Zero sequence current transformer

Abstract

The utility model relates to the related technical field of current transformers, in particular to a zero sequence current transformer, which comprises a current transformer, a mounting mechanism is arranged on the lower surface of the current transformer, and a clamping mechanism is arranged on the surface of one side of the current transformer. According to the zero-sequence current transformer, when the current transformer needs to be installed, the current transformer slides into a groove between an installation block and a handrail, then an anti-skid groove in the installation block is pinched by a hand to drive a check block below the anti-skid groove and the installation block to slide in a sliding groove in an installation plate, and when the check block makes contact with a baffle, the check block can slide in the sliding groove in the installation plate; the telescopic rod moves through the slope on one side, the telescopic rod can slide in the containing groove at the moment, the processes of compressing and resetting the spring can be repeated in the moving process, after the spring reaches a proper position, the plane of the check block and the plane of the baffle enable the spring not to slide downwards, and when the spring needs to be taken out, the telescopic rod continues to move and slide out.

Description

Technical Field

[0001] The utility model relates to the technical field related to current transformers, and in particular to a zero-sequence current transformer. Background Art

[0002] A current transformer is an instrument that converts a large primary current into a small secondary current 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. Therefore, it often has the entire current of the circuit flowing through it. The secondary winding has relatively many 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. Therefore, 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 a short circuit. The current transformer converts a large primary current into a small secondary current for measurement. The secondary side cannot be open-circuited. With the increase in electricity consumption, the use of current transformers has also begun to increase. Therefore, a zero-sequence current transformer is particularly needed.

[0003] However, most of the existing current transformers are installed in the electrical box by bolts, and tools are needed for installation operations during replacement, installation and removal, which results in the problem that the installation process is too cumbersome. Utility Model Content

[0004] The purpose of the utility model is to provide a zero-sequence current transformer to solve the problem that most of the existing current transformers proposed in the above background technology are installed in the electrical box by bolts, and tools are needed for installation operations during replacement, installation and disassembly, which makes the installation process too cumbersome.

[0005] To achieve the above object, the utility model provides the following technical solution: a zero-sequence current transformer, comprising a current transformer, a mounting mechanism is provided on the lower surface of the current transformer, and a clamping mechanism is provided on one side surface of the current transformer;

[0006] The mounting mechanism includes a mounting block, an anti-slip groove, a railing, a receiving groove, a telescopic rod, a spring, a stopper, a mounting plate, a sliding groove and a baffle. The lower surface of the current transformer is fixedly connected with the mounting block, one side surface of the mounting block is provided with an anti-slip groove, one side surface of the mounting block is fixedly connected with the railing, one side surface of the mounting block is provided with a receiving groove, one side surface of the receiving groove is slidably connected with the telescopic rod, the outer side surface of the telescopic rod is sleeved with a spring, one end surface of the spring is fixedly connected with the stopper, the lower surface of the mounting block is slidably connected with the mounting plate, one side surface of the mounting plate is provided with a sliding groove, and one side surface of the sliding groove is fixedly connected with the baffle.

[0007] Preferably, the locking mechanism includes a movable block, a rotating rod, a first receiving hole, a limit rod, a first fixed block, a knob, a fixed rod, a second fixed block and a second receiving hole, one side surface of the current transformer is fixedly connected to the movable block, one side surface of the movable block is rotatably connected to the rotating rod, one side surface of the current transformer is provided with a first receiving hole, one side surface of the current transformer is fixedly connected to the limit rod, one side surface of the current transformer is fixedly connected to the first fixed block, one side surface of the first fixed block is rotatably connected to the knob, one side surface of the knob is fixedly connected to the fixed rod, one side surface of the current transformer is fixedly connected to the second fixed block, and one side surface of the second fixed block is provided with a second receiving hole.

[0008] Preferably, the anti-slip groove is opened symmetrically with respect to the central axis of the mounting block, and the receiving groove is opened symmetrically with respect to the central axis of the mounting block.

[0009] Preferably, the outer surface size of the telescopic rod matches the inner surface size of the storage groove, and the baffle is symmetrically arranged with respect to the central axis of the mounting plate.

[0010] Preferably, the first receiving holes are opened at equal intervals on one side surface of the current transformer, and the limit rods are arranged at equal intervals on one side surface of the current transformer.

[0011] Preferably, the knob and the fixing rod form a rotating structure, and the inner surface size of the second receiving hole matches the outer surface size of the fixing rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are: this zero-sequence current transformer, through the arrangement of the mounting block, anti-slip groove, railing, storage groove, telescopic rod, spring, block, mounting plate, sliding groove and baffle, when the current transformer needs to be installed, the current transformer is slid into the groove between the mounting block and the railing, and then the anti-slip groove on the mounting block is pinched by hand to drive the block below, and the mounting block slides in the sliding groove on the mounting plate, and when the block contacts the baffle, it moves through the slope on one side, and at this time the telescopic rod will slide in the storage groove, and the process of compressing and resetting the spring will be repeated during the movement, and when it reaches the appropriate position, the plane of the block and the baffle prevents it from sliding downward, and when it needs to be taken out, it can continue to move and slide out, thus solving the problem of cumbersome installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the installation block and the anti-skid groove used in conjunction with each other in the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the first receiving hole and the limiting rod cooperating with each other in the utility model;

[0016] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure at point A;

[0017] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure at B.

[0018] In the figure: 1. current transformer; 2. mounting mechanism; 201. mounting block; 202. anti-slip groove; 203. railing; 204. storage groove; 205. telescopic rod; 206. spring; 207. block; 208. mounting plate; 209. sliding groove; 210. baffle; 3. engaging mechanism; 301. movable block; 302. rotating rod; 303. first storage hole; 304. limiting rod; 305. first fixed block; 306. knob; 307. fixed rod; 308. second fixed block; 309. second storage hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 The utility model provides a technical solution: a zero-sequence current transformer, comprising a current transformer 1, a mounting mechanism 2 is provided on the lower surface of the current transformer 1, and a clamping mechanism 3 is provided on one side surface of the current transformer 1;

[0021] The mounting mechanism 2 comprises a mounting block 201, an anti-skid groove 202, a railing 203, a receiving groove 204, a telescopic rod 205, a spring 206, a stopper 207, a mounting plate 208, a sliding groove 209 and a baffle 210. The lower surface of the current transformer 1 is fixedly connected with the mounting block 201, one side surface of the mounting block 201 is provided with an anti-skid groove 202, one side surface of the mounting block 201 is fixedly connected with the railing 203, one side surface of the mounting block 201 is provided with a receiving groove 204, one side surface of the receiving groove 204 is slidably connected with the telescopic rod 205, the outer side surface of the telescopic rod 205 is sleeved with a spring 206, one end surface of the spring 206 is fixedly connected with the stopper 207, the lower surface of the mounting block 201 is slidably connected with the mounting plate 208, one side surface of the mounting plate 208 is provided with a sliding groove 209, one side surface of the sliding groove 209 is fixedly connected with the baffle 210, through the mounting block 201, The anti-skid groove 202, railing 203, storage groove 204, telescopic rod 205, spring 206, block 207, mounting plate 208, sliding groove 209 and baffle 210 are arranged. When the current transformer 1 needs to be installed, the current transformer 1 is slid into the groove between the mounting block 201 and the railing 203, and then the anti-skid groove 202 on the mounting block 201 is pinched by hand to drive the block 207 below, and the mounting block 201 slides in the sliding groove 209 on the mounting plate 208. When the block 207 contacts the baffle 210, it moves through the slope on one side. At this time, the telescopic rod 205 will slide in the storage groove 204, and the process of compressing and resetting the spring 206 will be repeated during the movement. When it reaches the appropriate position, the plane of the block 207 and the baffle 210 prevents it from sliding downward. When it needs to be taken out, it can continue to move and slide out.

[0022] Further, the engaging mechanism 3 includes a movable block 301, a rotating rod 302, a first receiving hole 303, a limiting rod 304, a first fixed block 305, a knob 306, a fixed rod 307, a second fixed block 308 and a second receiving hole 309, one side surface of the current transformer 1 is fixedly connected with the movable block 301, one side surface of the movable block 301 is rotatably connected with the rotating rod 302, one side surface of the current transformer 1 is provided with a first receiving hole 303, one side surface of the current transformer 1 is fixedly connected with the limiting rod 304, one side surface of the current transformer 1 is fixedly connected with the first fixed block 305, one side surface of the first fixed block 305 is rotatably connected with the knob 306, one side surface of the knob 306 is fixedly connected with the fixed rod 307, one side surface of the current transformer 1 is fixedly connected with the second fixed block 30 8. A second receiving hole 309 is provided on one side surface of the second fixed block 308. Through the arrangement of the movable block 301, the rotating rod 302, the first receiving hole 303, the limiting rod 304, the first fixed block 305, the knob 306, the fixing rod 307, the second fixed block 308 and the second receiving hole 309, when the detected cable needs to be inserted, the current transformer 1 is rotated in the movable block 301 through the rotating rod 302 on one side, and then the cable is put in and then reset. At this time, the limiting rod 304 falls into the first receiving hole 303 to prevent the current transformer 1 from being deformed during the rotation process. Then, the knob 306 on the first fixed block 305 is rotated to drive the fixing rod 307, thereby falling into the second receiving hole 309 on one side of the second fixed block 308 to engage.

[0023] Furthermore, the anti-skid groove 202 is symmetrically opened with respect to the central axis of the mounting block 201, and the receiving groove 204 is symmetrically opened with respect to the central axis of the mounting block 201. The anti-skid groove 202 is provided to prevent slipping during the installation process.

[0024] Furthermore, the outer surface size of the telescopic rod 205 matches the inner surface size of the storage groove 204, and the baffle 210 is symmetrically arranged with respect to the central axis of the mounting plate 208. Through the arrangement of the telescopic rod 205, the baffle 207 can be extended and retracted.

[0025] Furthermore, the first receiving holes 303 are opened at equal intervals on one side surface of the current transformer 1, and the limit rods 304 are arranged at equal intervals on one side surface of the current transformer 1. Through the arrangement of the first receiving holes 303, the required detection lines can be easily installed on the current transformer 1.

[0026] Furthermore, the knob 306 and the fixing rod 307 form a rotating structure, and the inner surface size of the second receiving hole 309 matches the outer surface size of the fixing rod 307. Through the setting of the second receiving hole 309, the current transformer 1 can be engaged and fixed.

[0027] Working principle: First, when the current transformer 1 needs to be installed, slide the current transformer 1 into the groove between the mounting block 201 and the railing 203, then pinch the anti-slip groove 202 on the mounting block 201 by hand to drive the block 207 below, and the mounting block 201 slides in the sliding groove 209 on the mounting plate 208. When the block 207 contacts the baffle 210, it moves through the slope on one side. At this time, the telescopic rod 205 slides in the storage groove 204. During the movement, the process of compressing and resetting the spring 206 is repeated. When it reaches the appropriate position, the block The plane of 207 and the baffle 210 prevents it from sliding downward. When it needs to be taken out, it can continue to move and slide out. When the cable to be tested needs to be inserted, the current transformer 1 is rotated in the movable block 301 through the rotating rod 302 on one side, and then the cable is put in and then reset. At this time, the limit rod 304 falls into the first receiving hole 303 to prevent the current transformer 1 from being deformed during the rotation process, and then the knob 306 on the first fixed block 305 is rotated to drive the fixed rod 307, so that it falls into the second receiving hole 309 on the side of the second fixed block 308 to engage.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zero-sequence current transformer, comprising a current transformer (1), characterized in that: A mounting mechanism (2) is provided on the lower surface of the current transformer (1), and a locking mechanism (3) is provided on a side surface of the current transformer (1); The mounting mechanism (2) comprises a mounting block (201), an anti-slip groove (202), a railing (203), a storage groove (204), a telescopic rod (205), a spring (206), a stopper (207), a mounting plate (208), a sliding groove (209) and a baffle (210); the lower surface of the current transformer (1) is fixedly connected to the mounting block (201); a side surface of the mounting block (201) is provided with an anti-slip groove (202); a side surface of the mounting block (201) is fixedly connected to the railing (203); and the mounting block ( A storage groove (204) is provided on one side surface of the storage groove (204), a telescopic rod (205) is slidably connected to one side surface of the storage groove (204), a spring (206) is sleeved on the outer side surface of the telescopic rod (205), a stopper (207) is fixedly connected to one end surface of the spring (206), a mounting plate (208) is slidably connected to the lower surface of the mounting block (201), a sliding groove (209) is provided on one side surface of the mounting plate (208), and a stopper (210) is fixedly connected to one side surface of the sliding groove (209).

2. A zero-sequence current transformer according to claim 1, characterized in that: The engaging mechanism (3) comprises a movable block (301), a rotating rod (302), a first receiving hole (303), a limiting rod (304), a first fixed block (305), a knob (306), a fixed rod (307), a second fixed block (308) and a second receiving hole (309); one side surface of the current transformer (1) is fixedly connected to the movable block (301); one side surface of the movable block (301) is rotatably connected to the rotating rod (302); and one side surface of the current transformer (1) is provided with the first receiving hole (305). 3), a limit rod (304) is fixedly connected to one side surface of the current transformer (1), a first fixed block (305) is fixedly connected to one side surface of the current transformer (1), a knob (306) is rotatably connected to one side surface of the first fixed block (305), a fixed rod (307) is fixedly connected to one side surface of the knob (306), a second fixed block (308) is fixedly connected to one side surface of the current transformer (1), and a second receiving hole (309) is provided on one side surface of the second fixed block (308).

3. A zero-sequence current transformer according to claim 1, characterized in that: The anti-slip groove (202) is opened symmetrically with the central axis of the mounting block (201), and the storage groove (204) is opened symmetrically with the central axis of the mounting block (201).

4. A zero-sequence current transformer according to claim 1, characterized in that: The outer surface size of the telescopic rod (205) matches the inner surface size of the storage groove (204), and the baffle (210) is symmetrically arranged with respect to the central axis of the mounting plate (208).

5. A zero-sequence current transformer according to claim 2, characterized in that: The first receiving holes (303) are opened at equal intervals on a side surface of the current transformer (1), and the limiting rods (304) are arranged at equal intervals on a side surface of the current transformer (1).

6. A zero-sequence current transformer according to claim 2, characterized in that: The knob (306) and the fixing rod (307) form a rotating structure, and the inner surface size of the second receiving hole (309) matches the outer surface size of the fixing rod (307).

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