JPH0322557Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Technical Field] The present invention relates to a pressure relief valve device for a wave power generation device that automatically opens and closes a pressure relief valve as a safety valve using self-pressure in an air chamber.

[Prior art]

In conventional wave power generation devices, the pressure inside the air chamber is constantly monitored by a pressure detector, and when the air chamber becomes abnormally high pressure, for example, a pressure relief valve (safety valve) is connected to an opening/closing device such as a hydraulic cylinder. Since the safety equipment itself had to be twisted open to release the air in the air chamber, the mechanism of the safety equipment itself became complicated, leading to an increase in costs.

[Purpose of invention]

An object of the present invention is to simplify a pressure relief valve device in a wave power generation device and reduce manufacturing costs, and to make it possible to adjust the operating pressure of the pressure relief valve.

[Structure of the idea]

That is, in the pressure relief valve device for a wave power generation device of the present invention, a turbine chamber is disposed so as to face an air chamber whose lower surface is open to the water, and air flow caused by the vertical movement of the liquid level in the air chamber causes the turbine chamber to rise. In the wave power generation device configured to drive an air turbine, the air chamber is provided with a flap valve for opening at the time of abnormally high pressure and a flap valve for opening at the time of abnormally low pressure, and each flap valve is provided with a flap valve for opening at the time of abnormally low pressure. It is characterized by the provision of balance weights.

Here, the flap valve is constructed by providing a single plate-like member that can be raised and lowered, but by dividing it into a plurality of parts, the impact when opening and closing can be reduced.

In this way, by arranging the flap valve for opening in the event of abnormally high pressure and the flap valve for opening in the event of abnormally low pressure in the air chamber, and by arranging each flap valve with a balance weight for adjusting the operating pressure, it is possible to The structure of the pressure relief valve device itself is much simpler than that of the device, making it possible to reduce manufacturing costs. Furthermore, the operating pressure of the pressure relief valve can be easily adjusted.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a wave power generation device, in which an air chamber 1 is fixedly provided to a caisson 2, the bottom of the front surface is opened to waves 3, and the air chamber 1 is opened by the action of the waves 3. Air A inside is pushed and pulled. In the rear wall 4 of the air chamber 1, a pair of turbine chamber air inflow and outflow inlets 5, 5 are provided.
is provided, and the turbine chamber 6 is
A turbine (not shown) installed inside rotates,
Power is generated by a generator (not shown) coaxial with this turbine.

In addition, near each turbine chamber air inlet/outlet 5,
A pressure relief valve device 7 as shown in FIG. 2 is installed in each case. As shown in FIG. 2, each pressure relief valve device 7 has a trapezoidal valve box 10 whose cross section gradually increases toward the opening 9, and an upper valve seat 11 has a plate-shaped exhaust side pressure relief valve. A valve 12 is installed to be able to rise and fall freely. Further, a plate-shaped intake side pressure relief valve 14 is installed on the lower valve seat 13 so as to be able to rise and fall freely. Also,
Each pressure relief valve 12, 14 has a pressure relief valve 12,
Balance weights W are installed to adjust the opening and closing of the pressure relief valves 12 and 14, and each balance weight W is configured to be movable in the longitudinal direction of the pressure relief valves 12 and 14 by known means.

Next, the operation of the pressure relief valve will be explained.

(a) FIG. 3 shows the state at the set pressure, in which the exhaust side pressure relief valve 12 and the intake side pressure relief valve 14 are both closed.

(b) FIG. 4 shows the state at the time of abnormally high pressure, in which the pressure relief valve 12 on the exhaust side opens and the air A in the air chamber 1 is released into the atmosphere.

(c) FIG. 5 shows a state at the time of abnormally low pressure, in which the pressure relief valve 14 on the intake side opens and air flows into the air chamber 1 from the atmosphere.

[Effect of idea]

As mentioned above, the present invention has a flap valve for opening at abnormally high pressure and a flap valve for opening at abnormally low pressure in the air chamber, and each flap valve is equipped with a balance weight for adjusting the operating pressure. The structure of the pressure relief valve device itself is much simpler than that of conventional safety valve devices. As a result, efforts have been made to reduce manufacturing costs. Furthermore, the operating pressure of the pressure relief valve can now be easily adjusted.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a wave power generation device, FIG. 2 is a perspective view of a pressure relief valve device according to the present invention, and FIGS. 3 to 5 are explanatory diagrams of the operation of the present invention. 1...Air chamber for wave power generation, 12...Pressure relief valve for exhaust, 14...Pressure relief valve for intake.

Claims (1)

[Scope of utility model registration request] In the wave power generation device, a turbine chamber is disposed so as to face an air chamber whose lower surface is open to water, and an air turbine in the turbine chamber is driven by an air flow caused by vertical movement of a liquid level in the air chamber. A pressure relief valve device for a wave power generation device, in which an air chamber is provided with a flap valve for opening at abnormally high pressure and a flap valve for opening at abnormally low pressure, and each flap valve is provided with a balance weight for adjusting operating pressure.