Coil protection structure of mutual inductor

Abstract

The utility model relates to the technical field of protective structures, in particular to a coil protective structure of a mutual inductor, which comprises a first protective frame and a second protective frame which are vertically arranged, the front surface of the first protective frame is attached to the back surface of the second protective frame, and the inner wall of the first protective frame is fixedly connected with an inner frame. Compared with the prior art, the coil has the advantages that a worker can use a wire to connect the coil body with the adapter, then covers the first protection frame with the second protection frame until the positioning pins are inserted into the positioning holes, and then inserts the assembly plates into the two sides of the first protection frame and the two sides of the second protection frame along the guide frames; at the moment, an L-shaped locking plate slides into a locking groove until a clamping plate is completely inserted into the clamping groove, and then an assembling plate is locked by using a locking bolt, so that the quick assembly of the coil main body can be realized, the bolt is prevented from penetrating through the two sealing protective covers, and the influence on the internal space of the sealing protective covers is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of protection structures, in particular to a coil protection structure for an instrument transformer. Background Technique

[0002] The instrument transformer, as a crucial measurement and conversion device in the power system, the stability and safety of its performance are directly related to the overall operation effect of the power system. The working principle of the instrument transformer is based on the electromagnetic induction law. Through the electromagnetic coupling between the primary coil and the secondary coil, the transfer and conversion of energy are realized. The coil protection structure of the instrument transformer is an important component for protecting the instrument transformer coil, aiming to improve the seismic resistance, stability and service life of the instrument transformer. The coil protection structure of the instrument transformer usually refers to the design of encapsulating the instrument transformer coil between two sealed shields. These two sealed shields are connected by a plurality of bolts to form a solid protective layer, which can effectively prevent external environmental factors (such as humidity, dust, vibration, etc.) from damaging the coil.

[0003] There are some problems with the traditional coil protection structure of the instrument transformer. For example, when the bolt penetrates through the two sealed shields, it may affect the space inside the sealed shield, resulting in unnecessary extrusion or deformation of the coil during installation and operation. This will not only affect the electromagnetic performance of the coil, but also may reduce the measurement accuracy and service life of the instrument transformer. Therefore, a coil protection structure for the instrument transformer is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to at least solve one of the technical defects.

[0005] For this reason, an object of the utility model is to provide a coil protection structure for an instrument transformer to solve the problems mentioned in the background technique and overcome the deficiencies existing in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the present utility model provides a coil protection structure for an instrument transformer, including a first protection frame and a second protection frame arranged vertically. The front surface of the first protection frame is attached to the back surface of the second protection frame. An inner frame is fixedly connected to the inner wall of the first protection frame. One end of the inner frame away from the first protection frame is attached to the inner wall of the second protection frame. A coil body is arranged between the first protection frame and the second protection frame. L-shaped locking plates are fixedly connected to the left and right sides of the first protection frame and the second protection frame. Assembly plates are slidably connected to the left and right sides of the first protection frame and the second protection frame. A locking groove is formed on the inner side of each assembly plate. The assembly plate is slidably connected to the L-shaped locking plate through the locking groove. Two locking bolts are threadedly connected to the bottom of each assembly plate. The screw parts of the two locking bolts are threadedly connected to the first protection frame and the second protection frame respectively. The tops of the two assembly plates are fixedly connected to a sealing frame. The bottom surface of the sealing frame is attached to the first protection frame and the second protection frame. Two adapters are fixedly connected to the top of the first protection frame. Both of the two adapters are electrically connected to the coil body. Both of the two adapters are located inside the sealing frame.

[0007] Preferably, according to any of the above solutions, limiting frames are fixedly connected to the inner walls of the first protection frame and the second protection frame. The coil body is slidably connected to the limiting frames.

[0008] Preferably, according to any of the above solutions, a positioning pin is fixedly connected to the inner wall of the second protection frame. A positioning hole is formed at one end of the inner frame away from the first protection frame. The positioning pin is slidably connected to the inner frame through the positioning hole.

[0009] Preferably, according to any of the above solutions, threaded holes are formed on the left and right sides of the first protection frame and the second protection frame. The screw part of the locking bolt is threadedly connected to the first protection frame and the second protection frame through the threaded holes.

[0010] Preferably, according to any of the above solutions, guide plates are fixedly connected to the front and back sides of the assembly plate. Two guide frames are fixedly connected to the outer side of each assembly plate. The two guide plates are respectively slidably connected to the two guide frames.

[0011] Preferably, according to any of the above solutions, a sealing groove is formed on the inner side of the first protection frame. A sealing gasket is fixedly connected to the inner side of the second protection frame. The sealing gasket is slidably connected to the first protection frame through the sealing groove.

[0012] Preferably, according to any of the above solutions, a plurality of clamping plates are fixedly connected to the bottom surface of the sealing frame. Card slots are formed on the top surfaces of the first protection frame and the second protection frame. The clamping plates are slidably connected to the first protection frame and the second protection frame through the card slots.

[0013] Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

[0014] 1. When assembling the current transformer, first insert one end of the coil body into the limiting frame inside the first protective frame, then connect the coil body and the adapter with a wire, and then cover the second protective frame on the first protective frame until the positioning pin is inserted into the positioning hole. Then insert the assembly plate along the guiding frame into both sides of the first protective frame and the second protective frame. At this time, the L-shaped locking plate will slide into the locking groove until the clamping plate is completely inserted into the clamping groove, and then use the locking bolt to lock the assembly plate. This can achieve the rapid assembly of the coil body and avoid the bolts passing through the two sealing covers, without affecting the space inside the sealing covers.

[0015] 2. When it is necessary to repair the coil body, the staff can twist the locking bolt to rotate it relative to the assembly plate until the screw part of the locking bolt moves out of the threaded hole, which can release the locking between the assembly plate and the first protective frame and the second protective frame. Then pull up the sealing frame until the assembly plate is separated from the L-shaped locking plate, and the locking between the first protective frame and the second protective frame can be released. The first protective frame and the second protective frame can be quickly disassembled to expose the coil body for easy repair. Description of the Drawings

[0016] Figure 1 is a structural schematic diagram of the assembly of the present utility model;

[0017] Figure 2 is an exploded structural schematic diagram of the assembly of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the sealing frame of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the first protective frame of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the second protective frame of the present utility model.

[0021] In the figure: 1 - First protective frame, 2 - Second protective frame, 3 - Inner frame, 4 - Coil body, 5 - L-shaped locking plate, 6 - Assembly plate, 7 - Locking groove, 8 - Locking bolt, 9 - Sealing frame, 10 - Adapter, 11 - Limiting frame, 12 - Positioning pin, 13 - Positioning hole, 14 - Threaded hole, 15 - Guide plate, 16 - Guiding frame, 17 - Sealing groove, 18 - Sealing gasket, 19 - Clamping plate, 20 - Clamping groove. Detailed Embodiments

[0022] The following further describes the present utility model in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0023] As Figures 1 to 5 shown, a coil protection structure of an instrument transformer includes a first protection frame 1 and a second protection frame 2 arranged vertically. The front surface of the first protection frame 1 is attached to the back surface of the second protection frame 2. An inner frame 3 is fixedly connected to the inner wall of the first protection frame 1. One end of the inner frame 3 away from the first protection frame 1 is attached to the inner wall of the second protection frame 2. A coil body 4 is arranged between the first protection frame 1 and the second protection frame 2. L-shaped locking plates 5 are fixedly connected to the left and right sides of the first protection frame 1 and the second protection frame 2. Assembly plates 6 are slidably connected to the left and right sides of the first protection frame 1 and the second protection frame 2. A locking groove 7 is formed on the inner side of each assembly plate 6. The assembly plate 6 is slidably connected to the L-shaped locking plate 5 through the locking groove 7. Two locking bolts 8 are threadedly connected to the bottom of each assembly plate 6. The screw parts of the two locking bolts 8 are threadedly connected to the first protection frame 1 and the second protection frame 2 respectively. The tops of the two assembly plates 6 are fixedly connected to a sealing frame 9. The bottom surface of the sealing frame 9 is attached to the first protection frame 1 and the second protection frame 2. Two adapters 10 are fixedly connected to the top of the first protection frame 1. Both of the two adapters 10 are electrically connected to the coil body 4. Both of the two adapters 10 are located inside the sealing frame 9.

[0024] As an alternative technical solution of the present utility model, limiting frames 11 are fixedly connected to the inner walls of the first protection frame 1 and the second protection frame 2. The coil body 4 is slidably connected to the limiting frames 11. The limiting frames 11 can position the coil body 4 to prevent the coil body 4 from shaking inside the first protection frame 1 and the second protection frame 2.

[0025] As an alternative technical solution of the present utility model, a positioning pin 12 is fixedly connected to the inner wall of the second protection frame 2. A positioning hole 13 is formed at one end of the inner frame 3 away from the first protection frame 1. The positioning pin 12 is slidably connected to the inner frame 3 through the positioning hole 13. The setting of the positioning pin 12 can make the connection between the first protection frame 1 and the second protection frame 2 more stable.

[0026] As an alternative technical solution of the present utility model, threaded holes 14 are formed on the left and right sides of the first protection frame 1 and the second protection frame 2. The screw part of the locking bolt 8 is threadedly connected to the first protection frame 1 and the second protection frame 2 through the threaded holes 14. Twist the locking bolt 8 to rotate it relative to the assembly plate 6 until the screw part of the locking bolt 8 moves out of the threaded hole 14, and the locking between the assembly plate 6 and the first protection frame 1 and the second protection frame 2 can be released.

[0027] As an alternative technical solution of the utility model, guide plates 15 are fixedly connected to both the front and rear sides of the assembly plate 6. Two guide frames 16 are fixedly connected to the outside of each assembly plate 6. The two guide plates are respectively slidably connected to the two guide frames 16. The sliding fit between the guide plate 15 and the guide frame 16 can prevent the assembly plate 6 from shifting.

[0028] As an alternative technical solution of the utility model, a sealing groove 17 is formed inside the first protective frame 1, and a sealing gasket 18 is fixedly connected to the inside of the second protective frame 2. The sealing gasket 18 is slidably connected to the first protective frame 1 through the sealing groove 17. The arrangement of the sealing gasket 18 can improve the sealing performance between the first protective frame 1 and the second protective frame 2.

[0029] As an alternative technical solution of the utility model, a plurality of clamping plates 19 are fixedly connected to the bottom surface of the sealing frame 9. Clamping grooves 20 are formed on the top surfaces of both the first protective frame 1 and the second protective frame 2. The clamping plates 19 are slidably connected to the first protective frame 1 and the second protective frame 2 through the clamping grooves 20.

[0030] A coil protection structure for an instrument transformer has the following working principle:

[0031] 1): When assembling the instrument transformer, first insert one end of the coil body 4 into the limiting frame 11 inside the first protective frame 1, then connect the coil body 4 to the adapter 10 with a wire, and then cover the second protective frame 2 on the first protective frame 2 until the positioning pin 12 is inserted into the positioning hole 13.

[0032] 2): Insert the assembly plate 6 into both sides of the first protective frame 1 and the second protective frame 2 along the guide frame 16. At this time, the L-shaped locking plate 5 will slide into the locking groove 7. After the clamping plate is completely inserted into the clamping groove 20, use the locking bolt 8 to lock the assembly plate 6, and the rapid assembly of the coil body 4 can be realized.

[0033] 3): When the coil body 4 needs to be repaired, the staff can twist the locking bolt 8 to rotate it relative to the assembly plate 6 until the screw part of the locking bolt 8 moves out of the threaded hole 14, so as to release the locking between the assembly plate 6 and the first protective frame 1 and the second protective frame 2. Then pull up the sealing frame 9 until the assembly plate 6 disengages from the L-shaped locking plate 5, and the locking between the first protective frame 1 and the second protective frame 2 can be released, and the first protective frame 1 and the second protective frame 2 can be quickly disassembled.

[0034] To sum up, the coil protection structure of the transformer, when the transformer needs to be assembled, first insert one end of the coil body 4 into the limit frame 11 inside the first protection frame 1, then use a wire to connect the coil body 4 to the adapter 10, and then cover the second protection frame 2 on the first protection frame 2 until the positioning pin 12 is inserted into the positioning hole 13, and then insert the assembly plate 6 along the guide frame 16 into both sides of the first protection frame 1 and the second protection frame 2. At this time, the L-shaped locking plate 5 will slide into the locking groove 7 until the card plate is fully inserted into the card slot 20, and then use the locking bolt 8 to lock the assembly plate 6 to achieve the coil body 4. It can be assembled quickly and avoids the bolts passing through the two sealing shields, and will not affect the space inside the sealing shields. When the coil body 4 needs to be inspected, the staff can twist the locking bolt 8 to rotate it relative to the assembly plate 6 until the screw portion of the locking bolt 8 moves out of the threaded hole 14, and the lock between the assembly plate 6 and the first protective frame 1 and the second protective frame 2 can be released. Then, the sealing frame 9 is pulled upward until the assembly plate 6 is separated from the L-shaped locking plate 5, and the lock between the first protective frame 1 and the second protective frame 2 can be released. The first protective frame 1 and the second protective frame 2 can be quickly disassembled to expose the coil body 4 for its inspection.

Claims

1. A coil protection structure for an instrument transformer, characterized in that: It includes a vertically arranged first protection frame (1) and a second protection frame (2). The front surface of the first protection frame (1) is attached to the back surface of the second protection frame (2). An inner frame (3) is fixedly connected to the inner wall of the first protection frame (1). One end of the inner frame (3) away from the first protection frame (1) is attached to the inner wall of the second protection frame (2). A coil body (4) is arranged between the first protection frame (1) and the second protection frame (2). L-shaped locking plates (5) are fixedly connected to both the left and right sides of the first protection frame (1) and the second protection frame (2). Assembly plates (6) are slidably connected to both the left and right sides of the first protection frame (1) and the second protection frame (2). A locking groove (7) is formed on the inner side of each assembly plate (6). The assembly plate (6) is slidably connected to the L-shaped locking plate (5) through the locking groove (7). Two locking bolts (8) are threadedly connected to the bottom of each assembly plate (6). The screw parts of the two locking bolts (8) are threadedly connected to the first protection frame (1) and the second protection frame (2) respectively. The tops of the two assembly plates (6) are fixedly connected to a sealing frame (9). The bottom surface of the sealing frame (9) is attached to the first protection frame (1) and the second protection frame (2). Two adapters (10) are fixedly connected to the top of the first protection frame (1). Both of the two adapters (10) are electrically connected to the coil body (4). Both of the two adapters (10) are located inside the sealing frame (9).

2. The coil protection structure of an instrument transformer according to claim 1, characterized in that: Limit frames (11) are fixedly connected to the inner walls of both the first protection frame (1) and the second protection frame (2). The coil body (4) is slidably connected to the limit frame (11).

3. The coil protection structure of an instrument transformer according to claim 2, characterized in that: A positioning pin (12) is fixedly connected to the inner wall of the second protection frame (2). A positioning hole (13) is formed at one end of the inner frame (3) away from the first protection frame (1). The positioning pin (12) is slidably connected to the inner frame (3) through the positioning hole (13).

4. The coil protection structure of an instrument transformer according to claim 3, characterized in that: Threaded holes (14) are formed on both the left and right sides of the first protection frame (1) and the second protection frame (2). The screw part of the locking bolt (8) is threadedly connected to the first protection frame (1) and the second protection frame (2) through the threaded hole (14).

5. The coil protection structure of an instrument transformer according to claim 4, characterized in that: Guide plates (15) are fixedly connected to both the front and back sides of the assembly plate (6). Two guide frames (16) are fixedly connected to the outside of each assembly plate (6). The two guide plates are respectively slidably connected to the two guide frames (16).

6. The coil protection structure of an instrument transformer according to claim 5, wherein: A sealing groove (17) is formed on the inner side of the first protection frame (1). A sealing pad (18) is fixedly connected to the inner side of the second protection frame (2). The sealing pad (18) is slidably connected to the first protection frame (1) through the sealing groove (17).

7. The coil protection structure of an instrument transformer according to claim 6, characterized in that: Several clamping plates (19) are fixedly connected to the bottom surface of the sealing frame (9). Card slots (20) are formed on the top surfaces of both the first protection frame (1) and the second protection frame (2). The clamping plates (19) are slidably connected to the first protection frame (1) and the second protection frame (2) through the card slots (20).

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