Open type mutual inductor

Abstract

The utility model relates to the field of mutual inductors, in particular to an open type mutual inductor. The first shell is movably connected with the second shell, semicircular iron cores are arranged in the first shell and the second shell, the outer sides of the iron cores are sleeved with frameworks, the frameworks comprise a first framework and a second framework which are arranged at the two ends of the iron cores in a sleeving mode respectively, and one end of the first framework is connected with one end of the second framework; the outer side of the joint end part of the first framework and the second framework is wound with a waterproof adhesive tape or coated with a sealant; the framework comprises the first framework body and the second framework body which are arranged at the two ends of the iron core in a sleeving mode respectively, the first framework body and the second framework body are both pipes which are integrally formed in an injection molding mode, the appearance of each pipe is about one fourth of a circle, and the section of each pipe is square, and good sealing performance and waterproofness can be achieved only by winding waterproof adhesive tape or smearing sealant at the joint of the first framework body and the second framework body.

Description

Technical Field

[0001] The utility model relates to the field of mutual inductors, in particular to an open type mutual inductor. Background Art

[0002] Current current transformers are mainly divided into closed-loop current transformers and open-loop current transformers according to their applications. Closed-loop current transformers need to be installed in advance when installing the distribution circuit. The cable passes through the transformer through the through hole and then connected to the distribution circuit. Open-loop current transformers can be installed in existing distribution circuits, that is, they can be installed without changing or powering off, which is convenient and labor-saving. In recent years, they have been more and more widely used.

[0003] The utility model patent with application number CN202020333146.9 discloses a coil frame structure of a transformer and an open-type transformer. The coil frame structure of the transformer includes a frame body, a receiving groove for loading an iron core is provided in the frame body, a first limit portion and a second limit portion are provided on the circumferential outer wall of the frame body, and a winding portion for coil winding is formed between the opposite surfaces of the first limit portion and the second limit portion; a mounting portion for installation in a transformer housing is also provided on the circumferential outer wall of the frame body, and the mounting portion is arranged on the outside of the winding portion.

[0004] The coil frame structure of the above-mentioned mutual inductor comprises a first frame and a second frame that can be opened and closed, and the adhesive tape can play a role in fixing the first frame and the second frame. Figure 3 It can be seen that the first frame and the second frame are mirror-imaged on opposite sides of the iron core, and the joint area between the first frame and the second frame is large, which will lead to poor sealing and waterproof properties between the first frame and the second frame. Moisture can easily penetrate into the frame and cause the iron core to rust, thereby affecting the performance and life of the transformer. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an open type mutual inductor, the whole frame of which has good sealing and waterproof properties, so as to solve the problem that the existing mutual inductor frame has poor sealing and waterproof properties.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: an open-type mutual inductor, including a shell, the shell including a first shell and a second shell arranged opposite to each other, the first shell and the second shell being movably connected, a semicircular iron core is arranged in the first shell and the second shell, a skeleton is sleeved on the outside of the iron core, two ends of the iron core are respectively exposed from two ends of the skeleton, a positioning structure is provided between the shell and the corresponding skeleton, and a secondary winding is wound on the outside of the skeleton; the skeleton includes a first skeleton and a second skeleton respectively sleeved on the two ends of the iron core, one end of the first skeleton is connected to one end of the second skeleton, and a waterproof tape is wound on the outside of the end where the first skeleton and the second skeleton are connected, or a sealant is applied to the end where the first skeleton and the second skeleton are connected.

[0007] As a further improvement, a clamping plate is provided at one end of the first frame close to the second frame, and a clamping groove for the clamping plate to be clamped into is provided at one end of the second frame close to the first frame.

[0008] As a further improvement, a sealing groove is provided on the end surface of one of the skeletons, a sealing member is embedded in the sealing groove, and a protrusion for pressing the sealing member is provided on the end surface of the other skeleton.

[0009] As a further improvement, an elastic member is provided in one of the frameworks, and the elastic member acts on the corresponding iron core to make two ends of the iron core extend out of two ends of the corresponding framework respectively.

[0010] As a further improvement, one end of the first shell and one end of the second shell are hinged to each other, a hook is fixedly mounted on the other end of the first shell, and a hook matching the hook is provided on the second shell.

[0011] As a further improvement, the first shell and the second shell each include two half shells arranged opposite to each other, the two half shells are mirror-distributed on opposite sides of the plane where the iron core is located, and the two half shells are ultrasonically welded or bonded by sealant; a connecting plate is integrally formed at one end of the hook, and a fixing hole matching the connecting plate is provided between the two half shells of the first shell, the fixing hole is connected to the inner cavity of the first shell, and the end of the connecting plate away from the hook extends into the inner cavity of the first shell, and a limiting portion is integrally formed thereon for preventing the connecting plate from detaching from the fixing hole.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are:

[0013] (1) The frame of the present application includes a first frame and a second frame respectively sleeved on both ends of the iron core. The first frame and the second frame are integrally injection-molded tubes with an outer shape of about 1 / 4 of a circle and a square cross-section. Good sealing and waterproofing can be achieved by simply wrapping a waterproof tape or applying a sealant at the junction of the first frame and the second frame;

[0014] (2) In the present application, a sealing member is provided on the end face of one set of frames, and a protrusion for pressing the sealing member is provided on both end faces of the other set of frames. When the first shell and the second shell are closed, the protrusion on the end face of one set of frames presses the sealing silicone on the end face of the other set of frames, which is beneficial to improving the sealing and waterproof properties of the entire frame;

[0015] (3) A set of elastic members is provided in the frame of the present application, and the elastic members are specifically elastic sheets. When the first shell and the second shell are closed, the elastic sheets can ensure that the end faces of the two iron cores are tightly combined;

[0016] (4) A connecting plate is integrally formed at one end of the hook of the present application, a fixing hole matching the connecting plate is provided between the two half shells of the first shell, and a limiting portion is provided at the end of the connecting plate away from the hook. By fixing the hook in this way, the complexity of the shell injection mold can be simplified and the diversity and aesthetics of the hook shape can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional schematic diagram of

[0020] Figure 3 It is an exploded schematic diagram of the skeleton of an embodiment of the utility model;

[0021] Figure 4 It is a cross-sectional schematic diagram of the skeleton of an embodiment of the utility model;

[0022] Figure 5 is an exploded schematic diagram of a first housing of an embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of a hook in an embodiment of the utility model.

[0024] In the figure: 1-first shell; 2-second shell; 3-threading hole; 4-pin; 5-hook; 6-hook; 7-skeleton; 8-support plate; 9-positioning groove; 10-limiting plate; 11-first skeleton; 12-second skeleton; 13-clamping plate; 14-clamping groove; 15-positioning protrusion; 16-positioning hole; 17-sealing groove; 18-sealing silicone; 19-protrusion; 20-elastic sheet; 21-step part; 22-iron core; 23-half shell; 24-connecting plate; 25-fixing hole; 26-limiting part; 27-installation hole. DETAILED DESCRIPTION

[0025] like Figures 1 to 6 As shown, an open-type mutual inductor includes a shell, and the shell includes a first shell 1 and a second shell 2 that are arranged opposite to each other, and a threading hole 3 is provided between the first shell 1 and the second shell 2. The first shell 1 and the second shell 2 are movably connected. Specifically, one end of the first shell 1 and one end of the second shell 2 are hinged to each other through a pin 4. The first shell 1 and the second shell 2 rotate to both sides around the pin 4 to open the threading hole 3, so that the cable can be passed through. In addition, in order to facilitate the fixing of the cable, a mounting hole 27 for inserting a cable tie is also provided on the first shell 1, so that the cable can be fixed by the cable tie. A hook 5 is fixedly installed on the outer side of the end of the first shell 1 away from the pin 4, and a hook 6 matching the hook 5 is integrally formed on the outer side of the end of the second shell 2 away from the pin 4. The hook 5 is hung on the hook 6 to keep the first shell 1 and the second shell 2 in a closed state.

[0026] A semicircular iron core 22 is provided in both the first shell 1 and the second shell 2. The ends of the two iron cores 22 are arranged opposite to each other, and the corresponding ends of the two iron cores 22 are provided with mating surfaces that match each other. An arc-shaped frame 7 is sleeved on the outer side of the iron core 22. A receiving cavity for placing the iron core 22 is provided in the frame 7. The two ends of the iron core 22 are exposed from the two ends of the frame 7 respectively. The first shell 1 and the second shell 2 are both formed by injection molding of two half shells 23 arranged opposite to each other. The two half shells 23 are mirror-distributed on the opposite sides of the plane where the iron core 22 is located. The two half shells 23 are bonded by ultrasonic welding or sealing adhesive. Figure 5 and Figure 6As shown, a connecting plate 24 is integrally formed at one end of the hook 5, and a fixing hole 25 matching the connecting plate 24 is provided between the two half shells 23 of the first shell 1, and the fixing hole 25 is connected to the inner cavity of the first shell 1, and the end of the connecting plate 24 away from the hook 5 extends into the inner cavity of the first shell 1, and a limiting portion 26 for preventing the connecting plate 24 from being separated from the fixing hole 25 is integrally formed, and the connecting plate 24 and the limiting portion 26 are in a "T" shape as a whole, so as to prevent the hook 5 from falling off from the first shell 1. By fixing the hook 5 in this way, the complexity of the shell injection mold can be simplified, and the modeling diversity of the hook 5 can be improved. The first shell 1 and the second shell 2 are opposite to each other and are respectively provided with openings for exposing the ends of the corresponding skeletons 7. When the first shell 1 and the second shell 2 are closed, the corresponding end faces of the two iron cores 22 are driven to engage. A positioning structure is provided between the shell and the corresponding skeleton 7. The positioning structure includes support plates 8 integrally formed on the outer sides of the two ends of the skeleton 7, the support plates 8 abut against the inner wall of the shell, and a positioning groove 9 is provided between the support plates 8 and the corresponding end faces of the skeleton 7. A limiting plate 10 for being inserted into the positioning groove 9 is integrally formed on the inner wall of the shell, so as to prevent the skeleton 7 from moving in the shell. The outer side of the skeleton 7 is wound with a secondary winding.

[0027] The skeleton 7 includes a first skeleton 11 and a second skeleton 12 respectively sleeved on both ends of the iron core 22. The first skeleton 11 and the second skeleton 12 are integrally injection molded tubes with an outer shape of about 1 / 4 of a circle and a square cross-section. One end of the first skeleton 11 is joined to one end of the second skeleton 12, and a waterproof tape is wrapped around the outer side of the end where the first skeleton 11 and the second skeleton 12 are joined, or a sealant is applied to the joint of the first skeleton 11 and the second skeleton 12. The first skeleton 11 and the second skeleton 12 have sealing properties, and the area where the first skeleton 11 and the second skeleton 12 are joined is smaller. It is only necessary to wrap a waterproof tape around the joint of the first skeleton 11 and the second skeleton 12 or apply a sealant to achieve good sealing and waterproof properties, which can effectively improve the service life of the mutual inductor.

[0028] In order to improve the reliability of the connection between the first frame 11 and the second frame 12, a clamping plate 13 is integrally formed on the opposite sides of one end of the first frame 11 close to the second frame 12, and the inner side of the clamping plate 13 is flush with the inner wall of the first frame 11. The end of the second frame 12 close to the first frame 11 is provided with a clamping groove 14 for the clamping plate 13 to be clamped into, and a positioning protrusion 15 is integrally formed on the outer side of the clamping plate 13, and a positioning hole 16 for the positioning protrusion 15 to be clamped into is provided on the side wall of the clamping groove 14.

[0029] A sealing groove 17 is provided on both end faces of one of the skeletons 7, and the sealing groove 17 is arranged around the end of the iron core 22. A sealing member is embedded in the sealing groove 17, and the sealing member is specifically a sealing silicone 18. A protrusion 19 for pressing the sealing member is formed integrally on both end faces of the other skeleton 7, and the protrusion 19 is also arranged around the end of the iron core 22. When the first shell 1 and the second shell 2 are closed, the corresponding end faces of the two skeletons 7 are driven to engage, and the protrusion 19 on the end face of one skeleton 7 presses the sealing silicone on the end face of the other skeleton 7, so as to achieve the sealing of the end face of the iron core 22 and the inner cavity of the two skeletons 7.

[0030] The inner wall of one of the frames 7 fits with the corresponding iron core 22, so that the iron core 22 is completely fixed inside the frame 7; a gap is provided between the inner wall of the other frame 7 and the corresponding iron core 22, in which the iron core 22 can move in a small range, and an elastic member is provided in the frame 7, which acts on the corresponding iron core 22 and makes the two ends of the iron core 22 extend out of the two ends of the corresponding frame 7. The elastic member is specifically an elastic sheet 20, and the inner walls of the corresponding first frame 11 and the second frame 12 are respectively provided with step portions 21 supported at the two ends of the elastic sheet 20, and the middle part of the outer peripheral surface of the corresponding iron core 22 abuts against the elastic sheet 20. When the first shell 1 and the second shell 2 are closed, the elastic sheet 20 can ensure that the end faces of the two iron cores 22 are tightly combined.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An open type mutual inductor, characterized in that: It includes a shell, which includes a first shell and a second shell that are arranged opposite to each other, the first shell and the second shell are movably connected, a semicircular iron core is arranged in the first shell and the second shell, a frame is sleeved on the outside of the iron core, two ends of the iron core are respectively exposed from two ends of the frame, a positioning structure is provided between the shell and the corresponding frame, and a secondary winding is wound on the outside of the frame; the frame includes a first frame and a second frame that are respectively sleeved on the two ends of the iron core, one end of the first frame is connected to one end of the second frame, and a waterproof tape is wound on the outside of the end where the first frame and the second frame are connected, or a sealant is applied to the end where the first frame and the second frame are connected.

2. An open-type mutual inductor according to claim 1, characterized in that: A clamping plate is provided at one end of the first frame close to the second frame, and a clamping groove for clamping the clamping plate is provided at one end of the second frame close to the first frame.

3. An open-type mutual inductor according to claim 1, characterized in that: A sealing groove is provided on the end surface of one of the skeletons, and a sealing member is embedded in the sealing groove. A protrusion for pressing the sealing member is provided on the end surface of the other skeleton.

4. An open-type mutual inductor according to claim 1, characterized in that: An elastic member is disposed in one of the frames, and the elastic member acts on the corresponding iron core to make two ends of the iron core extend out of two ends of the corresponding frame respectively.

5. An open-type mutual inductor according to claim 1, characterized in that: One end of the first shell and one end of the second shell are hinged to each other, a hook is fixedly installed on the other end of the first shell, and a hook matching the hook is provided on the second shell.

6. An open-type mutual inductor according to claim 5, characterized in that: The first shell and the second shell each include two half shells arranged opposite to each other, the two half shells are mirror-distributed on opposite sides of the plane where the iron core is located, and the two half shells are ultrasonically welded or bonded by sealant; a connecting plate is integrally formed at one end of the hook, and a fixing hole matching the connecting plate is provided between the two half shells of the first shell, the fixing hole is connected to the inner cavity of the first shell, and one end of the connecting plate away from the hook extends into the inner cavity of the first shell, and a limiting portion is integrally formed thereon for preventing the connecting plate from detaching from the fixing hole.

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