A cover plate for a transformer sensor

Abstract

The utility model discloses a kind of adsorber cover plates for mutual inductor, comprising: mutual inductor, the inner wall of the side of mutual inductor is fixedly connected with interface flange, the outer wall of interface flange is fixedly connected with adsorption structure, the outer wall of the side, far from interface flange of adsorption structure, is fixedly connected with explosion-proof cover;The utility model relates to the technical field of adsorber, the adsorption structure, by arc tube cavity and transverse adsorbent frame combination design, arc tube passage guides gas to flow along curve, cooperate with the adsorbent frame of lateral arrangement, prolong the contact time of gas and adsorbent, make gas and adsorbent fully react, by modularization detachable structure to realize convenient maintenance, when replacing adsorbent, the connection of entire adsorption structure and mutual inductor does not need to be disassembled, just need to loosen connecting hole bolt, open upper semicircular tube, adsorbent frame can be drawn out along clamping groove, complete adsorbent replacement by buckle groove opening sealing plug, reduce the dependence on operating space and professional tool.

Description

Technical Field

[0001] This utility model relates to the field of adsorber technology, specifically to an adsorber cover plate for a current transformer. Background Technology

[0002] As a key device in the power system for voltage and current transformation, the internal insulation performance of the instrument transformer directly affects the safety and stability of the power grid operation. During the long-term operation of the instrument transformer, the insulating oil will produce volatile gases due to temperature changes, and moisture in the environment may seep into the equipment. If these gaseous impurities are not adsorbed and treated in time, they can easily lead to faults such as reduced insulation strength and partial discharge, or even damage to the equipment.

[0003] Replacing the adsorbent in a traditional adsorber cover requires disassembling the entire connection structure between the cover and the current transformer. This maintenance is cumbersome, requiring not only specialized tools and ample operating space, but also the risk of gas leakage due to repeated disassembly causing aging of seals and loosening of connecting bolts. Furthermore, the adsorbent frame lacks guidance and positioning design during loading and unloading, resulting in a long replacement time and severely impacting the equipment's operational efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an adsorbent cover plate for current transformers, which solves the problems of cumbersome adsorbent replacement and maintenance operations in traditional adsorbent cover plates.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A current transformer adsorber cover plate includes: a current transformer, an interface flange fixedly connected to the inner wall of the side of the current transformer, an adsorption structure fixedly connected to the outer wall of the interface flange, and an explosion-proof cover fixedly connected to the outer wall of the adsorption structure on the side away from the interface flange; the adsorption structure includes a lower semi-arc tube, an upper semi-arc tube rotatably connected to the outer wall of the top of the lower semi-arc tube, connecting flanges fixedly connected to the outer walls of both sides of the lower semi-arc tube, slots formed on the inner walls of both the lower and upper semi-arc tubes, connecting holes formed on the outer walls of both the lower and upper semi-arc tubes, and sealing gaskets symmetrically fixedly connected to the outer wall of the lower semi-arc tube.

[0009] Preferably, the slot is arranged laterally along the inner wall of the lower and upper semi-arc tubes, and the connecting holes are arranged laterally along the outer wall of the lower and upper semi-arc tubes. The inner wall of the upper semi-arc tube is in contact with the outer wall of the sealing gasket, and the lower and upper semi-arc tubes are fixedly connected by bolts passing through the connecting holes. The outer wall of the lower semi-arc tube of the adsorption structure is symmetrically fixed with sealing gaskets. When the upper semi-arc tube is closed around the rotation axis, its inner wall is in close contact with the sealing gasket, and is tightened with bolts in the connecting holes to achieve a seal at the joint of the arc tubes and prevent gas leakage.

[0010] Preferably, an adsorbent frame is slidably connected to the inner wall of the slot, and a mesh is symmetrically fixed to the inner wall of the side of the adsorbent frame. An inlet and outlet are provided on the outer wall of the top of the adsorbent frame, and a buckle groove is provided on the outer wall of the side of the inlet and outlet. A sealing plug is slidably connected to the inner wall of the inlet and outlet.

[0011] Preferably, the grooves are arranged on both sides of the sealing plug, and the adsorbent frame is arranged laterally along the inner walls of the lower and upper semi-circular tubes, which can guide gas flow, prolong the contact time with the adsorbent, and improve adsorption efficiency.

[0012] Preferably, the connecting flange is fixedly connected to the interface flange by bolts, and the connecting flange on the side of the lower semi-arc tube away from the interface flange is fixedly connected to the explosion-proof cover by bolts. The explosion-proof cover is made of a combination of aluminum foil and aramid fiber. The inner aluminum foil ensures airtightness and precise explosion, while the outer aramid fiber enhances tear resistance and prevents fragments from falling off after explosion. It has a higher fatigue life than pure metal and is suitable for current transformers with frequent internal pressure fluctuations.

[0013] (III) Beneficial Effects

[0014] This utility model provides an adsorbent cover plate for a current transformer. It has the following beneficial effects:

[0015] (i) The adsorption structure is designed by combining an arc-shaped tube cavity with a transverse adsorbent frame. The arc-shaped tube channel guides the gas to flow along the curve. Combined with the transversely set adsorbent frame, the contact time between the gas and the adsorbent is extended. The mesh on both sides of the adsorbent frame not only allows the gas to pass freely but also prevents the diffusion of adsorbent particles, so that the gas and adsorbent can react fully. This improves the adsorption efficiency of insulating oil volatile gas, moisture, etc., reduces the risk of insulation performance degradation caused by gas impurities inside the transformer, and ensures the stability of equipment operation.

[0016] (ii) The adsorbent frame is easy to maintain through its modular and detachable structure. When replacing the adsorbent, it is not necessary to disassemble the entire adsorption structure and the current transformer. Simply loosen the bolts in the connecting hole and open the upper half-arc tube to pull out the adsorbent frame along the slot. The adsorbent can be replaced by opening the sealing plug through the slot. Compared with the complicated process of traditional cover plates that require overall disassembly, this design shortens the maintenance time, reduces the dependence on operating space and professional tools, and significantly improves the efficiency of equipment operation and maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the adsorption structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the adsorption structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the adsorbent frame of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the explosion-proof cover of this utility model.

[0022] In the diagram: 1. Current transformer; 2. Adsorption structure; 3. Interface flange; 4. Explosion-proof cover; 21. Lower semi-circular tube; 22. Upper semi-circular tube; 23. Connecting flange; 24. Slot; 25. Connecting hole; 26. Sealing gasket; 27. Adsorbent frame; 28. Mesh screen; 29. ​​Inlet and outlet; 291. Clip; 292. Sealing plug. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5This utility model provides a technical solution: an adsorbent cover for a current transformer, comprising: a current transformer 1, an interface flange 3 fixedly connected to the inner wall of the side of the current transformer 1, an adsorption structure 2 fixedly connected to the outer wall of the interface flange 3, and an explosion-proof cover 4 fixedly connected to the outer wall of the adsorption structure 2 on the side away from the interface flange 3; the adsorption structure 2 includes a lower semi-arc tube 21, an upper semi-arc tube 22 rotatably connected to the outer wall of the top of the lower semi-arc tube 21, connecting flanges 23 fixedly connected to the outer walls of both the sides of the lower semi-arc tube 21, slots 24 opened on the inner walls of both the lower semi-arc tube 21 and the upper semi-arc tube 22, connecting holes 25 opened on the outer walls of both the lower semi-arc tube 21 and the upper semi-arc tube 22, and sealing gaskets 26 symmetrically fixedly connected to the outer wall of the lower semi-arc tube 21.

[0025] The slot 24 is arranged laterally along the inner wall of the lower semi-arc tube 21 and the upper semi-arc tube 22. The connecting hole 25 is arranged laterally along the outer wall of the lower semi-arc tube 21 and the upper semi-arc tube 22. The inner wall of the upper semi-arc tube 22 is in contact with the outer wall of the sealing gasket 26. The lower semi-arc tube 21 and the upper semi-arc tube 22 are fixedly connected by bolts passing through the connecting hole 25. The outer wall of the lower semi-arc tube 21 of the adsorption structure 2 is symmetrically fixed with sealing gaskets 26. When the upper semi-arc tube 22 is closed around the rotation axis, its inner wall is in close contact with the sealing gasket 26. It is tightened with bolts in the connecting hole 25 to achieve sealing at the joint of the arc tubes and prevent gas leakage.

[0026] The inner wall of the slot 24 is slidably connected to an adsorbent frame 27. The inner wall of the side of the adsorbent frame 27 is symmetrically fixedly connected to a mesh 28. The outer wall of the top of the adsorbent frame 27 is provided with an inlet and outlet 29. The outer wall of the side of the inlet and outlet 29 is provided with a buckle groove 291. The inner wall of the inlet and outlet 29 is slidably connected to a sealing plug 292.

[0027] The grooves 291 are set on both sides of the sealing plug 292, and the adsorbent frame 27 is set laterally along the inner wall of the lower semi-arc tube 21 and the upper semi-arc tube 22, which can guide the gas flow, prolong the contact time with the adsorbent, and improve the adsorption efficiency.

[0028] The connecting flange 23 is fixedly connected to the interface flange 3 by bolts. The connecting flange 23 on the side of the lower semi-arc tube 21 away from the interface flange 3 is fixedly connected to the explosion-proof cover 4 by bolts. The explosion-proof cover 4 is made of a combination of aluminum foil and aramid fiber. The inner aluminum foil ensures airtightness and precise explosion, while the outer aramid fiber enhances tear resistance and prevents fragments from falling off after explosion. Its fatigue life is higher than that of pure metal, making it suitable for current transformers with frequent internal pressure fluctuations.

[0029] In use, the interface flange 3 on the inner wall of the side of the current transformer 1 is fixed to the connecting flange 23 of the adsorption structure 2 by bolts, so that the adsorption structure 2 and the inner cavity of the current transformer 1 form a communication channel. The side of the adsorption structure 2 away from the interface flange 3 is bolted to the explosion-proof cover 4 through another set of connecting flanges 23, thus forming a closed cavity of the current transformer 1, the adsorption structure 2, and the explosion-proof cover 4, ensuring that the gas only flows through the inside of the adsorption structure 2.

[0030] The lower half-arc tube 21 of the adsorption structure 2 is symmetrically fixed with sealing gaskets 26 on its outer wall. When the upper half-arc tube 22 is closed around the rotation axis, its inner wall is in close contact with the sealing gasket 26. It is tightened with the bolt in the connection hole 25 to achieve the sealing at the joint of the arc tube and prevent gas leakage. The inlet and outlet 29 of the adsorbent frame 27 are sealed by the sealing plug 292 to prevent the adsorbent from overflowing from the frame.

[0031] The insulating oil vapors and moisture inside the current transformer 1 enter the cavity formed by the lower half-arc tube 21 and the upper half-arc tube 22 of the adsorption structure 2 through the interface flange 3. Then, they pass through the mesh 28 on both sides of the adsorbent frame 27 and come into full contact with the adsorbent inside the frame. The function of the mesh 28 is to allow the gas to pass freely while blocking the adsorbent particles from entering the internal or external environment of the current transformer 1. The tubular channel formed by the lower half-arc tube 21 and the upper half-arc tube 22, and the adsorbent frame 27 being arranged laterally along the inner wall of the lower half-arc tube 21 and the upper half-arc tube 22, can guide the gas flow, prolong the contact time with the adsorbent, and improve the adsorption efficiency.

[0032] When the adsorbent fails, the bolts in the connecting hole 25 can be loosened to open the upper semi-arc tube 22, exposing the adsorbent frame 27 in the slot 24. The adsorbent frame 27 can be slid out along the slot 24, and the sealing plug 292 can be opened through the buckle 291. The adsorbent can be replaced from the inlet / outlet 29. The sealing plug 292 and the adsorbent frame 27 can be reset, the upper semi-arc tube 22 can be closed, and the bolts can be tightened to complete the maintenance. This design does not require disassembling the entire adsorption structure 2, which greatly simplifies the maintenance process.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cover plate for an adsorber used in a current transformer, characterized in that, include: The current transformer (1) has an interface flange (3) fixedly connected to the inner wall of its side, and an adsorption structure (2) fixedly connected to the outer wall of the interface flange (3). An explosion-proof cover (4) is fixedly connected to the outer wall of the adsorption structure (2) on the side away from the interface flange (3). The adsorption structure (2) includes a lower semi-arc tube (21), an upper semi-arc tube (22) is rotatably connected to the outer wall of the top of the lower semi-arc tube (21), a connecting flange (23) is fixedly connected to the outer wall of the side of the lower semi-arc tube (21), a slot (24) is opened on the inner wall of the lower semi-arc tube (21) and the upper semi-arc tube (22), a connecting hole (25) is opened on the outer wall of the lower semi-arc tube (21) and the upper semi-arc tube (22), and a sealing gasket (26) is symmetrically fixedly connected to the outer wall of the lower semi-arc tube (21).

2. The absorber cover plate for a current transformer according to claim 1, characterized in that: The slot (24) is arranged laterally along the inner wall of the lower semi-arc tube (21) and the upper semi-arc tube (22). The connecting hole (25) is arranged laterally along the outer wall of the lower semi-arc tube (21) and the upper semi-arc tube (22). The inner wall of the upper semi-arc tube (22) is in contact with the outer wall of the sealing gasket (26). The lower semi-arc tube (21) and the upper semi-arc tube (22) are fixedly connected by bolts passing through the connecting hole (25).

3. The absorber cover plate for a current transformer according to claim 1, characterized in that: The inner wall of the slot (24) is slidably connected to an adsorbent frame (27), and the inner wall of the side of the adsorbent frame (27) is symmetrically fixedly connected to a mesh (28). The outer wall of the top of the adsorbent frame (27) is provided with an inlet and outlet (29), and the outer wall of the side of the inlet and outlet (29) is provided with a buckle groove (291). The inner wall of the inlet and outlet (29) is slidably connected to a sealing plug (292).

4. The absorber cover plate for a current transformer according to claim 3, characterized in that: The groove (291) is provided on both sides of the sealing plug (292), and the adsorbent frame (27) is arranged horizontally along the inner wall of the lower semi-arc tube (21) and the upper semi-arc tube (22).

5. The absorber cover plate for a current transformer according to claim 1, characterized in that: The connecting flange (23) is fixedly connected to the interface flange (3) by bolts, and the connecting flange (23) on the side of the lower semi-arc tube (21) away from the interface flange (3) is fixedly connected to the explosion-proof cover (4) by bolts.

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