Energy conversion device

Abstract

The energy conversion device comprises a liquid inlet pipe, a liquid outlet pipe, a first hydraulic motor, a second hydraulic motor, a piston box and a floating barrel, a liquid inlet and a liquid outlet are formed in the piston box, and the energy conversion device is characterized in that a first one-way valve only allowing liquid to flow to the piston box from the first hydraulic motor is arranged on a pipeline between the first hydraulic motor and the piston box; a second one-way valve which only allows liquid to flow to the second hydraulic motor from the piston box is arranged on a pipeline between the second hydraulic motor and the piston box; a piston is arranged in the piston box, the floating barrel is connected with the piston through a vertical connecting rod, and the lower surface of the piston is connected with the bottom of the piston box through a return spring. According to the energy conversion device, in the floating process of the floating barrel, the piston can be driven to move upwards in the piston box, and external seawater is forced to drive the first hydraulic motor to rotate; when the floating barrel is located at the wave trough position, seawater is forced to drive the second hydraulic motor to rotate, and then the generator is driven to generate electricity, so that tidal energy is utilized.

Description

Technical Field

[0001] The utility model relates to an energy conversion device, and more specifically, to an energy conversion device which converts tidal energy into mechanical energy for driving a hydraulic motor to rotate. Background Art

[0002] Affected by the gravitational pull of the moon and the sun on the earth and the rotation of the earth, the seawater will rise and fall periodically. The energy contained in the periodic rise and fall of the seawater becomes tidal energy. There are many forms of tidal energy utilization, among which tidal energy power generation is one of the main methods. At present, the main method of tidal energy power generation is still the reservoir storage method. When the tide is high, the water enters the reservoir and is stored in the form of potential energy. When the tide is low, the seawater stored in the reservoir drives the generator to generate electricity under the action of the liquid level difference.

[0003] However, the method of using reservoir water for power generation usually requires the construction of a larger reservoir, and usually requires the liquid level difference to be at least 3~5m. Not only is the construction cost of the reservoir high, but the geographical environment requirements are also relatively high, and it is relatively difficult to popularize. To this end, this paper proposes an energy conversion device that converts the periodic fluctuations of seawater into energy that drives the movement of a hydraulic motor. Summary of the invention

[0004] In order to overcome the disadvantages of the above technical problems, the utility model provides an energy conversion device.

[0005] The energy conversion device of the utility model comprises a liquid inlet pipe, a liquid outlet pipe, a first hydraulic motor, a second hydraulic motor, a piston box and a floating barrel. The bottom of the piston box is provided with a liquid inlet and a liquid outlet communicated with the internal cavity thereof. The liquid inlet pipe is communicated with the liquid inlet of the first hydraulic motor, the liquid outlet of the first hydraulic motor is communicated with the liquid inlet of the piston box via a pipeline, the liquid outlet of the piston box is communicated with the liquid inlet of the second hydraulic motor via a pipeline, and the liquid outlet of the second hydraulic motor is communicated with the liquid outlet pipe. The utility model is characterized in that a first one-way valve which only allows liquid to flow from the first hydraulic motor to the piston box is provided on the pipeline between the first hydraulic motor and the piston box, and a second one-way valve which only allows liquid to flow from the piston box to the second hydraulic motor is provided on the pipeline between the second hydraulic motor and the piston box. The upper end of the piston box is open, a piston is provided in the piston box, the floating barrel is connected with the piston via a vertical connecting rod, and the lower surface of the piston is connected with the bottom of the piston box via a return spring.

[0006] The energy conversion device of the utility model comprises a liquid storage box, wherein a liquid inlet and a liquid outlet are arranged on the liquid storage box, the liquid outlet on the liquid storage box is connected with a liquid inlet pipe, and the liquid inlet on the liquid storage box is connected with a liquid outlet pipe via a liquid return pipe; the liquid storage box stores liquid medium which circulates among the liquid storage box, a first hydraulic motor, a piston box and a second hydraulic motor during the process of a floating barrel floating up and down with the tide.

[0007] In the energy conversion device of the utility model, the liquid storage box is provided with a liquid injection pipe connected with the internal cavity thereof, the upper end of the liquid injection pipe is a liquid injection port connected with the outside, and a sealing cover for sealing the liquid injection port is provided on the liquid injection port.

[0008] In the energy conversion device of the utility model, the number of the return springs in the piston box is 2 or more.

[0009] In the energy conversion device of the utility model, generators are connected to the output shafts of the first hydraulic motor and the second hydraulic motor.

[0010] The beneficial effects of the utility model are as follows: the energy conversion device of the utility model is provided with a liquid inlet pipe, a liquid outlet pipe, a first and a second hydraulic motor, a first and a second one-way valve, a piston box and a floating barrel, the liquid inlet pipe is communicated with the liquid inlet of the piston box through the first hydraulic motor and the first one-way valve, the liquid outlet of the piston box is communicated with the liquid outlet pipe through the second one-way valve and the second hydraulic motor, and the floating barrel is connected with the piston through a connecting rod, and the lower surface of the piston is connected with the bottom of the piston box through a return spring; in this way, in the process of the floating barrel floating up with the crest of the tide, the piston will be driven to move upward in the piston box, so that the pressure in the piston box is reduced, and the seawater outside is forced to enter the first hydraulic motor through the liquid inlet pipe, driving the first hydraulic motor to rotate, and the first hydraulic motor further drives the generator to generate electricity, and when the floating barrel is at the trough position of the tide, the piston is driven to move downward under the pressure of the return spring on the piston, forcing the seawater in the piston box to flow into the second hydraulic motor through the second one-way valve, driving the second hydraulic motor to rotate, and further driving the generator to generate electricity, so as to realize the utilization of tidal energy.

[0011] Furthermore, by providing a liquid storage tank, the liquid outlet of the liquid storage tank is connected to the liquid inlet pipe, and the liquid inlet of the liquid storage tank is connected to the liquid outlet pipe via the return pipe. In this way, the liquid medium circulating in the liquid storage tank, the first and second hydraulic motors and the piston box no longer uses seawater, and an oil medium with better performance can be used, which can not only improve the conversion efficiency of tidal energy, but also avoid corrosion to the motor, the one-way valve, the piston box, the liquid storage tank and the pipeline caused by the use of seawater. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the first embodiment of the energy conversion device of the utility model;

[0013] Figure 2 It is a rear view of the first embodiment of the energy conversion device of the utility model;

[0014] Figure 3 It is a left side view of the first embodiment of the energy conversion device of the utility model;

[0015] Figure 4A top view of the first embodiment of the energy conversion device of the utility model;

[0016] Figure 5 A bottom view of the first embodiment of the energy conversion device of the utility model;

[0017] Figure 6 A perspective view of the first embodiment of the energy conversion device of the utility model;

[0018] Figure 7 It is a front view of the second embodiment of the energy conversion device of the utility model;

[0019] Figure 8 It is a rear view of the second embodiment of the energy conversion device of the utility model;

[0020] Fig. 9 A top view of a second embodiment of the energy conversion device of the utility model;

[0021] Fig.10 It is a stereoscopic diagram of the second embodiment of the energy conversion device of the present utility model.

[0022] In the figure: 1 liquid inlet pipe, 2 liquid outlet pipe, 3 first hydraulic motor, 4 second hydraulic motor, 5 piston box, 6 float barrel, 7 connecting rod, 8 first one-way valve, 9 second one-way valve, 10 return spring, 11 piston, 12 liquid storage tank, 13 return liquid pipe, 14 liquid injection pipe, 15 liquid injection port. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Embodiment 1, as Figures 1 to 6 As shown, the front view, rear view, left view, top view, bottom view and stereoscopic view of the first embodiment of the energy conversion device of the utility model are respectively given. The energy conversion device of the first embodiment shown is composed of a liquid inlet pipe 1, a liquid outlet pipe 2, a first hydraulic motor 3, a second hydraulic motor 4, a piston box 5, a float 6, a first one-way valve 8 and a second one-way valve 9. The two sides of the bottom of the piston box 5 are respectively provided with a liquid inlet and a liquid outlet. The upper end of the piston box 5 is open, and a piston 11 is arranged in the piston box 5. The center of the upper surface of the piston 11 is fixedly connected to the lower end of the connecting rod 7. The connecting rod 7 is vertically arranged. The upper end of the connecting rod 7 is fixedly connected to the float 6. The lower surface of the piston 11 is connected to the bottom of the piston box 5 through a return spring 10.

[0025] The inlet pipe 1 is connected to the inlet of the first hydraulic motor 3, the outlet of the first hydraulic motor 3 is connected to the inlet of the piston box 5 through a pipeline, and a first check valve 8 is provided on the pipeline between the first hydraulic motor 3 and the piston box 5, and the first check valve 8 only allows the liquid medium (seawater) to flow from the first hydraulic motor 3 to the piston box 5. In this way, when the floating barrel 6 floats up with the crest of the tide and the pressure in the piston box 5 is reduced, the seawater from the outside will be forced to flow through the first hydraulic motor 3 through the inlet pipe 1 and enter the piston box 5. When the seawater flows through the first hydraulic motor 3, it will drive it to rotate, and the rotating first hydraulic motor will drive the load to work, such as driving the generator to generate electricity.

[0026] The liquid outlet of the piston box 5 is connected to the liquid inlet of the second hydraulic motor 4 through a pipeline, and the liquid outlet of the second hydraulic motor 4 is connected to the liquid outlet pipe 2. A second one-way valve 9 is arranged on the pipeline between the piston box 5 and the second hydraulic motor 4; the second one-way valve 9 only allows the liquid medium (seawater) to flow from the piston box 5 to the second hydraulic motor 4. In this way, when the floating barrel 6 is at the trough position of the tide, the piston 11 is forced to move downward under the pulling action of the return spring 10, which will increase the pressure of the liquid medium in the piston box 5, and then force the liquid medium to flow out from the piston box 5 through the second hydraulic motor 4. When the seawater flows through the second hydraulic motor 4, it will drive it to rotate, and the rotating second hydraulic motor 4 drives the load to work, such as driving the generator to generate electricity, so as to realize the utilization of tidal energy.

[0027] The working principle of the energy conversion device in Example 1 is as follows: when in use, the piston box 5, the first hydraulic motor 3 and the second hydraulic motor 4 are all fixed below the sea level, and the connecting rod 7 is ensured to be in a vertical state, and the buoy 6 is also ensured to float up and down under the action of tidal waves.

[0028] When the buoy 6 moves upward with the crest of the tide, the piston 11 will be pulled upward through the connecting rod 7. During the upward movement of the piston 11, the pressure in the piston box 5 will be reduced. Due to the one-way conductivity of the first one-way valve 8 and the second one-way valve 9, the external seawater will be forced to enter the piston box 5 through the liquid inlet pipe 1 and the first hydraulic motor 3, thereby driving the first hydraulic motor 3 to utilize the tidal energy. When the buoy 6 moves to the trough position of the tidal wave, at this time, the piston 11 moves downward under the action of the return spring 10, so that the seawater pressure in the piston box 5 increases, and the seawater with increased pressure flows out through the second one-way valve 9, the second hydraulic motor 4 and the liquid outlet pipe 2, thereby driving the second hydraulic motor 4 to drive the load to work. This cycle is repeated to realize the utilization of tidal energy.

[0029] It can be seen that in Example 1, since seawater is used as the liquid medium, there is no risk of pollution to the marine environment after leakage of oil medium, but the corrosion of seawater to the hydraulic motor, the one-way valve, the piston box 5 and the pipeline needs to be considered.

[0030] Embodiment 2, as Figures 7 to 10 As shown, the front view, rear view, top view and stereoscopic view of the second embodiment of the energy conversion device of the utility model are respectively given. Compared with the embodiment 1, this embodiment is the same as the embodiment 1 except that a liquid storage tank 12 and a liquid return pipe 13 are additionally provided. The liquid storage tank 12 shown is provided with a liquid inlet and a liquid outlet. The liquid outlet of the liquid storage tank 12 is connected to the liquid inlet pipe 1, and the liquid inlet of the liquid storage tank 12 is connected to the liquid outlet pipe 2 through the liquid return pipe 13. The liquid storage tank 12 shown is provided with a liquid injection pipe 14, which is connected to the internal cavity of the liquid storage tank 12. The upper end of the liquid injection pipe 14 is a liquid injection port 15 communicating with the outside, and a sealing cover is provided on the liquid injection port 15.

[0031] It can be seen that in this embodiment, due to the provision of the liquid storage tank 12 and the liquid return pipe 13, the first hydraulic motor 3, the piston box 5, the second hydraulic motor 4, and the liquid storage tank 12 form a closed system through the pipeline. Therefore, oils with better performance can be used as the working medium to drive the first hydraulic motor 3 and the second hydraulic motor 4.

[0032] During operation, when the float 6 rises with the crest of the tidal wave, the oil medium in the liquid storage tank 12 flows into the piston box 5 through the liquid inlet pipe 1, the first hydraulic motor 3 and the first one-way valve 8 to drive the first hydraulic motor 3 to work; when the float 6 is at the trough position of the tidal wave, in the process of the return spring 10 pulling the piston 11 downward, the oil medium in the piston box 5 is forced to flow into the liquid storage tank 12 through the second one-way valve 9, the second hydraulic motor 4, the liquid outlet pipe 2 and the return pipe 13, and at the same time drives the second hydraulic motor 4 to work.

[0033] It can be seen that in this embodiment 1, since oil medium is used as the medium to drive the hydraulic motor to work, its performance is more superior, but it is necessary to pay attention to preventing leakage to avoid pollution of the marine environment caused by leakage of oil medium.

Claims

1. An energy conversion device, comprising a liquid inlet pipe (1), a liquid outlet pipe (2), a first hydraulic motor (3), a second hydraulic motor (4), a piston box (5) and a floating bucket (6), wherein the bottom of the piston box is provided with a liquid inlet and a liquid outlet communicating with the internal cavity thereof, the liquid inlet pipe is communicated with the liquid inlet of the first hydraulic motor, the liquid outlet of the first hydraulic motor is communicated with the liquid inlet of the piston box via a pipeline, the liquid outlet of the piston box is communicated with the liquid inlet of the second hydraulic motor via a pipeline, and the liquid outlet of the second hydraulic motor is communicated with the liquid outlet pipe; characterized in that: A first one-way valve (8) is provided on the pipeline between the first hydraulic motor and the piston box, which only allows liquid to flow from the first hydraulic motor to the piston box; a second one-way valve (9) is provided on the pipeline between the second hydraulic motor and the piston box, which only allows liquid to flow from the piston box to the second hydraulic motor; the upper end of the piston box is open, a piston (11) is provided in the piston box, the float barrel is connected to the piston via a vertical connecting rod (7), and the lower surface of the piston is connected to the bottom of the piston box via a return spring (10).

2. The energy conversion device according to claim 1, characterized in that: The invention comprises a liquid storage tank (12), wherein a liquid inlet and a liquid outlet are arranged on the liquid storage tank, wherein the liquid outlet on the liquid storage tank is connected to a liquid inlet pipe (1), and the liquid inlet on the liquid storage tank is connected to a liquid outlet pipe (2) via a liquid return pipe (13); the liquid storage tank stores a liquid medium which circulates between the liquid storage tank, a first hydraulic motor (3), a piston box (5), and a second hydraulic motor (4) during the process of the floating barrel (6) floating up and down with the tide.

3. The energy conversion device according to claim 2, characterized in that: The liquid storage box (12) is provided with a liquid injection pipe (14) connected to the internal cavity thereof, the upper end of the liquid injection pipe is a liquid injection port (15) connected to the outside, and a sealing cover is provided on the liquid injection port to seal it.

4. The energy conversion device according to claim 1 or 2, characterized in that: The number of return springs (10) in the piston box (5) is 2 or more.

5. The energy conversion device according to claim 1 or 2, characterized in that: Generators are connected to the output shafts of the first hydraulic motor (3) and the second hydraulic motor (4).

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