JPH0286969A - Wave pump - Google Patents

Abstract

PURPOSE:To move a piston in a cylinder via a rod as well as to feed a required spot with seawater in the cylinder from a discharge pipe by utilizing pressure by wave force of the seawater sand head difference, and rocking a pressure receiving plate with a hinge fulcrum. CONSTITUTION:When wave energy of seawater W works on a pressure receiving plate 7, this plate 7 rocks, thereby moving a piston 6 so as to expand the inside of a cylinder 1. Therefor the inside of this cylinder 1 comes to negative pressure, a check valve 4 in a suction pipe 2 is opened, and thereby the seawater is sucked in the cylinder 1. On the other hand, when the wave energy works from the reverse direction, the piston 6 is moved in direction of compressing the inside of the piston 1 by rock motion of the pressure receiving plate 7. Consequently, the check valve 4 of the suction pipe 2 is closed and simultaneously a check valve 5 of a discharge pipe 3 is opened instead. With this constitution, the seawater W is fed to a required spot from the discharge pipe 3.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wave pump that uses wave energy, which is composed of wave head difference and wave force generated by movement, as a driving force for pumping water, supplying air, etc. be.

<Prior Art> Wave power generation devices are well known as devices that utilize wave energy. In recent years, research and development has been carried out to make even more effective use of pumps, which are individual power elements for use in seawater pumped storage power generation systems, aeration-based seawater purification systems, and deep water intake.

Specifically, a water pump (prior art A) has been proposed that utilizes a float and uses the floating body movement caused by waves as a driving force.

This water pump is constructed by installing a check valve on a fixed pipe that extends from seawater to a reservoir, and attaching the outer pipe with the check valve to a float that floats on the sea surface. It consists of things that are installed and configured. According to this document, it is disclosed that when the float descends, seawater is sucked in from an external vibrator, and when the float rises, the sucked seawater is sent to a pipe on the fixed side, and is thereby pumped up to the reservoir. Seawater is continuously pumped into the reservoir by the vertical movement of the float and the action of the check valve.

Also, JP-A-58-172475 (prior art)
discloses wave-dissipating pumps installed at the shores of the waves, such as quays and breakwaters. This pump utilizes the fact that seawater washes up and recedes due to waves, and operates a piston connected to a section that adjusts the amount of seawater by the difference in the weight of the seawater.

Furthermore, Japanese Patent Application Laid-Open No. 51-69201 (prior art iii) discloses a wave pump in which a piston is reciprocated by the vertical movement of a float.

<Problem to be Solved by the Invention> However, none of these conventionally proposed techniques utilizes wave energy sufficiently effectively.

That is, if considered individually, both prior art techniques A and C utilize a float and utilize only the vertical movement of waves for the pumping action. Utilization of the vertical motion of waves refers to the use of potential energy due to the head difference from the top of the wave to the trough, or in other words, the water head difference. Prior arts A and C utilize this potential energy.

In addition to the potential energy due to the above-mentioned water head difference, wave energy includes pressure energy and wave force due to movement such as the waves crashing on the shore.

The use of wave energy by the float is a partial use of wave energy because the pressure energy and wave force portions described above are not used.

Furthermore, the prior art discloses that the pump is operated by wave force and changes in the weight of the seawater, and the main driving energy is the change in the weight of the seawater and the action of a separately provided spring. The wave power mentioned above is used to cause seawater to flow into the area, and is not used as driving energy for the pump. Then, the amount of seawater flowing in and descending is applied to the piston by applying upward force using a splinter, thereby obtaining reciprocating motion of the piston.

As mentioned above, this technology does not only utilize changes in the weight of seawater, but also requires power from a splinter. Therefore, it is less durable than the above three methods, and it is difficult to automatically adjust the sublinker in a timely manner, so the installation location is limited. For example, in places with large tidal differences, the amount of seawater flowing in tends to fluctuate, so there is a risk that the pump will not be able to operate. That is, there are also problems in practicality.

The present invention is provided to solve the conventional problems as described above.

An object of the present invention is to provide a wave pump that can utilize wave energy obtained from the head difference of waves and wave force more effectively than before.

Means for Solving the Problems> In order to achieve the above object, the present invention provides a wave pump that is driven using wave energy generated by a water head difference and wave force, in which a suction pipe and a discharge pipe are connected to a piston. Each piston is provided with a check valve that communicates through a built-in cylinder and opens and closes based on the pressure difference caused by the reciprocating movement of the piston. It is connected to a rod that moves forward and backward in conjunction with the movement.

In this case, it is also possible to provide two sets of discharge pipes and suction pipes at both ends of the cylinder so that suction and discharge operations are always carried out during both the reciprocating strokes of the piston.

In addition, by arranging the cylinder, suction pipe, etc. inside the concrete caisson, which has ventilation openings on the top surface, and by opening a part of the side of the concrete caisson and attaching a pressure receiving plate to the lid of this opening, it is possible to It can also be configured as

<Operation> When a wave hits the pressure plate, the wave force and the pressure due to the water head difference act, causing the pressure plate to swing around the hinge fulcrum.

If the direction is to push the piston through this swing or the rod, the piston will move so as to compress the inside of the cylinder. If the cylinder is filled with seawater, the seawater pressure caused by this compression will open the check valve on the discharge pipe side. As a result, the seawater in the cylinder flows out into the discharge pipe and is supplied to the required location from the discharge pipe.

Next, when wave energy acts on the pressure plate in the opposite direction to the above, the piston moves to expand the cylinder volume. Then, the inside of the cylinder becomes negative pressure, so the check valve on the discharge pipe side closes and the check valve on the suction pipe side opens. As a result, seawater is sucked in from the opening of the suction pipe and fills the inside of the cylinder.

Wave energy repeats back-and-forth motion in a natural cycle. Therefore, the pump action of sucking in and discharging seawater can be repeated semi-permanently at the above-mentioned period.

In this case, if two sets of discharge pipes and suction pipes are provided at both ends of the cylinder, suction and discharge can be performed simultaneously on both sides by reciprocation of the piston. If the first set is made into a single-acting type, the second set can be made into a double-acting type so that the pumping action can be performed with twice the efficiency.

Furthermore, if the wave pump is incorporated into a concrete caisson to form an integrated unit, equipment construction at sea can be easily carried out.

<Example> Embodiments of the present invention will be described below based on the drawings.

1 and 2 are a first embodiment and a second embodiment showing the basic structure of the present invention together with its operation. The first embodiment shows a single-acting type in which the piston moves in one direction to discharge seawater in the cylinder, and moves in the other direction to suck seawater into the cylinder, and the second embodiment shows discharge and suction in both reciprocating processes. This shows a double-acting type that performs operations at the same time.

In FIG. 1, 1 is a cylinder, and a suction pipe 2 and a discharge pipe 3 are connected to the negative end thereof. Suction pipe 2
The other end of the discharge pipe 3 is opened at an appropriate depth under the sea, and the other end of the discharge pipe 3 is opened at an appropriate position above the sea. The opening position of the discharge pipe 3 is a place where seawater is used, such as a water storage tank in a pumped storage power generation system, an artificial fish pond, or a supply water area in the case of seawater purification. A check valve 4 that opens in one direction on the cylinder 1 side is provided near the connection of the suction pipe 2 to the cylinder 1. Also,
A check valve 5 that opens in one direction toward the discharge opening is provided near the connection of the discharge pipe 3 to the cylinder l. Both check valves 4 and 5 open and close in response to pressure changes within the cylinder 1 due to the reciprocating movement of a piston 6 built into the cylinder 1, respectively. 6a is a water stop link that makes the sliding contact between the piston 6 and the cylinder 1 tight. Incidentally, the cylinder 1 and/or the piston 6 are coated with a treatment to reduce friction, for example, with fluorocarbon resin, in order to make sliding contact smooth.

Reference numeral 7 denotes a pressure receiving plate, which is erected in the water depth direction and supported at one end side of the upper end or the lower end by a hinge 7a, so as to be able to swing about the hinge fulcrum. It is desirable that the pressure receiving plate 7 be formed of a light and rigid member. The pressure receiving plate 7 is arranged at such a position that a part of the pressure receiving plate 7 is exposed from the average wave crest of the seawater W. Further, the hinge 7a is attached to a base member (not shown) for fixing the cylinder 1 and the like.

A suitable position of this pressure receiving plate 7 and the piston 6 are connected via a rod 8. In this embodiment, the pressure receiving plate 7
oscillates, and any fixed point moves in an arc, changing its position up and down with respect to the horizontal level. Therefore, the rod 8 connecting the linearly moving piston 6 and the pressure receiving plate 7 is connected to the pressure receiving plate 7 by a hinge 9 so as to absorb the above-mentioned positional change.

As a result, when the pressure receiving plate 7 is swung by wave energy, the rod 8 moves forward and backward in the axial direction in conjunction with it, that is, the piston 6 moves back and forth.

According to this configuration, as shown by the arrow in FIG. 1(A),
When the wave energy of seawater W acts on the pressure receiving plate 7,
The pressure receiving plate 7 swings to move the connected piston 6 so as to expand inside the cylinder 1. As a result, the inside of the cylinder 1 becomes negative pressure, so the check valve 4 of the suction pipe 2 opens, and seawater is sucked into the cylinder 1 and flows into the cylinder 1. Next, Figure 1 (
As shown in B), when wave energy is applied from the direction opposite to that described above, the piston 6 moves in the direction of compressing the inside of the cylinder 1 due to the rocking of the pressure receiving plate 7. Then, the check valve 4 of the suction pipe 2 is closed by the compression pressure, and at the same time, the check valve 5 of the discharge pipe 3 is opened. As a result, the seawater W is discharged from the discharge pipe 3.
will be supplied to the required location. The pumping action of the piston 6, cylinder 1, etc. is repeated semi-permanently as the pressure receiving plate 7 alternately swings about the hinge 7a as a fulcrum due to the reciprocating action of wave energy.

The wave energy used by the pressure receiving plate 7 is the pressure generated by the head difference between the crest and trough of the wave and the wave force due to the movement of the wave.

Therefore, wave energy can be used more efficiently than a float device that uses only the potential energy obtained from the head difference of waves.

Next, FIG. 2 shows a wave pump in which the configuration of the cylinder 10 is changed. That is, at both ends of the cylinder 10, suction pipes 11, 12, discharge v13.14 and check valves 15.16,
17 and 18 respectively.

According to this, when the piston 6 reciprocates, the check valves on the side corresponding to each operation step are opened and closed, and the water pumping operation can be performed at all times.

Therefore, compared to the first embodiment, the operating efficiency is simply doubled.

FIGS. 3 to 5 are a side view, a front view, and a plan view showing a more specifically constructed embodiment using the wave pump according to the first embodiment of the present invention.

In the figure, 20 is a concrete caisson. This concrete caisson 20 has a ventilation opening 21 formed in the upper surface and an opening 22 formed in a part of the side surface. A pressure receiving plate 7 is disposed in the opening 22 in the form of a lid, and its lower end is attached to the concrete caisson 20 with a hinge 7a.

In addition, the cylinder l, suction pipe 2, etc. are arranged inside the concrete caisson 20, and the discharge pipe 3 is arranged inside the concrete caisson 20.
It extends from the top surface and faces the desired location. According to this configuration, since it can be integrated as a unit as a wave pump, it becomes easy to handle and work such as facility construction on the sea can be done quickly.

In the above embodiments, seawater has been described as the suction and discharge material, but the pump unit is not limited to this, and it is clear that air may be used.

<Effects of the Invention> As described in detail above, according to the present invention, wave energy can be used even more effectively. This suggests that when compared with a conventional wave pump, the wave pump of the present invention is smaller than the conventional wave pump, provided that the pumping amount, pumping head, and other performances are the same. Therefore, it is possible to provide a wave pump that is performance-wise, economically advantageous, and highly practical.

[Brief explanation of drawings]

FIGS. 1(A) and (B) are explanatory diagrams of the first embodiment showing the basic structure and operation of the wave pump according to the present invention. FIGS. An explanatory diagram of the second embodiment showing the basic configuration of the wave pump along with its operation, and FIGS. 3 to 5 show an embodiment more specifically configured using the wave pump according to the first embodiment of the present invention. FIG. 2 is a side view, a front view, and a plan view. 1.10...Cylinder, 2,11.12...Suction pipe. 3.13.14...Discharge pipe. 4, 5, 15.16, 17.13... Check valve. 6... Piston, 7... Pressure receiving plate. 7a, 9...hinge, 8...rod. 20... Concrete caisson, 21... Ventilation opening. 22...Opening.

Claims (1)

[Claims] A wave pump that is driven by using wave energy generated by a water head difference and wave force, in which a suction pipe and a discharge pipe communicate through a cylinder containing a piston, and the pressure generated by the reciprocating movement of the piston is Each piston is provided with a check valve that opens and closes with a difference, and the piston is connected to a rod that moves forward and backward in conjunction with the swinging movement of a pressure receiving plate that stands upright in the water depth direction and has one end supported by a hinge. Wave pump.