CN216086506U

CN216086506U - Cable type pavement piezoelectric energy collecting device

Info

Publication number: CN216086506U
Application number: CN202122264476.4U
Authority: CN
Inventors: 曹国栋; 王铁; 吉志勇; 马好娜; 陈尧; 赵震
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-03-18
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a cable type pavement piezoelectric energy collecting device which is characterized by comprising an energy conversion part and an energy collection part; the energy conversion part consists of a piezoelectric unit, a flexible mandrel and a shaping shell; the piezoelectric unit comprises a piezoelectric body, a supporting body and a rectifying body; the piezoelectric body is in a fan blade-shaped structure, a plurality of arch-shaped piezoelectric fan blades are uniformly distributed on the upper circumference of the piezoelectric body, piezoelectric piece substrates are installed on the arch-shaped piezoelectric fan blades, and piezoelectric pieces are embedded in the piezoelectric piece substrates; the energy collecting part comprises a super capacitor, a DC/DC converter and a storage battery and is used for converting and storing the electric energy generated by the energy converting part. The device can convert the road surface pressure into electric energy, and has the characteristics of small volume, high recovery efficiency, small road destructiveness and the like.

Description

Cable type pavement piezoelectric energy collecting device

Technical Field

The utility model relates to the technical field of energy recovery, in particular to a cable type pavement pressure power generation device.

Background

With the rapid development of social economy, the energy demand is increasing rapidly day by day, the traditional energy reserves are exhausted day by day, and the recycling of energy is an important way for solving the energy crisis. In recent years, the construction of national road traffic systems is improved continuously, and the total distance of the national roads reaches 501.25 multiplied by 10 by the end of 2019⁴km, the number of motor vehicles in the country in the early 2020 is up to 3.72 hundred million, and such a huge road traffic system provides a huge energy source for recycling road surface energy, so that the road surface energy recycling technology is receiving wide attention.

The existing pavement energy recovery device taking the piezoelectric patches as the core has developed a piezoelectric patch stacking type and an array type and a piezoelectric material and pavement material integrated type, and mainly utilizes the positive piezoelectric effect of the piezoelectric patches to convert the pressure of a vehicle acting on a pavement into electric energy, but most of the energy recovery devices are large in size, complex in laying, poor in flexibility and serious in damage to the pavement due to improper installation.

Disclosure of Invention

In conclusion, the cable type pavement piezoelectric energy collecting device provided by the utility model is high in practicability and energy collecting efficiency. The device mainly adopts structural design such as flexible dabber, piezoelectricity body, supporting body, two-stage energy storage component, improves road surface pressure energy recovery efficiency and practicality.

The utility model is realized by adopting the following technical scheme: a cable type pavement piezoelectric energy collecting device comprises an energy conversion part and an energy collection part; the energy conversion part comprises a piezoelectric unit, a flexible mandrel and a shaping shell; the energy conversion part adopts a structural form that a flexible mandrel penetrates through the center of the piezoelectric unit and the outermost layer is wrapped by a shaping shell, and a plurality of piezoelectric units and the flexible mandrel are connected into a whole; the shaping shell is used for protecting the energy conversion part and positioning the piezoelectric unit on the flexible mandrel; the structural design can lead the energy conversion part to be arranged in a bending way at any angle in the horizontal plane, thus improving the arrangement flexibility of the device; the energy collecting part is used for converting and storing the electric energy generated by the energy converting part.

Furthermore, the piezoelectric unit comprises a piezoelectric body, a bearing body and a rectifier body, the piezoelectric body and the bearing body are alternately arranged, and the rectifier body is positioned between the bearing body and the piezoelectric body; the piezoelectric body generates deformation and generates electric energy after being pressed; the bearing body is used for bearing the load transmitted from part of the ground to the energy conversion part, adjusting the bearing deformation amplitude of the piezoelectric body and avoiding the excessive deformation of the piezoelectric body; the rectifier is used for converting alternating current generated by the piezoelectric body after being pressed and deformed into direct current and transmitting the direct current to the energy collection part.

Furthermore, the piezoelectric body is of a fan blade-shaped structure and comprises a piezoelectric body inner ring, a piezoelectric body outer ring and an arched piezoelectric fan blade; the plurality of arched piezoelectric fan blades are uniformly arranged between the inner ring of the piezoelectric body and the outer ring of the piezoelectric body; the arched piezoelectric fan blade is provided with a piezoelectric patch base, and a piezoelectric patch is embedded in the piezoelectric patch base. The structural design can ensure that the device can be in a working state after the energy conversion part rotates for any angle in a circle and is arranged in parallel, thereby being convenient for the laying of the device.

Furthermore, the arched piezoelectric fan blade has elasticity, and can restore to an initial shape after the pressure of the road surface disappears; the arched piezoelectric fan blade is provided with a piezoelectric piece base mounting groove, a piezoelectric piece base fixing groove is arranged at the position, close to the inner ring of the piezoelectric body, of the piezoelectric piece base mounting groove, and a semi-cylindrical bulge is arranged at the position, close to the outer ring of the piezoelectric body, of the piezoelectric piece base mounting groove; the piezoelectric piece base is inserted into the piezoelectric piece base mounting groove from the side surface of the arched piezoelectric fan blade and is positioned through the piezoelectric piece base fixing groove to form a cantilever beam structure; after the piezoelectric body is pressed, the piezoelectric piece base in the piezoelectric piece base mounting groove is stressed and vibrated, and then the piezoelectric piece is deformed and generates current.

Furthermore, the piezoelectric patch base is of an elastic folded structure, the tail end of an opening of the piezoelectric patch base is provided with a bulge, and the piezoelectric patch is embedded in the middle of the piezoelectric patch base.

Furthermore, the piezoelectric sheets in each piezoelectric body of the piezoelectric unit are connected in series and then connected in parallel, and then are connected to the bus inside the flexible mandrel in a series-parallel connection mode, so that the electric energy output effect is improved.

Furthermore, the energy collection part adopts two-stage energy storage elements, the first-stage energy storage element is a super capacitor and has the characteristics of high charge and discharge rate and long service life, the second-stage energy storage element is a storage battery and has the characteristic of stable supply voltage, and the second-stage energy storage elements work cooperatively to achieve the purpose of efficiently collecting and utilizing electric energy.

Compared with the prior art, the utility model has the following beneficial effects:

1. the cable type structure with the flexible mandrel is adopted, so that the piezoelectric cable can be arranged in a bending mode at any angle in the horizontal plane, and the arrangement flexibility of the device is improved.

2. The fan-shaped piezoelectric body structure design with the piezoelectric piece base mounting groove is adopted, the energy conversion part can be enabled to rotate for any angle in a circle and be parallelly arranged, the device can be in a working state, the laying of the device is facilitated, after the device bears road surface pressure, the piezoelectric pieces in the working state in the piezoelectric body can continuously vibrate and generate electric energy, and the power generation capacity of the device is improved.

3. By adopting the structural design of the bearing body, the material rigidity of the bearing body can be properly adjusted according to the road surface pressure and the mechanical characteristics of the road surface material, and the environmental adaptability of the device is improved.

4. A two-stage energy storage mode of a super capacitor and a storage battery is adopted, so that the electric energy storage efficiency is effectively improved, and the output voltage is stabilized.

Drawings

Fig. 1 is a schematic diagram of an embodiment of a cable type pavement pressure power generation device according to an embodiment of the utility model.

Fig. 2 is a schematic structural diagram of a piezoelectric unit and a flexible mandrel according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a piezoelectric body according to the present invention.

Fig. 4 is a schematic structural diagram of a base of a piezoelectric sheet according to the present invention.

FIG. 5 is a schematic diagram of the stress of the arched piezoelectric fan blade structure according to the present invention.

Fig. 6 is a schematic diagram of a road paving embodiment of the cable type road surface pressure power generation device in the utility model.

Reference numerals are respectively shown as

The piezoelectric energy-saving device comprises a 1-energy conversion part, a 2-piezoelectric unit, a 3-flexible mandrel, a 4-shaping shell, a 5-energy collection part, a 6-piezoelectric body, a 7-supporting body, an 8-rectifying body, a 9-piezoelectric body inner ring, a 10-piezoelectric body outer ring, 11-arched piezoelectric fan blades, a 12-piezoelectric sheet base mounting groove, a 13-semi-cylindrical bulge, a 14-fixed seat, a 15-piezoelectric sheet base, a 16-bulge, a 17-piezoelectric sheet, an 18-horizontal through hole, a 19-first through hole, a 20-second through hole, a 21-bus hole, a 22-bus, a 23-lead, a 24-asphalt pavement layer, a 25-pavement base layer, a 26-pavement and a 27-pavement line.

Detailed Description

The technical solutions in the embodiments of the present application are described in detail below with reference to the drawings in the embodiments of the present application, and the described implementations are only for explaining the present invention and do not limit the present invention.

As shown in fig. 1 and fig. 2, the embodiment of the present invention provides a cable type pavement piezoelectric energy collecting device, which includes two parts, namely energy conversion and energy collection; the energy conversion part comprises a piezoelectric unit 2, a flexible mandrel 3 and a shaping shell 4; the piezoelectric unit 2 comprises a piezoelectric body 6, a supporting body 7 and a rectifying body 8, a plurality of arch-shaped piezoelectric fan blades 11 are distributed on the circumference of the piezoelectric body 6, piezoelectric sheet base mounting grooves 12 are formed in the arch-shaped piezoelectric fan blades 11, piezoelectric sheet bases 15 are inserted into the piezoelectric sheet base mounting grooves 12, and piezoelectric sheets 17 are embedded in the piezoelectric sheet bases 15; the energy collection part comprises a super capacitor, a DC/DC converter and a storage battery; the energy collecting part is connected to the tail end of the energy conversion part and converts and stores the electric energy generated by the energy conversion part.

The energy conversion part 1 comprises a piezoelectric unit 2, a flexible mandrel 3 and a shaping shell 4; the flexible mandrel 3 penetrates through a central mounting hole of the piezoelectric unit, the piezoelectric units 2 are distributed on the flexible mandrel 3 at intervals, and the outer layers of the flexible mandrel 3 and the piezoelectric units 2 are wrapped with a shaping shell 4; preferably, the flexible mandrel 3 is made of rubber, and the shaping shell 4 is made of heat-shrinkable rubber; the energy conversion part 1 can be bent and arranged at any angle in a horizontal plane through the flexible mandrel 3, and the shaping shell 4 is used for protecting the energy conversion part 1 and fixing the position of the piezoelectric unit 2 on the flexible mandrel 3.

Preferably, each piezoelectric unit 2 is internally provided with one rectifier 8, three piezoelectric bodies 6 and four supporting bodies 7; in the piezoelectric unit 2, the supporting bodies 7 and the piezoelectric bodies 6 are alternately arranged from left to right, the rectifier 8 is sleeved on the inner ring at the left end of the first piezoelectric body, and the diameter of the mounting hole of the rectifier 8 is equal to the outer diameter of the inner ring 9 of the piezoelectric body; preferably, the piezoelectric body 6 is made of elastic spring steel, the supporting body 7 is a disc-shaped structure made of elastic rubber, the supporting body 7 is used for bearing a vertical load transmitted to the energy conversion part 1 from part of the ground, the supporting deformation amplitude of the piezoelectric body 6 is adjusted, the piezoelectric body 6 is prevented from being excessively deformed to damage the piezoelectric sheet 17, the piezoelectric body 6 and the supporting body 7 are ensured to be restored to the initial state after the road surface pressure disappears, and the rectifier 8 is used for collecting alternating current generated by the piezoelectric sheet 17 after being deformed by pressure and converting the alternating current into direct current to be transmitted to the energy collection part 5.

As shown in fig. 3, each piezoelectric body 6 has a fan-blade-shaped structure, and each piezoelectric body 6 includes a piezoelectric inner ring 9, a piezoelectric outer ring 10, and an arched piezoelectric fan blade 11; preferably, eight arc-shaped piezoelectric fan blades 11 are arranged in the piezoelectric body, the arc-shaped piezoelectric fan blades 11 are uniformly arranged between the piezoelectric body inner ring 9 and the piezoelectric body outer ring 10 along the circumference, the piezoelectric body inner ring 9 is in contact with the flexible core shaft 3, and the piezoelectric body outer ring 10 is in contact with and fixedly connected with the shaping shell 4; the inner diameters of the piezoelectric inner ring 9 and the carrier 7 are equal to the size of the central mounting hole of the piezoelectric unit 2, and the outer diameter of the piezoelectric outer ring 10 is equal to the size of the outer diameter of the carrier 7.

A piezoelectric sheet base mounting groove 12 is formed in the arched piezoelectric fan blade 11, a semi-cylindrical protrusion 13 and a fixed seat 14 are arranged in the piezoelectric sheet base mounting groove 12, and two symmetrical fixed grooves are formed in the fixed seat 14; the semi-cylindrical protrusion 13 is located on the inner wall of the piezoelectric sheet base mounting groove 12, specifically, the position is the position corresponding to the convex side end of the piezoelectric sheet base 15, and the fixing seat 14 is located on the side close to the piezoelectric inner ring 9 inside the piezoelectric sheet base mounting groove 12.

As shown in fig. 4, the piezoelectric sheet base 15 and the piezoelectric sheet 17 are preferably in an arch shape, the piezoelectric sheet base 15 is in an elastic folded structure, the piezoelectric sheet 17 is embedded in the middle of the piezoelectric sheet base 15, and two sides of the opening end of the piezoelectric sheet base 15 are respectively provided with a protrusion 16. After the open end of the piezoelectric patch base 15 is pressed and closed, the bulge 16 is inserted into the piezoelectric patch base mounting groove 12 along the fixing groove on the fixing seat 14, and the fixing seat 14 and the piezoelectric patch base 15 are assembled in an interference fit mode to play a role in fixing the position of the piezoelectric patch base 15; a certain gap is reserved between the tail end of the piezoelectric sheet base 15 and the piezoelectric sheet base mounting groove 12.

As shown in FIG. 5, the arched piezoelectric fan blade 11 is under three stress states. As shown in fig. 5 (a), the arched piezoelectric fan blade 11 is in a free state without stress, and at this time, a certain gap exists between the piezoelectric sheet base 15 and the semi-cylindrical protrusion 13 and between the piezoelectric sheet base and the wall surface of the piezoelectric sheet base mounting groove 12, so that the piezoelectric sheet base 15 can vibrate freely inside the piezoelectric sheet base mounting groove 12. As shown in fig. 5(b), the convex end of the arched piezoelectric fan blade 11 is bent clockwise after being pressed, and then the piezoelectric sheet base 15 is bent clockwise under the action of the semi-cylindrical protrusion 13, so that the piezoelectric sheet 17 is bent clockwise, after the pressure disappears, the piezoelectric sheet base mounting groove 12 is restored to the original shape, and the piezoelectric sheet base 15 performs cantilever beam type damping vibration inside the piezoelectric sheet base mounting groove 12, so that the piezoelectric sheet 17 is continuously vibrated and deformed to generate alternating current; as shown in fig. 5(c), the concave end of the arched piezoelectric fan blade 11 is pressed and then bent in the counterclockwise direction, the two sides of the piezoelectric sheet base mounting groove 12 tend to be straightened, and the piezoelectric sheet base 15 is further away from the semi-cylindrical protrusion 13 to maintain the initial shape, so that the piezoelectric sheet 17 is not deformed. Through the structural form of the piezoelectric sheet base mounting groove 12 and the stress deformation state of the arched piezoelectric fan blade 11, the piezoelectric sheet 17 in the working state continuously vibrates to generate alternating current after the piezoelectric body 6 is pressed, and the piezoelectric energy collecting effect is improved.

As shown in fig. 2, a horizontal through hole 18 is formed on the supporting body 7 inside the piezoelectric unit 2 near the flexible mandrel 3; two first through hole 19 are arranged at the inner ring 9 of the piezoelectric body 6 at the left end of the piezoelectric unit 2, and the two first through hole 19 are arranged on different sides; two bus holes 21 are arranged in the flexible mandrel 3, and second through holes 20 are respectively arranged on the flexible mandrel 3 at positions corresponding to the two first through holes 19 and communicated with the bus holes 21 in the flexible mandrel 3; three piezoelectric patches 17 at the same horizontal position on three piezoelectric bodies 6 in a piezoelectric unit 2 are connected in series into a group through a lead 23 and a corresponding horizontal through hole 18 and then connected into a rectifier 8 for rectification, eight groups of piezoelectric patches 17 connected in series circumferentially are connected in parallel into a bus 22 in a flexible mandrel 3 through the lead 23, a first through hole 19 and a second through hole 20 to form a series-parallel connection circuit, electric energy is transmitted to an energy collection part 5 through the bus 22 in the flexible mandrel 3 for conversion and storage, and the electric energy recovery efficiency is improved.

As shown in fig. 6, the energy conversion part 1 is disposed between the asphalt pavement layer 24 and the road base layer 25 in a serpentine arrangement manner, and the serpentine arrangement distance of the energy conversion part 1 can be set according to the traffic flow and the speed of the road, so as to improve the energy collection efficiency of the energy conversion part 1.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a cable type road surface piezoelectric energy collection device which characterized in that: comprises an energy conversion part (1) and an energy collection part (5); the energy conversion part (1) comprises a piezoelectric unit (2), a flexible mandrel (3) and a shaping shell (4); the energy conversion part (1) adopts a structural form that a flexible mandrel (3) penetrates through the center of the piezoelectric units (2) and the outermost layer is wrapped by a shaping shell (4), and a plurality of piezoelectric units (2) and the flexible mandrel (3) are connected into a whole; the shaping shell (4) is used for protecting the energy conversion part and positioning the piezoelectric unit (2) on the flexible mandrel (3); the energy collecting part (5) is used for converting and storing the electric energy generated by the energy conversion part (1).

2. The cable type pavement piezoelectric energy collecting device according to claim 1, wherein: the piezoelectric unit (2) comprises a piezoelectric body (6), a supporting body (7) and a rectifying body (8), the piezoelectric body (6) and the supporting body (7) are alternately arranged, and the rectifying body (8) is positioned between the supporting body (7) and the piezoelectric body (6); the piezoelectric body (6) generates deformation and generates electric energy after being pressed; the bearing body (7) is used for bearing the load transmitted from part of the ground to the energy conversion part (1), adjusting the bearing deformation amplitude of the piezoelectric body (6) and avoiding the excessive deformation of the piezoelectric body (6); the rectifier (8) is used for converting alternating current generated by the piezoelectric body (6) after being pressed and deformed into direct current and transmitting the direct current to the energy collecting part.

3. The cable type pavement piezoelectric energy collecting device according to claim 2, wherein: the piezoelectric body (6) is of a fan-blade-shaped structure and comprises a piezoelectric inner ring (9), a piezoelectric outer ring (10) and an arched piezoelectric fan blade (11); a plurality of arched piezoelectric fan blades (11) are uniformly arranged between the piezoelectric inner ring (9) and the piezoelectric outer ring (10); the arched piezoelectric fan blade (11) is provided with a piezoelectric sheet base (15), and a piezoelectric sheet (17) is embedded in the piezoelectric sheet base (15).

4. The cable type pavement piezoelectric energy collecting device according to claim 3, wherein: the arched piezoelectric fan blades (11) have elasticity, and can restore to an initial shape after the pressure of a road surface disappears; a piezoelectric piece base mounting groove (12) is formed in the arched piezoelectric fan blade (11), a piezoelectric piece base fixing groove is formed in the piezoelectric piece base mounting groove (12) close to the piezoelectric inner ring (9), and a semi-cylindrical protrusion (13) is formed in the piezoelectric outer ring (10) close to the piezoelectric inner ring; the piezoelectric piece base (15) is inserted into the piezoelectric piece base mounting groove (12) from the side surface of the arched piezoelectric fan blade and is positioned through the piezoelectric piece base fixing groove to form a cantilever beam structure; the structure can ensure that the piezoelectric sheet base (15) in the piezoelectric sheet base mounting groove (12) is stressed and vibrated after the piezoelectric body is pressed, so that the piezoelectric sheet (17) is deformed and generates current.

5. The cable type pavement piezoelectric energy collecting device according to claim 4, wherein: the piezoelectric piece base (15) is of an elastic folded structure, the tail end of an opening of the piezoelectric piece base is provided with a bulge (16), and the piezoelectric piece (17) is embedded in the middle of the piezoelectric piece base (15).

6. The device for collecting piezoelectric energy from road surface as claimed in claim 3, 4 or 5, wherein: the piezoelectric sheets (17) in each piezoelectric body (6) in the piezoelectric unit (2) are connected in series and then connected in parallel, and then are connected to the bus (22) in the flexible core shaft (3) in a series-parallel connection mode, so that the electric energy output effect is improved.

7. The piezoelectric energy collecting device for a cable road surface according to claim 1, 2, 3, 4 or 5, wherein: the energy collection part (5) adopts two stages of energy storage elements, the first stage of energy storage element is a super capacitor, the second stage of energy storage element is a storage battery, the electric energy storage efficiency is improved, and the output voltage is stabilized.