Current transformer

Abstract

The utility model discloses a current transformer which comprises a transformer shell and a transformer sealing cover hinged to the transformer shell, a clamping piece is fixedly arranged on the transformer sealing cover, a limiting piece is fixedly arranged on the transformer shell, and the clamping piece and the limiting piece are matched to achieve locking of the transformer shell and the transformer sealing cover. The clamping piece comprises an upper mounting block fixedly connected with the mutual inductor sealing cover, a cavity and a sliding groove communicated with the cavity are formed in the upper mounting block, a first elastic piece and a clamping block are movably connected in the cavity, the clamping block is rotationally connected with the connecting rod, and the connecting rod is fixedly connected with the rotary button; the limiting piece comprises a lower mounting block fixedly connected with the mutual inductor shell, a mounting groove is formed in the lower mounting block, a second elastic piece and a check block are movably connected in the mounting groove, and an inclined plane is formed on the check block; according to the utility model, the mutual inductor shell and the mutual inductor sealing cover can be locked without the help of a tool, so that the mutual inductor is convenient to disassemble and assemble during maintenance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photoelectric mutual inductor technical field, concretely is a current transformer. BACKGROUND

[0002] Current transformer is the mutual inductor of application photoelectric technology through optical fiber transmission information to measure big current or high voltage. In high potential (or far) end, the light signal of being modulated by the current or voltage to be measured is transmitted to ground potential (or measurement) end through optical fiber, obtains the current or voltage to be measured through photoelectric conversion and electronic circuit demodulation, according to the working principle of this device, temperature, vibration, displacement and other signals at high potential end can also be measured;

[0003] The conventional current transformer is generally fixed by multiple screws during disassembly and assembly, and thus needs tools for disassembly and assembly, so that the operation is not convenient. UTILITY MODEL CONTENT

[0004] In view of the above situation, the utility model provides a current transformer to effectively solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a current transformer, which comprises a mutual inductor shell and a mutual inductor cover hinged to the mutual inductor shell, a clamping piece is fixedly arranged on the mutual inductor cover, a limiting piece is fixedly arranged on the mutual inductor shell, and the clamping piece and the limiting piece cooperate to lock the mutual inductor shell and the mutual inductor cover.

[0006] The clamping piece comprises an upper mounting block fixedly connected to the mutual inductor cover, a cavity formed in the upper mounting block and a sliding groove in communication with the cavity, a first elastic piece and a clamping block movably connected in the cavity, the clamping block being rotatably connected to a connecting rod, and the connecting rod being fixedly connected to a rotating knob.

[0007] The limiting piece comprises a lower mounting block fixedly connected to the mutual inductor shell, an installation groove formed in the lower mounting block, and a second elastic piece and a blocking block movably connected in the installation groove.

[0008] Preferably, the clamping block comprises a groove block, a connecting block integrated with the groove block, and a stop block integrated with the connecting block; the groove block is slidably connected to the cavity, the connecting block is slidably connected to the sliding groove, and the stop block is used in cooperation with the blocking block.

[0009] Preferably, an inclined portion is formed on the stop block, and the inclined portion is used in cooperation with the inclined surface.

[0010] Preferably, an eccentric wheel is further fixedly connected to the connecting rod, and the eccentric wheel is used in cooperation with the blocking block.

[0011] Preferably, the first elastic member and the second elastic member have the same structure, and both include telescopic springs.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] During work, the transformer housing and the transformer cover can be locked without the help of tools through the provided clamping parts and limit parts. The operation steps are fewer and more convenient. The provided eccentric wheel can be used to release the lock of the transformer housing and the transformer cover by simply turning the knob. It is more convenient and facilitates disassembly and assembly during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0015] In the attached figure:

[0016] Figure 1 This is a schematic diagram of the structure of a current transformer of the utility model;

[0017] Figure 2 This is a schematic diagram of the matching structure of the clamping member and the limiting member of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the clamping member and the limiting member of the utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the clamping block of the present utility model.

[0020] In the figure: 1. Transformer housing; 2. Transformer cover; 3. Clamping piece; 301. Upper mounting block; 302. Cavity; 303. Slide groove; 304. First elastic piece; 305. Clamping block; 3051. Slot block; 3052. Connecting block; 3053. Stop block; 3054. Inclined portion; 306. Connecting rod; 307. Turning knob; 4. Limiting piece; 401. Lower mounting block; 402. Mounting groove; 403. Second elastic piece; 404. Stop block; 405. Inclined surface; 5. Eccentric wheel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Embodiment one, by Figures 1-4 The utility model relates to a current transformer, including transformer casing 1 and with the hinge of transformer casing 1 transformer cover 2, the fixed setting of card joint 3 is established on transformer cover 2, the fixed setting of limiting piece 4 is established on transformer casing 1, and the locking of transformer casing 1 and transformer cover 2 is realized by the cooperation of card joint 3 and limiting piece 4;

[0023] Card joint 3 includes the fixed connection of upper mounting block 301 with transformer cover 2, the inside of upper mounting block 301 forms cavity 302 and the sliding slot 303 of the intercommunication of cavity 302, the inside movable connection of cavity 302 has first elastic piece 304 and card block 305, card block 305 is rotatably connected with connecting rod 306, and connecting rod 306 is fixedly connected with knob 307;

[0024] Limiting piece 4 includes the fixed connection of lower mounting block 401 with transformer casing 1, and the installation slot 402 is seted up in lower mounting block 401, and the movable connection of installation slot 402 has second elastic piece 403 and stop block 404, and the inclined surface 405 is formed on stop block 404;

[0025] In this way, when the locking of transformer casing 1 and transformer cover 2 is needed, only need to press knob 307, and knob 307 drives card block 305 to move through connecting rod 306, and card block 305 moves to the direction close to first elastic piece 304 and extrudes first elastic piece 304, and card block 305 extrudes the inclined surface 405 on stop block 404 in the process of movement and passes through stop block 404, under the elastic force of first elastic piece 304 and the elastic force of second elastic piece 403, stop block 404 stops card block 305, to realize the locking of transformer casing 1 and transformer cover 2, and it is more convenient.

[0026] Card block 305 includes groove block 3051, connecting block 3052 integrally with groove block 3051 and stop block 3053 integrally with connecting block 3052, groove block 3051 is slidably connected with cavity 302, connecting block 3052 is slidably connected with sliding slot 303, and stop block 3053 is used in cooperation with stop block 404.

[0027] The inclined part 3054 is formed on stop block 3053, and the inclined part 3054 is used in cooperation with the inclined surface 405;

[0028] In this way, the movement of card block 305 is more convenient through the cooperation of inclined part 3054 and inclined surface 405.

[0029] Connecting rod 306 is further fixedly connected with eccentric wheel 5, and eccentric wheel 5 is used in cooperation with stop block 404;

[0030] In this way, when the transformer shell 1 is locked with the transformer cover 2, the clamping block 305 is blocked by the block 404 after passing the inclined surface 405. When it is needed to unlock, the knob 307 is rotated, the knob 307 drives the eccentric wheel 5 to rotate through the connecting rod 306, the eccentric wheel 5 extrudes the block 404 in the process of rotation, so that the block 404 is retracted into the installation slot 402, and then the clamping block 305 can be separated from the block 404 under the action of the first elastic member 304, so that the unlocking is realized.

[0031] The first elastic member 304 and the second elastic member 403 are the same in structure and both include a telescopic spring.

Claims

1. A current transformer, comprising a transformer housing (1) and a transformer cover (2) hinged to the transformer housing (1), characterized in that: A clamping member (3) is fixedly provided on the transformer cover (2), and a limiting member (4) is fixedly provided on the transformer housing (1); the clamping member (3) cooperates with the limiting member (4) to achieve locking of the transformer housing (1) and the transformer cover (2); The clamping member (3) includes an upper mounting block (301) fixedly connected to the transformer cover (2); a cavity (302) and a slide groove (303) communicating with the cavity (302) are formed inside the upper mounting block (301); a first elastic member (304) and a clamping block (305) are movably connected inside the cavity (302); the clamping block (305) is rotatably connected to a connecting rod (306), and the connecting rod (306) is fixedly connected to a knob (307); The limiting member (4) comprises a lower mounting block (401) fixedly connected to the transformer housing (1); a mounting groove (402) is provided in the lower mounting block (401); a second elastic member (403) and a stopper (404) are movably connected in the mounting groove (402); and an inclined surface (405) is formed on the stopper (404).

2. A current transformer according to claim 1, characterized in that: The clamping block (305) comprises a slot block (3051), a connecting block (3052) integral with the slot block (3051), and a stop block (3053) integral with the connecting block (3052); the slot block (3051) is slidably connected to the cavity (302), the connecting block (3052) is slidably connected to the slide groove (303), and the stop block (3053) is used in conjunction with the stop block (404).

3. A current transformer according to claim 2, characterized in that: An inclined portion (3054) is formed on the stop block (3053), and the inclined portion (3054) and the inclined surface (405) are used in conjunction with each other.

4. A current transformer according to claim 3, characterized in that: The connecting rod (306) is also fixedly connected to an eccentric wheel (5), which is used in conjunction with the stopper (404).

5. A current transformer according to claim 3, characterized in that: The first elastic member (304) and the second elastic member (403) have the same structure and both comprise telescopic springs.

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