Microampere-level current induction electricity taking device

Abstract

The invention discloses a microampere-level current induction electricity taking device, and belongs to the technical field of current induction electricity taking. An upper shell and a lower shell are closed, two ejector blocks on the same side extrude each other, a sliding rod can be extruded in the stress process of the two ejector blocks, and a piston plate can guide gas in an air cylinder into an air bag seat through a gas guide pipe; the air bag seats expand and drive the sealing rings to make contact with the outer wall of the cable, concave-convex grains between the two air bag seats on the same side are embedded with each other, then the connection sealing performance between the two air bag seats is improved, the air bag seats and the sealing rings can conduct self-adaptive shape adjustment according to the shape of the outer layer of the cable in the cable extrusion process, and the sealing performance of the cable is improved. The sealing ring can be in full contact with the outer wall of the cable, a gap between the through hole and the outer wall of the cable is prevented, meanwhile, the assembly stability between the device and the cable is improved, the interiors of the lower shell and the upper shell are in a relatively sealed state, water seepage and dust entering in the device are prevented, and normal use of the device is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of current induction power extraction, and specifically relates to a microampere-level current induction power extraction device. Background Art

[0002] Microampere-level current induction power extraction is a technology for obtaining energy or performing measurements from tiny currents. Based on the law of electromagnetic induction, when a conductor moves in a magnetic field to cut magnetic induction lines or the magnetic field changes, an induced electromotive force will be generated in the conductor, thereby realizing energy conversion and current induction power extraction. It is widely used for troubleshooting ground faults and short-circuit faults in high-voltage power grid transmission lines, and for measuring the operating conditions of currents on lines to determine whether a fault has occurred.

[0003] Currently, the method of open-and-close type current induction power extraction is usually adopted to monitor the line. The housing of the open-and-close type induction power extraction mechanism mainly plays the role of waterproofing and dustproofing. Due to the influence of factors such as thermal expansion and contraction, the housing is prone to deformation and loose closure. Moreover, the line is inevitably deformed during use, and the outer layer is not always a standard circular structure, which makes it easy to generate gaps between the power extraction mechanism and the line and unstable assembly, resulting in water seepage and dust ingress inside the power extraction mechanism, affecting the normal use of the power extraction mechanism. Summary of the Invention

[0004] In order to overcome the above defects, the present invention provides a microampere-level current induction power extraction device, which solves the problems that the housing of the open-and-close type induction power extraction mechanism mainly plays the role of waterproofing and dustproofing, and due to the influence of factors such as thermal expansion and contraction, the housing is prone to deformation and loose closure, and the line is inevitably deformed during use, and the outer layer is not always a standard circular structure, which makes it easy to generate gaps between the power extraction mechanism and the line and unstable assembly, resulting in water seepage and dust ingress inside the power extraction mechanism.

[0005] To achieve the above object, the present invention provides the following technical solution: a microampere-level current induction power-taking device, which includes a lower housing and an upper housing. A lower iron core assembly and an upper iron core assembly are respectively installed inside the lower housing and the upper housing. Two hinges are installed on the back of the lower housing. The lower housing is hinged to the upper housing through the two hinges, and the opposite surfaces of the lower housing and the upper housing are overlapped. One side of the lower iron core assembly is connected with a conduction wire, and the upper iron core assembly is connected to the lower iron core assembly through the conduction wire. Through holes are respectively opened on both sides of the lower housing and the upper housing, and the through holes are communicated with the interiors of the lower iron core assembly and the upper iron core assembly. Expansion seal assemblies are respectively installed in the two through holes on the same side, and the two expansion seal assemblies are respectively arranged inside the lower housing and the upper housing. The outer side of the expansion seal assembly is connected with an extrusion assembly. The two extrusion assemblies on the same side are respectively installed inside the lower housing and the upper housing and their ends are overlapped with each other. A card seat is fixedly connected to the front of the lower housing. A card plate is arranged inside the card seat, and the card plate is fixedly connected to the front of the upper housing. A locking assembly is installed through the card seat, and the locking assembly is overlapped on the card plate. The bottom of the card plate is overlapped with a support assembly, and the support assembly is installed at the bottom of the inner wall of the card seat.

[0006] As a further solution of the present invention: a sealing strip is provided at the edge of the top of the lower housing, and a sealing groove is provided at the edge of the bottom of the upper housing. The sealing strip is embedded in the sealing groove. The through holes on both sides of the lower housing and the upper housing are designed in an arc shape, and the two through holes on the same side form a circular cavity.

[0007] As a further solution of the present invention: handles are respectively fixedly connected to the fronts of the lower housing and the upper housing. The handles are designed in a U shape, and anti-slip pads are provided on the exteriors of the lower housing and the upper housing.

[0008] As a further solution of the present invention: the expansion seal assembly includes a shield. The shield is fixedly connected in the through hole. The shield is designed in an arc shape and an airbag seat is fixed inside. A plurality of sealing rings are provided on the inner wall of the airbag seat. The outside of the airbag seat is communicated with the end of the extrusion assembly. Concave-convex patterns are provided on the horizontal plane of the airbag seat.

[0009] As a further solution of the present invention: the extrusion assembly includes an air cylinder. The air cylinder is fixed inside the lower housing or the upper housing. One end of the air cylinder is communicated with a guide air pipe. The other end of the guide air pipe penetrates through the shield and is communicated with the airbag seat. A piston plate is arranged inside the air cylinder. First springs and sliding rods are respectively fixedly connected to both sides of the piston plate. The other ends of the first springs are fixed inside the air cylinder. The end of the sliding rod penetrates through the air cylinder and is fixedly connected with a top block. The two top blocks on the same side are overlapped with each other and their shapes are respectively a plane and a spherical surface.

[0010] As a further solution of the present invention: The locking assembly includes a stop bar, which is designed in an L shape, penetrates and slides on the card seat, and the top of the inner wall of the stop bar abuts against the clamping plate.

[0011] As a further solution of the present invention: The bottom of the clamping plate is designed to be roughly hook-shaped. One side of the stop bar away from the card seat is fixedly connected with a handle, and one side of the inner wall of the stop bar is fixedly connected with two second springs, and the other ends of the second springs are fixedly connected to the front of the card seat.

[0012] As a further solution of the present invention: The support assembly includes a sliding plate, which is slidably connected inside the card seat. The two sides of the bottom of the sliding plate are respectively fixedly connected with third springs, and the bottom ends of the two third springs are fixed to the bottom of the inner wall of the card seat.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In the present invention, by closing the upper shell and the lower shell, the sealing strip on the lower shell can be embedded into the sealing groove in the upper shell, thereby playing a role in sealing between the upper shell and the lower shell. The two top blocks on the same side are pressed against each other. Since the shapes of the two top blocks are a plane and a spherical surface respectively, the top block with a spherical end can slide on the top block with a plane end. During the process of the two top blocks being stressed, the sliding rod can be pressed, and the sliding rod drives the piston plate to slide inside the air cylinder, and the gas inside the air cylinder can be introduced into the airbag seat through the air duct, causing the airbag seat to expand and driving the multiple sealing rings on the inner wall to contact the outer wall of the cable. Moreover, the concave-convex patterns between the two airbag seats on the same side are mutually engaged, thereby improving the connection sealing performance between the two airbag seats. The airbag seat and the sealing ring can adaptively adjust their shapes according to the shape of the outer layer of the cable during the process of pressing the cable, enabling the sealing ring to fully contact the outer wall of the cable, preventing gaps from appearing between the perforation and the outer wall of the cable, and at the same time improving the assembly stability between the device and the cable, making the inside of the lower shell and the upper shell in a relatively sealed state, preventing water seepage and dust ingress inside the device, and ensuring the normal use of the device.

[0015] 2. In the present invention, the baffle is squeezed by the card plate on the front side of the upper shell. Since the bottom of the card plate is roughly hook-shaped and the side of the baffle close to the card plate is inclined, the baffle can slide during the compression of the baffle. As the card plate continues to be pressed down, it can contact the slide plate. The slide plate can squeeze the two third springs below after being compressed. When the card plate passes through the baffle, the tension of the second spring drives the baffle to approach the card plate until the baffle is connected to the hook structure at the bottom of the card plate, thereby achieving the purpose of locking the card plate. At this time, the upper shell and the lower shell are completely closed. It is not easy for the upper shell and the lower shell to be separated under the action of external force. When unfolding the upper shell and the lower shell, the handle is pulled forward to make the handle drive the baffle to move forward so that the baffle can be separated from the bottom of the card board, thereby releasing the locked state of the card board. At the same time, the slide plate is supported by the elastic force of multiple third springs, so that the slide plate can move up and lift the card board, so as to facilitate holding the upper handle to open the upper shell. At this time, the lower shell and the upper shell are in an open state, which facilitates the opening and closing of the upper shell and the lower shell, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the connection between the extrusion assembly and the expansion sealing assembly of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the expansion seal assembly of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the extrusion assembly of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the cross section of the card holder of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the locking assembly of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the support assembly of the present invention;

[0024] In the figure: 1. Lower housing; 2. Upper housing; 3. Perforation; 4. Lower iron core assembly; 5. Upper iron core assembly; 6. Conductive wire; 7. Hinge; 8. Sealing strip; 9. Sealing groove; 10. Expansion sealing assembly; 101. Baffle; 102. Airbag seat; 103. Sealing ring; 104. Concave-convex pattern; 11. Extrusion assembly; 111. Air cylinder; 112. Air duct; 113. Piston plate; 114. First spring; 115. Slide bar; 116. Top block; 12. Clamping seat; 13. Clamping plate; 14. Locking assembly; 141. Stop bar; 142. Handle; 143. Second spring; 15. Support assembly; 151. Slide plate; 152. Third spring; 16. Handle. Specific embodiments

[0025] The technical solution of the present application will be further described in detail below in conjunction with specific embodiments.

[0026] As Figure 1-8 shown, the present invention provides a technical solution: a microampere-level current induction power-taking device, including a lower housing 1 and an upper housing 2. A lower iron core assembly 4 and an upper iron core assembly 5 are respectively installed inside the lower housing 1 and the upper housing 2. Two hinges 7 are installed on the back of the lower housing 1. The lower housing 1 is hinged to the upper housing 2 through the two hinges 7, and the opposite surfaces of the lower housing 1 and the upper housing 2 are lapped. Handles 16 are respectively fixedly connected to the fronts of the lower housing 1 and the upper housing 2. The handle 16 is designed in a U shape, and anti-slip pads are provided outside the lower housing 1 and the upper housing 2. The power-taking device can be easily carried through the handle 16, and the setting of the anti-slip pads can improve the stability of the placement of the device and prevent the device from moving arbitrarily and affecting the stability of the power-taking work;

[0027] One side of the lower iron core assembly 4 is connected with a conductive wire 6. The upper iron core assembly 5 is connected to the lower iron core assembly 4 through the conductive wire 6. Perforations 3 are respectively opened on both sides of the lower housing 1 and the upper housing 2. The perforations 3 are communicated with the interiors of the lower iron core assembly 4 and the upper iron core assembly 5. A sealing strip 8 is provided at the edge of the top of the lower housing 1, and a sealing groove 9 is provided at the edge of the bottom of the upper housing 2. The sealing strip 8 is embedded in the sealing groove 9. The perforations 3 on both sides of the lower housing 1 and the upper housing 2 are designed in an arc shape, and the two perforations 3 on the same side form a circular cavity. When the upper housing 2 and the lower housing 1 are gradually closed, the sealing strip 8 on the lower housing 1 can be embedded in the sealing groove 9 in the upper housing 2, thereby playing a role in sealing between the upper housing 2 and the lower housing 1;

[0028] Two expansion seal assemblies 10 are respectively installed in two perforations 3 on the same side, and the two expansion seal assemblies 10 are respectively arranged in the lower housing 1 and the upper housing 2. The expansion seal assembly 10 includes a shield 101, which is fixedly connected in the perforation 3. The shield 101 is designed in an arc shape and an airbag seat 102 is fixedly installed inside. A number of sealing rings 103 are arranged on the inner wall of the airbag seat 102. The outside of the airbag seat 102 is communicated with the end of the extrusion assembly 11. Concave and convex patterns 104 are arranged on the horizontal plane of the airbag seat 102. Due to the mutual engagement of the concave and convex patterns 104 between the two airbag seats 102 on the same side, the connection tightness between the two airbag seats 102 is improved;

[0029] The outside of the expansion seal assembly 10 is connected with an extrusion assembly 11. The two extrusion assemblies 11 on the same side are respectively installed inside the lower housing 1 and the upper housing 2 and their ends overlap each other. The extrusion assembly 11 includes an air cylinder 111, which is fixed inside the lower housing 1 or the upper housing 2. One end of the air cylinder 111 is communicated with a guide air pipe 112, and the other end of the guide air pipe 112 penetrates through the shield 101 and is communicated with the airbag seat 102. A piston plate 113 is arranged inside the air cylinder 111. On both sides of the piston plate 113, a first spring 114 and a sliding rod 115 are respectively fixedly connected. The other end of the first spring 114 is fixed inside the air cylinder 111. The end of the sliding rod 115 penetrates through the air cylinder 111 and is fixedly connected with a top block 116. The two top blocks 116 on the same side overlap each other and their shapes are respectively a plane and a spherical surface;

[0030] Since the shapes of the two top blocks 116 are respectively a plane and a spherical surface, the top block 116 with a spherical end can slide on the top block 116 with a plane end. During the process of the two top blocks 116 being stressed, the sliding rod 115 can be extruded, and the sliding rod 115 drives the piston plate 113 to slide inside the air cylinder 111, so that the gas inside the air cylinder 111 can be introduced into the airbag seat 102 through the guide air pipe 112, causing the airbag seat 102 to expand and driving a plurality of sealing rings 103 on the inner wall to contact the outer wall of the cable. During the process of the airbag seat 102 and the sealing rings 103 squeezing the cable, they can adaptively adjust their shapes according to the shape of the outer layer of the cable;

[0031] The upper housing 2 is turned up through the upper handle 16, so that the two top blocks 116 on the same side move away from each other, and the top blocks 116 are no longer stressed. At this time, the piston plate 113 is extruded by the elastic force of the first spring 114, so that the piston plate 113 drives the sliding plate 151 to extend out of the air cylinder 111, and the air cylinder 111 pumps air into the airbag seat 102 through the guide air pipe 112, causing the airbag seat 102 to return to its original state, so as to facilitate the next sealing connection of the cable.

[0032] The front of the lower shell 1 is fixedly connected with a card seat 12, and a card plate 13 is arranged in the card seat 12. The card plate 13 is fixedly connected to the front of the upper shell 2. A locking assembly 14 is installed through the card seat 12, and the locking assembly 14 is overlapped on the card plate 13. The locking assembly 14 includes a baffle 141. The baffle 141 is L-shaped. The baffle 141 slides through the card seat 12. The top of the inner wall of the baffle 141 overlaps the card plate 13. The bottom of the card plate 13 is roughly hook-shaped. The baffle 141 is fixedly connected to a handle 142 on the side away from the card seat 12, and the baffle Two second springs 143 are fixedly connected to one side of the inner wall of 141, and the other end of the second spring 143 is fixedly connected to the front side of the card seat 12. Because the bottom of the card plate 13 is roughly hook-shaped, and the side of the baffle 141 close to the card plate 13 is inclined, the baffle 141 can slide when it is compressed. When the card plate 13 passes through the baffle 141, the tension of the second spring 143 drives the baffle 141 to approach the card plate 13 until the baffle 141 is connected to the hook-shaped structure at the bottom of the card plate 13, thereby achieving the purpose of locking the card plate 13.

[0033] A support assembly 15 is overlapped at the bottom of the card plate 13 , and the support assembly 15 is installed at the bottom of the inner wall of the card seat 12 .

[0034] The supporting assembly 15 includes a slide plate 151, which is slidably connected to the inside of the card seat 12. Third springs 152 are fixedly connected to both sides of the bottom of the slide plate 151. The bottom ends of the two third springs 152 are fixed to the bottom of the inner wall of the card seat 12. The baffle 141 is driven forward by the handle 142 so that the baffle 141 can be separated from the bottom of the card plate 13, thereby releasing the locking state of the card plate 13. At the same time, the slide plate 151 is supported by the elastic force of multiple third springs 152, so that the slide plate 151 can move up and lift up the card plate 13, so as to facilitate holding the upper handle 16 to open the upper shell 2.

[0035] The working principle of the present invention is:

[0036] During the process of taking power by induction of microampere current, the handle 142 is pulled forward, so that the handle 142 drives the blocking bar 141 to move forward, so that the blocking bar 141 can be separated from the bottom of the card plate 13, thereby releasing the locking state of the card plate 13. At the same time, the slide plate 151 is supported by the elastic force of multiple third springs 152, so that the slide plate 151 can move up and lift the card plate 13, so as to facilitate holding the upper handle 16 to open the upper shell 2. At this time, the lower shell 1 and the upper shell 2 are in the open state, and the lower shell 1 and the upper shell 2 are moved to the cable, so that the cable is overlapped in the lower core assembly 4 in the lower shell 1, and at the same time, the expansion sealing assemblies 10 on both sides of the lower shell 1 can contact the outer wall of the cable;

[0037] Secondly, hold the upper handle 16 and pull the upper housing 2 so that the upper housing 2 can rotate on the lower housing 1 through the hinge 7. During this process, the upper housing 2 and the lower housing 1 gradually close, and the sealing strip 8 on the lower housing 1 can be embedded in the sealing groove 9 in the upper housing 2, thereby playing a role in sealing between the upper housing 2 and the lower housing 1. The two top blocks 116 on the same side are mutually extruded. Since the shapes of the two top blocks 116 are a plane and a spherical surface respectively, the top block 116 with a spherical end can slide on the top block 116 with a plane end. During the process of the two top blocks 116 being stressed, they can extrude the slide rod 115, and the slide rod 115 drives the piston plate 113 to slide inside the air cylinder 111, and the gas inside the air cylinder 111 can be introduced into the airbag seat 102 through the air duct 112, causing the airbag seat 102 to expand and driving the multiple sealing rings 103 on the inner wall to contact the outer wall of the cable. Moreover, the concave-convex patterns 104 between the two airbag seats 102 on the same side are mutually engaged, thereby improving the connection tightness between the two airbag seats 102. The airbag seat 102 and the sealing ring 103 can adaptively adjust their shapes according to the shape of the outer layer of the cable during the process of squeezing the cable, so that the sealing ring 103 can fully contact the outer wall of the cable, prevent gaps from appearing between the perforation 3 and the outer wall of the cable, and make the inside of the lower housing 1 and the upper housing 2 in a relatively sealed state;

[0038] When the upper housing 2 and the lower housing 1 are closed, the clamping plate 13 on the front surface of the upper housing 2 can enter the clamping seat 12 and squeeze the stop strip 141. Since the bottom of the clamping plate 13 is designed to be roughly hook-shaped, and the side of the stop strip 141 close to the clamping plate 13 is designed with an inclined surface, the stop strip 141 can slide during the process of being pressed. As the clamping plate 13 continues to be pressed down, it can contact the sliding plate 151. After the sliding plate 151 is pressed, it can squeeze the two third springs 152 below. When the clamping plate 13 passes through the stop strip 141, the stop strip 141 is driven to approach the clamping plate 13 by the pulling force of the second spring 143 until the stop strip 141 is clamped on the hook-shaped structure at the bottom of the clamping plate 13, thereby achieving the purpose of locking the clamping plate 13. At this time, the upper housing 2 and the lower housing 1 are completely closed and are not likely to be separated under the action of external force;

[0039] After completing the assembly of the power-taking device and the cable, the cable is energized. The lower iron core assembly 4 and the upper iron core assembly 5 are located on the outer wall of the cable. Based on the law of electromagnetic induction, when the cable, as a conductor, moves in the magnetic fields generated by the lower iron core assembly 4 and the upper iron core assembly 5 or the magnetic fields change, an induced electromotive force will be generated in the cable, thereby realizing the conversion of energy and the inductive power-taking of current. When disassembling the power-taking device from the outside of the cable, pull the handle 142, so that the handle 142 drives the stop bar 141 to move forward, enabling the stop bar 141 to disengage from the bottom of the clamping plate 13. Flip up the upper housing 2 through the upper handle 16, so that the two top blocks 116 on the same side move away from each other, and the top blocks 116 are no longer stressed. At this time, the piston plate 113 is squeezed by the elastic force of the first spring 114, so that the piston plate 113 drives the sliding plate 151 to extend out of the air cylinder 111, and the air cylinder 111 sucks air into the airbag seat 102 through the air guide pipe 112, so that the airbag seat 102 returns to its original state, facilitating the next sealing connection to the cable.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "plurality" is two or more unless otherwise specifically defined.

[0042] In the present invention, unless otherwise clearly specified and defined, the terms "install", "connect", "connection", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one solution", "some solutions", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the solution or example are included in at least one solution or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more solutions or examples.

Claims

1. Microampere-level current induction power-taking device, comprising a lower housing (1) and an upper housing (2), characterized in that: The lower housing (1) and the upper housing (2) are respectively internally provided with a lower iron core assembly (4) and an upper iron core assembly (5). Two hinges (7) are installed on the back of the lower housing (1). The lower housing (1) is hinged to the upper housing (2) through the two hinges (7), and the opposite surfaces of the lower housing (1) and the upper housing (2) are overlapped. One side of the lower iron core assembly (4) is connected with a conduction wire (6). The upper iron core assembly (5) is connected to the lower iron core assembly (4) through the conduction wire (6). Through holes (3) are respectively formed on both sides of the lower housing (1) and the upper housing (2). The through holes (3) are communicated with the interiors of the lower iron core assembly (4) and the upper iron core assembly (5). Expansion seal assemblies (10) are respectively installed in the two through holes (3) on the same side, and the two expansion seal assemblies (10) are respectively arranged in the lower housing (1) and the upper housing (2). The outer side of the expansion seal assembly (10) is connected with an extrusion assembly (11). The two extrusion assemblies (11) on the same side are respectively installed inside the lower housing (1) and the upper housing (2) and their ends are overlapped with each other. The front surface of the lower housing (1) is fixedly connected with a clamping seat (12). A clamping plate (13) is arranged inside the clamping seat (12). The clamping plate (13) is fixedly connected to the front surface of the upper housing (2). A locking assembly (14) is installed through the clamping seat (12). The locking assembly (14) is overlapped on the clamping plate (13). The bottom of the clamping plate (13) is overlapped with a support assembly (15). The support assembly (15) is installed at the bottom of the inner wall of the clamping seat (12).

2. The microampere-level current induction power-taking device according to claim 1, wherein: A sealing strip (8) is provided at the edge of the top of the lower housing (1), and a sealing groove (9) is provided at the edge of the bottom of the upper housing (2). The sealing strip (8) is embedded in the sealing groove (9). The through holes (3) on both sides of the lower housing (1) and the upper housing (2) are designed in an arc shape, and the two through holes (3) on the same side form a circular cavity.

3. The microampere-level current induction power-taking device according to claim 1, wherein: Handles (16) are respectively fixedly connected to the front surfaces of the lower housing (1) and the upper housing (2). The handles (16) are designed in a U shape, and anti-slip pads are provided on the exteriors of the lower housing (1) and the upper housing (2).

4. The microampere-level current induction power-taking device according to claim 1, wherein: The expansion seal assembly (10) includes a shield (101). The shield (101) is fixedly connected in the through hole (3). The shield (101) is designed in an arc shape and an airbag seat (102) is fixedly arranged inside. A plurality of sealing rings (103) are arranged on the inner wall of the airbag seat (102). The outside of the airbag seat (102) is communicated with the end of the extrusion assembly (11). Concavo-convex patterns (104) are arranged on the horizontal plane of the airbag seat (102).

5. The microampere-level current induction power-taking device according to claim 4, wherein: The extrusion assembly (11) includes a cylinder (111). The cylinder (111) is fixed inside the lower housing (1) or the upper housing (2). One end of the cylinder (111) is communicated with an air duct (112). The other end of the air duct (112) penetrates through the baffle (101) and is communicated with the airbag seat (102). A piston plate (113) is arranged inside the cylinder (111). A first spring (114) and a slide bar (115) are respectively and fixedly connected to both sides of the piston plate (113). The other end of the first spring (114) is fixed inside the cylinder (111). The end of the slide bar (115) penetrates through the cylinder (111) and is fixedly connected with a top block (116). The two top blocks (116) on the same side are mutually overlapped and their shapes are respectively a plane and a spherical surface.

6. The microampere-level current induction power-taking device according to claim 1, wherein: The locking assembly (14) includes a stop bar (141). The stop bar (141) is designed in an L shape. The stop bar (141) penetrates and slides on the card seat (12). The top of the inner wall of the stop bar (141) overlaps with the clamping plate (13).

7. The microampere-level current induction power-taking device according to claim 6, characterized in that: The bottom of the clamping plate (13) is designed to be roughly hook-shaped. A handle (142) is fixedly connected to the side of the stop bar (141) away from the card seat (12). And two second springs (143) are fixedly connected to one side of the inner wall of the stop bar (141). The other ends of the second springs (143) are fixedly connected to the front of the card seat (12).

8. The microampere-level current induction power-taking device according to claim 1, wherein: The support assembly (15) includes a sliding plate (151). The sliding plate (151) is slidably connected inside the card seat (12). Third springs (152) are respectively and fixedly connected to both sides of the bottom of the sliding plate (151). The bottom ends of the two third springs (152) are both fixed to the bottom of the inner wall of the card seat (12).

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