A transformer oil dissolved gas on-line monitoring and checking device

Abstract

The utility model discloses a kind of transformer oil dissolved gas on-line monitoring calibration equipment, it is related to transformer oil detection field, specifically a kind of transformer oil dissolved gas on-line monitoring calibration equipment, including shell, air inlet and air outlet are equipped on the shell, fan is equipped in the shell interior, filter assembly for avoiding dust accumulation on fan is equipped on the air inlet, the filter assembly includes protective shell, multiple air-guiding holes are equipped on the outer wall of protective shell, the air-guiding hole is set along the tangent direction of protective shell outer wall, the utility model solves the current most monitoring equipment's air inlet of existing only adopt single filter screen filtering, airflow directly impacts filter screen, dust is easy to accumulate and jam on filter screen, frequent cleaning can be maintained ventilation efficiency, in addition, part of small dust can penetrate single filter screen and adhere on fan blade, long-term accumulation leads to fan speed drop, noise increase, even cause motor overheating damage problem.

Description

Technical Field

[0001] This utility model relates to the field of transformer oil testing, specifically to an online monitoring and verification device for dissolved gases in transformer oil. Background Technology

[0002] As a core component of the power system, transformers often experience changes in the dissolved gas composition of their internal components due to internal faults. Therefore, online monitoring and calibration equipment needs to operate continuously for 24 hours to analyze the gas concentration in the oil in real time. The internal fan, as a core component for heat dissipation and airflow circulation, needs to continuously draw in external air to maintain stable internal temperature and humidity. If dust or impurities in the air enter the equipment, it will directly affect the monitoring accuracy and the lifespan of the components.

[0003] Most existing monitoring devices use only a single filter at the air inlet. The airflow directly impacts the filter, and dust easily accumulates and clogs it, requiring frequent cleaning to maintain ventilation efficiency. In addition, some fine dust can penetrate the single filter and adhere to the fan blades. Long-term accumulation leads to a decrease in fan speed, an increase in noise, and even overheating and damage to the motor.

[0004] Therefore, it is necessary to design a new type of online monitoring and verification device for dissolved gases in transformer oil to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an online monitoring and verification device for dissolved gases in transformer oil, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an online monitoring and verification device for dissolved gases in transformer oil, comprising a housing, an air inlet and an air outlet on the housing, a fan inside the housing, a filter assembly on the air inlet to prevent dust accumulation on the fan, the filter assembly comprising a protective shell, a plurality of air guide holes on the outer wall of the protective shell, the air guide holes being arranged along the tangential direction of the outer wall of the protective shell, and a filter element inside the protective shell.

[0007] Preferably, the protective shell includes a lower shell and an upper cover, and the lower shell and the upper cover are respectively provided with positioning rings, with the filter element located between the two positioning rings.

[0008] Preferably, the upper cover has a limiting plate on the side facing the lower housing, the limiting plate has multiple filter holes, and the limiting plate is screwed to the upper cover.

[0009] Preferably, the bottom of the limiting plate is provided with a tray.

[0010] Preferably, the outer side of the lower housing has a lower edge, and the outer side of the upper cover has an upper edge, and the upper edge and the lower edge are connected by bolts.

[0011] Preferably, an annular groove is provided on the lower edge, and a sealing ring is provided inside the annular groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by setting a limiting plate and a filter element, air passes through the filter holes of the limiting plate and the annular filter element in sequence to achieve secondary physical filtration. The dual filtration can improve the cleanliness of the air entering the equipment and prevent dust accumulation in the fan from the source. The protective shell is connected to the lower shell by bolts. When disassembling, only the bolts need to be removed to separate them, which facilitates quick replacement of the internal filter element. The limiting plate and the upper cover are connected by screws, which can be unscrewed for cleaning without disassembling the entire protective shell. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is the left view of the present invention.

[0015] Figure 3 This utility model Figure 2 A three-dimensional cross-sectional view of point AA in the middle.

[0016] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0017] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle.

[0018] In the diagram: 1. Outer shell; 2. Air inlet; 3. Air outlet; 4. Fan; 5. Air guide hole; 6. Filter element; 7. Lower shell; 8. Top cover; 9. Positioning ring; 10. Limiting plate; 11. Filter hole; 12. Tray; 13. Lower edge; 14. Upper edge; 15. Annular groove; 16. Sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] All electronic components in this application are controlled by an external controller, and all electrical appliances in this application are powered by a stable power supply that is compatible with them.

[0021] Example 1 Please refer to Figure 1-5 As shown, this utility model provides an online monitoring and verification device for dissolved gases in transformer oil, including a housing 1. The housing 1 has an air inlet 2 and an air outlet 3. A fan 4 is provided inside the housing 1. The air inlet 2 is provided with a filter assembly to prevent dust accumulation on the fan 4. The filter assembly includes a protective shell. The outer wall of the protective shell has multiple air guide holes 5. The air guide holes 5 are arranged along the tangent direction of the outer wall of the protective shell. A filter element 6 is provided inside the protective shell. The protective shell includes a lower shell 7 and an upper cover 8. The lower shell 7 and the upper cover 8 are respectively provided with positioning rings 9. The filter element 6 is located between two positioning rings 9. A limiting plate 10 is provided on the side of the upper cover 8 facing the lower shell 7. The limiting plate 10 has multiple filter holes 11. The limiting plate 10 is screwed to the upper cover 8.

[0022] The outer shell 1 is the outer side of a commonly used dissolved gas detector. The air inlet 2 and air outlet 3 are respectively opened on the outer shell 1. The fan 4 is located inside the outer shell 1. The protective shell is screwed onto the air inlet 2. The air guide hole 5 is opened on the side wall of the protective shell. There are multiple air guide holes 5. The air guide holes 5 are set along the tangent direction of the outer wall of the protective shell, which can make the air rotate into the interior of the protective shell. The filter element 6 is annular and can filter the incoming air. The protective shell is composed of a detachable upper cover 8 and a lower shell 7. Two positioning rings 9 are integrally formed on the opposite side of the upper cover 8 and the lower shell 7. The limiting plate 10 is annular and is screwed onto the upper cover 8. Multiple filter holes 11 are opened on the limiting plate 10. The filter holes 11 on the limiting plate 10 can filter the incoming air. The filter element 6 is sandwiched between the limiting plate 10 and the two positioning rings 9 to prevent the filter element 6 from loosening.

[0023] Specifically, the bottom of the limiting plate 10 is provided with a tray 12, which is integrally formed on the bottom of the limiting plate 10. The dust separated by the filter holes 11 on the limiting plate 10 will fall onto the tray 12, making it convenient to remove the dust.

[0024] The lower housing 7 has a lower edge 13 on its outer side, and the upper cover 8 has an upper edge 14 on its outer side. The upper edge 14 and the lower edge 13 are connected by bolts. The lower edge 13 is integrally formed on the lower housing 7, and the upper edge 14 is integrally formed on the upper cover 8. The upper cover 8 and the lower housing 7 can be disassembled and assembled by bolts, which facilitates the replacement of the internal filter element 6 and the cleaning of dust.

[0025] Based on the above embodiments, specifically, an annular groove 15 is provided on the lower edge 13, and a sealing ring 16 is provided inside the annular groove 15. The annular groove 15 is opened on the lower edge 13, and the sealing ring 16 is placed in the annular groove 15 to seal the gap between the upper cover 8 and the lower housing 7.

[0026] Working principle: During use, the fan 4 draws external air into the protective shell. The air guide hole 5 causes the airflow to swirl into the protective shell. The airflow then passes through multiple filter holes 11 on the limiting plate 10 and enters the filter element 6 for secondary filtration. After secondary filtration, the airflow enters the outer shell 1. Dust in the air remains on the tray 12, the limiting plate 10, and the filter element 6. The air filtered twice prevents dust accumulation on the fan 4. When it is necessary to clean the inside of the protective shell, remove the bolts on the upper edge 14 and the lower edge 13, then remove the upper cover 8. At this time, the tray 12 will be brought out. Then remove the filter element 6 and clean it. When it is necessary to clean the limiting plate 10, unscrew the limiting plate 10 from the upper cover 8, clean it, and then reinstall it.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online monitoring and verification device for dissolved gases in transformer oil, characterized in that, Includes an outer shell (1), on which an air inlet (2) and an air outlet (3) are provided. Inside the outer shell (1) is a fan (4). On the air inlet (2) is a filter assembly for preventing dust accumulation on the fan (4). The filter assembly includes a protective shell. On the outer wall of the protective shell are multiple air guide holes (5). The air guide holes (5) are arranged along the tangential direction of the outer wall of the protective shell. Inside the protective shell is a filter element (6).

2. The online monitoring and verification device for dissolved gases in transformer oil according to claim 1, characterized in that: The protective shell includes a lower shell (7) and an upper cover (8). The lower shell (7) and the upper cover (8) are respectively provided with positioning rings (9), and the filter element (6) is located between the two positioning rings (9).

3. The online monitoring and verification device for dissolved gases in transformer oil according to claim 2, characterized in that: The upper cover (8) has a limiting plate (10) on the side facing the lower housing (7). The limiting plate (10) has multiple filter holes (11) and is screwed to the upper cover (8).

4. The online monitoring and verification device for dissolved gases in transformer oil according to claim 3, characterized in that: The bottom of the limiting plate (10) is provided with a tray (12).

5. The online monitoring and verification device for dissolved gases in transformer oil according to claim 4, characterized in that: The lower housing (7) has a lower edge (13) on its outer side, and the upper cover (8) has an upper edge (14) on its outer side. The upper edge (14) and the lower edge (13) are connected by bolts.

6. The online monitoring and verification device for dissolved gases in transformer oil according to claim 5, characterized in that: The lower edge (13) is provided with an annular groove (15), and a sealing ring (16) is provided inside the annular groove (15).

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