JP2016226136A - Thermal power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal power plant requiring no power cable for supplying a fluid measurement device for measuring a fluid flowing through a pipe with power.SOLUTION: The thermal power plant includes: a pipe 7 inside which a fluid flows; a rotary member 9 provided inside the pipe 7; a power generator 10, provided outside the pipe 7, directly connected to the rotary member 9; and a measurement device 12 connected to the power generator 10, for measuring at least one of fluid pressure, temperature, and a flow rate by being supplied with power from the power generator 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thermal power plant, and more particularly to a thermal power plant including a measuring device that measures a fluid flowing inside a pipe.

  Attempts have been made to change the energy of the fluid flowing in the piping to electrical energy without wasting it. For example, Patent Document 1 describes a generator in which spiral blades are attached to the inside of a nozzle connected to a water pipe and use the pressure of tap water flowing through the nozzle. Patent Document 2 describes a pipe joint in which a generator that generates electricity by a water flow is incorporated in a pipe through which water flows. Patent Document 3 discloses a fluid measuring device including a generator driven by an impeller that converts kinetic energy of a fluid flowing in a pipe into a rotary motion, and a driving body that is displaced by pressure energy of the fluid flowing in the pipe. A fluid measuring device is described that includes a generator driven by a crank mechanism that converts displacement motion into rotational motion.

Japanese Patent Laid-Open No. 11-037036 JP 2002-266742 A JP-A-8-122109

  In general, piping in a thermal power plant is provided with a device for measuring fluid (hereinafter referred to as “fluid measuring device”) such as a pressure measuring device, a temperature measuring device, and a flow rate measuring device. The pressure, temperature, flow rate, and the like of the fluid flowing through the inside are measured. 2. Description of the Related Art Conventionally, a fluid measuring apparatus is operated with a power cable connected thereto and power supplied from an external power supply through the power cable. For this reason, in a conventional thermal power plant, it is necessary to lay a power cable for the operation of the fluid measuring device, and it is necessary to secure a space for laying the power cable, purchase a power cable, and install the power cable. There is a problem that it takes time and cost to install the fluid measuring device. In addition, since it is not easy to lay a power cable in high places and narrow parts, there is also a problem that the arrangement of the fluid measuring device is spatially restricted in the conventional thermal power plant considering the laying of the power cable.

  An object of the present invention is to provide a thermal power plant that does not require a power cable for supplying power to a fluid measuring device that measures fluid flowing in a pipe.

  The thermal power plant according to the present invention includes a pipe through which a fluid flows, a rotating member provided inside the pipe, a generator provided outside the pipe and directly connected to the rotating member, and the generator And a measuring device that is supplied with electric power from the generator and measures at least one of pressure, temperature, and flow rate of the fluid.

  ADVANTAGE OF THE INVENTION According to this invention, the thermal power plant which does not require the power cable for supplying power to the fluid measuring device which measures the fluid which flows through piping can be provided.

The schematic diagram which showed schematic structure of the thermal power plant by the Example of this invention. The figure which shows the water wheel and generator provided in piping.

  A thermal power plant according to the present invention includes a pipe through which a fluid flows, a fluid measuring device that measures the fluid flowing through the pipe (a device that measures at least one of the pressure, temperature, and flow rate of the fluid), and the inside of the pipe. And a generator connected to the rotating member. The rotating member and the generator convert the kinetic energy of the fluid flowing inside the pipe into electrical energy. The fluid measuring device is connected to a generator without using a power cable, and power for operation is supplied from the generator.

  The thermal power plant according to the present invention does not need to lay a power cable for supplying power to the fluid measuring device provided in the piping, and does not require a power cable laying space, purchase of a power cable, and power cable laying work. The time and cost required for installing the fluid measuring device can be reduced. In addition, since the thermal power plant according to the present invention can arrange the fluid measuring device without considering the laying of the power cable, the fluid measuring device can be installed in a high place and a narrow part where the laying of the power cable is not easy. The power can be easily supplied to the fluid measuring device installed in such a place.

  Below, the thermal power plant by the Example of this invention is demonstrated with reference to drawings.

  FIG. 1 is a schematic diagram showing a schematic configuration of a thermal power plant according to an embodiment of the present invention. FIG. 1 shows a steam power plant as an example.

  The steam power plant includes a boiler 1, a turbine 2, a generator 3, and a condenser 4. The boiler 1 heats and vaporizes water to generate steam. The steam generated in the boiler 1 reaches the turbine 2 through the pipe 6. The turbine 2 is rotated by steam. The generator 3 is connected to the turbine 2 coaxially, and the rotational force of the turbine 2 is propagated to generate power. The condenser 4 condenses the steam that has passed through the turbine 2 into water. The water condensed in the condenser 4 returns to the boiler 1 from the pipe 7 via the pump 5 and the pipe 8 and circulates again.

  The pipe 6 connects the boiler 1 and the turbine 2, the pipe 7 connects the condenser 4 and the pump 5, and the pipe 8 connects the pump 5 and the boiler 1. The pipe 6 is a gas pipe through which steam flows, and the pipes 7 and 8 are aqueous pipes through which water flows.

  A water wheel 9 is provided as a rotating member inside the pipe 7, and a generator 10, a battery 11, and a fluid measuring device 12 are provided outside the pipe 7. A generator 10 is directly connected to the water wheel 9. A battery 11 is directly connected to the generator 10. A fluid measuring device 12 is directly connected to the battery 11. A power cable is not used to connect the water turbine 9, the generator 10, the battery 11, and the fluid measuring device 12. The water turbine 9 is a generator 10, the generator 10 is a battery 11, and the battery 11 is a fluid measuring device 12. Each is directly connected to each other. The direct connection method of these devices (the method of transferring electricity between the devices) is arbitrary.

  The fluid measuring device 12 is a device that measures the fluid flowing inside the pipe 7, and is, for example, a pressure measuring device, a temperature measuring device, or a flow rate measuring device. The pressure measuring device measures the pressure of the fluid, the temperature measuring device measures the temperature of the fluid, and the flow rate measuring device measures the flow rate of the fluid. The fluid measurement device 12 may be a device that measures any one of the pressure, temperature, and flow rate of the fluid, but may be a device that measures at least one of these.

  The water wheel 9 is rotated by the kinetic energy of the water flowing inside the pipe 7. The generator 10 generates electric power by converting kinetic energy generated by the rotation of the water wheel 9 into electric energy, and supplies the generated electric power to the battery 11. The battery 11 stores the electric power supplied from the generator 10 and supplies the electric power stored in the fluid measuring device 12 directly connected thereto. The fluid measuring device 12 operates with electric power supplied from the battery 11 and measures at least one of the pressure, temperature, and flow rate of the water flowing inside the pipe 7. By providing the battery 11, the electric power generated by the generator 10 can be stably supplied to the fluid measuring device 12.

  In this way, the fluid measuring device 12 can obtain an operation power source from the kinetic energy of the water wheel 9. Since an external power supply device (a power supply device installed at a location distant from the fluid measurement device 12) is not used to supply operation power to the fluid measurement device 12, the fluid measurement device 12 is connected to the external power supply device. No power cable is required. Therefore, in the thermal power plant according to the present invention, the laying of the power cable is unnecessary, and the laying space of the power cable, the purchase of the power cable, and the laying work of the power cable are all unnecessary. Further, since the thermal power plant according to the present invention does not require a power cable, the fluid measuring device 12 can be installed in a high place and a narrow part where it is not easy to install the power cable. It is possible to easily supply power to the fluid measuring device 12 installed in such a place where it has not been easily supplied.

  FIG. 2 is a view showing a water wheel 9 and a generator 10 provided in the pipe 7. In FIG. 2, the battery 11 and the fluid measurement device 12 are omitted. In the present embodiment, the water wheel 9 is a Darius-Savonius type water wheel in which a Darius type water wheel and a Savonius type water wheel are combined. The water turbine 9 and the generator 10 are connected to each other by a rotating shaft 23. The rotating shaft 23 passes through the pipe 7 and directly connects the water wheel 9 and the generator 10. A mechanical seal 24 is provided in the penetrating portion of the rotating shaft 23 of the pipe 7 to prevent water from leaking from the penetrating portion to the outside of the pipe 7.

  The Darius-Savonius type turbine has the following advantages. One is that it can rotate at low speed (small kinetic energy). The other is that the rotating shaft can be installed perpendicular to the fluid flow, which simplifies the apparatus. In the type of water turbine in which the rotating shaft is installed in parallel to the fluid flow, it is necessary to install a generator inside the pipe 7, and considerations such as the generator seal and the connection method between the generator and the battery There is concern about the increase.

  When the water wheel 9 is rotated by the water flow inside the pipe 7, the rotating shaft 23 rotates. When the rotating shaft 23 rotates, the rotational force of the water wheel 9 propagates to the generator 10. The generator 10 generates power by the rotational force of the water wheel 9 propagated by the rotating shaft 23.

  As described with reference to FIG. 1, the generator 10 supplies the generated power to the battery 11 that is directly connected, and the battery 11 supplies the power to the fluid measuring device 12 that is directly connected. The fluid measuring device 12 operates with electric power supplied from the battery 11. In this way, the fluid measuring device 12 is supplied with power for operation from the generator 10 connected without using the power cable.

  In the present embodiment, a water system pipe is taken as an example of the pipe 7 provided with the rotating member (water wheel 9). The present invention can be applied not only when the pipe provided with the rotating member is a water-based pipe but also when the pipe is a gas pipe through which steam or air flows. In this case, a windmill is used instead of the water wheel 9 as a rotating member provided inside the pipe. In the present embodiment, a Darrieus-Savonius-type turbine is used as the turbine 9 as an example. However, the turbine and windmill used as the rotating member are not limited to the Darius-Savonius-type, and other types may be used. .

  Moreover, although the steam power plant was mentioned as an example in the present Example as a thermal power plant, this invention is applicable also to gas turbine power generation and combined cycle power generation. Furthermore, the present invention can be applied to nuclear power generation and the like.

  DESCRIPTION OF SYMBOLS 1 ... Boiler, 2 ... Turbine, 3 ... Generator, 4 ... Condenser, 5 ... Pump, 6, 7, 8 ... Pipe, 9 ... Water wheel, 10 ... Generator, 11 ... Battery, 12 ... Fluid measuring device, 23 ... Rotating shaft, 24 ... Mechanical seal.

Claims (5)

Piping through which fluid flows,
A rotating member provided inside the pipe;
A generator provided outside the pipe and directly connected to the rotating member;
A measuring device connected to the generator and supplied with electric power from the generator to measure at least one of pressure, temperature and flow rate of the fluid;
A thermal power plant comprising: The rotating member and the generator are connected to each other by a rotating shaft,
The rotating shaft rotates when the rotating member rotates,
The generator generates electricity when the rotating shaft rotates.
The thermal power plant according to claim 1. The rotating member is a water wheel or a windmill combining a Darrieus type and a Savonius type.
The thermal power plant according to claim 1. A battery provided outside the pipe and further directly connected to the generator and the measuring device;
The battery is powered by the generator,
The measuring device is supplied with power from the battery,
The thermal power plant according to claim 1. The rotating shaft passes through the pipe to connect the rotating member and the generator,
A mechanical seal is provided in a through portion of the rotating shaft of the pipe.
The thermal power plant according to claim 2.

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