Capacitor installation structure for automatic switching reactive power compensation device

Abstract

A capacitor mounting structure for an automatic switching reactive power compensation device is characterized in that the automatic switching reactive power compensation device is provided with a cabinet body, a capacitor is provided with two or three wiring studs, conical-head-shaped contacts are screwed on the wiring studs, and an insulating plate is horizontally mounted in the cabinet body; through holes are formed in the insulating plate in an array manner, and floating binding posts are vertically mounted in the through holes; the upper part of the floating binding post is provided with a conical-nest-shaped contact matched with the conical-head-shaped contact, the middle part of the floating binding post is in sliding fit with the through hole, the lower part of the floating binding post is in threaded connection with a nut for connecting an electric wire, and a pressure spring is arranged between the conical-nest-shaped contact and the insulating plate; clamping plates used for clamping the two sides of the capacitor are further installed on the insulating plate in pairs, and a rotary pressing mechanism is arranged at the upper ends of the clamping plates and used for pressing the capacitor downwards. According to the utility model, the capacitor can be directly taken down to detect the capacitance value of the capacitor without dismounting the nut, time and labor are saved, and the maintenance efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of mine power distribution technology, and in particular to a capacitor mounting structure for an automatic switching reactive power compensation device. Background Technology

[0002] In mining equipment, devices such as variable frequency drives, soft starters, and medium-frequency heaters can cause waveform distortion and high-order harmonics in the power grid, polluting the grid and reducing its power factor. Automatic switching reactive power compensation devices can filter out waveform distortion and high-order harmonics, improving the power factor of the power grid.

[0003] Existing automatic switching reactive power compensation devices include capacitor banks, which house multiple capacitors. (See attached...) Figure 1 As shown, the power filter capacitor 1 is a rectangular prism with two or three terminal studs 11 on its top. During installation, nuts 8 and washers 9 are used to secure the wires to the terminal studs 11. The current problem is that troubleshooting or repair requires disconnecting the terminal studs from the wires to check the capacitor's capacitance and determine if a problem has occurred. Removing the nuts and disconnecting the terminal studs is time-consuming and labor-intensive, resulting in low repair efficiency. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a capacitor installation structure for an automatic switching reactive power compensation device, the purpose of which is to facilitate disconnection of the capacitor from the wire and improve maintenance efficiency.

[0005] Specifically, the present invention adopts the following technical solution:

[0006] A capacitor mounting structure for an automatic switching reactive power compensation device is disclosed. The automatic switching reactive power compensation device has a cabinet, and the capacitor has two or three terminal studs. Conical contacts are screwed onto the terminal studs. An insulating plate is horizontally mounted inside the cabinet. Through holes are arranged in an array on the insulating plate, and floating terminals are vertically mounted in the through holes. The upper part of the floating terminal has a conical socket-shaped contact that mates with the conical contacts, the middle part slides with the through holes, and the lower part is screwed with a nut for connecting wires. A compression spring is provided between the conical socket-shaped contact and the insulating plate. Clamping plates for clamping both sides of the capacitor are also installed in pairs on the insulating plate. A rotary clamping mechanism is provided at the upper end of the clamping plates for pressing the capacitor downward.

[0007] To further improve the technical solution, the clamping plate has an upper flange and a lower flange, the flanges of which are in the same direction, and the rotating pressing mechanism is disposed on the upper flange.

[0008] A further improved technical solution is provided, with a pair of elongated holes on the lower flange, and the clamping plate is mounted on the insulating plate in an adjustable manner using screws and the elongated holes.

[0009] To further improve the technical solution, the rotary clamping mechanism includes a pressure plate and a bolt fixed on the upper flange, with the threaded portion of the bolt facing upwards; the pressure plate has a connecting hole, and the pressure plate is rotatably mounted on the bolt, with a nut screwed into the threaded portion of the bolt, and a compression spring is provided between the nut and the pressure plate.

[0010] In a further improved technical solution, the capacitor is a rectangular prism, and the clamping plates hold the capacitor on both sides with a larger side area.

[0011] To further improve the technical solution, the taper of the cone-shaped contact is 40-60°.

[0012] The beneficial effects of implementing the above technical solution are as follows:

[0013] This invention involves screwing a cone-shaped contact onto the terminal stud of a capacitor, and then inverting the capacitor onto a floating terminal so that the cone-shaped contact makes contact with a conical-socket-shaped contact on the floating terminal, thereby achieving an electrical connection between the capacitor and the wire. Because the floating terminal is buoyant and the capacitor has a significant weight, the reliability of the contact between the cone-shaped and conical-socket-shaped contacts is ensured.

[0014] Compared to the prior art, this invention allows the capacitor to be removed without removing the nut, enabling direct testing of the capacitor's capacitance value, saving time and effort, and significantly improving maintenance efficiency. Attached Figure Description

[0015] Appendix Figure 1 The diagram shown is a schematic of the structure of an existing capacitor.

[0016] Appendix Figure 2 The diagram shown is a partial structural schematic of an automatic switching reactive power compensation device.

[0017] Appendix Figure 3 The diagram shown is a schematic of the structure of this capacitor.

[0018] Appendix Figure 4 The diagram shown is a schematic of the structure of the floating terminal block.

[0019] Appendix Figure 5 The diagram shows the installation structure of the floating terminal block.

[0020] Appendix Figure 6 The diagram shown is a structural schematic of the clamping plate.

[0021] Appendix Figure 7 The diagram shown is a schematic of the rotary clamping mechanism.

[0022] Appendix Figure 8 The diagram shows a schematic of the capacitor mounting structure.

[0023] In the attached diagram: 1. Capacitor; 11. Terminal stud; 12. Conical contact; 2. Cabinet; 3. Insulating plate; 4. Floating terminal; 41. Conical contact; 42. Sliding stud; 43. Connecting stud; 5. Clamping plate; 51. Upper flange; 52. Lower flange; 53. Elongated hole; 6. Rotary clamping mechanism; 61. Pressure plate; 62. Bolt; 7. Compression spring; 8. Nut; 9. Washer. Detailed Implementation

[0024] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] See attached document Figure 2 An automatic switching reactive power compensation device includes a cabinet 2, within which multiple capacitors 1 are installed for filtering waveform distortion and high-order harmonics, and improving the power factor of the power grid. The power filtering capacitors 1 are typically rectangular prisms; depending on the application requirements, some capacitors 1 have two terminal studs 11, while others have three terminal studs 11.

[0026] See attached document Figure 3 To address the problems described in the background section, the nut 8 and washer 9 originally connected to the terminal stud 11 of capacitor 1 are removed, and a conical contact 12 is screwed onto the terminal stud 11. The conical contact 12 is made of copper, and its exterior is machined with a conical surface with a taper of 40-60°. The interior of the conical contact 12 is machined with internal threads, and the conical contact 12 is connected to the terminal stud 11 via these threads.

[0027] Please refer to the appendix again. Figure 2 An insulating board 3 is installed inside the cabinet 2, and the insulating board 3 is arranged horizontally. Multiple through holes are arranged in an array on the insulating board 3, and floating terminals 4 are vertically installed in the through holes.

[0028] See attached document Figure 4 and attached Figure 5 The floating terminal 4 is also made of copper. The upper part of the floating terminal 4 has a conical contact 41 that mates with the conical contact 12; the middle part has a sliding post 42 that slides with the through hole; and the lower part is the connecting end, which has a connecting stud 43. A nut 8 and a washer 9 for connecting wires are screwed onto the connecting stud 43. To enable the floating terminal 4 to float, a compression spring 7 is provided between the conical contact 41 and the insulating plate 3.

[0029] See attached document Figure 6 The capacitor 1 is mounted on the cone-shaped contact 41 with the cone-shaped contact 12 facing downwards. To prevent the capacitor 1 from tilting to the side, a pair of clamping plates 5 are also installed on the insulating plate 3 to hold the two sides of the capacitor 1. A rotating clamping mechanism 6 is provided at the upper end of the clamping plate 5. The rotating clamping mechanism 6 is used to press the capacitor 1 downwards.

[0030] See attached document Figure 7 Specifically, the clamping plate 5 has an upper flange 51 and a lower flange 52, with the upper flange 51 and the lower flange 52 having the same flange direction. In order to adjust the installation position of the clamping plate 5 on the insulating plate 3 and to ensure good contact between the cone-shaped contact 12 and the cone-shaped contact 41, a pair of elongated holes 53 are provided on the lower flange 52. The installation position of the clamping plate 5 on the insulating plate 3 can be adjusted by screws and the elongated holes 53.

[0031] For secure clamping, a pair of clamping plates 5 are clamped on the two sides of the capacitor 1 with the larger side area.

[0032] In this embodiment, the rotary clamping mechanism 6 is disposed on the upper flange 51. The rotary clamping mechanism 6 includes a pressure plate 61 and a bolt 62 fixed on the upper flange 51, with the threaded portion of the bolt 62 facing upward. The pressure plate 61 has a connecting hole and is rotatably mounted on the bolt 62. A nut 8 is screwed onto the threaded portion of the bolt 62, and a compression spring 7 is disposed between the nut 8 and the pressure plate 61.

[0033] See attached document Figure 8During installation, capacitor 1 is inserted between a pair of clamps 5, so that the three conical contacts 12 correspond to the conical contacts 41 on the three floating terminals 4. Because the floating terminals 4 are buoyant, various dimensional errors can be overcome, ensuring good contact between the three conical contacts 12 and their corresponding conical contacts 41. Furthermore, due to the significant weight of capacitor 1, the reliability of the contact between the conical contacts 12 and the conical contacts 41 is guaranteed solely by the weight of capacitor 1. Then, the pressure plate 61 is rotated forward, pressing it downwards to tighten capacitor 1 and prevent the conical contacts 12 from disengaging from the conical contacts 41 due to vibration or other reasons. Additionally, the pressure applied to capacitor 1 by the pressure plate 61 can be adjusted by rotating the nut 8. Since the lower end of the floating terminal 4 is connected to the wire, capacitor 1 is connected to the wire through the floating terminal 4.

[0034] During maintenance, reverse pressure plate 61 and then directly remove capacitor 1 upwards. Since there is no need to remove nut 8, capacitor 1 can be directly removed to test its capacitance value, saving time and effort and greatly improving maintenance efficiency.

[0035] The parts not detailed herein are prior art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of protection of which is defined by the appended claims and their equivalents.

Claims

1. A capacitor mounting structure for an automatic switching reactive power compensation device, the automatic switching reactive power compensation device having a cabinet, the capacitor having two or three terminal studs, characterized in that: in A conical contact is screwed onto the terminal stud, and an insulating plate is horizontally installed inside the cabinet. Through holes are arranged in an array on the insulating plate, and floating terminals are vertically installed in the through holes. The upper part of the floating terminal has a conical socket-shaped contact that mates with the conical contact, the middle part slides with the through hole, and the lower part is screwed with a nut for connecting wires. A compression spring is provided between the conical socket-shaped contact and the insulating plate. Clamping plates for clamping both sides of the capacitor are also installed in pairs on the insulating plate. A rotary clamping mechanism is provided at the upper end of the clamping plate to press the capacitor downward.

2. The capacitor mounting structure for an automatic switching reactive power compensation device as described in claim 1, characterized in that: The clamping plate has an upper flange and a lower flange, and the flanges of the upper flange and the lower flange are in the same direction. The rotating clamping mechanism is disposed on the upper flange.

3. The capacitor mounting structure for an automatic switching reactive power compensation device as described in claim 2, characterized in that: A pair of elongated holes are provided on the lower flange, and the clamp is mounted on the insulation plate in an adjustable manner by screws and the position of the elongated holes.

4. The capacitor mounting structure for an automatic switching reactive power compensation device as described in claim 2, characterized in that: The rotary clamping mechanism includes a pressure plate and a bolt fixed on the upper flange, with the threaded portion of the bolt facing upwards; the pressure plate has a connecting hole, and the pressure plate is rotatably mounted on the bolt, with a nut screwed into the threaded portion of the bolt, and a compression spring is provided between the nut and the pressure plate.

5. The capacitor mounting structure for an automatic switching reactive power compensation device as described in claim 1, characterized in that: The capacitor is a rectangular prism, and the clamping plates hold the capacitor on both sides with a larger side area.

6. The capacitor mounting structure for an automatic switching reactive power compensation device as described in claim 1, characterized in that: The taper of the cone-shaped contact is 40-60°.

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