A heat metering device suitable for different load rates

Abstract

The utility model discloses a heat metering device suitable for different load rates, comprising high load rate heat metering device, low load rate heat metering device and large diameter equal diameter tee joint, wherein the high load rate heat metering device comprises large diameter heat meter, large diameter heat supply pipeline A and two large diameter valves A, and the low load rate heat metering device comprises small diameter heat meter, small diameter heat supply pipeline, two variable diameter pipes, two sections of large diameter heat supply pipeline B, two large diameter valves B and two large diameter elbows. The device can be used for heat metering under high load rate and heat metering under low load rate, thereby effectively improving the accuracy of trade settlement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of central heating heat metering, in particular to a heat metering device suitable for different load rates. BACKGROUND

[0002] The pipe diameter of the central heating pipeline is determined according to the principle of overall planning, and the selection of the heat meter is generally also made according to the pipe diameter of the heating pipeline. In the case of low load rate in the initial stage of central heating, the flow rate of the heating medium is lower than the minimum flow rate required for the measurement accuracy of the heat meter, and the measured heat value will have a large deviation, thereby affecting the accuracy of trade settlement. SUMMARY

[0003] In view of the defects in the prior art, the present application provides a heat metering device suitable for different load rates, which can be used for heat metering at high load rates and low load rates, thereby effectively improving the accuracy of trade settlement.

[0004] According to the above concept, the technical scheme of the present application is: a heat metering device suitable for different load rates, comprising a high load rate heat metering device, a low load rate heat metering device, and a large-diameter equal-diameter tee; the high load rate heat metering device comprises a large-diameter heat meter, a large-diameter heating pipeline A, and two large-diameter valves A, the large-diameter heat meter is installed in the middle of the large-diameter heating pipeline A, the two large-diameter valves A are installed at the two ends of the large-diameter heating pipeline A, and the two large-diameter valves A are connected to the large-diameter equal-diameter tee; the low load rate heat metering device comprises a small-diameter heat meter, a small-diameter heating pipeline, two reducing pipes, two sections of large-diameter heating pipeline B, two large-diameter valves B, and two large-diameter elbows, the small-diameter heat meter is installed in the middle of the small-diameter heating pipeline, the two ends of the small-diameter heating pipeline are connected to one end of the two sections of large-diameter heating pipeline B through the two reducing pipes, the other end of the two sections of large-diameter heating pipeline B is connected to the two large-diameter valves B, the two large-diameter valves B are connected to one end of the two large-diameter elbows, and the other end of the two large-diameter elbows is connected to the large-diameter equal-diameter tee.

[0005] Further, the length of the large-diameter heating pipeline A before and after the large-diameter heat meter is greater than or equal to the minimum length required for the measurement accuracy of the large-diameter heat meter.

[0006] Further, the length of the small-diameter heating pipeline before and after the small-diameter heat meter is greater than or equal to the minimum length required for the measurement accuracy of the small-diameter heat meter.

[0007] Further, the large-diameter heating pipelines A and B adopt DN350, the large-diameter heat meter adopts DN350, and the large-diameter valves A and B adopt DN350.

[0008] Further, the small-diameter heat supply pipeline adopts DN200, and the small-diameter heat meter adopts DN200.

[0009] The present application has the following advantages and positive effects:

[0010] 1. In the low load rate working condition, two large-diameter valves A on the high load rate heat metering device are closed, and the low load rate heat metering device can accurately measure the heat value in the low load rate working condition.

[0011] 2. In the high load rate working condition, two large-diameter valves B on the low load rate heat metering device are closed, and the high load rate heat metering device can accurately measure the heat value in the high load rate working condition.

[0012] 3. In the high load rate working condition, the low load rate heat metering device can be replaced by a new high load rate heat metering device, forming a high load rate heat metering device with one in use and one in standby. When one set of high load rate heat metering device is calibrated, the other set of high load rate heat metering device can operate normally, thereby realizing uninterrupted heat metering. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure of the embodiment of the present application is shown.

[0014] In the figure, 1 represents a high load rate heat metering device; 11 represents a large-diameter heat meter; 12 represents a large-diameter heat supply pipeline A; 13 represents a large-diameter valve A; 2 represents a low load rate heat metering device; 21 represents a small-diameter heat meter; 22 represents a small-diameter heat supply pipeline; 23 represents a reducing pipe; 24 represents a large-diameter heat supply pipeline B; 25 represents a large-diameter valve B; 26 represents a large-diameter elbow; and 3 represents a large-diameter equal-diameter tee. DETAILED DESCRIPTION

[0015] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0016] The embodiment of the present application provides a heat metering device suitable for different load rates, as shown in the figure, which comprises a high load rate heat metering device 1, a low load rate heat metering device 2 and a large-diameter equal-diameter tee 3. The large-diameter equal-diameter tee 3 of the present embodiment is used to connect the high load rate heat metering device 1 and the low load rate heat metering device 2.

[0017] The high-load-rate heat metering device 1 comprises a large-diameter heat meter 11, a large-diameter heat supply pipeline A and two large-diameter valves A; the large-diameter heat meter 11 is installed in the middle of the large-diameter heat supply pipeline A, and the two large-diameter valves A are respectively installed at the two ends of the large-diameter heat supply pipeline A and are respectively connected to two large-diameter equal-diameter tees 3.

[0018] The low-load-rate heat metering device comprises a small-diameter heat meter 21, a small-diameter heat supply pipeline 22, two variable-diameter pipes 23, two large-diameter heat supply pipelines B, two large-diameter valves B and two large-diameter elbows 26; the small-diameter heat meter 21 is installed in the middle of the small-diameter heat supply pipeline 22, the two ends of the small-diameter heat supply pipeline 22 are respectively connected to one end of the two large-diameter heat supply pipelines B through the two variable-diameter pipes 23, the other end of the two large-diameter heat supply pipelines B is respectively connected to the two large-diameter valves B, the two large-diameter valves B are respectively connected to one end of the two large-diameter elbows 26, and the other end of the two large-diameter elbows 26 is respectively connected to the large-diameter equal-diameter tees 3.

[0019] The length of the large-diameter heat supply pipeline A before and after the large-diameter heat meter 11 is greater than or equal to the minimum length required by the measurement accuracy of the large-diameter heat meter 11.

[0020] The length of the small-diameter heat supply pipeline 22 before and after the small-diameter heat meter 21 is greater than or equal to the minimum length required by the measurement accuracy of the small-diameter heat meter 21.

[0021] In the low-load-rate working condition, the two large-diameter valves A on the high-load-rate heat metering device 1 are closed, and the low-load-rate heat metering device 2 can accurately measure the heat value in the low-load-rate working condition.

[0022] In the high-load-rate working condition, the two large-diameter valves B on the low-load-rate heat metering device 2 are closed, and the high-load-rate heat metering device 1 can accurately measure the heat value in the high-load-rate working condition.

[0023] In the high-load-rate working condition, the low-load-rate heat metering device 2 can be replaced by a new high-load-rate heat metering device 1 to form a high-load-rate heat metering device 1 with one in use and one in standby, so that when one set of high-load-rate heat metering device 1 is calibrated, the other set of high-load-rate heat metering device 1 can normally operate, thereby realizing uninterrupted heat metering.

[0024] Taking the large-diameter heat supply pipeline A with DN350 and the initial heat supply load of 5t / h as an example, the minimum measurement accuracy of the large-diameter heat meter DN350 is 8t / h, so the flow rate of 5t / h in the initial heat supply is lower than the minimum flow rate 8t / h required by the measurement accuracy of the large-diameter heat meter DN350, and the measured heat value will have a large deviation.

[0025] The large-diameter heat supply pipeline A adopts DN350, the large-diameter heat meter adopts DN350, the large-diameter valves A and B adopt DN350, the small-diameter heat supply pipeline adopts DN200, the small-diameter heat meter adopts DN200, and the minimum measurement accuracy of the small-diameter heat meter DN200 is 2t / h; the flow rate of the initial heat supply is 5t / h, which is higher than the minimum flow rate 2t / h required by the measurement accuracy of the small-diameter heat meter DN200, so the two large-diameter valves A on the high-load rate heat metering device are closed, and the heat value in the low-load rate working condition can be accurately measured through the low-load rate heat metering device.

[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

Claims

1. A heat metering device suitable for different load rates, characterized by: It comprises high load rate heat metering device, low load rate heat metering device and large diameter equal-diameter tee; the high load rate heat metering device comprises large diameter heat meter, large diameter heat supply pipeline A and two large diameter valves A, the large diameter heat meter is installed in the middle of the large diameter heat supply pipeline A, the two large diameter valves A are installed at the two ends of the large diameter heat supply pipeline A respectively, and the two large diameter valves A are connected with the large diameter equal-diameter tee respectively; the low load rate heat metering device comprises small diameter heat meter, small diameter heat supply pipeline, two reducing pipes, two large diameter heat supply pipelines B, two large diameter valves B and two large diameter elbows, the small diameter heat meter is installed in the middle of the small diameter heat supply pipeline, the two ends of the small diameter heat supply pipeline are connected with one end of the two large diameter heat supply pipelines B through the two reducing pipes respectively, the other end of the two large diameter heat supply pipelines B is connected with the two large diameter valves B respectively, the two large diameter valves B are connected with one end of the two large diameter elbows respectively, and the other end of the two large diameter elbows is connected to the large diameter equal-diameter tee; The length of the large diameter heat supply pipeline A before and after the large diameter heat meter is greater than or equal to the minimum length required by the measuring accuracy of the large diameter heat meter; The length of the small diameter heat supply pipeline before and after the small diameter heat meter is greater than or equal to the minimum length required by the measuring accuracy of the small diameter heat meter; The large diameter heat supply pipelines A and B adopt DN350, the large diameter heat meter adopts DN350, and the large diameter valves A and B adopt DN350; The small diameter heat supply pipeline adopts DN200, and the small diameter heat meter adopts DN200.

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