CN217768059U - Anti-explosion flexible oil tank for oil-immersed transformer - Google Patents

Abstract

The utility model provides an antiknock flexible oil tank for oil-immersed transformer, this antiknock flexible oil tank's oil tank wall is multilayer structure, and antiknock flexible oil tank's oil tank wall includes: an inner isolation layer, a middle energy absorption layer and an outer support layer; the middle energy absorption layer is clamped between the inner isolation layer and the outer support layer, and is provided with a pore structure for absorbing impact energy by utilizing compression deformation of the pore structure so as to buffer the pressure impact of explosion inside the anti-explosion flexible oil tank; the inner isolation layer is used for isolating the middle energy absorption layer from oil in the anti-explosion flexible oil tank so as to prevent the oil from filling the pore structure of the middle energy absorption layer. The utility model provides an oil tank introduces flexibility, when receiving the superpressure and assaulting, takes place to warp, reduces oil tank internal pressure and realizes the protection to power equipment, protects oil-immersed power equipment effectively, avoids the oil tank to take place to warp greatly and break even, and then avoids the oil tank to break various serious consequences of bringing.

Description

Anti-explosion flexible oil tank for oil-immersed transformer

Technical Field

The utility model relates to an oil-immersed power equipment technical field particularly, relates to an antiknock flexible oil tank for oil-immersed transformer.

Background

Oil-immersed power equipment meets the insulation requirements through insulating oil, however, as the insulating properties of the insulating oil decrease, low resistance faults can cause arc discharge. Therefore, the insulating oil is vaporized and cracked, a large amount of high-temperature and high-pressure oil gas is quickly generated, and pressure waves are excited. As the pressure wave is transmitted, reflected and refracted in the oil tank, the pressure in the oil tank increases rapidly, which will destroy the power equipment and the oil tank. The rupture of the oil tank will lead to the uncontrollable leakage of high-temperature and high-pressure oil gas, which causes the danger of combustion and explosion and great damage to the environment and personnel.

To combat arc faults, existing tank design concepts focus on increasing tank stiffness. However, the existing oil-immersed power equipment oil tank cannot be designed and manufactured according to a pressure container and an arc fault overpressure value, the outer wall of the oil tank is very thick and heavy, the overall volume and weight of the oil tank are greatly increased, and the manufacturing cost of the oil tank is greatly improved. Meanwhile, the strength of the oil tank is too high, and when an arc fault occurs, the pressure in the oil tank is rapidly increased, so that each electric device in the oil tank is seriously damaged. The existing oil tank adopts thin-wall metal plates and reinforcing ribs, is limited by inherent mechanical properties of materials, has limited deformation degree, namely insufficient flexibility, only a small amount of electric arc energy is deformed and absorbed by the oil tank materials, and most of the electric arc energy still needs to be borne by an oil tank structure.

Disclosure of Invention

In view of this, the utility model provides an antiknock flexible oil tank for oil-immersed transformer aims at solving current oil tank and adopts thin wall sheet metal and strengthening rib to cause its not enough and electric arc energy to need the problem that the oil tank structure undertakes.

The utility model provides an antiknock flexible oil tank for oil-immersed transformer, the oil tank wall of antiknock flexible oil tank is multilayer structure, the oil tank wall of antiknock flexible oil tank includes: an inner isolation layer, a middle energy absorption layer and an outer support layer; the middle energy absorption layer is clamped between the inner isolation layer and the outer support layer, and is provided with a pore structure for absorbing impact energy by utilizing compression deformation of the pore structure so as to buffer pressure impact of explosion inside the anti-explosion flexible oil tank; the inner isolation layer is used for isolating the middle energy absorption layer from oil in the anti-explosion flexible oil tank so as to prevent the oil from filling the pore structure of the middle energy absorption layer.

Further, above-mentioned antiknock flexible oil tank for oil-immersed transformer, the middle energy absorbing layer includes: at least two porous structure layers; and a solid partition layer is arranged between any two adjacent porous structure layers and is used for partitioning the porous structure layers.

Further, in the anti-explosion flexible oil tank for the oil-immersed transformer, from the inner wall of the middle energy absorption layer to the outer wall of the middle energy absorption layer, the porosity of the porous structure layer in each porous structure layer is gradually decreased; the inner wall of the middle energy absorption layer is arranged close to the inner isolation layer, and the outer wall of the middle energy absorption layer is arranged close to the outer support layer.

Further, according to the anti-explosion flexible oil tank for the oil-immersed transformer, the strength of the porous structure layer in each porous structure layer is gradually increased from the inner wall of the middle energy absorption layer to the outer wall of the middle energy absorption layer.

Further, the porous structure layer is a foam metal layer.

Further, the anti-explosion flexible oil tank for the oil-immersed transformer is characterized in that the porous structure layer is a closed-cell foamed aluminum layer.

Further, in the anti-explosion flexible oil tank for the oil-immersed transformer, the middle energy absorption layer is a single-layer porous structure layer.

Further, according to the anti-explosion flexible oil tank for the oil-immersed transformer, the strength of the outer supporting layer is higher than that of the inner isolation layer.

Further, according to the anti-explosion flexible oil tank for the oil-immersed transformer, the outer supporting layer and/or the inner isolation layer are steel plate structure layers.

Further, according to the anti-explosion flexible oil tank for the oil-immersed transformer, the inner wall of the middle energy absorption layer is attached to the inner isolation layer, the outer wall of the middle energy absorption layer is attached to the outer support layer, and the middle energy absorption layer is connected with the inner isolation layer and the outer support layer respectively.

The utility model provides an antiknock flexible oil tank for oil-immersed transformer, through the inner isolation layer with explosion pressure impact evenly transmit to the middle energy absorption layer, and with the middle energy absorption layer with the separation between the fluid in the antiknock flexible oil tank, in order to prevent the fluid to fill the pore structure of middle energy absorption layer, and then avoid influencing the effect that middle energy absorption layer absorbed energy; the anti-explosion flexible oil tank is supported by the outer supporting layer, so that the integral mechanical reliability of the anti-explosion flexible oil tank is ensured; through set up middle energy absorption layer between interior isolation layer and outer supporting layer, be equipped with pore structure on the middle energy absorption layer, make middle energy absorption layer have certain flexible characteristic, especially usable pore structure carries out compression deformation and absorbs impact energy, the pressure impact of the inside explosion of buffering antiknock flexible oil tank, still can give way the inner space of container, can make the effective volume increase of antiknock flexible oil tank, and then reduce the interior pressure of antiknock flexible oil tank, porous material compression deformation absorbs pressure impact simultaneously, attenuate the catadioptric of pressure wave by a wide margin, the interior pressure of antiknock flexible oil tank can also be reduced. The anti-explosion flexible oil tank is a flexible container capable of resisting internal impact load, is used for absorbing impact energy through the flexible deformation of the container when the container is subjected to internal explosion, reduces the internal pressure of the container, buffers pressure impact, further protects the container and mechanical and electronic equipment in the container, and does not deform the container in a destructive manner; compare in current oily formula power equipment oil tank, this flexible oil tank of antiknock 1 introduces the flexibility, when the oil tank receives the superpressure impact promptly, can take place the appropriate deformation in the safety range, realize the protection to power equipment with reducing the oil tank internal pressure, and possess higher energy level electric arc fault tolerance, protect oily formula power equipment more effectively, avoid the oil tank to take place the heavy deformation even break simultaneously, avoid the oil tank to break various serious consequences that bring, and then avoid the oil tank to break various serious consequences that bring, avoid the oil tank appearance to take place the heavy deformation simultaneously.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of an anti-explosion flexible oil tank for an oil-immersed transformer according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 2 at A;

fig. 3 is a schematic structural diagram of an explosion occurring in the anti-explosion flexible oil tank for the oil-immersed transformer according to the embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure of FIG. 3 after an explosion at B;

fig. 5 is a schematic structural diagram of an anti-explosion flexible oil tank for an oil-immersed transformer according to an embodiment of the present invention;

fig. 6 is a partially enlarged view of C in fig. 5.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 6, it is a preferred structure of an antiknock flexible oil tank for an oil-immersed transformer according to an embodiment of the present invention. As shown in fig. 2, 4 and 6, the flexible anti-explosion fuel tank 1 is a tank structure formed by splicing a plurality of fuel tank walls, the fuel tank wall of the flexible anti-explosion fuel tank 1 may be a multi-layer structure, and the fuel tank wall of the flexible anti-explosion fuel tank 1 includes: an inner barrier layer 11, an intermediate energy absorbing layer 12 and an outer support layer 13; the middle energy absorption layer 12 is sandwiched between the inner isolation layer 11 and the outer support layer 13, and a pore structure (not shown in the figure) is arranged on the middle energy absorption layer 12 and is used for performing compression deformation to absorb impact energy by using the pore structure so as to buffer pressure impact of explosion inside the anti-explosion flexible oil tank 1; the inner isolation layer 11 is used for isolating the intermediate energy absorption layer 12 from oil in the anti-explosion flexible oil tank 1 so as to prevent the oil from filling the pore structure of the intermediate energy absorption layer 12.

During specific implementation, the inner isolation layer 11 is used for transmitting impact load to the middle energy absorption layer 12, especially, pressure impact can be uniformly transmitted, pressure concentration at a local position of the middle energy absorption layer 12 is avoided, meanwhile, the inner isolation layer 11 also isolates the middle energy absorption layer from oil in the anti-explosion flexible oil tank 1, so that the oil is prevented from filling a pore structure of the middle energy absorption layer 12, and the effect of the middle energy absorption layer 12 on energy absorption is further prevented from being influenced. The middle energy absorbing layer 12 can adopt porous structure material, be equipped with the pore structure on the middle energy absorbing layer 12 promptly, utilize the pore structure to carry out compression deformation, certain flexibility has, can carry out flexible deformation, through absorbing impact energy and buffer pressure from flexible deformation and assaulting, still can give way the inner space of container, can make the effective volume increase of flexible oil tank 1 of antiknock, and then reduce the interior pressure of flexible oil tank 1 of antiknock, porous material compression deformation absorbs pressure impact simultaneously, attenuate the catadioptric of pressure wave by a wide margin, also can reduce the interior pressure of flexible oil tank 1 of antiknock. The outer supporting layer 13 plays a supporting role so as to provide enough support for the anti-explosion flexible oil tank 1; meanwhile, due to the energy absorption and buffering effects of the middle energy absorption layer 12, the deformation of the outer support layer 13 is reduced, the outer support layer 13 is only slightly deformed, and the overall anti-explosion capability of the anti-explosion flexible oil tank 1 is greatly improved. In fig. 3 and 4, the arrows indicate the direction of the impact load when an explosion occurs; as shown in fig. 4, the deformation of the inner insulating layer 11, the intermediate energy absorbing layer 12 and the outer support layer 13 after the explosion is gradually reduced.

In this embodiment, the fuel tank wall of the anti-explosion flexible fuel tank 1 may adopt a multilayer sandwich structure, any two adjacent layers are tightly attached to each other, and any two adjacent layers are connected to each other, that is, an inner wall (a right side wall shown in fig. 2) of the intermediate energy absorption layer 12 is tightly attached to the inner isolation layer 11, an outer wall (a left side wall shown in fig. 2) of the intermediate energy absorption layer 12 is tightly attached to the outer support layer 13, and the intermediate energy absorption layer 12 is respectively connected to the inner isolation layer 11 and the outer support layer 13, for example, the inner isolation layer 11 and the inner wall of the intermediate energy absorption layer 12 may be bonded by glue, or may be fixedly connected by other connection methods, such as welding, etc., the outer wall of the intermediate energy absorption layer 12 and the outer support layer 13 may be bonded by glue, or may be fixedly connected by other connection methods, such as welding, etc., and the connection method between any two adjacent layers is not limited in this embodiment. The middle energy absorption layer 12 is respectively connected with the inner isolation layer 11 and the outer support layer 13, so that the explosion-proof energy absorption layer can be tightly attached when deforming.

In this embodiment, both the outer supporting layer 13 and the inner isolating layer 11 may be a metal layer, such as a steel plate structure layer, or may be other materials, which is not limited in this embodiment. In order to further improve the supporting strength of the outer supporting layer 13, preferably, the outer supporting layer 13 is made of a material with higher strength, so as to further ensure that the anti-explosion flexible oil tank 1 provides sufficient support, and meanwhile, the pressure difference between the inside and the outside of the anti-explosion flexible oil tank 1 can be borne, and the mechanical reliability of the anti-explosion flexible oil tank 1 is improved; the inner isolation layer 11 is made of a material with low strength and can perform large flexible deformation so as to ensure that the inner isolation layer 11 can uniformly transmit impact load to the middle energy absorption layer 12; preferably, the thickness of the outer support layer 13 may be greater than the thickness of the inner isolation layer 11 to further ensure that the strength of the outer support layer 13 is higher than the strength of the inner isolation layer 11.

In one embodiment of the intermediate energy-absorbing layer 12 of this embodiment, as shown in fig. 2, the intermediate energy-absorbing layer 12 is a single-layer porous structure layer, and the porous structure layer is provided with a pore structure, so that the pore structure can be compressed and deformed to absorb the impact energy. Wherein, the two side walls (the left side wall and the right side wall as shown in fig. 2) of the porous structure layer are respectively connected to the inner isolation layer 11 and the outer support layer 13. In this embodiment, the porous structure layer may be a foamed metal layer, such as a foamed aluminum layer or a foamed steel layer, preferably a foamed aluminum layer, which has a higher toughness than the foamed steel layer, and may increase the deformation of the porous structure layer. In this embodiment, the porous structure layer may be a closed cell foam metal layer, which may isolate the honeycomb structures from each other compared to an open cell foam metal layer, which may have a better energy absorption effect; further preferably, the porous structure layer may be a closed cell foamed aluminium layer.

In another embodiment of the intermediate energy-absorbing layer 12 of this embodiment, as shown in fig. 6, the intermediate energy-absorbing layer 12 may be a multi-layer structure, and the intermediate energy-absorbing layer 12 includes: at least two porous structure layers 121; each porous structure layer 121 is provided with a pore structure, and a solid partition layer 122 is provided between any two adjacent porous structure layers 121, for partitioning between the porous structure layers 121. Specifically, each porous structure layer 121 is provided with a pore structure, and the pore structure can be compressed and deformed to absorb impact energy. The solid dividing layer 122 is arranged between any two adjacent porous structure layers 121, so that connection between two adjacent porous structure layers 121 is achieved, particularly connection between two porous structure layers 121 with different porosities and pore positions is achieved, and meanwhile, impact force between two adjacent porous structure layers 121 can be uniformly transmitted through the solid dividing layer 122. The solid dividing layer 122 may be a solid metal layer such as an aluminum layer or a steel layer, or may be made of other materials, and the material of the solid dividing layer 122 is not limited in this embodiment.

In this embodiment, as shown in fig. 6, the left sidewall of the leftmost porous structure layer 121 is connected to the outer support layer 13, the right sidewall of the rightmost porous structure layer 121 is connected to the inner isolation layer 11, and the two sidewalls are bonded by glue or fixedly connected by other connection methods, such as welding, etc., and the connection method between any two adjacent layers is not limited in this embodiment; the two side walls (the left and right side walls shown in fig. 6) of the solid partition layer 122 are respectively tightly attached to the porous structure layer 121 on the two sides, and are connected to the porous structure layer 121, and may be bonded by glue or fixedly connected by other connection methods, such as welding, etc., and the connection method between any two adjacent layers is not limited in this embodiment.

In the present embodiment, from the inner wall of the middle energy absorption layer 12 to the outer wall of the middle energy absorption layer 12, i.e. from right to left as shown in fig. 6, the porosity of the porous structure layer 121 in each of the porous structure layers 121 gradually decreases, i.e. the porosity of the porous structure layer 121 on the right side is greater than the porosity of the porous structure layer 121 on the left side, so that from right to left, the porosity of each of the porous structure layers 121 in each of the porous structure layers 121 gradually decreases; wherein the inner wall of the intermediate energy absorbing layer 12 is disposed adjacent to the inner barrier layer 11, i.e. the right side wall as shown in fig. 6, and the outer wall of the intermediate energy absorbing layer 12 is disposed adjacent to the outer support layer 13, i.e. the left side wall as shown in fig. 6.

In the present embodiment, the strength of the porous structure layers 121 in each of the porous structure layers 121 is gradually increased from the inner wall of the intermediate energy-absorbing layer 12 to the outer wall of the intermediate energy-absorbing layer 12, i.e., from right to left as shown in fig. 6, so that the deformation of each of the porous structure layers 121 in each of the porous structure layers 121 is further gradually reduced from right to left.

In this embodiment, the porous structure layer may be a foamed metal layer, such as a foamed aluminum layer or a foamed steel layer, preferably a foamed aluminum layer, which has a higher toughness than the foamed steel layer, and may increase the deformation of the porous structure layer. In this embodiment, the porous structure layer may be a closed-cell foam metal layer, and compared with an open-cell foam metal layer, the closed-cell foam metal layer may isolate the nest structures from each other, and compared with the open-cell foam metal layer, the energy absorption effect is better; further preferably, the porous structure layer may be a closed cell foamed aluminium layer.

In summary, in the anti-explosion flexible oil tank for the oil-immersed transformer provided in this embodiment, the inner isolation layer 11 uniformly transmits the explosion pressure impact to the intermediate energy absorption layer 12, and isolates the intermediate energy absorption layer from the oil in the anti-explosion flexible oil tank 1, so as to prevent the oil from filling the pore structure of the intermediate energy absorption layer 12, and further avoid affecting the energy absorption effect of the intermediate energy absorption layer 12; the anti-explosion flexible oil tank 1 is supported by an outer supporting layer 13, so that the overall mechanical reliability of the anti-explosion flexible oil tank 1 is ensured; through set up middle energy absorption layer 12 between inner isolation layer 11 and outer supporting layer 13, be equipped with pore structure on middle energy absorption layer 12, make middle energy absorption layer 12 have certain flexible characteristic, especially usable pore structure carries out compression deformation and absorbs impact energy, the pressure shock of the inside explosion of the flexible oil tank of buffering antiknock, still can give way the inner space of container, can make the effective volume increase of the flexible oil tank 1 of antiknock, and then reduce the interior pressure of the flexible oil tank 1 of antiknock, porous material compression deformation absorbs pressure shock simultaneously, attenuate the catadioptric of pressure wave by a wide margin, also can reduce the interior pressure of the flexible oil tank 1 of antiknock. The anti-explosion flexible oil tank 1 is a flexible container capable of resisting internal impact load, and is used for absorbing impact energy through flexible deformation of the container when the container is subjected to internal explosion, reducing the internal pressure of the container, buffering pressure impact, further protecting the container and mechanical and electronic equipment in the container, and preventing the container from destructive large deformation; compared with the existing oil-immersed power equipment oil tank, the antiknock flexible oil tank 1 is flexible, namely, when the oil tank is impacted by overpressure, the oil tank is properly deformed within a safety range, so that the protection of power equipment is realized by reducing the pressure in the oil tank, the fault tolerance of electric arc faults with higher energy level is achieved, the oil-immersed power equipment is protected more effectively, the oil tank is prevented from being deformed greatly and even broken, and various serious consequences caused by the broken oil tank are avoided.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The utility model provides an antiknock flexible oil tank for oil-immersed transformer which characterized in that, the oil tank wall of antiknock flexible oil tank is multilayer structure, the oil tank wall of antiknock flexible oil tank includes: an inner isolation layer, a middle energy absorption layer and an outer support layer; wherein the content of the first and second substances,

the middle energy absorption layer is clamped between the inner isolation layer and the outer support layer, and a pore structure is arranged on the middle energy absorption layer and used for carrying out compression deformation to absorb impact energy by utilizing the pore structure so as to buffer the pressure impact of the explosion inside the anti-explosion flexible oil tank;

the inner isolation layer is used for isolating the middle energy absorption layer from oil in the anti-explosion flexible oil tank so as to prevent the oil from filling the pore structure of the middle energy absorption layer.

2. The antiknock flexible tank for oil filled transformers according to claim 1, wherein said intermediate energy absorbing layer comprises: at least two porous structural layers; wherein the content of the first and second substances,

and a solid partition layer is arranged between any two adjacent porous structure layers and is used for partitioning the porous structure layers.

3. Antiknock flexible tank for oil filled transformers according to claim 2,

the porosity of the porous structure layer in each porous structure layer is gradually reduced from the inner wall of the middle energy absorption layer to the outer wall of the middle energy absorption layer; the inner wall of the middle energy absorption layer is arranged close to the inner isolation layer, and the outer wall of the middle energy absorption layer is arranged close to the outer support layer.

4. Antiknock flexible tank for oil filled transformers according to claim 2,

and the strength of the porous structure layer in each porous structure layer is gradually increased from the inner wall of the middle energy absorption layer to the outer wall of the middle energy absorption layer.

5. The antiknock flexible tank for oil-filled transformers according to claim 2, wherein the porous structure layer is a foam metal layer.

6. The flexible antiknock oil tank for oil-filled transformers according to claim 5 wherein the porous structure layer is a closed cell foamed aluminum layer.

7. The flexible antiknock oil tank for oil filled transformers of claim 1, wherein the intermediate energy absorbing layer is a single porous structure layer.

8. An antiknock flexible tank for oil filled transformers according to any of claims 1 to 7 in which the strength of the outer support layer is higher than the strength of the inner barrier layer.

9. The flexible antiknock oil tank for oil transformers according to any of claims 1 to 7, wherein the outer support layer and/or the inner barrier layer is a steel sheet structure layer.

10. Antiknock flexible tank for oil filled transformers according to any of claims 1 to 7,

the inner wall of the middle energy absorption layer is attached to the inner isolation layer, the outer wall of the middle energy absorption layer is attached to the outer support layer, and the middle energy absorption layer is connected with the inner isolation layer and the outer support layer respectively.

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