A new high-voltage bushing structure

Abstract

The utility model discloses a novel high -voltage bushing structure belongs to electrical equipment technical field, including bushing, the middle part of bushing outside is provided with the fixed block for connecting with the partition, the outer surface of bushing is provided with the umbrella skirt, bushing inside's front and back two ends are provided as the electricity -making cavity and static contact fixed cavity respectively, the static contact fixed cavity in the bushing axial place of placing has the static contact in the central position, the front end of static contact is limited in the electricity -making cavity through static contact limiting component, the rear end of static contact passes out static contact fixed cavity and is fixed through static contact fixed component, the electricity -making cavity is provided with the movable contact component that matches with static contact in. The utility model discloses a novel high -voltage bushing structure can effectively improve electrical insulation performance, reduce the volume of bushing, save the material required for preparation, and significantly reduce the production cost.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a novel high-voltage through-wall bushing structure. Background Technology

[0002] High-voltage wall bushings are core components in the field of electrical equipment used to connect high-voltage circuits on both sides of a wall. Their performance directly affects the safe and stable operation of the power system and they are widely used in power equipment such as substations, switchgear, and power transformers.

[0003] In existing technologies, high-voltage wall bushings typically require increased overall size, more skirts, or longer skirt spacing to ensure sufficient creepage distance in order to meet insulation requirements. This results in bulky products that occupy a lot of space, hindering the miniaturization and integration of power equipment. Furthermore, the contact surfaces of the moving and stationary contacts in traditional wall bushings are often exposed externally, or the insulation cavity design is flawed, making them susceptible to environmental factors such as humidity and dust. This limits their electrical insulation performance and poses a safety hazard of high-voltage discharge.

[0004] In addition, the existing structure has a low material utilization rate, and the excessive volume leads to the consumption of a large amount of insulating and conductive materials during the manufacturing process, resulting in high production costs. The static contact fixing structure of some products is complex and uses multiple parts to splice and fix it, which is not only cumbersome to assemble, but also has the problem of insufficient fixing stability. After long-term use, the contacts may loosen, affecting the reliability of conductivity.

[0005] To address the problems of large size, limited insulation performance, high production cost, and insufficient fixing stability in the existing technologies, it is urgent to design a new type of high-voltage through-wall bushing structure that can reduce size, save materials, and lower costs while ensuring insulation performance and reliability. Summary of the Invention

[0006] The purpose of this invention is to provide a novel high-voltage through-wall bushing structure that can effectively improve electrical insulation performance, reduce the volume of the through-wall bushing, save the materials required for preparation, and reduce production costs.

[0007] To achieve the above objectives, this utility model provides a novel high-voltage through-wall bushing structure, including a through-wall bushing. A fixing block for connection with a partition is provided in the middle of the outer side of the through-wall bushing, and an umbrella skirt is provided on the outer surface of the through-wall bushing. The front and rear ends of the inner side of the through-wall bushing are respectively configured as a receiving cavity and a stationary contact fixing cavity. A stationary contact located at the center position is placed in the stationary contact fixing cavity along the axial direction of the through-wall bushing. The front end of the stationary contact is restricted in the receiving cavity by a stationary contact limiting component, and the rear end of the stationary contact extends out of the stationary contact fixing cavity and is fixed by the stationary contact fixing component. A moving contact assembly matching the stationary contact is provided in the receiving cavity.

[0008] Preferably, the through-wall sleeve is integrally cast using a custom mold.

[0009] Preferably, the fixing block has a threaded hole.

[0010] Preferably, the umbrella skirt located at the rear end of the fixing block has a staggered height distribution.

[0011] Preferably, the contact cavity and the stationary contact fixing cavity are coaxially distributed, and the opening area of ​​the contact cavity is larger than the opening area of ​​the stationary contact fixing cavity; the stationary contact limiting assembly includes a positioning block whose sidewall is fitted with the sidewall of the contact cavity, the center of the positioning block is a through hole, and the stationary contact passes through the through hole, and the front end of the stationary contact is provided with a retaining ring located at the front end of the positioning block and having an area larger than the through hole.

[0012] Preferably, the outer surface of the rear end of the stationary contact is provided with threads, and the stationary contact fixing assembly includes a baffle located at the rear end of the through-wall sleeve, and a locking nut screwed onto the stationary contact is provided on the rear side of the baffle.

[0013] Preferably, the moving contact assembly includes a quincunx-shaped contact for engaging with the front end of the stationary contact, and the front end of the quincunx-shaped contact is connected to a moving contact link.

[0014] Therefore, the beneficial effects of this utility model using the above-mentioned novel high-pressure through-wall bushing structure are as follows: (1) The structural design of this utility model can effectively reduce the volume of the through-wall bushing under the same voltage level.

[0015] (2) The structural design of this utility model makes the meshing surface of the moving and stationary contacts located inside the cavity of the through-wall bushing, which can effectively improve the electrical insulation performance.

[0016] (3) The structure of this utility model can effectively save the materials required for preparation by optimizing the through-wall sleeve structure, and can significantly reduce the production cost.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of a novel high-pressure through-wall bushing structure of this utility model; Figure 2 This is a left-side view of an embodiment of a novel high-pressure through-wall bushing structure according to this utility model; Figure 3 This is a schematic diagram of the external structure of a wall bushing according to an embodiment of a novel high-pressure wall bushing structure of this utility model; Figure 4 This is a cross-sectional view of the internal structure of a wall bushing according to an embodiment of a novel high-pressure wall bushing structure of this utility model; Figure 5 This is a schematic diagram of the static contact of a novel high-pressure through-wall bushing structure according to this utility model.

[0019] Figure Labels 1. Through-wall sleeve; 2. Fixing block; 21. Threaded hole; 3. Umbrella skirt; 4. Electrical connection cavity; 5. Stationary contact fixing cavity; 6. Stationary contact; 61. Retaining ring; 7. Positioning block; 81. Plum blossom-shaped contact; 82. Moving contact connecting rod; 9. Baffle; 10. Locking nut. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Example 1: like Figure 1 As shown, this utility model provides a novel high-voltage through-wall bushing structure, including a through-wall bushing 1. The through-wall bushing 1 is made of a composite material mainly composed of epoxy resin components and is integrally cast using a custom mold, which can effectively insulate the internal electrical connection structure.

[0023] like Figure 2 As shown, a fixing block 2 for connecting with the partition is provided in the middle of the outer side of the wall bushing 1. The axial cross-sectional area of ​​the fixing block 2 is larger than the axial cross-sectional area of ​​the wall bushing 1, and a threaded hole 21 is provided on the fixing block 2, so that the entire high-pressure wall bushing structure can be fixed to the partition later by bolts that match the threaded hole 21.

[0024] like Figure 3As shown, the through-wall bushing 1 is divided into front and rear parts at the fixing block 2. The volume of the rear end of the through-wall bushing 1 is significantly smaller than that of the front end. While ensuring the insulation effect meets the standards, it can significantly reduce the materials required to produce the through-wall bushing 1, which is conducive to reducing production costs and also makes it easier to install the through-wall bushing 1 smoothly on the partition.

[0025] like Figure 3 As shown, to improve the insulation performance of the high-voltage through-wall bushing structure, a skirt 3 is provided on the outer surface of the through-wall bushing 1. This effectively increases the creepage distance of high-voltage electricity, thereby improving the insulation performance. In this embodiment, since the volume of the rear end of the through-wall bushing 1 is smaller than that of the front end, the skirt 3 located at the rear end of the fixing block 2 is designed with a staggered height distribution to extend the creepage distance at the rear end of the through-wall bushing 1. The advantage of this design is that it can minimize the material required to produce the through-wall bushing 1 while ensuring sufficient creepage distance, thus reducing production costs. In this embodiment, this structural design ensures that the creepage distance at both ends of the fixing block 2 is 530mm, effectively preventing the conduction of internal high-voltage electricity.

[0026] like Figure 4 As shown, the front and rear ends of the inner side of the through-wall sleeve 1 are respectively set as the electrical connection cavity 4 and the stationary contact fixing cavity 5. The stationary contact fixing cavity 5 is axially placed along the through-wall sleeve 1 and is located at the center position. In this embodiment, the stationary contact 6 is made of copper, and the front end of the stationary contact 6 is restricted in the electrical connection cavity 4 by the stationary contact limiting component.

[0027] The energizing cavity 4 and the stationary contact fixing cavity 5 are coaxially distributed, and the opening area of ​​the energizing cavity 4 is larger than the opening area of ​​the stationary contact fixing cavity 5. The stationary contact limiting assembly includes a positioning block 7 whose sidewall is attached to the sidewall of the energizing cavity 4. The center of the positioning block 7 is a through hole, and the stationary contact 6 passes through the through hole. A retaining ring 61 with an area larger than the through hole is provided at the front end of the stationary contact 6, located at the front end of the positioning block 7. Figure 5 As shown. Through the cooperation of the positioning block 7 and the retaining ring 61, the front end of the stationary contact 6 can be effectively limited to prevent the stationary contact 6 from detaching from the contact cavity 4.

[0028] The rear end of the stationary contact 6 extends out of the stationary contact fixing cavity 5 and is fixed by the stationary contact fixing assembly. In this embodiment, the outer surface of the rear end of the stationary contact 6 is provided with threads, and the threads are treated with a silver plating process to ensure the conductivity of the stationary contact 6. The stationary contact fixing assembly includes a baffle 9 located at the rear end of the through-wall sleeve 1. A locking nut 10 screwed onto the stationary contact 6 is provided on the rear side of the baffle 9. By tightening the locking nut 10 inward, the locking nut 10 can drive the baffle 9 to be firmly pressed onto the through-wall sleeve 1. Combined with the limiting effect of the stationary contact limiting assembly on the stationary contact 6, it can ensure that the stationary contact 6 is stably fixed inside the through-wall sleeve 1, thus ensuring the stability of the structure.

[0029] like Figure 1 As shown, a moving contact assembly matching the stationary contact 6 is provided within the electrical connection cavity 4. The moving contact assembly includes a quincunx-shaped contact 81 for engaging with the front end of the stationary contact 6. The quincunx-shaped contact 81 effectively improves the engagement capability with the stationary contact 6, ensuring the stability of the connection process. A moving contact connecting rod 82 is connected to the front end of the quincunx-shaped contact 81 for connecting with other devices. The connection parts between the quincunx-shaped contact 81 and the stationary contact 6 are all located within the electrical connection cavity 4, which effectively improves the insulation effect during the electrical connection process.

[0030] During use, simply fix the fixing block 2 to the corresponding partition with bolts. When it is necessary to connect the power through the wall, connect the rear end of the stationary contact 6 to the equipment to be connected on one side of the partition, connect the moving contact rod 82 to the equipment to be connected on the other side of the partition, and then snap the plum blossom-shaped contact 81 onto the front end of the stationary contact 6 to achieve the power connection through the wall.

[0031] Therefore, the present invention adopts the above-mentioned novel high-voltage through-wall bushing structure, which can effectively improve electrical insulation performance, reduce the volume of the through-wall bushing, save the materials required for preparation, and significantly reduce production costs.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A novel high-pressure through-wall bushing structure, characterized in that: The device includes a through-wall sleeve, with a fixing block for connecting to a partition at the middle of the outer side of the through-wall sleeve, and a skirt on the outer surface of the through-wall sleeve. The front and rear ends of the inner side of the through-wall sleeve are respectively configured as a receiving cavity and a stationary contact fixing cavity. A stationary contact located at the center position is placed in the stationary contact fixing cavity along the axial direction of the through-wall sleeve. The front end of the stationary contact is restricted in the receiving cavity by a stationary contact limiting component, and the rear end of the stationary contact extends out of the stationary contact fixing cavity and is fixed by the stationary contact fixing component. A moving contact assembly matching the stationary contact is provided in the receiving cavity.

2. The novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The through-wall sleeve is integrally cast using a custom mold.

3. The novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The fixing block has threaded holes.

4. The novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The umbrella skirt located at the rear end of the fixed block has a staggered height distribution.

5. A novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The energizing cavity and the stationary contact fixing cavity are coaxially distributed, and the opening area of ​​the energizing cavity is larger than the opening area of ​​the stationary contact fixing cavity; the stationary contact limiting assembly includes a positioning block whose sidewall is attached to the sidewall of the energizing cavity, the center of the positioning block is a through hole, and the stationary contact passes through the through hole, and the front end of the stationary contact is provided with a retaining ring located at the front end of the positioning block and whose area is larger than the through hole.

6. The novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The outer surface of the rear end of the stationary contact is provided with threads, and the stationary contact fixing assembly includes a baffle located at the rear end of the through-wall sleeve, and a locking nut screwed onto the stationary contact is provided on the rear side of the baffle.

7. A novel high-pressure through-wall bushing structure according to claim 1, characterized in that: The moving contact assembly includes a quincunx-shaped contact for engaging with the front end of the stationary contact, and the front end of the quincunx-shaped contact is connected to a moving contact link.

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