Mounting structure for high-voltage bushing and high-voltage bushing assembly

Abstract

The utility model provides an installation structure for a high-voltage sleeve and a high-voltage sleeve assembly. The high-voltage bushing comprises a bushing body and a mounting flange connected to the periphery of the bushing body, the mounting structure for the high-voltage bushing comprises a mounting component, the mounting component is provided with a mounting channel, a connecting side and a mounting side, the connecting side and the mounting side are oppositely arranged in the axis direction of the mounting channel, the connecting side is connected with the outer wall of a transformer box, and the mounting channel is used for mounting the bushing body; a connecting member; and the pressing component is located on the mounting side of the mounting component, one end of the connecting component is mechanically connected with the mounting component, the other end of the connecting component is connected with the pressing component, and the pressing component is used for pressing the mounting flange on the mounting side of the mounting component. According to the technical scheme, the problem that in the prior art, a high-voltage bushing installed on a transformer box body is prone to oil leakage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a high-voltage bushing installation structure and a high-voltage bushing assembly. Background Art

[0002] In the prior art, the studs are generally welded directly to the transformer box first, and then the mounting flange of the high-voltage bushing is fitted to the outer wall of the transformer box, and the tube body of the high-voltage bushing is passed through the transformer box, and finally the clamping plate is threadedly connected to the studs, so that the mounting flange is pressed against the outer wall of the transformer box by the clamping plate, thereby installing the high-voltage bushing on the transformer box; however, when the studs are welded to the transformer box, a weld nodule will appear. If the weld nodule is too large, and when the clamping plate presses the mounting flange against the outer wall of the transformer box, the weld nodule will collide with the high-voltage bushing. In this way, not only will there be a problem that the mounting flange is not tightly fitted to the outer wall of the transformer box, thereby affecting the sealing cooperation between the mounting flange and the outer wall of the transformer box, resulting in the problem of easy oil leakage of the high-voltage bushing; there will also be a problem that the high-voltage bushing material is damaged by the weld nodule, resulting in cracking and oil leakage. Utility Model Content

[0003] The main purpose of the utility model is to provide a high-voltage bushing installation structure and a high-voltage bushing assembly to solve the problem of oil leakage in the prior art of high-voltage bushings installed in a transformer box.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a mounting structure for a high-voltage bushing, the high-voltage bushing comprising a tube body and a mounting flange connected to the outer periphery of the tube body, the mounting structure for the high-voltage bushing comprising: a mounting member, having a mounting channel and a connecting side and a mounting side relatively arranged along the axial direction of the mounting channel, the connecting side being connected to the outer wall of the transformer box, the mounting channel being used to mount the tube body; a connecting member; a clamping member, located on the mounting side of the mounting member, one end of the connecting member being mechanically connected to the mounting member, the other end of the connecting member being connected to the clamping member, the clamping member being used to clamp the mounting flange to the mounting side of the mounting member.

[0005] Furthermore, a mounting hole is provided on the mounting side of the mounting component, and the connecting component is threadedly connected to the mounting hole.

[0006] Furthermore, an assembly through hole is provided on the clamping member, and the high-voltage bushing installation structure further comprises an anti-slip component located on a side of the clamping member away from the installation member, and the connecting member passes through the assembly through hole and is connected to the anti-slip component.

[0007] Further, the installation structure for the high-voltage bushing further includes: a limiting member installed between the installation member and the pressing member, with one end of the limiting member in contact with the installation member and the other end in contact with the pressing member to limit the distance between the pressing member and the installation member.

[0008] Further, the limiting member is a limiting sleeve located on the outer periphery of the connecting member.

[0009] Further, the connecting side of the installation member is welded to the transformer tank.

[0010] Further, from the connecting side to the installation side, the installation channel includes a first hole section and a second hole section connected in sequence, and the inner diameter of the first hole section is larger than that of the second hole section.

[0011] According to another aspect of the present invention, the present invention provides a high-voltage bushing assembly, including a high-voltage bushing and the above-mentioned installation structure for the high-voltage bushing used to install the high-voltage bushing on the transformer tank.

[0012] Further, an installation groove is provided on the side of the installation flange facing the installation member, and the high-voltage bushing further includes a sealing member located on the outer periphery of the tube body, and the sealing member is located in the installation groove.

[0013] Further, when the installation structure for the high-voltage bushing further includes a limiting member, the length of the limiting member in the axial direction of the installation channel is L, and L satisfies the formula: H + (1 - 35%)D - B ≤ L ≤ H + (1 - 25%)D - B; where H is the thickness of the installation flange in the axial direction of the installation channel, D is the thickness of the sealing member in the axial direction of the installation channel, and B is the depth of the installation groove in the axial direction of the installation channel.

[0014] Applying the technical solution of the present invention, by additionally providing an installation member, the connecting side of the installation member is connected to the outer wall of the transformer tank, and the installation side of the installation member is used to contact the installation flange, and the installation side and the connecting side are respectively located on opposite sides of the installation member. Even if the connecting side is welded to the transformer tank and there is a problem of excessive weld beads, it will not affect the connection between the installation side and the installation flange. Moreover, the connecting member is connected to the installation member by mechanical connection, which can avoid the appearance of weld beads on the installation side of the installation member. When the pressing member presses the installation flange against the outer wall of the transformer tank, it can avoid the problem of weld beads colliding with the high-voltage bushing. In this way, not only can the problem of the installation flange not fitting tightly against the outer wall of the transformer tank be avoided, thereby avoiding affecting the sealing fit between the installation flange and the outer wall of the transformer tank to avoid the problem of oil leakage of the high-voltage bushing; but also the problem of cracking and oil leakage caused by the high-voltage bushing material being damaged by weld beads can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0016] Figure 1 shows a schematic structural view of an embodiment of the high-voltage bushing assembly of the present utility model; and

[0017] Figure 2 shows Figure 1 the schematic structural view of the mounting member of the high-voltage bushing assembly of

[0018] Figure 3 shows Figure 2 the sectional view of the mounting member of

[0019] Figure 4 shows Figure 1 the schematic structural view of the sealing member of the high-voltage bushing assembly of

[0020] Figure 5 shows Figure 1 the schematic structural view of the limiting member of the high-voltage bushing assembly of

[0021] Figure 6 shows Figure 1 the schematic structural view of the pressing member of the high-voltage bushing assembly of

[0022] Figure 7 shows Figure 6 the sectional view of the pressing member of

[0023] Figure 8 shows Figure 1 the schematic structural view of the connecting member of the high-voltage bushing assembly of

[0024] Figure 9 shows Figure 1 the schematic structural view of the high-voltage bushing of the high-voltage bushing assembly of

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 1, pipe body; 2, mounting flange; 5, transformer box body; 10, mounting member; 11, mounting channel; 111, first hole section; 112, second hole section; 12, connecting side; 13, mounting side; 15, mounting hole; 20, connecting member; 30, pressing member; 50, limiting member; 70, sealing member; 71, anti-disengagement member. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in conjunction with the embodiments.

[0028] As Figures 1 to 9 shown, an embodiment of the present utility model provides an installation structure for a high-voltage bushing. The high-voltage bushing includes a tube body 1 and an installation flange 2 connected to the outer periphery of the tube body 1. The installation structure for the high-voltage bushing includes an installation member 10, a connection member 20, and a pressing member 30. Among them, the installation member 10 has an installation channel 11 and a connection side 12 and an installation side 13 oppositely arranged along the axial direction of the installation channel 11. The connection side 12 is connected to the outer wall of the transformer tank 5, and the installation channel 11 is used for installing the tube body 1; the pressing member 30 is located on the installation side 13 of the installation member 10. One end of the connection member 20 is mechanically connected to the installation member 10, and the other end of the connection member 20 is connected to the pressing member 30. The pressing member 30 is used to press the installation flange 2 against the installation side 13 of the installation member 10.

[0029] In the above technical solution, by additionally providing the installation member 10, the connection side 12 of the installation member 10 is connected to the outer wall of the transformer tank 5, the installation side 13 of the installation member 10 is used to contact the installation flange 2, and the installation side 13 and the connection side 12 are respectively located on opposite sides of the installation member 10. Even if the connection side 12 is welded to the transformer tank 5, it will not affect the connection between the installation side 13 and the installation flange 2. Moreover, the connection member 20 is mechanically connected to the installation member 10, which can avoid the appearance of welding beads on the installation side 13 of the installation member 10. When the pressing member 30 presses the installation flange 2 against the outer wall of the transformer tank 5, the problem of the welding bead colliding with the high-voltage bushing can be avoided. In this way, not only can the problem that the installation flange 2 does not fit tightly against the outer wall of the transformer tank 5 be avoided, thereby avoiding affecting the sealing fit between the installation flange 2 and the outer wall of the transformer tank 5, and further avoiding the problem of oil leakage of the high-voltage bushing; but also the problem of cracking and oil leakage caused by the high-voltage bushing material being damaged by the welding bead can be avoided.

[0030] It should be noted that in the embodiments of the present utility model, mechanical connection means riveting or interference connection or threaded connection.

[0031] It should be noted that in the embodiments of the present utility model, the high-voltage bushing is a fully insulated C-type bushing, which is matched with a cable front joint (C-type) of 35KV and specification QJC-635 or other cable joints of the same standard.

[0032] It should be noted that in the embodiments of the present utility model, the installation flange 2 and the tube body 1 are integrally formed.

[0033] As Figure 2 and Figure 3As shown in the figure, in the embodiment of the present utility model, the mounting side 13 of the mounting member 10 is provided with a mounting hole 15, and the connecting member 20 is threadedly connected to the mounting hole 15. In this way, the method of welding the connecting member 20 to the mounting side 13 of the mounting member 10 can be avoided, thereby avoiding the generation of welding beads.

[0034] Preferably, as Figure 8 shown, in the embodiment of the present utility model, the connecting member 20 is a stud, and the mounting hole 15 is a blind hole; the stud is preferably a stainless steel stud, so that the surface anti-corrosion ability can be improved and rusting can be avoided.

[0035] As Figure 1 shown, in the embodiment of the present utility model, the pressing member 30 is provided with an assembly through hole, and the high-voltage bushing mounting structure further includes an anti-disengagement member 71 located on the side of the pressing member 30 away from the mounting member 10, and the connecting member 20 passes through the assembly through hole and is connected to the anti-disengagement member 71.

[0036] Through the above settings, the connecting member 20 can be connected to the pressing member 30, so that the mounting flange 2 can be pressed against the outer wall of the transformer tank 5 by the pressing member 30.

[0037] Specifically, in the embodiment of the present utility model, there are multiple connecting members 20, and the multiple connecting members 20 are arranged at intervals along the circumferential direction of the mounting channel 11; there are multiple anti-disengagement members 71, and the multiple anti-disengagement members 71 are arranged corresponding to the multiple connecting members 20; there are multiple mounting holes 15, and the multiple mounting holes 15 are arranged corresponding to the multiple connecting members 20.

[0038] Preferably, in the embodiment of the present utility model, the anti-disengagement member 71 is a nut, and the connecting member 20 is threadedly connected to the anti-disengagement member 71.

[0039] In the prior art, technicians generally use a wrench to screw the anti-disengagement member 71 onto the connecting member 20. On the one hand, for screwing multiple anti-disengagement members 71, the torque for each screwing is different, which easily leads to the problem of uneven pressing force of the pressing member 30 on the mounting flange 2, resulting in uneven force when the gasket between the mounting flange 2 and the transformer tank 5 is compressed, and further resulting in oil leakage. On the other hand, due to manual screwing, it is difficult to control the acting force of the anti-disengagement member 71 on the pressing member 30, and it is easy to have the problem that the pressing member 30 is overly pressed on the mounting flange 2, so that the gasket between the mounting flange 2 and the transformer tank 5 is compressed too much, resulting in a hard connection between the high-voltage bushing and the transformer tank 5, and further easily resulting in oil leakage due to poor sealing.

[0040] Therefore, as Figure 1 and 5As shown, in the embodiment of the present utility model, the installation structure for the high-voltage bushing further includes: a limiting member 50, installed between the installation member 10 and the pressing member 30. One end of the limiting member 50 contacts the installation member 10, and the other end of the limiting member 50 contacts the pressing member 30 to limit the distance between the pressing member 30 and the installation member 10.

[0041] Through the above arrangement, the distance between the pressing member 30 and the limiting member 50 can be limited. In this way, on the one hand, the pressing force of the pressing member 30 acting on the installation flange 2 can be made more uniform, so as to avoid the situation of the pressing member 30 being skewed, thereby avoiding the problem of oil leakage caused by uneven stress when the gasket between the installation flange 2 and the installation member 10 is compressed; on the other hand, the problem of the pressing member 30 overly pressing on the installation flange 2 can be avoided, thereby avoiding the problem of the gasket between the installation flange 2 and the installation member 10 being overly compressed, which may lead to hard connection between the high-voltage bushing and the installation member 10, and further avoiding the problem of oil leakage caused by poor sealing; on the other hand, the problem of the installation flange 2 being overly stressed, which may cause cracking of the high-voltage bushing, can also be avoided, thereby avoiding the problem of cracking and oil leakage.

[0042] Specifically, in the embodiment of the present utility model, there are multiple limiting members 50, and the multiple limiting members 50 are correspondingly arranged with the multiple connecting members 20.

[0043] As Figure 5 shown, in the embodiment of the present utility model, the limiting member 50 is a limiting sleeve, and the limiting sleeve is located on the outer periphery of the connecting member 20. In this way, it is convenient for installation.

[0044] Preferably, in the embodiment of the present utility model, the limiting sleeve is made of stainless steel 316.

[0045] As Figure 1 shown, in the embodiment of the present utility model, the connecting side 12 of the installation member 10 is welded to the transformer tank 5. In this way, it is convenient to install the installation structure for the high-voltage bushing on the transformer tank 5.

[0046] Preferably, in the embodiment of the present utility model, the connecting side 12 of the installation member 10 is attached to the outer wall of the transformer tank 5 to achieve horizontal installation of the high-voltage bushing.

[0047] As Figure 3 shown, in the embodiment of the present utility model, from the connecting side 12 to the installation side 13, the installation channel 11 includes a first hole section 111 and a second hole section 112 connected in sequence, and the inner diameter of the first hole section 111 is larger than the inner diameter of the second hole section 112.

[0048] In the above technical solution, the connection side 12 of the mounting member 10 is welded to the outer wall of the transformer tank 5, and the first hole section 111 can be used to accommodate the welding scar. In this way, on the one hand, the safety distance between the high-voltage bushing and the inside of the transformer tank 5 can be increased, and on the other hand, the creepage distance of the high-voltage bushing is ensured.

[0049] Specifically, in the embodiment of the present invention, the pressing member 30 includes a pressing plate and a plurality of reinforcing plates connected to the pressing plate. Each reinforcing plate is arranged at an angle with the pressing plate. The pressing plate is provided with a mounting through hole for passing through the pipe body 1. The plurality of reinforcing plates are sequentially arranged along the circumference of the mounting through hole. In this way, while improving the strength of the pressing member 30, the mass of the pressing member 30 can be reduced. Preferably, the pressing member 30 is formed by bending a plate-shaped structure.

[0050] Preferably, in the embodiment of the present invention, the thickness of the pressing plate is 2 mm to 3 mm.

[0051] As Figure 1 shown, the embodiment of the present invention provides a high-voltage bushing assembly. The high-voltage bushing assembly includes a high-voltage bushing and the above-mentioned mounting structure for mounting the high-voltage bushing on the transformer tank 5. The above high-voltage bushing assembly has all the advantages of the above-mentioned mounting structure for the high-voltage bushing.

[0052] As Figure 4 and Figure 9 shown, in the embodiment of the present invention, the side of the mounting flange 2 facing the mounting member 10 is provided with a mounting groove. The high-voltage bushing further includes a sealing member 70 located on the outer periphery of the pipe body 1. The sealing member 70 is located in the mounting groove. In this way, a sealing fit between the high-voltage bushing and the mounting member 10 can be achieved, so that the high-voltage bushing can be sealed and mounted on the outer wall of the transformer tank 5.

[0053] Preferably, in the embodiment of the present invention, the sealing member 70 is a sealing rubber strip.

[0054] As Figure 4 and Figure 5 shown, in the embodiment of the present invention, when the mounting structure for the high-voltage bushing further includes a limiting member, the length of the limiting member 50 in the axial direction of the mounting channel 11 is L, and L satisfies the formula: H + (1 - 35%)D - B ≤ L ≤ H + (1 - 25%)D - B; where H is the thickness of the mounting flange 2 in the axial direction of the mounting channel 11, D is the thickness of the sealing member 70 in the axial direction of the mounting channel 11, and B is the depth of the mounting groove in the axial direction of the mounting channel 11. In this way, the compression amount of the sealing member 70 can be controlled between 20% and 40%, so as to ensure good sealing between the high-voltage bushing and the mounting member 10.

[0055] Preferably, in the embodiment of the present utility model, L = H+(1 - 30%)D - B, that is, the compression amount of the sealing member 70 is preferably 30%.

[0056] Preferably, in the embodiment of the present utility model, the sealing member 70 is a gasket. In one embodiment, the sealing member 70 can also be an O-ring seal.

[0057] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: By additionally providing an installation member, the connection side of the installation member is connected to the outer wall of the transformer tank, and the installation side of the installation member is used to contact the installation flange, and the installation side and the connection side are respectively located on opposite sides of the installation member. Even if the connection side is welded to the transformer tank and there is a problem of excessive weld beads, it will not affect the connection between the installation side and the installation flange. Moreover, the connection member is connected to the installation member by a mechanical connection method, which can avoid the appearance of weld beads on the installation side of the installation member. When the pressing member presses the installation flange against the outer wall of the transformer tank, it can avoid the problem of the weld beads colliding with the high-voltage bushing. In this way, not only can the problem of the installation flange not fitting tightly against the outer wall of the transformer tank be avoided, thereby avoiding affecting the sealing fit between the installation flange and the outer wall of the transformer tank to avoid the problem of oil leakage from the high-voltage bushing; but also the problem of cracking and oil leakage caused by the high-voltage bushing material being damaged by the weld beads can be avoided.

[0058] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mounting structure for a high-voltage bushing, the high-voltage bushing comprising a tube body (1) and a mounting flange (2) connected to the outer periphery of the tube body (1), characterized in that: The high voltage bushing installation structure comprises: The mounting member (10) comprises a mounting channel (11) and a connecting side (12) and a mounting side (13) which are arranged opposite to each other along the axial direction of the mounting channel (11), wherein the connecting side (12) is connected to the outer wall of the transformer box (5), and the mounting channel (11) is used for mounting the pipe body (1); A connecting member (20); A clamping member (30) is located on the mounting side (13) of the mounting member (10), one end of the connecting member (20) is mechanically connected to the mounting member (10), and the other end of the connecting member (20) is connected to the clamping member (30), and the clamping member (30) is used to clamp the mounting flange (2) to the mounting side (13) of the mounting member (10).

2. The high voltage bushing installation structure according to claim 1, characterized in that: The mounting side (13) of the mounting component (10) is provided with a mounting hole (15), and the connecting component (20) is threadedly connected to the mounting hole (15).

3. The high voltage bushing installation structure according to claim 1, characterized in that: The clamping member (30) is provided with an assembly through hole, and the high-voltage bushing installation structure further comprises an anti-slip component (71) located on a side of the clamping member (30) away from the installation member (10), and the connecting member (20) passes through the assembly through hole and is connected to the anti-slip component (71).

4. The high voltage bushing installation structure according to any one of claims 1 to 3, characterized in that: The high voltage bushing installation structure also includes: A limiting member (50) is installed between the mounting member (10) and the pressing member (30), one end of the limiting member (50) contacts the mounting member (10), and the other end of the limiting member (50) contacts the pressing member (30) to limit the distance between the pressing member (30) and the mounting member (10).

5. The high voltage bushing installation structure according to claim 4, characterized in that: The limiting component (50) is a limiting sleeve, and the limiting sleeve is located on the outer periphery of the connecting component (20).

6. The high voltage bushing installation structure according to any one of claims 1 to 3, characterized in that: The connection side (12) of the mounting component (10) is connected to the transformer box (5) by welding.

7. The high voltage bushing installation structure according to claim 6, characterized in that: From the connection side (12) to the installation side (13), the installation channel (11) comprises a first hole section (111) and a second hole section (112) connected in sequence, and the inner diameter of the first hole section (111) is greater than the inner diameter of the second hole section (112).

8. A high voltage bushing assembly, characterized in that: The invention comprises the high voltage bushing and a high voltage bushing mounting structure according to any one of claims 1 to 7 for mounting the high voltage bushing on a transformer box (5).

9. The high voltage bushing assembly according to claim 8, characterized in that: A mounting groove is provided on one side of the mounting flange (2) facing the mounting component (10), and the high-voltage bushing further comprises a sealing component (70) located on the outer periphery of the tube body (1), wherein the sealing component (70) is located in the mounting groove.

10. The high voltage bushing assembly according to claim 9, characterized in that: When the high-voltage bushing installation structure further includes a limiting component (50), the length of the limiting component (50) in the axial direction of the installation channel (11) is L, and L satisfies the formula: H+(1-35%)D-B≤L≤H+(1-25%)D-B; wherein H is the thickness of the installation flange (2) in the axial direction of the installation channel (11), D is the thickness of the sealing component (70) in the axial direction of the installation channel (11), and B is the depth of the installation groove in the axial direction of the installation channel (11).

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