Heat supply pipeline steam large and small flow measuring device

Abstract

The utility model discloses a heat supply pipeline steam large and small flow measuring device which comprises a heat supply heat source, a heat supply pipeline is assembled at the output end of the heat supply heat source, a main pipeline is assembled at the end of the heat supply pipeline, a bearing hoop is assembled between the main pipeline and the heat supply pipeline, and a connecting pipeline is assembled on the side wall of the main pipeline. A bypass pipeline is assembled on the side wall of the connecting pipeline, a flow monitor is assembled on the side wall of the main pipeline, a flow measuring mechanism a is assembled on the side wall of the main pipeline, and a flow measuring mechanism b is assembled on the side wall of the bypass pipeline; according to the heat supply pipeline steam large and small flow measuring device, the bearing hoop is arranged between the main pipeline and the heat supply pipeline in a connected mode, the sealing performance of the bearing hoop is improved through the sealing assembly and the bolt body arranged in the bearing hoop, and the problem that the connecting sealing performance is affected by follow-up dismounting and maintaining is avoided.

Description

Technical Field

[0001] This utility model relates to the field of steam metering technology for long-distance heating network steam pipelines, specifically a device for measuring the flow rate of steam in heating pipelines. Background Technology

[0002] When transporting steam over long distances, the steam flow rate directly affects the steam quality, potentially leading to heat loss and failure to meet user requirements. Current technologies suffer from large coarse-grained errors in flow measurement, with the error increasing as the flow rate decreases. When the flow rate is less than 10, the error increases rapidly, making accurate steam measurement impossible. This is particularly problematic for differential pressure flow meters. Whether using standard throttling devices or balanced flow meters, the differential pressure is proportional to the square of the flow rate. The system ends with a square-root element, resulting in a large amplification factor at very low flow rates. For example, a change of 1 in differential pressure is displayed as a change of 10 in flow rate. Therefore, even when valves are closed and there is no flow, small differential pressure signals caused by pressure fluctuations in compressible fluids like steam or minor noise from electronic equipment can still display a considerable flow rate value. This also makes the secondary instrument display highly unstable at low flow rates. To avoid this, dual-pipe measurement of both large and small flow rates is necessary.

[0003] However, there are still some shortcomings in the existing technology. For example, the connection strength between the main pipeline and the heating pipeline is not disclosed, which may affect the steam transmission after subsequent disassembly and maintenance. Therefore, new technical solutions need to be designed to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a steam flow measurement device for heating pipelines, so as to solve the problem mentioned in the background art that the connection strength between the main pipeline and the heating pipeline is not disclosed, which can easily affect the steam transmission after subsequent disassembly and maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steam flow rate measuring device for a heating pipeline, comprising a heating source, a heating pipeline mounted at the output end of the heating source, a main pipeline mounted at the end of the heating pipeline, a bearing clamp mounted between the main pipeline and the heating pipeline, a connecting pipeline mounted on the side wall of the main pipeline, a bypass pipeline mounted on the side wall of the connecting pipeline, a flow monitor mounted on the side wall of the main pipeline, a flow measuring mechanism a mounted on the side wall of the main pipeline, and a flow measuring mechanism b mounted on the side wall of the bypass pipeline;

[0006] The inner wall of the bearing hoop is provided with a mating groove, the outer wall of the main pipe is provided with a mating block, the end of the heating pipe is located inside the bearing hoop and a limit ring is installed, the end of the main pipe is located inside the bearing hoop and a sealing component is installed, fastening plates are installed at both ends of the opening of the bearing hoop, the side wall of the fastening plate is provided with fastening screw holes, and bolt bodies are screwed into the fastening screw holes.

[0007] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, the flow measurement mechanism a includes a first pressure transmitter, a first flow meter, and a first thermal resistance installed on the outer wall of the main pipeline, and the flow measurement mechanism b includes a second pressure transmitter, a second flow meter, and a second thermal resistance installed on the outer wall of the bypass pipeline.

[0008] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, a main shut-off valve is installed on the outer wall of the heating pipeline.

[0009] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, valves are respectively connected to the bypass pipeline and the end of the main pipeline near the heating source, and the valves are connected to a PLC controller.

[0010] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, the sealing assembly includes a sealing gasket a and a sealing gasket b fitted outside the main pipeline, and a rubber block is installed between the sealing gasket a and the sealing gasket b.

[0011] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, the bottom end of the bolt body is provided with a circular groove, and a bolt rod is installed inside the circular groove, and the bolt rod is screwed into the fastening screw hole.

[0012] As a preferred embodiment of the steam flow measurement device for heating pipelines according to this utility model, a fixing ring is installed on the upper outer end of the bolt rod, and an annular pressure plate, a spring and an annular rubber sheet are fitted on the circumferential surface of the bolt rod, with a compression block installed at the upper edge of the annular rubber sheet.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the setting of the steam flow rate measuring device for heating pipelines has a reasonable structural design;

[0014] This project establishes a heat source and a user terminal, with a main pipeline and a bypass pipeline connecting them. Valves are installed on both the main and bypass pipelines, and their opening and closing are controlled by a PLC controller. This controls the steam delivery through the main and bypass pipelines. Pressure transmitters, flow meters, and thermal resistors are installed on the main and bypass pipelines to monitor the steam flow, temperature, and pressure. A load-bearing clamp is installed at the connection between the main pipeline and the heating pipeline. Sealing components and bolt bodies within the load-bearing clamp enhance its sealing performance, preventing issues with connection sealing during subsequent disassembly and maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the main pipeline, load-bearing clamp, and heating pipeline of this utility model;

[0017] Figure 3 This is an exploded schematic diagram of the main pipeline, load-bearing clamp, and heating pipeline of this utility model.

[0018] Figure 4 This is a schematic diagram of the bolt body of this utility model.

[0019] In the diagram: 1. Heat source; 2. Heating pipeline; 3. Bearing clamp; 4. Main pipeline; 5. Connecting pipeline; 6. Bypass pipeline; 7. Main shut-off valve; 8. Flow monitor; 9. First pressure transmitter; 10. First flow meter; 11. First RTD; 12. Second pressure transmitter; 13. Second flow meter; 14. Second RTD; 15. Mating block; 16. Mating groove; 17. Limiting ring; 18. Rubber pad a; 19. Rubber block; 20. Rubber pad b; 21. Valve; 22. PLC controller; 23. Fastening plate; 24. Fastening screw hole; 25. Bolt body; 141. Circular groove; 142. Annular rubber sheet; 143. Bolt rod; 144. Extrusion block; 145. Annular pressure plate; 146. Fixing ring; 147. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution:

[0022] In this technical solution, a steam flow rate measuring device for a heating pipeline includes a heating source 1, a heating pipeline 2 installed at the output end of the heating source 1, a main pipeline 4 installed at the end of the heating pipeline 2, a bearing clamp 3 installed between the main pipeline 4 and the heating pipeline 2, a connecting pipeline 5 installed on the side wall of the main pipeline 4, a bypass pipeline 6 installed on the side wall of the connecting pipeline 5, a flow monitor 8 installed on the side wall of the main pipeline 4, a flow measuring mechanism a installed on the side wall of the main pipeline 4, and a flow measuring mechanism b installed on the side wall of the bypass pipeline 6; a mating groove 14 is provided on the inner wall of the bearing clamp 3, a mating block 15 is provided on the outer wall of the main pipeline 4, a limit ring 17 is installed inside the bearing clamp 3 at the end of the heating pipeline 2, a sealing component is fitted inside the bearing clamp 3 at the end of the main pipeline 4, and fastening plates 23 are installed at both ends of the opening of the bearing clamp 3; fastening screw holes 24 are provided on the side wall of the fastening plates 23, and bolt bodies 25 are screwed into the fastening screw holes 24.

[0023] In this technical solution, the heat source 1 delivers steam through the heating pipe 2. The end of the heating pipe 2 is connected to the main pipe 4 via a bearing clamp 3. The side wall of the main pipe 4 is connected to the bypass pipe 6 via a connecting pipe 5, thereby delivering steam to the user. The mating groove 14 on the inner wall of the bearing clamp 3 mates with the mating block 15 on the outer wall of the main pipe 4, thereby fixing the bearing clamp 3 to the outside of the main pipe 4 and the heating pipe 2. The sealing performance of the bearing clamp 3 can be improved by the sealing component. The bearing clamp 3 can be fastened by two fastening plates 23 and bolt bodies 25.

[0024] In some technical solutions, flow measurement mechanism a includes a first pressure transmitter 9, a first flow meter 10, and a first thermal resistor 11 installed on the outer wall of the main pipeline 4; flow measurement mechanism b includes a second pressure transmitter 12, a second flow meter 13, and a second thermal resistor 14 installed on the outer wall of the bypass pipeline 6; valves 21 are connected to the bypass pipeline 6 and the end of the main pipeline 4 closest to the heat source 1, respectively, and valves 21 are connected to a PLC controller 22.

[0025] In this technical solution, the models and working principles of the flow measurement mechanism a, the flow measurement mechanism b, the valve 21, and the controller 22 are the same as those in patent number CN202210882842.9.

[0026] In some technical solutions, a main shut-off valve 7 is installed on the outer wall of the heating pipeline 2.

[0027] In this technical solution, the switching on and off of the heating pipe 2 can be controlled by shutting off the main valve 7.

[0028] In some technical solutions, the sealing assembly includes a sealing gasket a18 and a sealing gasket b20 fitted outside the main pipe 4, with a rubber block 19 installed between the sealing gasket a18 and the sealing gasket b20.

[0029] In this technical solution, the sealing gasket a18 and the sealing gasket b20 are connected by a rubber block 19, which can be fitted onto the outside of the main pipe 4 after the main pipe 4 is installed inside the bearing clamp 3 for sealing.

[0030] In some technical solutions, a circular groove 141 is provided at the bottom end of the bolt body 25, and a bolt rod 143 is installed inside the circular groove 141. The bolt rod 143 is screwed into the fastening screw hole 24.

[0031] In this technical solution, the bolt rod 143 is vertically fixed in the circular groove 141, thereby being screwed into the fastening screw hole 24.

[0032] In some technical solutions, a retaining ring 146 is installed on the upper outer end of the bolt rod 143, and an annular pressure plate 145, a spring 147 and an annular rubber sheet 142 are fitted on the circumferential surface of the bolt rod 143.

[0033] In this technical solution, the annular pressure plate 145 is located above the fixed ring 146, the spring 147 is located above the annular pressure plate 145, and the annular rubber sheet 142 is located below the fixed ring 146.

[0034] In some technical solutions, an extrusion block 144 is installed at the upper edge of the annular rubber sheet 142.

[0035] In this technical solution, the annular pressure plate 145 is pressed downward by the spring 147, and the extrusion block 144 is pressed downward by the annular pressure plate 145, so that the extrusion block 144 further extrudes the edge of the annular rubber sheet 142, thereby improving the sealing effect.

[0036] Working principle: In use, first, connect the main pipe 4 to the heating pipe 2. Then, put the bearing clamp 3 on the connection between the two, and align the mating block 15 on the outer wall of the main pipe 4 with the mating groove 14 on the inner wall of the bearing clamp 3. Then, fit the two fastening plates 23 on the bearing clamp 3 together, and screw the bolt body 25 into the fastening screw hole 24 in the fastening plate 23 to fix the bearing clamp 3. Then, start using it. Under normal conditions, when the steam flow rate is between 20% and 100%, the PLC controller 22 controls the valve 21 to keep the valve 21 on the main pipe 4 open and the valve 21 on the bypass pipe 6 closed, so that steam flows from the main pipe 4 to the heating source. Steam flows to the user end, where the steam pressure, flow rate, and temperature are measured by the first pressure transmitter 9, the first flow meter 10, and the first thermal resistor 11. The flow monitor 8 monitors the data. When the flow rate is low, i.e., when the flow monitor 8 detects that the steam flow rate is below 20%, the PLC controller 22 controls the valve 21 to close the valve 21 on the main pipeline 4 and open the valve 21 on the bypass pipeline 6, allowing steam to flow from the heating source 1 to the user end through the bypass pipeline 6. The steam pressure, flow rate, and temperature are measured by the second pressure transmitter 12, the second flow meter 13, and the second thermal resistor 14, and the flow monitor 8 monitors the data.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat supply pipeline steam flow rate measuring device comprising a heat supply source (1), characterized in that, The output end of the heat source (1) is equipped with a heating pipe (2), the end of the heating pipe (2) is equipped with a main pipe (4), a bearing clamp (3) is installed between the main pipe (4) and the heating pipe (2), a connecting pipe (5) is installed on the side wall of the main pipe (4), a bypass pipe (6) is installed on the side wall of the connecting pipe (5), a flow monitor (8) is installed on the side wall of the main pipe (4), a flow measuring mechanism a is installed on the side wall of the main pipe (4), and a flow measuring mechanism b is installed on the side wall of the bypass pipe (6). The inner wall of the bearing hoop (3) is provided with a mating groove (16), the outer wall of the main pipe (4) is provided with a mating block (15), the end of the heating pipe (2) is located inside the bearing hoop (3) and a limit ring (17) is installed, the end of the main pipe (4) is located inside the bearing hoop (3) and a sealing component is installed, both ends of the opening of the bearing hoop (3) are provided with fastening plates (23), the side wall of the fastening plate (23) is provided with fastening screw holes (24), and a bolt body (25) is screwed into the fastening screw holes (24).

2. The steam flow measuring device for heating pipes according to claim 1, wherein The flow measurement mechanism a includes a first pressure transmitter (9), a first flow meter (10) and a first thermal resistor (11) installed on the outer wall of the main pipe (4), and the flow measurement mechanism b includes a second pressure transmitter (12), a second flow meter (13) and a second thermal resistor (14) installed on the outer wall of the bypass pipe (6).

3. The device for measuring the flow rate of steam in a heating pipe according to claim 1, wherein The heating pipe (2) is equipped with a main shut-off valve (7) on its outer wall.

4. The steam flow rate measuring device for heating pipelines according to claim 1, characterized in that, The bypass pipe (6) and the main pipe (4) are respectively connected to valves (21) at the end near the heat source (1), and the valves (21) are connected to PLC controllers (22).

5. The steam flow rate measuring device for heating pipelines according to claim 1, characterized in that, The sealing assembly includes a sealing gasket a (18) and a sealing gasket b (20) fitted outside the main pipe (4), with a rubber block (19) installed between the sealing gasket a (18) and the sealing gasket b (20).

6. The steam flow rate measuring device for a heating pipeline according to claim 1, characterized in that, The bottom end of the bolt body (25) is provided with a circular groove (141), and a bolt rod (143) is installed inside the circular groove (141). The bolt rod (143) is screwed into the fastening screw hole (24).

7. The steam flow rate measuring device for a heating pipeline according to claim 6, characterized in that, A retaining ring (146) is installed on the upper outer end of the bolt rod (143). An annular pressure plate (145), a spring (147) and an annular rubber sheet (142) are fitted on the circumferential surface of the bolt rod (143). An extrusion block (144) is installed at the upper edge of the annular rubber sheet (142).

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