Insulation shielding cylinder sealing structure

Abstract

The utility model relates to the technical field of tubular buses, in particular to an insulating shielding cylinder sealing structure, which comprises a shielding cylinder, a bus intermediate joint in the shielding cylinder, insulating buses connected with two ends of the bus intermediate joint, and connecting fixing pieces positioned at two ends of the shielding cylinder, the shielding cylinder comprises a cylinder body and a transition joint, one end of the transition joint is connected to the cylinder body, and the other end of the transition joint is connected with the connecting fixing piece through a bolt; the connecting and fixing piece is coaxial with the bus and sleeves the outer diameter of the bus; a radial sealing mechanism is arranged on the connecting and fixing piece, and an axial sealing mechanism is arranged at the matching part of the connecting and fixing piece and the insulated bus; the sealing structure is a sealing structure in the axial direction and the radial direction of the lap joint position of the bus incoming line shielding cylinder, namely, sealing is considered by extruding the elastic O-shaped ring from the axial direction and the radial direction of the all-insulation copper pipe bus, multiple protection is carried out on permeation blind spots which can exist at each position, and impurity permeation is prevented.

Description

Technical Field

[0001] This utility model relates to the field of busbar technology, specifically to an insulating shielding cylinder sealing structure, suitable for sealing both sides of the shielding cylinder at the joint connection in a segmented fully insulated busbar. Background Technology

[0002] Due to its inherent structural limitations, fully insulated copper busbars cannot be connected as a single, continuous section like bare copper busbars. Between two sections of fully insulated copper busbars of theoretically maximum single-phase length, an insulating busbar shield is required to connect the two disconnected sections and ensure that the entire operating fully insulated copper busbar is at the same potential. This raises the issue of sealing the shield. If the seal is inadequate, impurities or moisture may enter, generating a high-potential discharge that affects the performance of the fully insulated copper busbar and consequently impacts the safe operation of the entire power grid.

[0003] Existing solutions involve axial sealing on both sides of the insulating cylinder, but no radial sealing. The only radial sealing is the rigid contact seal of the flange structure. Alternatively, a sealant application method can be used, but this method suffers from slow curing and aging and peeling over time. Utility Model Content

[0004] In view of the above-mentioned technical defects, this utility model provides an insulating shield cylinder sealing structure that can achieve multiple protections by considering the possible penetration blind spots in the axial and radial directions of the busbar inlet shield cylinder overlap. This sealing structure considers sealing from the axial and radial directions of the fully insulated copper tube busbar by setting up their respective sealing mechanisms, thereby ensuring that any place where impurities can penetrate is protected.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an insulating shielding cylinder sealing structure, comprising: a shielding cylinder, a busbar intermediate joint inside the shielding cylinder, an insulating busbar connecting both ends of the busbar intermediate joint, and connecting fasteners located at both ends of the shielding cylinder; the shielding cylinder includes a cylinder body and a transition joint, one end of the transition joint being connected to the cylinder body, and the other end of the transition joint being connected to the connecting fasteners by bolts; the connecting fasteners are coaxial with the busbars and sleeved on the outer diameter of the busbars; a radial sealing mechanism is provided on the connecting fasteners, and an axial sealing mechanism is provided at the mating point between the connecting fasteners and the insulating busbars;

[0006] Furthermore, the fixed connection includes: a first flange, a second flange, and a third flange arranged sequentially from the direction closer to the shielding cylinder to the direction farther away from the shielding cylinder, the three flanges being concentric and having through holes for the insulated busbar to pass through; the three flanges are connected to the transition joint of the shielding cylinder by bolts in the direction close to the outer diameter of the three flanges.

[0007] Furthermore, the transition joint between the first flange and the shielding cylinder is close together, the second flange is close to the outside of the first flange, and the third flange is close to the outside of the second flange;

[0008] Furthermore, the radial sealing mechanism includes three elastic O-rings. The first elastic O-ring is disposed between the transition joint of the first flange and the shielding cylinder. A first groove is provided on the first flange, and the first elastic O-ring is embedded in the first groove. Thus, the radial seal between the first flange and the shielding cylinder is achieved by the compression of the first elastic O-ring.

[0009] The second elastic O-ring is disposed between the first flange and the second flange. A second groove is provided on the end face of the second flange near the first flange. The second elastic O-ring is embedded in the second groove, so that the radial seal between the second flange and the first flange is achieved by the compression of the second elastic O-ring.

[0010] The third elastic O-ring is disposed between the second flange and the third flange. A third groove is provided on the end face of the second flange near the third flange. The third elastic O-ring is embedded in the third groove, so that the radial seal between the third flange and the second flange is achieved by the compression of the third elastic O-ring.

[0011] Furthermore, the axial sealing mechanism includes two annular elastic O-rings; the inner sides of the contact points between the first flange and the second flange, and between the second flange and the third flange, are provided with inclined straight surfaces that mate with the outer surface of the annular elastic O-rings, and the two inclined straight surfaces mate to form a V-groove for accommodating the annular elastic O-rings; the two annular elastic O-rings are respectively embedded in the two V-grooves.

[0012] Furthermore, each V-groove is formed by the oblique straight face of two adjacent flanges, and the mating angle between the two flanges constituting the V-groove is 90°.

[0013] Furthermore, a vertical stop edge perpendicular to the insulating busbar extends from the transition position between the two inclined straight surfaces. The vertical stop edge, the V-groove, and the outer diameter of the insulating busbar together form a space to accommodate the annular elastic O-ring.

[0014] The beneficial effects of adopting this technical solution are:

[0015] The sealing structure is achieved by sealing the axial and radial directions at the overlap of the busbar inlet shielding tube. That is, the sealing is achieved by squeezing the elastic O-ring from the axial and radial directions of the fully insulated copper tube busbar. Multiple protections are provided for every possible blind spot to prevent impurities from seeping in.

[0016] In a radial sealing mechanism, radial sealing between flanges is achieved through O-rings, as well as radial sealing between the flange and the sealing sleeve.

[0017] In the axial sealing mechanism, O-rings are used to seal the fully insulated copper tube busbar in the axial direction. This sealing structure is simple in structure and easy to install. It can protect the cleanliness of the inside of the shielding cylinder in all directions, thereby ensuring the quality of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0020] In the diagram, 1. Shielding cylinder, 2. Busbar intermediate joint, 3. Insulated busbar, 1.1. Cylinder body, 1.2. Transition joint, 4. Bolt, 5. First flange, 6. Second flange, 7. Third flange, 8. First elastic O-ring, 5.1. First groove, 9. Second elastic O-ring, 6.1. Second groove, 10. Third elastic O-ring, 6.2. Third groove, 11. Annular elastic O-ring, 12. Sloping straight surface, 13. Vertical flange. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] like Figure 1-2 An insulating shielding cylinder sealing structure is shown, comprising: a shielding cylinder 1, a busbar intermediate joint 2 inside the shielding cylinder 1, segmented insulating busbars 3 connecting the two ends of the busbar intermediate joint 2, and connecting fasteners located at both ends of the shielding cylinder 1; the shielding cylinder 1 includes a cylinder body 1.2 and a transition joint 1.2, one end of the transition joint 1.2 is connected to the cylinder body 1, and the other end of the transition joint 1.2 is connected to the connecting fasteners by bolts 4; the connecting fasteners are coaxial with the busbars 3 and sleeved on the outer diameter of the busbars 3; a radial sealing mechanism is provided on the connecting fasteners, and an axial sealing mechanism is provided at the mating point between the connecting fasteners and the insulating busbars 3;

[0023] Furthermore, the fixed connection includes: a first flange 5, a second flange 6, and a third flange 7 arranged sequentially from the direction close to the shielding cylinder 1 to the direction away from the shielding cylinder 1, the three flanges being concentric and having through holes for the insulated busbar 3 to pass through; the three flanges are connected to the transition joint 1.2 of the shielding cylinder 1 by bolts 4 in the direction close to the outer diameter of the three flanges.

[0024] Furthermore, the first flange 5 is close to the transition joint 1.2 of the shielding cylinder 1, the second flange 6 is close to the outside of the first flange 5, and the third flange 7 is close to the outside of the second flange 6.

[0025] Furthermore, the radial sealing mechanism includes three elastic O-rings. The first elastic O-ring 8 is disposed between the transition joint 1.2 of the first flange 5 and the shielding cylinder 1. The first flange 5 has a first groove 5.1, and the first elastic O-ring 8 is embedded in the first groove 5.1. Thus, the radial seal between the first flange 5 and the shielding cylinder 1 is achieved by the compression of the first elastic O-ring 8. The arrangement of the first elastic O-ring 8 achieves the radial seal between the flange and the shielding cylinder 1.

[0026] The second elastic O-ring 9 is disposed between the first flange 5 and the second flange 6. A second groove 6.1 is provided on the end face of the second flange 6 near the first flange 5. The second elastic O-ring 9 is embedded in the second groove 6.1, so that the radial seal between the second flange 6 and the first flange 5 is achieved by the compression of the second elastic O-ring 9.

[0027] The third elastic O-ring 10 is disposed between the second flange 6 and the third flange 7. A third groove 6.2 is provided on the end face of the second flange 6 near the direction of the third flange 7. The third elastic O-ring 10 is embedded in the third groove 6.2, so that the radial seal between the third flange 7 and the second flange 6 is achieved by the compression of the third elastic O-ring 10.

[0028] Furthermore, the axial sealing mechanism includes two annular elastic O-rings 11; the inner sides of the contact points between the first flange 5 and the second flange 6, and between the second flange 6 and the third flange 7, are provided with inclined straight surfaces 12 that mate with the outside of the annular elastic O-rings 11, and the two inclined straight surfaces 12 mate to form a V-groove for accommodating the annular elastic O-rings 11; the two annular elastic O-rings 11 are respectively embedded in the two V-grooves;

[0029] Furthermore, each V-groove is formed by mating the inclined straight surfaces 12 of two adjacent flanges, with the mating angle between the two flanges constituting the V-groove being 90°; based on the aforementioned setting of the inclined straight surfaces 12, it is more beneficial to compress the annular elastic O-ring 11.

[0030] Furthermore, a vertical retaining edge 13, perpendicular to the insulating busbar 3, extends from the transition position between the two inclined straight surfaces 12. The vertical retaining edge 13, the V-groove, and the outer diameter of the insulating busbar 3 together form a space to accommodate the annular elastic O-ring 11. Based on the above scheme, the annular elastic O-ring 11 is sealed by flange compression. After compression, the annular elastic O-ring 22 deforms. The purpose of setting the vertical retaining edge 13 perpendicular to the insulating busbar 3 is to prevent the annular elastic O-ring 11 from leaking out due to compression.

[0031] The above-mentioned solution uses two annular elastic O-rings 11 between three flanges to provide double protection and sealing to the fully insulated copper tube busbar in the axial direction.

[0032] This solution is a simple, multi-directional sealing structure. It considers the axial and radial sealing at the overlap of the busbar inlet shielding cylinder, and provides multiple layers of protection for every possible penetration blind spot, ensuring a complete seal inside the insulation cylinder.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. An insulated shielded barrel seal structure, characterized by, The utility model relates to a shielding cylinder, busbar middle joint in shielding cylinder, insulating busbar connected with busbar middle joint two ends and connecting fixing piece located shielding cylinder both ends, shielding cylinder includes cylinder body and transition joint, one end of transition joint is connected on cylinder body, the other end of transition joint is connected with connecting fixing piece through bolt, connecting fixing piece is coaxial with busbar and is sleeved in busbar outer diameter, radial sealing mechanism is provided on connecting fixing piece, and axial sealing mechanism is provided at the cooperation of connecting fixing piece and insulating busbar. The connecting fixing piece comprises: a first flange, a second flange, and a third flange arranged in order from a direction close to the shielding cylinder to a direction away from the shielding cylinder, the three flanges are concentric and provided with through holes for the insulating busbar to pass through; the three flanges are connected to the transition joint of the shielding cylinder by bolts from the direction close to the outer diameter of the three flanges.

2. An insulating shield barrel seal structure according to claim 1, characterized by: The first flange is in close contact with the transition joint of the shielding cylinder, the second flange is in close contact with the outside of the first flange, and the third flange is in close contact with the outside of the second flange.

3. An insulating barrier can end structure as defined in claim 2, wherein: The radial sealing mechanism comprises three elastic O-rings, a first elastic O-ring is arranged between the first flange and the transition joint of the shielding cylinder; a first groove is formed in the first flange, and the first elastic O-ring is embedded in the first groove; 4. An insulating barrier can end structure as defined in claim 2, wherein: A second elastic O-ring is arranged between the first flange and the second flange, a second groove is formed in the end surface of the second flange close to the first flange, and the second elastic O-ring is embedded in the second groove; A third elastic O-ring is arranged between the second flange and the third flange, a third groove is formed in the end surface of the second flange close to the third flange, and the third elastic O-ring is embedded in the third groove. The axial sealing mechanism comprises two annular elastic O-rings; the inner sides of the contact positions between the first flange and the second flange and between the second flange and the third flange are provided with inclined straight surfaces that cooperate with the outer parts of the annular elastic O-rings, the two inclined straight surfaces cooperate to form a V-shaped groove that accommodates the annular elastic O-rings; the two annular elastic O-rings are respectively embedded in the two V-shaped grooves.

5. An insulating barrier can end structure as defined in claim 2, wherein: Each V-shaped groove is formed by the butt joint of the inclined straight surfaces of two flanges adjacent to each other, and the butt joint angle between the two flanges constituting the V-shaped groove is 90°.

6. An insulating barrier can end structure as defined in claim 5, wherein: A vertical stop edge perpendicular to the insulating busbar extends from the transition positions of the two inclined straight surfaces, and the vertical stop edge, the V-shaped groove, and the outer diameter of the insulating busbar together form a space that accommodates the annular elastic O-ring.

7. An insulating barrier can end structure as defined in claim 5, wherein: ​

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