Dustproof current transformer
By using a concave-convex annular plug connecting the faceplate and the bottom box in the current transformer, and by installing a removable dust cover at the junction, the problem of poor dust protection of the current transformer is solved, achieving good dust protection and conductivity.
Patent Information
- Application Number
- CN202520269336.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Gaps easily form at the connection points of the existing current transformer housing, allowing dust to enter, and the joints lack dust protection, affecting conductivity.
The ring-shaped plug with a concave-convex structure connects the front cover and the bottom box to increase the sealing performance, and a removable dust cover is installed at the power socket to prevent dust from contacting it.
It effectively prevents dust from entering the current transformer, improves the dustproof effect, protects the connecting parts from dust, and maintains the conductivity.
Smart Images
Figure CN223692960U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to current transformer technical field, concretely is a dustproof current transformer. BACKGROUND
[0002] Current transformer is a kind of power sensor that works according to electromagnetic induction principle, mainly used to convert the large current of primary side into small current of secondary side, to facilitate measurement, protection and control. Current transformer is widely used in power system, industrial automation, transportation and building and environmental control fields.
[0003] However, the shell of the current transformer is usually assembled and connected by bottom box and cover plate at present, the contact surface of cover plate and bottom box is usually plane, the shell of this structure is prone to form gap at the connecting place of bottom box and cover plate, so that the dust outside is easy to directly enter the inside of current transformer through the gap. In addition, since the current transformer is usually provided with electrically conductive connector outside, the current transformer is lack of dust protection when not being used, and is easy to be dusted in long-term exposure to air. UTILITY MODEL CONTENTS
[0004] In order to overcome the deficiencies of prior art, the utility model provides a dustproof current transformer, which can effectively solve the technical problem of poor dustproof effect of current transformer.
[0005] The utility model solves the technical problems by adopting the technical scheme of:
[0006] A dustproof current transformer, comprising a shell, an iron core, a primary coil and a secondary coil, the iron core is installed in the shell, the primary coil and the secondary coil are wound on the iron core, the shell comprises a bottom box and a cover, the cover is detachably installed on the top of the bottom box, the top of the bottom box is provided with a downwardly recessed groove, a first annular insertion slot and a second annular insertion slot, the first annular insertion slot is distributed on the periphery of the groove, the second annular insertion slot is distributed on the periphery of the first annular insertion slot, the bottom of the cover is connected with a first annular insertion block inserted into the first annular insertion slot and a second annular insertion block inserted into the second annular insertion slot, the top of the cover is provided with four upwardly protruding power connection seats, the power connection seats are installed with two first power connection pieces and two second power connection pieces, the first power connection pieces are connected with both ends of the primary coil, the second power connection pieces are connected with both ends of the secondary coil, the power connection seats are further detachably installed with dust covers for covering the first power connection pieces / second power connection pieces.
[0007] Further, the shell is provided with a first fixing block and a second fixing block for clamping the iron core, and the first fixing block and the second fixing block are connected with a insertion rod passing through the middle part of the iron core for fixing the iron core.
[0008] Further, the first fixed block is integrally connected with the bottom of the groove, the first fixed block is provided with a first insertion slot for inserting the insertion rod, and the second fixed block is integrally connected with the bottom of the cover, and the second fixed block is provided with a second insertion slot for inserting the insertion rod.
[0009] Further, the primary coil is wound at one end of the iron core, the secondary coil is wound at the other end of the iron core away from the primary coil, and the number of turns of the primary coil is greater than that of the secondary coil.
[0010] Further, the power connection seat is provided with external threads on the outer side for mounting a dust cover, and the inner wall of the dust cover is provided with internal threads matched with the external threads.
[0011] Further, the shell is connected with a mounting seat for mounting, and the mounting seat is provided with a mounting hole.
[0012] Compared with the prior art, the current transformer has the advantages that:
[0013] When the cover and the bottom box are connected, the two annular insertion blocks distributed on the periphery of the groove are connected, and the two annular insertion blocks form a concave-convex structure after being connected, so that the path of dust entering the groove is prolonged, and meanwhile, after the protective cover is connected with the power connection seat, the contact between dust and the power connection part is prevented, and good dustproof effect is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a schematic view of the overall structure of the embodiment of the utility model;
[0015] Figure 2 It is a schematic view of the connection structure of the bottom box and the iron core of the embodiment of the utility model;
[0016] Figure 3 It is a schematic view of the internal structure of the bottom box of the embodiment of the utility model;
[0017] Figure 4 It is the embodiment of the utility model Figure 3 It is an enlarged schematic view of the structure of part A of the embodiment of the utility model;
[0018] Figure 5 It is a schematic view of the bottom structure of the cover of the embodiment of the utility model;
[0019] Figure 6 It is the embodiment of the utility model Figure 5 It is an enlarged schematic view of the structure of part B of the embodiment of the utility model;
[0020] Figure 7 It is a schematic view of the dust cover structure of the embodiment of the utility model;
[0021] Mark in the figure:
[0022] 1-Housing, 2-Iron core, 3-Primary coil, 4-Secondary coil, 5-Groove, 6-First annular slot, 7-Second annular slot, 8-First annular insert, 9-Second annular insert, 10-Electrical connector, 11-First electrical connector, 12-Second electrical connector, 13-Dust cover, 14-First fixing block, 15-Second fixing block, 16-Insertion rod, 17-First slot, 18-Second slot, 19-External thread, 20-Internal thread, 21-Mounting base, 22-Mounting hole;
[0023] 101 - Base box, 102 - Top cover. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] like Figures 1-7 As shown, this utility model provides a dustproof current transformer, mainly used to improve the dustproof effect at the splicing points of the current transformer housing and exposed electrical components. The structure of the current transformer mainly includes a housing 1, an iron core 2, a primary coil 3, and a secondary coil 4. The iron core 2 is installed inside the housing 1, and both the primary coil 3 and the secondary coil 4 are wound on the iron core 2, converting the high-voltage current flowing into the primary coil 3 into a low-voltage current flowing out of the secondary coil 4.
[0026] The housing 1 of the current transformer comprises a base box 101 and a cover 102. During assembly, the cover 102 is detachably installed on the top of the base box 101. After the cover 102 is opened, a downwardly recessed groove 5 is formed on the top of the base box 101, and the iron core 2, primary coil 3, and secondary coil 4 are all installed in the groove 5. To improve the sealing performance when the cover 102 is connected to the base box 101, a first annular slot 6 and a second annular slot 7 are formed on the top of the base box 101. The first annular slot 6 is located around the groove 5, and the second annular slot 7 is located around the first annular slot 6. Correspondingly, a first annular insert 8 inserted into the first annular slot 6 and a second annular insert 9 inserted into the second annular slot 7 are connected to the bottom of the cover 102. When the cover 102 is connected to the base box 101, a double-insertion fixing structure is formed on the periphery of the groove 5, and this structure forms a repeatedly concave-convex surface, effectively preventing dust from entering the groove 5 and improving the dustproof effect.
[0027] When assembling the iron core 2, the first fixing block 14 and the second fixing block 15 for clamping the iron core 2 are arranged in the shell 1 and clamped on both sides of the iron core 2. In order to further limit the movement of the iron core 2, the plug rod 16 passing through the middle part of the iron core 2 is additionally arranged between the first fixing block 14 and the second fixing block 15, which is mainly used for fixing the position of the iron core 2. When the plug rod 16 is inserted into the middle part of the iron core 2, it is tightly attached to the inner wall of the iron core 2.
[0028] In order to further fix the position of the plug rod 16, the first fixing block 14 is integrally connected to the bottom of the groove 5, and the second fixing block 15 is integrally connected to the bottom of the face cover 102. The first fixing block 14, the second fixing block 15 and the plug rod 16 are connected and can be detached. In addition, the first fixing block 14 is provided with the first insertion slot 17 for inserting the plug rod 16 at one end close to the plug rod 16, and the second fixing block 15 is provided with the second insertion slot 18 for inserting the plug rod 16 at one end close to the plug rod 16. At this time, the first fixing block 14 and the second fixing block 15 are only clamped at the middle position of the iron core 2, and the two ends of the iron core 2 are in a suspended state to facilitate the winding of the primary coil 3 and the secondary coil 4.
[0029] The primary coil 3 is wound at one end of the iron core 2, and the secondary coil 4 is wound at the end of the iron core 2 away from the primary coil 3. When winding, the number of turns of the primary coil 3 is greater than that of the secondary coil 4, so as to form the effect of converting high-voltage current input from the primary coil 3 into low-voltage current output from the secondary coil 4.
[0030] In order to facilitate the connection with the primary coil 3 and the secondary coil 4, four upwardly protruding power connection seats 10 are arranged on the top of the face cover 102, and two first power connection pieces 11 and two second power connection pieces 12 are installed in the power connection seats 10. The first power connection pieces 11 are connected with the two ends of the primary coil 3, and the second power connection pieces 12 are connected with the two ends of the secondary coil 4.
[0031] If the current transformer is not used, the dust cover 13 for covering the first power connection piece 11 / second power connection piece 12 can be detachably installed on the power connection seat 10, which is mainly used for protecting the power connection pieces from dust to avoid affecting the conductivity. The dust cover 13 is connected or detached by rotating, and the specific structure is that the outer thread 19 for installing the dust cover 13 is arranged on the outer side of the power connection seat 10, and the inner thread 20 matched with the outer thread 19 is arranged on the inner wall of the dust cover 13. At this time, the user can rotate the dust cover 13 to fix it by matching the outer thread 19 and the inner thread 20, so as to strengthen the dust protection of the first power connection piece 11 and the second power connection piece 12.
[0032] In addition, the mounting seat 21 for installation is further connected to the bottom of the bottom box 101 of the shell 1, the mounting seat 21 is provided with the mounting hole 22, after the current transformer is supported in the fixed position through the mounting seat 21, the user can drive the screw into the mounting hole 22 to fix the current transformer.
[0033] Compared with the prior art, when the face cover 102 is connected with the bottom box 101, the current transformer provided by the technical scheme is connected through two annular plug blocks distributed on the periphery of the groove 5, the two annular plug blocks are connected to form a reverse concave-convex structure, the path of dust entering the groove 5 is prolonged, meanwhile, after the protective cover 13 is connected with the current collector 10, the dust is prevented from contacting the current collector, and the overall good dustproof effect is achieved.
[0034] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-restrictive in any respect, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application, and any reference signs in the claims should not be considered as limiting the claims.
Claims
1. A dustproof current transformer comprising a housing, a core, a primary coil and a secondary coil, the core is installed in the housing, the primary coil and the secondary coil are both wound on the core, characterized in that: The shell comprises a bottom box and a face cover which is detachably mounted on the top of the bottom box, the top of the bottom box is provided with a downward recess, a first annular insertion slot and a second annular insertion slot, the first annular insertion slot is distributed on the periphery of the recess, the second annular insertion slot is distributed on the periphery of the first annular insertion slot, the bottom of the face cover is connected with a first annular insertion block inserted into the first annular insertion slot and a second annular insertion block inserted into the second annular insertion slot, the top of the face cover is provided with four upward protruding power connection seats, the power connection seats are mounted with two first power connection pieces and two second power connection pieces, the first power connection pieces are connected with two ends of the primary coil, the second power connection pieces are connected with two ends of the secondary coil, the power connection seats are also detachably mounted with dust covers for covering the first / second power connection pieces.
2. The dustproof current transformer according to claim 1, characterized in that: The shell is provided with a first fixing block and a second fixing block for clamping the iron core, the first fixing block and the second fixing block are connected with an insertion rod which passes through the middle of the iron core for fixing the iron core.
3. The dustproof current transformer according to claim 2, characterized in that: The first fixing block is integrally connected with the bottom of the recess, the first fixing block is provided with a first insertion slot for inserting the insertion rod, the second fixing block is integrally connected with the bottom of the face cover, and the second fixing block is provided with a second insertion slot for inserting the insertion rod.
4. The dustproof current transformer according to claim 1, characterized in that: The primary coil is wound on one end of the iron core, the secondary coil is wound on the end of the iron core away from the primary coil, and the number of turns of the primary coil is greater than that of the secondary coil.
5. The dustproof current transformer according to claim 1, characterized in that: The outer side of the power connection seat is provided with external threads for mounting the dust cover, and the inner wall of the dust cover is provided with internal threads matched with the external threads.
6. The dustproof current transformer according to any one of claims 1-5, characterized in that: The shell is connected with a mounting seat for mounting, and the mounting seat is provided with a mounting hole.