Shell for mutual inductor and mutual inductor
By designing the housing for the transformer and adopting a combination of grooves and limit structures, the problems of low anti-interference ability and low installation and disassembly efficiency of the transformer are solved, achieving higher detection accuracy and use safety.
Patent Information
- Application Number
- CN202421540503.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing transformers have low anti-interference ability, affect detection accuracy, and low installation and disassembly efficiency.
A housing for transformers is designed, using a combination of grooves and limit structures. Through the cooperation of elastic clamps and slots, rapid clamping and fixing is achieved, reducing dependence on screw fixing.
It improves the installation and disassembly efficiency of transformers, enhances anti-interference performance and detection accuracy, and ensures safety of use.
Smart Images
Figure CN223051955U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power detection equipment, and particularly relates to a housing for an instrument transformer and an instrument transformer. Background Art
[0002] A current transformer is an instrument that converts a primary current into a secondary current according to the principle of electromagnetic induction. The current transformer can change the large current in the primary circuit into a standard small current in the secondary circuit, and is widely used in circuits of power transformation, power transmission, power distribution and power consumption, such as for circuit protection or load monitoring systems for control and monitoring applications.
[0003] In the automotive field, such as in electric vehicle charging infrastructure, high-precision instrument transformers are usually used to detect the operating state, which requires them to have good anti-interference performance. However, the existing instrument transformers have the problem of low anti-interference ability, and the presence of external lightning strikes or high-voltage lines will affect the detection accuracy of the instrument transformer, which will affect the normal operation of equipment with high requirements for detection accuracy.
[0004] In addition, small current transformers are essential in various power distribution and power consumption systems, and their usage is larger for systems with more precise control processes. At present, the existing current transformers are mainly fixed by multiple screws, resulting in low installation and disassembly efficiency.
[0005] It can be seen that the existing technology still needs to be improved. Summary of the Utility Model
[0006] In view of the deficiencies of the above-mentioned existing technology, the purpose of the utility model is to provide a housing for an instrument transformer and an instrument transformer, aiming to improve the convenience of installation and disassembly of the instrument transformer.
[0007] To achieve the above purpose, the utility model adopts the following technical solutions:
[0008] The utility model provides a housing for an instrument transformer on the first aspect. A through hole is arranged in the middle of the housing. Among them, a first convex structure and a second convex structure are arranged on the housing, and a groove is formed between the first convex structure and the second convex structure; a first limiting structure is arranged on the first convex structure, and the first limiting structure is movably connected with the first convex structure; the first limiting structure is used to fix the structure placed in the groove in the groove.
[0009] For the housing for an instrument transformer, an installation groove is arranged on the first convex structure, and the first limiting structure is arranged in the installation groove; a plurality of clamping grooves are arranged on the groove wall of the installation groove; the plurality of clamping grooves are arranged along the length direction of the installation groove; the first limiting structure includes a limiting member and at least one elastic clamping member; the elastic clamping member is clamped with the clamping groove.
[0010] The described housing for an instrument transformer, wherein a hand-held member is provided at one end of the first limiting structure away from the mounting groove, and the hand-held member is fixedly connected to the limiting member and the elastic clamping member; a concave hole is provided on the hand-held member.
[0011] The described housing for an instrument transformer, wherein the first limiting structure includes a limiting member and two elastic clamping members; the limiting member is arranged between the two elastic clamping members; a plurality of clamping grooves are respectively provided on both sides of the mounting groove.
[0012] The described housing for an instrument transformer, wherein the elastic clamping member includes a connecting rod and at least one clamping block; the shape of the clamping groove is adapted to the clamping block, so that the clamping block can be disengaged under the pushing and pulling action of an external force; the connecting rod is fixedly connected to the limiting member.
[0013] The described housing for an instrument transformer, wherein a second limiting structure is provided on the second protruding structure, and the second limiting structure is arranged opposite to the first limiting structure.
[0014] The described housing for an instrument transformer, wherein the second protruding structure is a convex block; the convex block is arranged above the side wall of the groove for reducing the width of the upper notch of the groove.
[0015] The described housing for an instrument transformer, wherein a sealed annular cavity is arranged inside the housing.
[0016] The described housing for an instrument transformer, wherein a plurality of fixing members are further provided on the outer wall of the housing, and mounting holes are provided on the fixing members.
[0017] The second aspect of the present utility model provides an instrument transformer, including the housing for an instrument transformer described above, a coil is arranged inside the housing; an installation cavity is arranged inside the housing, and an opening communicating with the outside is provided on the cavity wall of the installation cavity; a connecting head is arranged inside the installation cavity, and the connecting head is connected to the coil and closes the opening.
[0018] Beneficial effects: The first aspect of the present utility model provides a housing for an instrument transformer, a groove is provided on the housing, and by arranging the first limiting structure to be used in combination with the groove, the housing can be quickly clamped with the fixed profile of the electrical equipment in the power distribution cabinet without the need to be fixed by screws, greatly improving the installation and disassembly efficiency.
[0019] The second aspect of the present utility model provides an instrument transformer, the instrument transformer adopts the housing described above, which not only has good usability, but also has good anti-interference performance, good detection accuracy and use safety. Description of the Drawings
[0020] Figure 1Schematic diagram of the structure of the housing for the mutual inductor Figure 1 。
[0021] Figure 2 Schematic diagram of the structure of the housing for the mutual inductor Figure 2 。
[0022] Figure 3 Schematic diagram of the structure of the housing for the mutual inductor Figure 3 。
[0023] Figure 4 Is Figure 3 A sectional view along line A - A'.
[0024] Figure 5 Schematic diagram of the structure of the first limiting structure
[0025] Figure 6 Schematic diagram of the structure of the housing for the mutual inductor Figure 4 。
[0026] Figure 7 Schematic diagram of the structure of the mutual inductor
[0027] Figure 8 Is Figure 7 A sectional view along line B - B'.
[0028] Explanation of main component symbols: 1 - housing, 2 - through hole, 3 - first convex structure, 4 - second convex structure, 5 - groove, 6 - first limiting structure, 31 - mounting groove, 32 - clamping groove, 61 - limiting part, 62 - elastic clamping part, 63 - handheld part, 64 - concave hole, 621 - connecting rod, 622 - clamping block, 7 - second limiting structure, 11 - annular cavity, 8 - coil, 9 - mounting cavity, 10 - connecting head, 91 - opening, 12 - fixing part, 121 - mounting hole. Specific embodiments
[0029] The present utility model provides a housing for a mutual inductor and a mutual inductor. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the following further elaborates on the present utility model with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is more than two.
[0031] Please refer to Figure 1 , the first aspect of the present utility model provides a housing 1 for an instrument transformer. A through hole 2 is provided in the middle of the housing 1. Among them, a first convex structure 3 and a second convex structure 4 are provided on the housing 1, and a groove 5 is formed between the first convex structure 3 and the second convex structure 4; a first limiting structure 6 is provided on the first convex structure 3, and the first limiting structure 6 is movably connected to the first convex structure 3; the first limiting structure 6 is used to fix the structure placed in the groove 5 within the groove 5.
[0032] In a power distribution cabinet or other power cabinets, there are standard wire grooves or profile members for wiring and installing and fixing various electrical devices. When the present utility model is specifically used, first place the installation part of the profile member into the groove 5, and then adjust the positional relationship between the first limiting structure 6 and the first convex structure 3 so that the first limiting structure 6 protrudes above the groove 5 and is located on the profile, thereby narrowing the upper notch of the groove 5 and making the first limiting structure 6 abut against the profile, so that the profile is fixed within the groove 5.
[0033] Please refer to Figures 1 - 4, In a preferred embodiment, an installation groove 31 is provided on the first convex structure 3, and the first limiting structure 6 is disposed in the installation groove 31; a plurality of clamping grooves 32 are provided on the groove wall of the installation groove 31; the plurality of clamping grooves 32 are arranged along the length direction of the installation groove 31; the first limiting structure 6 includes a limiting member 61 and at least one elastic clamping member 62; the elastic clamping member 62 is clamped with the clamping groove 32. In this embodiment, the installation groove 31 extends towards the upper notch direction of the groove 5. In the first limiting structure 6, a space for the elastic clamping member 62 to deform is provided between the limiting member 61 and the elastic clamping member 62. When it is necessary to protrude the limiting member 61 from the first convex structure 3, the first limiting structure 6 is pushed. At this time, the elastic clamping member 62 advances along the groove wall of the corresponding clamping groove 32 and approaches the side of the limiting member 61. After crossing the groove wall of the corresponding clamping groove 32, it enters the next clamping groove 32, and the elastic clamping member 62 rebounds. After the external force is removed, the first limiting structure 6 is stably clamped in the next clamping groove 32. At this time, the limiting member 61 protrudes from the first convex structure 3 and remains fixed. When it is necessary to retract the first limiting structure 6, the first limiting structure 6 is pulled back.
[0034] In a preferred embodiment, the included angles between the front side wall and the rear side wall of the clamping groove 32 and the moving direction of the elastic clamping member 62 are acute angles. The front side wall and the rear side wall of the clamping groove 32 can be flat surfaces or arc surfaces so that the elastic clamping member 62 can move along the side wall of the clamping groove 32 when moving. If the side wall of the clamping groove 32 is perpendicular to the moving direction of the elastic clamping member 62, the moving path of the elastic clamping member 62 will be completely blocked.
[0035] Please refer to Figure 5 , In a preferred embodiment, the elastic clamping member 62 includes a connecting rod 621 and at least one clamping block 622; the shape of the clamping groove 32 is adapted to the clamping block 622 so that the clamping block 622 can be disengaged under the pushing and pulling action of an external force; the connecting rod 621 is fixedly connected to the limiting member 61. The cross-sectional shape of the clamping block 622 in the horizontal direction can be semicircular or triangular, etc. The cross-sectional shape of the clamping groove 32 in the horizontal direction corresponds to that of the clamping block 622.
[0036] In a preferred embodiment, the included angles between the front side wall and the rear side wall of the clamping block 622 and the moving direction of the elastic clamping member 62 are acute angles.
[0037] Please refer to Figure 5 , In a preferred embodiment, a hand-held member 63 is provided at one end of the first limiting structure 6 away from the installation groove 31, and the hand-held member 63 is fixedly connected to the limiting member 61 and the elastic clamping member 62; a concave hole 64 is provided on the hand-held member 63. Preferably, a convex strip is provided on the hand-held member 63. The hand-held member 63 and the concave hole 64 are used to increase the friction force, facilitating the user to pull out the first limiting structure 6 from the first convex structure 3.
[0038] Please refer to Figure 4 and Figure 5 In a preferred embodiment, the first limiting structure 6 includes a limiting member 61 and two elastic clamping members 62; the limiting member 61 is disposed between the two elastic clamping members 62; a plurality of clamping grooves 32 are respectively disposed on two sides of the mounting groove 31. By respectively clamping the two elastic clamping members 62 with two sides of the mounting groove 31, compared with clamping only on one side, the clamping stability of this embodiment is better.
[0039] Please refer to Figure 7 and Figure 8 In a preferred embodiment, the second protruding structure 4 is provided with a second limiting structure 7, and the second limiting structure 7 is disposed opposite to the first limiting structure 6. The second limiting structure 7 may adopt the same structure as the first limiting structure 6 or may adopt other structures.
[0040] Please refer to Figure 7 and Figure 8 In a preferred embodiment, the second protruding structure 4 is a convex block; the convex block is disposed above the side wall of the groove 5 for reducing the width of the upper notch of the groove 5. By providing the convex block to reduce the width of the upper notch of the groove 5, the profile in the groove 5 can be restricted from coming out from one side of the second protruding structure 4. In addition, the setting of the convex block can correspondingly reduce the required protruding length of the first limiting structure 6, thereby reducing the volume of the first protruding structure 3 and the overall size of the housing 1. It should be further noted that only using the first limiting structure 6 can also stably fix the profile in the groove 5, but compared with this embodiment, when only using the first limiting structure 6, it is required that the length of the first limiting structure 6 protruding from the first protruding structure 3 is longer to achieve stable fixation.
[0041] Please refer to Figure 7 and Figure 8 In a preferred embodiment, a sealed annular cavity 11 is provided inside the housing 1. The annular cavity 11 is used for placing the coil 8. Specifically, the through hole 2 in the middle of the housing 1 is provided with a hole wall, and the hole wall participates in enclosing to form the annular cavity 11 as a part of the housing 1. The current transformer made of the housing 1 has no metal exposed, and the safety of installation and use is higher.
[0042] Please refer to Figure 6 In a preferred embodiment, a plurality of fixing members 12 are further provided on the outer wall of the housing 1, and mounting holes 121 are provided on the fixing members 12. In this embodiment, the housing 1 can also be fixed by screws to cope with the situation where there are few suitable clamping positions.
[0043] Please refer to Figure 7 andFigure 8 , in the second aspect of the present utility model, a mutual inductor is provided, which includes the housing 1 for the mutual inductor described above. A coil 8 is arranged inside the housing 1; an installation cavity 9 is arranged inside the housing 1, and an opening 91 communicating with the outside is arranged on the cavity wall of the installation cavity 9; a connector 10 is arranged inside the installation cavity 9, and the connector 10 is connected to the coil 8 and closes the opening 91.
[0044] Specifically, the connector 10 and the coil 8 are respectively arranged in two relatively independent spaces inside the housing 1. The connector 10 is arranged inside the housing 1, so that when the mutual inductor is used, the overall structure is simple and there are no exposed wire connectors.
[0045] In summary, the housing 1 for the mutual inductor provided by the present utility model can be conveniently installed on the profile inside the electrical cabinet by arranging the groove 5 and the first limiting structure 6.
[0046] In addition, the present utility model also forms a closed space by the housing 1 made of a specific material for placing the coil 8, which can effectively avoid the interference of external factors on the induction of the coil 8 and improve the stability of the induced current and the detection accuracy.
[0047] It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solution of the present utility model and its inventive concept, and all such changes or replacements should fall within the protection scope of the appended claims of the present utility model.
Claims
1. A housing for a mutual inductor, wherein a through hole is provided in the middle of the housing, characterized in that: The shell is provided with a first protrusion structure and a second protrusion structure, and a groove is formed between the first protrusion structure and the second protrusion structure; the first protrusion structure is provided with a first limiting structure, and the first limiting structure is movably connected to the first protrusion structure; the first limiting structure is used to fix the structure placed in the groove in the groove.
2. The housing for a mutual inductor according to claim 1, characterized in that: A mounting groove is provided on the first protrusion structure, and a first limiting structure is provided in the mounting groove; a plurality of card slots are provided on the groove wall of the mounting groove; the plurality of card slots are provided along the length direction of the mounting groove; the first limiting structure includes a limiting member and at least one elastic card member; the elastic card member is card-engaged with the card slot.
3. The housing for a mutual inductor according to claim 2, characterized in that: A hand piece is arranged at one end of the first limiting structure away from the mounting groove, and the hand piece is fixedly connected to the limiting piece and the elastic clamp; a concave hole is arranged on the hand piece.
4. The housing for a mutual inductor according to claim 2, characterized in that: The first limiting structure includes a limiting member and two elastic clamping members; the limiting member is arranged between the two elastic clamping members; and a plurality of clamping grooves are respectively arranged on both sides of the installation groove.
5. The housing for a mutual inductor according to claim 2, characterized in that: The elastic clamping member includes a connecting rod and at least one clamping block; the shape of the clamping slot is adapted to the clamping block, so that the clamping block can be disengaged under the push and pull action of external force; the connecting rod is fixedly connected to the limiting member.
6. The housing for a mutual inductor according to claim 1, characterized in that: The second protrusion structure is provided with a second limiting structure, and the second limiting structure is arranged opposite to the first limiting structure.
7. The housing for a mutual inductor according to claim 6, characterized in that: The second protrusion structure is a bump; the bump is arranged above the side wall of the groove and is used to reduce the width of the upper notch of the groove.
8. The housing for a mutual inductor according to claim 1, characterized in that: A closed annular cavity is arranged in the shell.
9. The housing for a mutual inductor according to claim 1, characterized in that: A plurality of fixing members are also arranged on the outer wall of the shell, and mounting holes are arranged on the fixing members.
10. A mutual inductor, characterized in that: It comprises a shell for a mutual inductor as described in any one of claims 1 to 9, wherein a coil is arranged in the shell; an installation cavity is arranged in the shell, and an opening communicating with the outside is arranged on the cavity wall of the installation cavity; a connector is arranged in the installation cavity, the connector is connected to the coil and closes the opening.