Low-voltage current transformer fixing support

Abstract

The invention discloses a low-voltage current transformer fixing support, and relates to the field of current transformer matching installation structures, the low-voltage current transformer fixing support comprises a splicing plate and three sets of transformer positioning units, the splicing plate comprises an installation base body and two adjustable base bodies arranged in parallel, the two adjustable base bodies are arranged on the same side of the installation base body, and the three sets of transformer positioning units are arranged on the splicing plate. According to the invention, by arranging the bead screw, after the fixing part at the bottom of the current transformer is placed in the limiting cavity, the steel ball end of the bead screw can automatically extend into the positioning hole at the bottom of the current transformer to realize rapid clamping, the fixing mode is simple and rapid, time and labor are saved, and the working efficiency is improved. In addition, after the current transformer is installed, the bottom of the current transformer presses down and limits the connecting plate, so that the connecting plate cannot be separated from the groove, rapid installation of the wire clamping assembly is achieved, the operation difficulty of installation and disassembly is remarkably reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of current transformer mounting structures, specifically relating to a low-voltage current transformer mounting bracket. Background Technology

[0002] In the field of low-voltage power distribution in power systems, low-voltage current transformers are the core components for current measurement, metering, and protection. The stability of their installation and fixation directly affects the safety of power system operation and the accuracy of data monitoring.

[0003] Currently, current transformers are typically fixed by bolts through the fixing holes at the bottom of the transformer to form a rigid connection with the bracket or cabinet. Bolt fixing and disassembly are not convenient and are not conducive to the maintenance and replacement of the equipment later. In addition, during actual installation, after the wires are inserted into the current transformer, they may deviate from the center position of the transformer or even be close to the inner wall, which will increase the measurement error.

[0004] Therefore, we propose a low-voltage current transformer mounting bracket to solve the above problems. Summary of the Invention

[0005] To address the problems of bolt fixing of current transformers, which hinders future equipment maintenance and replacement, and the increased measurement error caused by wires deviating from the center or even sticking to the inner wall after being inserted into the current transformer during actual installation, this invention provides a low-voltage current transformer fixing bracket.

[0006] The solution adopted by the present invention to solve its technical problem is: a low-voltage current transformer fixing bracket, including a splicing plate and three sets of transformer positioning units. The splicing plate includes a mounting base and two parallel adjustable bases. The two adjustable bases are arranged on the same side of the mounting base. The mounting base and the adjustable base are connected by a sliding connection structure, so that the adjustable base can slide relative to the mounting base. Three sets of current transformer positioning units are respectively disposed on the upper surface of the mounting base and the two adjustable bases. Each current transformer positioning unit includes a positioning seat, a wire clamping assembly and two elastic positioning elements. The positioning seat is fixed on the top of the mounting base or adjustable base, and two lateral limiting walls are provided at intervals on its top. The two lateral limiting walls and the top surface of the positioning seat together form a limiting cavity for accommodating the bottom fixing part of the current transformer. Two elastic positioning elements are respectively installed on the top of the two lateral limiting walls, and their elastic ends can be inserted into the positioning holes at the bottom of the current transformer to achieve quick engagement. The wire clamping assembly is detachably connected to the positioning base for clamping the wires passing through the corresponding current transformer.

[0007] Preferably, the sliding connection structure includes a groove formed on the mounting base and a limiting protrusion disposed on one side of the adjustable base and slidingly engaging with the groove.

[0008] Preferably, each of the two adjustable bases is fixed with a nut at its opposite end, and a positioning screw is connected to the internal thread of the nut. The end of the positioning screw abuts against the inner wall of the slide groove to lock the position of the adjustable base.

[0009] Preferably, the elastic positioning element is a ball screw with its ball end facing the inside of the limiting cavity, for engaging with the positioning hole at the bottom of the current transformer.

[0010] Preferably, the wire clamping assembly includes a connecting plate and a U-shaped wire clamp. The connecting plate is detachably connected to the positioning seat, and a support frame is fixedly connected to the upper surface of the connecting plate. The U-shaped wire clamp is installed on the top of the support frame and is used to clamp the wire.

[0011] Preferably, the U-shaped clamp is made of elastic metal or elastic plastic material.

[0012] Preferably, the top of the positioning seat is provided with a groove, which is located between the two lateral limiting walls. The connecting plate is disposed in the groove and located below the bottom of the current transformer. A baffle is fixedly connected to the end of the connecting plate away from the support frame.

[0013] Preferably, the mounting base is coplanar with the upper surfaces of the two adjustable bases.

[0014] Preferably, the mounting base has two fixing holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by using ball screws, allows the bottom fixing part of the current transformer to be placed into the limiting cavity. The ball end of the ball screw can automatically extend into the positioning hole at the bottom of the current transformer to achieve quick locking. The fixing method is simple and quick, saving time and effort, and facilitating the maintenance and replacement of the current transformer later. Furthermore, after the current transformer is installed, the bottom of the current transformer presses down on the connecting plate to limit its movement, preventing the connecting plate from falling out of the groove. This enables quick installation of the wire clamping assembly, significantly reducing the difficulty of installation and disassembly and improving construction efficiency.

[0016] 2. The present invention connects the mounting base to two adjustable bases through a sliding connection structure. The adjustable bases can slide freely along the grooves of the mounting base, and can be flexibly adjusted according to the size and layout requirements of the cabinet, thereby improving the practicality and versatility of the fixed bracket.

[0017] 3. This invention uses a U-shaped clamp to stably hold the wire passing through the current transformer, keeping the wire at the center of the current transformer and ensuring measurement accuracy.

[0018] 4. The present invention forms a limiting cavity by enclosing two lateral limiting walls with the top surface of the positioning seat, thereby achieving multi-directional limiting of the bottom fixing part of the current transformer. Combined with the vertical snap-fit ​​of the ball screw, the double fixing ensures that the current transformer is not offset or loose after installation.

[0019] 5. The present invention locks the adjusted position of the adjustable base by turning the positioning screw so that the end of the positioning screw abuts against the inner wall of the slide groove. Attached Figure Description

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0021] In the figure: 1 Current transformer, 11 Fixing part, 21 Mounting base, 22 Fixing hole, 23 Adjustable base, 24 Limiting protrusion, 31 Positioning seat, 32 Limiting cavity, 33 Ball screw, 34 Lateral limiting wall, 41 Connecting plate, 42 Baffle, 43 Support frame, 44 U-shaped wire clamp, 51 Nut, 52 Positioning screw. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1-4 This invention provides a technical solution for a low-voltage current transformer mounting bracket: Example 1: according to Figure 1-4 As shown, the assembly includes a composite plate and three sets of current transformer positioning units. The composite plate includes a mounting base 21 and two parallel adjustable bases 23. The mounting base 21 has two fixing holes 22. By passing screws through the fixing holes 22, the entire fixing bracket can be fixedly installed. The upper surfaces of the mounting base 21 and the two adjustable bases 23 are coplanar, and the two adjustable bases 23 are located on the same side of the mounting base 21.

[0024] The mounting base 21 and the adjustable base 23 are connected by a sliding connection structure. The sliding connection structure includes a groove on the mounting base 21 and a limiting protrusion 24 on one side of the adjustable base 23 that slides in cooperation with the groove. This allows the adjustable base 23 to slide relative to the mounting base 21, and can be flexibly adjusted according to the size and layout requirements of the cabinet, thereby improving the practicality and versatility of the fixed bracket.

[0025] Three sets of current transformer positioning units are respectively installed on the upper surface of the mounting base 21 and two adjustable bases 23. Each current transformer positioning unit includes a positioning seat 31, a wire clamping assembly and two elastic positioning elements.

[0026] The positioning seat 31 is fixed on the top of the mounting base 21 or the adjustable base 23. Two lateral limiting walls 34 are provided at intervals on its top. The lateral limiting wall 34 consists of a top wall and two side walls perpendicular to the top wall. The two lateral limiting walls 34 and the top surface of the positioning seat 31 together form a limiting cavity 32 for accommodating the bottom fixing part 11 of the current transformer 1, thereby achieving multi-directional limiting of the bottom fixing part 11 of the current transformer 1.

[0027] The elastic positioning component is a ball screw 33. Threaded holes are provided on the top of both lateral limiting walls 34. The ball screw 33 is threaded into the threaded hole, with its ball end facing the inside of the limiting cavity 32. It is used to cooperate with the positioning hole at the bottom of the current transformer 1 to achieve quick snap-fit. The fixing method is simple and quick, which not only saves time and effort, but also facilitates the maintenance and replacement of the current transformer 1 in the future. Furthermore, the current transformer 1 does not shift or loosen after installation.

[0028] The wire clamping assembly includes a connecting plate 41 and a U-shaped wire clamp 44. The top of the positioning seat 31 has a groove located between two lateral limiting walls 34. The connecting plate 41 is placed in the groove and located below the bottom of the current transformer 1. A baffle plate 42 is fixedly connected to the end of the connecting plate 41 away from the support frame 43. The bottom of the current transformer 1 presses down and limits the connecting plate 41, preventing the connecting plate 41 from falling out of the groove. Furthermore, the connecting plate 41 does not require screw fixation, enabling quick disassembly or installation, thereby significantly reducing the difficulty of installation and disassembly and improving construction efficiency.

[0029] A support frame 43 is fixedly connected to the upper surface of the connecting plate 41. A U-shaped wire clamp 44 is installed on the top of the support frame 43 to clamp the wire passing through the corresponding current transformer 1, so that the wire is in the center position of the current transformer 1 and the measurement accuracy is guaranteed.

[0030] In practical use, the low-voltage current transformer fixing bracket of the present invention first selects a suitable installation position according to the size and layout requirements of the internal space of the distribution cabinet, passes the screws through the two fixing holes 22 on the mounting base 21, and fixes it. Next, adjust the positions of the two adjustable bases 23 according to actual needs, and then put the bottom fixing part 11 of the current transformer 1 into the limiting cavity 32 formed by the two side limiting walls 34 and the top surface of the positioning seat 31. Use the steel ball end of the ball screw 33 to cooperate with the positioning hole at the bottom of the current transformer 1 to achieve quick snap-fit ​​fixation. Then place the wire passing through the current transformer 1 in the U-shaped wire clamp 44 to ensure that the wire is in the center position of the current transformer 1 and to ensure measurement accuracy. Finally, following the steps described above, install and fix the remaining two current transformers 1 in sequence.

[0031] Example 2: Based on Example 1, such as Figure 2 As shown, nuts 51 are fixed at the opposite ends of the two adjustable bases 23. The nuts 51 are internally threaded with positioning screws 52. By screwing the positioning screws 52, the end of the positioning screws 52 abuts against the inner wall of the slide groove, locking the adjusted position of the adjustable bases 23.

[0032] The U-shaped wire clamp 44 is made of elastic metal or elastic plastic material.

Claims

1. A low-voltage current transformer mounting bracket, comprising assembled plates and three sets of transformer positioning units, characterized in that: The assembled panel includes a mounting base and two parallel adjustable bases. The two adjustable bases are located on the same side of the mounting base. The mounting base and the adjustable bases are connected by a sliding connection structure, allowing the adjustable bases to slide relative to the mounting base. Three sets of current transformer positioning units are respectively disposed on the upper surface of the mounting base and the two adjustable bases. Each current transformer positioning unit includes a positioning seat, a wire clamping assembly and two elastic positioning elements. The positioning seat is fixed on the top of the mounting base or adjustable base, and two lateral limiting walls are provided at intervals on its top. The two lateral limiting walls and the top surface of the positioning seat together form a limiting cavity for accommodating the bottom fixing part of the current transformer. Two elastic positioning elements are respectively installed on the top of the two lateral limiting walls, and their elastic ends can be inserted into the positioning holes at the bottom of the current transformer to achieve quick engagement. The wire clamping assembly is detachably connected to the positioning base for clamping the wires passing through the corresponding current transformer.

2. The low-voltage current transformer mounting bracket according to claim 1, characterized in that: The sliding connection structure includes a groove formed on the mounting base and a limiting protrusion disposed on one side of the adjustable base and slidingly engaging with the groove.

3. The low-voltage current transformer mounting bracket according to claim 2, characterized in that: Both adjustable bases are fixed with nuts at their opposite ends. The nuts are internally threaded with positioning screws. The end of the positioning screws abuts against the inner wall of the slide groove to lock the position of the adjustable bases.

4. The low-voltage current transformer mounting bracket according to claim 1, characterized in that: The elastic positioning element is a ball screw with its ball end facing the inside of the limiting cavity, used to cooperate with the positioning hole at the bottom of the current transformer.

5. The low-voltage current transformer mounting bracket according to claim 1, characterized in that: The wire clamping assembly includes a connecting plate and a U-shaped wire clamp. The connecting plate is detachably connected to the positioning seat. A support frame is fixedly connected to the upper surface of the connecting plate. The U-shaped wire clamp is installed on the top of the support frame and is used to clamp the wire.

6. The low-voltage current transformer mounting bracket according to claim 5, characterized in that: The U-shaped clamp is made of elastic metal or elastic plastic material.

7. The low-voltage current transformer mounting bracket according to claim 5, characterized in that: The top of the positioning seat has a groove, which is located between the two lateral limiting walls. The connecting plate is set in the groove and located below the bottom of the current transformer. A baffle is fixedly connected to the end of the connecting plate away from the support frame.

8. The low-voltage current transformer mounting bracket according to claim 1, characterized in that: The mounting base is coplanar with the upper surfaces of the two adjustable bases.

9. The low-voltage current transformer mounting bracket according to claim 1, characterized in that: The mounting base has two fixing holes.

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