Oil mist filtering device for transformer oil

Abstract

The utility model relates to the technical field of power equipment, in particular to an oil mist filtering device for transformer oil, which comprises a filter upper shell and a filter lower shell which can be spliced and combined, and accommodating cavities which can be communicated with each other are respectively formed in the filter upper shell and the filter lower shell; the filter lower shell is provided with an air inlet, the air inlet is communicated with a containing cavity in the filter lower shell, the filter upper shell is provided with an air outlet, and the air outlet is communicated with a containing cavity in the filter upper shell; and a filter screen is arranged in the accommodating cavity. The technical problem that in the prior art, oil mist generated in the degassing process cannot be effectively separated from the to-be-detected gas is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to an oil mist filtering device for transformer oil. Background Art

[0002] During the operation of the transformer, the gas in the transformer oil needs to be monitored online, so the gas in the transformer oil needs to be degassed. The existing degassing devices include osmotic membrane method, stirring method, ultrasonic method, headspace method and vacuum method. Among them, the vacuum degassing device has the advantages of fast and high efficiency, and has become the most commonly used device.

[0003] However, when the transformer oil is degassed through the vacuum degassing device, a large amount of oil mist will be generated due to the stirring and heating. The oil mist will enter other electrical components through the gas path, thereby corroding other electrical components and affecting gas detection. Utility Model Content

[0004] The present application provides an oil mist filtering device for transformer oil, so as to at least solve the technical problem in the prior art that the oil mist generated during the degassing process cannot be effectively separated from the gas to be detected.

[0005] In order to achieve the above-mentioned purpose, the present application provides an oil mist filtering device for transformer oil, comprising a filter upper shell and a filter lower shell that can be spliced ​​and combined, and the upper shell and the lower shell of the filter respectively form a receiving cavity that can be communicated with each other; the lower shell of the filter is provided with an air inlet, and the air inlet is communicated with the receiving cavity inside the lower shell of the filter, and the upper shell of the filter is provided with an air outlet, and the air outlet is communicated with the receiving cavity inside the upper shell of the filter; a filter net is provided inside the receiving cavity.

[0006] In some embodiments, the top of the accommodating cavity inside the filter upper shell is designed to be conical, and the bottom of the accommodating cavity inside the filter lower shell is designed to be conical.

[0007] In some embodiments, the air outlet is communicated with the conical tip of the accommodating cavity inside the filter upper shell, and the air inlet is communicated with the conical tip of the accommodating cavity inside the filter lower shell.

[0008] In some embodiments, the filter screen is arranged at the connection point between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity.

[0009] In some embodiments, the filter is a polymer filter.

[0010] In some embodiments, the filter screen is made of stainless steel.

[0011] In some embodiments, a first sealing ring is provided at the connection between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity, and the filter lower shell and / or the filter upper shell are provided with a first accommodating portion for accommodating the first sealing ring.

[0012] In some embodiments, a second sealing ring that is concentric with the first sealing ring and has a larger diameter than the first sealing ring is provided at the connection between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity, and the filter lower shell and / or the filter upper shell is provided with a second accommodating portion for accommodating the second sealing ring.

[0013] In some embodiments, the first sealing ring is located at the lower part of the filter screen, and the diameter of the first sealing ring is smaller than that of the filter screen.

[0014] In some embodiments, the inner diameter of the filter upper shell accommodating cavity is greater than the inner diameter of the filter lower shell accommodating cavity.

[0015] According to the above content, the beneficial effects of this application are:

[0016] 1. A polymer filter is installed inside the filter device to filter the oil mist in the gas to be detected, so that the oil mist will not affect the life of other electronic components;

[0017] 2. The top of the accommodating cavity inside the filter upper shell is designed to be conical, which can facilitate the collection of filtered gas;

[0018] 3. The bottom of the accommodating cavity inside the lower shell of the filter is designed to be conical, which can easily gather the filtered oil mist and make it liquefied and flow back to the degassing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0021] Figure 2 It is an exploded view of an embodiment of the present application;

[0022] Figure 3 It is a cross-sectional view of an embodiment of the present application.

[0023] Explanation of reference numerals: filter upper shell 1; air outlet 1.1; filter lower shell 2; air inlet 2.1; filter screen 3; first sealing ring 4; second sealing ring 5; first accommodating portion 6; second accommodating portion 7. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed in the present application, some changes such as design, manufacturing or production based on the technical contents disclosed in the present application are only conventional technical means, and should not be understood as insufficient contents disclosed in the present application.

[0025] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0026] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to greater than or equal to two. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0027] Implementation example Figures 1 to 3As shown, an oil mist filtering device for transformer oil includes an upper filter shell 1 and a lower filter shell 2 that can be spliced ​​and combined, and the upper filter shell 1 and the lower filter shell 2 are respectively formed with mutually connected accommodating chambers. The lower filter shell 2 is provided with an air inlet 2.1, and the air inlet 2.1 is connected to the accommodating chamber inside the lower filter shell 2. The upper filter shell 1 is provided with an air outlet 1.1, and the air outlet 1.1 is connected to the accommodating chamber inside the upper filter shell 1. A polymer filter screen 3 is provided inside the accommodating chamber, and the gas to be detected enters the accommodating chamber from the air inlet 2.1 and flows through the filter screen 3. The filter screen 3 has a micron-level filtering accuracy, and can filter the oil mist in the gas to be detected, so that the gas passes through the filter screen 3 and enters the accommodating chamber of the upper filter shell 1, and flows out through the air outlet 1.1 connected thereto.

[0028] Furthermore, the top of the accommodation cavity inside the filter upper shell 1 is designed to be conical, and the air outlet 1.1 is connected to the conical tip of the accommodation cavity inside the filter upper shell 1. Such a design can facilitate the filtered gas to gather and be discharged through the air outlet 1.1. The bottom of the accommodation cavity inside the filter lower shell 2 is designed to be conical, and the air inlet 2.1 is connected to the conical tip of the accommodation cavity inside the filter lower shell 2. Such a design can facilitate the gathering of liquefied oil mist after filtration at the bottom of the accommodation cavity, so that it flows back to the degassing device, preventing the liquefied oil mist from gathering and blocking the gas port, especially preventing the bottom air inlet 2.1 from blocking.

[0029] Further, the inner diameter of the filter upper shell 1 accommodating cavity is larger than the inner diameter of the filter lower shell 2 accommodating cavity, and the filter screen 3 is arranged at the connection point between the filter upper shell 1 accommodating cavity and the filter lower shell 2 accommodating cavity. The connection point between the filter upper shell 1 accommodating cavity and the filter lower shell 2 accommodating cavity is also provided with a first sealing ring 4 and a second sealing ring 5 for ensuring the sealing between the filter screen 3 and the accommodating cavity, and the filter lower shell 2 and / or the filter upper shell 1 are provided with a first accommodating portion 6 for accommodating the first sealing ring 4 and a second accommodating portion 7 for accommodating the second sealing ring 5. In this embodiment, the first accommodating portion 6 and the second accommodating portion 7 are located in the filter lower shell 2.

[0030] Specifically, the filter 3, the first sealing ring 4 and the second sealing ring 5 are arranged concentrically, and the diameter of the second sealing ring 5 is larger than that of the filter 3, and the diameter of the filter 3 is larger than that of the first sealing ring 4. The first sealing ring 4 is located at the lower part of the filter 3, that is, between the filter 3 and the filter lower shell 2, to ensure the sealing between the filter 3 and the filter lower shell 2. The second sealing ring 5 is located between the filter upper shell 1 and the filter lower shell 2, to ensure the sealing between the filter upper shell 1 and the filter lower shell 2.

[0031] Specifically, the filter screen 3 is made of stainless steel.

[0032] Working principle: The gas to be detected released from the transformer oil enters the containing chamber of the oil mist filter device through the air inlet 2.1, is filtered through the polymer filter 3, and the oil mist in the gas to be detected is filtered out. The gas to be detected enters the next link through the air outlet 1.1, and the filtered oil mist gathers in the containing chamber of the filter lower shell 2. After the oil mist is liquefied, it gathers at the cone at the bottom of the containing chamber and flows back to the degassing device.

[0033] Those skilled in the art should understand that the technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A transformer oil mist filter device, comprising an upper filter shell and a lower filter shell that can be spliced ​​and combined, characterized in that: The filter upper shell and the filter lower shell respectively form mutually communicated accommodating cavities; the filter lower shell is provided with an air inlet, which is communicated with the accommodating cavity inside the filter lower shell; the filter upper shell is provided with an air outlet, which is communicated with the accommodating cavity inside the filter upper shell; a filter net is provided inside the accommodating cavity.

2. The oil mist filtering device for transformer oil according to claim 1, characterized in that: The top of the accommodating cavity inside the filter upper shell is designed to be conical, and the bottom of the accommodating cavity inside the filter lower shell is designed to be conical.

3. The oil mist filtering device for transformer oil according to claim 2, characterized in that: The air outlet is communicated with the conical tip of the accommodating cavity inside the filter upper shell, and the air inlet is communicated with the conical tip of the accommodating cavity inside the filter lower shell.

4. The oil mist filtering device for transformer oil according to claim 3, characterized in that: The filter screen is arranged at the connection point between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity.

5. The oil mist filtering device for transformer oil according to claim 4, characterized in that: The filter screen is a polymer filter screen.

6. The oil mist filtering device for transformer oil according to claim 4, characterized in that: The filter screen is made of stainless steel.

7. The oil mist filtering device for transformer oil according to claim 4, characterized in that: A first sealing ring is provided at the connection point between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity, and the filter lower shell and / or the filter upper shell is provided with a first accommodating portion for accommodating the first sealing ring.

8. The oil mist filtering device for transformer oil according to claim 7, characterized in that: A second sealing ring concentric with the first sealing ring and having a larger diameter than the first sealing ring is provided at the connection between the filter upper shell accommodating cavity and the filter lower shell accommodating cavity, and the filter lower shell and / or the filter upper shell is provided with a second accommodating portion for accommodating the second sealing ring.

9. The oil mist filtering device for transformer oil according to claim 7, characterized in that: The first sealing ring is located at the lower part of the filter screen, and the diameter of the first sealing ring is smaller than that of the filter screen.

10. The oil mist filtering device for transformer oil according to any one of claims 1 to 9, characterized in that: The inner diameter of the filter upper shell accommodating cavity is greater than the inner diameter of the filter lower shell accommodating cavity.

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