Zero sequence mutual inductor fixing device

Abstract

The utility model relates to a zero sequence mutual inductor fixing device, and belongs to the technical field of mutual inductor technology, the zero sequence mutual inductor fixing device comprises a mutual inductor, a mutual inductor upper fixing cushion layer, a mounting block on the cushion layer and a mounting box to realize rapid mounting and fixing, the bottom of a switch cabinet is provided with slide rails in parallel, the slide rails on two sides are provided with a base, and the bottom of the mounting box is fixedly provided with a plurality of bolt pins. The bolt pin penetrates through the limiting hole of the base, a driving assembly used for driving the convex bolt to slide is arranged in the mounting box, the convex bolt penetrates through the side wall of the bolt pin to limit and fix the base, and the zero-sequence mutual inductor has the advantages of achieving mounting and fixing of the zero-sequence mutual inductor in the switch cabinet, being convenient to use and being safe in electricity utilization.

Description

Technical Field

[0001] The present application relates to the technical field of mutual inductor technology, and in particular to a zero-sequence mutual inductor fixing device. Background Art

[0002] At present, the switch cabinet is a kind of electrical equipment, whose main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system; the zero-sequence transformer is installed in the switch cabinet, and when the power system generates zero-sequence grounding current, it is used in conjunction with the relay protection device or signal to activate the device components to achieve protection or monitoring.

[0003] When electric shock or leakage occurs in the circuit, the secondary side of the transformer outputs zero-sequence current, causing the equipment protection on the connected secondary line to take action, such as cutting off power supply, alarming, etc. The zero-sequence transformer is used to detect the unbalanced current in the main circuit loop passing through the transformer. It usually needs to be installed on the bottom plate of the switch cabinet and needs to be fixed with a reliable bracket.

[0004] However, at present, some manufacturers simply fix the zero-sequence transformer in the switch cabinet with bolts, and do not design a sufficiently strong bracket. During the long-term use of the switch cabinet, the zero-sequence transformer is not fixed and the position is easy to shift, resulting in protection failure. In addition, most manufacturers fix the zero-sequence transformer and cable clamp separately in the switch cabinet, which leads to a chaotic layout in the cabinet and is not compact enough. Utility Model Content

[0005] In order to realize the installation and fixation of the zero-sequence transformer in the switch cabinet, which is convenient to use and safe in electricity use, the present application provides a zero-sequence transformer fixing device.

[0006] The zero-sequence transformer fixing device provided in this application adopts the following technical solution:

[0007] A zero-sequence transformer fixing device comprises a transformer and an installation box, wherein the installation box comprises a shell and a pin, a cushion layer is wrapped on the outer wall of the transformer, the cushion layer is detachably connected to the shell, a mounting assembly for quick installation with the cushion layer is arranged on the shell, a base is arranged in a switch cabinet, a pin is fixed at the bottom of the shell, a plurality of pins are arranged, and the plurality of pins are evenly distributed along the bottom surface of the shell, convex pins are symmetrically arranged in the pin, the convex pins penetrate the side wall of the pin and slide relative to the pin, the sliding direction of the convex pins is in the direction of approaching or moving away from the transformer, the pin penetrates the base and the convex pin is limited by the base, and a driving assembly for driving the pin to slide is arranged in the shell.

[0008] By adopting the above technical solution, when the transformer is installed in the switch cabinet, a cushion layer is first wrapped and fixed on the transformer, the transformer and the installation box are installed together, and then the installation box is installed with the base in the switch cabinet, which can reduce damage to the zero-sequence transformer body. When the installation box is installed with the base, the pin at the bottom of the installation box will penetrate the base, and the driving component drives the convex bolt to penetrate the side wall of the pin bolt, thereby limiting the convex bolt and the base, that is, the installation box and the base are installed and fixed. Without affecting the cable threading of the transformer, the position of the cable is reasonably fixed, and the power safety and cleanliness in the switch cabinet can be ensured.

[0009] Optionally, the mounting assembly includes a mounting block, a limit block and a spring. The mounting block is fixedly connected to the cushion layer. Two groups of limit blocks and springs are provided and are axially symmetrically arranged along the center line of the mounting block. A limit groove is horizontally opened in the shell. One end of the spring is fixed to the bottom of the groove, and the other end is fixed to the limit block. When the mounting block abuts against the limit blocks on both sides, the two limit blocks slide away from each other and the spring is in a compressed state.

[0010] By adopting the above technical solution, when installing the mutual inductor and the installation box, it is only necessary to move the installation block fixed on the cushion layer close to the middle position of the two limit blocks. At this time, the two limit blocks slide away from each other, and the spring is in a compressed state. When the limit block and the installation block slide away, the spring returns to its original length. At this time, the limit block limits the installation block, and the installation block and the limit block can be quickly installed, saving manpower consumption for manual installation.

[0011] Optionally, a movable hole is opened on the shell, a toggle rod is fixed on the limit block, and one end of the toggle rod away from the limit block passes through the movable hole and slides in a direction close to or away from the mounting block.

[0012] By adopting the above technical solution, when installing the mounting block and the limit block, if there is a jam or insensitive spring, the toggle lever can be moved to drive the limit block to move to both sides of the mounting block until the mounting block and the limit block are installed. In addition, during disassembly and maintenance, the toggle lever can also be used to move the limit block away from the mounting block to remove the transformer.

[0013] Optionally, the driving assembly includes a threaded rod and a threaded sleeve, the threaded rod is arranged inside the pin and coaxially with the pin, the convex bolts are arranged on both sides of the threaded rod and are symmetrically hinged to the threaded rod, a through hole is horizontally opened on the side wall of the pin, the convex bolt slides in the through hole, the end of the threaded rod away from the convex bolt is threadedly connected to the threaded sleeve, and the threaded sleeve is provided with a first conical tooth for rotating the threaded sleeve.

[0014] By adopting the above technical solution, the first conical tooth drives the threaded sleeve to rotate, and the threaded sleeve is threadedly connected with the threaded rod while rotating. The threaded rod slides in the direction of the through-hole in the pin due to the convex bolt, which limits the tendency of the threaded rod to rotate, so that the threaded rod can only slide in the direction close to or away from the transformer. When the threaded rod slides in the direction away from the transformer, the convex bolt will penetrate the side wall of the pin, that is, the protruding convex bolt will limit the base, thereby realizing the installation of the mounting box and the base.

[0015] Optionally, the first conical tooth is coaxially fixed to the threaded sleeve, a rotating rod is rotatably connected to the shell, a second conical tooth is coaxially fixed to the rotating rod, and the first conical tooth and the second conical tooth are meshed.

[0016] By adopting the above technical solution, the rotating rod is rotated, and the threaded sleeve can be driven to rotate through the engagement of the first conical teeth and the second conical teeth, so that the driving direction can be changed and set in a direction that is convenient for manual construction.

[0017] Optionally, a swivel is coaxially fixed on the threaded sleeve, a transmission chain is provided between two adjacent threaded sleeves, and the transmission chain is meshed with the two adjacent swivels for transmission.

[0018] By adopting the above technical solution, it is only necessary to install a rotating rod and a second conical tooth on one side of the installation box for driving, so that the two threaded sleeves on the same side can be driven to rotate at the same time, thereby driving the convex bolts in the two pins on the same side to move at the same time, which is not only convenient for driving, but also conducive to maintaining the balance of the two sides of the installation box.

[0019] Optionally, slide rails are symmetrically fixed on both sides of the bottom of the switch cabinet, and sliders are symmetrically fixed on the base. The sliders slide in the slide rails along the length direction of the slide rails, and bolts for limiting the sliders are provided on the base.

[0020] By adopting the above technical solution, the slider can move in the slide rail, that is, the transformer can be moved in the switch cabinet, and can be adjusted in real time according to the actual location of the cable line without affecting the installation and fixation of the transformer itself, and it is also convenient to keep the switch cabinet clean.

[0021] Optionally, an end of the installation box close to the transformer is provided with an arc that fits the shape of the transformer.

[0022] By adopting the above technical solution, the position where the installation box and the mutual inductor are close to each other is set to an arc, which can not only better stabilize and fix the mutual inductor, but also reduce the gap between the mutual inductor and the installation box, thereby reducing the possibility of garbage accumulation.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The positioning of the installation block and the limit block can realize the rapid installation of the transformer and the installation box, and at the same time reduce the wear on the transformer body;

[0025] 2. Rotate the rotating rod, the first conical teeth and the second conical teeth engage, which can drive the threaded sleeve to rotate. The threaded sleeve rotates and drives the threaded rod to move away from the transformer. At the same time, the convex bolt penetrates the pin bolt to limit the installation box and the base, so that the transformer can be fixed in the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 It is a schematic diagram showing the cross-sectional structure of the shell;

[0028] Figure 3 This is a schematic diagram showing the linkage structure of two pins on the same side;

[0029] Figure 4 This is a schematic diagram showing the cross-sectional structure of the pin.

[0030] In the figure, 1, mutual inductor; 11, cushion layer; 2, mounting box; 21, shell; 211, limiting groove; 212, movable hole; 22, pin; 221, through hole; 222, convex bolt; 3, mounting assembly; 31, mounting block; 32, limiting block; 33, spring; 34, toggle rod; 4, driving assembly; 41, threaded rod; 42, threaded sleeve; 5, first conical teeth; 51, second conical teeth; 52, rotating rod; 53, turning handle; 6, swivel; 61, conveyor chain; 7, base; 71, limiting hole; 72, bolt; 8, slide rail. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0032] An embodiment of the present application discloses a zero-sequence transformer fixing device.

[0033] refer to Figure 1 A zero-sequence transformer 1 fixing device includes a transformer 1 and an installation box 2. The transformer 1 is usually arranged at the bottom of the switch cabinet. The transformer 1 itself is in a circular ring shape. First, an insulating cushion layer 11 is fixed on the transformer 1, and then the cushion layer 11 and the installation box 2 are installed together. The top of the installation box 2 is set to an arc shape that matches the transformer 1. It can not only better fix the transformer 1 and minimize the damage to the transformer 1 body, but also reduce the gap between the transformer 1 and the installation box 2 to prevent garbage accumulation.

[0034] Slide rails 8 are fixed in parallel on two opposite sides of the bottom of the switch cabinet, a base 7 is provided at the bottom of the mounting box 2, the base 7 is provided with bends and grooves, sliders are symmetrically fixed at both ends of the base 7, the sliders are T-shaped, which can prevent the sliders from falling off the slide rails 8, the sliders slide in the slide rails 8 along the length direction of the slide rails 8, and tightening bolts 72 are provided on the base 7. By sliding the slider in the slide rails 8, the position of the mutual inductor 1 in the switch cabinet can be adjusted to better meet the threading requirements of the cable.

[0035] refer to Figure 2 The mounting box 2 includes a shell 21 and a pin 22. Four pins 22 are arranged and are evenly and symmetrically distributed at the bottom of the shell 21. A mounting assembly 3 is arranged between the cushion layer 11 and the shell 21. The mounting assembly 3 includes a mounting block 31, a limit block 32 and a spring 33. The mounting block 31 is fixedly connected to the cushion layer 11. The mounting block 31 is T-shaped. The end of the limit block 32 facing the mounting block 31 is trapezoidal, and the inclined end of the trapezoid faces the transformer 1. The limit block 32 and the spring 33 are each arranged in two groups and are axially symmetrically arranged along the center line of the mounting block 31. A limit groove 211 is horizontally opened in the shell 21. One end of the spring 33 is fixed to the bottom of the groove, and the other end is fixed to the limit block 32. The limit block 32 is in the limit groove 211 along the direction close to or away from the mounting block 31. When the mounting block 31 is in contact with the chamfered surfaces of the limit blocks 32 on both sides, the two limit blocks 32 slide in the direction away from each other. At this time, the spring 33 is in a compressed state. When the mounting block 31 completely slides away from the chamfered surfaces of the limit blocks 32, the limit blocks 32 will be limited by the groove part of the mounting block 31, so that the mounting block 31 and the limit blocks 32 can be quickly installed. In addition, a movable hole 212 is horizontally opened on the shell 21, and a toggle rod 34 is fixed on the limit block 32. The toggle rod 34 passes through the movable hole 212, which can drive the limit block 32 to slide in the direction close to or away from the mounting block 31. If the limit block 32 is stuck or needs to be disassembled for maintenance, the toggle rod 34 can be manually toggled to achieve the installation and disassembly of the shell 21 and the transformer 1.

[0036] refer to Figure 3 and Figure 4, four convex bolts 222 are symmetrically arranged in the pin 22, and the four convex bolts 222 are spaced apart in pairs in the direction away from the mutual inductor 1, and are axially symmetrically distributed along the center of the pin 22, and an oblique through-hole 221 is horizontally opened on the side wall of the pin 22, and the convex bolts 222 slide in the through-hole 221, and a driving assembly 4 is arranged in the housing 21, and the driving assembly 4 includes a threaded rod 41 and a threaded sleeve 42, the threaded rod 41 is arranged inside the pin 22 and is coaxially arranged with the pin 22, and a plurality of convex bolts 222 are respectively arranged on both sides of the threaded rod 41 and are hinged with the threaded rod 41, and one end of the threaded rod 41 away from the convex bolt 222 is threadedly connected with the threaded sleeve 42, and a first conical tooth 5 and a swivel 6 are coaxially fixed on the threaded sleeve 42, and a rotating rod 52 is rotatably connected to the housing 21, and a second conical tooth 51 is coaxially fixed on the rotating rod 52, and the second conical tooth 51 is coaxially fixed with the first conical tooth 51. A conical tooth 5 is meshed, and a turning handle 53 is fixed to the end of the turning rod 52 away from the second conical tooth 51. A transmission chain 61 is connected to the rotating rings 6 on the two adjacent threaded sleeves 42 on the same side. By turning the turning handle 53, the turning rod 52 drives the second conical tooth 51 to mesh with the first conical tooth 5. The rotation of the first conical tooth 5 drives the threaded sleeve 42 to rotate. The threaded sleeve 42 is threadedly connected to the threaded rod 41 and moves toward the end away from the mutual inductor 1 at the same time, so as to drive the convex bolt 222 to pass through the side wall of the pin bolt 22 to slide. When installing the mounting box 2 and the base 7, a limiting hole 71 is provided on the base 7, and the pin bolt 22 is passed through the limiting hole 71. At the same time, the bending groove of the base 7 stabilizes the shell 21. At this time, the convex bolt 222 is driven to extend out of the pin bolt 22, so as to realize the limiting of the base 7 by the shell 21, and the limiting distance between the shell 21 and the base 7 can also be adjusted.

[0037] The implementation principle of a zero-sequence transformer 1 fixing device in an embodiment of the present application is as follows: first, a cushion layer 11 is fixed on the transformer 1, and then the mounting block 31 and the limit block 32 are installed and fixed, and the base 7 is set in the slide rail 8 of the switch cabinet for sliding. The pin 22 passes through the limit hole 71 of the base 7 to drive the rotating rod 52 to rotate, thereby realizing the rotation of the threaded sleeve 42, that is, realizing the driving of the convex bolt 222 by the threaded rod 41, and the convex bolt 222 passes through the side wall of the pin 22, so that the shell 21 and the base 7 can be limited and fixed.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A zero-sequence mutual inductor (1) fixing device, comprising a mutual inductor (1), Features: The switch cabinet also includes an installation box (2), the installation box (2) includes a shell (21) and a pin (22), the outer wall of the mutual inductor (1) is wrapped with a cushion layer (11), the cushion layer (11) and the shell (21) are detachably connected, and the shell (21) is provided with an installation component (3) for quick installation with the cushion layer (11), a base (7) is provided in the switch cabinet, and the pin (22) is fixed to the bottom of the shell (21), and the pin (22) is provided with a plurality of pins (22). ) are evenly distributed along the bottom surface of the housing (21); convex bolts (222) are symmetrically arranged in the pin bolt (22); the convex bolts (222) penetrate the side wall of the pin bolt (22) and slide relative to the pin bolt (22); the sliding direction of the convex bolt (222) is in a direction approaching or moving away from the mutual inductor (1); the pin bolt (22) penetrates the base (7) and the convex bolt (222) is limited by the base (7); and a driving component (4) for driving the pin bolt (22) to slide is arranged in the housing (21).

2. A zero-sequence transformer (1) fixing device according to claim 1, Features: The mounting assembly (3) comprises a mounting block (31), a limiting block (32) and a spring (33); the mounting block (31) is fixedly connected to the cushion layer (11); two groups of the limiting blocks (32) and the spring (33) are provided and are axially symmetrically arranged along the center line of the mounting block (31); a limiting groove (211) is horizontally provided in the housing (21); one end of the spring (33) is fixed to the bottom of the groove and the other end is fixed to the limiting block (32); when the mounting block (31) abuts against the limiting blocks (32) on both sides, the two limiting blocks (32) slide in a direction away from each other and the spring (33) is in a compressed state.

3. A zero-sequence transformer (1) fixing device according to claim 2, Features: The housing (21) is provided with a movable hole (212), a toggle rod (34) is fixed on the limit block (32), and one end of the toggle rod (34) away from the limit block (32) passes through the movable hole (212) and slides in a direction approaching or away from the mounting block (31).

4. A zero-sequence transformer (1) fixing device according to claim 1, Features: The driving assembly (4) comprises a threaded rod (41) and a threaded sleeve (42); the threaded rod (41) is arranged inside the pin (22) and is coaxially arranged with the pin (22); convex bolts (222) are arranged on both sides of the threaded rod (41) and are symmetrically hinged with the threaded rod (41); a through hole (221) is horizontally opened on the side wall of the pin (22); the convex bolt (222) slides in the through hole (221); one end of the threaded rod (41) away from the convex bolt (222) is threadedly connected to the threaded sleeve (42); and the threaded sleeve (42) is provided with a first conical tooth (5) for rotating the threaded sleeve (42).

5. A zero-sequence transformer (1) fixing device according to claim 4, Features: The first conical teeth (5) are coaxially fixed to the threaded sleeve (42); a rotating rod (52) is rotatably connected to the housing (21); a second conical tooth (51) is coaxially fixed to the rotating rod (52); and the first conical teeth (5) and the second conical teeth (51) are meshed.

6. A zero-sequence transformer (1) fixing device according to claim 5, Features: A rotating ring (6) is coaxially fixed on the threaded sleeve (42), a transmission chain (61) is arranged between two adjacent threaded sleeves (42), and the transmission chain (61) is meshed with the two adjacent rotating rings (6) for transmission.

7. A zero-sequence transformer (1) fixing device according to claim 1, Features: Slide rails (8) are symmetrically fixed on both sides of the bottom of the switch cabinet, and sliders are symmetrically fixed on the base (7). The sliders slide in the slide rails (8) along the length direction of the slide rails (8), and bolts (72) for limiting the sliders are arranged on the base (7).

8. A zero-sequence transformer (1) fixing device according to claim 1, Features: One end of the installation box (2) close to the transformer (1) is provided with an arc that fits the shape of the transformer (1).

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