Open-close type mutual inductor

Abstract

The open-close type mutual inductor comprises bases, a lower shell and an upper shell, the lower shell is fixedly connected between the bases, the upper shell is detachably connected to the upper portion of the lower shell, the top face of the lower shell abuts against the bottom face of the upper shell, grooves are formed in the middle of the outer surface of the lower shell and the middle of the outer surface of the upper shell, and the upper shell is detachably connected to the lower shell. The front face and the back face of the lower shell are fixedly connected with hanging points, the hanging points are transversely arranged, fastening rings are hooped in the grooves of the lower shell and the upper shell, and the ends of the fastening rings are fixedly connected with connectors. The utility model has the advantages that when the mutual inductor is closed, only the rotary fixing plate and the pin need to be inserted and pulled, the mutual inductor can be quickly mounted and dismounted under the condition that a cable or a bus is not cut off, and the mounting and dismounting speed is further improved compared with the prior art; therefore, great convenience is brought to maintenance and transformation work of an electric power system.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an opening and closing type transformer. Background Art

[0002] A current transformer is an instrument based on the principle of electromagnetic induction, which can convert the large current on the primary side into a small current on the secondary side for measurement. The busbar or cable passes through the current transformer. When the power system is maintained and renovated, the busbar or cable needs to be cut off, which is not convenient for renovation. Although there are opening and closing type transformers in the prior art, in order to ensure the firmness of the structure, screws and other methods are used to fasten the opening and closing parts, and the disassembly and installation are not convenient enough. Therefore, an opening and closing type transformer is proposed to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model aims to solve at least one of the technical defects.

[0004] For this reason, an object of the utility model is to provide an opening and closing type transformer to solve the problems mentioned in the background art and overcome the deficiencies existing in the prior art.

[0005] In order to achieve the above object, an embodiment of one aspect of the utility model provides an opening and closing type transformer, which includes a base, a lower shell and an upper shell. The lower shell is fixedly connected between the bases, and the upper shell is detachably connected above the lower shell. The top surface of the lower shell and the bottom surface of the upper shell are in mutual contact;

[0006] Grooves are formed in the middle of the outer surfaces of the lower shell and the upper shell. Hanging points are fixedly connected to the front and back of the lower shell, and the hanging points are arranged horizontally;

[0007] A fastening ring is buckled in the grooves of the lower shell and the upper shell. The end of the fastening ring is fixedly connected with a joint. A through groove is formed in the joint. A pin is inserted into one of the joints. The end of the pin is fixedly connected with an end head, and the end head abuts against the outside of the corresponding joint;

[0008] The other end of the pin is fixedly connected with a tension spring. The end of the tension spring is fixedly connected with a fixing plate. The fixing plate can pass through the through groove. Two points on the back of the fixing plate are fixedly connected with sleeves. A positioning post is fixedly connected to the surface of one of the joints. The sleeve is sleeved on the positioning post, and the end face of the sleeve abuts against the surface of the corresponding joint.

[0009] Preferably, according to any of the above solutions, both the lower shell and the upper shell are semi-circular, and there is a regular circular hole between the lower shell and the upper shell.

[0010] Adopting the above technical solution: This opening and closing type transformer can be freely opened and closed, the disassembly operation is simple, and it can be quickly installed under the state of without power cut and wire disconnection.

[0011] Preferably, according to any of the above solutions, the base is riveted to the lower shell.

[0012] Adopting the above technical solution: The main body of this current transformer is composed of a lower shell and an upper shell, and the materials of the lower shell and the upper shell are silicon steel, which has good magnetic conductivity.

[0013] The working principle of this current transformer is as follows: Pass the cable or busbar through this current transformer, and tie the busbar to the hanging point with a cable tie. This current transformer can perform current conversion. The primary side winding of this current transformer has fewer turns and is connected in series in the current circuit to be measured, and often the full current of the circuit flows through it. While the secondary side winding has more turns. When a large current flows through the primary side, according to the principle of electromagnetic induction, an induced electromotive force will be generated in the secondary side winding, thereby driving the generation of the secondary side current. Since the number of turns of the secondary side winding is more than that of the primary side, the current on the secondary side will be less than the current on the primary side, realizing the conversion of current from large to small.

[0014] This current transformer can measure current: By measuring the magnitude of the secondary side current, the magnitude of the primary side current can be deduced. Since there is a certain proportional relationship (i.e., turn ratio) between the secondary side current and the primary side current, the actual value of the primary side current can be obtained by measuring the secondary side current and multiplying it by the turn ratio.

[0015] Preferably, according to any of the above solutions, a positioning groove is provided in the middle of the bottom surface of the hanging point, the fastening ring is made of metal, and the fastening ring has elasticity.

[0016] Adopting the above technical solution: The lower shell and the upper shell can be separated. This design enables the current transformer to be installed and disassembled without cutting the cable or busbar, thus greatly facilitating the maintenance and renovation work of the power system. At the same time, the opening design also increases the flexibility of the current transformer, enabling it to adapt to cables or busbars of different sizes.

[0017] Preferably, according to any of the above solutions, there is a spacing between the joints, and the pin, the tension spring, the fixing plate, and the sleeve are of an integral structure.

[0018] Adopting the above technical solution: The core structure of this device is: lower shell, upper shell, groove, fastening ring, joint, through groove, pin, end head, tension spring, fixing plate, sleeve, positioning column. The core advantage of this device is: For this current transformer, on the premise of ensuring a good closed state, it abandons the use of traditional fixing structures such as screws, but adopts a newly designed closed structure. After the lower shell and the upper shell are aligned, the fastening ring is used to hoop in the groove, the joints are close to each other to fasten the lower shell and the upper shell, the pins are inserted into the through grooves, the fixing plate passes through the through grooves, the tension spring is pulled, and the fixing plate, the tension spring and the pins are rotated so that the sleeve is sleeved on the positioning column. The sleeve cooperates with the end head to make the joints close to each other, so as to achieve the purpose of good closing of the fastening ring, the lower shell and the upper shell, that is, this current transformer only needs to insert and pull and rotate the fixing plate and the pins when closing. This current transformer can be quickly installed and disassembled without cutting the cable or busbar, and the installation and disassembly speed is further improved compared with the prior art, thus greatly facilitating the maintenance and renovation work of the power system.

[0019] Preferably, according to any of the above solutions, the tension spring passes through the through groove of the corresponding joint.

[0020] Compared with the prior art, the advantages and beneficial effects of the present utility model are:

[0021] For this opening and closing type current transformer, through the cooperative setting of the lower shell, upper shell, groove, fastening ring, joint, through groove, pin, end head, tension spring, fixing plate, sleeve, positioning column, this current transformer, on the premise of ensuring a good closed state, abandons the use of traditional fixing structures such as screws, but adopts a newly designed closed structure. After the lower shell and the upper shell are aligned, the fastening ring is used to hoop in the groove, the joints are close to each other to fasten the lower shell and the upper shell, the pins are inserted into the through grooves, the fixing plate passes through the through grooves, the tension spring is pulled, and the fixing plate, the tension spring and the pins are rotated so that the sleeve is sleeved on the positioning column. The sleeve cooperates with the end head to make the joints close to each other, so as to achieve the purpose of good closing of the fastening ring, the lower shell and the upper shell, that is, this current transformer only needs to insert and pull and rotate the fixing plate and the pins when closing. This current transformer can be quickly installed and disassembled without cutting the cable or busbar, and the installation and disassembly speed is further improved compared with the prior art, thus greatly facilitating the maintenance and renovation work of the power system.

[0022] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1It is a structural schematic diagram of the utility model from the first perspective;

[0025] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle;

[0026] Figure 3 It is a structural schematic diagram of the positioning column of the utility model;

[0027] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0028] In the figure: 1-base, 2-lower shell, 3-upper shell, 5-groove, 6-hanging point, 7-fastening ring, 8-connector, 9-through slot, 10-pin, 11-end, 12-tension spring, 13-fixing plate, 14-sleeve, 15-positioning column. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figures 1-4 As shown, the split-type transformer comprises a base 1, a lower shell 2 and an upper shell 3. The base 1 is fixedly connected with the lower shell 2, and the upper shell 3 is detachably connected to the upper part of the lower shell 2. The top surface of the lower shell 2 and the bottom surface of the upper shell 3 are in contact with each other.

[0032] A groove 5 is provided in the middle of the outer surface of the lower shell 2 and the upper shell 3. The front and back of the lower shell 2 are fixedly connected with hanging points 6, which are arranged horizontally.

[0033] A fastening ring 7 is hooped in the groove 5 of the lower shell 2 and the upper shell 3, and a joint 8 is fixedly connected to the end of the fastening ring 7. A through slot 9 is opened on the joint 8. A pin 10 is inserted into one of the joints 8, and a terminal 11 is fixedly connected to the end of the pin 10. The terminal 11 abuts against the outer side of the corresponding joint 8;

[0034] The other end of the pin 10 is fixedly connected with a tension spring 12. The end of the tension spring 12 is fixedly connected with a fixing plate 13. The fixing plate 13 can pass through the through slot 9. Two points on the back of the fixing plate 13 are fixedly connected with sleeves 14. A positioning post 15 is fixedly connected to the surface of a joint 8. The sleeve 14 is sleeved on the positioning post 15, and the end face of the sleeve 14 abuts against the surface of the corresponding joint 8.

[0035] Embodiment 1: The lower shell 2 and the upper shell 3 are both semi-circular, and there is a regular circular hole between the lower shell 2 and the upper shell 3. This opening and closing type current transformer is characterized by being able to open and close freely, with simple disassembly operation, and can be quickly installed under the state of power-on and wire-uninterrupted. The base 1 is riveted to the lower shell 2. A positioning groove is opened in the middle of the bottom surface of the hanging point 6. The fastening ring 7 is made of metal and has elasticity.

[0036] Embodiment 2: The lower shell 2 and the upper shell 3 are separable. This design enables the current transformer to be installed and disassembled without cutting the cable or busbar, thus greatly facilitating the maintenance and transformation work of the power system. At the same time, the opening design also increases the flexibility of the current transformer, enabling it to adapt to different sizes of cables or busbars. There is a spacing between the joints 8. The pin 10, the tension spring 12, the fixing plate 13, and the sleeve 14 are of an integral structure. The tension spring 12 passes through the through slot 9 of the corresponding joint 8.

[0037] The working principle of the present utility model is as follows:

[0038] The main body of this current transformer is composed of a lower shell 2 and an upper shell 3. The materials of the lower shell 2 and the upper shell 3 are silicon steel, which has good magnetic conductivity. Pass the cable or busbar through this current transformer, and tie the busbar to the hanging point 6 with a cable tie. This current transformer can perform current conversion: The primary side winding of this current transformer has fewer turns and is connected in series in the current circuit to be measured, and often the full current of the circuit flows through. While the secondary side winding has more turns. When a large current flows through the primary side, according to the principle of electromagnetic induction, an induced electromotive force will be generated in the secondary side winding, thereby driving the generation of the secondary side current. Since the number of turns of the secondary side winding is more than that of the primary side, the current on the secondary side will be less than the current on the primary side, realizing the conversion of current from large to small.

[0039] This current transformer can measure current: By measuring the magnitude of the secondary side current, the magnitude of the primary side current can be deduced. Since there is a certain proportional relationship (i.e., turn ratio) between the secondary side current and the primary side current, the actual value of the primary side current can be obtained by measuring the secondary side current and multiplying it by the turn ratio.

[0040] When installing this mutual inductor, after aligning the lower shell 2 and the upper shell 3, use the fastening ring 7 to hoop it in the groove 5. The connectors 8 are close to each other to fasten the lower shell 2 and the upper shell 3. The pin 10 is inserted through the slot 9, and the fixing plate 13 passes through the slot 9. Pull the tension spring 12, and rotate the fixing plate 13, the tension spring 12 and the pin 10 to make the sleeve 14 sleeved on the positioning column 15. The sleeve 14 cooperates with the end 11 to make the connectors 8 close to each other, so as to achieve the purpose of good closing of the fastening ring 7, the lower shell 2 and the upper shell 3, that is, this mutual inductor. When opening this mutual inductor, pull and rotate the fixing plate 13, and remove the pin 10 from the slot 9. At this time, the fastening ring 7 is loosened, and the fastening ring 7 can be removed to separate the lower shell 2 and the upper shell 3.

[0041] Compared with the prior art, the utility model has the following beneficial effects compared with the prior art:

[0042] For this opening and closing type mutual inductor, through the cooperative setting of the lower shell 2, the upper shell 3, the groove 5, the fastening ring 7, the connector 8, the slot 9, the pin 10, the end 11, the tension spring 12, the fixing plate 13, the sleeve 14 and the positioning column 15, this mutual inductor, on the premise of ensuring a good closing state, abandons the use of traditional fixing structures such as screws, but adopts a newly designed closing structure. After aligning the lower shell 2 and the upper shell 3, use the fastening ring 7 to hoop it in the groove 5. The connectors 8 are close to each other to fasten the lower shell 2 and the upper shell 3. The pin 10 is inserted through the slot 9, and the fixing plate 13 passes through the slot 9. Pull the tension spring 12, and rotate the fixing plate 13, the tension spring 12 and the pin 10 to make the sleeve 14 sleeved on the positioning column 15. The sleeve 14 cooperates with the end 11 to make the connectors 8 close to each other, so as to achieve the purpose of good closing of the fastening ring 7, the lower shell 2 and the upper shell 3, that is, when this mutual inductor is closed, only the fixing plate 13 and the pin 10 need to be inserted, pulled and rotated. This mutual inductor can be quickly installed and disassembled without cutting off the cable or busbar, and the installation and disassembly speed is further improved compared with the prior art, thus greatly facilitating the maintenance and transformation work of the power system.

Claims

1. An opening and closing type current transformer, characterized in that, It comprises a base (1), a lower shell (2) and an upper shell (3), wherein the lower shell (2) is fixedly connected to the base (1), the upper part of the lower shell (2) is detachably connected to the upper part of the lower shell (2), and the top surface of the lower shell (2) and the bottom surface of the upper shell (3) are in contact with each other; A groove (5) is provided in the middle of the outer surfaces of the lower shell (2) and the upper shell (3); the front and back sides of the lower shell (2) are fixedly connected with hanging points (6), and the hanging points (6) are arranged horizontally; A fastening ring (7) is clamped in the groove (5) of the lower shell (2) and the upper shell (3); the end of the fastening ring (7) is fixedly connected to a joint (8); a through groove (9) is provided on the joint (8); a pin (10) is inserted into the joint (8); the end of the pin (10) is fixedly connected to an end head (11); the end head (11) abuts against the outer side of the corresponding joint (8); The other end of the pin (10) is fixedly connected to a tension spring (12), the end of the tension spring (12) is fixedly connected to a fixing plate (13), the fixing plate (13) can pass through the through slot (9), two points on the back of the fixing plate (13) are fixedly connected to sleeves (14), a surface of the joint (8) is fixedly connected to a positioning column (15), the sleeve (14) is sleeved on the positioning column (15), and the end face of the sleeve (14) abuts against the surface of the corresponding joint (8).

2. The opening and closing type current transformer according to claim 1, characterized in that: The lower shell (2) and the upper shell (3) are both semicircular, and a regular circular hole is provided between the lower shell (2) and the upper shell (3).

3. The split-type current transformer according to claim 2, wherein: The base (1) is riveted to the lower shell (2).

4. The opening and closing type current transformer according to claim 3, wherein: A positioning groove is provided in the middle of the bottom surface of the hanging point (6); the fastening ring (7) is made of metal and is elastic.

5. The split-type current transformer according to claim 4, characterized in that: There is a distance between the joints (8), and the pin (10), the tension spring (12), the fixing plate (13), and the sleeve (14) are an integrated structure.

6. The split-type current transformer according to claim 5, wherein: The tension spring (12) passes through the through slot (9) of the corresponding joint (8).

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