JPH0214483B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floating pier, and more particularly, to an improvement of a floating pier for dust removal disposed at a water intake of a dam.

[Prior art]

Traditionally, dam water intakes have been equipped with floating piers known as aba to prevent debris such as driftwood, twigs, and fallen leaves from flowing into the water.

By the way, as shown in Fig. 5, this floating pier is constructed by installing a pier body 5 consisting of floats 4 on guide rails 3, 3 arranged along both sides of a water intake 2 opened in a water intake tower 1 at a height above the water surface. The pier body 5 is attached so as to be slidably movable according to the requirements, and a screen member 6 for dust removal is arranged on each side of the pier body 5.

[Problem that the invention seeks to solve]

However, if the water surface of the dam where this type of dust removal floating pier is installed freezes in winter, the frozen water surface A and floating pier B will initially become one, as shown in Figure 6. (Figure 6a), when the water level falls, floating pier B rises from the unfrozen water surface along with frozen water surface A (Figure 6b), and eventually falls to the water surface due to ice melting due to rising temperatures or the weight of floating pier B itself. There were inconveniences such as damage to the guide rail, main body float, or screen member.

Therefore, in order to avoid such inconvenience, methods have been adopted such as raising the floating pier on land and storing it during the winter when the water surface freezes, and then reinstalling it once the freeze has cleared. There were various problems such as not only the cost of maintaining and managing the pier was high but also the work was complicated.

[Means for solving problems]

Therefore, in order to solve the above-mentioned problems, the present invention includes a water storage tank set to a predetermined capacity in the main body of the floating pier, and a submersible pump device for discharging the water stored in the tank to the water storage tank. An air pipe that extends upward and communicates with the atmosphere even when submerged is attached, and one or more auxiliary floats are detachably installed on the pier body to maintain the floating pier at a predetermined water level when submerged. By keeping the entire floating pier submerged at a predetermined depth when the pier freezes, damage to the pier is prevented and maintenance management is simplified.

[Effect]

In the floating pier according to the present invention, when the water surface freezes, external water is injected into the water storage tank to maintain the floating pier itself under the water surface, and when the water surface is thawed, the water in the water tank is drained and floated. use.

〔Example〕

Next, preferred embodiments of the floating jetty for dust removal according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience of explanation, the same reference numerals will be used for the same components as those of the conventional floating pier.

1 to 3, the floating pier according to the present invention has a pier main body 5 with a substantially U-shaped plane that is slidably attached to the guide rails 3, 3 of the water intake 2. At predetermined locations of the float body 4 constituting the main body 5, that is, in the vicinity of each corner of the main body 5 in this embodiment, water storage tanks 10 and 12, each having a predetermined capacity based on the weight of the floating pier, are placed facing each other. and install it.

Each of the water storage tanks 10 and 12 includes, for example,
Air pipe 14 set to a length of about 2.5m,
16 and these water storage tanks 14,
16 communicate with each other via a water pipe 18. Furthermore, a submersible pump device 20 for drainage is attached to one of the water storage tanks 10, and a drain pipe 22 connected to a discharge port of this pump device 20 is extended to the outside.

In addition, a water storage tank 1 is installed at a predetermined location on the top of the main body 5.
0, 12 and the inspection manhole 24 of the submersible pump device 20, and a mounting member 32 for locking a locking tool 30 (see FIG. 3) provided at the end of the locking string 28 of the auxiliary float 26. ing.

Next, the operation of the floating pier according to the present invention constructed as described above will be explained.

First of all, normally, that is, when the water surface does not freeze, the floating pier is operated by the floating body 4 in the same way as a conventional floating pier.
Due to the buoyancy of the water, it slides and floats along the guide rails 3, 3 according to the water level, and the action of the screen member 6 prevents dust, etc. from flowing into the water intake 2 (No. 4a).
(see figure). In addition, in this case, water storage tank 1
0 and 12 are empty.

In this way, when the water surface freezes, after attaching the locking device 30 of the auxiliary float 26 to the mounting member 32, one air pipe 14 is pumped using a water supply pump device (not shown). By injecting external water into the water storage tanks 10 and 12 through the pier, the buoyancy of the floating pier itself is reduced to a depth that does not pose a problem even if the water surface freezes, preferably
It is held by an auxiliary float 26 while submerged in water to a depth of about 2 m (see Figure 4b). In addition, in response to fluctuations in water level in this state, the reduced buoyancy of the floating jetty and the buoyancy of the auxiliary float 26 cause the floating to slide.

Also, when the water surface freezes,
One or both air pipes 14 or 1
6, air is injected from the outside, and the submersible pump device 20 is operated to discharge the injected water in the water storage tanks 10 and 12 through the discharge pipe 22 to increase buoyancy (see Fig. 4c). Raise the pier to the surface of the water and use it normally. In addition, since the auxiliary float 26 is detachably arranged in the water storage tank 10, it can be removed after floating and stored as appropriate until freezing time, thereby avoiding inconveniences such as loss or damage.

〔Effect of the invention〕

As mentioned above, according to the floating jetty for dust removal according to the present invention, when the water surface freezes, the floating jetty itself is kept under the water surface where it will not be affected even if it freezes, and when the water surface is frozen, the floating jetty itself is maintained under the water surface where it is not affected by the freezing, and when the water surface is frozen, the floating jetty itself is kept under the water surface where it is not affected. Since the floating pier can be used while floating on the water surface depending on the situation, damage to the guide rail, main body float, screen member, etc. can be prevented and durability can be improved. Also,
This method has various advantages, such as not only being able to omit the work of landing and storing the floating pier, but also reducing its maintenance and management costs.

Although the preferred embodiments of the floating jetty for dust removal according to the present invention have been described above, the present invention is not limited to these embodiments, and various design changes can be made without departing from the spirit of the present invention. Of course.

[Brief explanation of drawings]

1 is an explanatory plan view showing a preferred embodiment of the floating pier for dust removal according to the present invention, FIG. 2 is a partially omitted front view of the floating pier shown in FIG. 1, and FIG. 3 is shown in FIG. 1. A cross-sectional explanatory diagram of a floating pier. Figure 4 is an explanatory diagram of the floating pier shown in Figure 1 when it is used, submerged, and reused. Figure 5 is a partially omitted diagram of a conventional floating pier installed in a water intake tower. The front view and FIG. 6 are explanatory diagrams of a conventional floating pier when the water surface is frozen. 10, 12... Water storage tank, 14, 16... Air pipe, 18... Water pipe, 20... Submersible drainage pump device, 22... Drain pipe, 26...
...Auxiliary float.

Claims (1)

[Claims] 1. In a dust removal floating pier in which a pier body made of a float body is slidably installed on the guide rail of a water intake tower and a dust removal screen member is arranged on this pier body, a water storage tank is provided at a predetermined location on the pier body, This water storage tank is equipped with a submersible pump device for discharging the water stored in the tank and an air pipe that extends upward and communicates with the atmosphere even when submerged, and the pier itself is equipped with a floating pier in a submerged state. A floating pier for dust removal characterized by detachably disposing one or more auxiliary floats that hold the water at a predetermined water depth.