Clip-on current transformer
By designing a clamp-shaped current transformer and automatically reset the core by releasing elastic force by spring, the problem of short grip arms in the prior art requires heavy force operation and no automatic reset is solved, and labor-saving and fast current detection is achieved.
Patent Information
- Application Number
- CN202420992527.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing clamp current transformer has a short grip arm, so the user needs to use more force to separate the iron core, and it does not have the function of automatic reset after separation, so it needs to apply force again.
A clamp-shaped current transformer is designed. By pressing the left clamp arm and the right clamp arm in the opposite direction, the left iron core and the right iron core are far away from each other. After entering the wire, the left clamp arm is released, the spring releases elastic force, and pushes the slider to reset the core, realizing automatic closing.
It realizes labor-saving and fast threading work, and reduces operation difficulty and effort consumption through the automatic reset function.
Smart Images
Figure CN222672791U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current transformer technology, and in particular to a clamp-on current transformer. Background Technology
[0002] A clamp-on current transformer is a device used to measure current, typically in power systems. It measures current by passing a conductor through a magnetic ring or clamp without direct contact with the conductor. This design makes current measurement possible without interrupting the circuit. Clamp-on current transformers are widely used in power system monitoring, energy management, fault diagnosis, and safety protection.
[0003] Existing clamp-on current transformers have short grips, requiring users to exert considerable force to separate the iron core. Furthermore, they lack an automatic reset function after separation, necessitating further force application. Utility Model Content
[0004] The purpose of this invention is to provide a clamp-on current transformer to solve the technical problems existing in the prior art.
[0005] To solve the above-mentioned technical problems, this utility model provides a clamp-type current transformer, including a left iron core and a right iron core. A left clamp arm is fixedly connected to the bottom end of the left iron core, and a right clamp arm is fixedly connected to the bottom end of the right iron core. A support block is fixedly connected to the side wall of the right clamp arm, and a turntable is fixedly connected to the side wall of the left clamp arm. A rotating shaft is rotatably inserted on the support block, and the turntable is fixedly connected to the rotating shaft. A connecting rod is rotatably connected to the turntable, and a push rod is rotatably connected to the other end of the connecting rod. A slide bar is fixedly connected to the other end of the push rod, and an elastic component is rotatably connected to the other end of the slide bar. A groove is formed on the right clamp arm, and the elastic component is fixedly installed in the groove.
[0006] Preferably, the elastic component includes four rectangularly distributed blocks fixed to the inner wall of the groove, a guide rod is fixedly connected between every two blocks, the guide rod is movably connected through the slide bar, and a spring is fixedly connected between the slide bar and the blocks.
[0007] Preferably, the inner diameter of the spring is larger than the outer diameter of the guide rod, and the spring is sleeved on the guide rod.
[0008] Preferably, the guide rod is round, and there are two guide rods.
[0009] Preferably, the left and right clamp arms are arranged in a V-shape.
[0010] Preferably, the left and right iron cores form a molding space.
[0011] Preferably, a bearing is fixedly embedded inside the support block, and one end of the rotating shaft is inserted into the bearing.
[0012] Preferably, an electrical wire is fixedly connected to the bottom end of the right clamp arm.
[0013] By adopting the above technical solution, this utility model has the following beneficial effects:
[0014] 1. In this utility model, by pressing the left and right clamp arms in opposite directions, the left and right iron cores are moved away from each other. Then, the wire is inserted into the space formed by the left and right iron cores. Then, the left clamp arm is released, and the spring releases its elastic force, pushing the slider to move towards the left clamp arm, so that the left and right iron cores are reset and closed. This method can save effort and quickly perform the wire threading work.
[0015] 2. In this utility model, the lever arms of the left and right clamp arms are designed to be relatively long and arranged in a figure-eight shape. This allows for effective hand force to separate the left and right iron cores, insert wires, and realize current detection. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A front view structural diagram of a clamp-on current transformer provided for an embodiment of this utility model;
[0018] Figure 2 for Figure 1 Enlarged structural diagram at point A;
[0019] Figure 3 This is a rear view structural diagram of a clamp-on current transformer provided for an embodiment of the present utility model.
[0020] Reference numerals: 1. Left iron core; 2. Right iron core; 3. Left clamp arm; 4. Right clamp arm; 401. Groove; 5. Support block; 6. Turntable; 7. Rotating shaft; 8. Connecting rod; 9. Push rod; 10. Slide bar; 11. Elastic component; 1101. Stop block; 1102. Guide rod; 1103. Spring; 12. Wire. Detailed Implementation
[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] The present invention will be further explained below with reference to specific embodiments.
[0025] like Figure 1-3 As shown, this embodiment provides a clamp-type current transformer, including a left iron core 1 and a right iron core 2. A left clamp arm 3 is fixedly connected to the bottom end of the left iron core 1, and a right clamp arm 4 is fixedly connected to the bottom end of the right iron core 2. A support block 5 is fixedly connected to the side wall of the right clamp arm 4, and a turntable 6 is fixedly connected to the side wall of the left clamp arm 3. A rotating shaft 7 is rotatably inserted on the support block 5, and the turntable 6 is fixedly connected to the rotating shaft 7. A connecting rod 8 is rotatably connected to the turntable 6, and a push rod 9 is rotatably connected to the other end of the connecting rod 8. A slide bar 10 is fixedly connected to the other end of the push rod 9, and an elastic component 11 is rotatably connected to the other end of the slide bar 10. A groove 401 is provided on the right clamp arm 4, and the elastic component 11 is fixedly installed in the groove 401.
[0026] The elastic component 11 includes four rectangularly distributed blocks 1101 fixed to the inner wall of the groove 401. A guide rod 1102 is fixedly connected between every two blocks 1101. The guide rod 1102 is movably connected through the slide bar 10. A spring 1103 is fixedly connected between the slide bar 10 and the blocks 1101.
[0027] By pressing the left clamp arm 3 and the right clamp arm 4 in opposite directions, the left iron core 1 and the right iron core 2 are moved away from each other. Then, the wire is inserted into the space formed by the left iron core 1 and the right iron core 2. Then, the left clamp arm 3 is released. At this time, the spring 1103 releases its elastic force and pushes the slider 10 to move in the direction of the left clamp arm 3, so that the left iron core 1 and the right iron core 2 are reset and closed. This method can save effort and quickly perform the wire threading work.
[0028] It should be further explained that the inner diameter of the spring 1103 is larger than the outer diameter of the guide rod 1102. The spring 1103 is sleeved on the guide rod 1102, which allows the spring 1103 to release the elastic force better.
[0029] The guide rod 1102 is round and there are two guide rods 1102, which realize the linear guidance of the slider 10 and ensure that the slider 10 can only move in a straight line.
[0030] The lever arms of the left clamp arm 3 and the right clamp arm 4 are designed to be relatively long, and the left clamp arm 3 and the right clamp arm 4 are distributed in a figure-eight shape. This allows for effective hand force to separate the left iron core 1 and the right iron core 2, insert wires, and realize current detection.
[0031] The left iron core 1 and the right iron core 2 form an O-type space. When detecting the current, the wire needs to be passed through the O-type space.
[0032] In addition, a bearing is fixedly embedded inside the support block 5, and one end of the rotating shaft 7 is inserted into the bearing. The bearing facilitates the rotation of the rotating shaft 7 and reduces wear during rotation.
[0033] The bottom end of the right clamp arm 4 is fixedly connected to a wire 12, and the other end of the wire 12 is fixedly connected to a plug. The plug is connected to an ammeter, which is used to display the measured current value. This is existing technology.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A clamp-on current transformer, characterized in that: The invention comprises a left iron core (1) and a right iron core (2), wherein the bottom end of the left iron core (1) is fixedly connected to a left clamp arm (3), the bottom end of the right iron core (2) is fixedly connected to a right clamp arm (4), the side wall of the right clamp arm (4) is fixedly connected to a support block (5), the side wall of the left clamp arm (3) is fixedly connected to a turntable (6), a rotating shaft (7) is rotatably inserted on the support block (5), the turntable (6) is fixedly connected to the rotating shaft (7), a connecting rod (8) is rotatably connected to the turntable (6), the other end of the connecting rod (8) is rotatably connected to a push rod (9), the other end of the push rod (9) is fixedly connected to a slide bar (10), the other end of the slide bar (10) is rotatably connected to an elastic component (11), the right clamp arm (4) is provided with a groove (401), and the elastic component (11) is fixedly installed in the groove (401).
2. A clamp-on current transformer according to claim 1, characterized in that: The elastic component (11) comprises four rectangularly distributed blocks (1101) fixed to the inner wall of the groove (401), a guide rod (1102) being fixedly connected between every two of the blocks (1101), the guide rod (1102) movably passing through the slide bar (10), and a spring (1103) being fixedly connected between the slide bar (10) and the block (1101).
3. A clamp-on current transformer according to claim 2, characterized in that: The inner diameter of the spring (1103) is greater than the outer diameter of the guide rod (1102), and the spring (1103) is sleeved on the guide rod (1102).
4. A clamp-on current transformer according to claim 3, characterized in that: The guide rod (1102) is in the shape of a round rod, and there are two guide rods (1102).
5. A clamp-on current transformer according to claim 4, characterized in that: The left clamp arm (3) and the right clamp arm (4) are distributed in an eight-shaped shape.
6. A clamp-on current transformer according to claim 1, characterized in that: The left iron core (1) and the right iron core (2) form a O-shaped space.
7. A clamp-on current transformer according to claim 1, characterized in that: A bearing is fixedly embedded in the support block (5), and one end of the rotating shaft (7) is inserted into the bearing.
8. A clamp-on current transformer according to claim 1, characterized in that: The bottom end of the right clamp arm (4) is fixedly connected to an electric wire (12).