Current transformer

Abstract

The utility model relates to the technical field of current transformers, and discloses a current transformer which comprises a shell and fixing structure parts, a nameplate is fixedly installed at the top end of the shell, a base is fixedly installed at the bottom end of the shell, a fixing structure is inserted into each corner of the base, and each fixing structure comprises a hand-screwing nut. The bottom end of the hand-screwing nut is in threaded connection with a short bolt, a hexagonal nut is fixedly installed at the bottom end of the short bolt, a screw cap is fixedly installed at the bottom end of the hexagonal nut, three clamping shafts are fixedly installed at the bottom end of the screw cap, the hand-screwing nut is sleeved with a center rod, and the short bolt, the hexagonal nut and the screw cap are connected through the same center rod in an inserted mode. A plurality of fixing devices are fixedly installed on the shaft sleeve, and a spring is fixedly installed in the middle of each fixing device. And the current transformer is quickly mounted and dismounted by controlling the expansion degree of the arc rod provided with the threads, so that the current transformer is convenient for a user to use.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a current transformer. Background Art

[0002] The current transformer is based on the principle of electromagnetic induction to change the current. It can convert high-voltage electricity into low-voltage, high-current electricity. At the same time, it can effectively protect equipment and personal safety, and can measure high voltage through proportional conversion. It plays a very critical role in repairing and troubleshooting circuits. In circuit repair and high-voltage circuit measurement, time is the most precious. The longer the installation time, the greater the impact on the life safety of the staff and the normal life of the people. Traditional current transformers are installed through threaded connections, and fixed installation and subsequent disassembly and maintenance are difficult. Therefore, a current transformer is proposed. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the shortcomings of the existing technology, the utility model provides a current transformer with the advantages of fast installation and disassembly, which solves the problem that traditional current transformers are installed by threaded connection, fixed installation and difficult subsequent disassembly and maintenance.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose of fast installation and disassembly, the utility model provides the following technical solutions:

[0007] A current transformer comprises a shell and a fixed structure, wherein a nameplate is fixedly installed on the top of the shell, a base is fixedly installed on the bottom of the shell, and a fixing structure is respectively inserted into each corner of the base, the fixing structure comprises a hand-tightening nut, the bottom end of the hand-tightening nut is threadedly connected to a short bolt, the bottom end of the short bolt is fixedly installed with a hexagonal nut, the bottom end of the hexagonal nut is fixedly installed with a screw cover, and the bottom end of the screw cover is fixedly installed with three clamping shafts, the hand-tightening nut is sleeved with a center rod, the short bolt, the hexagonal nut and the screw cover are inserted into the same center rod, the lower half of the center rod is sleeved with a shaft sleeve, and several fixers are fixedly installed on the shaft sleeve, and a spring is fixedly installed in the middle of each of the fixers, and a total of three arc rods are fixedly installed on the end of all the fixers away from the center rod, and each of the arc rods is fixedly installed with a clamping block, one upper and one lower.

[0008] As a preferred technical solution of the present invention, the shell is a circular ring structure and is made of insulating material, and the base and nameplate are both made of insulating material.

[0009] As an optimal technical solution of the present invention, the hand-tightened nut is a cylindrical structure with a circle of anti-slip strips on the side and an elliptical groove on the bottom, and a thread on the surface of the elliptical groove.

[0010] As an optimal technical solution of the present invention, the surface of the hexagonal nut is provided with a plurality of chamfers, which are welded to the short bolt at the upper end. The three clamping shafts are distributed in a ring at the bottom end of the screw cover, and the distances between any two adjacent clamping shafts are equal.

[0011] As a preferred technical solution of the present invention, the fixtures are distributed in several groups, each group of the fixtures has three fixtures distributed in a ring around the axis of the central rod, and the distance between every two adjacent fixtures in each group is equal. The inner surface of each arc rod is fixed with one fixture from each group, and is distributed parallel to the central rod.

[0012] As a preferred technical solution of the present invention, an arc rod is clamped between the two clamping shafts, and there are three arc rods in total when the three clamping shafts are clamped. The surfaces of the three arc rods are provided with mutually matching threads.

[0013] As an optimal technical solution of the present utility model, the center rod is composed of an elliptical structure, a large cylindrical structure, a small round rod structure, and two triangular structures at the upper and lower ends of the small round rod from top to bottom. The elliptical structure is inserted into groove 1 of the hand-tightening nut, and the large cylindrical part is inserted into the inside of the short bolt.

[0014] As an optimal technical solution of the present invention, the spring is in a force-free balanced state, the clamping block at the upper end of each arc rod is clamped on the triangular structure at the upper end of the center rod, and the clamping block at the lower end of each arc rod is clamped under the triangular structure at the lower end of the center rod, and the triangular structure of the center rod fits together with the three arc rods.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a current transformer with the following beneficial effects:

[0017] The current transformer is provided with a matching fixing structure on the current transformer base, and the fixing structure is provided with an arc rod that can be expanded at will. When installing the current transformer, the arc rod can be expanded and reduced, so the current transformer can be quickly installed and disassembled, which is convenient to use and saves a lot of installation and disassembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the fixed structure of the utility model;

[0020] Figure 3 This is a cutaway diagram of the fixed structure of the utility model;

[0021] Figure 4 This is an exploded view of the fixed structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the middle arc rod and the center rod of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the central rod parts of the utility model;

[0024] Figure 7 This is a structural schematic diagram of a hand-tightened nut in the present utility model.

[0025] In the figure: 1. Housing; 2. Nameplate; 3. Base; 4. Thumb nut; 5. Short bolt; 6. Hexagonal nut; 7. Screw cover; 8. Clamping shaft; 9. Center rod; 10. Bushing; 11. Fixer; 12. Spring; 13. Arc rod; 14. Block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] See also Figure 1A current transformer includes a shell 1 and a fixed structure part. The shell 1 is a circular structure and is made of insulating material. A nameplate 2 is fixedly installed on the top of the shell 1, and a base 3 is fixedly installed on the bottom of the shell 1. The base 3 and the nameplate 2 are both made of insulating material. A fixed structure is inserted into each corner of the base 3.

[0030] See also Figure 2-7The fixing structure includes a hand-tightening nut 4. The hand-tightening nut 4 is a cylindrical structure with a circle of anti-slip strips on the side. The anti-slip strips are more convenient to install and disassemble when twisting the hand-tightening nut 4. An elliptical groove is provided at the bottom, and a thread is provided on the surface of the elliptical groove. The bottom end of the hand-tightening nut 4 is threadedly connected to the short bolt, and a hexagonal nut 6 is fixedly installed at the bottom end of the short bolt. The surface of the hexagonal nut 6 has several chamfers and is welded to the upper short bolt. A screw cap 7 is fixedly installed at the bottom end of the hexagonal nut 6. When the hand-tightening nut 4 is rotated, the hand-tightening nut 4 moves downward, and because the elliptical structure of the center rod 9 is clamped with the hand-tightening nut 4, the center rod 9 is driven to rotate. The bottom end of the screw cap 7 is fixedly installed with three card shafts 8. The function of the card shaft 8 is to ensure that the arc rod 13 does not rotate when the center rod 9 is rotated, and can only expand and shrink sideways. The three card shafts 8 are distributed in an annular manner at the bottom end of the screw cover 7, and the distance between the two adjacent card shafts 8 is equal. There is an arc rod 13 clamped between the two card shafts 8. There are three arc rods 13 clamped in the three card shafts 8. The hand nut 4 is sleeved with the center rod 9. The center rod 9 is composed of an elliptical structure, a large cylindrical structure, a small round rod structure, and two triangular structures at the upper and lower ends of the small round rod from top to bottom. The elliptical structure is inserted into the groove 1 of the hand nut 4, and the large cylindrical part is inserted into the inside of the short bolt 5. The short bolt 5, the hexagonal nut 6 and the screw cover 7 are clamped by the same center rod 9. The lower half of the center rod 9 is connected with a sleeve 10, and a number of fixers 11 are fixedly installed on the sleeve 10. The fixers 11 are distributed in several groups, and each group of fixers 11 has three fixers 11 distributed in a ring around the axis of the center rod 9, and the distance between two adjacent fixers 11 in each group is equal. A spring 12 is fixedly installed in the middle of each fixer 11. The spring 12 is in a state of unforced balance. At this time, the arc rod 13 is in a minimum state. A total of three arc rods 13 are fixedly installed on one end of all fixers 11 away from the center rod 9. The surfaces of the three arc rods 13 are provided with mutually matching threads. The inner surface of each arc rod 13 is fixedly installed with one fixer 11 of each group, and is aligned with the center rod 9. They are distributed in parallel, and each arc rod 13 is fixedly installed with a block 14 on the top and the bottom. The function of the block 14 is to prevent the arc rod 13 from moving up and down, so that it is clamped on the center rod 9 to complete the fixation of the arc rod 13 in the up and down directions. The block 14 at the upper end of each arc rod 13 is clamped on the triangular structure at the upper end of the center rod 9, and the block 14 at the lower end of each arc rod 13 is clamped under the triangular structure at the lower end of the center rod 9. The triangular structure of the center rod 9 fits with the three arc rods 13. When the center rod 9 is rotated, the triangular structure of the center rod 9 will cause the arc rod 13 to expand and shrink during the rotation process. The thickness of the arc rod 13 can be controlled at any time to achieve quick installation and fixation.

[0031] During use, the triangular structure of the center rod 9 fits with the three arc rods 13, and the spring 12 is in a stationary state. When installing, first insert the arc rod 13 area of ​​the fixed structure into the threaded hole opened in the fixed object. Then, because the arc rod 13 is in the smallest state at this time, the arc rod 13 can easily enter the threaded hole. Then adjust the length of the fixed structure inside the threaded hole, twist the hand nut 4, and the center rod 9 rotates to expand the arc rod 13. When it expands to the same size as the threaded hole, twist the square nut to complete the final fixation. Similarly, when disassembling, first twist the hexagonal nut 6 a little bit, and then twist the hand nut 4 to complete the reduction of the arc rod 13. The fixed structure can be taken out directly to complete the disassembly.

[0032] To sum up, the current transformer is provided with a matching fixed structure on the current transformer base 3, and the fixed structure is provided with an arc rod 13 that can be expanded at will. When installing the current transformer, the arc rod 13 can be enlarged and reduced, so the current transformer can be quickly installed and disassembled, which is convenient to use and saves a lot of installation and disassembly time.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer, comprising a housing and a fixed structure, characterized in that: A nameplate is fixedly installed on the top of the shell, a base is fixedly installed on the bottom of the shell, and a fixing structure is respectively inserted into each corner of the base, and the fixing structure includes a hand-tightening nut, a short bolt is threadedly connected to the bottom end of the hand-tightening nut, a hexagonal nut is fixedly installed on the bottom end of the short bolt, a screw cover is fixedly installed on the bottom end of the hexagonal nut, and three clamping shafts are fixedly installed on the bottom end of the screw cover, and the hand-tightening nut is sleeved with a center rod, the short bolt, the hexagonal nut and the screw cover are inserted by the same center rod, and a shaft sleeve is sleeved on the lower half of the center rod, and a number of fixers are fixedly installed on the shaft sleeve, a spring is fixedly installed in the middle of each of the fixers, and three arc rods are fixedly installed on the end of all the fixers away from the center rod, and each of the arc rods is fixedly installed with a clamping block, one above and one below.

2. A current transformer according to claim 1, characterized in that: The shell is a circular ring structure and is made of insulating material. The base and the nameplate are both made of insulating material.

3. A current transformer according to claim 1, characterized in that: The hand-tightening nut is a cylindrical structure, with a circle of anti-slip strips arranged on the side, an elliptical groove one arranged on the bottom, and a thread one arranged on the surface of the elliptical groove one.

4. A current transformer according to claim 1, characterized in that: The surface of the hexagonal nut is provided with a plurality of chamfers, which are welded to the short bolt at the upper end. The three clamping shafts are distributed in an annular manner at the bottom end of the screw cover, and the distances between two adjacent clamping shafts are equal.

5. A current transformer according to claim 1, characterized in that: The fixtures are distributed in several groups, each group of the fixtures has three fixtures distributed in a ring around the axis of the central rod, and the distance between any two adjacent fixtures in each group is equal. A fixture from each group is fixedly installed on the inner surface of each arc rod and is distributed parallel to the central rod.

6. A current transformer according to claim 1, characterized in that: An arc rod is clamped between two of the clamping shafts, and there are three arc rods in total when the three clamping shafts are clamped. Mutually matching threads are provided on the surfaces of the three arc rods.

7. A current transformer according to claim 3, characterized in that: The center rod is composed of an elliptical structure, a large cylindrical structure, a small round rod structure, and two triangular structures at the upper and lower ends of the small round rod from top to bottom. The elliptical structure is inserted into a groove of the hand-tightening nut, and the large cylindrical part is inserted into the short bolt.

8. A current transformer according to claim 7, characterized in that: The spring is in a balanced state without force, the clamping block at the upper end of each arc rod is clamped on the triangular structure at the upper end of the center rod, and the clamping block at the lower end of each arc rod is clamped under the triangular structure at the lower end of the center rod, and the triangular structure of the center rod fits with the three arc rods.

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