CN220122550U - Air cable box of oil immersed transformer sleeve - Google Patents

Abstract

The utility model discloses an air cable box of an oil immersed transformer bushing, which comprises a frame and a platy skin; the frame is formed by assembling a plurality of support rods, a containing cavity is formed in the frame, and a plurality of openings communicated with the containing cavity are formed by surrounding the plurality of support rods; a plate-shaped skin shielding the openings is arranged at the positions outside the frame corresponding to the openings, and the plate-shaped skins and the frame are arranged at intervals so as to form gas channels between the plate-shaped skins and the frame, the gas channels are communicated with the openings corresponding to the gas channels, and a ventilation gap communicated with the gas channels is formed between any two adjacent plate-shaped skins; one of the plate-shaped skins is provided with a first through hole for the transformer bushing to pass through. The air channel is convenient for air circulation, so that the temperature in the accommodating cavity is kept more stable, and the potential safety hazard is reduced. In addition, the thickness of the platy skin is reduced under the condition that the bearing capacity requirement of the air cable box is met, and the dead weight and the cost of the air cable box are effectively reduced.

Description

Air cable box of oil immersed transformer sleeve

Technical Field

The utility model relates to the technical field of transformers, in particular to an air cable box of an oil immersed transformer bushing.

Background

The oil immersed transformer sleeve pipe is qualified for next round of competitions and often adopts air cable box structure, installs the subassembly such as oil immersed transformer sleeve pipe, copper bar and pillar insulator in sealed cable box, can prevent that above subassembly from receiving the pollution, reinforcing transformer operation's security.

Most of the existing air cable boxes are formed into a sealed box body by assembling and welding steel plates, however, condensed water is easily generated in the sealed air cable boxes due to overlarge temperature difference between day and night, the insulation reliability of the sleeve and the post insulator is reduced, and potential safety hazards are caused. In addition, in order to meet the structural load-bearing capacity requirement, the steel plates forming the air cable box are generally thicker, so that the whole air cable box is larger in dead weight and higher in cost.

Disclosure of Invention

The utility model mainly aims to provide an air cable box of an oil immersed transformer sleeve, and aims to solve the technical problems of potential safety hazard, large dead weight and high cost of the air cable box in the prior art due to box body sealing.

In order to achieve the above object, the air cable box of the oil immersed transformer bushing provided by the present utility model includes: the frame is formed by assembling a plurality of support rods which are arranged vertically and horizontally, a containing cavity is formed in the frame, and a plurality of openings communicated with the containing cavity are formed by surrounding the support rods; the outer part of the frame is provided with a plate-shaped skin which shields the openings at the positions corresponding to the openings, and the plate-shaped skins and the frame are arranged at intervals so as to form gas channels between the plate-shaped skins and the frame, the gas channels are communicated with the openings corresponding to the gas channels, and a ventilation gap communicated with the gas channels is formed between any two adjacent plate-shaped skins; one of the plate-shaped skins is provided with a first through hole for the transformer bushing to pass through, and the first through hole is communicated with the corresponding gas channel.

Optionally, the edge of the plate-shaped skin positioned at the top of the frame is downwards bent to form an annular water baffle, and the water baffle covers the outside of the plate-shaped skin adjacent to the water baffle; the plate-shaped skin positioned at the bottom of the frame is provided with the first through hole.

Optionally, the length of the downward extension of the water baffle is 20 mm-40 mm.

Optionally, a first flange and a second flange are installed on the plate-shaped skin at the bottom of the frame, the first flange is arranged corresponding to the first through hole, and the second flange is arranged at intervals with the first flange.

Optionally, a distance between each of the plate-shaped skins and the frame is 5mm to 15mm.

Optionally, the supporting rod is angle steel, and the thickness of the plate-shaped skin is smaller than that of the angle steel.

Optionally, the thickness of the plate-shaped skin is 2 mm-3 mm, and the thickness of the angle steel is 4 mm-8 mm.

Optionally, the frame is a cuboid frame, and the openings are respectively formed in the top, the bottom and the four side parts of the cuboid frame.

Optionally, the plate-shaped skin corresponding to one of the side portions is provided with a marking seat.

Optionally, the air cable box further comprises cable gland heads, wherein a second through hole for installing the cable gland heads is formed in one of the plate-shaped skins.

According to the technical scheme provided by the utility model, the air cable box of the oil immersed transformer sleeve consists of the frame and the plate-shaped skin, the plate-shaped skin is arranged on the frame and is arranged at intervals with the frame, and the air channel is formed between the frame and the plate-shaped skin, so that the accommodating cavity in the frame is of an open structure, and air circulation is facilitated, thereby keeping the temperature in the accommodating cavity more stable, effectively improving the operation stability of equipment in the air cable box, and reducing potential safety hazards. Meanwhile, the air cable box is mainly stressed by the frame participating in the structure, the plate-shaped skin is arranged on the periphery of the frame in a surrounding and separating mode, the structure is stressed less, and compared with the steel plates forming the air cable box in the prior art, the thickness of the plate-shaped skin is smaller; under the condition of meeting the bearing capacity requirement of the air cable box, the thickness of the plate-shaped skin can be reduced as much as possible, the dead weight of the air cable box is effectively reduced, and the material cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of an air cable box of an oil immersed transformer bushing according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of an air cable box of an oil immersed transformer bushing according to an embodiment of the present utility model;

FIG. 3 is a schematic top view of an air cable box of an oil immersed transformer bushing according to an embodiment of the present utility model;

fig. 4 is a schematic view showing a detailed structure of a water baffle according to an embodiment of the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Frame	30	Accommodating cavity
11	Support bar	40	Ventilation gap
				20	Plate-shaped skin	50	Transformer bushing
21	Water baffle	60	Sign seat
				22	First flange	70	Cable gram head
23	Second flange

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The description of the orientations such as "up", "down", etc. in the present utility model is based on the orientation shown in fig. 1, and is merely for explaining the relative positional relationship between the components in the posture shown in fig. 1, and if the specific posture is changed, the directional indication is changed accordingly.

The utility model provides an air cable box of an oil immersed transformer bushing, which comprises a frame and a platy skin; the frame is formed by assembling a plurality of support rods, a containing cavity is formed in the frame, and a plurality of openings communicated with the containing cavity are formed by surrounding the plurality of support rods; a plate-shaped skin shielding the openings is arranged at the positions outside the frame corresponding to the openings, and the plate-shaped skins and the frame are arranged at intervals so as to form gas channels between the plate-shaped skins and the frame, the gas channels are communicated with the openings corresponding to the gas channels, and a ventilation gap communicated with the gas channels is formed between any two adjacent plate-shaped skins; one of the plate-shaped skins is provided with a first through hole for the transformer bushing to pass through, and the first through hole is communicated with the corresponding gas channel.

As shown in fig. 1, the frame comprises a plurality of support rods which are transversely arranged and longitudinally arranged, and the plurality of support rods which are longitudinally and longitudinally arranged are connected with each other to form a stable frame structure body and a containing cavity inside the frame. A plurality of plate skins are mounted on the support bars of the frame to conceal the openings of the frame, and in one embodiment, the plate skins are riveted to the frame. The plate-shaped Meng Pizhao is arranged on the periphery of the frame, the plate-shaped skins are arranged corresponding to the openings of the frame and are spaced a certain distance from the frame, air channels are formed between the plate-shaped skins and the corresponding openings, ventilation gaps are formed between the same plate-shaped skin and the adjacent plate-shaped skins, the air channels are communicated with the adjacent ventilation gaps, and the accommodating cavities in the frame can be communicated with the outside, so that the air cable box is in a non-sealing layout.

The inside air of air cable box can circulate with the external world for the inside temperature conduction of air cable box is faster, thereby can avoid the inside and outside difference in temperature of air cable box to big as far as possible to produce water smoke, and equipment insulating properties reduces and exists the problem that leads to the potential safety hazard. In addition, the air cable box is mainly stressed by a frame, and the platy skin mainly plays roles of enclosing and separating; the plate-like skin structure is less stressed and has a smaller thickness than the steel plates constituting the air cable box in the prior art. According to the technical scheme, the thickness of the plate-shaped skin can be reduced as much as possible on the premise that the frame meets the bearing capacity requirement, so that the dead weight of the air cable box is reduced, and the material cost is saved.

In one embodiment, the edge of the plate-shaped skin positioned at the top of the frame is downwards bent to form an annular water baffle, and the water baffle covers the outer part of the plate-shaped skin adjacent to the water baffle; the plate-shaped skin at the bottom of the frame is provided with a first through hole.

As shown in fig. 4, the plate-like skin on top of the frame extends outwardly with respect to the frame so that the plate-like skin on top of the frame can cover the gas passages on the side of the frame without interfering with the gas passages on top of the frame communicating with the gas passages on the side of the frame. The edges of the plate-shaped skin are bent downwards to form a water baffle, and the length of the water baffle is larger than the width of the gas channel at the top, so that the water baffle extends downwards to the outside of the plate-shaped skin with the side surface adjacent to the water baffle.

The breakwater extends downwards, and the plate-shaped skin at the top can cover the whole frame and the plate-shaped skin at the side surface, so that rainwater can drop from the lower edge of the breakwater, rainwater is effectively prevented from penetrating into the air cable box, and the accommodating cavity is kept dry.

In one embodiment, the water deflector extends downwardly for a length of 20mm to 40mm.

It is worth noting that the length of the downward extending water baffle needs to be larger than the width of the top gas channel, so that the water baffle can cover side rainwater and simultaneously does not prevent the gas channels from being communicated with each other, gas can flow in all directions, the inside of the accommodating cavity is kept dry, and the temperature difference between the inside and the outside is small. Preferably, the water deflector extends downwardly for a length of 30mm.

In an embodiment, a first flange and a second flange are mounted on the plate-shaped skin at the bottom of the frame, the first flange is arranged corresponding to the first through hole, and the second flange is arranged at intervals from the first flange.

As shown in fig. 3, a first through hole for the transformer bushing to pass through is formed in the plate-shaped skin at the bottom, the first through hole is arranged at the rear side of the plate-shaped skin at the bottom, and a first flange is mounted outside the first through hole and is used for matching with a flange on the oil tank so as to connect the transformer bushing with the oil tank. The front side of the plate-shaped skin at the bottom is also provided with second flanges for being connected with the lower structure, in one embodiment, the number of the second flanges is two, and the two second flanges are respectively arranged at the left side and the right side of the plate-shaped skin at the bottom.

The air cable box is connected with the structure of the lower part of the air cable box through the first flange and the second flanges, so that the air cable box is firmly connected with the lower structure, and meanwhile, the first flange and the two second flanges serve as supports of the air cable box and support the air cable box, so that the air cable box is kept fixed.

In one embodiment, the distance between each plate-like skin and the frame is 5mm to 15mm.

The distance between each plate-shaped skin and the corresponding frame is the width of the air channel, and the distance between the plate-shaped skin and the frame is kept moderate, so that the air channel has enough width to meet the ventilation, and meanwhile, external pollutants are not easy to enter the accommodating cavity. And, the distance between the platy skin at the top and the corresponding frame is smaller than the downward extending length of the water baffle, so that the water baffle can block the rainwater at the side face. Preferably, the distance between each plate-like skin and its corresponding frame is 10mm.

In one embodiment, the support bar is angle steel and the thickness of the plate-shaped skin is smaller than the thickness of the angle steel.

The size of the supporting rod is selected to meet the bearing capacity requirement of the air cable box, and the plate-shaped skin only plays a role in enclosing, so that the thickness of the plate-shaped skin can be smaller than that of the supporting rod, the thickness of the plate-shaped skin can be reduced as much as possible, the dead weight of the air cable box is reduced, and the material cost is saved.

In one embodiment, the thickness of the plate-shaped skin is 2 mm-3 mm, and the thickness of the angle steel is 4 mm-8 mm.

The plate-shaped skin itself needs to have a certain strength to prevent deformation during use; the angle steel can be flexibly selected according to the size and the stress of the air cable box so as to meet the requirement of bearing capacity. Preferably, the plate-shaped skin is an aluminum-zinc plated plate with the thickness of 2.5mm, and the angle steel used as the supporting rod is an angle steel with the thickness of 70mm multiplied by 7mm, so that the thickness of the plate-shaped skin is the thinnest and the dead weight of the air cable box is the smallest on the premise that the air cable box meets the bearing capacity requirement.

In an embodiment, the frame is a cuboid frame, and openings are formed in the top, the bottom and the four sides of the cuboid frame.

The shape of the air cable box is mainly determined according to the layout positions of the transformer bushing and related equipment, as shown in fig. 1, 2 and 3, in an embodiment, the air cable box is cuboid, the top, the bottom and four sides of the frame are respectively provided with a plate-shaped skin correspondingly, the cuboid frame forms a cuboid accommodating cavity, and the air cable box is high in space utilization and convenient to install.

In one embodiment, the plate-like skin corresponding to one of the side portions is provided with a marking seat.

Specifically, as shown in fig. 2 and 3, a plurality of transformer bushings are arranged on the rear side of the air cable box, a plurality of identification seats are arranged on the plate-shaped skin positioned on the rear side and correspond to the plurality of transformer bushings, the plurality of identification seats are arranged on the outer side of the plate-shaped skin, the identification seats are used for installing phase sequence cards of the transformer, and accordingly maintenance staff can clearly and intuitively identify phase sequences conveniently.

In one embodiment, the air cable box further comprises cable gland heads, wherein a second through hole for installing the cable gland heads is formed in one of the plate-shaped skins.

As shown in fig. 2, the cable gland is mounted on a plate-like skin at the bottom, and the cables in the air cable box pass through the cable gland and extend to the equipment in the lower part of the air cable box. The breakwater of air cable box can effectively prevent rainwater and cable contact, and structural setting is reasonable.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. An air cable box of an oil immersed transformer bushing, characterized in that the air cable box of the oil immersed transformer bushing comprises:

the frame is formed by assembling a plurality of support rods, a containing cavity is formed in the frame, and a plurality of openings communicated with the containing cavity are formed by surrounding the support rods;

the plate-shaped skins are arranged at positions outside the frame, corresponding to the openings, of the plate-shaped skins for shielding the openings, and are arranged at intervals between the plate-shaped skins and the frame, so that gas channels are formed between the plate-shaped skins and the frame, the gas channels are communicated with the openings corresponding to the gas channels, and a ventilation gap communicated with the gas channels is formed between any two adjacent plate-shaped skins; one of the plate-shaped skins is provided with a first through hole for the transformer bushing to pass through, and the first through hole is communicated with the corresponding gas channel.

2. The air cable box of an oil immersed transformer bushing according to claim 1, wherein an edge of the plate-shaped skin at the top of the frame is bent downwards to form an annular water baffle, and the water baffle covers the outer side of the plate-shaped skin adjacent to the water baffle; the plate-shaped skin positioned at the bottom of the frame is provided with the first through hole.

3. The air cable box of an oil immersed transformer bushing according to claim 2, wherein the water deflector extends downwards for a length of 20mm to 40mm.

4. The air cable box of an oil immersed transformer bushing according to claim 2, wherein a first flange and a second flange are mounted on the plate-shaped skin at the bottom of the frame, the first flange being disposed corresponding to the first through hole, and the second flange being disposed at a distance from the first flange.

5. The air cable box of an oil immersed transformer bushing according to claim 1, wherein a distance between each of the plate-like skins and the frame is 5mm to 15mm.

6. The air cable box of an oil immersed transformer bushing of claim 1, wherein the support bar is angle steel, and the thickness of the plate-shaped skin is smaller than the thickness of the angle steel.

7. The air cable box of an oil immersed transformer bushing according to claim 6, wherein the thickness of the plate-shaped skin is 2 mm-3 mm, and the thickness of the angle steel is 4 mm-8 mm.

8. The air cable box of an oil immersed transformer bushing according to any one of claims 1 to 7, wherein the frame is a cuboid frame, and the openings are all provided at the top, bottom and four sides of the cuboid frame.

9. The air cable box of an oil immersed transformer bushing according to claim 8, wherein a logo seat is provided on the plate-like skin corresponding to one of the side portions.

10. The air cable box of an oil immersed transformer bushing according to any one of claims 1 to 7, further comprising cable gland heads, wherein one of the plate-like skins is provided with a second through hole for mounting the cable gland heads.