Oil conservator moisture absorption device for transformer

Abstract

The invention relates to the technical field of transformers, and provides an oil conservator moisture absorption device for a transformer, the oil conservator moisture absorption device comprises a shell, a top cover and a bottom plate, the shell comprises a first barrel, a second barrel and a third barrel which are concentrically arranged from outside to inside, and the first barrel and the third barrel define an air inlet space; the second barrel divides the air inlet space into a first air passing cavity and a second air passing cavity, a first air passing opening communicating with the first air passing cavity and the outside is formed in the top of the first barrel, a second air passing opening communicating with the first air passing cavity and the second air passing cavity is formed in the bottom of the second barrel, and a containing space for containing the drying barrel is defined by the third barrel. The top of the third barrel is provided with a third air passing opening communicating with the second air passing cavity and the drying space, an air vent communicating with the drying space and the containing space is formed in the upper end of the drying barrel, the bottom end of the drying space communicates with the outside through a connecting pipe, and transformer oil is contained in the bottom of the air inlet space. The invention aims to provide the oil conservator moisture absorption device for the transformer, which can prevent the transformer oil from polluting the drying agent.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to an oil pillow moisture absorption device for a transformer. Background Art

[0002] Oil-immersed transformers are usually equipped with an oil pillow. When the volume of the transformer oil in the transformer expands or decreases with the temperature of the transformer oil, the oil pillow can adjust the oil amount to ensure that the transformer tank is always full of oil. When the transformer oil in the transformer expands due to heat, the oil pillow will exhale excess air inside; when the transformer oil in the transformer cools down and contracts, the oil pillow will inhale air from the external space. In order to prevent the transformer oil inside the transformer and the oil pillow from getting damp and to ensure the insulation strength of the transformer oil, a desiccant device needs to be set to filter and absorb moisture from the external air.

[0003] The commonly used desiccant device is a transformer respirator. When the oil pillow inhales external air, the external air first passes through the transformer oil stored in the oil cup at the bottom of the desiccant device, thereby filtering the dust in the external air. Then the external air passes through the glass tube of the desiccant device, and the desiccant in the glass tube absorbs the moisture in the external air, so that the transformer oil in the oil pillow is not invaded by moisture and dust in the external air. However, this desiccant device has some shortcomings during use: when the oil pillow absorbs a large amount of air, the ventilation volume in the oil cup at the bottom of the desiccant device becomes larger, and a large number of bubbles are formed in the transformer oil stored in the oil cup at the bottom of the desiccant device, causing the transformer oil in the oil cup at the bottom of the desiccant device to splash upward, causing large-scale pollution of the desiccant, and reducing the desiccant's desiccant effect. Therefore, it is necessary to propose an oil pillow desiccant device for a transformer that can prevent the transformer oil from contaminating the desiccant. Summary of the invention

[0004] The main purpose of the present invention is to provide an oil pillow moisture absorption device for a transformer which can prevent transformer oil from contaminating a desiccant.

[0005] To achieve the above-mentioned purpose, the oil pillow desiccant device for a transformer proposed in the present invention comprises a desiccant device body, the desiccant device body comprises a shell, a top cover and a bottom plate, the shell comprises a first cylinder, a second cylinder and a third cylinder which are concentrically arranged from the outside to the inside, the top cover is used to close the top end opening of the shell, the bottom plate is used to close the bottom end opening of the shell, the inner wall surface of the first cylinder and the outer wall surface of the third cylinder are combined to form an air intake space, the second cylinder divides the air intake space into a first air passage cavity and a second air passage cavity, and a third cylinder for connecting the first air passage cavity with the external space is provided on the top of the first cylinder. an air port, a second air port for connecting the first air cavity and the second air cavity is provided at the bottom of the second cylinder, the inner wall surface of the third cylinder is enclosed to form a storage space for accommodating a drying cylinder, a plurality of third air ports for connecting the second air cavity and the storage space are provided on the top of the third cylinder, the drying cylinder is enclosed to form a drying space for accommodating a desiccant, a plurality of air vents connecting the drying space and the storage space are formed at the upper end of the drying cylinder, the bottom end of the drying space is connected to the internal space of the oil pillow through a connecting pipe, and the bottom of the air inlet space contains transformer oil that immerses the second air port.

[0006] Preferably, the drying cylinder is a cylinder, the top cover and the bottom plate are both circular structural parts, the top cover is detachably connected to the outer shell, and the top surface of the bottom plate is fixedly connected to the bottom surfaces of the first cylinder, the second cylinder and the third cylinder respectively.

[0007] Preferably, the oil pillow moisture absorption device for the transformer also includes a water collector, which encloses a water collection space, and the bottom plate is provided with a drain outlet along the thickness direction of the cover body, and a connecting structure is provided on the upper part of the water collector, and the connecting structure is used to connect with the drain outlet so that the water collection space can receive the water discharged from the drain outlet.

[0008] Preferably, a connecting port is provided on the bottom surface of the drying cylinder, one end of the connecting pipe is connected with the interior of the drying cylinder through the connecting port, and the other end of the connecting pipe is used to connect with the interior of the oil pillow through a pipeline. A through hole is formed in the middle of the bottom plate for the connecting pipe to pass through, and the water collector is an annular structure, and the water collector is arranged around the through hole.

[0009] Preferably, the top surface of the bottom plate protrudes away from the bottom plate to form a lower fixing ring for clamping the bottom end of the drying cylinder, and the bottom surface of the top cover protrudes away from the top cover to form an upper fixing ring for clamping the top end of the drying cylinder, the upper fixing ring and the lower fixing ring are respectively arranged concentrically with the third cylinder body, and the drain outlet is arranged between the third cylinder body and the lower fixing ring.

[0010] Preferably, an electric heating element is arranged in the drying cylinder, the electric heating element is arranged spirally and concentrically with the drying cylinder, the electric heating element is connected to an external power supply through an electric wire, the top cover is formed with a wire hole for the wire to pass through, and the wire hole is located between the upper fixing ring and the third cylinder body.

[0011] Preferably, a transparent observation window is provided in the middle of the top cover, the drying cylinder is a transparent structural member, and the transparent observation window is arranged concentrically with the drying cylinder to facilitate an operator to observe the interior of the drying cylinder.

[0012] Preferably, the oil pillow moisture absorption device for the transformer further comprises a cooling element, the cooling element is arranged between the third cylinder and the outer wall surface of the drying cylinder, and the cooling element comprises a plurality of cooling plates arranged along the length direction of the third cylinder.

[0013] Preferably, the cooling element further comprises a cooling ring, the cooling ring is arranged concentrically with the third cylinder, the cooling ring is arranged in the cooling space, and the top end of each cooling plate is respectively connected to the cooling ring.

[0014] Preferably, the oil pillow desiccant device for the transformer also includes a waterproof cover, which is used to cover the main body of the desiccant device, one end of the waterproof cover is connected to the top surface of the top cover, and the other end of the waterproof cover is formed with a guide surface for guiding rainwater to slide off the edge of the waterproof cover.

[0015] In the technical solution of the present invention, the working principle of the oil pillow moisture absorption device for the transformer is as follows:

[0016] When the transformer oil in the oil pillow cools down and the oil pillow inhales air, the gas in the external space enters the first air cavity from the first air port at the top of the first cylinder, flows downward along the first air cavity, passes through the transformer oil contained at the bottom of the air intake space, enters the second air cavity from the second air hole at the bottom of the second cylinder, then flows upward along the second air cavity, enters the containing space through the third air port at the top of the third cylinder, and then enters the interior of the drying cylinder from the air vent. The desiccant in the drying cylinder absorbs moisture in the gas, and finally the dry gas enters the oil pillow through the connecting pipe;

[0017] When the transformer oil in the oil conservator is heated up and the oil conservator is exhausted, the exhausted gas enters the bottom end of the drying cylinder through the connecting pipe, then flows along the length direction of the drying cylinder toward the upper end of the drying cylinder, enters the accommodating space from the vent hole at the upper end of the drying cylinder, then enters the second air passage cavity through the third air passage port, then flows through the second air passage cavity, enters the first air passage cavity from the second air passage port, then flows through the first air passage cavity, and is exhausted from the first air passage port;

[0018] In summary, by arranging the first cylinder, the second cylinder and the third cylinder, the inner wall surface of the first cylinder and the outer wall surface of the third cylinder are combined to form an air intake space, the bottom of the air intake space accommodates transformer oil, the drying cylinder is accommodated in the accommodating space formed by the inner wall surface of the third cylinder, and the transformer oil and the drying cylinder are separated by the third cylinder, so as to avoid the transformer oil splashing and contaminating the desiccant when the oil pillow inhales external air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of an oil pillow moisture absorption device for a transformer according to the present invention;

[0021] Figure 2 An exploded view of an oil pillow moisture absorption device for a transformer;

[0022] Figure 3 It is a cross-sectional view of the main body of the moisture absorption device.

[0023] Description of Figure Numbers:

[0024] 1-main body of the desiccant device; 11-shell; 111-first cylinder; 111a-first air outlet; 112-second cylinder; 112a-second air outlet; 113-third cylinder; 113a-third air outlet; 12-top cover; 2-drying cylinder; 21-air vent; 3-cooling element; 31-cooling ring; 32-cooling plate; 4-water collector; 41-connecting structure; 5-connecting pipe.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] 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.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The invention provides an oil pillow moisture absorption device for a transformer.

[0032] Please refer to Figures 1 to 3The oil conservator moisture absorption device for a transformer comprises a moisture absorption device body 1, the moisture absorption device body 1 comprises a shell 11, a top cover 12 and a bottom plate, the shell 11 comprises a first cylinder 111, a second cylinder 112 and a third cylinder 113 which are arranged concentrically from outside to inside, the top cover 12 is used to close the top end opening of the shell 11, the bottom plate is used to close the bottom end opening of the shell 11, the inner wall surface of the first cylinder 111 and the outer wall surface of the third cylinder 113 are surrounded to form an air intake space, the second cylinder 112 divides the air intake space into a first air passage cavity and a second air passage cavity, and a first air passage cavity for connecting the first air passage cavity with an external space is arranged on the top of the first cylinder 111 The second cylinder 112 has a second air port 112a for connecting the first air cavity and the second air cavity at the bottom. The inner wall of the third cylinder 113 is enclosed to form a storage space for accommodating the drying cylinder 2. The top of the third cylinder is provided with a plurality of third air ports 113a for connecting the second air cavity and the storage space. The drying cylinder 2 is enclosed to form a drying space for accommodating the desiccant. The upper end of the drying cylinder 2 is formed with a plurality of vents 21 for connecting the drying space and the storage space. The bottom end of the drying space is connected to the inner space of the oil pillow through the connecting pipe 5. The bottom of the air intake space contains transformer oil that immerses the second air port 112a. The transformer oil is contained at the bottom of the air intake space to immerse the second air port 112a, so as to prevent the air in the external space from entering the second air cavity when the oil pillow is not inhaled. At the same time, the transformer oil can absorb dust in the external air.

[0033] In the technical solution of the present invention, the working principle of the oil pillow moisture absorption device for the transformer is as follows:

[0034] When the transformer oil in the oil pillow cools down and the oil pillow inhales air, the gas in the external space enters the first air cavity from the first air port 111a at the top of the first cylinder 111, flows downward along the first air cavity, passes through the transformer oil contained at the bottom of the air intake space, enters the second air cavity from the second air hole at the bottom of the second cylinder 112, then flows upward along the second air cavity, enters the containing space through the third air port 113a at the top of the third cylinder 113, and then enters the interior of the drying cylinder 2 from the air vent 21. The desiccant in the drying cylinder 2 absorbs moisture in the gas, and finally the dry gas enters the oil pillow through the connecting pipe 5;

[0035] When the transformer oil in the oil pillow is heated up and the oil pillow is exhausted, the exhausted gas enters the bottom end of the drying cylinder 2 through the connecting pipe 5, then flows along the length direction of the drying cylinder 2 toward the upper end of the drying cylinder 2, enters the accommodating space from the vent hole 21 at the upper end of the drying cylinder 2, then enters the second air cavity through the third air port 113a, then flows through the second air cavity, enters the first air cavity from the second air port 112a, then flows through the first air cavity, and is exhausted from the first air port 111a;

[0036] In summary, by providing the first cylinder 111, the second cylinder 112 and the third cylinder 113, the inner wall surface of the first cylinder 111 and the outer wall surface of the third cylinder 113 are combined to form an air intake space, the bottom of the air intake space contains transformer oil, the drying cylinder 2 is contained in the containing space formed by the inner wall surface of the third cylinder 113, and the transformer oil and the drying cylinder 2 are separated by the third cylinder 113, so as to avoid the transformer oil splashing and contaminating the desiccant when the oil pillow inhales external air.

[0037] Preferably, the drying cylinder 2 is a cylinder, the top cover 12 and the bottom plate are both circular structural members, the top cover 12 is detachably connected to the shell, and the top surface of the bottom plate is respectively fixedly connected to the bottom surface of the first cylinder 111, the bottom surface of the second cylinder 112, and the bottom surface of the third cylinder 113. In this embodiment, a sealing ring is also provided at the connection between the top cover 12 and the first cylinder 111 to prevent water-containing air in the external space from entering the interior of the oil pillow moisture absorption device for the transformer through the gap between the top cover 12 and the first cylinder 111.

[0038] Preferably, the oil pillow moisture absorption device for the transformer also includes a water collector 4, the water collector 4 encloses a water collection space, the bottom plate is provided with a drain port through the thickness direction of the cover body, and a connecting structure 41 is provided on the upper part of the water collector 4, the connecting structure 41 is used to communicate with the drain port so that the water collection space can receive the water discharged from the drain port. When the hot air in the transformer enters the drying cylinder 2, it will heat the desiccant in the drying cylinder 2, so that the water adsorbed by the desiccant evaporates, and then cools and condenses into water droplets on the inner wall surface of the third cylinder 113 and the outer wall surface of the drying cylinder 2. The water droplets gather and flow down to the bottom of the accommodating space, and then gather into the water collection space through the drain port, thereby improving the service life of the desiccant in the drying cylinder 2; in this embodiment, the connecting structure 41 extends vertically upward to form a tubular structure, the connecting structure 41 is used to be plugged into the drain port, and the outer wall surface of the connecting structure 41 is tightly connected with the inner wall surface of the drain port.

[0039] Preferably, the bottom surface of the drying cylinder 2 is provided with a connection port, one end of the connection pipe 5 is connected to the inside of the drying cylinder 2 through the connection port, and the other end of the connection pipe 5 is used to communicate with the inside of the oil pillow through a pipeline, and a through hole is formed through the middle of the bottom plate for the connection pipe 5 to pass through, and the water collector 4 is an annular structure, and the water collector 4 is arranged around the through hole. In this embodiment, there are multiple drain ports, and the connecting structure 41 is arranged one by one with the drain ports, and each drain port is evenly arranged around the center of the bottom plate.

[0040] Preferably, the top surface of the bottom plate is protruded away from the bottom plate to form a lower fixing ring for clamping the bottom end of the drying cylinder 2, and the bottom surface of the top cover 12 is protruded away from the top cover 12 to form an upper fixing ring for clamping the top end of the drying cylinder 2, and the upper fixing ring and the lower fixing ring are respectively arranged concentrically with the third cylinder 113, and the drain port is arranged between the third cylinder 113 and the lower fixing ring. The upper fixing ring and the lower fixing ring are arranged to cooperate with the clamping to fix the drying cylinder 2; in this embodiment, the bottom surface of the drying cylinder 2 is used to fit on the top surface of the bottom plate, and the bottom surface of the top cover 12 is used to fit on the top surface of the drying cylinder 2.

[0041] Preferably, an electric heating element is provided in the drying cylinder 2, the electric heating element is arranged in a spiral, and the electric heating element is arranged concentrically with the drying cylinder 2, the electric heating element is connected to an external power source through a wire, the top cover 12 is formed with a wire hole for the wire to pass through, and the wire hole is located between the upper fixing ring and the third cylinder 113. The electric heating element is provided to heat the desiccant in the drying cylinder 2 and discharge the moisture absorbed by the desiccant, so that the desiccant in the drying cylinder 2 can be reused.

[0042] Preferably, a transparent observation window is provided in the middle of the top cover 12, and the drying cylinder 2 is a transparent structural member. The transparent observation window is arranged concentrically with the drying cylinder 2, so that the operator can observe the interior of the drying cylinder 2. The transparent observation window is arranged to facilitate the operator to observe the interior of the drying cylinder 2, so as to judge whether the desiccant in the drying cylinder 2 needs to be heated according to the color of the desiccant; in this embodiment, the oil pillow moisture absorption device for the transformer also includes a camera and an analysis control module, and the analysis control module is connected to the camera and the electric heating element respectively. The camera is arranged in the transparent observation window to observe the desiccant inside the drying cylinder 2, and the analysis control module is used to receive the image of the camera, identify the image color, and turn on the electric heating element after the set color in the received image reaches the set range, and turn off the electric heating element after the set time.

[0043] Specifically, the upper fixing ring is arranged around the transparent observation window, and the desiccant is color-changing silica gel. The desiccant is blue when dry and purple after absorbing water and becoming wet.

[0044] Preferably, the oil pillow moisture absorption device for the transformer further includes a cooling element 3, which is arranged between the third cylinder 113 and the outer wall surface of the drying cylinder 2, and includes a plurality of cooling plates 32 arranged along the length direction of the third cylinder 113. The cooling element 3 is arranged to accelerate the condensation speed of water vapor, and the cooling plates 32 can guide the condensed water to slide downward; in this embodiment, the cooling element 3 is a metal structural member, and the top surface of the bottom plate is recessed to the bottom surface of the top cover 12 to form a plurality of rectangular grooves and an annular groove, and the rectangular grooves are arranged one by one with the cooling plates 32, and the bottom ends of the cooling plates 32 are accommodated in the corresponding rectangular grooves, and each rectangular groove is respectively connected to the annular groove, and the top of each drain port is connected to the bottom of the annular groove.

[0045] Preferably, the cooling element 3 further comprises a cooling ring 31, the cooling ring 31 is arranged concentrically with the third cylinder 113, the cooling ring 31 is arranged in the cooling space, and the top ends of the cooling plates 32 are respectively connected to the cooling ring 31. The cooling ring 31 is arranged so that the operator can grab the cooling ring 31 to conveniently take out and install the cooling element 3.

[0046] Preferably, the oil pillow moisture absorption device for transformer further comprises a waterproof cover, the waterproof cover is used to cover the moisture absorption device body 1, one end of the waterproof cover is connected to the top surface of the top cover 12, and the other end of the waterproof cover is formed with a guide surface for guiding rainwater to slide down from the edge of the waterproof cover. The waterproof cover is provided to cover the moisture absorption device body 1 to prevent rainwater from falling into the air intake space through the first air outlet 111a and contaminating the transformer oil in the air intake space; in this embodiment, the waterproof cover is a hollow conical structure, and the apex of the waterproof cover is away from the moisture absorption device body 1.

[0047] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A moisture absorption device for an oil conservator of a transformer, characterized in that: The invention comprises a desiccant device body, wherein the desiccant device body comprises a shell, a top cover and a bottom plate, wherein the shell comprises a first cylinder, a second cylinder and a third cylinder which are concentrically arranged from the outside to the inside, wherein the top cover is used to close the top end opening of the shell, wherein the bottom plate is used to close the bottom end opening of the shell, wherein the inner wall surface of the first cylinder and the outer wall surface of the third cylinder are combined to form an air intake space, wherein the second cylinder divides the air intake space into a first air passage cavity and a second air passage cavity, wherein a first air passage port for connecting the first air passage cavity with an external space is arranged at the top of the first cylinder, and a second air passage port for connecting the first air passage cavity with an external space is arranged at the bottom of the second cylinder. A second air port for connecting the first air cavity and the second air cavity is provided, the inner wall surface of the third cylinder body is enclosed to form a storage space for accommodating a drying cylinder, a plurality of third air ports for connecting the second air cavity and the storage space are provided on the top of the third cylinder body, the drying cylinder is enclosed to form a drying space for accommodating a desiccant, a plurality of air vents connecting the drying space and the storage space are formed at the upper end of the drying cylinder, the bottom end of the drying space is connected to the internal space of the oil pillow through a connecting pipe, and the bottom of the air inlet space contains transformer oil that immerses the second air port.

2. The oil conservator moisture absorption device for transformer according to claim 1, characterized in that: The drying cylinder is a cylinder, the top cover and the bottom plate are both circular structural parts, the top cover is detachably connected to the outer shell, and the top surface of the bottom plate is fixedly connected to the bottom surfaces of the first cylinder, the second cylinder and the third cylinder respectively.

3. The oil conservator moisture absorption device for transformer according to claim 1, characterized in that: It also includes a water collector, which encloses a water collection space. The bottom plate is provided with a drain outlet along the thickness direction of the cover body. A connecting structure is provided on the upper part of the water collector, and the connecting structure is used to connect with the drain outlet so that the water collection space can receive the water discharged from the drain outlet.

4. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: A connecting port is provided on the bottom surface of the drying cylinder, one end of the connecting pipe is connected to the interior of the drying cylinder through the connecting port, and the other end of the connecting pipe is used to communicate with the interior of the oil pillow through a pipeline. A through hole is formed in the middle of the bottom plate for the connecting pipe to pass through, and the water collector is an annular structure, and the water collector is arranged around the through hole.

5. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: The top surface of the bottom plate is protruded away from the bottom plate to form a lower fixing ring for clamping the bottom end of the drying cylinder, and the bottom surface of the top cover is protruded away from the top cover to form an upper fixing ring for clamping the top end of the drying cylinder, the upper fixing ring and the lower fixing ring are respectively arranged concentrically with the third cylinder body, and the drain outlet is arranged between the third cylinder body and the lower fixing ring.

6. The oil conservator moisture absorption device for transformer according to claim 5, characterized in that: An electric heating element is arranged in the drying cylinder, the electric heating element is arranged spirally and concentrically with the drying cylinder, the electric heating element is connected to an external power supply through an electric wire, the top cover is formed with a wire hole for the wire to pass through, and the wire hole is located between the upper fixing ring and the third cylinder.

7. The oil conservator moisture absorption device for transformer according to claim 5, characterized in that: A transparent observation window is arranged in the middle of the top cover, and the drying cylinder is a transparent structural member. The transparent observation window is arranged concentrically with the drying cylinder to facilitate operators to observe the interior of the drying cylinder.

8. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: It also includes a cooling element, which is arranged between the third cylinder and the outer wall surface of the drying cylinder, and includes a plurality of cooling plates arranged along the length direction of the third cylinder.

9. The oil conservator moisture absorption device for transformer according to claim 8, characterized in that: The cooling element further comprises a cooling ring, which is arranged concentrically with the third cylinder, and the cooling ring is arranged in the cooling space, and the top ends of the cooling plates are respectively connected to the cooling ring.

10. The oil conservator moisture absorption device for a transformer according to any one of claims 1 to 9, characterized in that: It also includes a waterproof cover, which is used to cover the moisture absorbing device body. One end of the waterproof cover is connected to the top surface of the top cover, and the other end of the waterproof cover is formed with a guide surface for guiding rainwater to slide down from the edge of the waterproof cover.

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