JPH02300411A - Perforated intake tower - Google Patents

Abstract

PURPOSE:To eliminate the need of a power source to the intake hole of an intake tower by providing a plurality of intake holes respectively provided with float valves to the tower body and an outer cylinder provided with a screen around the tower body, and then, a projecting section along the inner peripheral surface of the outer cylinder by at least one round. CONSTITUTION:A plurality of intake holes 3 are provided through the side wall of the tower body 2 of this intake tower and screens 3a are fitted to the inlet of each hole 3. A float valve 4 is provided inside the tower body 2 and an outside cylinder 6 is formed of a peripheral side board 6a around the tower body 2. Then a projecting section 7 formed in two stages of an upper and lower sections is formed over the entire internal peripheral surface of the board 6a. When the water level inside and outside the tower body 2 becomes lower, the valve 4a at one of the holes 3 drops together with the float 4c and the inlet 3c of the hole 3 is opened, resulting in flowing-in of warm water into the hole 3 from the surface layer. In such case, flowing-in of water from the lateral direction can be blocked and flowing-in of cold water from a lower layer into the tower body 2 through the hole 3 can also be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a water intake tower consisting of a tower-like structure that takes in hot water from the surface layer of a river, lake, reservoir, etc., and in particular,
Multiple water intake holes drilled at predetermined intervals in the height direction of the water intake tower body are opened and closed automatically using the buoyancy of the water level, without any power, to prevent the intake of water other than hot water from the surface layer. This relates to a perforated water intake tower.

[Conventional technology]

Traditionally, water intake equipment has been used primarily to take hot water from the surface of rivers, lakes, and reservoirs, but also to selectively take water from arbitrary depths to drain the turbid water layer of reservoirs and supply low-temperature water. Sometimes used for.

This water intake equipment includes, for example, a water intake tower with multiple intake holes drilled in the height direction in the tower body, and a water intake tower with an expandable intake pipe that moves up and down at the upper end of the expandable intake pipe to follow fluctuations in water level. There is a water intake device etc.

Among these, for water intake towers that have multiple water intake holes drilled in the height direction of the tower body, each intake hole is equipped with an on-off valve, for example, to prevent the intake of water other than hot water from the surface layer. It has become. The on-off valves provided in these water intake holes are opened and closed manually or by mechanical/electric drive means in accordance with fluctuations in water level.

[Problem to be solved by the invention]

By the way, in order to automatically open and close the on-off valve of the water intake hole, which is perforated in the height direction in the tower body of the water intake tower mentioned above, using mechanical and electrical drive means in accordance with fluctuations in the water level, it is necessary to For example, it requires driving equipment such as a hydraulic cylinder, an electric motor, and an A-type device to detect fluctuations in water level, which requires a large amount of equipment and requires a lot of maintenance.

Furthermore, even if high-performance equipment is used in the mechanism that opens and closes the water intake hole of a water intake tower, the effectiveness of hot water intake in cold regions is extremely low, so the mechanism that opens and closes the water intake hole does not need to have such high performance. .

This invention was devised in view of the above-mentioned problems and to solve the problems.The purpose of this invention is to prevent the intake of water other than surface hot water by reducing the intake tower body. Multiple water intake holes drilled at predetermined intervals in the height direction can be opened and closed automatically without power by using the buoyancy of the water level, eliminating the need for a power source to open and close the water intake holes. Our objective is to provide a porous water intake tower.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a plurality of water intake holes drilled in the tower body of a water intake tower at predetermined intervals in the height direction, so that the water level inside the tower body is Each float valve is installed to open and close each water intake hole by raising and lowering depending on the water level, and an outer cylinder is slidably installed on the outer periphery of the tower body, and the outer cylinder is slidably raised and lowered according to the water level.A screen is installed in the outer cylinder to prevent the float and dust from getting mixed in. In addition, at least one protrusion that is in close contact with the outer circumferential surface of the tower body is formed on the inner circumferential surface of the outer cylinder.

[Operation] The present invention having the above-described configuration operates as follows.

By installing float valves that open and close each water intake hole by raising and lowering them according to the water level inside the tower, the buoyant force acting on the float valves can be used to automatically and automatically take in water. An outer cylinder that opens and closes the hole and that moves up and down according to the water level is slidably provided on the outer periphery of the tower body, and the outer cylinder is provided with an overhang, a float, and a screen to prevent dust, etc. from getting mixed in. This effectively takes in hot water from the surface layer and prevents the water intake hole from being blocked by dust, etc. Furthermore, the protrusion that is in close contact with the outer circumferential surface of the tower body is connected to the inner circumference of the outer cylinder. By applying a small amount of acid to the surface, it acts to prevent low-temperature water in the lower layer from entering the water intake hole.

〔Example〕

Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.

Here, the right half of FIG. 1 is a side sectional view showing a side surface of the water intake tower and the left half is a side sectional view showing a cross section of the water intake tower, and FIG. 2 is an enlarged sectional view of the main part.

In the figure, a water intake tower 1 is provided for the purpose of taking hot water from the surface layer of a reservoir, etc., and is constructed, for example, from the bottom of a river, lake, reservoir, etc. upwards from the water surface. The tower body 2 of the water intake tower 1 is made of a hollow cylindrical structure, and a discharge passage 2a is formed at the bottom of the inside of the tower body 2 to discharge hot water taken into the tower body 2 to the outside. .

A plurality of water intake holes 3 are formed in the side wall of the tower body 2 at predetermined intervals in the height direction of the tower body 2 .

The water intake hole 3 is a hole that passes through the inside of the tower body 2, and is an inflow path when hot water from a surface layer such as a reservoir flows into the inside of the tower body 2. A screen 3a is attached to the mouth of the water intake hole 3 to prevent dust and the like from flowing into the water intake hole 3. The positions of the water intake holes 3 are appropriately shifted by 90 degrees or 180 degrees in the circumferential direction of the tower body 2, and are bored at predetermined intervals in the height direction of the tower body 2.

A water intake hole connecting pipe 3b is connected to the inside of the water intake hole 3. The water intake hole connecting pipe 3b has one end connected to the water intake hole 3 in a substantially horizontal state, is bent downward in the middle, and the water intake hole outlet 3C at the other end faces downward. A valve seat 3d is formed at the opening edge of the water intake hole outlet 3C.

The float valve 4 opens and closes the water intake hole outlet 3C of the water intake hole 3 by rising and falling according to the water level inside the tower body 2, and the valve 4a
, an operating rod 4b and a float 4C. The valve 4a moves up and down to directly open and close the water intake hole outlet 3C, and the periphery of the valve 4a is tapered so as to be in close contact with the valve seat 3d.

An operating rod 4b is connected upward to the center of the valve 4a.

The operating rod 4b is provided facing upward, and its upper end side penetrates the water intake hole connection pipe 3b and projects upward. A sliding tube 3e is connected upward to this upwardly projecting portion, and the operating rod 4b further passes through the inside of this sliding tube 3e. A stopper 3f is provided at the upper end of the sliding tube 3e to prevent the float 4c from lowering.

A float 4 is attached to the upper end of the operating rod 4b that passes through the sliding pipe 3e.
C is installed. Flow) 4c is water intake hole connection pipe 3
A valve 4 is disposed above b, and is raised and lowered by buoyancy acting according to the water level, and is connected via an operating rod 4b.
A is moved up and down to open and close the downward water intake hole outlet 3c. Further, a float protection board 5 is attached above and on the side of the float 4c to protect the float 4C.

The outer cylinder 6 protects the water intake hole 3 from dust and the like and allows the hot water in the surface layer to flow smoothly into the water hole 3, and is slidably provided on the outer periphery of the tower body 2. The outer cylinder 6 is the tower body 2
The outer cylinder 6 is composed of a side circumferential disk 6a that goes around the outer circumference of the outer cylinder 6, and the side circumferential disk 6a of the outer cylinder 6 is spaced apart from the tower body 2 by a constant distance. Side plate 6
The upper end side of a is bent approximately horizontally outward from the tower body 2 to form an overflow plate 6b. The overflow plate 6b functions to effectively take in hot water from the surface layer and to ensure stability when the hot water flows into the water intake hole 3.

A screen 6c is provided at the outer edge of the overflow plate 6b over the entire circumference. This screen 6c functions to prevent the inflow of dust and the like. Furthermore, floats 6d are arranged inside the screen 6C so as to surround the outside of the tower body 2, and this flow 6d is passed through the overflow plate 6b at predetermined intervals.
It is integrally connected to the outer cylinder 6 via a plurality of connecting plates 6e disposed above. The float 6d serves to keep the outer cylinder 6 above the water surface. That is, the outer cylinder 6 is raised and lowered according to the water level by the buoyant force acting on the float 6d, and is always located above the water surface.

The protrusions 7 serve to prevent the low-temperature water in the lower layer from entering the open water intake holes 3, and are provided on the inner peripheral surface of the side plate 6a at locations slightly below each intake hole 3. It is formed protrudingly. The protruding portion 7 is formed around the inner circumferential surface of the side circumferential plate 6a, and is formed in two stages, upper and lower. The amount of protrusion of the protruding portion 7 is such that the outer cylinder 6, which slides up and down on the outer periphery of the tower body 2, does not come into contact with the outer peripheral surface of the tower body 2.

For example, a rubber plate 7a is attached to the protruding tip of the protrusion 7 over its entire circumference. The plate 7a is in close contact with the outer peripheral surface of the tower body 2 to improve watertightness, and the low temperature water in the lower layer is connected to the side plate 6a.
This prevents the water from rising through the gap between the water and the tower body 2 and flowing into the open water intake hole 3.

Furthermore, a plurality of rollers 7b, for example, are attached to the protruding tip of the protruding portion 7 at predetermined intervals over the entire circumference. This roller 7b reduces friction with the outer peripheral surface of the tower body 2, so that when the outer cylinder 6 moves up and down the outer circumference of the tower body 2 following fluctuations in the water level, the raising and lowering is performed smoothly.

Next, the effects based on the configuration of the above embodiment will be explained below.

When the water level inside and outside the tower body 2 falls, the float 4c of the float valve 4 opens and closes the water intake hole 3 located at a certain height of the tower body 2.
is located relatively above the internal water surface,
Flow) No buoyant force acts on 4c. Therefore, the float 4C descends due to its own weight, but the float 4C descends due to its own weight.
Since there is a stopper 3f provided at the upper end of the sliding tube 3e below c, the stopper 3f prevents the float 4c from descending any further once it has descended by a certain height.

On the other hand, when the float 4c descends, the valve 4a connected below it via the operating rod 4b also descends together.

That is, the valve 4a that was in close contact with the valve seat 3d of the water intake hole outlet 3c
descends and leaves the valve seat 3d. Therefore, the water intake hole outlet 3c opens and becomes ready for water intake 1. Therefore, when the water level in a reservoir or the like is higher than the water intake hole 3 located at a certain height in the tower body 2, the hot water in the surface layer is transferred to the water intake hole 3. flows into.

When the hot water in the surface layer passes through the screen 6c, most of the dust and the like floating in the surface layer are prevented by the screen 6C. Then, the hot water that has passed through the screen 6c is guided to the overflow plate 6b below the float 6d and enters the water intake hole 3. Since a screen 3a is provided at the mouth of the water intake hole 3, some dust and the like floating in the hot water that has passed through the screen 6C is prevented by the screen 3a, and only hot water flows into the water intake hole 3. The hot water in the surface layer that has flowed into the water intake hole 3 flows through the water intake hole connection pipe 3b and flows into the inside of the tower body 2 from the water intake hole outlet 3C. Then, the hot water in the surface layer that has flowed into the inside of the tower body 2 is discharged to the outside from the discharge passage 2a at the bottom of the tower body 2.

At this time, water flowing into the water intake hole 3 is prevented from flowing through any path other than the upper overflow plate 6b.

That is, the side peripheral plate 6a below the overflow plate 6b goes around the outside of the tower body 2, and prevents water from flowing in from the side. Further, on the inner peripheral surface of the side peripheral plate 6a at a location slightly below the water intake hole 3, two protrusions 7 are formed vertically, and a rubber plate 7a is provided at the tip of each of the upper and lower protrusions 7. is in close contact with the outer circumferential surface of the tower body 2 and closes the gap between the side peripheral plate 6a and the tower body 2.

Therefore, the low-temperature water in the lower layer that is about to rise from the lower part of the outer cylinder 6 through the gap between the side circumferential plate 6a and the tower body 2 and flow into the water intake hole 3 is ensured by these upper and lower protrusions 7 to rise. This prevents low-temperature water in the lower layer from flowing into the tower body 2 through the water intake hole 3.

On the other hand, when the water level inside and outside the tower body 2 rises, the tower body 2
Float valve 4 that opens and closes the water intake hole 3 located at a certain height
The float 4C is located relatively below the water level inside the tower body 2, and buoyancy acts on the float 4c. Therefore, the float 4C rises.

When the flow rate 4C rises, the valve 4a connected below it via the operating rod 4b also rises together. The rising valve 4a is the valve seat 3 of the water intake hole outlet 3C above it.
d and close the water intake hole outlet 3C. This makes water intake impossible.

In this way, the water intake hole 3 is opened and closed automatically without power by the buoyant force acting on the float 4C of the float valve 4.

It should be noted that this invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As is clear from the description in 1- below, the multi-hole water intake tower according to the present invention is equipped with float valves that open and close each intake hole by moving up and down according to the water level inside the tower body. Because of that, Fu [1
- The water intake hole can be opened and closed automatically without power by using the buoyant force acting on the gutter valve. Therefore, a drive device for opening and closing the water intake hole can be eliminated, and a power source for driving the drive device can also be eliminated, making it possible to reduce equipment costs and maintenance costs.

In addition, an outer cylinder that moves up and down according to the water level is slidably installed on the outer periphery of the tower body, and a screen is installed on the outer cylinder to prevent the float and dust from entering. It is possible to prevent the water from flowing in, prevent the water intake hole from being blocked by debris, etc., and prevent water from being taken in, and maintain smooth water intake.

In addition, since the protrusion that is in close contact with the outer circumferential surface of the tower body is formed at least once around the inner circumferential surface of the outer cylinder, the gap between the outer cylinder and the tower body of the water intake tower is reduced by the protrusion that is in close contact with the outer circumferential surface of the tower body. It is possible to prevent low-temperature water in the lower layer from rising and entering the water intake hole, and it is possible to maintain hot water intake from the surface layer, which is an extremely novel and beneficial effect.

[Brief explanation of drawings]

The drawings show an embodiment of the porous water intake tower according to the present invention, in which the right half of FIG. 1 shows a side surface of the water intake tower and the left half shows a side sectional view without showing the cross section of the water intake tower, and FIG. is an enlarged sectional view of the main part. [Explanation of symbols] 1: Water intake tower 2: Tower body 2a: Discharge passage 3: Water intake hole 3a; Screen 3b: Water intake hole connection pipe 3c: Water intake hole outlet 3d: Valve seat 3e: Sliding pipe 3f; Stopper 4: Float Valve 4a; Valve 4b: Operating rod 4c: Float 5: Float protection plate 6: Outer cylinder 6a: Side circumferential plate 61): Overflow plate 6C Niscreen 6d: Float 6e: Connection plate
7: Projection 7a: Rubber plate 7b; Roller patent applicant
Nishida Iron Works Co., Ltd. Agent Patent Attorney Tadashi Harasaki Figure 1

Claims (1)

[Claims] 1. A plurality of intake holes are drilled in the tower body of the water intake tower at predetermined intervals in the height direction, and each is equipped with a float valve that opens and closes each intake hole by raising and lowering according to the water level inside the tower body. An outer cylinder that can be raised and lowered accordingly is slidably installed on the outer periphery of the tower body, and a screen is provided on the outer cylinder to prevent floats and dust from getting mixed in, and a protrusion that comes into close contact with the outer peripheral surface of the tower body is installed on the inner periphery of the outer cylinder. A porous water intake tower characterized by having at least one circumference formed on its surface.