Large-current monitoring mutual inductor

Abstract

The utility model discloses a large current monitoring mutual inductor which comprises a base, a framework and a magnetic core, the framework and the magnetic core are installed on the top of the base, and a first winding and a second winding are wound on the inner side of the framework. The blocking and limiting mechanisms are arranged between the base and the magnetic core, each blocking and limiting mechanism comprises a movable bottom column movably installed on the side face of the base, a movable sleeve rotationally installed on the top of the movable bottom column and a blocking block fixed to one side of the top end of the movable sleeve, the blocking block is pressed on the top face of the magnetic core, and each blocking and limiting mechanism further comprises a T-shaped side groove formed in the side face of the base; the large-current monitoring mutual inductor in the prior art is improved and optimized, the blocking and limiting mechanisms are additionally arranged on the large-current monitoring mutual inductor, the magnetic core can be effectively blocked and limited in the using, storing and transporting processes of the large-current monitoring mutual inductor, and even if an adhesive tape for fixing the magnetic core is unglued, the magnetic core can be prevented from falling off. And the installation stability of the magnetic core is ensured, and the use stability of the whole large-current monitoring mutual inductor is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformers, and particularly relates to a large-current monitoring transformer. Background Art

[0002] A current transformer is an instrument that measures a large current on the primary side by converting it into a small current on the secondary side based on the principle of electromagnetic induction. It consists of a base, a magnetic core, coils, and a skeleton. The magnetic core is composed of two E-shaped pieces of the same specification and is fixed by winding with tape. The coils are composed of two windings. The first winding is wound with copper wire, which is convenient and flexible to wind. The second winding is made of flat copper wire. The skeleton is used to wind the first and second windings and plays a role of isolation and fixation. This large-current monitoring transformer has a simple structure, high production efficiency, and large load current and stable performance. It can well monitor and protect power equipment and is widely used in industries such as electric power.

[0003] In actual use, most of the magnetic cores of the existing large-current monitoring transformers are installed above the base by winding with tape. Since there is no effective blocking and limiting structure designed, when the large-current monitoring transformer is in use, storage, or transportation, if the magnetic core is bumped, the fixed tape may come off, resulting in the disadvantage that the installation stability of the magnetic core is affected, and the stability of the entire large-current monitoring transformer is reduced. Therefore, the utility model needs to improve and optimize the existing large-current monitoring transformer. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a large-current monitoring transformer to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A large-current monitoring transformer, comprising

[0006] a base, a skeleton and a magnetic core installed on the top of the base, and a first winding and a second winding are wound inside the skeleton;

[0007] a plurality of blocking and limiting mechanisms arranged between the base and the magnetic core, including a movable bottom column movably installed on the side of the base, a movable sleeve rotatably installed on the top of the movable bottom column, and a blocking block fixed on one side of the top of the movable sleeve, and the blocking block presses on the top surface of the magnetic core.

[0008] Preferably, the blocking and limiting mechanism further includes a T-shaped side groove opened on the side of the base, a spring and a T-shaped side block installed in the T-shaped side groove. The T-shaped side block is movably installed in the T-shaped side groove through the spring, and one end of the T-shaped side block extends to the side of the base and is fixed to the movable bottom column. The blocking and limiting mechanism further includes a limiting block fixed on the bottom surface of the blocking block. A limiting groove corresponding to the limiting block is opened on the top surface of the magnetic core, and the limiting block is embedded in the limiting groove.

[0009] Preferably, a cylindrical groove is formed in the top surface of the T-shaped side block, and the bottom end of the spring is inserted into the cylindrical groove.

[0010] Preferably, a shaft rod is fixed on the top surface of the movable bottom column, and the movable sleeve is rotatably sleeved on the surface of the shaft rod.

[0011] Preferably, the blocking and limiting mechanism further includes a rubber pad fixed on the surface of the movable bottom column, and the top end of the rubber pad extends to the surface of the movable sleeve. An integrated positioning rubber head is provided on the top surface of the rubber pad. Two positioning grooves corresponding to the positioning rubber head are symmetrically formed in the surface of the movable sleeve, and the positioning rubber head is embedded into one of the positioning grooves.

[0012] Preferably, a dial block is fixed on the surface of the movable bottom column.

[0013] Preferably, two pins are provided at the bottom of the base.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: By improving and optimizing the large-current monitoring current transformer in the prior art, a plurality of blocking and limiting mechanisms are added thereto, which can effectively block and limit the magnetic core during the use, storage and transportation of the large-current monitoring current transformer. Even if the tape fixing the magnetic core comes off, the installation stability of the magnetic core can be ensured, and the use stability of the entire large-current monitoring current transformer can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2 is a side view of the utility model;

[0017] Figure 3 is a cross-sectional view of the blocking and limiting mechanism of the utility model;

[0018] Figure 4 is the utility model Figure 3 is a partially enlarged view of area A in;

[0019] In the figure: 1. Base; 2. Skeleton; 3. Magnetic core; 4. Pin; 5. Blocking and limiting mechanism; 51. Movable bottom column; 52. Movable sleeve; 53. Rubber pad; 54. Shaft rod; 55. Blocking block; 56. Limiting block; 57. Limiting groove; 58. T-shaped side groove; 59. Spring; 510. T-shaped side block; 511. Dial block; 512. Positioning rubber head; 513. Positioning groove; 6. Winding one; 7. Winding two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment

[0022] Please refer to Figures 1 to 4 , which is an embodiment of the present utility model. This embodiment provides a technical solution: a large-current monitoring mutual inductor, including

[0023] a base 1, a skeleton 2 installed on the top of the base 1, and a magnetic core 3. A winding one 6 and a winding two 7 are wound inside the skeleton 2. The skeleton 2 is used for winding the winding one 6 and the winding two 7 and plays an isolation role. The winding one 6 is wound with ordinary copper wire, which is convenient and flexible to wind. The winding two 7 is wound with flat copper wire;

[0024] A plurality of blocking and limiting mechanisms 5 are arranged between the base 1 and the magnetic core 3, including a movable bottom column 51 movably installed on the side of the base 1, a movable sleeve 52 rotatably installed on the top of the movable bottom column 51, and a blocking block 55 fixed on one side of the top end of the movable sleeve 52. And the blocking block 55 presses on the top surface of the magnetic core 3, which can effectively block and limit the magnetic core 3 during the use, storage and transportation of the large-current monitoring mutual inductor, ensuring its installation stability. The blocking and limiting mechanism 5 further includes a T-shaped side groove 58 opened on the side of the base 1, a spring 59 installed in the T-shaped side groove 58, and a T-shaped side block 510. The T-shaped side block 510 is movably installed in the T-shaped side groove 58 through the spring 59, and one end of the T-shaped side block 510 extends to the side of the base 1 and is fixed to the movable bottom column 51. The blocking and limiting mechanism 5 further includes a limiting block 56 fixed on the bottom surface of the blocking block 55. A limiting groove 57 corresponding to the limiting block 56 is opened on the top surface of the magnetic core 3. The limiting block 56 is embedded in the limiting groove 57, so that the blocking block 55 can stably press on the top surface of the magnetic core 3, ensuring the blocking and limiting of the magnetic core 3. If the blocking and limiting of the magnetic core 3 needs to be released subsequently, only the movable bottom column 51 and the movable sleeve 52 need to be lifted forcefully, so that the T-shaped side block 510 slides up to compress the spring 59, causing the blocking block 55 to separate from the magnetic core 3 and the limiting block 56 to move out of the limiting groove 57. Then the movable sleeve 52 can be rotated to rotate the blocking block 55 away from the top of the magnetic core 3, releasing the blocking and limiting of the magnetic core 3, and the installation or disassembly of the magnetic core 3 can be realized.

[0025] Wherein, a cylindrical groove is opened on the top surface of the T-shaped side block 510, and the bottom end of the spring 59 is inserted into the cylindrical groove to realize the limiting of the spring 59 and prevent the position of the spring 59 from shifting.

[0026] Among them, a shaft rod 54 with a T-shaped cross section is fixed on the top surface of the movable bottom column 51, and the movable sleeve 52 is rotatably sleeved on the surface of the shaft rod 54, so that the movable sleeve 52 can smoothly rotate on the top of the movable bottom column 51.

[0027] Among them, the blocking and limiting mechanism 5 further includes a rubber pad 53 adhesively fixed on the surface of the movable bottom column 51, and the top end of the rubber pad 53 extends to the surface of the movable sleeve 52. An integral positioning rubber head 512 is provided on the top surface of the rubber pad 53. Both of them are made of rubber material and will undergo elastic deformation when being squeezed. Two positioning grooves 513 corresponding to the positioning rubber head 512 are symmetrically formed on the surface of the movable sleeve 52. The positioning rubber head 512 is embedded in one of the positioning grooves 513 to realize the auxiliary positioning after the rotation of the movable sleeve 52. When the movable sleeve 52 rotates on the top of the movable bottom column 51, only by rotating the movable sleeve 52 forcefully, the positioning rubber head 512 will undergo elastic deformation and be extruded out of the positioning groove 513, and then the movable sleeve 52 can be smoothly rotated. When the movable sleeve 52 rotates 180 degrees around the shaft rod 54, the positioning rubber head 512 will be squeezed into the other positioning groove 513 to realize the re-limiting of the movable sleeve 52 after rotation.

[0028] Among them, a dial block 511 is fixed on the surface of the movable bottom column 51, which is convenient for subsequent operators to lift the movable bottom column 51.

[0029] Among them, two pins 4 are arranged at the bottom of the base 1.

[0030] Although the embodiments of the present invention have been shown and described (see the above detailed description), for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large current monitoring transformer, characterized in that: include A base (1), a frame (2) mounted on the top of the base (1), and a magnetic core (3), wherein a winding 1 (6) and a winding 2 (7) are wound on the inner side of the frame (2); A plurality of blocking and limiting mechanisms (5) are arranged between the base (1) and the magnetic core (3), comprising a movable bottom column (51) movably mounted on the side of the base (1), a movable sleeve (52) rotatably mounted on the top of the movable bottom column (51), and a blocking block (55) fixed to one side of the top end of the movable sleeve (52), wherein the blocking block (55) is pressed against the top surface of the magnetic core (3).

2. A large current monitoring transformer according to claim 1, characterized in that: The blocking and limiting mechanism (5) further comprises a T-shaped side groove (58) provided on the side of the base (1), a spring (59) installed in the T-shaped side groove (58), and a T-shaped side block (510); the T-shaped side block (510) is movably installed in the T-shaped side groove (58) via the spring (59), and one end of the T-shaped side block (510) extends to the side of the base (1) and is fixed to the movable bottom column (51).

3. A large current monitoring transformer according to claim 2, characterized in that: A cylindrical groove is formed on the top surface of the T-shaped side block (510), and the bottom end of the spring (59) is inserted into the cylindrical groove.

4. A large current monitoring transformer according to claim 1, characterized in that: The blocking and limiting mechanism (5) further comprises a limiting block (56) fixed to the bottom surface of the blocking block (55); a limiting groove (57) corresponding to the limiting block (56) is provided on the top surface of the magnetic core (3); and the limiting block (56) is embedded in the limiting groove (57).

5. A large current monitoring transformer according to claim 1, characterized in that: A shaft rod (54) is fixed to the top surface of the movable bottom column (51), and a movable sleeve (52) is rotatably sleeved on the surface of the shaft rod (54).

6. A large current monitoring transformer according to claim 1, characterized in that: The blocking and limiting mechanism (5) further comprises a rubber pad (53) fixed on the surface of the movable bottom column (51), and the top end of the rubber pad (53) extends to the surface of the movable sleeve (52), and the top end surface of the rubber pad (53) is provided with an integrated positioning rubber head (512), and the surface of the movable sleeve (52) is symmetrically provided with two positioning grooves (513) corresponding to the positioning rubber head (512), and the positioning rubber head (512) is embedded in one of the positioning grooves (513).

7. A large current monitoring transformer according to claim 1, characterized in that: A shifting block (511) is fixed on the surface of the movable bottom column (51).

8. A large current monitoring transformer according to claim 1, characterized in that: Two pins (4) are provided at the bottom of the base (1).

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