Pouring type current transformer

Abstract

The utility model belongs to the technical field of current transformers, and particularly relates to a pouring type current transformer which comprises a transformer body, the lower end of the transformer body is connected with a base, the front face of the base is provided with three wiring terminals, the outer side face of the base is connected with a dustproof cover through a connecting structure, and the dustproof cover is provided with a sealing cover. Connecting plates are connected to the two sides of the face, close to the base, of the dust cover, supporting plates are arranged on the left sides and the right sides of the bottom ends of the two connecting plates, the mounting base is provided with limiting grooves allowing the supporting plates to be placed in, limiting structures for limiting the supporting plates are arranged in the limiting grooves, the connecting structures are installed in the dust cover, and the supporting plates are arranged in the limiting grooves. The wiring terminal on the current transformer is protected and is prevented from being exposed outside the environment, so that the temperature of an insulating material is increased, the aging process is accelerated, and the insulating property is reduced.

Description

Technical Field

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

[0002] A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary side winding has very few turns and is connected in series in the circuit where the current needs to be measured.

[0003] Chinese Utility Model Patent CN215118545U discloses a cast 50-hole current transformer, which includes: a transformer, both ends of the transformer are fixedly connected with rotating rods, the outer wall of the rotating rods is rotatably connected with a mounting frame through bearings, and a rotating mechanism is arranged on the right side of the mounting frame. For this cast 50-hole current transformer, the mounting frame and the transformer can be rotated and adjusted or fastened, so as to be applicable to installations in various environments, improve the installation regularity, facilitate subsequent maintenance and repair. When the unilateral stop rod is separated from the round rod on the same side, the round rod on the opposite side can rotate in the semi-cylindrical shell on the opposite side, so that the pressing plate can rotate or be pressed on both sides. Therefore, when wiring the terminal block, the wiring can be pressed and fixed to avoid dislocation and improve the connection stability. Through the insertion connection between the support groove and the sleeve, and the corresponding setting of the transparent plate and the nameplate, the nameplate can be protected from oxidation and dust accumulation, thereby prolonging the life of the nameplate and making it clearer, and avoiding wiring errors.

[0004] However, in the above technical solution, the terminal block is exposed to the environment for a long time, and the coverage of dust may cause the temperature of the insulating material to rise, accelerate the aging process, and reduce its insulation performance. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cast current transformer for the above-mentioned existing technical problems, which achieves the protection of the terminal block on the current transformer, avoids its exposure to the environment, causes the temperature of the insulating material to rise, accelerates the aging process, and reduces its insulation performance.

[0006] In view of this, the utility model provides a cast current transformer, which includes a transformer main body. A base is connected to the lower end of the transformer main body. Three terminal blocks are arranged on the front of the base. It is characterized in that a dust-proof cover is connected to the outer side of the base through a connection structure. Two connecting plates are connected to both sides of the dust-proof cover close to the base. Support plates are arranged on the left and right sides at the bottom of the two connecting plates. It further includes: a mounting seat, a limiting groove for placing the support plate is arranged on the mounting seat, and a limiting structure for limiting the support plate is arranged in the limiting groove. Among them, the connection structure is installed in the dust-proof cover.

[0007] In this technical solution, the dust cover is connected to the base through a connection structure. Two connecting plates are closely attached to the two sides of the base. The four support plates at the bottom ends of the connecting plates are placed into the limit slots of the mounting base. The lower surface of the base contacts the mounting base. Then, a limiting mechanism is used to limit the support plates in the limit slots. When the support plates are limited, the connecting plates are also limited at the same time, so that the dust cover is more firmly installed on the base.

[0008] In the above technical solution, further, the connection structure includes: two partition plates. Arc-shaped blocks are provided on both sides of the two partition plates, and the arc-shaped blocks are in contact connection with the outer wall of the terminal.

[0009] On the side of the partition plate close to the base, there are clamping blocks. Two clamping slots are provided between the three terminals. The dust cover is connected to the mounting base through the clamping connection of the clamping blocks and the clamping slots.

[0010] In this technical solution, under the action of the partition plates and the arc-shaped blocks, the wires connected by the three terminals are blocked, thereby avoiding the phenomenon of short circuit of the three lines and improving the safety of the circuit. The dust cover is clamped on the surface of the base by the clamping connection of the clamping blocks on the two partition plates and the clamping slots.

[0011] In the above technical solution, further, the limiting structure includes: two limiting rods. The two limiting rods are slidably arranged in the limit slots. One end outer wall of the two limiting rods is sleeved with a limiting plate. The other ends of the two limiting rods penetrate through the mounting base and are connected with a moving plate outside the mounting base. A threaded rod is threadedly connected to the moving plate. One end of the threaded rod is movably connected to the mounting base through a bearing, and the other end is connected with a knob.

[0012] In the above technical solution, further, the support plate is provided with limit holes adapted to the two limiting rods.

[0013] In this technical solution, after the support plate is inserted into the limit slot, by rotating the knob, the threaded rod is driven to move towards the mounting base, so that the two limiting rods move towards the support plate, and then the two limiting rods are inserted into the support plate to realize the limitation of the support plate. When the support plate is limited, the connecting plate connected to the support plate is closely attached to the base to further fix the dust cover, avoiding the clamping block falling out of the clamping slot due to the shaking of the dust cover.

[0014] In the above technical solution, further, four mounting blocks are provided on both sides of the mounting base, and mounting holes are machined on the mounting blocks.

[0015] In this technical solution, the staff installs and fixes the main body of the current transformer through the mounting holes on the mounting base at the place where it needs to be installed. And when it is necessary to disassemble the current transformer, only need to turn the knob to disassemble the main body of the transformer. Compared with the existing transformer disassembly, it is more convenient for the staff to disassemble the main body of the transformer by screwing off the bolts with a screwdriver.

[0016] In the above technical solution, further, three wire passing holes corresponding to the wiring terminals are provided on the lower surface of the dust cover.

[0017] In this technical solution, the connecting wires on the wiring terminals extend outwards from the wire passing holes to be connected to the outside.

[0018] The beneficial effects of the present utility model are:

[0019] 1. The dust cover is connected to the base through a connecting structure. The two connecting plates are closely attached to the two sides of the base. The four support plates at the bottom ends of the connecting plates are placed into the limit grooves of the mounting base. The lower surface of the base contacts the mounting base. Then, the support plates in the limit grooves are limited by a limiting mechanism. When the support plates are limited, the connecting plates are also limited at the same time, so that the dust cover is more firmly installed on the base.

[0020] 2. The staff installs and fixes the main body of the current transformer through the mounting holes on the mounting base at the place where it needs to be installed. And when it is necessary to disassemble the current transformer, only need to turn the knob to disassemble the main body of the transformer. Compared with the existing transformer disassembly, it is more convenient for the staff to disassemble the main body of the transformer by screwing off the bolts with a screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a cast current transformer of the present utility model;

[0022] Figure 2 is a schematic structural diagram of a cast current transformer without a dust cover of the present utility model;

[0023] Figure 3 is a schematic structural diagram of a dust cover of a cast current transformer of the present utility model;

[0024] Figure 4 is a cast current transformer of the present utility model Figure 1 The enlarged view of part A;

[0025] The marks in the figure are shown as:

[0026] 1. Main body of current transformer; 2. Base; 3. Dust-proof cover; 4. Mounting seat; 5. Limiting structure; 501. Limiting rod; 502. Limiting plate; 503. Moving plate; 504. Threaded rod; 505. Knob; 6. Mounting block; 7. Mounting hole; 8. Terminal block; 9. Card slot; 10. Connecting plate; 11. Partition board; 12. Arc-shaped block; 13. Clamping block; 14. Support plate; 15. Limiting hole; 16. Wire passing port; 17. Limiting groove. Detailed implementation mode

[0027] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms used here are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0030] It should be noted that in the description of the present application, the orientation or positional relationship indicated by the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] It should be noted that in the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0032] Embodiment 1:

[0033] As Figures 1-4 shown, this embodiment provides a cast current transformer, which includes a transformer main body 1. A base 2 is connected to the lower end of the transformer main body 1. Three wiring terminals 8 are provided on the front of the base 2. A dust-proof cover 3 is connected to the outer side of the base 2 through a connection structure. Two connecting plates 10 are connected to both sides of the dust-proof cover 3 on the side close to the base 2. Support plates 14 are provided on the left and right sides of the bottom ends of the two connecting plates 10. It further includes: a mounting seat 4. A limiting groove 17 for placing the support plate 14 is provided on the mounting seat 4. A limiting structure 5 for limiting the support plate 14 is provided in the limiting groove 17. Among them, the connection structure is installed in the dust-proof cover 3.

[0034] The dust cover 3 is connected to the base 2 through a connection structure. Two connecting plates 10 are closely attached to the two side surfaces of the base 2. The four support plates 14 at the bottom ends of the connecting plates 10 are placed in the limiting grooves 17 of the mounting seat 4. The lower surface of the base 2 contacts the mounting seat 4, and then the support plates 14 in the limiting grooves 17 are limited by a limiting mechanism. When the support plates 14 are limited, the connecting plates 10 are also limited at the same time, so that the dust cover 3 is more firmly installed on the base 2.

[0035] Furthermore, the connection structure includes: two partition plates 11. Arc-shaped blocks 12 are provided on both sides of the two partition plates 11, and the arc-shaped blocks 12 are in contact connection with the outer wall of the terminal 8. A clamping block 13 is provided on the side of the partition plate 11 close to the base 2. Two clamping grooves 9 are provided between the three terminals 8. The dust cover 3 is connected to the mounting seat 4 through the clamping connection of the clamping block 13 and the clamping groove 9.

[0036] Under the action of the partition plates 11 and the arc-shaped blocks 12, the wires connected to the three terminals 8 are blocked, thus avoiding the phenomenon of short circuit of the three lines and improving the safety of the circuit. The dust cover 3 is clamped on the surface of the base 2 by the clamping connection of the clamping blocks 13 on the two partition plates 11 and the clamping grooves 9.

[0037] Furthermore, the limiting structure 5 includes: two limiting rods 501. The two limiting rods 501 are slidably arranged in the limiting grooves 17. A limiting plate 502 is sleeved on the outer wall of one end of the two limiting rods 501. The other ends of the two limiting rods 501 penetrate through the mounting seat 4 and are connected with a moving plate 503 outside the mounting seat 4. A threaded rod 504 is threadedly connected to the moving plate 503. One end of the threaded rod 504 is movably connected to the mounting seat 4 through a bearing, and the other end is connected with a knob 505.

[0038] Furthermore, the support plate 14 is provided with limiting holes 15 adapted to the two limiting rods 501.

[0039] After the support plate 14 is inserted into the limiting groove 17, by rotating the knob 505, the threaded rod 504 is driven to move towards the mounting seat 4, so that the two limiting rods 501 move towards the support plate 14, and then the two limiting rods 501 are inserted into the support plate 14 to realize the limitation of the support plate 14. While limiting the support plate 14, the connecting plate 10 connected to the support plate 14 is closely attached to the base 2 to further fix the dust cover 3 and prevent the clamping block 13 from falling out of the clamping groove 9 due to the shaking of the dust cover 3.

[0040] Further, four mounting blocks 6 are provided on both sides of the mounting base 4, and mounting holes 7 are machined on the mounting blocks 6. The staff installs and fixes the main body 1 of the current transformer at the place where it needs to be installed through the mounting holes 7 on the mounting base 4. And when it is necessary to disassemble the current transformer, only the knob 505 needs to be rotated to disassemble the main body 1 of the transformer. Compared with the existing transformer disassembly, it is more convenient for the staff to disassemble the main body 1 of the transformer by screwing off the bolts with a screwdriver.

[0041] Further, three wire passing openings 16 corresponding to the terminal blocks 8 are provided on the lower surface of the dust cover 3. The connecting wires on the terminal blocks 8 extend outwards from the wire passing openings 16 to be connected to the outside.

[0042] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A cast current transformer, comprising a transformer body (1), wherein the lower end of the transformer body (1) is connected to a base (2), and the front of the base (2) is provided with three wiring terminals (8), characterized in that: The outer side surface of the base (2) is connected to a dust cover (3) via a connecting structure, and the two sides of the dust cover close to the base (2) are connected to connecting plates (10), and support plates (14) are provided on the left and right sides of the bottom ends of the two connecting plates (10). The mounting seat (4) is provided with a limiting groove (17) for the support plate (14) to be placed, and a limiting structure (5) for limiting the support plate (14) is provided in the limiting groove (17), wherein the connecting structure is installed in the dust cover (3).

2. A cast current transformer according to claim 1, characterized in that: The connection structure comprises: two isolation plates (11), arc blocks (12) are provided on both sides of the two isolation plates (11), and the arc blocks (12) are in contact with the outer wall of the connection terminal (8).

3. A cast current transformer according to claim 2, characterized in that: A clamping block (13) is provided on one side of the isolation plate (11) close to the base (2), two clamping slots (9) are provided between the three wiring terminals (8), and the dust cover is connected to the mounting seat (4) through the clamping of the clamping block (13) and the clamping slots (9).

4. A cast current transformer according to claim 3, characterized in that: The limiting structure (5) comprises: two limiting rods (501), the two limiting rods (501) are slidably arranged in the limiting grooves (17), one end of the two limiting rods (501) is sleeved with a limiting plate (502) on the outer wall, the other end of the two limiting rods (501) passes through the mounting seat (4) and is connected to a movable plate (503) outside the mounting seat (4), the movable plate (503) is threadedly connected to a threaded rod (504), one end of the threaded rod (504) is movably connected to the mounting seat (4) through a bearing, and the other end is connected to a knob (505).

5. A cast current transformer according to claim 4, characterized in that: The support plate (14) is provided with limiting holes (15) adapted to the two limiting rods (501).

6. A cast current transformer according to claim 5, wherein four mounting blocks (6) are provided on both sides of the mounting seat (4), and mounting holes (7) are processed on the mounting blocks (6).

7. A cast current transformer according to claim 6, wherein the lower surface of the dust cover (3) is provided with three threading openings (16) corresponding to the wiring terminals (8).

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