CN210780601U - Liquid energy collecting device - Google Patents

Abstract

The liquid energy acquisition device comprises a mounting piece (1) and a liquid storage part (2), wherein the liquid storage part (2) is arranged on the mounting piece (1) in a turnover mode, and the liquid storage part (2) turns over and discharges liquid when the stored liquid reaches a preset weight; the first vibration part (3) is mounted on the mounting piece (1), the first vibration part (1) is provided with a first piezoelectric element (31), and the liquid storage part (2) intermittently impacts the first vibration part (3) when overturned. The utility model discloses a liquid energy collection system, the energy of its collection is great to energy conversion efficiency is high.

Description

Liquid energy collecting device

Technical Field

The utility model relates to an energy acquisition technical field especially relates to liquid energy collection system.

Background

Wireless sensor networks and various low-power electronic products have been widely used in various technical fields, but the development of technologies for supplying power to the wireless sensors and the low-power electronic products is relatively delayed, so that some low-power products are limited in practical application. For wireless sensor networks and low-power consumption electronic products which are rapidly developed at present, in order to meet the requirements of lasting and reliable self-power supply of each sensing node, an energy collection technology has become one of the leading-edge technologies. The energy collection technology can collect solar energy, heat energy, vibration energy, wind energy, rainwater energy, tidal energy and the like in the natural environment through the transduction material and convert the solar energy, the heat energy, the vibration energy, the wind energy, the rainwater energy, the tidal energy and the like into electric energy, so that the electric energy can be provided for the low-power-consumption electronic product without an external power supply.

However, in the existing device for collecting energy such as rainwater energy and tidal energy, the technical problems of small energy and low conversion efficiency generally exist, for example, in the existing device for collecting rainwater energy, the raindrops fall to impact the piezoelectric blades to cause bending vibration of the piezoelectric blades, electric energy is generated and then is transmitted to the control energy storage component through the conducting wire, and the electric energy is stored in the control energy storage component. The energy of the raindrops hitting the piezoelectric blades is very small, and therefore, the conversion efficiency of the energy is also affected. Moreover, the size of the rain also affects the stability of energy collection.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem that the energy of the collection that current collection liquid energy device exists is little, energy conversion efficiency is low, provided a liquid energy collection system.

A fluid energy harvesting device comprising a mount; a liquid storage part which is installed on the installation part in a turnable manner and turns over and discharges liquid when the liquid stored in the liquid storage part reaches a preset weight; the first vibration part is installed on the installation part, a first piezoelectric element is arranged on the first vibration part, and the liquid storage part intermittently impacts the first vibration part when being overturned.

Preferably, the first vibration part is arranged on an overturning path of the bottom of the liquid storage part, and when the liquid storage part overturns, the bottom of the liquid storage part impacts the first vibration part.

Further preferably, the position where the liquid storage part impacts the first vibration part is higher than the turning axis of the liquid storage part.

Preferably, the liquid storage portion includes a liquid storage container having a cross-sectional area gradually decreasing from the opening portion toward the bottom.

Further preferably, the first vibrating portion includes a first vibrating member, one end of the first vibrating member is mounted on the mounting member, the other end of the first vibrating member is in a cantilever shape, and the first piezoelectric element is provided on the first vibrating member.

Preferably, a second vibration part is provided below the liquid storage part, the second vibration part including a second piezoelectric element and a second vibrating member, the second vibrating member being attached to the attachment member, the second piezoelectric element being attached to the second vibrating member.

Further preferably, one end of the second vibrating member is attached to the attaching member, the other end of the second vibrating member is in a cantilever shape, the cantilever end of the second vibrating member is located below the liquid reservoir, and the piezoelectric element is attached to the cantilever end of the second vibrating member.

Preferably, still include the third vibration portion, the third vibration portion includes third vibrating piece and third piezoelectric element, the one end of third vibrating piece is installed on the installed part, the other end of third vibrating piece is cantilever-shaped, third piezoelectric element sets up on the third vibrating piece, the stock solution portion is installed the cantilever of third vibrating piece is served.

Preferably, the third vibrating member includes two places, the liquid storage portion is located two places between the third vibrating members, and the liquid storage portion is hinged to the third vibrating members respectively.

Preferably, still include base and fourth piezoelectric element, the fourth piezoelectric element sets up on the installed part, the one end of installed part is fixed on the base, the other end of installed part is cantilever-shaped, the stock solution portion with first vibrating portion is installed respectively on the cantilever end of installed part.

The utility model discloses a liquid energy collection system owing to set up stock solution portion and first vibration portion, when the liquid that stock solution portion stored increases gradually and reaches preset weight, upset and discharge liquid, stock solution portion continues the upset owing to inertia behind the discharge liquid, can strike first vibration portion from this intermittently, and first piezoelectric element turns into these vibration mechanical energy electric energy. The device collects the liquid energy, the collected energy is large, and the energy conversion efficiency is high.

Drawings

Fig. 1(a) is a schematic perspective view of the basic structure of the liquid energy collecting device of the present invention;

FIG. 1(b) is a schematic plan view showing the basic structure of the liquid energy collecting apparatus of the present invention

FIG. 2 is a schematic view of a top view of an embodiment of a fluid energy harvesting device;

fig. 3 is a schematic view of the liquid energy harvesting device of fig. 2 in a bottom view.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the present invention can be implemented in many different ways, and is not limited to the embodiments described herein, but rather, these embodiments are provided to enable those skilled in the art to understand the disclosure more thoroughly.

Fig. 1(a) and 1(b) show the basic structure of a liquid energy collecting device, and referring to fig. 1(a) and 1(b), the liquid energy collecting device includes a base 51 for mounting the whole liquid energy collecting device beside a wireless sensor network (not shown) and various low-power electronic products (not shown), an energy conversion assembly (not shown) is disposed on the base 51, the energy conversion assembly is used for converting mechanical energy into electric energy so as to provide power for the sensors, and the like, the energy conversion assembly includes known components such as an energy collecting circuit, a signal conditioning circuit, and the like, wherein the energy collecting circuit is electrically connected with various piezoelectric elements such as a piezoelectric element of d31 mode, such as a piezoelectric ceramic plate, and the piezoelectric effect refers to some materials such as natural crystal materials such as quartz, a piezoelectric ceramic plate, a piezoelectric plate, Potassium sodium tartrate or engineering materials such as lithium niobate and lead zirconate titanate (PZT) and the like, wherein the generated electric polarization strength is changed under the action of mechanical stress), mechanical energy can be converted into alternating current electric energy to be output, the alternating current electric energy collected by the piezoelectric element can be converted into direct current after passing through the energy collecting circuit and the signal conditioning circuit, and when a plurality of piezoelectric elements exist, the direct current electric energy can be connected in parallel to charge a capacitor.

The base 51 is provided with the mounting piece 1, the liquid storage part 2 and the plurality of vibration parts 300 are mounted on the mounting piece 1, the piezoelectric elements 400 are respectively arranged on the vibration parts 300, when the liquid storage part 2 discharges liquid and turns over, the liquid storage part 2 drives the vibration parts 300 to vibrate, and the piezoelectric elements 400 on the vibration parts 400 respectively collect the vibration of the corresponding vibration parts 400 and convert mechanical energy into alternating current for output.

The liquid storage part 2 includes a liquid storage container 21, and the liquid storage container 21 may be a container having a regular shape, such as a container having a cylindrical cup shape, a container having a square cup shape, a container having a tapered shape in which the cross-sectional area gradually decreases from the opening portion toward the bottom portion, or the like, but the liquid storage container 21 may also be a container having an irregular shape. For the convenience of mounting and adjusting the liquid storage container 21, a liquid storage container having a regular shape is preferable.

The liquid storage part 2 is fixedly provided with a coupling shaft 22, specifically, the coupling shaft 22 can be fixed on the liquid storage container 21 by means of bonding, welding, screw coupling, and the like, preferably, the coupling shaft 22 includes two shafts which are respectively located at two opposite sides of the liquid storage part 2, and a connection line of the shaft centers of the two coupling shafts 22 can be orthogonal to the shaft center of the liquid storage container 21. The liquid storage part 2 can turn over by taking the axis of the connecting shaft 22 as the center, and the liquid storage part 2 can be directly hinged with the mounting part 1 through the connecting shaft 22 and turn over relative to the mounting part 1; it can also be hinged to other parts, turned upside down with respect to the same, by means of the coupling shaft 22.

The liquid storage portion 2 turns over and discharges the liquid when the liquid stored therein reaches a preset weight, which is a critical weight when the liquid in the liquid storage container 21 can turn over the liquid storage container 21, and the weight is determined according to the center of gravity of the liquid storage container 21 and the position of the coupling shaft 22, and can be obtained through software simulation or actual test.

The coupling shaft 22 of the liquid storage container 21 is disposed at a position that is offset from the center of gravity ZX of the liquid storage container 21 when empty, and ensures that the opening of the liquid storage container 21 is directed upward when empty. Empty means that there is no liquid or only a small amount of liquid remaining inside the reservoir 21, which is not removed. As the liquid in the liquid storage container 21 increases, the center of gravity of the liquid storage container 21 gradually rises and is higher than the coupling shaft 22 of the liquid storage container 21. At this time, the liquid storage container 21 is in an unstable state, and as the liquid in the liquid storage container 21 further increases, when the entire liquid storage container 21 reaches a critical weight, the liquid storage container 21 is tilted to discharge the liquid, and the liquid storage container 21 is turned over around the coupling shaft 22, and due to inertia, the liquid storage container is turned over several turns and then returns to a state in which the opening faces upward. When stock solution container 21 overturns, can produce mechanical energy, the utility model discloses a purpose just lies in concentrating through stock solution container 21 and stores liquid and with liquid discharge, increases the mechanical energy that liquid energy collection system single produced from this (stock solution container 21 overturns produced mechanical energy promptly), the collection efficiency of improvement energy.

Since the center of gravity of the liquid storage container 21 at the time of idling changes with the change in the shape of the container, it is difficult to obtain it by calculation. In order to adjust the center of gravity of the liquid storage container 21, a first mass block 23 is disposed on the liquid storage container 21. The first mass 23 may be disposed at any position of the liquid reservoir 21, preferably, the first mass 23 is disposed below the coupling shaft 22, such as on a sidewall of the liquid reservoir 21 below the coupling shaft 22, and further preferably, the first mass 23 may be disposed at the bottom of the liquid reservoir 21. Through setting up first quality piece 23, not only can adjust the focus of liquid storage container 21, can adjust the slope of the axle center of liquid storage container 21 relative to vertical direction moreover, for example when first quality piece 23 is located one side of the bottom of liquid storage container 21, the axle center of liquid storage container 21 inclines relative to vertical direction, and this is favorable to liquid storage container 21 to overturn after the liquid that its storage reaches the critical value.

To facilitate adjustment of the center of gravity of the reservoir 21, the position of the first mass 23 may be adjusted. If can inlay the thin slice that the one deck can be adsorbed by magnet in the bottom of liquid storage container 21, like iron sheet etc. first quality piece 23 is the magnet to direct absorption is in the bottom of liquid storage container 21, when the position that needs to change first quality piece 23, can readjust the position of magnet. Of course, the first mass 23 may also be made of other materials such as polyurethane, nylon, POM, etc. and is attached to the bottom of the liquid storage container 21 by gluing.

Next, an example in which the vibration unit 300 is driven to vibrate by the liquid reservoir 2 will be described.

Fig. 2 and 3 show an embodiment of the liquid energy collecting device, and referring to fig. 2 and 3, the mount 1 is provided with a first vibrating portion 3, the first vibrating portion 3 is provided with a first piezoelectric element 31, and when the liquid reservoir portion 2 is inverted, the liquid reservoir portion 2 intermittently drives the first vibrating portion 3 to vibrate. Preferably, the first vibration part 3 is provided on a reverse path LS (refer to fig. 1 (b)) of the bottom of the liquid reservoir 2 (i.e., a virtual circle drawn by reversing the position of the liquid reservoir 2 farthest from the axial center of the coupling shaft 22 when the liquid reservoir 2 is reversed about the axial center of the coupling shaft 22), and when the liquid reservoir 2 is reversed, the bottom of the liquid reservoir 2, in this case, the bottom 21a of the liquid reservoir 21 hits the first vibration part 3, and more preferably, when the liquid reservoir 2 is reversed, only the bottom 21a of the liquid reservoir 21 hits the first vibration part 3, and the opening 21b or other places do not hit the first vibration part 3. By such intermittent striking, it is ensured that each vibration of the first vibrating portion 3 can be continued for a sufficiently long vibration time.

The first vibrating portion 3 further includes a first vibrating member 32, one end of the first vibrating member 32 is mounted on the mounting member 1, the other end of the first vibrating member 32 is a cantilever end, and the first piezoelectric element 31 is provided on the first vibrating member 32, preferably, the first piezoelectric element 31 is provided on the cantilever end of the first vibrating member 32. The first vibrating member 32 is preferably made of a rigid material such as a long stainless steel plate, and vibrates in bending. Of course, the first vibration member 32 may be an elastic member such as a round bar of rubber material, depending on the application. When the liquid reservoir 2 is inverted, the liquid reservoir 21 hits the tip end portion 32a of the first vibrator 32.

Preferably, the liquid storage container 21 hits the first vibration part 3 at a position higher than the turning axis of the liquid storage part 2. Namely: the tip end portion 32a of the first vibrating member 32 is vertically higher than the coupling shaft 22 in order to increase the stroke from the bottom portion 21a of the liquid reservoir 21 to the tip end portion 32a of the first vibrating member 32 before the liquid reservoir 21 is tipped over, ensuring that the first vibrating member 32 is hit when the kinetic energy of the liquid reservoir 21 is sufficiently large.

Preferably, the area of the cross section of the liquid storage container 21 is gradually reduced from the opening portion 21b toward the bottom portion 21a, which is to facilitate the inversion of the liquid storage part 2, and at the same time, since the area of the cross section of the bottom portion of the liquid storage container 21 is smaller than the area of the cross section of the opening portion, the coupling shaft 22 can be disposed closer to the opening portion 21b and away from the bottom portion 21a, ensuring that only the bottom portion 21b of the liquid storage container 21 can strike the first vibrating member 32.

Preferably, a second vibration part 4 is installed at a lower portion of the mounting member 1, and the second vibration part 4 includes a second piezoelectric element 41 and

and a second vibrating member 42, wherein one end 421 of the second vibrating member 42 is mounted to the lower part of the mounting member 1, and the other end 422 of the second vibrating member 42 is a cantilever end. The second piezoelectric element 41 is disposed on the cantilever end 422 of the second vibrating member 42, and the second vibrating member 42 is preferably made of a rigid material, such as an elongated stainless steel plate, and vibrates in bending. Of course, the second vibration member 42 may be an elastic member such as a round bar of rubber material, etc., depending on the application. The cantilever end 422 of the second vibrating member 42 extends to below the liquid reservoir 21, preferably, directly below the liquid reservoir 21. When the liquid storage container 21 is turned over, the liquid poured from the liquid storage container 21 can directly impact the second vibrating member 42, so that the second vibrating member 42 vibrates, and the vibration energy of the second vibrating member 42 is collected by the second piezoelectric element 41. Because when the liquid storage container 21 overturns, a large amount of liquid is poured out at the same time, the vibration amplitude of the second vibrating piece 42 can be greatly improved, and the collection efficiency of the piezoelectric element is improved.

The reservoir 2 may be attached to the mounting member 1 by the third vibrating portion 6. The third vibrating portion 6 includes a third vibrator 61 and a third piezoelectric element 62, the third piezoelectric element 62 is provided on the third vibrator 61, one end of the third vibrator 61 is attached to the mounting member 1, the other end of the third vibrator 61 is cantilevered, and the reservoir portion 2 is attached to the cantilevered end of the third vibrator 61. Preferably, the third vibrating member 61 includes two pieces, the third vibrating members 61 are parallel to each other, the liquid storage part 2 is located between the two third vibrating members 61, and the liquid storage part 2 is hinged to the cantilever ends of the third vibrating members 61 through two coupling shafts 22. The third vibrating member 61 is preferably made of a rigid material such as a long stainless steel plate, and vibrates in bending.

When the liquid storage portion 2 is empty (i.e., no liquid is stored or a small amount of liquid is stored), the liquid storage portion 2 and the third vibrating member 61 are in a balanced state, the third vibrating member 61 is in a state of being slightly bent downward under the action of the self-weight of the liquid storage portion 2, when the liquid stored in the liquid storage portion 2, such as rainwater stored in the liquid storage container 21, is gradually increased, the third vibrating member 61 is deformed under the action of the gravity of the liquid storage portion 2, on the one hand, the deformation of the third vibrating member 61 is gradually increased, on the other hand, the relative position of the gravity center of the liquid storage portion 2 and the coupling shaft 22 (i.e., the shaft center of inversion) is also changed, so that the position of the opening portion 21b of the liquid storage container 21 is gradually changed, when the liquid storage portion 2 discharges the liquid when the liquid stored therein reaches a critical weight (i.e., when the weight causes the opening of the liquid storage container 21 to start to face downward), at this time, the gravity applied to the third vibrator 61 is suddenly lowered, the third vibrator 61 generates bending vibration, and the bending vibration is continuously performed by inertia until the liquid reservoir 2 is restored to a state in which the opening is directed upward. In this process, the third piezoelectric element 62 can convert the vibration mechanical energy of the third vibration member 61 into an alternating current electric energy for output due to the piezoelectric effect.

The mounting device 1 may be a cantilever member, one end of the mounting device 1 is fixed to the base 51, the other end of the mounting device 1 is a cantilever end, the mounting device 1 is provided with a fourth piezoelectric element 52 at a position close to the base 51, the third vibration part 6 is mounted on the mounting device 1, and the first vibration part 3, the second vibration part 4, and the liquid reservoir part 2 are mounted on the cantilever end of the third vibration part 6, respectively. Thus, when the reservoir portion 2 is turned upside down, the mounting member 1 generates flexural vibration as well as the third vibrating member 61, and the flexural vibration is continued by inertia until the reservoir portion 2 returns to the state in which the opening faces upward. In this process, the fourth piezoelectric element 52 can convert the vibration mechanical energy of the mount 1 into an alternating current electric energy output due to the piezoelectric effect.

Therefore, in the above various embodiments, only one liquid storage part 2 is needed to realize the vibration of the plurality of vibration parts, and thus the mechanical energy of the vibration is converted into the electric energy through the plurality of piezoelectric elements, so that the collected energy is large, and the energy conversion efficiency is further improved.

The various features described in the foregoing detailed description may be combined in any manner and, for the sake of unnecessary repetition, the invention is not limited in its scope to the particular combinations illustrated.

The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement that does not depart from the scope of the present invention should be construed as being included in the technical solutions of the present invention.

Claims (10)

1. The liquid energy collecting device is characterized by comprising

A mounting member;

a liquid storage part which is installed on the installation part in a turnable manner and turns over and discharges liquid when the liquid stored in the liquid storage part reaches a preset weight;

the first vibration part is installed on the installation part, a first piezoelectric element is arranged on the first vibration part, and the liquid storage part intermittently impacts the first vibration part when being overturned.

2. The fluid energy harvesting device of claim 1, wherein the first vibrating portion is disposed in an inverted path of a bottom of the reservoir, the bottom of the reservoir striking the first vibrating portion when the reservoir is inverted.

3. The fluid energy harvesting device of claim 2, wherein the reservoir portion impacts the first vibrating portion at a location higher than an axis of inversion of the reservoir portion.

4. The fluid energy collection device according to claim 2 or 3, wherein the reservoir includes a reservoir having a cross-sectional area that gradually decreases from the opening portion toward the bottom portion.

5. The liquid energy harvesting device according to any one of claims 1 to 3, wherein the first vibrating portion includes a first vibrating member, one end of the first vibrating member is mounted on the mounting member, the other end of the first vibrating member is in a cantilever shape, and the first piezoelectric element is provided on the first vibrating member.

6. The fluid energy harvesting device according to claim 1, wherein a second vibration portion is provided below the reservoir portion, the second vibration portion including a second piezoelectric element and a second vibrating member, the second vibrating member being attached to the attachment member, the second piezoelectric element being attached to the second vibrating member.

7. The fluid energy harvesting device according to claim 6, wherein one end of the second vibrator is attached to the attachment member, the other end of the second vibrator is cantilevered, the cantilevered end of the second vibrator is located below the reservoir, and the piezoelectric element is attached to the cantilevered end of the second vibrator.

8. The liquid energy harvesting device according to claim 4, further comprising a third vibrating portion including a third vibrating member and a third piezoelectric element, one end of the third vibrating member being mounted on the mounting member, the other end of the third vibrating member being cantilevered, the third piezoelectric element being provided on the third vibrating member, the liquid reservoir portion being mounted on the cantilevered end of the third vibrating member.

9. The fluid energy collection device as defined in claim 8, wherein the third vibrating member includes two locations, the liquid reservoir is located between the two locations of the third vibrating member, and the liquid reservoirs are respectively hinged to the third vibrating members.

10. The fluid energy collection device of claim 1, 2, 3, 6, 7, 8, or 9, further comprising a base and a fourth piezoelectric element, wherein the fourth piezoelectric element is disposed on the mounting member, one end of the mounting member is fixed to the base, the other end of the mounting member is cantilevered, and the reservoir and the first vibrating portion are respectively mounted on the cantilevered end of the mounting member.

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