Current transformer convenient to install in narrow space

Abstract

The utility model discloses a current transformer convenient to install in a narrow space, relates to the field of current transformers, solves the problem that an existing current transformer is difficult to install in the narrow space, and comprises a shell and an iron core body installed in the shell, an enameled wire is installed on the outer side of the iron core body, and the enameled wire is connected with the shell. A wire holder is fixedly installed on the inner wall of the top of the shell, two leads are welded between the wire holder and the enameled wire, a wire is fixedly installed at one end of the wire holder, a silica gel plate is installed on the front face of the shell, and an observation mirror is fixedly installed on the surface of the silica gel plate. A fixed clamping mechanism for attaching and fixing the electric wire is mounted on the surface of the shell; the sealing mechanism is used for sealing and positioning between the electric wire and the shell, the sealing mechanism is installed inside the shell, and the electric wire is attached to the inner side of the shell through the fixed clamping mechanism, so that the effect of being convenient to install in a narrow space is achieved.

Description

Technical Field

[0001] The utility model relates to the field of current transformers, in particular to a current transformer which is convenient for installation in a narrow space. Background Art

[0002] A current transformer is used to convert large currents in AC circuits into a small current of a certain proportion for measurement and relay protection. It is an instrument that converts large primary currents into small secondary currents for measurement based on the principle of electromagnetic induction. It consists of a closed iron core and a winding. Its primary winding has very few turns and is connected in series in the circuit of the current that needs to be measured.

[0003] When the existing current transformer is connected to the line, the connection of the wires is basically exposed on the outside of the current transformer. When the installation space is relatively narrow, the wires are not convenient to install and organize. During the later maintenance, the wires are difficult to disassemble, which easily causes the problem of wire wear. For this reason, the technical personnel in this field provide a current transformer that is easy to install in a small space to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a current transformer which is convenient for installation in a narrow space and can solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a current transformer that is easy to install in a small space, comprising a shell and an iron core body installed inside the shell, the iron core body being fixed and welded in the shell at a right angle, an enameled wire being installed on the outside of the iron core body, the enameled wire being installed in two groups on the surface of the iron core body, a terminal block being fixedly installed on the top inner wall of the shell, the terminal block being fixedly installed on the inner wall of the shell through a fastener, two leads being welded between the terminal block and the enameled wire, one end of the terminal block extending to the outside of the shell, an electric wire being fixedly installed on the end of the terminal block away from the lead, a connector being fixedly connected to the end of the electric wire away from the terminal block, a silicone plate being installed on the front of the shell, an observation mirror being fixedly installed on the surface of the silicone plate, and a clamping mechanism for attaching and fixing the electric wire on the surface of the shell; a sealing mechanism for sealing and positioning the electric wire and the shell, the sealing mechanism being installed inside the shell.

[0006] Preferably, the fixing clamp mechanism includes a mounting hole 1 opened at the top of the shell, the inner wall of the mounting hole 1 is fixedly connected with a positioning clamp 1, the surface of the silicone plate is opened with a mounting hole 2, the inner wall of the mounting hole 2 is fixedly connected with a positioning clamp 2, the top of the positioning clamp 2 contacts the top inner wall of the shell, the positioning clamp 2 and the positioning clamp 1 are on a vertical line, and one side of the positioning clamp 1 and the positioning clamp 2 are each provided with two card slots for the electric wire to be limitedly engaged, and the card slots extend to the outside of the positioning clamp 1 and the positioning clamp 2, the lengths of the mounting hole 1 and the mounting hole 2 are respectively greater than the lengths of the positioning clamp 1 and the positioning clamp 2, and the widths of the mounting hole 1 and the mounting hole 2 are both greater than the width of the joint, and the outer side of the electric wire is buckled by the positioning clamp 1 and the positioning clamp 2, so that the electric wire is attached to the inner side of the shell and extends to the outside of the silicone plate, which has the effect of facilitating installation and arrangement.

[0007] Preferably, the sealing mechanism includes an installation cavity opened on the inner side of the installation hole one, the inner wall of the installation cavity is provided with a sliding plate for limiting sliding, two springs are fixedly connected between the sliding plate and the inner wall of the installation cavity, and a side of the sliding plate away from the spring is fixedly connected with a card plate one extending into the installation hole one, the width of the card plate one is the same as the width of the installation hole one, the bottom of the card plate one is in contact with the positioning clip one, and a card plate two is fixedly installed on the inner wall of the installation hole two, the width of the card plate two is the same as the width of the installation hole two, and the card plate two is in contact with the surface of the positioning clip two, and the card plate one and the card plate two are both provided with a semicircular opening corresponding to the card slot, and the outer side of the electric wire is buckled by the card plate one and the card plate two, and used in combination with the positioning clip one and the positioning clip two, the opening of the outer shell and the silicone plate is sealed, thereby achieving the effect of preventing dust from falling.

[0008] Preferably, the openings of the first positioning clip and the second positioning clip are both arc-shaped structures, and the first positioning clip and the second positioning clip are made of elastic plastic material, so that the first positioning clip and the second positioning clip can easily buckle the wires.

[0009] Preferably, a pull block is fixedly connected to the top of the clamping plate 1, and the pull block is an arc-shaped structure, and the clamping plate 1 can be pulled into the installation cavity by the pull block, which is easy to operate.

[0010] Preferably, two slide bars that slide through the slide plate are fixedly connected to the inner wall of the installation cavity, and the two slide bars are respectively located in the inner circles of the two springs to improve the stability of the movement of the slide plate.

[0011] Preferably, two inserting strips are fixedly connected to a side of the second card plate close to the second positioning clamp, and the two inserting strips are respectively inserted into the openings of the second positioning clamp, so that the second card plate is buckled in the opening of the second positioning clamp, for fixing the second card plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model uses a clamping mechanism to extend the wires through the first and second mounting holes to the outside of the silicone plate, which is convenient for the joint with the external socket, and is fixed by the first and second positioning clips so that the wires are attached to the inner side of the shell, thereby achieving the effect of facilitating installation in a narrow space.

[0014] 2. The utility model uses a sealing mechanism. After the wire is attached to the inside of the shell, the first and second clamps are pressed against the outside of the wire to clamp it again, and the first and second mounting holes are sealed to prevent dust from entering the shell, thereby achieving a sealed and dust-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the joint and the core body in the utility model.

[0017] Figure 3 It is a schematic diagram of the positioning clamp and the wire structure in the utility model.

[0018] Figure 4 It is a schematic diagram of the structure of a clamping plate and a pull block in the utility model.

[0019] Figure 5 It is a schematic diagram of the structure of the second positioning clip and the inserting strip in the utility model.

[0020] In the figure: 1. shell; 2. core body; 3. clamping mechanism; 301. mounting hole 1; 302. positioning clamp 1; 303. mounting hole 2; 304. positioning clamp 2; 4. sealing mechanism; 401. mounting cavity; 402. slide plate; 403. spring; 404. clamping plate 1; 405. clamping plate 2; 5. enameled wire; 6. terminal block; 7. lead wire; 8. electric wire; 9. silicone plate; 10. observation mirror; 11. connector; 12. pull block; 13. slide rod; 14. insert. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] See also Figure 1 and Figure 2 , a current transformer that is easy to install in a small space as shown in the figure, includes a shell 1 and an iron core body 2 installed inside the shell 1, the iron core body 2 is fixed and welded in the shell 1 at a right angle, an enameled wire 5 is installed on the outside of the iron core body 2, and the enameled wire 5 is installed in two groups on the surface of the iron core body 2, a terminal block 6 is fixedly installed on the top inner wall of the shell 1, the terminal block 6 is fixedly installed on the inner wall of the shell 1 through a fastener, two lead wires 7 are welded between the terminal block 6 and the enameled wire 5, one end of the terminal block 6 extends to the outside of the shell 1, and an electric wire 8 is fixedly installed on the end of the terminal block 6 away from the lead wire 7, and a connector 11 is fixedly connected to the end of the electric wire 8 away from the terminal block 6, a silicone plate 9 is installed on the front of the shell 1, an observation mirror 10 is fixedly installed on the surface of the silicone plate 9, and a clamping mechanism 3 for attaching and fixing the electric wire 8 is installed on the surface of the shell 1; a sealing mechanism 4 is used to seal and position the electric wire 8 and the shell 1, and the sealing mechanism 4 is installed inside the shell 1.

[0024] See also Figure 3 In the figure, the clamping mechanism 3 includes a mounting hole 1 301 opened at the top of the housing 1, the inner wall of the mounting hole 1 301 is fixedly connected with a positioning clamp 1 302, the surface of the silicone plate 9 is provided with a mounting hole 2 303, the inner wall of the mounting hole 2 303 is fixedly connected with a positioning clamp 2 304, the top of the positioning clamp 2 304 is in contact with the top inner wall of the housing 1, the positioning clamp 2 304 and the positioning clamp 1 302 are on a vertical line, and one side of the positioning clamp 1 302 and the positioning clamp 2 304 are both provided with a card slot for limiting the connection of two power supply lines 8, and the card slot extends to the outer side of the positioning clamp 1 302 and the positioning clamp 2 304, the lengths of the mounting hole 1 301 and the mounting hole 2 303 are respectively greater than the lengths of the positioning clamp 1 302 and the positioning clamp 2 304, and the widths of the mounting hole 1 301 and the mounting hole 2 303 are both greater than the width of the connector 11;

[0025] The user buckles the wire 8 into the slot of the positioning clip 1 302 through the installation hole 1 301, and fixes the wire 8 into the slot of the positioning clip 2 304 through the installation hole 2 303, so that the wire 8 can be attached to the inner side of the housing 1 and extend to the outer side of the silicone plate 9, which makes installation and arrangement easier.

[0026] See also Figure 3 , Figure 4 and Figure 5In the figure, the sealing mechanism 4 includes a mounting cavity 401 opened inside the mounting hole 1 301, and a slide plate 402 is provided on the inner wall of the mounting cavity 401 for limiting sliding. Two springs 403 are fixedly connected between the slide plate 402 and the inner wall of the mounting cavity 401, and a card plate 1 404 extending into the mounting hole 1 301 is fixedly connected to the side of the slide plate 402 away from the spring 403. The width of the card plate 1 404 is the same as the width of the mounting hole 1 301, and the bottom of the card plate 1 404 is in contact with the positioning clip 1 302. A card plate 2 405 is fixedly installed on the inner wall of the mounting hole 2 303, and the width of the card plate 2 405 is the same as the width of the mounting hole 2 303. The card plate 2 405 is in contact with the surface of the positioning clip 2 304, and the card plate 1 404 and the card plate 2 405 are both provided with semicircular openings corresponding to the card slots, so that the card plate 1 404 and the card plate 2 405 can be pressed against the outer side of the wire 8;

[0027] The spring 403 pushes the slide plate 402 to move along the inner wall of the installation cavity 401, pushing the clamp plate 1 404 to buckle the outer side of the wire 8, and the clamp plate 2 405 rotates along the inner wall of the installation hole 2 303 and presses against the outer side of the wire 8, so that the clamp plate 1 404 and the clamp plate 2 405 respectively seal the installation hole 1 301 and the installation hole 2 303, thereby preventing dust from falling.

[0028] Working principle for easy installation in a narrow space: first, the user pushes the card plate 404 into the installation cavity 401, and buckles the wire 8 into the slot of the positioning clip 302 through the installation hole 301. Then, the user releases the card plate 404, and the spring 403 pushes the card plate 404 against the outside of the wire 8 through the slide plate 402 to seal the installation hole 301. Then, the user pushes the connector 11 against the surface of the card plate 2 405, and fixes the wire 8 in the slot of the positioning clip 2 304 through the installation hole 2 303, so that the wire 8 can be attached to the inner side of the shell 1 and extend to the outer side of the silicone plate 9, and the card plate 2 405 is pressed against the outer side of the wire 8, so that the wire 8 can be attached to the inner side of the shell 1 and extend to the outer side of the silicone plate 9, which is convenient for the arrangement of the wire 8, so that the mutual inductor can be installed in a narrow space, thereby achieving the effect of easy installation.

[0029] Embodiment 2

[0030] See also Figure 3 , Figure 4 and Figure 5The present embodiment further illustrates the first embodiment. In the figure, the openings of the positioning clip 1 302 and the positioning clip 2 304 are both arc-shaped structures. The positioning clip 1 302 and the positioning clip 2 304 are made of elastic plastic material, which is convenient for the positioning clip 1 302 and the positioning clip 2 304 to buckle the wire 8. The top of the clamping plate 1 404 is fixedly connected with a pull block 12. The pull block 12 is an arc-shaped structure. The clamping plate 1 404 can be pulled into the installation cavity 401 by the pull block 12 for easy operation.

[0031] In this embodiment, the user can pull the pull block 12 to put the card plate 1 404 into the installation cavity 401, so that the connector 11 can be inserted into the installation hole 1 301, and the connector 11 can resist and push the card plate 2 405 to open the card plate 2 405, thereby improving the convenience of the user during installation.

[0032] Embodiment 3

[0033] See also Figure 2 and Figure 3 This embodiment further illustrates other embodiments. In the figure, the inner wall of the mounting cavity 401 is fixedly connected with two slide bars 13 that slide through the slide plate 402. The two slide bars 13 are respectively located in the inner circles of the two springs 403, and are used to improve the stability of the movement of the slide plate 402. The second card plate 405 is fixedly connected to one side close to the second positioning clamp 304 with two insertion strips 14. The two insertion strips 14 are respectively inserted into the openings of the second positioning clamp 304, so that the second card plate 405 is buckled at the opening of the second positioning clamp 304, and is used to fix the second card plate 405.

[0034] In this embodiment: its purpose is to improve the stability of the movement of the slide plate 402 through the two slide bars 13 when the elastic force of the spring 403 pushes the slide plate 402 to move, and after the installation of the wire 8 is completed, the rotating card plate 405 is rotated to insert the two insertion strips 14 into the opening of the positioning clip 2 304, thereby improving the convenience of installing the card plate 1 404 and the card plate 2 405.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or fixed folder from another entity or fixed folder, and do not necessarily require or imply any such actual relationship or order between these entities or fixed folders. Moreover, the terms "include"-"comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer that is easy to install in a narrow space, comprising a housing (1) and an iron core body (2) installed inside the housing (1), characterized in that: An enameled wire (5) is installed on the outer side of the core body (2), a wiring seat (6) is fixedly installed on the top inner wall of the shell (1), two lead wires (7) are welded between the wiring seat (6) and the enameled wire (5), one end of the wiring seat (6) extends to the outer side of the shell (1), an electric wire (8) is fixedly installed on the end of the wiring seat (6) away from the lead wire (7), and a connector (11) is fixedly connected to the end of the electric wire (8) away from the wiring seat (6), a silicone plate (9) is installed on the front side of the shell (1), an observation mirror (10) is fixedly installed on the surface of the silicone plate (9), and a clamping mechanism (3) for attaching and fixing the electric wire (8) is installed on the surface of the shell (1); A sealing mechanism (4) is used for sealing and positioning the electric wire (8) and the housing (1); the sealing mechanism (4) is installed inside the housing (1).

2. A current transformer that is easy to install in a narrow space according to claim 1, characterized in that: The fixing clamp mechanism (3) comprises a mounting hole (301) formed at the top of the housing (1), a positioning clamp (302) being fixedly connected to the inner wall of the mounting hole (301), a mounting hole (303) being formed on the surface of the silicone plate (9), a positioning clamp (304) being fixedly connected to the inner wall of the mounting hole (303), the positioning clamp (304) being on a vertical line with the positioning clamp (302), two slots for limiting the position of the electric wire (8) being formed on one side of the positioning clamp (302) and the positioning clamp (304), the lengths of the mounting hole (301) and the mounting hole (303) being respectively greater than the lengths of the positioning clamp (302) and the positioning clamp (304), and the widths of the mounting hole (301) and the mounting hole (303) being greater than the width of the connector (11).

3. A current transformer that is easy to install in a narrow space according to claim 2, characterized in that: The sealing mechanism (4) comprises an installation cavity (401) opened on the inner side of the installation hole (301); a slide plate (402) is provided on the inner wall of the installation cavity (401) for limiting sliding; two springs (403) are fixedly connected between the slide plate (402) and the inner wall of the installation cavity (401); a clamping plate (404) extending into the installation hole (301) is fixedly connected to a side of the slide plate (402) away from the springs (403); the bottom of the clamping plate (404) is in contact with the positioning clamp (302); a clamping plate (405) is fixedly installed on the inner wall of the installation hole (303); the clamping plate (405) is in contact with the surface of the positioning clamp (304); and both the clamping plate (404) and the clamping plate (405) are provided with semicircular openings corresponding to the clamping groove.

4. A current transformer that is easy to install in a narrow space according to claim 2, characterized in that: The openings of the first positioning clip (302) and the second positioning clip (304) are both arc-shaped structures, and the first positioning clip (302) and the second positioning clip (304) are made of elastic plastic material.

5. A current transformer that is easy to install in a narrow space according to claim 3, characterized in that: A pull block (12) is fixedly connected to the top of the first clamping plate (404), and the pull block (12) is an arc-shaped structure.

6. A current transformer that is easy to install in a narrow space according to claim 3, characterized in that: Two slide bars (13) that slide through the slide plate (402) are fixedly connected to the inner wall of the installation cavity (401), and the two slide bars (13) are respectively located in the inner circles of the two springs (403).

7. A current transformer that is easy to install in a narrow space according to claim 3, characterized in that: Two inserting strips (14) are fixedly connected to a surface of the second clamping plate (405) close to the second positioning clamp (304), and the two inserting strips (14) are respectively inserted into the openings of the second positioning clamp (304).

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