An indoor flexible current transformer and its fastening structure

Abstract

This utility model discloses an indoor flexible current transformer and its fastening structure, including a flat iron core, a cladding layer, terminals, and a fastening structure. The flat iron core has a fixed end and a movable end not covered by the cladding layer at both ends. The fixed end of the flat iron core is disposed within the fastening structure, and the movable end is movably inserted into the fastening structure. The fixed and movable ends of the flat iron core are fitted together vertically within the fastening structure. The fastening structure includes an upper cover, a lower cover, a cover fastening assembly, and a clamping assembly. The upper and lower covers are interlocked, the cover fastening assembly is installed on the upper and lower covers, and the clamping assembly penetrates the upper cover and fits tightly against the movable end of the flat iron core. The fastening structure firmly fixes the flat iron core to the fastening structure, and the upper and lower covers, under the action of the cover fastening assembly and the clamping assembly, ensure a tight fit between the fixed and movable ends of the flat iron core, thereby improving measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of power measurement technology, and in particular to an indoor flexible current transformer and its fastening structure. Background Technology

[0002] Flexible instrument transformers are widely used in indoor power measurement due to their ease of installation and wide measurement range. However, existing flexible instrument transformers have the following problems:

[0003] 1. Insufficient core tightness: The flexible coil must fit tightly against the core, otherwise the measurement accuracy will be affected.

[0004] 2. Joints are prone to cracking: Ordinary fixing methods result in uneven stress on the joints, which can easily lead to damage during long-term use or under vibration, affecting the stability and lifespan of the current transformer.

[0005] 3. It cannot be fixed on the conductor to be measured during measurement, which causes positional movement and affects measurement accuracy. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an indoor flexible current transformer and its fastening structure, thereby solving problems such as easy cracking of the joint and insufficient core tightness.

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] An indoor flexible current transformer and its fastening structure include a flat iron core, a covering layer, terminals, and a fastening structure. The covering layer consists of a coil winding uniformly wound on the flat iron core and a silicone insulating layer covering the outer layer. The terminals are connected to the two ends of the coil winding inside the covering layer. The two ends of the flat iron core are a fixed end and a movable end not covered by the covering layer. The fixed end of the flat iron core is disposed within the fastening structure, and the movable end is movably inserted into the fastening structure. The fixed end and the movable end of the flat iron core are fitted together vertically within the fastening structure.

[0009] Furthermore, the fastening structure includes an upper cover, a lower cover, a cover fastening assembly, and a pressing assembly. The upper cover and the lower cover are interlocked, the cover fastening assembly is installed on the upper cover and the lower cover, and the pressing assembly passes through the upper cover and fits tightly against the movable end of the flat iron core.

[0010] Furthermore, multiple protrusions are provided between the contact surfaces of the upper and lower covers and the cladding layer near the fixed end of the flat iron core. These protrusions continuously press into the cladding layer during the tightening process of the upper and lower covers, thereby ensuring that the fixed end of the flat iron core does not loosen between the upper and lower covers during use.

[0011] Preferably, the cover fastening assembly consists of multiple fastening bolts symmetrically distributed on both sides of the fastening structure. These bolts penetrate the upper cover and match the fastening threaded holes in the lower cover. Using multiple symmetrically distributed fastening bolts provides more uniform pressure, thereby improving the sealing performance of the transformer. Six fastening bolts are preferred.

[0012] Optionally, the clamping assembly is at least one clamping bolt, which matches the clamping threaded hole provided on the upper cover, and the clamping threaded hole penetrates the upper cover.

[0013] Optionally, the end of the clamping bolt is provided with anti-slip grooves. The anti-slip grooves can provide greater friction when tightening the clamping bolt, making the clamping bolt tighter, and allowing the fixed end and movable end of the flat iron core to fit closely together.

[0014] Furthermore, the lower cover has through holes on both sides, the through holes being horizontal and perpendicular to the direction in which the conductor to be tested passes through. Cable ties can be inserted into the through holes to fix the current transformer to the conductor to be tested, preventing displacement during measurement and thus avoiding measurement errors.

[0015] The advantages and beneficial effects of this utility model are as follows:

[0016] 1. The upper and lower covers are secured to the flat iron core by multiple cover fastening components and protrusions, which can effectively fix the flat iron core inside the upper and lower covers, making it less prone to damage during long-term use or under vibration.

[0017] 2. The fixed and movable ends of the flat iron core can fit tightly together under the action of the clamping assembly, which improves the measurement accuracy.

[0018] 3. Cable ties can be inserted into the through hole to fix the current transformer to the wire to be measured, preventing it from shifting during measurement and reducing measurement errors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the current transformer of this utility model when it is closed;

[0020] Figure 2 This is a schematic diagram of the current transformer of this utility model during operation;

[0021] Figure 3 This is a schematic diagram of the current transformer of this utility model when it is opened;

[0022] Figure 4 This is an exploded view of the current transformer of this utility model;

[0023] Figure 5 This is an exploded view of the fastening structure of this utility model;

[0024] Figure 6 This is a cross-sectional view of the fastening structure of this utility model.

[0025] In the diagram: 1. Flat iron core; 11. Fixed end; 12. Movable end; 2. Covering layer; 3. Wiring terminal; 4. Fastening structure; 41. Top cover; 42. Bottom cover; 43. Cover fastening assembly; 431. Fastening bolt; 432. Fastening threaded hole; 44. Clamping assembly; 441. Clamping bolt; 442. Clamping threaded hole; 443. Anti-slip texture; 45. Protrusion; 46. Through hole. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0027] like Figure 1-6 As shown, this utility model provides an indoor flexible current transformer and its fastening structure, including a flat iron core 1, a covering layer 2, a terminal block 3, and a fastening structure 4. The covering layer 2 is a coil winding uniformly wound on the flat iron core 1 and a silicone insulating layer covering the outer layer. The terminal block 3 is connected to the two ends of the coil winding inside the covering layer 2. The two ends of the flat iron core 1 are a fixed end 11 and a movable end 12 not covered by the covering layer 2. The fixed end 11 of the flat iron core 1 is set in the fastening structure 4, and the movable end 12 is movably inserted into the fastening structure 4. The fixed end 11 and the movable end 12 of the flat iron core 1 are attached vertically inside the fastening structure 4.

[0028] The fastening structure 4 includes an upper cover 41, a lower cover 42, a cover fastening assembly 43, and a pressing assembly 44. The upper cover 41 and the lower cover 42 are fastened together. The cover fastening assembly 43 is installed on the upper cover 41 and the lower cover 42. The pressing assembly 44 passes through the upper cover 41 and is tightly fitted to the movable end 12 of the flat iron core 1.

[0029] Multiple protrusions 45 are provided between the contact surfaces of the upper cover 41 and the lower cover 42 and the covering layer 2 near the fixed end 11 of the flat iron core 1.

[0030] The cover fastening assembly 43 consists of multiple fastening bolts 431 symmetrically distributed on both sides of the fastening structure 4. The fastening bolts 431 penetrate the upper cover 41 and match the fastening threaded holes 432 provided on the lower cover 42. Preferably, there are 6 fastening bolts 431.

[0031] The clamping assembly 44 is at least one clamping bolt 441, which matches the clamping threaded hole 442 provided on the upper cover 41, and the clamping threaded hole 442 penetrates the upper cover 41.

[0032] The end of the clamping bolt 441 is provided with anti-slip texture 443.

[0033] The lower cover 42 has through holes 46 on both sides. The through holes 46 are horizontal and perpendicular to the direction in which the wire to be tested passes through.

[0034] The specific process is as follows: Before use, place the fixed end 11 of the flat iron core 1 into the lower cover 42, so that the covering layer 2 near the fixed end 11 of the flat iron core 1 contacts the multiple protrusions 45 on the lower cover 42. Then, fasten the upper cover 41, and use the fastening bolt 431 to pass through the upper cover 41 and screw it into the fastening thread hole 432 of the lower cover 42, and ensure that it is tightened. When using, pass the movable end 12 of the flat iron core 1 around the wire to be tested and pass it into the fastening structure 4 composed of the upper cover 41 and the lower cover 42. At this time, the fixed end 11 and the movable end 12 of the flat iron core 1 are attached to each other in the fastening structure 4. Then, screw the clamping bolt 441 into the clamping thread hole 442 of the upper cover 41 and continue to tighten it downwards until it can no longer be tightened. At this time, the fixed end 11 and the movable end 12 of the flat iron core 1 are tightly attached under the action of the clamping bolt 441. When fixing, insert one end of the cable tie into the through holes 46 on both sides of the lower cover 42, then wrap it around the wire to be tested, and tie both ends of the cable tie tightly.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An indoor flexible current transformer and its fastening structure, comprising a flat iron core (1), a covering layer (2), terminals (3), and a fastening structure (4), wherein the covering layer (2) is a coil winding uniformly wound on the flat iron core (1) and a silicone insulating layer covering the outer layer, and the terminals (3) are connected to the two ends of the coil winding inside the covering layer (2), characterized in that, The flat iron core (1) has a fixed end (11) and a movable end (12) at both ends that are not covered by the covering layer (2). The fixed end (11) of the flat iron core (1) is set in the fastening structure (4), and the movable end (12) is movably inserted into the fastening structure (4). The fixed end (11) and the movable end (12) of the flat iron core (1) are attached to each other inside the fastening structure (4).

2. An indoor flexible mutual inductor and its fastening structure according to claim 1, characterized in that, The fastening structure (4) includes an upper cover (41), a lower cover (42), a cover fastening assembly (43), and a pressing assembly (44). The upper cover (41) and the lower cover (42) are fastened together. The cover fastening assembly (43) is installed on the upper cover (41) and the lower cover (42). The pressing assembly (44) passes through the upper cover (41) and is tightly fitted to the movable end (12) of the flat iron core (1).

3. The indoor flexible mutual inductor and its fastening structure according to claim 2, characterized in that, Multiple protrusions (45) are provided between the contact surfaces of the upper cover (41) and the lower cover (42) and the covering layer (2) near the fixed end (11) of the flat iron core (1).

4. The indoor flexible mutual inductor and its fastening structure according to claim 2, characterized in that, The cover fastening assembly (43) consists of multiple fastening bolts (431) symmetrically distributed on both sides of the fastening structure (4). The fastening bolts (431) penetrate the upper cover (41) and match the fastening threaded holes (432) provided on the lower cover (42).

5. The indoor flexible mutual inductor and its fastening structure according to claim 2, characterized in that, The clamping assembly (44) is at least one clamping bolt (441), which matches the clamping threaded hole (442) provided on the upper cover (41), and the clamping threaded hole (442) penetrates the upper cover (41).

6. An indoor flexible mutual inductor and its fastening structure according to claim 5, characterized in that, The end of the clamping bolt (441) is provided with anti-slip texture (443).

7. The indoor flexible mutual inductor and its fastening structure according to claim 2, characterized in that, The lower cover (42) has through holes (46) on both sides. The through holes (46) are horizontal and perpendicular to the direction in which the wire to be tested passes through.

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