Straight-through current transformer

Abstract

The utility model discloses a straight-through current transformer, which relates to the technical field of current transformers and comprises two mounting brackets and a dismounting and fixing device, the disassembly and assembly fixing device comprises two semicircular sliding plates, four fixing cylinders, two pressing rods, two springs, an upper insulating shell, four protruding blocks and an upper iron core, the two semicircular sliding plates are slidably installed in the two semicircular sliding grooves respectively, and the four fixing cylinders are fixedly connected to the upper ends of the two semicircular sliding plates respectively; the upper insulating shell and the lower insulating shell are arranged to be of a detachable structure, a worker can directly sleeve the surface of the upper insulating shell with a current-carrying conductor, and the current-carrying conductor can be conveniently taken out of the upper insulating shell, so that the current-carrying conductor can be conveniently taken out of the lower insulating shell, and the working efficiency is improved. A worker does not need to dismount the current-carrying conductor for installation, and the installation process of the current-carrying conductor is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a through-type current transformer. Background Art

[0002] The busbar current transformer is a low-voltage indoor busbar-type cast-insulated and plastic-shell insulated current transformer, commonly known as the through-type current transformer. The current transformer is widely used in the measurement, power metering and relay protection circuits of low-voltage systems. Since it can directly use the current-carrying conductor through the window hole as the primary winding and the number of windings (turns) of the primary winding can be changed as needed to adapt to circuits with different rated currents, it is flexible and convenient to use. Due to its simple structure, small size and low price, it has been widely used.

[0003] The currently published patent: CN211577248U, discloses a through-type current transformer. Through the provided fixing mechanism, during installation, the staff directly inserts the fixing mechanism into the matching fixing frame. At the same time of insertion, due to the squeezing of external force, the movable steel ball shrinks inside the shrinkage groove. When inserted to the predetermined position, the movable steel ball is pushed out by the reset spring for automatic fixation, so that the staff can complete the fixed installation work without the cooperation of tools.

[0004] Based on the above search, it was found that the above patent has the following problems when used: the through-type current transformer needs to pass the current-carrying conductor through the window hole when in use. Therefore, after the current-carrying conductor has been installed, one end of the current-carrying conductor needs to be removed and the winding operation with the through-type current transformer needs to be performed. The current-carrying conductor cannot be directly put on the surface of the transformer. The staff needs to remove one end of the current-carrying conductor before the installation process is more cumbersome, which affects the staff's convenience in installing the current-carrying conductor. Utility Model Content

[0005] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a through-type current transformer, which can solve the problem that the current-carrying conductor cannot be directly put on the surface of the transformer, and the staff needs to remove one end of the current-carrying conductor before the installation process is cumbersome, affecting the staff's convenience in installing the current-carrying conductor.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a through-type current transformer, comprising two mounting brackets and a disassembly and fixing device; the tops of the two mounting brackets are fixedly connected to a fixed base, the top of the fixed base is provided with a slide groove, the inside of the slide groove is slidably connected to a slider, the top of the slider is fixedly connected to a lower insulating shell, and the top of the lower insulating shell is provided with two semi-circular ring slide grooves; the disassembly and fixing device comprises two semi-circular ring slides, four fixed cylinders, two pressure rods, two springs, an upper insulating shell, four protrusions and an upper iron core, the two semi-circular ring slides are respectively slidably installed in the inside of the two semi-circular ring slide grooves, the four fixed cylinders are respectively fixedly connected to the upper ends of the two semi-circular ring slides, the two pressure rods are slidably connected to the inside of the lower insulating shell, and the opposite ends of the two pressure rods are respectively fixedly connected to the surfaces of the two semi-circular ring slides, the upper insulating shell is arranged on the top of the lower insulating shell, and the four protrusions are fixedly connected to the bottom of the upper insulating shell.

[0007] Preferably, two bolts are installed on the top of the two mounting brackets, and the four bolts are respectively threadedly connected to the left and right ends of the slider.

[0008] Preferably, a lower iron core is installed inside the lower insulating shell.

[0009] Preferably, the two springs are fixedly connected to the surfaces of the two semi-circular ring slides respectively, and one end of the spring away from the semi-circular ring slide is fixedly connected to the inner wall of the semi-circular ring slot.

[0010] Preferably, the surfaces of the four protrusions are each provided with a fixing hole, and the four fixing cylinders are respectively slidably engaged in the inside of the four fixing holes.

[0011] Preferably, the upper iron core is installed inside the upper insulating shell.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The through-type current transformer has a detachable upper insulating shell and a lower insulating shell. Workers can directly put the current-carrying conductor on the surface of the upper insulating shell. Workers no longer need to remove the current-carrying conductor for installation, which simplifies the installation process of the current-carrying conductor and improves the convenience of workers in installing the current-carrying conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the overall structure of a through-type current transformer of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the lower insulating shell of the utility model;

[0017] Figure 3 This is a schematic diagram of the bottom structure of the upper insulating shell of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the lower insulating shell of the utility model.

[0019] Figure numerals: 1. Mounting bracket; 2. Fixed base; 3. Slide groove; 4. Slider; 5. Bolt; 6. Lower insulating shell; 7. Lower iron core; 8. Semi-circular ring slide groove; 9. Semi-circular ring slide; 10. Fixed cylinder; 11. Pressure rod; 12. Upper insulating shell; 13. Bump; 14. Fixed card hole; 15. Upper iron core; 16. Spring. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of this utility model, terms such as "greater than," "less than," and "exceed" are understood to exclude the number indicated, while terms such as "above," "below," and "within" are understood to include the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] See also Figure 1-4The utility model provides a technical solution: a through-type current transformer, including two mounting brackets 1 and a disassembly and assembly fixing device, the tops of the two mounting brackets 1 are fixedly connected to a fixed base 2, the top of the fixed base 2 is provided with a slide groove 3, the inside of the slide groove 3 is slidably connected to a slider 4, two bolts 5 are installed on the top of the two mounting brackets 1, the four bolts 5 are respectively threadedly connected to the left and right ends of the slider 4, the top of the slider 4 is fixedly connected to a lower insulating shell 6, the inside of the lower insulating shell 6 is provided with a lower iron core 7, and the top of the lower insulating shell 6 is provided with two semicircular ring slide grooves 8.

[0025] The staff slides the lower insulating shell 6 and drives the slider 4 to slide downward into the interior of the slide groove 3. Then the staff fixes the slider 4 by rotating the four bolts 5, and then fixes the slider 4 inside the fixed base 2. The slider 4 and the lower insulating shell 6 are installed and fixed by the four bolts 5, which improves the stability of the installation and fixation of the through-type current transformer.

[0026] The disassembly and fixing device includes two semi-circular ring slides 9, four fixed cylinders 10, two pressure rods 11, two springs 16, an upper insulating shell 12, four protrusions 13 and an upper iron core 15. The two semi-circular ring slides 9 are respectively slidably mounted on the inside of the two semi-circular ring slides 8, the four fixed cylinders 10 are respectively fixedly connected to the upper ends of the two semi-circular ring slides 9, the two pressure rods 11 are slidably connected to the inside of the lower insulating shell 6, the opposite ends of the two pressure rods 11 are respectively fixedly connected to the surfaces of the two semi-circular ring slides 9, the two springs 16 are respectively fixedly connected to the surfaces of the two semi-circular ring slides 9, and the end of the spring 16 away from the semi-circular ring slide 9 is fixedly connected to the inner wall of the semi-circular ring slide 8, the upper insulating shell 12 is arranged on the top of the lower insulating shell 6, the four protrusions 13 are fixedly connected to the bottom of the upper insulating shell 12, the surfaces of the four protrusions 13 are provided with fixed card holes 14, the four fixed cylinders 10 are respectively slidably clamped in the inside of the four fixed card holes 14, and the upper iron core 15 is installed in the inside of the upper insulating shell 12.

[0027] The staff first slides the two pressure rods 11 relative to each other with their fingers. The relative sliding of the two pressure rods 11 can drive the two semi-circular slides 9 to slide relative to each other and squeeze the two springs 16. The sliding of the two semi-circular slides 9 can drive the four fixed cylinders 10 to slide relative to each other. Then the staff slides the upper insulating shell 12 downward and drives the four protrusions 13 to slide downward into the interior of the two semi-circular slide grooves 8. At this time, after the staff loosens the two pressure rods 11, the two springs 16 can push the two semi-circular slides 9 to slide oppositely and drive the four fixed cylinders 10 to slide. Entering the four fixing holes 14, the upper insulating shell 12 can be fixedly installed on the top of the lower insulating shell 6 through the connection between the four fixing cylinders 10 and the four protrusions 13, and the lower iron core 7 and the upper iron core 15 are in contact. By setting the upper insulating shell 12 and the lower insulating shell 6 to a detachable structure, the staff can directly put the current-carrying conductor on the surface of the upper insulating shell 12. The staff no longer needs to remove the current-carrying conductor to install it, which simplifies the installation process of the current-carrying conductor and improves the convenience of the staff in installing the current-carrying conductor.

[0028] When the two springs 16 are released, the two semi-circular slide plates 9 can slide relative to each other and squeeze the two springs 16. The sliding of the two semi-circular slide plates 9 can drive the four fixed cylinders 10 to slide relative to each other. Then the staff member slides the upper insulating shell 12 downward and drives the four protrusions 13 to slide downward into the interior of the two semi-circular slide grooves 8. At this time, after the staff member loosens the two pressure rods 11, the two springs 16 can push the two semi-circular slide plates 9 to slide oppositely and drive the four fixed cylinders 10 to slide into the four fixed card holes 14, and the upper insulating shell 12 can be fixedly installed on the top of the lower insulating shell 6, and the lower iron core 7 and the upper iron core 15 can be in contact. The staff member can directly put the current-carrying conductor on the surface of the upper insulating shell 12, which simplifies the installation process of the current-carrying conductor.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A through-type current transformer, characterized in that: include: Two mounting brackets (1) and a disassembly and assembly fixture; The tops of the two mounting brackets (1) are fixedly connected to a fixed base (2), a slide groove (3) is provided on the top of the fixed base (2), a slider (4) is slidably connected inside the slide groove (3), a lower insulating shell (6) is fixedly connected to the top of the slider (4), and two semi-circular slide grooves (8) are provided on the top of the lower insulating shell (6); The disassembly and assembly fixing device comprises two semi-circular slides (9), four fixed cylinders (10), two pressure rods (11), two springs (16), an upper insulating shell (12), four protrusions (13) and an upper iron core (15), wherein the two semi-circular slides (9) are respectively slidably mounted inside the two semi-circular slide grooves (8), the four fixed cylinders (10) are respectively fixedly connected to the upper ends of the two semi-circular slides (9), the two pressure rods (11) are both slidably connected to the inside of the lower insulating shell (6), the opposite ends of the two pressure rods (11) are respectively fixedly connected to the surfaces of the two semi-circular slides (9), the upper insulating shell (12) is arranged on the top of the lower insulating shell (6), and the four protrusions (13) are all fixedly connected to the bottom of the upper insulating shell (12).

2. A through-type current transformer according to claim 1, characterized in that: Two bolts (5) are installed on the top of each of the two mounting brackets (1), and the four bolts (5) are respectively threadedly connected to the left and right ends of the slider (4).

3. A through-type current transformer according to claim 1, characterized in that: A lower iron core (7) is installed inside the lower insulating shell (6).

4. A through-type current transformer according to claim 3, characterized in that: The two springs (16) are respectively fixedly connected to the surfaces of the two semi-circular ring slides (9), and one end of the spring (16) away from the semi-circular ring slide (9) is fixedly connected to the inner wall of the semi-circular ring slot (8).

5. The through-type current transformer according to claim 1, characterized in that: The surfaces of the four protrusions (13) are each provided with a fixing clamping hole (14), and the four fixing cylinders (10) are respectively slidably clamped in the inside of the four fixing clamping holes (14).

6. A through-type current transformer according to claim 1, characterized in that: The upper iron core (15) is installed inside the upper insulating shell (12).

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