CT (Current Transformer) electricity taking equipment for automatically leveling, pressing and sealing mutual inductor

Abstract

The utility model discloses a mutual inductor automatic leveling, pressing and sealing CT electricity taking device, which comprises a shell, a magnet, a coil and a sealing gasket, the shell comprises an upper shell and a lower shell, the upper shell is rotatably arranged on the lower shell, the lower shell is provided with a driving piece for driving the upper shell to rotate towards the direction close to the lower shell, and the magnet is arranged on the lower shell. The magnets comprise a first magnet and a second magnet, the first magnet is movably arranged in the upper shell, a guide rail is arranged in the upper shell, the first magnet is movably arranged in the guide rail along an arc-shaped motion trail, and the second magnet is fixedly arranged in the lower shell; an elastic piece used for driving the first magnet to be close to the second magnet is arranged in the upper shell, and the sealing gasket is arranged at the end of the upper shell. The device has the advantages that the contact end faces of the first magnet and the second magnet are automatically leveled, and the sealing performance is good.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power-taking CT, in particular to a CT power-taking device with automatic leveling, pressing and sealing of a mutual inductor. Background Art

[0002] CT stands for Current Transformer, which is a transformer used to measure current and is usually used in high-voltage power grids. CT is usually composed of an iron core, a primary winding, and a secondary winding. The iron core is usually made of a material with high magnetic permeability to reduce hysteresis and iron loss. When current passes through the primary winding, it generates a magnetic field and transmits this magnetic field to the iron core. Since the secondary winding is independent of the primary winding, a corresponding voltage will be generated in the secondary winding. When the CT power supply equipment is installed on the high-voltage line, when the current of the high-voltage line passes through the primary winding, a corresponding voltage signal will be generated in the secondary winding. This voltage signal can be read and processed by an amplifier or other equipment.

[0003] In the prior art, the CT power supply device generally sets the annular magnet into two semicircular annular structures, and fixes them in the shell respectively. The shell is connected by screws to achieve the closure of the annular magnet. However, during the installation process, there is often a problem of misalignment of the contact between the end faces of the two semicircular annular magnets and poor sealing performance.

[0004] In view of this, the purpose of the utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a CT power taking device with automatic leveling, pressing and sealing of a mutual inductor, which solves the problem that the end sections of the upper magnet and the lower magnet are not parallel, resulting in poor contact, decreased magnetic permeability and poor sealing performance.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A CT power supply device for automatic leveling, pressing and sealing of a mutual inductor comprises a shell, a magnet, a coil and a sealing gasket, wherein the shell comprises an upper shell and a lower shell, wherein the upper shell is rotatably arranged on the lower shell, and a driving member for driving the upper shell to rotate toward the lower shell is arranged on the lower shell, wherein the magnet comprises a first magnet and a second magnet, wherein the first magnet is movably arranged in the upper shell, and a guide track is arranged in the upper shell, wherein the first magnet can be movably arranged in the guide track along an arc-shaped motion trajectory, wherein the second magnet is fixedly arranged in the lower shell, and an elastic member for driving the first magnet to be close to the second magnet is arranged in the upper shell, and wherein the sealing gasket is arranged at the end of the upper shell.

[0008] In the above structure, the first magnet is a semicircular ring structure, the second magnet is a semicircular ring structure, and the two end faces of the first magnet can pass through the upper shell. The first magnet and the second magnet are surrounded by a circular ring structure, and the motion trajectory is cocentric with the first magnet.

[0009] In the above structure, the elastic member is a spring sheet, one side of which is clamped on the inner wall of the upper shell away from the lower shell, and the other side is abutted against the side of the first magnet facing away from the second magnet, and the spring sheet abuts against the side of the first magnet in an arc shape.

[0010] In the above structure, the driving member is a torsion spring, and a mounting shaft is provided on the lower shell. The torsion spring is installed on the mounting shaft, and one side torsion arm of the torsion spring abuts against the lower shell, and the other side torsion arm abuts against the upper shell. When the torsion spring elasticity is released, it drives the upper shell and the lower shell to close.

[0011] In the above structure, an upper positioning step is provided on the end surface of the upper shell facing the lower shell, and a lower positioning step matching the upper positioning step is provided on the lower shell, and the upper positioning step is buckled with the lower positioning step.

[0012] In the above structure, there are two sealing gaskets, which are respectively fixedly disposed at two ends of the upper shell, and the sealing gaskets are located in the upper positioning step.

[0013] In the above structure, the sealing gasket is provided with a cantilever structure, and the cross section of the sealing gasket is a "7"-shaped structure.

[0014] In the above structure, the upper shell includes side panels that are detachably arranged on opposite sides, the guide rails are fixedly arranged on the side panels, the first magnet is fixedly provided with limiting blocks on opposite sides of the side panels, and the side panels are provided with limiting portions that cooperate with the limiting blocks, and when the first magnet slides to the end point of the active path, the limiting block abuts against the limiting portion.

[0015] The above structure further comprises an elastic wire clamp for pressing the high voltage cable, wherein the elastic wire clamp is rotatably disposed on the lower housing and is located between the upper housing and the lower housing.

[0016] The beneficial effect of the utility model is that by movably arranging the first magnet in the upper shell, when the upper shell and the lower shell are closed, the first magnet can be automatically adjusted according to the position and angle of the second magnet, thereby realizing automatic leveling of the contact end faces of the first magnet and the second magnet, effectively reducing the possibility of misalignment between the first magnet and the second magnet when closing, and arranging a sealing gasket to effectively improve the sealing performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure splitting of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the sealing gasket of the utility model.

[0022] Figure numerals: 1. upper shell; 11. side panel; 111. guide rail; 112. limit portion; 1121. limit groove; 12. upper positioning step; 2. lower shell; 21. mounting shaft; 22. lower positioning step; 3. first magnet; 31. limit block; 4. second magnet; 5. sealing gasket; 6. spring; 7. torsion spring; 8. coil; 9. elastic wire clamp; 10. cable. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-4 The utility model is further described.

[0024] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0025] Reference Figures 1 to 3A CT power-taking device with automatic leveling and compacting of mutual inductors is provided in overhead transmission lines to take power from overhead transmission lines for electrical equipment such as lighting equipment, monitoring equipment, and bird-repelling equipment. It includes a housing, a magnet, and a coil 8. The magnet is provided in the housing, and the coil 8 is wound around the magnet. The housing includes an upper housing 1 and a lower housing 2. The upper housing 1 and the lower housing 2 form a hollow ring structure, and the upper housing 1 is rotatably provided on the lower housing 2. Specifically, a mounting shaft 21 is fixedly provided on the lower housing 2, and the upper housing 1 is rotatably provided on the mounting shaft 21. The lower shell 2 is provided with a driving member for driving the upper shell 1 to rotate toward the lower shell 2. The driving member drives the upper shell 1 to flip so as to close the upper shell 1 and the lower shell 2. In this embodiment, the driving member is a torsion spring 7, which is sleeved on the mounting shaft 21 and has one torsion arm of the torsion spring 7 abutting against the lower shell 2, and the other torsion arm abutting against the upper shell 1. When the upper shell 1 and the lower shell 2 are in an open state, the elasticity of the torsion spring 7 contracts. When the torsion spring 7 is elastically released, the lower shell 2 is driven to flip toward the lower shell 2, so that the upper shell 1 and the lower shell 2 are in a closed state. When the specific installation is set, the center of the rotation trajectory of the upper shell 1 and the axis of the mounting shaft 21 are located on the same straight line. Such a setting is conducive to ensuring that when the upper shell 1 rotates on the mounting shaft 21 to engage with the lower shell 2, the upper shell 1 and the lower shell 2 can be accurately engaged without relative offset, which is conducive to reducing the possibility of a gap between the upper shell 1 and the lower shell 2.

[0026] The magnet includes a first magnet 3 and a second magnet 4. The first magnet 3 is movably arranged in the upper shell 1, and the second magnet 4 is fixedly arranged in the lower shell 2. A guide track 111 for guiding the movement of the first magnet 3 is arranged in the upper shell 1. The first magnet 3 is movably arranged in the guide track 111. In this embodiment, the upper shell 1 includes a side plate 11 detachably arranged on opposite sides of the upper shell 1. The guide track 111 is fixedly arranged on the side plate 11. The first magnet 3 is in a semicircular ring structure, and the second magnet 4 is also in a semicircular ring structure. The first magnet 3 and the second magnet 4 enclose a complete circular ring structure. The first magnet 3 is movably arranged in the upper shell 1. Specifically, the first magnet 3 slides along an arc-shaped motion trajectory in the guide track 111, and the arc-shaped motion trajectory is co-centered with the first magnet 3. The two end faces of the first magnet 3 can pass through the upper shell 1; the second magnet 4 is fixedly arranged in the lower shell 2, and the two end faces of the second magnet 4 extend to the surface of the lower shell 2. When the driving member drives the upper shell 1 to flip toward the lower shell 2 to close, since the first magnet 3 is movably arranged in the upper shell 1, when closed, under the strong magnetic effect between the first magnet 3 and the second magnet 4, the first magnet 3 movably adjusts the angles of its two end faces in the guide rail 111 to achieve automatic alignment of the end faces of the first magnet 3 and the second magnet 4. The contact end faces of the first magnet 3 and the second magnet 4 are aligned, so that the magnetic flux passing through reaches the maximum, which is conducive to reducing the magnetic loss of the CT power supply equipment and improving the power supply efficiency.

[0027] Reference Figures 2 to 3 , the first magnet 3 is provided with a limit block 31 on both sides facing the side plate 11, and the side plates 11 on both sides are provided with a limit portion 112 matched with the limit block 31. When the first magnet 3 moves to the end point of the motion path, the limit block 31 abuts against the limit portion 112. The limit block 31 cooperates with the limit portion 112 to limit the range of motion of the first magnet 3, which can effectively reduce the possibility of the first magnet 3 sliding out of the housing due to excessive range during the activity. In this embodiment, the limit block 31 is made of insulating material such as rubber; the limit portion 112 is a limit step, and a limit groove 1121 is provided on the limit step. When the first magnet 3 slides on the guide rail 111, the limit block 31 moves in the limit groove 1121. When the first magnet 3 moves to the end point of the path, the limit block 31 abuts against the groove wall of the limit groove 1121, thereby achieving the purpose of limiting the first magnet 3.

[0028] Reference Figure 3 , an elastic member is arranged in the upper shell 1, and the elastic member is used to press the first magnet 3 toward the second magnet 4. The elastic member is arranged to make the first magnet 3 and the second magnet 4 more closely combined, so as to improve the sealing of the connection of the power-taking device. In this embodiment, the elastic member is a spring 6, one side of which is clamped on the inner wall of the upper shell 1 away from the lower shell 2, and the other end of the spring 6 is abutted against the side of the first magnet 3 facing away from the second magnet 4, and the spring 6 is abutted against the first magnet 3 in an arc shape. The spring 6 is arranged in an arc shape, which can better fit the curve of the first magnet 3, and can make the first magnet 3 more uniform and stable in force, which is conducive to better pressing the first magnet 3 toward the second magnet 4, and ensuring the reliability of the contact between the first magnet 3 and the second magnet 4. In practical applications, the elastic member can be adaptively changed according to actual needs, such as selecting other elastic elements such as torsion springs.

[0029] Reference Figure 3 and Figure 4Furthermore, a sealing gasket 5 is provided on the end surface of the upper shell 1 facing the lower shell 2. There are two sealing gaskets 5, which are respectively fixed on the two end surfaces of the upper shell 1 facing the lower shell 2, that is, the sealing gasket 5 is located at the outer ring of the contact end of the first magnet 3 and the second magnet 4. Specifically, the sealing gasket 5 is provided with a cantilever structure, that is, the cross section of the sealing gasket 5 is a "7"-shaped structure. The cantilever structure is provided so that the sealing gasket 5 has a larger deformation amount. When there is a gap between the contact end surfaces of the upper shell 1 and the lower shell 2, it is ensured that the sealing gasket 5 can fully close the gap to better achieve a good sealing effect between the upper shell 1 and the lower shell 2. In addition, the CT power supply equipment is installed outdoors. When external liquid flows through the contact end surface of the upper shell 1 and the lower shell 2, when the liquid flows through the cantilever structure of the sealing gasket 5, the cantilever structure of the sealing gasket 5 can be tightly adsorbed on the contact end surface of the lower shell 2 under the action of hydraulic pressure, effectively blocking the external liquid from entering the equipment. A sealing gasket 5 is provided to seal the connection between the upper shell 1 and the lower shell 2 to prevent water and dust. When the first magnet 3 and the second magnet 4 are closed, the sealing gasket 5 is compressed. The sealing gasket 5 can isolate the magnet from the external environment, which is beneficial to ensure the waterproof and dustproof performance of the equipment, and effectively reduce the possibility of rust and damage of the magnet and the coil 8, so as to extend the service life of the equipment.

[0030] Reference Figure 3 An upper positioning step 12 is provided on the end face of the upper shell 1 facing the lower shell 2, and a lower positioning step 22 matching the upper positioning step 12 is provided on the side of the lower shell 2 facing the upper shell 1. When the driving member drives the upper shell 1 and the lower shell 2 to close, the upper positioning step 12 is buckled with the lower positioning step 22, and the sealing gasket 5 is located in the upper positioning step 12. The upper positioning step 12 is buckled with the lower positioning step 22, so that the upper shell 1 and the lower shell 2 can be closely matched, further ensuring the sealing of the equipment, and the upper positioning step 12 and the lower positioning step 22 also play a guiding and positioning role, which greatly reduces the possibility of mutual misalignment between the upper shell 1 and the lower shell 2 when the shell is in a closed state, and is also conducive to assisting the alignment of the end faces between the first magnet 3 and the second magnet 4.

[0031] Reference Figure 3 The CT power taking device also includes an elastic wire clamp 9, which is used to press the high-voltage cable 10 to install the CT power taking device on the overhead transmission line. The elastic wire clamp 9 is rotatably set on the lower shell 2, and the elastic wire clamp 9 is located between the upper shell 1 and the lower shell 2. When the CT power taking device is installed on the cable 10, the elastic wire clamps 9 on both sides clamp the cable 10 to achieve the installation and fixation of the device.

[0032] The implementation principle of the utility model is as follows:

[0033] The first magnet 3 is movably arranged in the upper shell 1 along a motion trajectory. When the upper shell 1 and the lower shell 2 are closed, the first magnet 3 can slide in the upper shell 1 according to the position and angle of the second magnet 4 under the magnetic action of the second magnet 4, so as to realize automatic leveling of the contact end faces of the first magnet 3 and the second magnet 4, so that the two are tightly fitted, and the installation quality is effectively improved; and under the action of the sealing gasket 5, the connection between the first magnet 3 and the second magnet 4 is effectively sealed, which effectively improves the sealing performance of the equipment.

[0034] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A CT power supply device for automatic leveling, pressing and sealing of a transformer, characterized in that: It includes a shell, a magnet, a coil and a sealing gasket. The shell includes an upper shell and a lower shell. The upper shell is rotatably set on the lower shell. The lower shell is provided with a driving member for driving the upper shell to rotate toward the lower shell. The magnet includes a first magnet and a second magnet. The first magnet is movably set in the upper shell, and a guide track is provided in the upper shell. The first magnet can be movably set along a circular arc motion trajectory in the guide track. The second magnet is fixedly set in the lower shell. An elastic member for driving the first magnet to be close to the second magnet is provided in the upper shell. The sealing gasket is set at the end of the upper shell.

2. The CT power supply device for automatic leveling, pressing and sealing of a mutual inductor according to claim 1, characterized in that: The first magnet is in a semicircular ring structure, the second magnet is in a semicircular ring structure, and two end faces of the first magnet can pass through the upper shell. The first magnet and the second magnet are surrounded by a circular ring structure, and the motion trajectory is cocentric with the first magnet.

3. The CT power supply device for automatic leveling, pressing and sealing of a mutual inductor according to claim 2, characterized in that: The elastic member is a spring sheet, one side of which is clamped on the inner wall of the upper shell away from the lower shell, and the other side of which is abutted against the side of the first magnet facing away from the second magnet, and the spring sheet abuts against the side of the first magnet in an arc shape.

4. The CT power taking device for automatic leveling, pressing and sealing of a mutual inductor according to claim 2, characterized in that: The driving member is a torsion spring, and a mounting shaft is provided on the lower shell. The torsion spring is mounted on the mounting shaft, and one side torsion arm of the torsion spring abuts against the lower shell, and the other side torsion arm abuts against the upper shell. When the torsion spring is elastically released, it drives the upper shell and the lower shell to close.

5. The CT power taking device for automatic leveling, pressing and sealing of a mutual inductor according to claim 1, characterized in that: An upper positioning step is arranged on an end surface of the upper shell body facing the lower shell body, and a lower positioning step matching the upper positioning step is arranged on the lower shell body, and the upper positioning step is buckled with the lower positioning step.

6. The CT power taking device for automatic leveling, pressing and sealing of a mutual inductor according to claim 5, characterized in that: There are two sealing pads, which are fixedly arranged at two ends of the upper shell body respectively, and the sealing pads are located in the upper positioning step.

7. The CT power supply device for automatic leveling, pressing and sealing of a mutual inductor according to claim 6, characterized in that: The sealing gasket is provided with a cantilever structure, and the cross section of the sealing gasket is a "7"-shaped structure.

8. The CT power taking device for automatic leveling, pressing and sealing of a mutual inductor according to claim 1, characterized in that: The upper shell includes side panels that are detachably arranged on opposite sides, the guide rails are fixedly arranged on the side panels, the first magnet is fixedly provided with limit blocks on opposite sides of the side panels, and the side panels are provided with limit parts that cooperate with the limit blocks. When the first magnet slides to the end point of the active path, the limit block abuts against the limit part.

9. The CT power taking device for automatic leveling, pressing and sealing of a mutual inductor according to claim 7, characterized in that: It also includes an elastic wire clamp for pressing the high-voltage cable. The elastic wire clamp is rotatably arranged on the lower shell, and the elastic wire clamp is located between the upper shell and the lower shell.

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