Fixed bus type current transformer

Abstract

The utility model relates to a fixed bus type current transformer, which belongs to the technical field of current transformers and comprises a base, the upper portion of the base is fixedly connected with a support, the upper portion of the support is fixedly connected with a transformer body, the side end of the transformer body is rotatably connected with a rotary table, and the inner side of the rotary table is fixedly connected with a helical tooth ring. A clamping mechanism is arranged in the mutual inductor main body, a chuck mechanism is arranged in the mutual inductor main body, the clamping mechanism comprises a sliding column which is slidably connected to the interior of the mutual inductor main body, a sliding groove is formed in the surface of the sliding column, and the sliding column is slidably connected with a bevel gear through the sliding groove. The bus passes through the hole of the mutual inductor main body and is placed on the chuck mechanism below, and the plurality of chuck mechanisms can be driven to synchronously move inwards by rotating the turntable by utilizing the linkage of the helical gear ring and the clamping mechanism, so that the bus can be quickly fixed.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and specifically to a fixed busbar type current transformer. Background Technology

[0002] Current transformers are key devices used for measurement, protection and control in power systems. Their core function is to convert large currents into smaller currents proportionally, while achieving electrical isolation between the high-voltage side and the low-voltage side.

[0003] According to the public announcement (CN222281771U), a current transformer for easy fixing of busbars is disclosed. This technology discloses "including a transformer body, an integral mounting plate at the bottom of the transformer body, a busbar through hole in the middle of the transformer body, an auxiliary shell mounted on the inner side of the transformer body, an auxiliary side strip integrally provided on the front side of the auxiliary shell, a fine-tuning screw connected to the center of the auxiliary side strip, and a pressure seat mounted on the inner end of the fine-tuning screw, etc., which has the technical effect of facilitating auxiliary fixing of the busbar as needed during assembly and use, making assembly and use more convenient."

[0004] However, compared with the above text, this fixing method requires placing and holding the busbar in the center, while rotating the three screws to fix it from three directions. This operation requires the cooperation of many people and is too time-consuming and labor-intensive.

[0005] To address the aforementioned problems, this application proposes a fixed busbar type current transformer. Utility Model Content

[0006] This utility model addresses the technical problems existing in the prior art by providing a fixed busbar type current transformer.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A fixed busbar type current transformer includes a base, a bracket is fixedly connected to the upper part of the base, a transformer body is fixedly connected to the upper part of the bracket, a turntable is rotatably connected to the side end of the transformer body, a helical toothed ring is fixedly connected to the inner side of the turntable, a clamping mechanism is provided inside the transformer body, and a chuck mechanism is provided inside the transformer body.

[0008] The clamping mechanism includes a sliding column slidably connected inside the transformer body. The surface of the sliding column is provided with a sliding groove. A helical gear is slidably connected to the sliding column through the sliding groove. The side end of the helical gear is rotatably connected to the transformer body. The surface of the helical gear meshes with a helical gear ring. The mechanism is designed so that the rotation of the helical gear ring can drive the rotation of the helical gear.

[0009] A threaded rod is fixedly connected to the side end of the sliding column. The surface of the threaded rod is threadedly connected to the transformer body. A push plate is rotatably connected to the side end of the threaded rod. A guide rod is fixedly connected to the side end of the push plate. The surface of the guide rod is slidably connected to the transformer body. This arrangement allows the push plate to slide inside the transformer body under the constraint of the threaded rod and the guide rod.

[0010] The clamping mechanism includes a clamping rod fixedly connected to the side end of the push plate. A sliding ball is fixedly connected to the surface of the clamping rod. A rotating seat is rotatably connected to the surface of the sliding ball. A side clamping plate is fixedly connected to the surface of the rotating seat. A main clamping plate is hinged to the side end of the side clamping plate. The side clamping plate and the main clamping plate are configured to fix the busbar under the push of the push plate.

[0011] The beneficial effects of this utility model are: the busbar is passed through the hole in the transformer body and placed on the clamping mechanism below. By rotating the turntable, the linkage between the helical tooth ring and the clamping mechanism can be used to drive multiple clamping mechanisms to move inward synchronously, thereby quickly fixing the busbar.

[0012] By setting the side clamps and main clamps so that they can contact and compress the busbar in one direction through three surfaces, the contact area is increased, making the busbar more firmly fixed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the threaded rod and its related three-dimensional structure according to the present invention;

[0015] Figure 3 This is a schematic diagram of the helical gear and its related three-dimensional structure according to the present invention;

[0016] Figure 4 This is a schematic diagram of the main clamping plate and its related three-dimensional structure of the present invention.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Base; 2. Bracket; 3. Current transformer body; 4. Turntable; 5. Helical gear ring;

[0019] 6. Clamping mechanism; 601. Sliding column; 602. Sliding groove; 603. Helical gear; 604. Threaded rod; 605. Push plate; 606. Guide rod;

[0020] 7. Clamping mechanism; 701. Clamping rod; 702. Sliding ball; 703. Rotary seat; 704. Side clamping plate; 705. Main clamping plate. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0024] Reference Figures 1-2 A fixed busbar current transformer includes a base 1, a bracket 2 fixedly connected to the upper part of the base 1, a transformer body 3 fixedly connected to the upper part of the bracket 2, a turntable 4 rotatably connected to the side end of the transformer body 3, a helical toothed ring 5 fixedly connected to the inner side of the turntable 4, a clamping mechanism 6 and a clamping mechanism 7 are provided inside the transformer body 3. The busbar is passed through the hole of the transformer body 3 and placed on the clamping mechanism 7 below. By rotating the turntable 4, the helical toothed ring 5 and the clamping mechanism 6 can be linked together to drive multiple clamping mechanisms 7 to move inward, thereby fixing the busbar.

[0025] Reference Figures 1-3The clamping mechanism 6 includes three sliding columns 601 slidably connected inside the transformer body 3. One of them is located directly below the transformer body 3. The outer wall of the sliding column 601 is adapted to the inner wall of the transformer body 3 at this location. A groove 602 is formed on the surface of the sliding column 601. A helical gear 603 is slidably connected to the sliding column 601 through the groove 602. The side end of the helical gear 603 is rotatably connected to the transformer body 3. The outer circumference of the helical gear 603 at this location is equal to the inner circumference of the transformer body 3 at this location. The surface of the helical gear 603 meshes with the helical gear ring 5. The surface of the helical gear 603 is adapted to the surface of the helical gear ring 5. By rotating the turntable 4, the helical gear ring 5 is driven to rotate, so that the helical gear 603, under the constraint of the helical gear ring 5, drives the sliding column 601 to rotate through the groove 602.

[0026] Reference Figures 1-3 A threaded rod 604 is fixedly connected to the side end of the sliding column 601. The surface of the threaded rod 604 is threadedly connected to the transformer body 3. The outer wall of the threaded rod 604 is adapted to the inner wall of the transformer body 3 at this location. A push plate 605 is rotatably connected to the side end of the threaded rod 604. The outer circumference of the threaded rod 604 at this location is equal to the inner circumference of the push plate 605 at this location. A guide rod 606 is fixedly connected to the side end of the push plate 605. The surface of the guide rod 606 is slidably connected to the transformer body 3. The outer circumference of the guide rod 606 is equal to the inner circumference of the transformer body 3 at this location. When the sliding column 601 rotates, it drives the threaded rod 604 to rotate, causing the push plate 605 to move inward under the constraint of the threaded rod 604 and the guide rod 606.

[0027] Reference Figures 1-4 The clamping mechanism 7 includes two clamping rods 701 fixedly connected to the side end of the threaded rod 604. A sliding ball 702 is fixedly connected to the surface of the clamping rod 701, and a rotating seat 703 is rotatably connected to the surface of the sliding ball 702. The outer wall of the sliding ball 702 is adapted to the inner wall of the rotating seat 703. A side clamping plate 704 is fixedly connected to the surface of the rotating seat 703. Three side clamping plates 704 are provided. A main clamping plate 705 is hinged to the side end of the side clamping plate 704. When the main clamping plate 705 contacts the surface of the busbar under the drive of the clamping mechanism 6, the main clamping plate 705 is pressured and moves outward, causing the side clamping plate 704 hinged to it to rotate on the sliding ball 702 using the rotating seat 703. This makes the surfaces of the side clamping plate 704 and the main clamping plate 705 tangent to the surface of the busbar, and all three surfaces contact the busbar, increasing the contact area and making the busbar more firmly fixed.

[0028] Working principle:

[0029] The fixed busbar current transformer first passes the busbar through the hole in the transformer body 3 and places it on the main clamping plate 705 below. Rotating the turntable 4 drives the helical gear ring 5 to rotate, so that the helical gear 603, under the constraint of the helical gear ring 5, drives the sliding column 601 to rotate through the sliding groove 602. When the sliding column 601 rotates, it drives the threaded rod 604 to rotate, so that the push plate 605 moves inward under the constraint of the threaded rod 604 and the guide rod 606, so that the three clamping mechanisms 7 move inward simultaneously under the constraint of the clamping mechanism 6 to fix the busbar.

[0030] In this fixed busbar current transformer, when the main clamping plate 705 contacts the surface of the busbar under the action of the clamping mechanism 6, the main clamping plate 705 is subjected to pressure and moves outward, causing the side clamping plate 704, which is hinged to it, to rotate on the slider 702 via the swivel 703. This makes the surfaces of the side clamping plate 704 and the main clamping plate 705 tangent to the surface of the busbar, and all three surfaces contact the busbar, increasing the contact area and making the busbar more firmly fixed.

[0031] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixed busbar type current transformer, comprising a base (1), characterized in that, A bracket (2) is fixedly connected to the upper part of the base (1), and a transformer body (3) is fixedly connected to the upper part of the bracket (2). A turntable (4) is rotatably connected to the side end of the transformer body (3). A helical toothed ring (5) is fixedly connected to the inner side of the turntable (4). A clamping mechanism (6) is provided inside the transformer body (3), and a clamping mechanism (7) is provided inside the transformer body (3).

2. A fixed busbar current transformer according to claim 1, characterized in that, The clamping mechanism (6) includes a sliding column (601) slidably connected inside the transformer body (3). The surface of the sliding column (601) is provided with a sliding groove (602). The sliding column (601) is slidably connected to a helical gear (603) through the sliding groove (602).

3. A fixed busbar current transformer according to claim 2, characterized in that, The side end of the helical gear (603) is rotatably connected to the transformer body (3), the surface of the helical gear (603) meshes with the helical gear ring (5), and the side end of the sliding column (601) is fixedly connected to a threaded rod (604).

4. A fixed busbar current transformer according to claim 3, characterized in that, The surface of the threaded rod (604) is threadedly connected to the transformer body (3), and a push plate (605) is rotatably connected to the side end of the threaded rod (604).

5. A fixed busbar current transformer according to claim 4, characterized in that, The push plate (605) has a guide rod (606) fixedly connected to its side end, and the surface of the guide rod (606) is slidably connected to the transformer body (3).

6. A fixed busbar current transformer according to claim 4, characterized in that, The clamping mechanism (7) includes a clamping rod (701) fixedly connected to the side end of the push plate (605), a sliding ball (702) fixedly connected to the surface of the clamping rod (701), and a rotating seat (703) rotatably connected to the surface of the sliding ball (702).

7. A fixed busbar current transformer according to claim 6, characterized in that, The surface of the rotating base (703) is fixedly connected to a side clamping plate (704), and the side end of the side clamping plate (704) is hinged to a main clamping plate (705).

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