A combined current transformer

Abstract

The utility model discloses a combined current transformer, which relates to the technical field of transformers, and includes an upper shell and a lower shell. A bearing on one side of the upper shell is connected to a connecting shaft, a bearing on one side of the connecting shaft is connected to a lower shell, a support block is provided at the lower end of the lower shell, a movable rod is provided on one side of the support block, a moving block is provided on one side of the movable rod, and a connecting block is fixedly connected to one side of the moving block. The utility model enables the lower shell to be connected to the outer shell by providing a support block and a fixed screw, enables the connecting block to be moved and laterally correspond to the connection by providing a moving block and an extension rod, fixes the extension rod by providing a first moving screw, a sliding groove, and a fixing plate, fixes the pull rod by providing a limiting groove, and controls the limiting groove to be combined with the pull rod by providing a first push rod, a movable plate, and a first supporting spring.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a combined current mutual inductor. Background Art

[0002] The current transformer is an instrument that converts the large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. Its primary winding has very few turns and is connected in series in the circuit of the current to be measured.

[0003] Therefore, it often has the entire current of the line flowing through it, the secondary winding has more turns, and is connected in series with the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed, so the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to short circuit. The current transformer converts the large current on the primary side into a small current on the secondary side for measurement, and the secondary side cannot be open.

[0004] At present, the combined current transformer in the prior art usually converts the large current on the primary side into the small current on the secondary side for measurement. When in use, since the transformer needs to be connected with the box for use, the transformer must correspond to the connection of the box, and the box for different purposes changes with the internal equipment, so that the spacing of the connection of the box is different, and the connection between the transformer and the box cannot be accurately matched. There is a problem that the spacing of the lower connection structure of the transformer cannot be adjusted. In addition, when in use, the upper and lower parts of the transformer are fixedly connected by bolts, and the connection time takes a long time. When fixing is required, auxiliary tools are required, and there is a problem that the upper and lower parts of the transformer cannot be fixedly connected conveniently. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the utility model provides a combined current transformer, which solves the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions: comprising an upper shell and a lower shell, one side of the upper shell is connected to a connecting shaft by a bearing, one side of the connecting shaft is connected to a lower shell by a bearing, a support block is arranged at the lower end of the lower shell, a movable rod is arranged at one side of the support block, a moving block is arranged at one side of the movable rod, and one side of the moving block is fixedly connected to a connecting block;

[0009] The movable rod is sleeved with an extension rod inside, one end of the extension rod is fixedly connected to a moving block, the support block is sleeved with a pull rod inside, one end of the pull rod is fixedly connected to the movable rod, a movable groove is provided inside the support block, a movable plate is slidably connected to one side of the movable groove, a limiting groove is provided on one side of the movable plate, one side of the limiting groove is connected to a protrusion at one end of the pull rod, a first push rod is sleeved with one side of the support block, one end of the first push rod is fixedly connected to the movable plate;

[0010] A second movable groove is provided at the upper end of the upper shell, a clamping block is slidably connected to one side of the second movable groove, a first movable groove is provided inside the lower shell, a top block is slidably connected to one side of the first movable groove, a clamping block is slidably connected to one side of the top block, a second push rod is fixedly connected to one side of the clamping block, and the upper shell is inserted into one side of the second push rod.

[0011] Optionally, the other side of the upper shell is in contact with the lower shell, there are transformer windings between the upper shell and the lower shell, the two transformer windings are in contact with each other, one side of the support block is threadedly connected to a fixing screw, and one side of the fixing screw is threadedly connected to the lower shell.

[0012] Optionally, the extension rod is shaped like a concave letter "U", a first support spring is fixedly connected to one side of the movable plate, a first movable screw is connected to a bearing on one side of the movable rod, a fixed plate is threadedly connected to one side of the first movable screw, one side of the fixed plate supports the extension rod, a sliding groove is provided inside the movable rod, and a fixed plate is slidably connected to one side of the sliding groove.

[0013] Optionally, the limiting grooves are distributed in a linear array, the limiting grooves fit closely with the protrusions at the ends of the pull rods, one side of the pull rods contacts the movable plate, a limiting rod is fixedly connected to the inside of the support block, and a movable plate is inserted into one side of the limiting rod.

[0014] Optionally, the second movable groove extends into the lower shell, a second support spring is fixedly connected to one side of the upper shell, a blocking block is fixedly connected to one end of the second support spring, a second support spring is also present inside the lower shell, and the first movable groove is connected to the second movable groove.

[0015] Optionally, there is a groove on one side of the upper shell, the second push rod is located in the groove of the upper shell, a baffle is slidably connected to one side of the upper shell, the baffle covers the groove of the upper shell, the lower end bearing of the lower shell is connected to the second movable screw, and one side of the second movable screw is threadedly connected to a push block.

[0016] The utility model provides a combined current transformer, which has the following beneficial effects:

[0017] 1. The combined current transformer is configured so that the lower shell can be connected to the outer shell by arranging a support block and a fixing screw, and the connecting block is moved to correspond laterally to the connection point by arranging a moving block and an extension rod, and the extension rod is fixed by arranging a first moving screw, a sliding groove, and a fixing plate, and the pull rod is fixed by arranging a limiting groove, and the limiting groove and the pull rod are controlled to be combined by arranging a first push rod, a movable plate, and a first supporting spring.

[0018] 2. The combined current transformer is provided with a second support spring, a clamping block and a top block to fix the upper shell and the lower shell together, a second top rod is provided to separate the clamping block and the top block, a baffle is provided to prevent the second top rod from accidentally touching, and a second movable screw and a first movable groove are provided to adjust the position of the top block so that the top block and the clamping block always maintain a stably connected state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the utility model in front view section;

[0021] Figure 3 For this utility model Figure 2 A schematic diagram of the structure with a partial enlargement at the center;

[0022] Figure 4 It is a structural schematic diagram of the left side section of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the utility model in a top view;

[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0025] In the figure: 1. upper shell; 2. transformer winding; 3. connecting shaft; 4. connecting block; 5. movable rod; 6. movable groove; 7. first supporting spring; 8. limiting rod; 9. fixed plate; 10. first movable screw; 11. slide groove; 12. supporting block; 13. lower shell; 14. movable block; 15. first push rod; 16. fixed screw; 17. clamping block; 18. second movable screw; 19. first movable groove; 20. push block; 21. baffle; 22. second push rod; 23. second movable groove; 24. second supporting spring; 25. pull rod; 26. movable plate; 27. limiting groove; 28. extension rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Example 1

[0028] See also Figures 1 to 6 The utility model provides a technical solution: a combined current transformer, including an upper shell 1 and a lower shell 13, the other side of the upper shell 1 is in contact with the lower shell 13, the upper shell 1 and the lower shell 13 have transformer windings 2, the two transformer windings 2 are in contact with each other, one side of the upper shell 1 is connected to a connecting shaft 3 by a bearing, one side of the connecting shaft 3 is connected to the lower shell 13 by a bearing, the lower end of the lower shell 13 is provided with a support block 12, one side of the support block 12 is threadedly connected to a fixing screw 16, one side of the fixing screw 16 is threadedly connected to the lower shell 13, and the internal fixed connection of the support block 12 is limited A control rod 8 is provided on one side of the support block 12, a movable rod 5 is provided on one side of the movable rod 5, a moving block 14 is fixedly connected to one side of the moving block 14 with a connecting block 4, an extension rod 28 is sleeved inside the movable rod 5, the shape of the extension rod 28 is a concave shape, one end of the extension rod 28 is fixedly connected to the moving block 14, a pull rod 25 is sleeved inside the support block 12, one end of the pull rod 25 is fixedly connected to the movable rod 5, one side of the movable rod 5 is connected to a first movable screw 10 by a bearing, one side of the first movable screw 10 is threadedly connected to a fixed plate 9, one side of the fixed plate 9 supports the extension rod 28, and the movable rod 5 is provided with a slide groove 11 inside, and a fixed plate 9 is slidably connected to one side of the slide groove 11, a movable groove 6 is provided inside the support block 12, and a movable plate 26 is slidably connected to one side of the movable groove 6, and a first support spring 7 is fixedly connected to one side of the movable plate 26, and a movable plate 26 is plugged into one side of the limiting rod 8, and a limiting groove 27 is provided on one side of the movable plate 26, and the limiting grooves 27 are distributed in a linear array, and one side of the limiting groove 27 is connected to a convex block at one end of the pull rod 25, and the limiting groove 27 is closely fitted with the convex block at the end of the pull rod 25, and one side of the pull rod 25 is in contact with the movable plate 26, and the support block 12 is provided with a movable plate 26. A first push rod 15 is sleeved on one side, and one end of the first push rod 15 is fixedly connected to a movable plate 26. By setting a support block 12 and a fixed screw 16, the lower shell 13 can be connected to the outer shell. By setting a movable block 14 and an extension rod 28, the connecting block 4 is moved to correspond laterally to the connection point. By setting a first movable screw 10, a slide groove 11, and a fixed plate 9, the extension rod 28 is fixed. By setting a limiting groove 27, the pull rod 25 is fixed. By setting the first push rod 15, the movable plate 26, and the first support spring 7, the limiting groove 27 is controlled to be combined with the pull rod 25.

[0029] When in use, the connection between the mutual inductor and the shell is matched. When alignment is impossible, the first movable screw 10 is rotated to drive the fixed plate 9 to move in the slide groove 11 to separate it from the extension rod 28, so that the movable block 14 can be pulled to move, so that the connecting block 4 is horizontally matched. After the correspondence is completed, the first movable screw 10 is rotated to make the fixed plate 9 pressurize the extension rod 28 to fix it. When vertical correspondence is impossible, the first push rods 15 on both sides of the support block 12 are pressed to drive the movable plate 26 to move inward through the movable groove 6, so that the protrusion at one end of the pull rod 25 is separated from the limiting groove 27, and the movable rod 5 is pulled outward to match the connecting block 4. After completion, the movable plate 26 is pushed back by the first support spring 7, so that the protrusion of the pull rod 25 is combined with the limiting groove 27 to limit the pull rod 25, thereby achieving the purpose of adjusting the spacing of the lower connecting structure of the mutual inductor.

[0030] Example 2

[0031] See also Figures 1 to 6The utility model provides a technical solution: a combined current transformer, including an upper shell 1 and a lower shell 13, the other side of the upper shell 1 is in contact with the lower shell 13, the upper shell 1 and the lower shell 13 have transformer windings 2, the two transformer windings 2 are in contact with each other, one side of the upper shell 1 is fixedly connected with a second support spring 24, one side of the upper shell 1 has a groove, the lower end bearing of the lower shell 13 is connected with a second moving screw 18, one side bearing of the upper shell 1 is connected with a connecting shaft 3, and one side bearing of the connecting shaft 3 is connected with The lower shell 13 also has a second support spring 24 inside the lower shell 13. The lower end of the lower shell 13 is provided with a support block 12. One side of the support block 12 is threadedly connected with a fixing screw 16. One side of the fixing screw 16 is threadedly connected with the lower shell 13. One side of the support block 12 is provided with a movable rod 5. One side of the movable rod 5 is provided with a moving block 14. One side of the moving block 14 is fixedly connected with a connecting block 4. The upper end of the upper shell 1 is provided with a second moving groove 23. The second moving groove 23 extends into the lower shell 13. A block 17 is slidably connected to one side, one end of the second support spring 24 is fixedly connected to the block 17, a first moving groove 19 is provided inside the lower shell 13, the first moving groove 19 is communicated with the second moving groove 23, a top block 20 is slidably connected to one side of the first moving groove 19, a top block 20 is threadedly connected to one side of the second moving screw 18, a block 17 is slidably connected to one side of the top block 20, a second top rod 22 is fixedly connected to one side of the block 17, the position of the second top rod 22 is in the groove of the upper shell 1, and one side of the upper shell 1 slides A baffle 21 is connected, and the baffle 21 covers the groove of the upper shell 1. The upper shell 1 is inserted on one side of the second push rod 22. By setting the second support spring 24, the block 17, and the push block 20, the upper shell 1 is fixedly connected to the lower shell 13. By setting the second push rod 22, the block 17 and the push block 20 are separated. By setting the baffle 21, the second push rod 22 is prevented from being accidentally touched. By setting the second moving screw 18 and the first moving groove 19, the position of the push block 20 is adjusted, so that the top block 20 and the block 17 always maintain a stably connected connection.

[0032] When in use, the upper shell 1 and the lower shell 13 are docked by the connecting shaft 3, so that the card block 17 is inserted into the lower shell 13, and the card block 17 is pushed by the second support spring 24, so that the lower end of the card block 17 contacts with the top block 20 and fixes it, so that the upper shell 1 and the lower shell 13 are fixed. When it is necessary to open it, the baffle 21 is moved upward, and the second push rod 22 is pressed to push the card block 17 to move in the second moving groove 23, so that it is separated from the top block 20, so as to open it. By setting a baffle 21 to prevent accidental touching of the second push rod 22, the mutual inductor is opened. Each opening and closing will cause friction between the lower end of the card block 17 and the top block 20. Repeated opening and closing for a long time will reduce the fixing effect of the card block 17, so that the upper and lower parts of the mutual inductor shake. The second movable screw 18 is rotated to drive the top block 20 to move downward in the first movable groove 19, thereby adjusting the position of the top block 20 so that the card block 17 and the top block 20 always maintain a stable connection, thereby achieving the purpose of conveniently fixing the upper and lower parts of the mutual inductor.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined current transformer, comprising an upper housing (1) and a lower housing (13), characterized in that: A connecting shaft (3) is connected to one side of the upper shell (1) through a bearing, a lower shell (13) is connected to one side of the connecting shaft (3), a support block (12) is provided at the lower end of the lower shell (13), a movable rod (5) is provided on one side of the support block (12), a moving block (14) is provided on one side of the movable rod (5), and a connecting block (4) is fixedly connected to one side of the moving block (14); The movable rod (5) is sleeved with an extension rod (28) inside, one end of the extension rod (28) is fixedly connected to a moving block (14), the support block (12) is sleeved with a pull rod (25) inside, one end of the pull rod (25) is fixedly connected to the movable rod (5), a movable groove (6) is provided inside the support block (12), one side of the movable groove (6) is slidably connected to a movable plate (26), one side of the movable plate (26) is provided with a limiting groove (27), one side of the limiting groove (27) is connected to a protrusion at one end of the pull rod (25), one side of the support block (12) is sleeved with a first push rod (15), one end of the first push rod (15) is fixedly connected to the movable plate (26); A second movable groove (23) is provided at the upper end of the upper shell (1), and a clamping block (17) is slidably connected to one side of the second movable groove (23); a first movable groove (19) is provided inside the lower shell (13), and a top block (20) is slidably connected to one side of the first movable groove (19), and a clamping block (17) is slidably connected to one side of the top block (20); a second push rod (22) is fixedly connected to one side of the clamping block (17), and the upper shell (1) is plugged into one side of the second push rod (22).

2. A combined current transformer according to claim 1, characterized in that: The other side of the upper shell (1) is in contact with the lower shell (13), and mutual inductor windings (2) are present between the upper shell (1) and the lower shell (13), and the two mutual inductor windings (2) are in contact with each other. One side of the support block (12) is threadedly connected to a fixing screw (16), and one side of the fixing screw (16) is threadedly connected to the lower shell (13).

3. A combined current transformer according to claim 1, characterized in that: The extension rod (28) is in the shape of a concave letter "U", one side of the movable plate (26) is fixedly connected to a first support spring (7), one side of the movable rod (5) is bearing-connected to a first movable screw rod (10), one side of the first movable screw rod (10) is threadedly connected to a fixed plate (9), one side of the fixed plate (9) supports the extension rod (28), a sliding groove (11) is provided inside the movable rod (5), and one side of the sliding groove (11) is slidably connected to the fixed plate (9).

4. A combined current transformer according to claim 1, characterized in that: The limiting grooves (27) are distributed in a linear array, and the limiting grooves (27) are closely matched with the protrusions at the ends of the pull rods (25). One side of the pull rods (25) is in contact with the movable plate (26). The interior of the support block (12) is fixedly connected with a limiting rod (8), and one side of the limiting rod (8) is plugged with the movable plate (26).

5. A combined current transformer according to claim 1, characterized in that: The second movable groove (23) extends into the lower shell (13); a second supporting spring (24) is fixedly connected to one side of the upper shell (1); a clamping block (17) is fixedly connected to one end of the second supporting spring (24); a second supporting spring (24) is also present inside the lower shell (13); and the first movable groove (19) is connected to the second movable groove (23).

6. A combined current transformer according to claim 1, characterized in that: A groove is provided on one side of the upper shell (1), the second push rod (22) is located in the groove of the upper shell (1), a baffle (21) is slidably connected to one side of the upper shell (1), the baffle (21) covers the groove of the upper shell (1), the lower end bearing of the lower shell (13) is connected to the second movable screw (18), and one side of the second movable screw (18) is threadedly connected to a push block (20).

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