Mutual inductor
By installing protective sleeves and fixed rubber sleeves in the transformer, the central tube and reinforcement structure are used to isolate the conductor heat, which solves the problem that conductor heat affects the accuracy of the transformer, and improves the performance of the transformer and the induction detection accuracy.
Patent Information
- Application Number
- CN202521250231.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2035-06-18
AI Technical Summary
The heat generated by the power on the wire is transmitted to the coil winding, affecting the induction detection accuracy and sensitivity of the transformer, and thus affecting the operational sensitivity of the circuit breaker.
The protective sleeve and a fixed rubber sleeve are installed in the main body of the transformer. The wire passes through the central pipe. The central pipe is set between the coil winding and the wire to isolate heat conduction. The protective sleeve made of fire-resistant plastic material, a semispherical bump and reinforcement structure are used to enhance the heat insulation effect.
Effectively isolate the conduction of conduction of conduction of conduction of conduction on the coil winding, protecting the coil winding, and improving the performance of transformers and induction detection accuracy.
Smart Images
Figure CN223167324U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, and particularly relates to a 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. 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 to be measured passes. Therefore, it often has the entire current of the circuit flowing through it. The secondary side winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary side circuit is always closed. Therefore, the impedance of the series coil in the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to a short circuit. A current transformer converts a large current on the primary side into a small current on the secondary side for measurement, and the secondary side cannot be open-circuited. When the transformer detects a leakage in the circuit, it will send a signal to the release, and the release will drive the circuit breaker to trip.
[0003] Transformers are mainly used in circuit breakers. Especially in some low-voltage circuit breakers, the transformer consists only of an annular iron core and a coil wound around the iron core, and then a protective rubber strip is wound outside the coil for fixation, and the wire passes through the central hole of the transformer; however, during the use of the circuit breaker, when the wire is energized, heat will be generated, and the heat generated by the wire will be conducted to the coil, thereby affecting the coil on the transformer. Prolonged high temperature will affect the accuracy and sensitivity of the transformer's induction detection, thereby affecting the operating sensitivity of the circuit breaker. Summary of the Utility Model
[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a transformer to solve the above problems.
[0005] The technical solution of the utility model is realized as follows: A transformer includes,
[0006] A transformer main body, the transformer main body includes an iron core and a coil winding wound around the iron core. The iron core is circularly arranged, and a central hole for the wire to pass through is provided in the center of the transformer main body;
[0007] A protective sleeve, the protective sleeve includes a base and a central tube. The central tube is inserted into the central hole of the transformer main body. The base is provided at the lower end of the central tube and extends outward, and the base extends to the lower side of the transformer main body;
[0008] A fixing rubber sleeve, the fixing rubber sleeve is sleeved outside the transformer main body and the protective sleeve, and the upper and lower ends of the fixing rubber sleeve respectively extend to the upper side of the transformer main body and the lower side of the protective sleeve.
[0009] By adopting the above technical solution, the protective sleeve is installed inside the main body of the mutual inductor, and the energized wire passes through the center of the central tube. The central tube is arranged between the coil winding and the wire, so as to effectively isolate the heat generated by the wire, reduce the heat conduction to the coil winding, effectively protect the main body of the mutual inductor, and ensure its service performance.
[0010] The present utility model is further arranged as: the upper end of the central tube is not lower than the upper side of the main body of the mutual inductor.
[0011] By adopting the above technical solution, it can effectively prevent the wire from contacting the coil winding, effectively protect the coil winding, and avoid the direct conduction of heat to the coil winding.
[0012] The present utility model is further arranged as: the outer diameter of the central tube is smaller than the inner diameter of the central hole of the main body of the mutual inductor.
[0013] By adopting the above technical solution, it can not only make the central tube more smooth and convenient when inserted into the main body of the mutual inductor, but also reduce the heat conduction from the central tube to the coil winding, improving the heat insulation effect.
[0014] The present utility model is further arranged as: a plurality of convex blocks are protrudingly provided on the outer wall of the central tube.
[0015] By adopting the above technical solution, the convex blocks can limit the distance between the outer wall of the central tube and the main body of the mutual inductor, and reduce the contact area with the coil winding, reducing the heat conduction.
[0016] The present utility model is further arranged as: the convex blocks are arranged in a hemispherical shape.
[0017] By adopting the above technical solution, the hemispherical convex blocks can avoid damaging the coil winding.
[0018] The present utility model is further arranged as: reinforcing ribs are protrudingly provided on the inner wall of the central tube. The reinforcing ribs are arranged in a ring shape, and the central axis of the reinforcing ribs coincides with the central axis of the central tube.
[0019] By adopting the above technical solution, when the wire passes through the central tube, it will contact the reinforcing ribs, thereby reducing the direct contact with the central tube, reducing the heat conduction, and further improving the heat insulation effect.
[0020] The present utility model is further arranged as: the reinforcing ribs are arranged in a plurality along the length direction of the central tube. The uppermost reinforcing rib is arranged at the upper end inside the central tube, and the lowermost reinforcing rib is arranged at the lower end inside the central tube. The reinforcing ribs can also improve the strength of the central tube.
[0021] By adopting the above technical solution, it can effectively prevent the wire from contacting the inner diameter of the central tube, thereby improving the heat insulation effect.
[0022] The utility model is further configured such that the protective sleeve is integrally formed and made of fireproof plastic material.
[0023] By adopting the above technical solution, the strength and heat insulation performance of the protective sleeve are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0025] Figure 1 It is a structural sectional view of the specific embodiment of the present utility model;
[0026] Figure 2 It is a structural top view of the specific embodiment of the present utility model; SPECIFIC EMBODIMENTS
[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.
[0028] As Figure 1 - Figure 2 shown, the present utility model discloses an instrument transformer, including,
[0029] An instrument transformer main body 1, the instrument transformer main body 1 includes an iron core 10 and a coil winding 11 wound around the iron core 10. The iron core 10 is circularly arranged, and a central hole for a wire to pass through is provided at the center of the instrument transformer main body 1;
[0030] A protective sleeve 2, the protective sleeve 2 includes a base 20 and a central tube 21. The central tube 21 is inserted into the central hole of the instrument transformer main body 1. The base 20 is provided at the lower end of the central tube 21 and extends outward. The base 20 extends to the lower side of the instrument transformer main body 1;
[0031] A fixing rubber sleeve 3, the fixing rubber sleeve 3 is sleeved on the outside of the instrument transformer main body 1 and the protective sleeve 2. The upper and lower ends of the fixing rubber sleeve 3 respectively extend to the upper side of the instrument transformer main body 1 and the lower side of the protective sleeve 2.
[0032] By adopting the above technical solution, the protective sleeve 2 is installed inside the main body 1 of the current transformer, and the energized wire passes through the center of the central tube 21. The central tube 21 is arranged between the coil winding 11 and the wire, so that the heat generated by the wire can be effectively isolated, the heat conduction to the coil winding 11 is reduced, the main body of the current transformer is effectively protected, and its service performance is ensured.
[0033] In the embodiment of the present utility model, the upper end of the central tube 21 is not lower than the upper side of the main body 1 of the current transformer.
[0034] By adopting the above technical solution, the contact between the wire and the coil winding 11 can be effectively avoided, the coil winding 11 is effectively protected, and the heat is prevented from being directly conducted to the coil winding 11.
[0035] In the embodiment of the present utility model, the outer diameter of the central tube 21 is smaller than the inner diameter of the central hole of the main body 1 of the current transformer.
[0036] By adopting the above technical solution, the central tube 21 can be inserted into the main body 1 of the current transformer more smoothly and conveniently, and the heat conduction from the central tube 21 to the coil winding 11 can be reduced, improving the heat insulation effect.
[0037] In the embodiment of the present utility model, a plurality of convex blocks 210 are protrudingly provided on the outer wall of the central tube 21.
[0038] By adopting the above technical solution, the convex blocks 210 can limit the distance between the outer wall of the central tube 21 and the main body 1 of the current transformer, and reduce the contact area with the coil winding 11, reducing heat conduction.
[0039] In the embodiment of the present utility model, the convex blocks 210 are provided in a hemispherical shape.
[0040] By adopting the above technical solution, the hemispherical convex blocks 210 can avoid damaging the coil winding 11.
[0041] In the embodiment of the present utility model, reinforcing ribs 211 are protrudingly provided on the inner wall of the central tube 21. The reinforcing ribs 211 are arranged in a ring shape, and the central axis of the reinforcing ribs 211 coincides with the central axis of the central tube 21.
[0042] By adopting the above technical solution, when the wire passes through the central tube 21, it will contact the reinforcing ribs 211, thereby reducing the direct contact with the central tube 21, reducing heat conduction, and further improving the heat insulation effect.
[0043] In the embodiment of the present utility model, a plurality of reinforcing ribs 211 are arranged along the length direction of the central tube 21. The uppermost reinforcing rib 211 is arranged at the upper end inside the central tube 21, and the lowermost reinforcing rib 211 is arranged at the lower end inside the central tube 21. The reinforcing rib 211 can also improve the strength of the central tube 21.
[0044] By adopting the above technical solution, it can effectively avoid the contact between the wire and the inner diameter of the central tube 21, thereby improving the heat insulation effect.
[0045] In the embodiment of the present utility model, the protective sleeve 2 is integrally formed, and the protective sleeve 2 is made of a fireproof plastic material.
[0046] By adopting the above technical solution, the strength and heat insulation performance of the protective sleeve 2 are effectively improved.
[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A mutual inductor, characterized in that, including, a main body of the mutual inductor (1), the main body of the mutual inductor (1) includes an iron core (10) and a coil winding (11) wound around the iron core (10), the iron core (10) is arranged in a circular ring shape, and a central hole for a wire to pass through is provided at the center of the main body of the mutual inductor (1); a protective sleeve (2), the protective sleeve (2) includes a base (20) and a central tube (21), the central tube (21) is inserted into the central hole of the main body of the mutual inductor (1), the base (20) is arranged at the lower end of the central tube (21) and extends outward, and the base (20) extends to the lower side of the main body of the mutual inductor (1); a fixing rubber sleeve (3), the fixing rubber sleeve (3) is sleeved outside the main body of the mutual inductor (1) and the protective sleeve (2), and the upper and lower ends of the fixing rubber sleeve (3) respectively extend to the upper side of the main body of the mutual inductor (1) and the lower side of the protective sleeve (2).
2. An instrument transformer according to claim 1, characterized in that, The upper end of the central tube (21) is not lower than the upper side of the main body of the mutual inductor (1).
3. An instrument transformer according to claim 1, characterized in that, The outer diameter of the central tube (21) is smaller than the inner diameter of the central hole of the main body of the mutual inductor (1).
4. An instrument transformer according to claim 1, characterized in that, A plurality of convex blocks (210) are protrudingly provided on the outer wall of the central tube (21).
5. An instrument transformer according to claim 4, characterized in that, The convex blocks (210) are set to be hemispherical.
6. A current transformer according to claim 1, characterized in that, Reinforcing ribs (211) are protrudingly provided on the inner wall of the central tube (21), the reinforcing ribs (211) are arranged in a circular ring shape, and the central axis of the reinforcing ribs (211) coincides with the central axis of the central tube (21).
7. An instrument transformer according to claim 6, wherein The reinforcing ribs (211) are arranged in a plurality along the length direction of the central tube (21), the uppermost reinforcing rib (211) is arranged at the upper end inside the central tube (21), and the lowermost reinforcing rib (211) is arranged at the lower end inside the central tube (21).
8. A current transformer according to claim 1, characterized in that The protective sleeve (2) is integrally formed, and the protective sleeve (2) is made of a fireproof plastic material.