Filtering device and transformer

Abstract

The utility model provides a filter device and transformer, the device includes: respirator, connecting device and bearing device, respirator includes first cover body, second cover body and first barrel, first cover body and second cover body are located the both ends of first barrel, make first cover body, second cover body and first barrel form first accommodation chamber, and the bearing device is connected to the first cover body and second cover body. The first accommodating cavity is used for accommodating a filtering material, the first cover body is provided with a first opening, and the second cover body is provided with a second opening; the connecting device comprises a third opening and a fourth opening, the third opening is communicated with the first opening, the fourth opening is used for being communicated with an oil injection hole connected with the transformer body, and the connecting device is of a hollow structure; the bearing device comprises a second barrel and a third cover, the second barrel is provided with a fifth opening, the fifth opening is communicated with the second opening, the second barrel and the third cover form a second containing cavity, and the second containing cavity is used for containing liquid reserved from the oil injection hole. The pressure inside and outside the oil tank can be effectively adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field especially relates to a filter device and transformer. BACKGROUND

[0002] The transformer, also known as a pre-installed transformer substation or a combined transformer substation, is a compact power device that combines high-voltage switchgear, distribution transformers, low-voltage distribution equipment, and the like in one or more enclosures. Because the transformer generates heat during operation, and high-voltage electricity can cause a breakdown, it is important to dissipate heat from the transformer while reducing the probability of a breakdown.

[0003] However, to prevent air, moisture, and contaminants from entering and affecting the electrical insulation and thermal conductivity of the transformer oil, the oil tank is typically sealed. During heat conduction, the air in the oil tank can change in volume due to thermal expansion and contraction.

[0004] Therefore, how to address the uneven internal and external pressure of the transformer oil tank is a technical problem that needs to be addressed by those skilled in the art. SUMMARY

[0005] The utility model provides a filter device and transformer, it is simple in structure, can effectively adjust the pressure inside and outside the oil tank.

[0006] In a first aspect, the utility model provides a filter device, comprising:

[0007] The respirator includes a first cover, a second cover, and a first cylinder. The first cover and the second cover are located at both ends of the first cylinder to form a first containing cavity with the first cover, the second cover, and the first cylinder. The first containing cavity is used to contain filter material. The first cover is provided with a first opening, and the second cover is provided with a second opening.

[0008] The connecting device includes a third opening and a fourth opening. The third opening is in communication with the first opening, and the fourth opening is used to communicate with an oil injection hole of a transformer body. The connecting device is a hollow structure.

[0009] The bearing device includes a second cylinder and a third cover. The second cylinder is provided with a fifth opening, and the fifth opening is in communication with the second opening. The second cylinder and the third cover form a second containing cavity, which is used to contain liquid discharged from the oil injection hole.

[0010] The utility model is suitable for the transformer with oil tank, the filter device is connected with the transformer through the connecting device on the oil tank, on the one hand, the filter device can be closer to the oil tank, and the pressure inside and outside the oil tank can be balanced faster, on the other hand, the connecting device is short, and the situation that the outside gas enters the oil tank without filtering due to the insufficient sealing property of the connecting device can be avoided as far as possible, and the transformer oil is guaranteed not to be polluted by impurities, and the utility model embodiment further includes connecting device and bearing device, the connecting device is directly communicated with the oil injection hole of the transformer body through the fourth opening, can reduce the consumables in the connecting process to a certain extent, can reduce the maintenance time cost when the connecting device fails, the bearing device uses the second accommodating cavity to accommodate the liquid left by the oil injection hole, avoids the pollution of the overflowing transformer oil to the outer layer of the filter device, and can improve the service life of the filter device.

[0011] The filter device, optionally, the connecting device includes a first end and a second end;

[0012] The third opening is arranged at the first end of the connecting device, and the fourth opening is arranged at the second end of the connecting device;

[0013] The first end of the connecting device is fixedly connected with the first cover body, so that the third opening is in communication with the first opening;

[0014] The second end of the connecting device is used for being connected with the transformer body, so that the fourth opening is in communication with the oil injection hole of the transformer body.

[0015] The filter device, optionally, the first end of the connecting device is provided with a first flange, and the first cover body is provided with a second flange;

[0016] The first end of the connecting device is fixedly connected with the first cover body through the first flange and the second flange.

[0017] The filter device, optionally, the second end of the connecting device is provided with a third flange, and the transformer body is provided with a fourth flange;

[0018] The second end of the connecting device is fixedly connected with the transformer body through the third flange and the fourth flange.

[0019] The flange is usually connected through a bolt and a nut, and the bolt holes on the flange face are pre-processed and arranged according to the standardized size and spacing, which makes the connection of the pipeline or the equipment more accurate and stable. In the embodiment, on the one hand, the connection between the connecting device and the oil injection hole and the breather can be more stable; on the other hand, when the connecting device and / or the breather fails, it is convenient to disassemble and replace.

[0020] The filtering device as above optionally further comprises a sealing ring.

[0021] The sealing ring is arranged between the third flange and the fourth flange to prevent oil leakage.

[0022] The filtering device as above optionally, the first flange and the second flange are square pressure-cast aluminum flanges, and the third flange and the fourth flange are circular flanges.

[0023] When the diameter of the circle is the same as the side length of the square, the area of the square is greater than that of the circle, so the contact area between the square flanges is greater than that between the circular flanges, and the fixing effect of the square flanges is better than that of the circular flanges. Meanwhile, the breathing device is fixed on the oil tank by the third flange, the sealing gasket and the fourth flange. The self-weight of the breathing device is greater than the self-weight of the bearing device and the breather, so on the basis of considering the flange material, the first flange and the second flange for fixing the breathing device are square pressure-cast aluminum flanges, and the third flange and the fourth flange are circular flanges.

[0024] In this embodiment, the first flange and the second flange are square pressure-cast aluminum flanges, and the third flange and the fourth flange are circular flanges, which saves the flange material and ensures the installation stability of the breathing device.

[0025] The filtering device as above optionally, the connecting device is an L-shaped pipe.

[0026] The filtering device as above optionally, the first cylinder and the second cylinder are both transparent structures.

[0027] The filtering device as above optionally, the filtering material is silica gel.

[0028] In a second aspect, the utility model provides a kind of transformer, comprising:

[0029] The transformer body and the filtering device of any one of the first aspect are fixedly connected with the oil injection hole.

[0030] The transformer body comprises an oil injection hole, and the filtering device is fixedly connected with the oil injection hole.

[0031] The structure of the filtering device and the transformer provided by the utility model and other utility model purposes and beneficial effects thereof will be more obvious and easy to understand through the description of preferred embodiments combined with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 is a cross-sectional structure schematic diagram of a transformer provided by the embodiments of the present application;

[0034] Figure 2 is another structure schematic diagram of a box-type transformer provided by the embodiments of the present application;

[0035] Figure 3 is a structure schematic diagram of a filtering device provided by the embodiments of the present application;

[0036] Figure 4 is a structure schematic diagram of a connecting device provided by the embodiments of the present application.

[0037] Explanation of reference signs:

[0038] 1: oil injection hole; 2: oil tank; 3: oil tank cavity; 4: voltage transformation assembly; 5: transformer shell; 6: partition plate; 7: connecting device; 8: breather; 9: bearing device;

[0039] 71: fourth opening; 711: third flange; 713: sealing gasket; 72: third opening; 721: first flange; 723: sealing ring;

[0040] 81: first cover body; 811: second flange; 82: first cylinder body; 83: second cover body;

[0041] 91: third cover body; 92: second cylinder body; 11: fourth flange. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0043] The transformer can be YB12-10 / 0.4-50, S13-1600KVA, box-type transformer and other forced water-cooled type transformers.

[0044] Taking a box-type transformer as an example, the transformer in the embodiment of the present utility model will be further elaborated below.

[0045] Figure 1 It is a schematic cross-sectional structure diagram of a box-type transformer provided by an embodiment of the present utility model. As Figure 1 shown, the box-type transformer includes an oil injection hole 1, an oil tank 2, an oil tank cavity 3, a voltage transformation component 4, and a transformer housing 5. The cross-section of the transformer housing 5 is in a "day" character structure, with the upper half and the lower half each forming a cavity, separated by a partition 6. The cavity above the partition 6 is the upper cavity of the transformer, and the cavity below is the lower cavity of the transformer. The voltage transformation component 4 sequentially penetrates the lower cavity and the upper cavity of the transformer from bottom to top; an oil tank 2 is arranged in the lower cavity of the transformer. The oil tank 2 is in contact with the inner edge of the lower cavity of the transformer, and an oil tank cavity 3 is surrounded by the sealed structure of the oil tank 2. Transformer oil is carried in the oil tank cavity 3 for heat dissipation and reducing the breakdown probability; a part of the voltage transformation component 4 in the lower cavity of the transformer is immersed in the transformer oil.

[0046] In the prior art, by immersing voltage transformation components such as windings in transformer oil to make the voltage transformation components fully contact with the transformer oil. On the one hand, it can ensure the contact area between the voltage transformation components and the transformer oil as much as possible, enabling better heat dissipation of the voltage transformation components. On the other hand, it can avoid the contact between the voltage transformation components and air as much as possible, effectively reducing the probability of electrical breakdown.

[0047] During the operation of the voltage transformation component, due to phenomena such as copper loss, iron loss, and load loss, a large amount of heat will be generated. As a heat dissipation medium, the transformer oil will absorb the heat generated by the voltage transformation component. Further, the air in the oil tank in contact with the transformer oil will absorb the heat of the transformer oil; due to the principle of thermal expansion and contraction, the volume of the transformer oil and the air in contact with it will increase.

[0048] However, since the oil tank is a sealed cavity, the pressure inside the oil tank increases, thus resulting in the problem of uneven pressure inside and outside the oil tank.

[0049] To solve the above problems, in this embodiment, Figure 2 It is a schematic structure diagram of another box-type transformer provided by an embodiment of the present utility model. As Figure 2 shown, the connecting device 7 includes a first end and a second end. The first end is the lower end, and the second end is the upper end; the outside of the oil injection hole 1 is connected and fixed to the second end of the connecting device 7 to connect the transformer body; the breather 8 includes a first opening and a second opening. The first opening is the upper end, and the second opening is the lower end. The first end of the connecting device 7 is connected and fixed to the first opening of the breather 8; the carrying device 9 includes a fifth opening and a sixth opening. The fifth opening is the upper end, and the sixth opening is the lower end. The fifth opening is connected and fixed to the second opening of the breather 8.

[0050] Specifically, asFigure 3 As shown in the figure, the respirator 8 comprises a first cover 81, a second cover 83 and a first cylinder 82, the first cover 81 and the second cover 83 are located at two ends of the first cylinder 82, so that the first cover 81, the second cover 83 and the first cylinder 82 form a first containing cavity, the first containing cavity is used for containing filter material, the first cover 81 is provided with a first opening, and the second cover 83 is provided with a second opening.

[0051] The connecting device 7 comprises a third opening 72 and a fourth opening 71, the third opening 72 is in communication with the first opening, and the fourth opening 71 is used for being in communication with the oil injection hole 1 of the box-type transformer body, and the connecting device 7 is a hollow structure.

[0052] The bearing device 9 comprises a second cylinder 92 and a third cover 91, the second cylinder 92 is provided with a fifth opening, the fifth opening is in communication with the second opening, and the second cylinder 92 and the third cover 91 form a second containing cavity, and the second containing cavity is used for containing liquid left out of the oil injection hole 1.

[0053] In the embodiment, the filter device is connected with the transformer through the connecting device on the oil tank 2, on the one hand, the filter device can be closer to the oil tank 2, and the pressure inside and outside the oil tank 2 can be balanced faster; on the other hand, the connecting device is short, and the situation that external gas enters the oil tank 2 without being filtered due to insufficient sealing of the connecting device can be avoided as much as possible, and the transformer oil is protected from being polluted by impurities. Moreover, the utility model embodiment further comprises the connecting device 7 and the bearing device 9, the connecting device 7 is in direct communication with the oil injection hole 1 of the transformer body through the fourth opening 71, the consumption of materials in the connecting process can be reduced to a certain extent, the maintenance time cost can be reduced when the connecting device 7 fails, the bearing device uses the second containing cavity to contain liquid left out of the oil injection hole 1, the transformer oil overflowed can be prevented from polluting the outer layer of the filter device, and the service life of the filter device can be improved.

[0054] Specifically, as shown in the figure, Figure 4 In the embodiment, the connecting device 7 comprises a first end and a second end; the third opening 72 is arranged at the first end of the connecting device 7, and the fourth opening 71 is arranged at the second end of the connecting device 7; the first end of the connecting device 7 is fixedly connected with the first cover 81, so that the third opening 72 is in communication with the first opening; and the second end of the connecting device 7 is used for being connected with the box-type transformer body, so that the fourth opening 71 is in communication with the oil injection hole 1 of the box-type transformer body.

[0055] Further, as shown in the figures, Figure 3 and Figure 4 The first end of the connecting device 7 is provided with a first flange 721, the first cover 81 is provided with a second flange 811, and the first end of the connecting device 7 is fixedly connected with the first cover 81 through the first flange 721 and the second flange 811.

[0056] It can be understood that the flanges are usually connected by bolts and nuts, and the bolt holes on the flange faces are pre-processed and arranged according to standardized sizes and intervals, which makes the connection of the pipeline or equipment more accurate and stable.

[0057] The flange structure can make the connection between the connecting device and the oil injection hole and the breather more stable, and facilitate disassembly and replacement when the connecting device and / or the breather fail.

[0058] Further, the second end of the connecting device 7 is provided with a third flange 711, and the box-type transformer body is provided with a fourth flange 11; the second end of the connecting device 7 is fixedly connected with the box-type transformer body through the third flange 711 and the fourth flange 11. The filtering device further comprises a sealing ring 723; the sealing ring 723 is arranged between the third flange 711 and the fourth flange 11, and is used for preventing oil leakage.

[0059] Further, when the diameter of the circle is the same as the side length of the square, the area of the square is greater than that of the circle, so the contact area between the square flanges is greater than that between the circular flanges, and the fixing effect of the square flanges is better than that of the circular flanges. The breathing device is fixed on the oil tank by the third flange 711, the sealing gasket 713 and the fourth flange 11. The self-weight of the breathing device is greater than the sum of the self-weight of the bearing device and the breather, so on the basis of considering the flange material, the first flange 721 and the second flange 811 for fixing the breathing device are square die-cast aluminum flanges, and the third flange 711 and the fourth flange 11 are circular flanges.

[0060] By setting the first flange 721 and the second flange 811 as square die-cast aluminum flanges and the third flange 711 and the fourth flange 11 as circular flanges, the flange material is saved, and the installation stability of the breathing device is ensured. In addition, if the third flange 711 and the fourth flange 11 are square flanges, the self-weight of the breathing device will increase, thereby reducing the installation stability of the breathing device.

[0061] Further, the connecting device 7 in the embodiment is an L-shaped pipe, and the cross section of the L-shaped pipe is circular.

[0062] Further, the filtering material is silica gel, which is used to absorb dust, moisture and other impurities in the gas entering the oil tank.

[0063] Further, the first cylinder 82 and the second cylinder 92 are both transparent structures, which facilitate observation of the working process of the breather. Since silica gel adsorption has saturation, in order to facilitate observation of whether the silica gel is saturated, preferably, the silica gel is selected to be color-changing silica gel.

[0064] The utility model is suitable for the transformer with oil tank, the filter equipment is connected with the transformer through the connecting device on the oil tank, on the one hand, the filter equipment can be closer to the oil tank, and the pressure inside and outside the oil tank can be balanced faster, on the other hand, the short connecting device can avoid the situation that the outside gas enters the oil tank without filtering due to the insufficient sealing of the connecting device as far as possible, and the transformer oil is protected from impurity pollution.

[0065] The poor sealing of the tank transformer breather will cause the unstable pressure in the transformer, thereby affecting the working stability of the transformer.

[0066] Further, the filter device can be two. The two filter devices are in parallel structure, one of which is the main filter, and the other is the standby filter device. An exhaust port with a switch valve is arranged at both ends of the filter device, and a gas analyzer is arranged between the filter device and the tank transformer. The switch state of the switch valve is consistent with the switch state of the gas analyzer, the connection pipeline between the filter device, the tank transformer and the gas analyzer is T-shaped or Y-shaped, the switch valve and the gas analyzer are on the same branch, and the gas analyzer can analyze various gases in the internal gas and the corresponding gas content of each gas.

[0067] The embodiment sets up the standby filter device to ensure the working stability of the tank transformer.

[0068] The flange in the embodiment can be a threaded flange, a welded flange or a clamping flange, which can ensure the sealing between the paired flanges, and the embodiment will not be described again.

[0069] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0070] In the description of the present application, it should be understood that the terms "comprising" and "having" and any variations thereof used herein are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0071] Unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or become an integral part; it can be directly connected, or indirectly connected through an intermediate medium, it can be connected inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filter device, characterized in that The application relates to a filter device for a transformer. The filter device comprises a respirator, a connecting device and a bearing device. The respirator comprises a first cover, a second cover and a first cylinder, the first cover and the second cover are located at two ends of the first cylinder, so that the first cover, the second cover and the first cylinder form a first containing cavity for containing filter material, the first cover is provided with a first opening, and the second cover is provided with a second opening. The connecting device comprises a third opening and a fourth opening, the third opening is communicated with the first opening, and the fourth opening is used for being communicated with an oil injection hole of a transformer body, and the connecting device is a hollow structure.

2. The filter device of claim 1, wherein, The bearing device comprises a second cylinder and a third cover, the second cylinder is provided with a fifth opening, the fifth opening is communicated with the second opening, the second cylinder and the third cover form a second containing cavity for containing liquid discharged from the oil injection hole. The connecting device comprises a first end and a second end. The third opening is arranged at the first end of the connecting device, and the fourth opening is arranged at the second end of the connecting device. The first end of the connecting device is fixedly connected with the first cover, so that the third opening is communicated with the first opening.

3. The filter device of claim 2, wherein, The second end of the connecting device is used for being connected with the transformer body, so that the fourth opening is communicated with the oil injection hole of the transformer body. The first end of the connecting device is provided with a first flange, and the first cover is provided with a second flange.

4. The filter device of claim 3, wherein, The first end of the connecting device is fixedly connected with the first cover through the first flange and the second flange. The second end of the connecting device is provided with a third flange, and the transformer body is provided with a fourth flange.

5. The filter device of claim 4, wherein, The second end of the connecting device is fixedly connected with the transformer body through the third flange and the fourth flange. The filter device further comprises a sealing ring.

6. The filter device of claim 5, wherein, The sealing ring is arranged between the third flange and the fourth flange and is used for preventing oil leakage.

7. The filter device according to any one of claims 1 to 6, characterized in that The first flange and the second flange are square die-casting aluminum flanges, and the third flange and the fourth flange are circular flanges.

8. The filter device according to any one of claims 1 to 6, characterized in that The connecting device is an L-shaped pipe.

9. The filter device according to any one of claims 1 to 6, characterized in that The first cylinder and the second cylinder are transparent structures. The filter material is silica gel.

10. A transformer comprising a transformer body and the filter device according to any one of claims 1 to 9. The transformer body comprises an oil injection hole, and the filter device is fixedly connected with the oil injection hole.

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