the heater heats the replenished hot water to a required temperature according to the temperature value of the seventh thermometer, the first level gauge measures the level change of the hot water in the constant temperature hot water tank, and the second switch valve replenishes the hot water according to the hot water amount of the first level gauge; an eighth thermometer and a second liquid level meter are arranged in the constant-temperature cold water tank, the second liquid level meter measures the liquid level change of cold water in the constant-temperature hot water tank, and a second switch valve supplements the cold water according to the cold water quantity of the second liquid level meter.
As a further explanation of the durability test apparatus for a calorimeter according to the present invention, it is preferable that the length of the front end straight tube section of each of the meters to be tested in the meter group a and the meter group B is 10 times the caliber of the meter to be tested, and the length of the rear end straight tube section is 5 times the caliber of the meter to be tested.
As a further description of the durability test device for the heat meter, preferably, the constant temperature hot water tank adopts a sealed water tank, and the first water outlet pipeline, the third water outlet pipeline and the test pipeline are paved with heat preservation layers to prevent evaporation of a heat carrying medium and loss of medium temperature.
The invention also provides a test method using the heat meter durability test device, which comprises the following steps:
step 1)2400 hr durability test
Closing the second variable frequency water pump, the third variable frequency water pump and the fourth variable frequency water pump, presetting the opening degree of a flow regulating valve in the two flow regulating pipelines connected in parallel, starting the first variable frequency water pump, and circularly pumping hot water in a constant temperature hot water tank into a test pipeline for a 2400-hour durability test, wherein the hot water temperature is 80-85 ℃; or
Step 2)1000 hours additional durability test
Closing the second variable frequency water pump, the third variable frequency water pump and the fourth variable frequency water pump, and presetting the opening degree of a flow regulating valve in the two parallel flow regulating pipelines as the maximum flow qsStarting a first variable frequency water pump and circularly pumping hot water in a constant temperature hot water tank into a test pipeline, and carrying out a durability test at a hot water temperature of 80-85 ℃ in the first 500 hours; supplementing 90-95 ℃ hot water into the constant-temperature hot water tank for 500 hours later to perform a durability test; or
Step 3)4000 times of temperature cycle impact test
Closing the third variable frequency water pump and the fourth variable frequency water pump, and presetting the opening degree of a flow regulating valve in the two parallel flow regulating pipelines as a common flow qpAnd alternately starting the first variable-frequency water pump and the second variable-frequency water pump so that the hot water pump in the constant-temperature hot water tank and the cold water pump in the constant-temperature cold water tank are alternately pumped into the test pipelines, and in the circulation process of one water tank, the other water tank performs self circulation at the same flow rate, wherein the hot water temperature is 80-85 ℃, and the cold water temperature is 15-20 ℃.
As a further description of the testing method of the present invention, preferably, the flow regulating valves in the two parallel flow regulating pipelines adopt a switching manner to avoid flow impact caused by full opening and full closing of the valves.
As a further explanation of the test method according to the present invention, it is preferable that the 2400-hour durability test in the step 1) is performed at a flow rate of 1.5qiInitially, it took 15min to increase the flow uniformly to qpAt q ispAfter running for 8 hours, the flow is uniformly increased to q within 15minsAt q issAfter running for 1h, the flow is uniformly reduced to q within 15minpAt q ispAfter running for 8 hours, the flow is uniformly reduced to 1.5qi in 15min, and the operation is carried out for 6 hours under 1.5qi, so that the flow change of 24 hours in one period is completed.
The invention adopts independent high-temperature water and low-temperature water supply, provides four circulating pipelines of large circulation and small circulation to meet the requirements of different durability tests, and can realize 2400-hour basic durability tests, 500-hour additional durability tests, 4000-time temperature cycle impact tests and 4000-time flow impact tests specified by European standards.
Drawings
Fig. 1 is a schematic structural diagram of a heat meter durability test apparatus according to the present invention.
Detailed Description
To further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solutions of the present invention and are not to limit the present invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a heat meter durability test apparatus according to the present invention; the durability test device for the heat meter comprises a constant-temperature hot water tank 1, a constant-temperature cold water tank 2, a test pipeline 3 and a flow regulating pipeline formed by connecting a flow regulating valve and an electromagnetic flowmeter in series; the constant-temperature hot water tank 1 is communicated with an inlet of the test pipeline 3 through a first water outlet pipeline 11, and hot water is pumped into the test pipeline 3 through a first variable-frequency water pump 13; the constant-temperature cold water tank 2 is communicated with the inlet of the test pipeline 3 through a second water outlet pipeline 21, and cold water is pumped into the test pipeline 3 by a second variable-frequency water pump 23; the outlet of the test pipeline 3 is respectively communicated with the constant-temperature hot water tank 1 and the constant-temperature cold water tank 2 through two flow regulating pipelines connected in parallel to form a hot water test large circulation pipeline and a cold test large circulation pipeline; a first temperature gauge 31 and a first pressure transmitter 32 are provided at the inlet of the test line 3, and a second temperature gauge 33 and a second pressure transmitter 34 are provided at the outlet of the test line 3.
The test pipeline 3 is composed of a tested meter group A35 and a tested meter group B36 which are connected in parallel, preferably, the installation of the tested meters meets the requirements of the tested meters on the trend of front and rear straight pipe sections and pipelines, the length of the front-end straight pipe section of each tested meter in the tested meter group A35 and the tested meter group B36 is 10 times of the caliber of the tested meter, and the length of the rear-end straight pipe section is 5 times of the caliber of the tested meter.
The constant-temperature hot water tank 1 is communicated with an inlet of the meter group A to be tested 35 through a third water outlet pipeline 12, and hot water is pumped into the meter group A to be tested 35 through a third variable-frequency water pump 14; the outlet of the measured meter group A35 is communicated with the constant-temperature hot water tank 1 through one flow regulating pipeline to form a small hot water test circulating pipeline; a third thermometer 351 and a third pressure transmitter 352 are arranged at the inlet of the A measured meter group 35, and a fourth thermometer 353 and a fourth pressure transmitter 354 are arranged at the outlet of the A measured meter group 35.
The constant-temperature cold water tank 2 is communicated with an inlet of the B measured meter group 36 through a fourth water outlet pipeline 22, and cold water is pumped into the B measured meter group 36 through a fourth variable-frequency water pump 24; the outlet of the measured meter group B36 is communicated with the constant-temperature cold water tank 2 through one flow regulating pipeline to form a cold water test small circulation pipeline; a fifth thermometer 361 and a fifth pressure transmitter 362 are arranged at the inlet of the B measured meter group 36, and a sixth thermometer 363 and a sixth pressure transmitter 364 are arranged at the inlet of the B measured meter group 36.
The electromagnetic flowmeter and the flow regulating valve are arranged at the downstream of a test pipeline, namely the outlet of the test pipeline 3 and the outlets of the A measured meter group 35 and the B measured meter group 36 are provided with flow regulating pipelines.
The thermometer for measuring the water temperature of the pipeline has the measuring range of (0-100) DEG C, the accuracy of 0.5 ℃ and the display resolution of 0.1 ℃, is respectively provided with temperature collecting points at the inlet and the outlet of the test pipeline 3 and the water tank, and is also provided with the inlet and the outlet of the measured meter group 35 and the measured meter group 36 of the branch test pipeline A and the branch test pipeline B.
The pressure transmitter for measuring the pressure of the test pipeline is used for measuring the pressure of the test pipeline, the measuring range is (0-1) MPa, the accuracy grade is 0.5 grade, pressure collecting points are respectively arranged at an inlet and an outlet of the test pipeline 3, pressure measuring points are respectively arranged before and behind a measured meter, the pressure can be adjusted, and the pressure before and behind the measured meter is ensured not to exceed 1.0MPa and not lower than 0.1MPa, and the inlets and the outlets of a measured meter group 35 and a measured meter group 36 of a branch test pipeline A and a branch test pipeline B are also arranged.
Preferably, a hot water self-circulation pipeline 15 branched from the first water outlet pipeline 11 is communicated to the constant-temperature hot water tank 1, and the self-circulation flow rate of the constant-temperature hot water tank 1 is controlled by a flow regulating valve; the second water outlet pipeline 21 is branched to form a cold water self-circulation pipeline 25 which is communicated to the constant-temperature cold water tank 2, and the self-circulation flow rate of the constant-temperature cold water tank 2 is controlled by a flow regulating valve. To 4000 temperature shock test, be equipped with 2 groups water pump and water tank self-loopa pipelines, when a set of water pump with the water guide-in test pipeline in the low temperature (or high temperature) water tank, another group water pump makes the water in the high temperature (or low temperature) water tank be in from the circulation state, the purpose is when two stages switch, avoids taking place the abrupt change of velocity of flow, makes the process of switching more steady like this, the stability of the equipment operation of reinforcing. The stability of flow and pressure during high-low temperature switching of 4000 temperature impact tests is ensured. The invention adopts independent high-temperature water and low-temperature water supply, one water pump works (hot water or cold water), the other water pump runs at the same flow speed through a bypass pipeline for standby, the undisturbed switching of cold water and hot water for the test is completed by starting the ball valve switching after the working period of 2.5min, and 2400-hour and 4000-time temperature impact and flow impact tests which meet the European standard are simultaneously realized.
The constant temperature hot water tank 1 is provided with a hot water replenishing pipeline 16, the hot water replenishing pipeline 16 is provided with a heater 17, and the replenishing of hot water is controlled through a second switch valve 18; the constant temperature cold water tank 2 is provided with a cold water replenishing pipeline 26, and the hot water replenishing pipeline 26 controls replenishing cold water through a second switch valve 27. A seventh thermometer 161 and a first liquid level meter 162 are arranged in the constant temperature hot water tank 1, the seventh thermometer 161 measures the temperature of the hot water in the constant temperature hot water tank 1, the heater 17 heats the supplemented hot water to the required temperature according to the temperature value of the seventh thermometer 161, the first liquid level meter 162 measures the liquid level change of the hot water in the constant temperature hot water tank 1, and the second switch valve 18 supplements the hot water according to the hot water quantity of the first liquid level meter 162; an eighth thermometer 261 and a second liquid level gauge 262 are provided in the constant temperature cold water tank 2, the second liquid level gauge 262 measures a change in the level of cold water in the constant temperature hot water tank 1, and the second on-off valve 27 supplements cold water in accordance with the amount of cold water of the second liquid level gauge 262. Because the duration of one durability test is long, for example, a 2400-hour durability test needs 100 days, the evaporation of liquid possibly occurs in the operation process of the system to reduce the liquid, in order to ensure the long-term operation of the system, the system is provided with an automatic water replenishing device, the automatic water replenishing device uses an external water source to replenish water, and the temperature of the system liquid in the water replenishing process meets the requirements of (15-20) DEG C, (80-85) DEG C and (90-95) DEG C. In addition, the constant-temperature hot water tank 1 adopts a sealed water tank, and the first water outlet pipeline 11, the third water outlet pipeline 12 and the test pipeline 3 are paved with heat-insulating layers to prevent the evaporation of heat-carrying media and the loss of the temperature of the media.
The invention also provides a test method using the heat meter durability test device, which comprises the following steps:
step 1)2400 hr durability test
Closing a second variable-frequency water pump 23, a third variable-frequency water pump 14 and a fourth variable-frequency water pump 24, presetting the opening degree of a flow regulating valve in the flow regulating pipeline connected in parallel, starting a first variable-frequency water pump 13, and circularly pumping hot water in a constant-temperature hot water tank 1 into a test pipeline 3 to perform a 2400-hour durability test, wherein the temperature of the hot water is 80-85 ℃;
2400 hours durability test was conducted at a flow rate of 1.5qiInitially, it took 15min to increase the flow uniformly to qpAt q ispAfter running for 8 hours, the flow is uniformly increased to q within 15minsAt q issAfter running for 1h, the flow is uniformly reduced to q within 15minpAt q ispAfter running for 8 hours, the flow is uniformly reduced to 1.5qi in 15min, and the operation is carried out for 6 hours under 1.5qi, so that the flow change of 24 hours in one period is completed. When the device is at a steady flow point, the flow rate q is usually usedpAnd 1.5 times the minimum flow qiIs ± 5%; maximum flow qsIs-5%.
Step 2)1000 hours additional durability test
Closing the second variable frequency water pump 23, the third variable frequency water pump 14 and the fourth variable frequency water pump 24, and presetting the opening degree of a flow regulating valve in the two parallel flow regulating pipelines as the maximum flow qsStarting a first variable frequency water pump 13 and circularly pumping hot water in the constant temperature hot water tank 1 into a test pipeline 3, and carrying out a durability test at a hot water temperature of 80-85 ℃ in the first 500 hours; and supplementing 90-95 ℃ hot water into the constant-temperature hot water tank 1 for carrying out durability test after 500 hours.
Step 3)4000 times of temperature cycle impact test
The third variable frequency water pump 14 and the fourth variable frequency water pump 24 are closed, and the opening degree of the flow regulating valve in the two parallel flow regulating pipelines is preset to be the common flow qpAnd alternately starting the first variable-frequency water pump 13 and the second variable-frequency water pump 23 to alternately pump hot water in the constant-temperature hot water tank 1 into the test pipeline 3 and pump cold water in the constant-temperature cold water tank 2 into the test pipeline 3, and in the circulation process of one water tank, performing self-circulation on the other water tank at the same flow rate, wherein the temperature of the hot water is 80-85 ℃ and the temperature of the cold water is 15-20 ℃. Each stage was 2.5 minutes with 5 minutes for 1 cycle.
In order to ensure that the difference between the actual flow value and the theoretical flow value is not more than 10% in the 15-minute flow switching process, the electromagnetic flowmeter, the flow regulating valve and the variable frequency pump form a complete closed-loop system, and the stable switching process is ensured by matching with the system pressure control. Because of the flow scope broad, selected 2 electromagnetic flow control valves in the design, two are parallelly connected promptly flow control valve in the flow control pipeline adopts the mode of switching use, when two valves switch, in order to avoid the flow impact that the valve full-open complete shut caused, adopts the mode of presetting the valve aperture to realize the undisturbed switching.
It should be noted that the above summary and the detailed description are intended to demonstrate the practical application of the technical solutions provided by the present invention, and should not be construed as limiting the scope of the present invention. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the invention. The scope of the invention is to be determined by the appended claims.
Claims (9)
1. The durability test device for the heat meter is characterized by comprising a constant-temperature hot water tank (1), a constant-temperature cold water tank (2), a test pipeline (3) and a flow regulating pipeline formed by serially connecting a flow regulating valve and an electromagnetic flowmeter; wherein,
the constant-temperature hot water tank (1) is communicated with an inlet of the test pipeline (3) through a first water outlet pipeline (11), and hot water is pumped into the test pipeline (3) by a first variable-frequency water pump (13); the constant-temperature cold water tank (2) is communicated with an inlet of the test pipeline (3) through a second water outlet pipeline (21), and cold water is pumped into the test pipeline (3) through a second variable-frequency water pump (23); the outlet of the test pipeline (3) is respectively communicated with the constant-temperature hot water tank (1) and the constant-temperature cold water tank (2) through two flow regulating pipelines connected in parallel to form a hot water test large circulation pipeline and a cold test large circulation pipeline; a first thermometer (31) and a first pressure transmitter (32) are arranged at the inlet of the test pipeline (3), and a second thermometer (33) and a second pressure transmitter (34) are arranged at the outlet of the test pipeline (3);
the test pipeline (3) consists of an A measured meter group (35) and a B measured meter group (36) which are connected in parallel, the constant-temperature hot water tank (1) is communicated with an inlet of the A measured meter group (35) through a third water outlet pipeline (12), and hot water is pumped into the A measured meter group (35) through a third variable-frequency water pump (14); the outlet of the measured meter group A (35) is communicated with the constant-temperature hot water tank (1) through one flow regulating pipeline to form a hot water test small circulation pipeline; a third thermometer (351) and a third pressure transmitter (352) are arranged at the inlet of the A measured meter group (35), and a fourth thermometer (353) and a fourth pressure transmitter (354) are arranged at the outlet of the A measured meter group (35);
the constant-temperature cold water tank (2) is communicated with an inlet of the B measured meter group (36) through a fourth water outlet pipeline (22), and cold water is pumped into the B measured meter group (36) through a fourth variable-frequency water pump (24); the outlet of the measured meter group (36) is communicated with the constant-temperature cold water tank (2) through one flow regulating pipeline to form a cold water test small circulation pipeline; and a fifth thermometer (361) and a fifth pressure transmitter (362) are arranged at the inlet of the B measured meter group (36), and a sixth thermometer (363) and a sixth pressure transmitter (364) are arranged at the inlet of the B measured meter group (36).
2. The durability test device for the heat meter as claimed in claim 1, wherein a hot water self-circulation pipeline (15) is branched from the first water outlet pipeline (11) and communicated to the constant-temperature hot water tank (1), and the self-circulation flow rate of the constant-temperature hot water tank (1) is controlled by a flow regulating valve; a cold water self-circulation pipeline (25) is branched from the second water outlet pipeline (21) and communicated to the constant-temperature cold water tank (2), and the self-circulation flow rate of the constant-temperature cold water tank (2) is controlled by a flow regulating valve.
3. The durability test device for the heat meter according to claim 1, wherein the constant temperature hot water tank (1) is provided with a hot water replenishing pipeline (16), the hot water replenishing pipeline (16) is provided with a heater (17) and the replenishing of hot water is controlled by a second switch valve (18); the constant-temperature cold water tank (2) is provided with a cold water replenishing pipeline (26), and the hot water replenishing pipeline (26) controls replenishing cold water through a second switch valve (27).
4. The calorimeter durability test device according to claim 3, wherein a seventh thermometer (161) and a first level gauge (162) are provided in the constant-temperature hot-water tank (1), the seventh thermometer (161) measures the temperature of the hot water in the constant-temperature hot-water tank (1), the heater (17) heats the replenished hot water to a required temperature according to the temperature value of the seventh thermometer (161), the first level gauge (162) measures the level change of the hot water in the constant-temperature hot-water tank (1), and the second on-off valve (18) replenishes the hot water according to the amount of the hot water of the first level gauge (162); an eighth thermometer (261) and a second liquid level meter (262) are arranged in the constant-temperature cold water tank (2), the second liquid level meter (262) measures the liquid level change of cold water in the constant-temperature hot water tank (1), and the second switch valve (27) supplements cold water according to the cold water quantity of the second liquid level meter (262).
5. The calorimeter durability test device according to claim 1, wherein the length of the straight pipe section at the front end of each of the meters to be tested in the meter group A (35) and the meter group B (36) is 10 times the caliber of the meter to be tested, and the length of the straight pipe section at the rear end is 5 times the caliber of the meter to be tested.
6. The durability test device for the heat meter according to claim 1, characterized in that a sealed water tank is adopted as the constant temperature hot water tank (1), and heat insulation layers are laid on the first water outlet pipeline (11), the third water outlet pipeline (12) and the test pipeline (3) to prevent evaporation of heat carrying media and loss of media temperature.
7. A test method using the calorimeter durability test apparatus of any one of claims 1 to 6, the method comprising the steps of:
step 1)2400 hr durability test
Closing a second variable-frequency water pump (23), a third variable-frequency water pump (14) and a fourth variable-frequency water pump (24), presetting the opening degree of a flow regulating valve in the two parallel flow regulating pipelines, starting a first variable-frequency water pump (13) and circularly pumping hot water in a constant-temperature hot water tank (1) into a test pipeline (3) for a 2400-hour durability test, wherein the temperature of the hot water is 80-85 ℃; or
Step 2)1000 hours additional durability test
The second variable frequency water pump (23), the third variable frequency water pump (14) and the fourth variable frequency water pump (24) are closed, and the opening degree of a flow regulating valve in the two parallel flow regulating pipelines is preset to be the maximum flow qsStarting a first variable-frequency water pump (13) and circularly pumping hot water in the constant-temperature hot water tank (1) into a test pipeline (3), and carrying out a durability test at a hot water temperature of 80-85 ℃ in the first 500 hours; supplementing 90-95 ℃ hot water into the constant-temperature hot water tank (1) for 500 hours later to perform a durability test; or
Step 3)4000 times of temperature cycle impact test
The third variable frequency water pump (14) and the fourth variable frequency water pump (24) are closed, and the opening degree of a flow regulating valve in the two parallel flow regulating pipelines is preset to be a common flow qpAnd alternately starting the first variable-frequency water pump (13) and the second variable-frequency water pump (23) to alternately pump hot water in the constant-temperature hot water tank (1) into the test pipeline (3) and pump cold water in the constant-temperature cold water tank (2) into the test pipeline (3), and in the circulation process of one water tank, the other water tank performs self-circulation at the same flow rate, the temperature of the hot water is 80-85 ℃, and the temperature of the cold water is 15-20 ℃.
8. The test method of claim 7, wherein the flow regulating valves in the two parallel flow regulating pipelines are switched to avoid flow impact caused by full opening and closing of the valves.
9. The test method as claimed in claim 7, wherein the 2400-hour durability test in step 1) is a flow rate of from 1.5qiInitially, it took 15min to increase the flow uniformly to qpAt q ispAfter running for 8 hours, the flow is uniformly increased to q within 15minsAt q issAfter running for 1h, the flow is uniformly reduced to q within 15minpAt q ispAfter running for 8 hours, the flow is uniformly reduced to 1.5qi in 15min, and the operation is carried out for 6 hours under 1.5qi, so that the flow change of 24 hours in one period is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209058.5A CN108151918B (en) | 2018-03-14 | 2018-03-14 | Heat meter durability test device and test method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810209058.5A CN108151918B (en) | 2018-03-14 | 2018-03-14 | Heat meter durability test device and test method thereof |
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| Publication Number | Publication Date |
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| CN108151918A true CN108151918A (en) | 2018-06-12 |
| CN108151918B CN108151918B (en) | 2020-01-17 |
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| CN201810209058.5A Active CN108151918B (en) | 2018-03-14 | 2018-03-14 | Heat meter durability test device and test method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593150A (en) * | 2018-07-10 | 2018-09-28 | 浙江永阳节能技术有限公司 | A kind of hot and cold scale detection device |
| CN110207972A (en) * | 2019-07-05 | 2019-09-06 | 上海迦锐自动化检测科技有限公司 | A kind of life testing method and test equipment of automobile cooling system components |
| CN111999048A (en) * | 2020-08-14 | 2020-11-27 | 临海伟星新型建材有限公司 | Pressure detection device and detection method for drainage vertical pipe |
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| CN104198089A (en) * | 2014-08-22 | 2014-12-10 | 山西省计量科学研究院 | Durability testing device and method for temperature sensor of calorimeter |
| CN205373920U (en) * | 2016-02-03 | 2016-07-06 | 陕西省计量科学研究院 | Heat meter durability test device |
| CN105973506A (en) * | 2016-07-19 | 2016-09-28 | 泉州七洋机电有限公司 | Cold-hot independent circulation calorimeter durability test device |
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| CN104198089A (en) * | 2014-08-22 | 2014-12-10 | 山西省计量科学研究院 | Durability testing device and method for temperature sensor of calorimeter |
| CN205373920U (en) * | 2016-02-03 | 2016-07-06 | 陕西省计量科学研究院 | Heat meter durability test device |
| CN105973506A (en) * | 2016-07-19 | 2016-09-28 | 泉州七洋机电有限公司 | Cold-hot independent circulation calorimeter durability test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593150A (en) * | 2018-07-10 | 2018-09-28 | 浙江永阳节能技术有限公司 | A kind of hot and cold scale detection device |
| CN110207972A (en) * | 2019-07-05 | 2019-09-06 | 上海迦锐自动化检测科技有限公司 | A kind of life testing method and test equipment of automobile cooling system components |
| CN111999048A (en) * | 2020-08-14 | 2020-11-27 | 临海伟星新型建材有限公司 | Pressure detection device and detection method for drainage vertical pipe |
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| CN108151918B (en) | 2020-01-17 |
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