JPS58195075A - Water turbine power generating apparatus installed to gate - Google Patents

Abstract

PURPOSE:To easily perform maintenance and inspection work further discharge water always to the downstream side, by installing a generator and water conduit external pipe to the outside of a water conduit region while communicating a water conduit of the water conduit external pipe to a draft water conduit when a gate closes an open water conduit. CONSTITUTION:A generator 40 and a water conduit external pipe 14 are externally installed of a water conduit region to the outside of a gate 12, and a bottom end opening of the pipe 40, when the gate 12 closes an open water conduit 11, is water-tightly contacted with a start end part 51c of a draft water conduit 50, extensibly provided to a bed of the conduit 11 and guiding a water conduit to the downstream side of the conduit 11, then the water conduit in the pipe 14 is communicated to the conduit 50. In this way, even at repair work when a water turbine geneating unit 10 is in failure, the unit 10 can be lifted with the gate 12 above a surface of water to ensure a responsible discharge of water to the downstream side, further easy access to each equipment set to the peripheral area of the water conduit external pipe can facilitate maintenance and inspection work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water turbine power generating device that is mounted on a gate that partitions an irrigation canal in the form of a groove so that it can be raised and lowered integrally with the gate, and in particular secures irrigation water for the downstream side of the canal. In cases where continuous water discharge is required for the purpose of construction, it is possible to ensure the discharge of water even during the period of inspection and repair of the water turbine generator, and it is easy to inspect and maintain without compromising the strength of the gate. It is designed to omit civil engineering equipment such as.

The development of currently untapped hydropower energy is a major issue, as there is a desire to conserve energy resources. In order to meet these demands, hydropower energy development sites are targeted at locations with extremely low heads, such as medium and small rivers, existing dam tailrace channels, and m-division waterways. Since gate-type valve generators are effective for generating hydroelectric power with this ultra-low head, they are likely to be widely adopted in the future. In conventional cylindrical water turbine power generating equipment such as the one disclosed in Japanese Patent Application Laid-Open No. 55-139979, the outer casing is attached to the gate, and the outer periphery of the outer casing and the water turbine generator body containing the generator are immersed in water, increasing the strength of the gate. This often results in damage, making gate design difficult and requiring maintenance of parts installed on the outer periphery, such as the guide vane operating mechanism, during operation.

For inspection, a water barrier wall is placed on the side of the discharge channel downstream from the water intake gate, and a water turbine bit for maintenance and inspection is defined as a water-free space between the water barrier wall and the gate below the ice barrier wall. In addition, it required drainage pits and spillways, which required civil engineering costs and construction time, making the water turbine power generation equipment costly.

The present invention eliminates the above-mentioned drawbacks, makes it easy to assemble and disassemble water power generation equipment, eliminates the need for civil engineering equipment, and allows maintenance of operating mechanisms such as the generator and guide vanes by approaching the water turbine even during operation.
The purpose of the present invention is to provide a gate-loaded water turbine power generation device that can be inspected, always discharges water downstream as Uranami water, and can be used for existing gates without damaging the gates.

The gate-loaded water turbine generator of the present invention has an outer waterway tube whose upper part opens through the partition wall of the gate, the other part extends vertically along the partition wall of the gate, and whose lower end opens downward. , a water channel inner tube that penetrates the upper part of the outer tube and is supported inside the outer tube via a steven, and a drive shaft that is inserted into the inner tube and rotatably supported at the terminal end of the inner tube. and an axial water turbine runner attached to the lower end of the drive shaft.
A generator coupled to a drive shaft is provided above the waterway outer pipe, and when the gate closes the open waterway, a lower end opening of the waterway outer pipe is a starting end of a suction waterway that penetrates the floor of the open waterway. The waterway inside the waterway outer pipe and the suction waterway are formed so as to communicate with each other in a water-sealing manner, and this configuration achieves the above-mentioned purpose.

Furthermore, in the present invention, if the upper part of the outer water pipe is constructed separately from the other parts of the outer pipe, it is effective in facilitating the handling and installation, and Providing a flow rectifier is effective in rectifying the flowing water into the outer pipe of the waterway. Furthermore, supporting the waterway inner pipe on the waterway outer pipe via a stay pen allows the waterway inner pipe to be formed into a rigid body, especially when the waterway outer pipe to which the steven is attached is constructed separately from other parts of the outer pipe. , convenient to easily connect the waterway inner tube to the steven. It is also advantageous to integrate a differential user pipe into the lower end of the outer water channel pipe for reducing the absolute velocity of the water exiting the axial water turbine runner.

By forming the lower part of the waterway outer pipe and the starting end of the suction waterway into flange shapes, and providing a water seal backing on one of them, a passage for water flowing through the turbine will be formed when the gate is closed, even if there is some installation error. This provides significant operational advantages.

In addition, to seal the drive shaft that connects the water turbine and the generator, a rotatable water seal is provided between the lower end of the waterway inner pipe and the turbine runner, and water leaking into the waterway inner pipe is discharged to the outside. By providing a drain pipe for this purpose, smooth rotation of the drive shaft can be ensured at all times without impairing the durability of the bearing and the drive shaft. As an alternative to this, the upper end portion of the waterway inner pipe is configured separately from the other portions of the inner pipe and is flange-connected to the other portions,
The lower end portion extends to the lower end of the fixed portion of the generator to seal the lower end, and when the drive shaft and the movable portion of the generator are coupled within the extending upper end portion, the water seal is quickly formed by static sealing. It is possible to avoid rotation □ during rotation sealing wear, etc.

The water pressure applied to the water wheel runner is preferably supported by the lower end of the channel inner pipe, thereby preventing thrust force from being applied to the drive shaft.

The structure of the gate-loaded water turbine power generator of the present invention will be explained below. 1 and 2 show embodiments of the invention,
FIG. 1 is a plan view of the gate-loaded water turbine generator, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1.

In the figure, reference numeral 11 indicates an open channel through which water flows in the direction of syncope. Reference numeral 12 denotes a gate that partitions the open channel and is installed to be able to move up and down in the direction of arrow 13 via a wire drum 12c and a guide roller 12d, and 10 is a water turbine generator.
A waterway outer pipe 14 is fixed to the gate 12. This waterway outer pipe 14 includes an inlet pipe 101, an upper body pipe 102. Lower body pipe 10
3 and a runner outer tube 104. A bent part 101a is formed in the inlet pipe 101, and a water regulating fluid 101b is provided inside this bent part, and an open part 101c on the water intake side penetrates the partition wall 12b of the gate, and the upstream part of the open channel is It is attached to the partition membrane 12b of the gate toward the side in a water-sealing manner, and the side opposite to the water intake side is attached to the partition wall 12 of the gate.
The wound portion extends vertically along the direction b and is fixedly supported by the reinforcing frame 12a of the partition wall 12b via the support member 15.

The upper body pipe 102 is arranged vertically along the partition wall 12b of the gate, and a flange 16a at one end thereof is coupled to the inlet pipe 101 in a hydraulic manner via a lower end flange 16b of the inlet pipe 101, and a flange 17a at the other end. is connected to the lower body tube 103 through a flange 176 at one end of the lower body tube 103 in a water-sealing manner. The lower body pipe 105 is the Steben 31
The flange 186 at the lower end is connected to the drum-shaped runner outer tube 104 through its upper 7 flange 18b in a water-sealing manner. The runner outer tube 104 has a flange 20 on its upper part, and its body is fixedly supported by a reinforcing frame 124 of the partition wall 12b via a support member 19. As described above, the water channel outer pipe 14 is formed, and the lower part thereof is formed as a discharge ring with a thickened tip.

The inner waterway pipe 50 is the above-mentioned inlet pipe 10 at the upper part of the outer waterway pipe 14.
1 is inserted inside the vertical part of the waterway outer pipe 14 from above,
The lower part is supported by the lower body pipe 103 of the waterway outer pipe 14 via the steven 31, and the intermediate part is supported by the upper body pipe 102 of the waterway outer pipe via the stay 32. A movable guide vane 33 is supported by the lower end of the stay pen 31 of the water channel inner pipe 30 and the runner outer pipe 104. Further, the upper end of the waterway inner pipe 30 is connected to the inlet pipe 10.
A flange 54 is provided on the head part of the head part 1, protruding from the upper part of the head part 1.

A drive shaft 35 is inserted inside the waterway inner pipe 30, and a main shaft bearing 36 and an intermediate shaft bearing 37 loaded at the lower end of the waterway inner pipe 30 are inserted.
It is rotatably supported by the water channel inner pipe 60.

The lower end of the drive shaft 35 protrudes downward from the lower end of the inner pipe 50, and an axial water turbine runner 38 is attached to the protrusion. The axial water turbine runner 38 is surrounded by the runner outer pipe 104 of the waterway outer pipe 14, and the water pressure applied to the runner is supported by the lower end of the waterway inner pipe 50. Also,
A backing (not shown) provides a water seal between the lower end surface of the water channel inner pipe 30 and the upper end surface of the runner boss. A book whose drain pipe (not shown) has leaked water into the waterway inner pipe 30 is removed from the runner cone 38a.
It is arranged so that it can be discharged.

The generator 40 is installed on a cylindrical pedestal 39 provided on the above-mentioned inlet pipe 101 of the waterway outer pipe 14, and is attached to the reinforcing frame 12a of the partition wall 12b via the support member 41. part is fixedly supported.

A rotating shaft 40a of the generator 40 is coupled to a drive shaft 35.

The suction waterway 50 penetrates the floor of the open waterway 11 and guides the waterway to the downstream side of the open waterway 11, and the suction pipe 51 is buried in the floor concrete of the open waterway. This suction pipe 5
The starting end opening 51c on the upstream side of 1 is provided with a flange 51a, and a backing 51b is loaded on the flange surface as shown in FIG.

When the open waterway 11 is closed by the gate 12, the flange 20 of the lower end opening 104a of the runner outer pipe 104 of the waterway outer pipe 14 and the flange 51a of the suction pipe starting end opening 51c come into contact, and the waterway outer pipe 14 and the suction waterway 50 will now be in communication.

Next, an outline of the operation system of the above-mentioned gate-loaded water turbine generator will be explained. Water turbine generator.

goes down with gate 12, and from gate 12 open channel 1
1 water is dammed up. The flange 20 of the runner outer tube lower end opening 104a of the waterway outer pipe 14 and the flange 51a of the suction pipe starting end opening 51C are in water-sealing contact via the backing 51b, and the waterway outer pipe 14 and the suction waterway are connected. It goes through. The amount of water in the open channel 11 is increased so that a predetermined amount of water is always taken into the water turbine generator 10. The water level of the open channel changes between 12a, which is higher than the entrance pipe opening portion 10C of the outer waterway pipe 14, and 12b, which is lower than the partition wall 12b of the gate. On the other hand, water is taken into the water turbine generator 10 from the inlet pipe opening 101c of the waterway outer pipe 14.
Water flowing in from 1c is made to flow between the water channel outer pipe 14 and the water channel inner pipe 30 by a flow regulator 101b arranged inside the bent portion 101a of the inlet pipe. Stay pen 3 of waterway inner pipe 30
The movable guide vanes 33 supported by the runner outer tube 104 and the runner outer tube 104 are automatically operated via an electric motor (not shown) from above outside the waterway area, so that the water turbine generator 10 operates at the best efficiency. The opening degree will be adjusted so that the The water flowing between the outer waterway pipe 14 and the inner waterway pipe 30 passes through the movable guide vane 35 and hits the axial water turbine runner 38. The water pressure applied to the bearing-type water turbine runner 38 is transferred to the waterway outer pipe 14 via the Steben 31 and the stay 37.
The runner boss and both end surfaces of the lower end of the waterway inner pipe 50 are sealed with water. The drive shaft 35 rotates smoothly together with the axial water turbine runner 38, and the rotating shaft 40 of the generator is rotationally driven to start power generation.

On the other hand, the flowing water that hits the axial type water turbine runner 38 and falls downward is guided to a suction pipe that communicates with the runner outer pipe 104 of the waterway outer pipe 14, reduces the flow velocity, and flows to the downstream side of the open waterway 11. It flows out.

From the above, the gate-loaded water turbine generator 10 of the present invention discharges irrigation water to the downstream side of a channel that is always open, and even in the event of an accident or repair of the generator, the gate-loaded water turbine generator 10 can be used together with the gate.
By hoisting 0 above the water surface, responsible discharge to the downstream side can be ensured. Moreover, in the event of a flood, the water turbine generator 10 can be lifted together with the gate to increase the discharge amount.

Since the generator 40 and the waterway outer pipe 14 are located outside the waterway area, it is easy to approach the generator, guide vane operating mechanism, and other equipment installed around the outer waterway pipe and freely maintain and inspect them even during operation. I can do it. Furthermore, it becomes possible to design and manufacture a compact water turbine generator using relatively lightweight members without impairing the strength of the gate. Another embodiment of the present invention is shown in FIG. 4, which is a longitudinal sectional view of the lower end of the generator. In the drawings, the same components as those shown in FIGS. 1 and 2 are given the same reference numerals, and their explanations will be omitted. The upper end of the water channel inner pipe 30 extends to the lower end of the generator 40, and a shaft casing 42 is disposed in the extended portion, and is inserted into the co-rotating shaft portion 40a of the generator 40. The shaft casing 42 has a packing 44 at its upper end to rotatably seal the rotating shaft 40a against water, and its lower end is connected to the water channel inner pipe 60 via the flange 34 and flange 43 at the upper end of the water channel inner pipe 30. ing. Inside the shaft casing 42, a rotating shaft 40a of the generator 40 has a flange 45a at its lower end and is coupled to the drive shaft 35 via a flange 45b.

As a result, when installing the generator 40, centering of the drive shaft 35 and the generator rotating shaft 40a can be easily performed, and the drive shaft 35 can be easily aligned.
The rotation of the generator 40 smoothly drives the generator 40 to rotate. A shaft casing 42 extends to the lower end of the generator 40 and
By rotatably sealing 0a with water, it is possible to prevent water in the waterway inner pipe 30 from entering the generator 40.

As mentioned above, the gate-loaded water turbine generator of the present invention is compactly designed using relatively lightweight members. It is manufactured and loaded onto the gate without compromising the strength of the gate, is easy to assemble and disassemble, and does not require any civil engineering installation, and can be easily accessed during operation to maintain and inspect the operating mechanism of the generator and guide vanes. is possible. In addition, it is possible to provide a gate-loaded water turbine generator that can be used to discharge water for irrigation to the downstream side at all times, reducing production costs and shortening the construction period, and that can be loaded into existing gates.

[Brief explanation of the drawing]

Embodiments of the present invention are shown in FIGS. 1, 2 and 3,
Figure 1a is a plan view of the gate-loaded water turbine generator, Figure 1b
is a configuration diagram of the main parts inside the waterway outer pipe in Fig. 1a, Fig. 2 is a sectional view taken along line A-A in Fig. 1a, Fig. 3 is a detailed view of section P in Fig. 1, and Fig. 4
This figure shows another embodiment of the present invention, and is a longitudinal cross-sectional view of the main part of the lower end Q section of the generator shown in FIG. 1. 10: Gate-loaded water turbine generator, 11: Open channel, 12:
Gate, 12b: Gate partition wall, 14: Waterway outer pipe,
30: Channel inner pipe, 31: Steben, 35: Drive shaft, 3
8: Axial water turbine runner, 40: Generator, 44, 51
b: packing, 50: suction waterway, 51c: starting end of suction waterway, 101b: flow regulation of waterway, 104a: lower end opening of waterway outer pipe.

Claims (1)

[Scope of Claims] 1) A water turbine power generation device that is integrally mounted on a gate that partitions an open waterway in the form of a groove so that it can be raised and lowered;
A waterway outer pipe whose upper part is formed as a bent part that penetrates the partition wall of the gate and opens to the upstream side of the open waterway, and whose remaining part extends almost vertically and whose lower end is formed to open downward. and a water channel inner tube that penetrates the upper part of the outer tube from above and is attached to the outer tube so that its lower end terminates within the outer tube, and is inserted into the inner tube and is rotatable by the terminal end of the inner tube. a guide-supported drive shaft; an axial water turbine runner attached to the lower end of the drive shaft; a generator; when the gate closes the open channel, the lower end opening of the outer channel pipe is connected to the starting end of the suction channel that penetrates the floor of the open channel and leads the channel to the downstream side of the channel; A gate-loaded water turbine power generation device characterized in that the water channel in the water channel outer pipe and the suction water channel are in sealing contact with each other so as to communicate with each other. 2. In the water turbine power generating device according to claim 1, the upper part of the outer water pipe is constructed separately from the remaining part of the outer pipe, and the upper part and the remaining part are joined by a flange in a water-sealing manner. A gate-loaded water turbine power generation device characterized by: 3) A gate-loaded water turbine power generation device according to claim 1 or 2, characterized in that a water flow regulator is provided at a bent portion within the upper portion of the outer waterway pipe. 4) A gate-loaded water turbine power generation device according to claim 1, wherein the waterway inner pipe is supported by the waterway outer pipe via a steven. 5) In the water turbine generator set forth in claim 4, the portion of the waterway outer tube to which the stay pen is attached is configured separately from other portions and is flange-bonded to the other portions in a water-sealing manner. A gate-loaded water turbine generator featuring: 6) The gate-loaded water turbine power generation device according to claim 1, wherein the lower end of the waterway outer pipe is configured as a differential user pipe. 7) The water turbine power generation device according to claim 1, characterized in that the lower part of the outer water pipe and the starting end of the suction waterway are each formed in a flange shape, and at least one of them is provided with a water seal backing. Gate-loaded water turbine generator. 8) A gate-loaded water turbine power generation device according to claim 1, characterized in that a water seal is rotatably sealed between the lower end of the waterway inner pipe and the submersible runner◇ 9) 9. The gate-loaded water turbine power generation system according to claim 8, wherein the waterway inner pipe is provided with a drain pipe for discharging water leaking into the inner pipe to the outside. 10) In the water turbine power generation device according to claim 1, the upper end portion of the pipe within the waterway extends to the lower end of the fixed portion of the generator and is coupled to the lower end in a hydraulic manner, and 1. A gated water turbine power generating device characterized in that a drive shaft and a movable part of a generator are coupled within the extending upper end portion of the pipe. 11) In the water turbine power generation device according to claim 10, the extending upper end portion of the inner tube of the waterway is configured separately from the other portion of the inner tube, and has a hydraulic seal with the other portion. A gate-loaded water turbine generator characterized by being lung-coupled. 12. The gate-loaded water turbine power generation device according to claim 1, wherein the water pressure applied to the water turbine runner is supported by the lower end of the waterway inner pipe.