High-voltage bus shielding sleeve with capacitive voltage divider

Abstract

The utility model discloses a high-voltage bus shielding sleeve with a capacitive voltage divider, which comprises a sleeve body and a high-voltage conductive bus penetrating hole arranged in the sleeve body, and the capacitive voltage divider, a grounding shielding grading ring and a high-voltage shielding grading ring are respectively arranged in the sleeve body. The outer side of the bushing body is provided with a bushing installation and grounding insert, a signal output insert and a signal input insert, and the signal input insert is sequentially connected with a high-voltage shielding grading ring, a capacitive voltage divider and a grounding shielding grading ring through a signal input connecting line. And the grounding shielding grading ring is connected with a signal output insert through a signal output connecting wire. According to the utility model, the function of the capacitive voltage divider is combined with the function of the bus isolation sleeve, so that the cost of epoxy resin mixed glue is saved, chemical material resources are saved, and the problem that the electrified state of the high-voltage conductive bus cannot be monitored due to the limitation of the structure of the high-voltage distribution switch cabinet is solved.

Description

Technical Field

[0001] The utility model belongs to the field of electrical equipment cabinet shielding devices, and in particular relates to a high-voltage busbar shielding bushing with a capacitive voltage divider. Background Art

[0002] The existing high-voltage busbar shielding bushing formed by potting epoxy resin mixed adhesive insulating material does not have a capacitive voltage divider, and only serves to isolate the voltage between the high-voltage conductive busbar and the electrical equipment cabinet. The charged state of the high-voltage conductive busbar cannot be monitored. To achieve monitoring, it is necessary to additionally add an epoxy resin mixed adhesive insulating product containing a capacitive voltage divider connected to the high-voltage conductive busbar. However, due to the space limitation of the cabinet structure, the epoxy resin mixed adhesive insulating product containing a capacitive voltage divider connected to the high-voltage conductive busbar cannot be installed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to address the deficiencies of the above-mentioned prior art and to provide a high-voltage busbar shielding bushing with a capacitor voltage divider, which combines the function of the capacitor voltage divider with the function of the busbar isolation bushing, saves the cost of epoxy resin mixed glue, saves chemical material resources, and solves the problem that the high-voltage distribution switch cabinet cannot monitor the charged state of the high-voltage conductive bus due to structural limitations.

[0004] The technical solution adopted by the utility model is: a high-voltage busbar shielding bushing with a capacitor voltage divider, comprising a bushing body and a high-voltage conductive busbar hole arranged inside the bushing body, wherein the bushing body is respectively provided with a capacitor voltage divider, a grounding shielding grading ring and a high-voltage shielding grading ring, and the outside of the bushing body is respectively provided with a bushing installation and grounding insert, a signal output insert and a signal input insert, wherein the signal input insert is connected to the high-voltage shielding grading ring, the capacitor voltage divider and the grounding shielding grading ring in sequence through a signal input connecting line, and the grounding shielding grading ring is connected to the signal output insert through a signal output connecting line, and an equipotential connecting line is also provided on the signal input insert, and the equipotential connecting line extends to the inner side of the high-voltage conductive busbar hole, and the bushing installation and grounding insert are connected to the grounding shielding grading ring through the grounding connecting line.

[0005] In one embodiment, the sleeve body is potted and formed by epoxy resin mixed adhesive insulating material.

[0006] In one of the embodiments, a raised portion is provided in the middle of the sleeve body, and the sleeve mounting and grounding insert, the signal output insert and the signal input insert are all arranged on the raised portion.

[0007] In one of the embodiments, an umbrella skirt assembly is also provided on the sleeve body.

[0008] In one of the embodiments, the umbrella skirt assembly includes a first umbrella skirt and a second umbrella skirt, and the first umbrella skirt and the second umbrella skirt are both in arrays and are arranged at intervals.

[0009] In one embodiment, the outer diameter of the first shed is greater than the outer diameter of the second shed.

[0010] In one embodiment, each group of the first umbrella skirts has one, and each group of the second umbrella skirts has two.

[0011] The beneficial effects of the utility model are as follows: a capacitive voltage divider and components cooperating with the capacitive voltage divider are added on the basis of the bushing body, the function of the capacitive voltage divider is combined with the function of the busbar isolation bushing, the cost of epoxy resin mixed glue, the chemical material resources are saved, and the problem that the high-voltage distribution switch cabinet cannot monitor the charged state of the high-voltage conductive bus due to structural limitations is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] In the figure: 1. bushing body; 2. capacitor voltage divider; 3. grounding shielding grading ring; 4. high-voltage shielding grading ring; 5. bushing installation and grounding insert; 6. signal output insert; 7. signal input insert; 8. signal input connecting wire; 9. signal output connecting wire; 10. equipotential connecting wire; 11. grounding connecting wire; 101. hole for high-voltage conductive busbar; 102. raised part; 103. umbrella skirt assembly; 1031. first umbrella skirt; 1032. second umbrella skirt. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1 As shown, a high-voltage busbar shielding bushing with a capacitor voltage divider comprises a bushing body 1 and a high-voltage conductive busbar hole 101 arranged inside the bushing body 1, wherein the bushing body 1 is provided with a capacitor voltage divider 2, a grounding shielding grading ring 3 and a high-voltage shielding grading ring 4, respectively, and the bushing body 1 is provided with a bushing installation and grounding insert 5, a signal output insert 6 and a signal input insert 7 on the outside, respectively, the signal input insert 7 is connected to the high-voltage shielding grading ring 4, the capacitor voltage divider 2 and the grounding shielding grading ring 3 in sequence through a signal input connecting line 8, the grounding shielding grading ring 3 is connected to the signal output insert 6 through a signal output connecting line 9, and an equipotential connecting line 10 is also provided on the signal input insert 7, the equipotential connecting line 10 extends to the inside of the high-voltage conductive busbar hole 101, and the bushing installation and grounding insert 5 is connected to the grounding shielding grading ring 3 through a grounding connecting line 11.

[0016] In this embodiment, the bushing body 1 is potted and formed by epoxy resin mixed adhesive insulating material.

[0017] In this embodiment, a protrusion 102 is provided in the middle of the bushing body 1 , and the bushing mounting and grounding insert 5 , the signal output insert 6 and the signal input insert 7 are all arranged on the protrusion 102 .

[0018] In this embodiment, an umbrella skirt assembly 103 is further provided on the sleeve body 1 .

[0019] In this embodiment, the umbrella skirt assembly 103 includes a first umbrella skirt 1031 and a second umbrella skirt 1032. The first umbrella skirt 1031 and the second umbrella skirt 1032 are both arranged in an array and at intervals.

[0020] In this embodiment, the outer diameter of the first umbrella skirt 1031 is greater than the outer diameter of the second umbrella skirt 1032 .

[0021] In this embodiment, each group of the first umbrella skirts 1031 includes one, and each group of the second umbrella skirts 1032 includes two.

[0022] The equipotential connection line 10 is connected to the high-voltage conductive busbar during use, and introduces the high-voltage signal into the high-voltage shielding grading ring 4 and the high-voltage end of the capacitive voltage divider 2 .

[0023] In the present application, the grounding shielding grading ring 3 can form a zero potential for the induced voltage formed by the high-voltage shielding grading ring 4 through the grounding shielding grading ring 3 and the bushing installation and the grounding insert 5, thereby preventing corona discharge from occurring between the bushing body 1 and the mounting plate or bracket on which the bushing body 1 is installed, reducing the electrical aging of the bushing body 1, and increasing the service life of the product; at the same time, the electric field distribution of the induced voltage is improved.

[0024] In the present application, the high-voltage shielding grading ring 4 connects the high voltage on the high-voltage conductive bus that passes through the bushing body 1 through the equipotential connecting line 10 to connect the high voltage on the high-voltage conductive bus with the high-voltage shielding grading ring 4. An equipotential is formed between the high-voltage conductive bus and the high-voltage shielding grading ring 4. The air between the high-voltage conductive bus and the inner wall of the bushing body 1 is not broken down, and corona discharge will not be generated, thereby reducing the electrical aging of the bushing body 1, increasing the service life of the product, and improving the local discharge level of the bushing body 1.

[0025] In the present application, the bushing installation and grounding insert 5 facilitates fixing the bushing body 1 on the mounting plate or bracket, and transmits the induced voltage in the grounding shielding grading ring 3 to the mounting plate or bracket through the installation insert and then to the ground.

[0026] In the present application, the signal output insert 6 outputs the voltage signal in the capacitive voltage divider 2 to the conductor connected thereto, which can facilitate the fixation of the connection signal transmission line.

[0027] In the present application, the insert thread hole end of the signal input insert 7 is connected to the equipotential connecting line 10, and the other end is connected to the capacitive voltage divider 2 through the signal input connecting line 8. The high-voltage signal can be input into the capacitive voltage divider 2 through this insert; the setting of the signal input insert 7 can also facilitate the fixation of the equipotential connecting line 10 and the signal input connecting line 8.

[0028] In the present application, the shed assembly 103 is provided to increase the surface creepage distance of the product and improve the insulation performance of the product in dirty and high-altitude areas. The shed assembly 103 includes a first shed 1031 and a second shed 1032 with different outer diameters, which can increase the arc flash distance of the shed on the surface of the bushing body 1, enhance and improve the insulation performance of the bushing body 1, and expand the application environment of the bushing body 1.

[0029] The present application has a simple overall structure and is easy to process; the epoxy resin molding mold used for molding the same has a simple structure, and the overall epoxy resin molding and canning of the sleeve are convenient, which can effectively improve production efficiency.

[0030] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A high-voltage busbar shielding bushing with a capacitive voltage divider, characterized in that: The invention comprises a bushing body (1) and a high-voltage conductive busbar hole (101) arranged inside the bushing body (1), wherein a capacitor voltage divider (2), a grounding shielding grading ring (3) and a high-voltage shielding grading ring (4) are respectively arranged inside the bushing body (1), and a bushing installation and grounding insert (5), a signal output insert (6) and a signal input insert (7) are respectively arranged outside the bushing body (1), wherein the signal input insert (7) is connected to the high-voltage shielding grading ring (4), the capacitor voltage divider (2) and the grounding shielding grading ring (3) in sequence through a signal input connecting line (8), and the grounding shielding grading ring (3) is connected to the signal output insert (6) through a signal output connecting line (9), and an equipotential connecting line (10) is also arranged on the signal input insert (7), wherein the equipotential connecting line (10) extends to the inside of the high-voltage conductive busbar hole (101), and the bushing installation and grounding insert (5) is connected to the grounding shielding grading ring (3) through a grounding connecting line (11).

2. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 1, characterized in that: The bushing body (1) is potted and formed by epoxy resin mixed adhesive insulating material.

3. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 1 or 2, characterized in that: A raised portion (102) is provided in the middle of the sleeve body (1), and the sleeve mounting and grounding insert (5), the signal output insert (6) and the signal input insert (7) are all arranged on the raised portion (102).

4. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 3, characterized in that: The sleeve body (1) is also provided with an umbrella skirt assembly (103).

5. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 4, characterized in that: The umbrella skirt assembly (103) comprises a first umbrella skirt (1031) and a second umbrella skirt (1032), wherein the first umbrella skirt (1031) and the second umbrella skirt (1032) are both arranged in arrays and at intervals.

6. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 5, characterized in that: The outer diameter of the first umbrella skirt (1031) is greater than the outer diameter of the second umbrella skirt (1032).

7. A high-voltage busbar shielding bushing with a capacitive voltage divider according to claim 6, characterized in that: Each group of the first umbrella skirts (1031) comprises one, and each group of the second umbrella skirts (1032) comprises two.

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