Self-powered device for sewage treatment system

Abstract

The invention belongs to the field of sewage treatment, and particularly relates to a self-powered device for a sewage treatment system, comprising: a spherical shell comprising an upper shell and a lower shell, the top of the upper shell being provided with a through hole; the fixing part is hung in the spherical shell through a connecting rope; the power generation components are distributed and fixed on the inner surface of the spherical shell in an annular array; the number of the connecting rods is multiple, the first end of each connecting rod is fixed to the fixing component, and the second end of each connecting rod is fixed to the power generation component; the first end of the wire is connected to the power generation component, and the second end passes through the through hole; the power generation component is formed by alternately folding positive electrode strips and negative electrode strips; under the action of external force, the fixing part can move relative to the spherical shell so as to drive the connecting rod to do telescopic motion, the telescopic motion can make the positive electrode strip and the negative electrode strip of the power generation part make contact-separation motion, and then current is generated and output along the wire. The device is simple in structure, high in stability and high in conversion efficiency.

Description

Technical Field

[0001] The present application relates to the field of sewage treatment, and in particular to a self-powered device for a sewage treatment system. Background Art

[0002] Urban sewage treatment plants are the key to controlling pollutant emissions, but in the sewage treatment process, the removal effect of new pollutants is limited, which inevitably leads to their coexistence in tailwater and their continuous detection in natural water bodies. Long-term exposure of humans or animals to an environment polluted by these new pollutants may cause chronic poisoning or even induce cancer. Therefore, as people pay more attention to environmental safety and the demand for sewage reuse increases, strengthening the removal of new pollutants in urban sewage treatment plants is of great significance to the scientific implementation of the action plan for the control of new pollutants.

[0003] The use of electrocatalytic oxidation technology to remove new pollutants has become a research hotspot in recent years, but from the perspective of industry and practical application, electrocatalysis in sewage treatment still faces the problem of high energy consumption. Therefore, combining electrocatalytic oxidation technology with recyclable energy (such as water wave energy and potential energy) in sewage treatment, thereby making full use of the energy input of recyclable energy, is the key to improving the high energy consumption of electrocatalysis in sewage treatment. At present, the electricity consumption of sewage treatment in my country has exceeded 1.0×10^10kWh, showing huge energy-saving space and energy recycling potential. However, due to the low-frequency, scattered and unstable characteristics of water wave energy in sewage treatment, it is difficult for traditional hydropower generators to effectively convert and utilize this energy.

[0004] Based on this, the present application proposes a self-powered device for a sewage treatment system. Summary of the invention

[0005] In view of this, an embodiment of the present application provides a self-powered device for a sewage treatment system, which is used in the aeration stage of a sewage treatment plant and the electrocatalytic removal of pollutants in the tail water of a sewage treatment plant, so as to efficiently recover the water wave energy in the aeration stage of sewage treatment, and provide new ideas for the application of low-carbon sewage treatment technology and the protection of water ecological safety.

[0006] The present application embodiment adopts the following technical solutions:

[0007] The present application provides a self-powered device for a sewage treatment system, the device comprising:

[0008] A spherical shell, the spherical shell comprising an upper shell and a lower shell, and a through hole is provided on the top of the upper shell;

[0009] A fixing component, the fixing component is suspended inside the spherical shell through a connecting rope;

[0010] A power generation component, wherein the power generation components are multiple and distributed in an annular array and fixed on the inner surface of the upper shell and / or the lower shell;

[0011] A connecting rod, wherein there are a plurality of connecting rods, a first end of each connecting rod is fixed to the fixing component, and a second end of each connecting rod is fixed to the power generation component;

[0012] Conductive wires, wherein the first ends of the conductive wires are respectively connected to the power generation components, and the second ends of the conductive wires pass through the through holes provided on the top of the upper shell;

[0013] Among them, the power generation component includes positive electrode strips and negative electrode strips, and the positive electrode strips and the negative electrode strips are alternately folded and arranged; under the action of external force, the fixed component can move relative to the spherical shell to drive the connecting rod to perform telescopic movement, and the telescopic movement can cause the positive electrode strips and the negative electrode strips of the power generation component to perform contact-separation movement, thereby generating current and outputting it along the wire.

[0014] In a specific embodiment, the fixing component is a sphere with a set weight, and the connecting rods are distributed and fixed on the sphere in a manner corresponding to the distribution manner of the power generation components;

[0015] Wherein, a hanging ring is arranged on the top of the sphere, one end of the connecting rope is fixed on the hanging ring, and the other end of the connecting rope is fixed to the inner surface of the upper shell.

[0016] In a specific embodiment, the fixing component comprises a shell surrounded by an upper half shell and a lower half shell, the interior of the shell is used to place a ball with a set weight, and the connecting rods are distributed and fixed on the upper half shell and / or the lower half shell in a manner corresponding to the distribution manner of the power generation components;

[0017] Wherein, a lifting ring is arranged on the top of the upper half shell, one end of the connecting rope is fixed on the lifting ring, and the other end of the connecting rope is fixed to the inner surface of the upper shell body.

[0018] In a specific embodiment, the inner surface of the upper shell and / or the lower shell is provided with a plurality of raised platforms distributed in a ring array.

[0019] The power generation component is fixed on the raised platform so that the power generation component can be attached to the inner surface of the lower shell.

[0020] In a specific embodiment, a fixing platform is provided at the second end of each of the connecting rods, and the fixing platform is used for fixed connection with the power generation component.

[0021] In a specific embodiment, the positive electrode strip is made of two positive electrode materials covered on a double-sided conductive copper foil tape.

[0022] In a specific embodiment, the positive electrode material is a nylon film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm;

[0023] The nylon film with a thickness of 0.05 mm is pasted on two opposite sides of a double-sided conductive copper foil tape with a thickness of 0.06 mm.

[0024] In a specific embodiment, the negative electrode strip is made of two negative electrode materials covered on a double-sided conductive copper foil tape.

[0025] In a specific embodiment, the negative electrode material is a fluorinated ethylene propylene film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm;

[0026] The fluorinated ethylene propylene film with a thickness of 0.05 mm is pasted on two opposite sides of a double-sided conductive copper foil tape with a thickness of 0.06 mm.

[0027] In a specific embodiment, a hanging rod or a hanging rope is provided above the aeration tank of the sewage treatment system, and the self-powered device can be hung on the hanging rod or the hanging rope by means of a rope, and the spherical shell of the self-powered device floats on the water surface of the aeration tank;

[0028] Under the action of water wave force in the aeration tank, the self-powered device can swing within the range limited by the rope, so that the fixed component suspended in the spherical shell and the spherical shell move relative to each other.

[0029] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: The present application is based on the principle of friction nanogenerators. By setting a fixed component, a power generation component, a connecting rod and a wire in a spherical shell, the fixed component can move relative to the spherical shell under the push of the water flow to drive the connecting rod to perform telescopic movement. The telescopic movement can cause the positive and negative strips of the power generation component to contact and separate, thereby generating current and outputting it along the wire. The self-powered device provided by the application has a simple structural design, low cost, easy replacement and maintenance, and high stability. The design of the self-powered device can collect multi-directional water wave energy and convert it into the contact and separation movement of the power generation part, and efficiently convert the water wave energy into electrical energy through high-efficiency friction nano power generation materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 It is a structural schematic diagram (half section) of a self-powered device for a sewage treatment system in an embodiment of the present application;

[0032] Figure 2 is a cross-sectional view of a self-powered device for a sewage treatment system in an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the structure inside the spherical shell of the self-powered device in the embodiment of the present application;

[0034] Figure 4 is a schematic structural diagram of a spherical shell of a self-powered device in an embodiment of the present application;

[0035] Figure 5 It is a schematic structural diagram of the positive electrode strip and the negative electrode strip of the power generation component of the self-powered device in the embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of an application scenario of a self-powered device for a sewage treatment system in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The triboelectric nanogenerator (TENG) is an innovative energy harvesting technology that generates electric charges through the contact and separation between materials and converts mechanical energy into electrical energy. TENG can effectively convert low-frequency, scattered water wave energy in the environment into electrical energy, and efficiently recycle water wave energy in the sewage treatment process. At present, TENG has been widely used in the fields of marine energy recovery and self-powered sensing. If TENG is applied to energy recovery in sewage plants, coupled with electrocatalytic tail water deep purification technology, and a self-powered catalytic system is constructed, it is expected to achieve resource recycling in sewage plants and the removal of typical new pollutants in tail water.

[0038] Based on the above considerations, the present application proposes a self-powered device for a sewage treatment system. In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] First refer to Figure 1 and2 , Figure 1 It is a structural schematic diagram (half section) of a self-powered device for a sewage treatment system in an embodiment of the present application; Figure 2 It is a cross-sectional view of a self-powered device for a sewage treatment system in an embodiment of the present application.

[0040] like Figure 1 and 2 As shown, the self-powered device provided in the present application is spherical as a whole, and mainly includes a spherical shell 1 and a fixing component 2, a power generation component 3, a connecting rod 4 and a wire (not shown in the figure) arranged inside the spherical shell 1.

[0041] Specifically, the spherical shell 1 includes an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 can form a sphere with an internal space by snapping or screwing. A through hole 111 is also provided at the top of the upper shell 11. The fixing component 2 is suspended inside the spherical shell 1 by a connecting rope 5. As an example, a hanging ring 20 can be provided at the top of the fixing component 2, one end of the connecting rope 5 is fixed to the hanging ring 20, and the other end is fixed to the inner surface of the upper shell 11, for example, one end of the connecting rope 5 is glued to the inner surface of the upper shell 11.

[0042] Both the power generation component 3 and the connecting rod 4 are provided in a plurality, and the power generation component 3 is fixed to the inner surface of the upper shell 11 and / or the lower shell 12 in an annular array. Correspondingly, the connecting rod 4 is also fixed to the fixing component 2 in an annular array, that is, the number of the connecting rods 4 is the same as the number of the power generation component 3. In this way, the first end of each connecting rod 3 is fixed to the fixing component 2, and the second end of each connecting rod 3 is fixed to the power generation component 3, and then the first end of the wire is connected to the power generation component 3 respectively, and the second end of the wire is passed through the through hole 111 set at the top of the upper shell 11. The wire is not shown in the figure. As an example, the wire can be multiple, and the first end of each wire is connected to the power generation component 3, and the second end passes through the through hole 111; the wire can also be one, and then the first end of the wire is divided into multiple contacts, each contact is connected to a power generation component 3, and the second end of the wire passes through the through hole 111. In this embodiment, the power generation component 3 includes a positive electrode strip 31 and a negative electrode strip 32, and the positive electrode strip 31 and the negative electrode strip 32 are alternately folded and arranged.

[0043] Through the above structural design, the fixing component 2, the power generation component 3 and the connecting rod 4 are arranged in the internal space of the spherical shell 1. Since the fixing component 2 is suspended inside the spherical shell 1, under the action of external force, such as the process of water waves impacting the spherical shell 1, the fixing component 2 can move relative to the spherical shell 1, thereby driving the connecting rods 4 fixed thereon to perform telescopic movement. Since the second ends of the connecting rods 3 are all connected to the power generation component 3, the telescopic movement of each connecting rod 4 can make the positive electrode strip 31 and the negative electrode strip 31 of the power generation component 3 continuously contact-separate movement. During the contact-separation process, the positive electrode strip 31 and the negative electrode strip 31 will generate current based on the principle of friction nano-power generation, and the generated current is further output through the wire. The current output through the wire is further rectified by the rectifier bridge to convert the alternating current into direct current and then transmitted to the energy storage device for subsequent electrocatalytic removal of pollutants.

[0044] In a specific embodiment, Figure 2 and Figure 3 As shown, the fixed component 2 includes an outer shell surrounded by an upper half shell 21 and a lower half shell 22, and the interior of the outer shell is used to place a sphere 23 of a set weight, and the connecting rod 4 can be distributed and fixed on the upper half shell 21 and / or the lower half shell 22 in a manner corresponding to the distribution of the power generation component 3. Specifically, the fixed component 2 is also a sphere with an internal space surrounded by two semicircles, and its internal space can be used to place spheres 23 of different weights. In this embodiment, the set weight of the sphere 23 is greater than the weight of the spherical shell 1. Those skilled in the art can select a sphere 23 of a suitable weight according to actual needs, and can replace spheres 23 of different weights during use. This embodiment does not specifically limit this. Generally speaking, the weight of the sphere 23 is greater than the weight of the spherical shell 1, which can make the fixed component 2 move better relative to the spherical shell 1 under the action of inertia. Further, the ring 20 can be set at the top of the upper half shell 21, so that the connecting rope 5 can hang the fixed component 2 inside the spherical shell 1 through the ring 20.

[0045] Further, taking the example that the power generation components 3 are distributed in an annular array and fixed on the inner surface of the lower shell 12, in this embodiment, the connecting rods 4 can be arranged in an annular array on the lower half shell 22. Figure 3 As shown, it is equivalent to distributing a plurality of mounting positions on the lower half shell 22, and these mounting positions can be evenly distributed on the outer surface of the lower half shell 22. Those skilled in the art can reasonably distribute these mounting positions according to actual needs, and a connecting rod 4 is fixed to each mounting position. If the inner surface of the upper shell 11 is also distributed and fixed with power generation components 3, a plurality of connecting rods 4 can be correspondingly distributed on the upper half shell 21, so that the second ends of these connecting rods 4 can be connected to the power generation components 3 distributed on the inner surface of the upper shell 11.

[0046] As an example, continue to refer to Figure 3 A fixing platform 41 is provided at the second end of each connecting rod 4, and the fixing platform 41 is used to be fixedly connected to the power generation component 3. In this example, the fixing platform 41 can be a circular platform, and those skilled in the art can also set other shapes such as a square platform according to actual needs.

[0047] Still taking the example of the power generation components 3 being distributed in an annular array and fixed on the inner surface of the lower housing 12, refer to Figure 4 , Figure 4 Schematic diagram of the structure of the spherical shell of the self-powered device in the embodiment of the present application. Figure 4 As shown, the inner surface of the lower shell 12 of the spherical shell 1 is provided with a plurality of raised platforms 121 distributed in a circular array, and the power generation component 3 is fixed on the raised platforms 121 so that the power generation component 121 can fit the inner surface of the lower shell 12. Specifically, in this embodiment, the raised platforms 121 are divided into three layers, the first and second layers are distributed in a circular array, and the third layer has one raised platform 121. The raised platforms 121 can also be evenly distributed on the inner surface of the lower shell 12, and the distribution mode thereof corresponds to the distribution mode of the connecting rod 4 on the fixed component 2. Regarding the setting of the raised platforms 121, since the lower shell 12 is a semicircular sphere, its inner surface has a certain curvature. After the raised platforms 121 are set, the position where the raised platforms 121 are located will become flat. In this way, the power generation component 3 is fixed to the raised platforms 121, which is equivalent to being completely fitted to the inner surface of the lower shell 12, and the power generation component 3 is more stable in the process of contact-separation movement with the telescopic movement of the connecting rod 4.

[0048] Correspondingly, if the inner surface of the upper shell 11 is also distributed and fixed with the power generation component 3, a plurality of raised platforms 121 distributed in a ring array can be provided on the inner surface of the upper shell 11 of the spherical shell 1. Figure 4 Only the raised platform 121 provided on the lower shell 12 is shown in the figure. Although the raised platform 121 provided on the inner surface of the upper shell 11 is not shown, the raised platform 121 can also be distributed on the inner surface of the upper shell 11. It should be noted that the distribution of the raised platform 121 on the inner surface of the upper shell 11 can be compared with its distribution on the lower shell 12. It should be noted that the raised platform 121 on the inner surface of the upper shell 11 does not block the through hole 111 of the upper shell 11. As an example, except that the raised platform 121 is not provided at the through hole 111 at the top of the upper shell 11, the raised platforms 121 on the rest of the upper shell 11 can be symmetrically arranged one by one with the raised platforms 121 distributed on the lower shell 12.

[0049] As an optional embodiment, the fixed component 2 itself can be a sphere with a set weight. In this case, the connecting rod 4 can be distributed and fixed on the sphere in a manner corresponding to the distribution of the power generation component 3. In this embodiment, the set weight is greater than the weight of the spherical shell 1. After selecting a sphere with a set weight, the sphere can be used as the fixed component 2, and the sphere does not need to be replaced during use. The lifting ring 20 can be directly set on the top of the sphere. In other words, the fixed component 2 in this embodiment does not need to be set with an upper half shell 21 and a lower half shell 22, and the sphere 23 can be directly used as the fixed component 2. In this way, the lifting ring 20 can be directly set on the top of the sphere 23, and the part connected to the connecting rod 3 can be distributed on the lower semicircular outer surface or the upper semicircular outer surface of the sphere 23. Optionally, the fixed component 2 can also choose other shapes, which are not specifically limited in this embodiment.

[0050] Refer to the following Figure 5 The structure of the power generation component 3 of this embodiment is described in further detail. Figure 5 It is a schematic diagram of the structure of the positive electrode strip and the negative electrode strip of the power generation component of the self-powered device in the embodiment of the present application.

[0051] Figure 5 The positive electrode strip 31 and the negative electrode strip 32 of the power generation component 3 are shown. The positive electrode strip 31 is made of two positive electrode materials covered on a double-sided conductive copper foil tape. In this embodiment, the positive electrode material can be a nylon film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm. The positive electrode strip 31 is obtained by pasting a nylon film with a thickness of 0.05 mm on two opposite sides of the double-sided conductive copper foil tape with a thickness of 0.06 mm. The length and width of the positive electrode strip 31 can be adjusted according to actual conditions. As an example, the width of the positive electrode strip 31 can be in the range of 20-50 mm, and the length can be in the range of 400-1000 mm.

[0052] The negative electrode strip 32 is made of two negative electrode materials covered on a double-sided conductive copper foil tape. In this embodiment, the negative electrode material can be a fluorinated ethylene propylene film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm. The negative electrode strip 32 is obtained by pasting the fluorinated ethylene propylene film with a thickness of 0.05 mm on the opposite sides of the double-sided conductive copper foil tape with a thickness of 0.06 mm. The length and width of the negative electrode strip 32 can be adjusted according to actual conditions. As an example, the width of the negative electrode strip 32 can be in the range of 20-50 mm, and the length can be in the range of 400-1000 mm.

[0053] In this embodiment, the selection of positive electrode material and negative electrode material can be flexibly selected by those skilled in the art according to actual needs, and this embodiment does not specifically limit the positive electrode material and negative electrode material. The length and width of the positive electrode strip 31 and the negative electrode strip 32 are selected to be compatible. In this way, in the process of alternately folding the positive electrode strip 31 and the negative electrode strip 32 to form the power generation component 3, the positive electrode strip 31 can be folded into the following shape: Figure 5 The multiple continuous "Z"-shaped structures shown in FIG. 1 are similarly folded into the negative electrode strip 32. Figure 5 The multiple continuous "Z" shaped structures shown. Figure 5 The positive electrode strip 31 and the negative electrode strip 32 are placed in the orientation shown, that is, the opening direction of the folded positive electrode strip 31 (such as the left and right sides of the "Z" shape are the opening direction) is the left-right direction, and the opening direction of the folded negative electrode strip 32 is the front-back direction. At this time, the positive electrode strip 31 can be kept still, and then the negative electrode strip 32 can be translated to the position of the positive electrode strip 31 until the negative electrode strip 32 is inserted into the positive electrode strip 31, so as to form Figure 1 and 2 As shown in the alternate folding structure. In this way, during the telescopic movement of the connecting rod 4, a pressure or tension is generated on the power generation component 3. When the power generation component 3 is pushed, the positive electrode strip 31 and the negative electrode strip 32 are in contact, and when the power generation component 3 is stretched, the positive electrode strip 31 and the negative electrode strip 32 are separated, and current can be generated through the contact-separation movement.

[0054] The self-powered device of the present application is applied to a sewage treatment system. Figure 6 , Figure 6 Schematic diagram of an application scenario of a self-powered device for a sewage treatment system in an embodiment of the present application. Figure 6 As shown, a hanging rope 61 (or a hanging rod) is provided above the aeration tank 6 of the sewage treatment system, and the self-powered device can be hung on the hanging rope 61 with the help of the rope. For example, a rope is sleeved on the spherical shell 1, and the rope is tied to the hanging rope 61, so that the spherical shell 1 of the self-powered device floats on the water surface of the aeration tank 6. In this way, the water in the aeration tank will exert a force (water wave force) on the spherical shell 1 during the flow, so that the self-powered device will shake within the range limited by the rope, and then the fixed component 2 in the spherical shell 1 will move relative to the spherical shell 1 under the action of inertia, thereby driving the connecting rod 4 to telescope, and the connecting rod 4 then causes the power generation component 3 to contact and separate to generate current. In this embodiment, as shown in FIG. Figure 6 As shown, a plurality of hanging ropes 61 may be set above the aeration tank 6, and a plurality of self-powered devices may be hung on each hanging rope 61, so as to more efficiently convert the mechanical energy of water waves into electrical energy.

[0055] In summary, the self-powered device provided by the present application has the following advantages: (1) High stability: The self-powered device is connected to the hanging rope or hanging rod above the aeration tank by a rope, and moves within a relatively fixed range, which is relatively more stable. The device can be relatively fixed according to the location of the aeration port of the aeration tank, so that the water wave energy can be collected more accurately; the fixing device inside the device is pulled by the connecting rope, and the relative movement is more stable, so that there will not be a large relative movement that will cause damage to the internal structure. (2) Simple structure: The spherical shell of the self-powered device is composed of an upper shell and a lower shell combined into a sphere by, for example, a slot, and the internal fixing parts, connecting rods and power generation parts are also fixed as a whole, with a simple structure and easy replacement and maintenance. (3) Low cost: The self-powered device can be made entirely by 3D printing, which is relatively low in cost. (4) High conversion efficiency: The design of the self-powered device can collect multi-directional water wave energy and convert it into the contact and separation movement of the power generation component, and efficiently convert the water wave energy into electrical energy through high-efficiency friction nano-power generation materials.

[0056] The above describes specific embodiments of this specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0057] The above is only an embodiment of this specification and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A self-powered device for a sewage treatment system, characterized in that: The device includes: A spherical shell, the spherical shell comprising an upper shell and a lower shell, and a through hole is provided on the top of the upper shell; A fixing component, the fixing component is suspended inside the spherical shell through a connecting rope; A power generation component, wherein the power generation components are multiple and distributed in an annular array and fixed on the inner surface of the upper shell and / or the lower shell; A connecting rod, wherein there are a plurality of connecting rods, a first end of each connecting rod is fixed to the fixing component, and a second end of each connecting rod is fixed to the power generation component; Conductive wires, wherein the first ends of the conductive wires are respectively connected to the power generation components, and the second ends of the conductive wires pass through the through holes provided on the top of the upper shell; Among them, the power generation component includes positive electrode strips and negative electrode strips, and the positive electrode strips and the negative electrode strips are alternately folded and arranged; under the action of external force, the fixed component can move relative to the spherical shell to drive the connecting rod to perform telescopic movement, and the telescopic movement can cause the positive electrode strips and the negative electrode strips of the power generation component to perform contact-separation movement, thereby generating current and outputting it along the wire.

2. The self-powered device according to claim 1, characterized in that: The fixing component is a sphere with a set weight, and the connecting rods are distributed and fixed on the sphere in a manner corresponding to the distribution manner of the power generation components; Wherein, a hanging ring is arranged on the top of the sphere, one end of the connecting rope is fixed on the hanging ring, and the other end of the connecting rope is fixed to the inner surface of the upper shell.

3. The self-powered device according to claim 1, characterized in that: The fixing component comprises an outer shell surrounded by an upper half shell and a lower half shell, the interior of the outer shell is used to place a ball with a set weight, and the connecting rods are distributed and fixed on the upper half shell and / or the lower half shell in a manner corresponding to the distribution manner of the power generation components; Wherein, a lifting ring is arranged on the top of the upper half shell, one end of the connecting rope is fixed on the lifting ring, and the other end of the connecting rope is fixed to the inner surface of the upper shell body.

4. The self-powered device according to claim 1, characterized in that: The inner surface of the upper shell and / or the lower shell is provided with a plurality of raised platforms distributed in a ring array. The power generation component is fixed on the raised platform so that the power generation component can be attached to the inner surface of the lower shell.

5. The self-powered device according to claim 1, characterized in that: A fixing platform is provided at the second end of each connecting rod, and the fixing platform is used for fixing connection with the power generation component.

6. The self-powered device according to any one of claims 1 to 5, characterized in that: The positive electrode strip is made of two positive electrode materials covered on a double-sided conductive copper foil tape.

7. The self-powered device according to claim 6, characterized in that: The positive electrode material is a nylon film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm; The nylon film with a thickness of 0.05 mm is pasted on two opposite sides of a double-sided conductive copper foil tape with a thickness of 0.06 mm.

8. The self-powered device according to claim 6, characterized in that: The negative electrode strip is made of two negative electrode materials covered on a double-sided conductive copper foil tape.

9. The self-powered device according to claim 8, characterized in that: The negative electrode material is a fluorinated ethylene propylene film with a thickness of 0.05 mm, and the thickness of the double-sided conductive copper foil tape is 0.06 mm; The fluorinated ethylene propylene film with a thickness of 0.05 mm is pasted on two opposite sides of a double-sided conductive copper foil tape with a thickness of 0.06 mm.

10. The self-powered device according to any one of claims 1 to 5, characterized in that: A hanging rod or hanging rope is provided above the aeration tank of the sewage treatment system, and the self-powered device can be hung on the hanging rod or the hanging rope by means of a rope, so that the spherical shell of the self-powered device floats on the water surface of the aeration tank; Under the action of water wave force in the aeration tank, the self-powered device can swing within the range limited by the rope, so that the fixed component suspended in the spherical shell and the spherical shell move relative to each other.

Images