Self-powered long-distance heat supply pipe network flow measurement system and method

Abstract

The invention discloses a self-powered long-distance heat supply pipe network flow measurement system and method, and relates to the technical field of electric power engineering, and the system comprises a heat supply pipe network, a branch pipe arranged on the outer wall of the heat supply pipe network, an energy conversion assembly arranged in the branch pipe, a generator connected with the energy conversion assembly, and a flowmeter connected with the heat supply pipe network. High-pressure water in a heat supply pipe network is introduced into the branch pipe, the energy conversion assembly performs energy conversion on the high-pressure water, and the generator converts mechanical energy obtained through conversion into electric energy to be used by the flow meter. High-pressure water in a pipe network is introduced into the multi-stage water turbine through the branch pipe, kinetic energy of fluid is converted into mechanical energy, then the mechanical energy is converted into electric energy through the generator, and power is supplied to the flow meter. The energy utilization efficiency is improved, the dependence on an external power supply is reduced, the maintenance cost is reduced, and the reliability and stability of the system are enhanced. And the system is easy to install and expand, can adapt to different environmental conditions, and provides effective technical support for energy conservation and emission reduction of a heat supply pipe network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power engineering, and particularly relates to a self-powered long-distance heat supply pipe network flow measurement system and method. BACKGROUND

[0002] In modern heat supply systems, long-distance heat supply pipe networks play a crucial role in transporting heat energy from production sites to user terminals. With the increasing demand for heat supply and the expansion of pipe network scale, accurate measurement of pipe network flow becomes particularly important. It not only relates to heat supply efficiency and energy saving, but also involves the safe operation and maintenance cost of the system.

[0003] Traditional independent power generation devices usually include photovoltaic, wind power energy storage and other renewable energy technologies. Although these technologies have potential environmental and cost advantages, their power generation capacity is uncontrollable and is easily affected by external environmental conditions such as weather changes, resulting in unstable power supply. In addition, using lithium batteries or lead-acid batteries as an independent power supply scheme can solve the problem of power supply to a certain extent, but these batteries need to be replaced and maintained regularly, which not only increases the operation and maintenance cost, but also brings additional logistics and management challenges.

[0004] Based on the above problems, we propose a self-powered long-distance heat supply pipe network flow measurement system and method. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is how to design a long-distance heat supply pipe network flow measurement system that can stably and reliably utilize the energy of the fluid itself in the pipe network to realize self-power supply function.

[0006] The above technical problem is solved by the following technical scheme: the present application proposes a self-powered long-distance heat supply pipe network flow measurement system, which comprises a heat supply pipe network, a branch pipe arranged on the outer wall of the heat supply pipe network, an energy conversion assembly arranged in the branch pipe, a generator connected with the energy conversion assembly, and a flow meter connected with the heat supply pipe network; the branch pipe introduces high-pressure water into the heat supply pipe network, and the energy conversion assembly converts the high-pressure water into energy; the generator converts the mechanical energy obtained by conversion into electrical energy for use by the flow meter.

[0007] In one preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system described in the present application: the energy conversion assembly comprises a first-stage water turbine, a second-stage water turbine and a third-stage water turbine connected in series in the branch pipe.

[0008] In one preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system described in the present application: the first-stage water turbine, the second-stage water turbine and the third-stage water turbine are each provided with a moving blade inside.

[0009] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system, the diameter of the moving blade inside the first water turbine is smaller than that of the moving blade inside the second water turbine.

[0010] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system, the diameter of the moving blade inside the second water turbine is smaller than that of the moving blade inside the third water turbine.

[0011] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system, the energy conversion assembly further comprises a rotating shaft that penetrates the interiors of the first, second, and third water turbines, and one end of the rotating shaft is connected to the generator.

[0012] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system, the outer wall of the rotating shaft is provided with a bearing bush, and the connection between the rotating shaft and the branch pipe is provided with a steam seal.

[0013] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement system, the outer wall of the heat supply pipe network is provided with a thermal insulation layer.

[0014] The application further provides a self-powered long-distance heat supply pipe network flow measurement method, which comprises the following steps:

[0015] The first water turbine converts the fluid energy into mechanical energy, and after the pressure drops, the fluid impacts the second water turbine.

[0016] The second water turbine further converts the energy, and after the pressure further drops, the fluid impacts the third water turbine.

[0017] In a preferred embodiment of the self-powered long-distance heat supply pipe network flow measurement method, the third water turbine completes the final energy conversion, and the mechanical energy is transmitted to the generator through the rotating shaft.

[0018] The generator converts the rotating motion of the rotating shaft into electrical energy to power the flow meter.

[0019] The application has the advantages that the high-pressure water in the pipe network is introduced into the multi-stage water turbine through the branch pipe, the kinetic energy of the fluid is converted into mechanical energy, and then the mechanical energy is converted into electrical energy by the generator to power the flow meter. The energy utilization efficiency is improved, the dependence on external power supply is reduced, the maintenance cost is reduced, the reliability and stability of the system are enhanced, the system is easy to install and expand, and can adapt to different environmental conditions, thereby providing effective technical support for energy saving and emission reduction of the heat supply pipe network. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description only relate to some embodiments of the present application and are not a limitation on the present application. Among them:

[0021] Fig. 1 A self-powered long-distance heat supply pipe network flow measurement system diagram is shown;

[0022] Fig. 2 A schematic diagram of the energy conversion assembly connection is shown;

[0023] Fig. 3 A self-powered long-distance heat supply pipe network flow measurement method diagram is shown. DETAILED DESCRIPTION

[0024] In order to make those skilled in the art better understand the present application, the present application will be further described in detail below in conjunction with the specific embodiments and drawings.

[0025] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0026] Referring to Figs. 1-2 , the present embodiment provides a self-powered long-distance heat supply pipe network flow measurement system, comprising a heat supply pipe network 1, a branch pipe 2 provided on the outer wall of the heat supply pipe network 1, the inlet and outlet of the branch pipe 2 are connected with the outer wall of the heat supply pipe network 1, an energy conversion assembly 3 provided in the branch pipe 2, a generator 4 connected with the energy conversion assembly 3 and a flow meter 5 connected with the heat supply pipe network 1;

[0027] The branch pipe 2 introduces high-pressure water into the heat supply pipe network 1, the energy conversion assembly 3 converts the high-pressure water into energy, the generator 4 converts the mechanical energy obtained by conversion into electrical energy for the flow meter 5, the flow meter 5 is connected with the generator 4 through a cable or other means to receive electrical energy for power supply (the connection mode of the generator 4 and the flow meter 5 is the conventional knowledge of those skilled in the art, which will not be described in detail in the present application).

[0028] As an optional embodiment, the energy conversion assembly 3 includes a first-stage water turbine 31, a second-stage water turbine 32 and a third-stage water turbine 33 connected in series in the branch pipe 2, capable of converting the energy of the fluid step by step; the first-stage water turbine 31 is located at the most upstream position of the branch pipe 2, close to the high-pressure water inlet position of the heat supply pipe network 1; the second-stage water turbine 32 is located downstream of the first-stage water turbine 31, receiving water whose pressure has been reduced after energy conversion by the first-stage water turbine 31, and further converting energy; the third-stage water turbine 33 is located downstream of the second-stage water turbine 32, receiving water whose pressure has been further reduced after energy conversion by the second-stage water turbine 32, and completing the final energy conversion; as the fluid flows in the branch pipe 2, its pressure gradually decreases, and the multi-stage water turbine can adapt to this pressure change, ensuring that energy can be effectively converted at different pressure levels.

[0029] As an optional embodiment, the first-stage water turbine 31, the second-stage water turbine 32 and the third-stage water turbine 33 are each internally provided with a moving blade 34; the moving blade 34 is installed on the runner of each stage of water turbine and rotates together with the runner; the moving blade 34 directly contacts with the high-pressure water, and the rotating runner of the water turbine is driven by the impact force of the high-pressure water.

[0030] As an optional embodiment, the diameter of the moving blade 34 inside the first-stage water turbine 31 is smaller than that of the moving blade 34 inside the second-stage water turbine 32; the first-stage water turbine 31 is located at the most upstream end of the branch pipe 2 where the high-pressure water enters, and bears the highest pressure and flow rate from the heat supply pipe network 1; the smaller moving blade 34 can more effectively cope with high-speed fluid, reduce hydraulic loss, and improve the response speed of the water turbine; as the high-pressure water passes through the first-stage water turbine 31 in the branch pipe 2, its pressure and flow rate gradually decrease, and by increasing the diameter of the moving blade 34 of the second-stage water turbine 32, the remaining fluid energy can be more effectively captured and converted.

[0031] As an optional embodiment, the diameter of the moving blade 34 inside the second-stage water turbine 32 is smaller than that of the moving blade 34 inside the third-stage water turbine 33; the third-stage water turbine 33 is located at the last stage of the system, at which time the energy of the high-pressure water has been partially converted by the previous two stages of water turbines; the moving blade 34 of the third-stage water turbine 33 has a larger diameter, which can more effectively capture the remaining fluid energy and further improve the energy conversion efficiency.

[0032] As an optional embodiment, the energy conversion assembly 3 further includes a rotating shaft 35 penetrating the interiors of the first-stage water turbine 31, the second-stage water turbine 32 and the third-stage water turbine 33; the rotating shaft 35 penetrates all the water turbines and is connected to the generator 4 at one end; the main function of the rotating shaft 35 is to convert the energy captured by the moving blades 34 in the water turbines into mechanical rotating energy and transmit it to the generator 4.

[0033] As an optional embodiment, the outer wall of the rotating shaft 35 is provided with a bearing bush 351 to reduce the friction of the rotating shaft 35 during rotation, thereby reducing energy loss and wear. The connection between the rotating shaft 35 and the branch pipe 2 is provided with a steam seal 352 to prevent high-pressure water from leaking from the inside of the water turbine to the outside.

[0034] As an optional embodiment, the outer wall of the heat supply pipe network 1 is provided with a heat preservation layer 11, which can reduce the heat loss of the heat supply pipe network 1 during the transmission of heat energy, help to improve the energy utilization efficiency of the entire heat supply system, and reduce energy consumption.

[0035] In use, by opening the inlet valve of the heat supply pipe network 1, high-pressure water begins to flow into the heat supply pipe network 1, and the high-pressure water is guided into the energy conversion assembly 3 through the branch pipe 2 provided on the outer wall of the heat supply pipe network 1. The fluid flows through the first water turbine 31, the second water turbine 32, and the third water turbine 33 in turn, and in each water turbine, the fluid impacts the dynamic blade 34 to push the rotating shaft 35 to rotate and convert energy. The rotation of the rotating shaft 35 is transmitted to the generator 4 through the connection between the rotating shaft 35 and the generator 4, and the generator 4 converts mechanical energy into electrical energy. The electrical energy generated by the generator 4 is directly supplied to the flow meter 5 connected to the heat supply pipe network 1 to drive the flow meter 5 to measure the flow.

[0036] Referring to Fig. 3 , the embodiment provides a self-powered long-distance heat supply pipe network flow measurement method, which comprises introducing high-pressure water in the heat supply pipe network into a first water turbine through a branch pipe;

[0037] The first water turbine converts fluid energy into mechanical energy, and after the pressure drops, the fluid impacts the second water turbine;

[0038] The second water turbine further converts energy, and after the pressure further drops, the fluid impacts the third water turbine.

[0039] As an optional embodiment, the third water turbine completes the final energy conversion, and the mechanical energy is transmitted to the generator through the rotating shaft;

[0040] The generator converts the rotating motion of the rotating shaft into electrical energy to power the flow meter.

[0041] Finally, it should be pointed out that the above detailed description of the method and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A flow measurement system for a self-powered long-distance heating pipeline network, characterized in that: include, Heating network (1), branch pipe (2) located on the outer wall of the heating network (1), energy conversion component (3) located inside the branch pipe (2), generator (4) connected to the energy conversion component (3), and flow meter (5) connected to the heating network (1); The branch pipe (2) introduces high-pressure water into the heating network (1), the energy conversion component (3) converts the high-pressure water into energy, and the generator (4) converts the converted mechanical energy into electrical energy for use by the flow meter (5).

2. The self-powered long-distance heating pipeline flow measurement system according to claim 1, characterized in that: The energy conversion component (3) includes a first-stage turbine (31), a second-stage turbine (32), and a third-stage turbine (33) connected in series in the branch pipe (2).

3. The self-powered long-distance heating pipeline flow measurement system according to claim 2, characterized in that: The first-stage turbine (31), the second-stage turbine (32), and the third-stage turbine (33) are all equipped with moving blades (34).

4. The self-powered long-distance heating pipeline flow measurement system according to claim 3, characterized in that: The diameter of the moving blade (34) inside the first-stage turbine (31) is smaller than that inside the moving blade (34) of the second-stage turbine (32).

5. The self-powered long-distance heating pipeline flow measurement system according to claim 2 or 3, characterized in that: The diameter of the moving blades (34) inside the second-stage turbine (32) is smaller than that inside the moving blades (34) of the third-stage turbine (33).

6. The self-powered long-distance heating pipeline flow measurement system according to claim 5, characterized in that: The energy conversion component (3) also includes a rotating shaft (35) that runs through the interior of the first-stage turbine (31), the second-stage turbine (32) and the third-stage turbine (33), with one end of the rotating shaft (35) connected to the generator (4).

7. The self-powered long-distance heating pipeline flow measurement system according to claim 6, characterized in that: The outer wall of the rotating shaft (35) is provided with a bearing bush (351), and the connection between the rotating shaft (35) and the branch pipe (2) is provided with a steam seal (352).

8. The self-powered long-distance heating pipeline flow measurement system according to claim 1, characterized in that: The outer wall of the heating pipeline (1) is provided with an insulation layer (11).

9. A method for measuring the flow rate of a self-powered long-distance heating pipeline network, characterized in that: Including the self-powered long-distance heating pipeline flow measurement system as described in any one of claims 1 to 8, further comprising: High-pressure water from the heating network is introduced into the first-stage water turbine through branch pipes; The first-stage turbine converts fluid energy into mechanical energy, and after the pressure drops, the fluid impacts the second-stage turbine. The second-stage turbine further converts energy, and after the pressure drops further, the fluid impacts the third-stage turbine.

10. The method for measuring the flow rate of a self-powered long-distance heating pipeline network according to claim 9, characterized in that: The third-stage turbine completes the final energy conversion, transferring mechanical energy to the generator through the shaft; The generator converts the rotational motion of the shaft into electrical energy to power the flow meter.

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