Transformer oil copper removal filter device and filtering method

Abstract

The invention belongs to the technical field of transformer oil filtration, and discloses a transformer oil copper removal filtering device and a filtering method thereof, specifically a transformer oil copper removal filtering device, comprising a connecting component, wherein an oil inlet pipe and an oil filter pipe are respectively connected to the connecting component, wherein the oil inlet pipe and the oil filter pipe are both connected to a transformer, wherein the connecting component comprises a restraining shell, wherein one end of the restraining shell is connected to an observation shell, wherein the observation shell is connected to the oil inlet pipe, and the transformer oil is introduced into the observation chamber through the cooperation between the arranged storage component and the observation chamber, and the oil quality of the transformer oil is identified and detected by using the observation chamber. When the filtered transformer oil still does not meet the use requirements, the metal passivator in the storage component is mixed with the transformer oil, so that the metal passivator protects the inner wall of the transformer, reduces the precipitation of copper ions, and thus ensures the service life of the transformer oil.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer oil filtering, in particular to a transformer oil copper removal filtering device and a filtering method thereof. Background Art

[0002] The excessive copper ion content in transformer oil will affect the oil dielectric loss and transformer insulation resistance. The use of oil filter adsorbent treatment can greatly reduce the copper ion content, but it is difficult to treat it thoroughly and may rebound after operation. Therefore, it is necessary to adopt a more effective method to completely solve the problem of increased copper ion content in the running transformer oil. During the operation of the transformer oil, it is inevitable to contact with metal utensils, so the oil often contains trace amounts of copper, iron and other elements. Copper and its ions have a strong catalytic effect on the oxidation of oil products. In addition, copper and its ions have a very significant effect on the tamδ value of transformer oil. Therefore, people attribute the sharp increase in the tamδ value of insulating oil when there are metals such as copper and iron to the increase in ions in the oil.

[0003] The patent with application number CN201721774637.1 discloses a transformer oil copper removal and filtering device, which includes a circulation pump, an adsorption tank, a first oil filter, an oil tank and a second oil filter connected in sequence through a connecting pipe, the circulation pump is connected to the bottom of the transformer oil tank, the second oil filter is connected to the top of the transformer oil tank, the adsorption tank is a tank structure with oil inlet at the bottom and oil outlet at the top, and an adsorbent is arranged in the adsorption tank. The above scheme uses the adsorption tank, the first oil filter and the second oil filter to adsorb and filter the transformer oil. The adsorbent used in the adsorption tank has a good adsorption effect on copper and its ions, effectively reducing the copper content in the transformer oil and ensuring the safe and stable operation of the main transformer of the substation.

[0004] However, in the process of filtering transformer oil, the filtering status of the filtering component cannot be effectively identified, which ultimately leads to slow filtering efficiency of the transformer oil or filtering failure. In addition, when it is impossible to determine whether the transformer oil is fully filtered, the transformer will be worn out faster and its service life will be reduced.

[0005] Therefore, in order to solve the above technical problems, a transformer oil copper removal filtering device and a filtering method thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems. The present invention provides a transformer oil copper removal filter device and a filtering method thereof, which have the advantages of sufficient filtering and ensuring stable operation of the transformer oil.

[0007] To achieve the above object, the present invention provides the following technical solution: a transformer oil copper removal and filtering device, comprising a connecting assembly, the connecting assembly is respectively connected with an oil inlet pipe and an oil filter pipe, the oil inlet pipe and the oil filter pipe are both connected to the transformer;

[0008] The connecting assembly comprises a restraining shell, one end of which is connected to an observation shell, the observation shell is connected to the oil inlet pipe, and one end of the restraining shell away from the observation shell is connected to an oil outlet area, a connecting plate is connected between the observation shell and the restraining shell, and a storage assembly is connected between the restraining shell and the oil outlet area;

[0009] The storage component comprises an annular shell, a storage cavity is provided in the annular shell, and a metal passivator is stored in the storage cavity.

[0010] Preferably, an observation cavity is provided in the observation shell, and a filter hole is provided on the connecting plate, and the opening and closing of the filter hole can be controlled.

[0011] Preferably, an oil passage chamber is provided through the restraint shell, a filter assembly is connected to the oil passage chamber, and two through holes are provided on the chamber wall of the oil passage chamber, both of the through holes are located on the side of the filter assembly close to the observation chamber, and two detection assemblies are connected to the restraint shell, and both of the detection assemblies are connected to the through holes.

[0012] Preferably, an oil outlet cavity is provided in the oil outlet area, and the oil outlet cavity is communicated with the oil filter pipe.

[0013] Preferably, the detection component includes a transparent tube, a detection part is connected inside the transparent tube, the detection part is communicated with the constraint shell, the detection part includes a fixed shell, a movable rod is slidably provided on the fixed shell, a baffle is connected to the end of the movable rod away from the fixed shell, a telescopic spring is connected between the fixed shell and the baffle, and the baffle can seal the through hole.

[0014] Preferably, the filter assembly comprises a first filter plate, an end of the first filter plate away from the observation chamber is connected to a second filter plate, and an end of the second filter plate away from the first filter plate is connected to an identification assembly for detecting filtered oil.

[0015] Preferably, the identification component comprises a connecting shaft, one end of the connecting shaft is connected to the second filter plate, and one end of the connecting shaft away from the second filter plate is connected to a disc, on which an identification leaf is rotatably provided.

[0016] Preferably, the storage assembly further comprises a supply pipe, the supply pipe is in communication with the storage cavity, one end of the supply pipe away from the storage cavity passes through the connection assembly and is in communication with the outside, and a communication hole is formed through the cavity wall of the storage cavity.

[0017] Preferably, an oil return pipe is connected to the observation shell, the oil return pipe is in communication with the observation chamber, and one end of the oil return pipe away from the observation chamber is in communication with the transformer.

[0018] A filtering method comprises the following steps:

[0019] S1. Let the transformer oil enter the observation chamber through the oil inlet pipe, and use the observation chamber to identify the quality of the transformer oil;

[0020] S2, the transformer oil enters the oil passage chamber through the connecting plate, is filtered by the filter assembly in the oil passage chamber, and then enters the transformer through the filter oil pipe;

[0021] S3, using the detection component to identify the filtering state of the filtering component, and judging the filtering state of the filtering component according to the moving position of the baffle in the transparent tube;

[0022] S4. When there is no obvious improvement in the transformer oil in the observation chamber, the metal passivator in the storage assembly mixes with the transformer oil when the transformer oil passes through the storage assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Through the cooperation between the storage component and the observation cavity, the transformer oil is introduced into the observation cavity, and the observation cavity is used to identify and detect the oil quality of the transformer oil. When the filtered transformer oil still does not meet the use requirements, the metal passivator in the storage component is mixed with the transformer oil, so that the metal passivator protects the inner wall of the transformer and reduces the precipitation of copper ions, thereby ensuring the service life of the transformer oil.

[0025] 2. Through the cooperation between the identification component and the detection component, the filter component can be fully detected, and the filtering problem of the filter component can be identified according to the status of the identification component and the detection component to ensure that the filter component is in a normal working state. When the filter component is blocked, the detection component is used to relieve the oil pressure in the oil chamber to ensure the stability of the connection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the connection structure of the overall device of the present invention;

[0027] Figure 2It is a schematic cross-sectional structure diagram of the overall device of the present invention;

[0028] Figure 3 is a schematic cross-sectional structure diagram of the filter assembly of the present invention;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the detection part of the present invention;

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the identification component of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the storage component of the present invention;

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the storage component of the present invention.

[0033] Description of the drawings: 1. Connecting assembly; 101. Observation shell; 1011. Oil return pipe; 1012. Observation chamber; 102. Constraint shell; 1021. Oil passage chamber; 1022. Through hole; 103. Oil outlet area; 1031. Oil outlet chamber; 2. Oil inlet pipe; 3. Detection assembly; 301. Transparent tube; 302. Detection unit; 3021. Fixed shell; 3022. Movable rod; 3023. Telescopic spring; 3024. Baffle; 4. Oil filter pipe; 5. Connecting plate; 6. Filter assembly; 601. First filter plate; 602. Second filter plate; 7. Storage assembly; 701. Annular shell; 702. Storage chamber; 703. Supply pipe; 704. Connecting hole; 8. Identification assembly; 801. Connecting shaft; 802. Disc; 803. Identification leaf. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 7 As shown, a transformer oil copper removal and filtering device comprises a connecting component 1 for filtering transformer oil, an oil inlet pipe 2 and an oil filter pipe 4 are respectively connected to the connecting component 1, and the oil inlet pipe 2 and the oil filter pipe 4 are both connected to the transformer, wherein when the oil in the transformer needs to be filtered, the transformer oil enters into the connecting component 1 through the oil inlet pipe 2, and after passing through the connecting component 1, it is replenished into the transformer through the filter oil pipe 4, thereby filtering the transformer oil.

[0036] The connecting assembly 1 includes a restraining shell 102, one end of which is connected to an observation shell 101, and the observation shell 101 is connected to the oil inlet pipe 2, wherein the observation shell 101 is made of a transparent material, and the oil inlet pipe 2 is always connected to the transformer, that is, during the use of the transformer, the color state of the oil in the transformer can be identified through the observation shell 101, so that the use of the transformer oil can be intuitively understood. At the same time, when the transformer oil is in a normal state, the transformer oil is always in the observation cavity 1012, and the restraining shell 102 is away from the observation cavity 1012. An oil outlet area 103 is connected to one end of the observation shell 101, a connecting plate 5 is connected between the observation shell 101 and the constraint shell 102, and the observation cavity 1012 is divided by the connecting plate 5, and a storage component 7 is connected between the constraint shell 102 and the oil outlet area 103. When an abnormality of the transformer oil is observed through the observation shell 101, the connecting plate 5 is controlled to be opened, so that the transformer oil in the observation shell 101 passes through the constraint shell 102 and the oil outlet area 103 in turn, is filtered and then re-injected into the transformer to complete the filtering of the transformer oil.

[0037] When the transformer is used for a long time, the transformer oil may damage the transformer, thereby affecting the normal use of the transformer. The storage component 7 includes an annular shell 701, a storage cavity 702 is provided in the annular shell 701, and a metal passivator is stored in the storage cavity 702. When the transformer oil is still in an unqualified state after being filtered by the constraint shell 102, the metal passivator is mixed with the hydraulic oil while maintaining the hydraulic oil filtration, thereby preventing the transformer oil from corroding the transformer and reducing the copper ions in the transformer oil.

[0038] The mechanism of action of metal passivators is a film-forming mechanism, that is, a chemical film is formed on the metal surface to prevent the metal and its ions from entering the oil, weakening its catalytic oxidation effect on the oil, and effectively protecting the metal surface. The chemical film formed by the metal passivator can also prevent the active sulfur, organic acid or free radicals from attacking the metal surface, thereby increasing the service life of the metal passivator.

[0039] In order to better observe the transformer oil, an observation chamber 1012 is further opened in the observation shell 101, in which the state of the transformer oil in the observation chamber 1012 is identified, and filter holes are opened on the connecting plate 5, and the opening and closing of the filter holes can be controlled. When the transformer oil is in a normal state, the filter holes on the connecting plate 5 are in a closed state to ensure that the transformer oil flows between the observation chamber 1012 and the transformer. When the transformer oil is in an abnormal state, the filter holes on the connecting plate 5 are controlled to open, so that the transformer oil is filtered through the connecting component 1 to ensure the normal use of the transformer oil.

[0040] In order to ensure that the transformer oil can be effectively filtered, further, an oil passage chamber 1021 is provided in the constraint shell 102. When the transformer oil identified by the observation chamber 1012 does not meet the standard, the connecting plate 5 is controlled to be opened, so that the transformer oil in the observation chamber 1012 enters the oil passage chamber 1021. The oil passage chamber 1021 is connected with a filter assembly 6 for filtering the transformer oil, and two through holes 1022 are provided on the cavity wall of the oil passage chamber 1021. The two through holes 1022 are both located on the side of the filter assembly 6 close to the observation chamber 1012. The constraint shell 10 2 is connected with two detection components 3, and the detection components 3 are connected to the through hole 1022. When the filter component 6 is in a normal filtering state, the transformer oil in the oil chamber 1021 will not form pressure on the detection component 3 through the through hole 1022. When the filtering state of the filter component 6 decreases, the transformer oil in the oil chamber 1021 will be squeezed, and the transformer oil in the oil chamber 1021 will squeeze the detection component 3 through the through hole 1022, causing the detection component 3 to deform, and the filtering condition of the filter component 6 can be effectively identified according to the deformation amount of the detection component 3.

[0041] Furthermore, an oil outlet cavity 1031 is provided in the oil outlet area 103 , and the oil outlet cavity 1031 is communicated with the oil filter pipe 4 , so that the filtered oil is replenished into the transformer through the oil outlet cavity 1031 and the oil filter pipe 4 .

[0042] In order to facilitate the observation of the state of the detection component 3 and timely discover the filtering state of the filter component 6, further, the detection component 3 includes a transparent tube 301, wherein the transparent tube 301 is connected to the constraint shell 102, and a detection part 302 is connected inside the transparent tube 301, and the detection part 302 is connected to the constraint shell 102. When the filtering efficiency of the filter component 6 decreases, the transformer oil in the oil passage cavity 1021 will increase, thereby causing the increased transformer oil to squeeze the detection part 302, thereby realizing the identification of the amount of transformer oil inside the oil passage cavity 1021, wherein the detection part 302 includes a fixed shell 3021, and the fixed shell 3021 is connected to the bottom of the transparent tube 301, and the fixed shell 3021 is connected to the bottom of the transparent tube 301. A movable rod 3022 is slidably provided on the shell 3021, and a baffle 3024 is connected to the end of the movable rod 3022 away from the fixed shell 3021. The baffle 3024 can be used to close the through hole 1022. When the oil in the oil chamber 1021 accumulates, the transformer oil in the oil chamber 1021 will squeeze the baffle 3024, thereby causing the baffle 3024 to move. A telescopic spring 3023 is connected between the fixed shell 3021 and the baffle 3024. The baffle 3024 can seal the through hole 1022. The working state of the filter assembly 6 is identified according to the moving position of the baffle 3024 in the transparent tube 301 to ensure the normal operation of the filter assembly 6.

[0043] When the filter assembly 6 is in a normal working state, the amount of oil entering the oil chamber 1021 is the same as the amount of oil leaving the filter assembly 6, and the position of the baffle 3024 in the transparent tube 301 does not change, that is, the detection assembly 3 detects that the transformer oil filtering device is in a normal filtering action. When the filter assembly 6 is in an abnormal working state, it means that the amount of oil entering the oil chamber 1021 is higher than the amount of oil leaving the filter assembly 6, and the amount of transformer oil in the oil chamber 1021 increases, so that the transformer oil drives the baffle 3024 to move in the transparent tube 301 through the through hole 1022, drives the movable rod 3022 to move, causes the telescopic spring 3023 to be compressed, and the filtering efficiency of the filter assembly 6 is judged according to the moving distance of the baffle 3024 in the transparent tube 301.

[0044] In order to ensure that the filter component 6 can effectively filter the transformer oil, further, the filter component 6 includes a first filter plate 601, and the end of the first filter plate 601 away from the observation chamber 1012 is connected to a second filter plate 602. The first filter plate 601 and the second filter plate 602 cooperate with each other to filter and screen out impurities and copper ions in the transformer oil to ensure the purity of the transformer oil, and the end of the second filter plate 602 away from the first filter plate 601 is connected to an identification component 8 for detecting the filtered oil. The identification component 8 is used to detect the transformer oil passing through the second filter plate 602 to ensure that the transformer oil filtered by the filter component 6 meets the filtering requirements, and ensure that the filter component 6 can maintain the filtering rate of the transformer oil while also being able to judge the filtering condition of the transformer oil after filtering.

[0045] Furthermore, the identification component 8 includes a connecting shaft 801, one end of which is connected to the second filter plate 602, and the end of the connecting shaft 801 away from the second filter plate 602 is connected to a disc 802, on which an identification leaf 803 is rotatably provided, wherein the identification leaf 803 is connected to a detection sensor, wherein the detection sensor includes but is not limited to a flow sensor and an oil quality sensor, and when the transformer oil passes through the second filter plate 602, the flow of the transformer oil will drive the identification leaf 803 to rotate, thereby realizing the detection of the transformer oil.

[0046] Furthermore, the storage component 7 also includes a supply pipe 703 for replenishing the metal passivator, the supply pipe 703 is connected to the storage cavity 702, and one end of the supply pipe 703 away from the storage cavity 702 passes through the connecting component 1 and is connected to the outside world. A connecting hole 704 is opened through the cavity wall of the storage cavity 702. When the transformer oil passes through the storage component 7 and it is identified that the transformer oil still does not meet the filtering standard, the metal passivator in the storage cavity 702 contacts and mixes with the transformer oil through the connecting hole 704 and moves with the transformer oil, thereby utilizing the metal passivator to protect the inside of the transformer, reduce the precipitation of copper ions inside the transformer, and achieve filtering and purification of the transformer oil.

[0047] Furthermore, an oil return pipe 1011 is connected to the observation shell 101, and the oil return pipe 1011 is connected to the observation chamber 1012, and the end of the oil return pipe 1011 away from the observation chamber 1012 is connected to the transformer, ensuring that when the transformer oil is in a normal state, the transformer oil in the observation shell 101 can flow back into the transformer to ensure the normal operation of the transformer.

[0048] During the copper removal and filtration process of the transformer oil, the transformer oil enters the observation chamber 1012 through the oil inlet pipe 2. By observing the usage of the transformer oil inside the observation chamber 1012, it is determined whether the transformer oil is filtered. When the observation chamber 1012 recognizes that the transformer oil is in normal use, the transformer oil enters the observation chamber 1012 through the oil inlet pipe 2, and then re-enters the transformer through the return oil pipe 1011, thereby realizing the status detection of the oil inside the transformer while ensuring that the transformer oil is in normal working condition.

[0049] When the observation chamber 1012 identifies that the transformer oil is in an abnormal state, the oil return pipe 1011 is closed and the connecting plate 5 is opened, so that the transformer oil entering the observation chamber 1012 can pass through the connecting plate 5 into the oil passage chamber 1021, and the transformer oil is filtered by the filter assembly 6 in the oil passage chamber 1021, and the filtered transformer oil enters the transformer through the oil outlet chamber 1031 and the oil filter pipe 4.

[0050] When the transformer oil is in the oil passage chamber 1021, the filtering rate of the filter assembly 6 can be identified by using the detection assembly 3. In the process of filtering the transformer oil through the filter assembly 6, when the filter assembly 6 is in a normal working state, the amount of oil entering the oil passage chamber 1021 is the same as the amount of oil leaving the filter assembly 6, and thus the position of the baffle 3024 in the transparent tube 301 does not change, that is, the detection assembly 3 detects that the transformer oil filtering device is in a normal filtering effect. When the filter assembly 6 is in an abnormal working state, it means that the amount of oil entering the oil passage chamber 1021 is higher than the amount of oil leaving the filter assembly 6, and the amount of transformer oil in the oil passage chamber 1021 increases, causing the transformer oil to pass through the through hole 102. 2 drives the baffle 3024 to move in the transparent tube 301, drives the movable rod 3022 to move, causes the telescopic spring 3023 to be compressed, thereby preventing the transformer oil from exerting a large pressure on the oil chamber 1021, which affects the stability of the connecting assembly 1, and realizes the filtration efficiency of the filter assembly 6 according to the moving distance of the baffle 3024 in the transparent tube 301. When the compression depth of the telescopic spring 3023 is small, the moving distance of the baffle 3024 in the transparent tube 301 is short, that is, at this time, although the filter assembly 6 is blocked, it can still perform effective filtration. When the compression depth of the telescopic spring 3023 increases and the increasing efficiency is fast, it means that the filtration efficiency of the filter assembly 6 drops sharply at this time, and the filter assembly 6 needs to be replaced.

[0051] After the transformer oil is filtered by the filter component 6, the identification component 8 is used to identify the state of the transformer oil to ensure that the filtered transformer oil meets the filtering requirements, that is, the identification leaf 803 is used to identify the components of the transformer oil, and the identification component 8 can cooperate with the detection component 3 to achieve all-round identification of the filter component 6. When the detection component 3 is compressed by the transformer oil, and the identification component 8 simultaneously identifies that the transformer oil passing through the filter component 6 is reduced, it means that the filter component 6 is blocked. When the detection component 3 is not compressed by the transformer oil, but the identification component 8 identifies that the transformer oil flow through the filter component 6 is increased, and there is no obvious improvement in the filtered transformer oil, it means that the filtering of the filter component 6 has failed and the filter component 6 needs to be replaced in time.

[0052] During the filtering process, when the observation chamber 1012 recognizes that the transformer oil has been significantly improved, the connecting plate 5 is adjusted to be closed and the return oil pipe 1011 is opened, so that the filter component 6 stops filtering and maintains the normal operation of the transformer. However, as the filtering proceeds, the identification leaf 803 recognizes that the transformer oil passing through the filter component 6 meets the filtering requirements. However, when the transformer oil in the observation chamber 1012 has not been significantly improved, the metal passivator in the storage chamber 702 is mixed with the transformer oil through the connecting hole 704 when the transformer oil passes through the storage component 7, so that the metal passivator protects the inside of the transformer until the transformer oil in the observation chamber 1012 returns to normal.

[0053] Through the cooperation between the identification component 8 and the detection component 3, all-round detection of the filter component 6 is achieved, and the filtering problems of the filter component 6 can be identified according to the status of the identification component 8 and the detection component 3, ensuring that the filter component 6 can be in a normal working state.

[0054] A filtering method implemented by a transformer oil copper removal filtering device comprises the following steps:

[0055] S1, the transformer oil enters the observation chamber 1012 through the oil inlet pipe 2, and the quality of the transformer oil is identified by using the observation chamber 1012;

[0056] S101, when the transformer oil is in a normal state, the transformer oil in the observation chamber 1012 enters the transformer through the oil return pipe 1011;

[0057] S102, when the transformer oil is in an abnormal state, the oil return pipe 1011 is controlled to be closed, and the connecting plate 5 is controlled to be opened, so that the transformer oil in the observation chamber 1012 enters the oil passage chamber 1021;

[0058] S2, the transformer oil enters the oil chamber 1021 through the connecting plate 5, is filtered by the filter assembly 6 in the oil chamber 1021, and then enters the transformer through the filter oil pipe 4;

[0059] S3, using the detection component 3 to identify the filtering state of the filtering component 6, and judging the filtering state of the filtering component 6 according to the moving position of the baffle 3024 in the transparent tube 301;

[0060] S4. When there is no obvious improvement in the transformer oil in the observation cavity 1012, the metal passivator in the storage component 7 is mixed with the transformer oil when the transformer oil passes through the storage component 7.

[0061] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer oil copper removal filter device, comprising a connecting assembly (1), characterized in that: The connecting assembly (1) is respectively connected to an oil inlet pipe (2) and an oil filter pipe (4), and the oil inlet pipe (2) and the oil filter pipe (4) are both connected to the transformer; The connection assembly (1) comprises a restraining shell (102), one end of the restraining shell (102) being connected to an observation shell (101), the observation shell (101) being connected to the oil inlet pipe (2), and one end of the restraining shell (102) away from the observation shell (101) being connected to an oil outlet area (103), a connecting plate (5) being connected between the observation shell (101) and the restraining shell (102), and a storage assembly (7) being connected between the restraining shell (102) and the oil outlet area (103); The storage component (7) comprises an annular shell (701), a storage cavity (702) is provided in the annular shell (701), and a metal passivating agent is stored in the storage cavity (702); An observation cavity (1012) is provided in the observation shell (101), and a filter hole is provided on the connecting plate (5), and the opening and closing of the filter hole can be controlled; An oil passage cavity (1021) is provided through the restraining shell (102), a filter assembly (6) is connected to the oil passage cavity (1021), and two through holes (1022) are provided on the cavity wall of the oil passage cavity (1021), the two through holes (1022) are both located on a side of the filter assembly (6) close to the observation cavity (1012), and two detection assemblies (3) are connected to the restraining shell (102), and the detection assemblies (3) are both connected to the through holes (1022); The detection component (3) comprises a transparent tube (301), a detection unit (302) is connected to the inside of the transparent tube (301), the detection unit (302) is in communication with the constraint shell (102), the detection unit (302) comprises a fixed shell (3021), a movable rod (3022) is slidably provided on the fixed shell (3021), a baffle (3024) is connected to one end of the movable rod (3022) away from the fixed shell (3021), a telescopic spring (3023) is connected between the fixed shell (3021) and the baffle (3024), and the baffle (3024) is capable of sealing the through hole (1022).

2. The transformer oil copper removal filter device according to claim 1, characterized in that: An oil outlet cavity (1031) is provided in the oil outlet area (103), and the oil outlet cavity (1031) is in communication with the oil filter pipe (4).

3. The transformer oil copper removal filter device according to claim 1, characterized in that: The filter assembly (6) comprises a first filter plate (601), one end of the first filter plate (601) away from the observation chamber (1012) being connected to a second filter plate (602), and one end of the second filter plate (602) away from the first filter plate (601) being connected to an identification assembly (8) for detecting filtered oil.

4. The transformer oil copper removal filter device according to claim 3 is characterized in that: The identification component (8) comprises a connecting shaft (801), one end of the connecting shaft (801) being connected to the second filter plate (602), and one end of the connecting shaft (801) away from the second filter plate (602) being connected to a disk (802), on which an identification leaf (803) is rotatably provided.

5. The transformer oil copper removal filter device according to claim 1, characterized in that: The storage component (7) further comprises a supply pipe (703), wherein the supply pipe (703) is in communication with the storage cavity (702); one end of the supply pipe (703) away from the storage cavity (702) passes through the connection component (1) to communicate with the outside; and a communication hole (704) is provided through the cavity wall of the storage cavity (702).

6. The transformer oil copper removal filter device according to claim 1, characterized in that: An oil return pipe (1011) is connected to the observation shell (101), the oil return pipe (1011) is in communication with the inside of the observation chamber (1012), and one end of the oil return pipe (1011) away from the observation chamber (1012) is in communication with the transformer.

7. A filtering method, using the transformer oil copper removal filtering device as claimed in claim 1, characterized in that: The following steps are involved: S1, allowing transformer oil to enter the observation chamber (1012) through the oil inlet pipe (2), and using the observation chamber (1012) to identify the quality of the transformer oil; S2, the transformer oil enters the oil passage chamber (1021) through the connecting plate (5), is filtered by the filter assembly (6) in the oil passage chamber (1021), and then enters the interior of the transformer through the filter oil pipe (4); S3, using the detection component (3) to identify the filtering state of the filtering component (6), and judging the filtering state of the filtering component (6) according to the moving position of the baffle (3024) in the transparent tube (301); S4. When there is no obvious improvement in the transformer oil in the observation chamber (1012), the metal passivator in the storage assembly (7) mixes with the transformer oil when the transformer oil passes through the storage assembly (7).

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