CN112556888A - Heat metering device suitable for different load factors - Google Patents
Heat metering device suitable for different load factors Download PDFInfo
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- CN112556888A CN112556888A CN202011503494.7A CN202011503494A CN112556888A CN 112556888 A CN112556888 A CN 112556888A CN 202011503494 A CN202011503494 A CN 202011503494A CN 112556888 A CN112556888 A CN 112556888A
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- 238000005259 measurement Methods 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
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Abstract
A heat metering device suitable for different load rates comprises a high load rate heat metering device, a low load rate heat metering device and a large-caliber equal-diameter tee joint; the high load rate heat metering device comprises a large-caliber heat meter, a large-caliber heat supply pipeline A and two large-caliber valves A, and the low load rate heat metering device comprises a small-caliber heat meter, a small-caliber heat supply pipeline, two reducer pipes, two sections of large-caliber heat supply pipelines B, two large-caliber valves B and two large-caliber elbows. The device can be used for heat measurement under high load rate and low load rate, thereby effectively improving the accuracy of trade settlement.
Description
Technical Field
The invention relates to the field of centralized heating heat metering, in particular to a heat metering device suitable for different load rates.
Background
The pipe diameter of the centralized heat supply pipeline is determined according to the overall planning consideration principle, and the model selection of the heat meter is generally carried out according to the pipe diameter of the heat supply pipeline. When the load factor is low in the initial stage of central heating and the flow rate of the heating medium is lower than the minimum flow rate required by the measurement accuracy of the heat meter, the measured heat value has a large deviation, thereby affecting the accuracy of trade settlement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the heat metering device suitable for different load rates, which can be used for heat metering under high load rate and low load rate, thereby effectively improving the accuracy of trade settlement.
As conceived above, the technical scheme of the invention is as follows: a heat metering device suitable for different load rates comprises a high load rate heat metering device, a low load rate heat metering device and a large-caliber equal-diameter tee joint; the high-load-factor heat metering device comprises a large-caliber heat meter, a large-caliber heat supply pipeline A and two large-caliber valves A, wherein the large-caliber heat meter is arranged in the middle of the large-caliber heat supply pipeline A, the two large-caliber valves A are respectively arranged at two ends of the large-caliber heat supply pipeline A, and the two large-caliber valves A are respectively connected with a large-caliber constant-diameter tee joint; the low-load-rate heat metering device comprises a small-caliber heat meter, a small-caliber heat supply pipeline, two reducing pipes, two sections of large-caliber heat supply pipelines B, two large-caliber valves B and two large-caliber elbows, wherein the small-caliber heat meter is installed at the middle part of the small-caliber heat supply pipeline, two ends of the small-caliber heat supply pipeline are respectively connected with one end of each of the two sections of large-caliber heat supply pipelines B through the two reducing pipes, the other ends of the two sections of large-caliber heat supply pipelines B are respectively connected with the two large-caliber valves B, the two large-caliber valves B are respectively connected with one ends of the two large-caliber elbows, and the other ends of the two large-caliber.
Further, the length of the front and rear large-caliber heat supply pipelines A of the large-caliber heat meter is larger than or equal to the minimum length required by the measurement accuracy of the large-caliber heat meter.
Further, the length of the front and back small-caliber heat supply pipelines of the small-caliber heat meters is larger than or equal to the minimum length required by the measurement accuracy of the small-caliber heat meters.
Furthermore, DN350 is adopted by the large-caliber heat supply pipeline A, B, DN350 is adopted by the large-caliber heat meter, and DN350 is adopted by the large-caliber valve A, B.
Furthermore, the small-caliber heat supply pipeline adopts DN200, and the small-caliber heat meter adopts DN 200.
The invention has the following advantages and positive effects:
1. under the working condition of low load rate, the two large-caliber valves A on the high-load-rate heat metering device are closed, and the heat value under the working condition of low load rate can be accurately measured by the low-load-rate heat metering device.
2. Under the working condition of high load rate, the two large-caliber valves B on the low-load rate heat metering device are closed, and the heat value under the working condition of high load rate can be accurately measured by the high-load rate heat metering device.
3. Under the working condition of high load rate, the low load rate heat metering device can be replaced by a set of new high load rate heat metering device to form a one-use one-standby high load rate heat metering device, and when one set of high load rate heat metering device is verified, the other set of high load rate heat metering device can normally operate, so that uninterrupted heat metering is realized.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1 denotes a high load rate heat metering device; 11 denotes a large-caliber heat meter; 12 denotes a large-caliber heat supply pipeline A; 13 denotes a large-diameter valve a; 2 denotes a low-load-rate heat metering device; 21 denotes a small-caliber heat meter; 22 denotes a small caliber heat supply pipeline; 23 denotes a reducer pipe; 24 denotes a large-caliber heat supply pipeline B; 25 denotes a large-diameter valve B; 26 denotes a large-diameter elbow; and 3, a large-caliber equal-diameter tee joint.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The embodiment of the invention provides a heat metering device suitable for different load rates, which comprises a high-load-rate heat metering device 1, a low-load-rate heat metering device 2 and a large-caliber constant-diameter tee 3, wherein the large-caliber constant-diameter tee 3 is used for connecting the high-load-rate heat metering device 1 and the low-load-rate heat metering device 2.
The high-load-factor heat metering device 1 comprises a large-caliber heat meter 11, a large-caliber heat supply pipeline A and a large-caliber valve A; the large-caliber heat meter 11 is arranged in the middle of the large-caliber heat supply pipeline A, the two large-caliber valves A are respectively arranged at two ends of the large-caliber heat supply pipeline A, and the two large-caliber valves A are respectively connected with the large-caliber equal-diameter tee joint 3.
The low-load-rate heat metering device comprises a small-caliber heat meter 21, a small-caliber heat supply pipeline 22, two reducing pipes 23, two sections of large-caliber heat supply pipelines B, two large-caliber valves B and two large-caliber elbows 26, wherein the small-caliber heat meter 21 is installed at the middle part of the small-caliber heat supply pipeline 22, two ends of the small-caliber heat supply pipeline 22 are respectively connected with one ends of the two sections of large-caliber heat supply pipelines B through the two reducing pipes 23, the other ends of the two sections of large-caliber heat supply pipelines B are respectively connected with the two large-caliber valves B, the two large-caliber valves B are respectively connected with one ends of the two large-caliber elbows 26, and the other ends of the two large-caliber elbows 26 are.
The length of the large-caliber heat supply pipeline A in front of and behind the large-caliber heat meter 11 is larger than or equal to the minimum length required by the measurement accuracy of the large-caliber heat meter 11.
The length of the front and back small-caliber heat supply pipelines 22 of the small-caliber heat meter 21 is larger than or equal to the minimum length required by the measurement accuracy of the small-caliber heat meter 21.
Under the working condition of low load rate, two large-caliber valves A on the high load rate heat metering device 1 are closed, and the heat value under the working condition of low load rate can be accurately measured through the low load rate heat metering device 2.
Under the working condition of high load rate, two large-caliber valves B on the low-load-rate heat metering device 2 are closed, and the heat value under the working condition of high load rate can be accurately measured through the high-load-rate heat metering device 1.
Under the working condition of high load rate, the low load rate heat metering device 2 can be replaced by a set of new high load rate heat metering device 1 to form a high load rate heat metering device 1 which is used and prepared, and when one set of high load rate heat metering device 1 is verified, the other set of high load rate heat metering device 1 can normally operate, so that uninterrupted heat metering is realized.
In the invention, for example, a large-caliber heat supply pipeline A adopts DN350, the load at the initial stage of heat supply is 5t/h, and the minimum measurement precision of a large-caliber heat meter DN350 is 8t/h, so that the flow rate at the initial stage of heat supply is 5t/h lower than the minimum flow rate 8t/h required by the measurement precision of the large-caliber heat meter DN350, and the measured heat value has great deviation.
The invention adopts DN350 for the large-caliber heat supply pipeline A, DN350 for the large-caliber heat meter, DN350 for the large-caliber valve A, B, DN350 for the small-caliber heat supply pipeline and DN200 for the small-caliber heat meter, the minimum measurement precision of the small-caliber heat meter DN200 is 2t/h, the flow 5t/h at the initial stage of heat supply is higher than the minimum flow 2t/h required by the measurement precision of the small-caliber heat meter DN200, therefore, two large-caliber valves A on the high-load-rate heat metering device are closed, and the heat value under the working condition of low load rate can be accurately measured by the low-load-rate heat metering device.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (5)
1. A heat metering device adapted for different load rates, characterized by: the system comprises a high-load-rate heat metering device, a low-load-rate heat metering device and a large-caliber equal-diameter tee joint; the high-load-factor heat metering device comprises a large-caliber heat meter, a large-caliber heat supply pipeline A and two large-caliber valves A, wherein the large-caliber heat meter is arranged in the middle of the large-caliber heat supply pipeline A, the two large-caliber valves A are respectively arranged at two ends of the large-caliber heat supply pipeline A, and the two large-caliber valves A are respectively connected with a large-caliber constant-diameter tee joint; the low-load-rate heat metering device comprises a small-caliber heat meter, a small-caliber heat supply pipeline, two reducing pipes, two sections of large-caliber heat supply pipelines B, two large-caliber valves B and two large-caliber elbows, wherein the small-caliber heat meter is installed at the middle part of the small-caliber heat supply pipeline, two ends of the small-caliber heat supply pipeline are respectively connected with one end of each of the two sections of large-caliber heat supply pipelines B through the two reducing pipes, the other ends of the two sections of large-caliber heat supply pipelines B are respectively connected with the two large-caliber valves B, the two large-caliber valves B are respectively connected with one ends of the two large-caliber elbows, and the other ends of the two large-caliber.
2. A heat metering device suitable for different load rates according to claim 1, wherein: the length of the large-caliber heat supply pipeline A in front of and behind the large-caliber heat meter is larger than or equal to the minimum length required by the measurement accuracy of the large-caliber heat meter.
3. A heat metering device suitable for different load rates according to claim 1, wherein: the length of the front and back small-caliber heat supply pipelines of the small-caliber heat meter is larger than or equal to the minimum length required by the measurement accuracy of the small-caliber heat meter.
4. A heat metering device suitable for different load rates according to claim 1, wherein: the large-caliber heat supply pipeline A, B adopts DN350, the large-caliber heat meter adopts DN350, and the large-caliber valve A, B adopts DN 350.
5. A heat metering device suitable for different load rates according to claim 1, wherein: the small-caliber heat supply pipeline adopts DN200, and the small-caliber heat meter adopts DN 200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503494.7A CN112556888A (en) | 2020-12-18 | 2020-12-18 | Heat metering device suitable for different load factors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503494.7A CN112556888A (en) | 2020-12-18 | 2020-12-18 | Heat metering device suitable for different load factors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112556888A true CN112556888A (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011503494.7A Pending CN112556888A (en) | 2020-12-18 | 2020-12-18 | Heat metering device suitable for different load factors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112556888A (en) |
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2020
- 2020-12-18 CN CN202011503494.7A patent/CN112556888A/en active Pending
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