High-voltage grounding device

Abstract

The utility model is suitable for the technical field of conductive grounding connection, and provides a high-voltage grounding device, which comprises a base provided with a wire contact plate. The wire contact plate comprises a long connecting strip and a plurality of contact parts fixedly connected to one side or two sides of the connecting strip; a contact groove is formed in the top of the contact part, a fixing screw hole is formed in the center of the contact groove, a plurality of threaded holes are formed in the base, the threaded holes and the fixing screw hole are arranged in a one-to-one correspondence mode, and fixing bolts are connected into the threaded holes and the fixing screw hole in a threaded mode; a grid plate is mounted at the top of the wire contact plate. Therefore, the device can ensure good grounding connection of the grounding connecting line of the high-voltage equipment, prevents fire caused by poor conductivity of the terminal and the joint of the PE line of the equipment, and solves the problem of reliability of grounding connection of electric appliances.

Description

Technical Field

[0001] The utility model is applicable to the technical field of conductive grounding connection and provides a high-voltage grounding device. Background Art

[0002] The grounding device refers to the general term for the connecting wire or equipment between the motor and the grounding electrode buried underground. The grounding device is also called the grounding integrated device: a device that establishes an electrical connection between electrical equipment or other objects and the ground.

[0003] Generally, fires caused by short circuits in high-voltage equipment are caused by high temperatures or arcs generated by the short-circuit current acting on the line, while ground fault fires have a variety of causes. Among them, fault current fires are caused by the metal at the short-circuit point being welded. This process can be quickly cut off by protective electrical appliances such as fuses or low-voltage circuit breakers to prevent fires.

[0004] If the TN system PE line is poorly connected or the terminals and connectors of the PE line are poorly conductive, it will not be noticed because it will not affect the operation of the equipment. Once a fault occurs, the resistance of the terminals and connectors will increase due to the poor contact, resulting in high-impedance sparks or arcs. The increase in contact resistance and the high resistance of the arc limit the fault current, so that the overcurrent protection device cannot be activated in time, causing a fire. In addition, when the exposed conductive part of the electrical device is subject to a ground fault voltage, and the equipment grounding connection is poor, this voltage is transmitted along the PE line and PEN line, so that all the exposed conductive parts of the electrical device are subject to ground voltage, which can easily cause insulation breakdown and fire. Therefore, a high-voltage grounding device is still needed to solve the problem of reliability of electrical grounding connection. Utility Model Content

[0005] In view of the above-mentioned defects, the purpose of the utility model is to provide a high-voltage grounding device, the purpose is to solve the problems raised in the background technology, the device includes a base, and a contact plate is installed on the base; the contact plate includes a long connecting strip and a plurality of contact parts fixedly connected to one side or both sides of the connecting strip; a contact groove is provided on the top of the contact part, and a fixing screw hole is provided at the center of the contact groove; a plurality of threaded holes are provided on the base, and the threaded holes are arranged one by one corresponding to the fixing screw holes, and the threaded holes and the fixing screw holes are threadedly connected with fixing bolts; a grid plate is installed on the top of the contact plate.

[0006] Furthermore, a fitting portion is provided between the top surface of the contact portion and the bottom of the contact groove, and the fitting portion is a curved surface.

[0007] Furthermore, the fixing bolt includes a bolt head and a bolt column fixedly connected to the bottom of the bolt head, and the bottom surface of the bolt head has a taper.

[0008] Furthermore, the base is provided with a plurality of wire grooves, and the wire grooves are arranged corresponding to the contact parts.

[0009] Furthermore, a wire fixing slot cover plate is installed on the top of the base.

[0010] Furthermore, a lower wire clamping groove is provided on the bottom surface of the wire trough, and a plurality of wire clamping posts are installed on the bottom of the wire fixing trough cover plate, and the wire clamping posts are arranged corresponding to the wire trough; an upper wire clamping groove is provided at the bottom of the wire clamping posts.

[0011] Furthermore, an openable and closable wiring row cover is installed on the grid plate.

[0012] Furthermore, the wiring row cover plate is hinged to one end of the grid plate through a hinge point.

[0013] Furthermore, a first magnetic sheet is installed at one end of the wiring row cover away from the hinge point, and a second magnetic sheet is installed at one end of the grid top away from the hinge point, and the first magnetic sheet and the second magnetic sheet are arranged correspondingly.

[0014] Furthermore, fixing parts are installed on both sides of the bottom of the base.

[0015] Therefore, in actual use, the installer can connect the grounding device bolts to the inside or other positions of the grounding connection box through the fixing part on the base, open the fixed wire slot cover and the terminal block cover, use wire strippers to strip the PE wire of the equipment to be connected, the grounding connection wire, or the total equipotential connection wire, bend the exposed metal wire head into a "J" shape, wrap it around the bolt column of the fixing bolt, use a screwdriver to screw the fixing bolt into the fixing screw hole and the threaded hole, and tighten it with force. In this process, the tapered part of the bottom surface of the bolt head presses down the exposed metal part of the wire, and the contact part with the contact groove is tightly fitted with the exposed metal part of the wire through the fitting part, and the concave arc surface of the fitting part contacts the arc surface of the wire, so that the contact area is increased. At the same time, in this process, the fixing bolt abuts against the grounding connection wire and is threadedly connected to the contact part through the fixing screw hole, which can also achieve the effect of further increasing the contact area, and can better achieve a good electrical connection between the wire and the grounding device.

[0016] Then, place the lead wire inside the wire trough and install the wire trough cover. During the installation process, the wire clamping column at the bottom of the wire trough cover is inserted downward into the wire trough, and then the wire trough cover and the base are fixed with bolts. During the process, the upper clamping wire trough is pressed down to hold the wire together with the lower clamping wire trough to prevent the wire from shaking and loosening. Finally, the installer covers the terminal block cover, and the first magnetic sheet and the second magnetic sheet attract each other to close the cover tightly, completing the installation of the grounding device.

[0017] Therefore, the device can ensure good grounding connection of the grounding connection line of the high-voltage equipment, prevent fire caused by poor conductivity of the terminals and connectors of the equipment PE line, and solve the reliability problem of the grounding connection of the electrical appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the high voltage grounding device;

[0019] Figure 2 It is a side view of the high voltage grounding device;

[0020] Figure 3 It is a side view of the cable duct cover;

[0021] Figure 4 It is a top view of the high voltage grounding device in the first state;

[0022] Figure 5 This is a schematic diagram of the wiring strip cover structure;

[0023] Figure 6 is a top view of the high voltage grounding device in the second state;

[0024] Figure 7 It is a schematic diagram of the contact plate structure;

[0025] Figure 8 is a side sectional view of the wiring unit;

[0026] Fig. 9 for Figure 8 A magnified view of part A;

[0027] Fig.10 It is a schematic diagram of the fixing bolt structure;

[0028] In the figure: 01-conductor; 1-base; 101-wire slot; 102-lower wire slot; 103-threaded hole; 11-fixing part; 12-hinge point; 13-terminal block cover; 131-first magnetic sheet; 14-fixed wire slot cover; 141-wire post; 142-upper wire slot; 15-wire outlet hole; 2-contact plate; 21-contact part; 210-fitting part; 211-contact groove; 212-fixing screw hole; 3-grid; 31-second magnetic sheet; 4-fixing bolt; 41-bolt head; 42-bolt post. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] See also Figure 1-9The purpose of the utility model is to provide a high voltage grounding device, including a base 1 located at the bottom, and a contact plate 2 is fixedly connected to the base 1 by bolts; specifically, a recessed portion with the same shape as the contact plate 2 is provided on the top of the base 1, and the contact plate 2 can be installed in the recessed portion on the top of the base 1, and the contact plate 2 and the base 1 are fixedly connected by bolts through the corresponding screw holes on the contact plate 2 and the base 1. The contact plate 2 includes a long connecting strip 22, and a plurality of contact portions 21 are provided on one side or both sides of the connecting strip 22. Specifically, the contact plate 2 is a metal component with good conductive performance. In this embodiment, a plurality of contact portions 21 are equidistantly distributed on both sides of the connecting strip 22, and the contact portions 21 on both sides of the connecting strip 22 are symmetrically arranged. The contact portion 21 is responsible for contacting the power conductor of the high voltage equipment, and the contact plate 2 connects a plurality of contact portions 21 to make the potentials of the plurality of contact portions 21 equal.

[0031] A contact groove 211 is provided at the top of the contact portion 21, and a fixing screw hole 212 is provided at the center of the contact groove 211. A plurality of threaded holes 103 are provided on the base 1, and the threaded holes 103 and the fixing screw holes 212 are arranged one by one, and the threaded holes 103 and the fixing screw holes 212 are threadedly connected with fixing bolts 4. The fixing bolts 4 play a role in fixing the exposed part of the conductor 01; the fixing bolts 4 are threadedly connected in the threaded holes 103 and the fixing screw holes 212 arranged correspondingly above and below, and the installer can use a tool to rotate and loosen the fixing bolts 4, and bend the metal exposed part of the grounding wire into a "J" shape, and the bent part is crimped between the fixing bolts 4 and the contact portion 21.

[0032] A grid plate 3 is installed on the top of the contact plate 2. Specifically, the grid plate 3 is fixedly connected to the base 1 by bolts, and the grid plate 3 is arranged on the top of the contact plate 2; the grid plate 3 separates the contact parts 21 of the contact plate 2 from each other to form a plurality of independent wiring units.

[0033] As an embodiment of the present technical solution, Fig. 9 , 10 As shown, a fitting portion 210 is provided between the top surface of the contact portion 21 and the bottom of the contact groove 211, and the fitting portion 210 is an arc surface. Specifically, the fitting portion 210 is a concave arc surface between the top surface of the contact portion 21 and the bottom of the contact groove 211. The fixing bolt 4 includes a bolt head 41 and a bolt column 42 fixedly connected to the bottom of the bolt head 41, and the bottom surface of the bolt head 41 has a taper. After the exposed metal portion of the wire 01 is bent, it is wrapped around the outer periphery of the bolt column 42, and the fixing bolt 4 is gradually tightened at this time. Since the bottom surface of the bolt head 41 has a taper, the exposed metal portion gradually expands outward while the fixing bolt 4 is gradually tightened, and is in close contact with the fitting portion 210. The concave arc surface of the fitting portion 210 is in contact with the arc surface of the wire 01, so that the contact area is increased.

[0034] As an embodiment of the present technical solution, Figure 1 , 2 As shown in Figures 4 and 5, an openable terminal strip cover 13 is installed on the grid plate 3; specifically, the terminal strip cover 13 is hinged to one end of the grid plate 3 through a hinge point 12, and the terminal strip cover 13 can be rotated around the hinge point 12 to open and close. A first magnetic sheet 131 is installed at one end of the terminal strip cover 13 away from the hinge point 12, and a second magnetic sheet 31 is installed at one end of the top of the grid plate 3 away from the hinge point 12, and the first magnetic sheet 131 and the second magnetic sheet 31 are arranged correspondingly. When the terminal strip cover 13 is closed, the first magnetic sheet 131 and the second magnetic sheet 31 attract each other to close the cover tightly. When the terminal strip cover 13 needs to be opened, the magnetically closed terminal strip cover 13 can be easily opened by the installer.

[0035] As an embodiment of the present technical solution, Figure 1 , 3 As shown in FIG. 4 , the base 1 is provided with a plurality of wire grooves 101, and the wire grooves 101 are provided corresponding to the contact portions 21; specifically, the wire grooves 101 are provided as shown in FIG. Figure 4 The middle grid plate 3 is provided with two sides along the width direction, and each wire slot 101 corresponds to a wiring unit. When the grounding wire is installed on the wiring unit, the grounding wire can be led out to the outside of the grounding device through the wire slot 101, so that the wire output and wire arrangement are more regular. The bottom surface of the wire slot 101 is provided with a lower clamping wire slot 102, which is an arc surface and concave downward; the top of the base 1 is detachably connected with a fixed wire slot cover plate 14, and specifically, the fixed wire slot cover plate 14 is connected to the base 1 by bolts. A plurality of wire clamping posts 141 are fixedly connected to the bottom of the wire trough cover plate 14, and the wire clamping posts 141 are arranged corresponding to the wire trough 101; when installing the wire trough cover plate 14, the wire clamping posts 141 at the bottom of the wire trough cover plate 14 can be inserted downward into the wire trough 101, and then the wire trough cover plate 14 and the base 1 are connected using bolts; an upper wire clamping trough 142 is arranged at the bottom of the wire clamping post 141, and after the wire trough cover plate 14 is installed, the upper wire clamping trough 142 and the lower wire clamping trough 102 embrace the wire 01 to prevent the wire 01 from shaking and loosening.

[0036] As an embodiment of the present technical solution, Figure 1 , 2 As shown, fixing parts 11 are fixedly connected to both sides of the bottom of the base 1. A through hole is provided at the center of the fixing part 11. Bolts can be inserted into the through hole on the fixing part 11 to install the base 11 at a designated position.

[0037] To sum up, in actual use, the installer can connect the grounding device bolts to the inside of the grounding connection box or other locations through the fixing part 11 on the base 1, open the wire fixing slot cover 14 and the terminal block cover 13, use wire strippers to strip the PE line of the equipment, the grounding connection line, or the total equipotential connection line (hereinafter collectively referred to as wire 01) to be connected, bend the exposed metal wire head into a "J" shape, wrap it around the bolt column 42 of the fixing bolt 4, use a screwdriver to screw the fixing bolt 4 into the fixing screw hole 212 and the threaded hole 103, and tighten it with force. In this process, the tapered part of the bottom surface of the bolt head 41 presses down the exposed metal part of the wire 01, and the contact part 21 with the contact groove 211 is tightly fitted with the exposed metal part of the wire 01 through the fitting part 210, and the concave arc surface of the fitting part 210 is in contact with the arc surface of the wire 01, so that the contact area is increased. At the same time, during this process, the fixing bolt 4 abuts against the grounding connection line and is threadedly connected to the contact portion 21 through the fixing screw hole 212, which can also further increase the contact area and better achieve a good electrical connection between the conductor 01 and the grounding device.

[0038] Then, the lead wire 01 is placed inside the wire slot 101, and the fixed wire slot cover 14 is installed. During the installation process, the wire clamping column 141 at the bottom of the fixed wire slot cover 14 is inserted downward into the wire slot 101, and then the fixed wire slot cover 14 and the base 1 are fixed with bolts. During the process, the upper clamping wire slot 142 is pressed down to hold the wire 01 together with the lower clamping wire slot 102 to prevent the wire 01 from shaking and loosening. Finally, the installer covers the terminal block cover 13, and the first magnetic sheet 131 and the second magnetic sheet 31 attract each other to close the cover tightly, completing the installation of the grounding device.

[0039] Therefore, the device can ensure good grounding connection of the grounding connection line of the high-voltage equipment, prevent fire caused by poor conductivity of the terminals and connectors of the equipment PE line, and solve the reliability problem of the grounding connection of the electrical appliance.

[0040] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A high voltage grounding device, characterized in that: The invention comprises a base (1), on which a contact plate (2) is mounted; the contact plate (2) comprises a long connecting strip (22) and a plurality of contact portions (21) fixedly connected to one side or both sides of the connecting strip (22); The contact portion (21) is provided with a contact groove (211) at the top, a fixing screw hole (212) is provided at the center of the contact groove (211), a plurality of threaded holes (103) are provided on the base (1), the threaded holes (103) and the fixing screw holes (212) are arranged in a one-to-one correspondence, and fixing bolts (4) are connected to the threaded holes (103) and the fixing screw holes (212) through internal threads; a grid plate (3) is installed on the top of the contact plate (2).

2. The high voltage grounding device according to claim 1, characterized in that: A fitting portion (210) is provided between the top surface of the contact portion (21) and the bottom of the contact groove (211), and the fitting portion (210) is a curved surface.

3. The high voltage grounding device according to claim 2, characterized in that: The fixing bolt (4) comprises a bolt head (41) and a bolt column (42) fixedly connected to the bottom of the bolt head (41); the bottom surface of the bolt head (41) has a taper.

4. The high voltage grounding device according to claim 1, characterized in that: The base (1) is provided with a plurality of wire grooves (101), and the wire grooves (101) are arranged corresponding to the contact parts (21).

5. The high voltage grounding device according to claim 4, characterized in that: A wire fixing slot cover plate (14) is installed on the top of the base (1).

6. The high voltage grounding device according to claim 5, characterized in that: The bottom surface of the wire trough (101) is provided with a lower wire clamping trough (102); a plurality of wire clamping posts (141) are installed at the bottom of the wire fixing trough cover plate (14); the wire clamping posts (141) are arranged corresponding to the wire trough (101); and an upper wire clamping trough (142) is provided at the bottom of the wire clamping posts (141).

7. The high voltage grounding device according to claim 1, characterized in that: An openable and closable wiring row cover plate (13) is installed on the grid plate (3).

8. The high voltage grounding device according to claim 7, characterized in that: The wiring row cover plate (13) is hinged to one end of the grid plate (3) via a hinge point (12).

9. The high voltage grounding device according to claim 8, characterized in that: A first magnetic sheet (131) is installed at one end of the wiring row cover plate (13) away from the hinge point (12), and a second magnetic sheet (31) is installed at one end of the top of the grid plate (3) away from the hinge point (12), and the first magnetic sheet (131) and the second magnetic sheet (31) are arranged correspondingly.

10. The high voltage grounding device according to claim 1, characterized in that: Fixing parts (11) are installed on both sides of the bottom of the base (1).

Images