Current transformer

Abstract

The utility model discloses a current transformer which comprises a current transformer body and further comprises two sets of supporting seats, mounting holes are formed in the bottom ends of the two sets of supporting seats, the opposite side faces of the two sets of supporting seats are clamped on the outer wall of the current transformer body, holes are formed in the two sets of supporting seats, and screw rods penetrate through the holes. The outer wall of the screw rod is in threaded connection with a nut, and the nut is attached to the outer wall of the supporting seat; a movable block is slidably connected to the outer wall of the supporting seat, and a clamping plate attached to the outer wall of the nut is fixed to the outer wall of the movable block. According to the current transformer, the movable block, the clamping plate, the guide rod, the fixed plate, the spring, the rotating rod, the handle, the rotating plate and the hinge rod are combined for use, the rotating rod, the rotating plate and the hinge rod can be driven to rotate by rotating the handle, so that the movable block and the clamping plate are pushed to move, and the clamping plate abuts against the outer wall of a nut to limit rotation of the nut; and the connection stability of equipment is enhanced, and the risk that the nut falls off is prevented.

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 an instrument that converts the large current on the primary side into the 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 few turns and is connected in series in the circuit of the current to be measured. Therefore, it often has the entire current of the circuit flowing through it. The secondary winding has more turns and is connected in series in 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.

[0003] However, current current transformers are generally installed with a screw and a nut on a mounting base. However, after long-term use, the nut and the screw are prone to rotation and fall off, which affects the connection stability between the nut and the screw, causing the current transformer to easily fall off after installation. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a current transformer, which is used in combination of a movable block, a splint, a guide rod, a fixed plate, a spring, a rotating rod, a handle, a rotating plate and a hinged rod. By rotating the handle, the rotating rod, the rotating plate and the hinged rod can be driven to rotate, thereby pushing the movable block and the splint to move. The splint will contact the outer wall of the nut, thereby limiting the rotation of the nut, thereby enhancing the connection stability of the equipment and preventing the risk of the nut falling off, etc., thereby solving the problems raised by the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a current transformer, comprising a current transformer body, and also comprising two groups of support seats, the bottom ends of the two groups of support seats are provided with mounting holes, the two groups of support seats are clamped on the outer wall of the current transformer body at opposite sides, the two groups of support seats are provided with holes, a screw is passed through the inside of the hole, a nut is threadedly connected to the outer wall of the screw, and the nut is in contact with the outer wall of the support seat;

[0008] The outer wall of the support seat is slidably connected with a movable block, and the outer wall of the movable block is fixed with a clamping plate that fits with the outer wall of the nut.

[0009] Preferably, a fixing plate is fixed to the outer wall of the support seat, and a guide rod inserted into the movable block is fixed to the outer wall of the fixing plate.

[0010] Preferably, a spring is wound around the outer wall of the guide rod, one end of the spring is connected to the movable block, and the other end of the spring is connected to the outer wall of the fixed plate.

[0011] Preferably, the cross section of the clamping plate is V-shaped, and the clamping plate is arranged corresponding to the nut.

[0012] Preferably, the outer wall of the support seat is rotatably connected to a rotating rod, a rotating plate is fixed to the outer wall of the rotating rod, and one end of the rotating plate away from the rotating rod is hinged to the movable block through a hinge rod.

[0013] Preferably, a handle is fixed to one end of the rotating rod away from the supporting seat, and the cross-section of the handle is circular.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. By setting a support base, holes, screws, nuts and mounting holes in combination, the current transformer can be installed and fixed to the support base by inserting the screw into the hole and rotating the nut, so as to achieve an efficient installation effect, enhance the firmness of the connection, and the equipment can be installed through the mounting hole.

[0017] 2. By setting up a movable block, a splint, a guide rod, a fixed plate, a spring, a rotating rod, a handle, a rotating plate and a hinged rod for use in combination, the rotating rod, the rotating plate and the hinged rod can be driven to rotate by rotating the handle, thereby pushing the movable block and the splint to move. The splint will resist the outer wall of the nut, thereby limiting the rotation of the nut, enhancing the connection stability of the equipment and preventing the risk of the nut falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

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

[0020] Figure 3 This is a schematic diagram of the structure of the hinged rod of the utility model;

[0021] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1. current transformer body; 211. support seat; 212. hole; 213. screw; 214. nut; 215. mounting hole; 311. movable block; 312. clamping plate; 313. guide rod; 314. fixing plate; 315. spring; 316. rotating rod; 317. handle; 318. rotating plate; 319. hinged rod. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment

[0025] Refer to Figures 1-4 As shown, a current transformer includes a current transformer main body 1, and further includes two groups of support seats 211. Installation holes 215 are provided at the bottoms of the two groups of support seats 211. One side surface of the two groups of support seats 211 opposite to each other clamps the outer wall of the current transformer main body 1. Through holes 212 are provided in the two groups of support seats 211. A screw rod 213 penetrates through the inside of the through holes 212. A nut 214 is threadedly connected to the outer wall of the screw rod 213. The nut 214 abuts against the outer wall of the support seat 211. By passing the screw rod 213 through the through holes 212 and rotating the nut 214, the screw rod 213 can be locked, so as to lock and reinforce the current transformer main body 1 and the two groups of support seats 211. A movable block 311 is slidably connected to the outer wall of the support seat 211. A clamping plate 312 that abuts against the outer wall of the nut 214 is fixed to the outer wall of the movable block 311. The cross section of the clamping plate 312 is V-shaped. The clamping plate 312 is arranged corresponding to the nut 214. By moving the movable block 311, the clamping plate 312 can be driven to move horizontally. The clamping plate 312 can abut against the outer wall of the nut 214, so as to achieve the purpose of restricting the rotation of the nut 214 and prevent the nut 214 from being accidentally touched and rotated, resulting in the problem that the nut 214 falls off from the screw rod 213.

[0026] A fixing plate 314 is fixed to the outer wall of the support base 211. A guiding rod 313 inserted into the interior of the movable block 311 is fixed to the outer wall of the fixing plate 314. The movable block 311 can move horizontally along the outer wall of the guiding rod 313 to ensure the stability of the movement of the clamping plate 312. A spring 315 is wound around the outer wall of the guiding rod 313. One end of the spring 315 is connected to the movable block 311 and the other end is connected to the outer wall of the fixing plate 314. The spring 315 is provided to achieve a good elastic effect. After the movable block 311 is released, the elastic force of the spring 315 can drive the movable block 311 and the clamping plate 312 to rebound, and ensure that the clamping plate 312 is stably connected to the nut 214. A rotating rod 316 is rotatably connected to the outer wall of the support base 211. A rotating plate 318 is fixed to the outer wall of the rotating rod 316. One end of the rotating plate 318 away from the rotating rod 316 is hinged to the movable block 311 through a hinge rod 319. By rotating the rotating rod 316, the rotating plate 318 and the hinge rod 319 can be driven to rotate, and the movable block 311 and the clamping plate 312 can be stably pushed to move horizontally, so as to achieve the purpose of driving the clamping plates 312 on both the left and right sides to move simultaneously and improving the reinforcement efficiency of the device. A handle 317 is fixed to one end of the rotating rod 316 away from the support base 211. The cross-section of the handle 317 is circular. The handle 317 is provided to facilitate the rotation of the rotating rod 316 and make the operation more comfortable.

[0027] Working principle: When the current transformer main body 1 needs to be installed with the support base 211, by clamping and fitting the two support bases 211 with the current transformer main body 1, then the screw 213 is passed through the hole 212, and the nut 214 is rotated. Under the action of the thread, the two support bases 211 and the current transformer main body 1 can be locked and fixed.

[0028] By rotating the handle 317, the rotating plate 318 and the hinge rod 319 are driven to rotate, and the movable block 311 is pushed to slide along the outer wall of the guiding rod 313. The movable block 311 drives the clamping plate 312 to move. At this time, the spring 315 will be compressed. After the nut 214 and the screw 213 are completely installed, the handle 317 is released. Under the elastic action of the spring 315, the movable block 311 and the clamping plate 312 are driven to rebound, and the clamping plate 312 can clamp and position the nut 214, thereby preventing the nut 214 from rotating and falling off the screw 213.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer, comprising a current transformer body (1), characterized in that: It also comprises two groups of support seats (211), the bottom ends of the two groups of support seats (211) are provided with mounting holes (215), the two groups of support seats (211) are clamped on the outer wall of the current transformer body (1) at opposite sides, the two groups of support seats (211) are provided with holes (212), a screw rod (213) passes through the inside of the hole (212), the outer wall of the screw rod (213) is threadedly connected with a nut (214), and the nut (214) is in contact with the outer wall of the support seat (211); The outer wall of the support seat (211) is slidably connected to a movable block (311), and the outer wall of the movable block (311) is fixed with a clamping plate (312) that fits the outer wall of the nut (214).

2. A current transformer according to claim 1, characterized in that: A fixing plate (314) is fixed to the outer wall of the support seat (211), and a guide rod (313) inserted into the interior of the movable block (311) is fixed to the outer wall of the fixing plate (314).

3. A current transformer according to claim 2, characterized in that: A spring (315) is wound around the outer wall of the guide rod (313), one end of the spring (315) is connected to the movable block (311), and the other end is connected to the outer wall of the fixed plate (314).

4. A current transformer according to claim 1, characterized in that: The cross section of the clamping plate (312) is V-shaped, and the clamping plate (312) is arranged corresponding to the nut (214).

5. A current transformer according to claim 3, characterized in that: The outer wall of the support seat (211) is rotatably connected to a rotating rod (316), and a rotating plate (318) is fixed to the outer wall of the rotating rod (316). One end of the rotating plate (318) away from the rotating rod (316) is hinged to the movable block (311) through a hinge rod (319).

6. A current transformer according to claim 5, characterized in that: A handle (317) is fixed to one end of the rotating rod (316) away from the supporting seat (211), and the cross section of the handle (317) is circular.

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