Explosion-proof oil-immersed current transformer

Abstract

The utility model discloses an explosion-proof oil-immersed current transformer, which belongs to the technical field of oil-immersed current transformers and comprises an insulating porcelain bushing, a flange A is mounted at the bottom end of the insulating porcelain bushing, an expander is mounted at the top end of the insulating porcelain bushing, an oil tank is mounted at the bottom of the flange A, a flange B is mounted at the top of the oil tank, and the flange B is mounted at the bottom of the oil tank. And two sides of the outer wall of the flange B and two sides of the outer wall of the flange A are respectively provided with an annular sealing element. The structure is reasonable, through the arrangement of the annular sealing elements and the protective coating mechanism, the flange B on the oil tank is assembled on the flange A below an insulating porcelain bushing on the oil-immersed current transformer, and the oil-immersed current transformer is assembled on the oil tank through the annular sealing elements; and the annular sealing element is matched with the sealing ring A and the sealing ring B to seal the flange A and the flange B, so that leakage at the mounting position of the oil tank and the insulating porcelain bushing after mounting is avoided as much as possible, the sealing aspect is guaranteed, and the possibility that the oil-immersed current transformer is easy to explode is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed current transformers, in particular to an explosion-proof oil-immersed current transformer. Background Art

[0002] An oil-immersed current transformer is a device used to measure current and is commonly used in power systems. It measures and transforms current by passing the conductor that measures the current through the core of the transformer, using the principle of electromagnetic induction. This type of current transformer is insulated and cooled by immersing it in insulating oil. Oil-immersed current transformers are commonly used in low-voltage power systems to measure large currents, such as in substations, power plants, and industrial electricity. Its advantages include a wide measurement range, high accuracy, and good insulation performance. However, it should be noted that the oil-immersed current transformer needs to regularly check the state of the insulating oil and the insulation performance to ensure its safe and reliable operation. However, during the use of the oil-immersed current transformer, explosion-proof measures are particularly important. Leakage of the insulating oil in the oil-immersed current transformer or external damage will lead to the formation of an oil-gas mixture, which may cause an explosion. The overall sealing part of the oil-immersed current transformer is affected by the outdoor environment for a long time and is prone to damage or defects. It is also easy for external gas or liquid to enter the interior of the oil-immersed current transformer, thereby causing an explosion. The overall protection effect of the oil-immersed current transformer is poor, which directly affects the explosion-proof effect of the oil-immersed current transformer.

[0003] Therefore, it is necessary to develop an explosion-proof oil-immersed current transformer. Utility Model Content

[0004] The utility model aims to provide an explosion-proof oil-immersed current transformer. By providing an annular seal and a protective coating mechanism, the flange B on the oil tank is assembled at the flange A below the insulating porcelain sleeve on the oil-immersed current transformer. The annular seal is matched with a sealing ring A and a sealing ring B to seal the flange A and the flange B, so as to avoid leakage at the installation position of the oil tank and the insulating porcelain sleeve after installation. The sealing aspect is guaranteed, and the possibility of explosion of the oil-immersed current transformer is effectively reduced. The protective coating mechanism adopts a multi-layer protective coating, and is sprayed on the oil-immersed On the overall metal surface of the oil-immersed current transformer, on the one hand, the overall surface strength of the oil-immersed current transformer is enhanced to avoid severe wear caused by friction as much as possible. On the other hand, the overall surface of the oil-immersed current transformer is treated with anti-corrosion and antibacterial treatment to avoid corrosion and bacteria caused by moisture or water stains and damage. The use effect and durability of the oil-immersed current transformer are effectively improved, and the safety of the oil-immersed current transformer is directly guaranteed to solve the problem of poor effect and easy explosion of the oil-immersed current transformer proposed in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: an explosion-proof oil-immersed current transformer, comprising an insulating porcelain sleeve, a flange A is installed at the bottom end of the insulating porcelain sleeve, an expander is installed at the top end of the insulating porcelain sleeve, an oil tank is installed at the bottom of the flange A, and a flange B is installed at the top of the oil tank;

[0006] Annular seals are installed on both sides of the outer walls of the flange B and the flange A, and protective coating mechanisms are provided on the annular seals, the expander and the outer walls of the oil tank.

[0007] Preferably, an inner box is installed at the inner center of the oil tank, an explosion-proof sandwich panel is installed between the inner box and the opposite side of the oil tank, and bases are installed on both side outer walls of the oil tank.

[0008] Preferably, a sealing ring A is installed at the inner center of the annular sealing member, and the sealing ring A is located between the flange A and the flange B on opposite sides.

[0009] Preferably, a sealing ring B is installed on the inner wall of the annular sealing member, and the inner wall of the sealing ring B is slidably connected to the outer walls of flange A and flange B.

[0010] Preferably, the protective coating mechanism comprises a carbon fiber composite coating, and the carbon fiber composite coating is provided with a polysiloxane resin coating, a polyurethane waterproof coating and a nano zinc oxide coating in sequence from the outside to the inside.

[0011] Preferably, the thickness of the carbon fiber composite coating, the polysiloxane resin coating, the polyurethane waterproof coating and the nano zinc oxide coating is set to 3 mm-6 mm.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By providing an annular seal and a protective coating mechanism, flange B on the oil tank is assembled to flange A below the insulating porcelain sleeve on the oil-immersed current transformer, and then the annular seal is used in conjunction with sealing rings A and B to seal flanges A and B, so as to avoid leakage at the installation location of the oil tank and the insulating porcelain sleeve after installation, ensure sealing, and effectively reduce the possibility of explosion of the oil-immersed current transformer.

[0014] By adopting a multi-layer protective coating structure and spraying it on the overall metal surface of the oil-immersed current transformer in sequence, on the one hand, the overall surface strength of the oil-immersed current transformer is enhanced to avoid severe wear caused by friction as much as possible. On the other hand, the overall surface of the oil-immersed current transformer is treated with anti-corrosion and antibacterial treatment to avoid corrosion and bacteria caused by moisture or water stains and damage. The use effect and durability of the oil-immersed current transformer are effectively improved, and the safety of the oil-immersed current transformer is directly guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front cross-sectional view provided for the utility model;

[0016] Figure 2 A front view provided for the utility model;

[0017] Figure 3 The utility model provides Figure 1 A magnified view of the structure at A;

[0018] Figure 4 This is an enlarged schematic diagram of the local structure of the protective coating mechanism provided by the utility model.

[0019] In the figure: 1. Insulating porcelain sleeve; 101. Flange A; 102. Expander; 2. Oil tank; 201. Flange B; 202. Inner box; 203. Explosion-proof sandwich panel; 204. Base; 3. Annular seal; 301. Sealing ring A; 302. Sealing ring B; 4. Protective coating mechanism; 401. Carbon fiber composite coating; 402. Polysiloxane resin coating; 403. Polyurethane waterproof coating; 404. Nano zinc oxide coating. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides the following technical solutions: an explosion-proof oil-immersed current transformer, which can effectively improve the explosion-proof effect and durability of the oil-immersed current transformer during use. Figure 1-4, including an insulating porcelain sleeve 1, a flange A101 is installed at the bottom end of the insulating porcelain sleeve 1, an expander 102 is installed at the top of the insulating porcelain sleeve 1, an oil tank 2 is installed at the bottom of the flange A101, a flange B201 is installed on the top of the oil tank 2, an inner box 202 is installed at the inner center of the oil tank 2, an explosion-proof sandwich plate 203 is installed between the inner box 202 and the opposite side of the oil tank 2, and bases 204 are installed on both sides of the outer wall of the oil tank 2. The flange B201 on the oil tank 2 is assembled at the flange A101 below the insulating porcelain sleeve 1 on the oil-immersed current transformer, and then the annular seal 3 is matched with the sealing ring A301 and the sealing ring B302 adopts sealing treatment on flange A101 and flange B201 to avoid leakage at the installation position of the oil tank 2 and the insulating porcelain sleeve 1 after installation as much as possible, and at the same time, the sealing is guaranteed, effectively reducing the possibility of explosion of the oil-immersed current transformer. By arranging the inner box 202 inside the oil tank 2 and installing the explosion-proof sandwich plate 203 at the interlayer between the inner box 202 and the oil tank 2, when the inner box 202 is subjected to excessive pressure and cracks appear, leakage will not occur. At the same time, the explosion-proof sandwich plate 203 restricts the inner box 202, and also minimizes the possibility of explosion of the inner box 202;

[0022] Annular seals 3 are installed on both sides of the outer walls of flange B201 and flange A101, and a sealing ring A301 is installed at the inner center of the annular seal 3. The sealing ring A301 is located between the opposite sides of flange A101 and flange B201. A sealing ring B302 is installed on the inner wall of the annular seal 3. The inner wall of the sealing ring B302 is slidably connected with the outer walls of flange A101 and flange B201. A protective coating mechanism 4 is provided on the outer walls of the annular seal 3, the expander 102 and the oil tank 2. The protective coating mechanism 4 includes a carbon fiber composite coating 401. The carbon fiber composite coating 401 is provided from the outside. A polysiloxane resin coating 402, a polyurethane waterproof coating 403 and a nano zinc oxide coating 404 are sequentially arranged inside, and the thickness of the carbon fiber composite coating 401, the polysiloxane resin coating 402, the polyurethane waterproof coating 403 and the nano zinc oxide coating 404 is set to 3mm-6mm, and the interval is 5mm. The protective coating mechanism 4 adopts a multi-layer protective coating and is sequentially sprayed on the overall metal surface of the oil-immersed current transformer, such as the expander 102, the oil tank 2, the annular seal 3 or other metal surfaces, and the carbon fiber composite coating 401 on the protective coating mechanism 4 is resistant to high temperature and wear. The metal surface of the oil-immersed current transformer is easily damaged by high temperature, friction and corrosion. The polysiloxane resin coating 402 has a good high hardness, which can enhance the hardness of the metal surface of the oil-immersed current transformer and avoid deformation during transportation or construction. The polyurethane waterproof coating 403 has high strength, large elongation, and good water resistance. The metal surface of the oil-immersed current transformer can be waterproofed to prevent the metal surface of the outdoor oil-immersed current transformer from being easily affected by moisture and corrosion. Nano zinc oxide coating 404 has antibacterial, anti-odor, mildew-proof and anti-oxidation effects. It can perform antibacterial and anti-oxidation treatment on the metal surface of the oil-immersed current transformer to prevent water stains or water vapor in daily environment from corroding and oxidizing the metal surface of the oil-immersed current transformer. On the one hand, it enhances the overall surface strength of the oil-immersed current transformer and avoids the occurrence of severe wear caused by friction. On the other hand, the overall surface of the oil-immersed current transformer is treated with anti-corrosion and antibacterial treatment to avoid the occurrence of damage caused by corrosion and bacteria caused by moisture, water vapor or water stains.

[0023] Working principle: When using the utility model, the flange B201 on the oil tank 2 is assembled to the flange A101 below the insulating porcelain sleeve 1 on the oil-immersed current transformer, and then the flange A101 and the flange B201 are sealed by the annular seal 3 with the sealing ring A301 and the sealing ring B302, so as to avoid leakage at the installation point of the oil tank 2 and the insulating porcelain sleeve 1 after installation. At the same time, the sealing is guaranteed, and the possibility of explosion of the oil-immersed current transformer is effectively reduced. By setting the inner box 202 inside the oil tank 2 and installing an explosion-proof The sandwich plate 203 prevents leakage when the inner box 202 is subjected to excessive pressure and cracks appear. At the same time, the explosion-proof sandwich plate 203 restricts the inner box 202 and minimizes the possibility of explosion of the inner box 202. The protective coating mechanism 4 adopts a multi-layer protective coating and is sequentially sprayed on the overall metal surface of the oil-immersed current transformer, such as the expander 102, the oil tank 2, the annular seal 3 or other metal surfaces. The carbon fiber composite coating 401 on the protective coating mechanism 4 is resistant to high temperature, friction and corrosion, so as to prevent the metal surface on the oil-immersed current transformer from being easily affected by high temperature, friction and corrosion. The polysiloxane resin coating 402 has a good high hardness effect, which can enhance the hardness of the metal surface on the oil-immersed current transformer and try to avoid deformation during transportation or construction. The polyurethane waterproof coating 403 has high strength, large elongation, and good water resistance. The metal surface on the oil-immersed current transformer can be waterproofed to prevent the metal surface on the outdoor oil-immersed current transformer from being easily affected by moisture and corroded. The nano zinc oxide coating 404 has the effects of antibacterial, anti-bacterial, deodorizing, mildew-proof and anti-oxidation, which can be used for the oil-immersed current transformer. The metal surface of the oil-immersed current transformer is treated with antibacterial and anti-oxidation treatment to prevent water stains or water vapor in daily environment from corroding and oxidizing the metal surface of the oil-immersed current transformer. On the one hand, the overall surface strength of the oil-immersed current transformer is enhanced to avoid severe wear caused by friction. On the other hand, the overall surface of the oil-immersed current transformer is treated with anti-corrosion and antibacterial treatment to avoid damage caused by corrosion and bacteria caused by humid water vapor or water stains. This effectively improves the use effect and durability of the oil-immersed current transformer and directly ensures the safety of the oil-immersed current transformer.

[0024] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An explosion-proof oil-immersed current transformer, comprising an insulating porcelain sleeve (1), a flange A (101) being mounted at the bottom end of the insulating porcelain sleeve (1), and an expander (102) being mounted at the top end of the insulating porcelain sleeve (1), characterized in that: An oil tank (2) is installed at the bottom of the flange A (101), and a flange B (201) is installed at the top of the oil tank (2); Annular seals (3) are installed on both sides of the outer walls of the flange B (201) and the flange A (101), and protective coating mechanisms (4) are provided on the outer walls of the annular seal (3), the expander (102) and the oil tank (2).

2. The explosion-proof oil-immersed current transformer according to claim 1, characterized in that: An inner box (202) is installed at the inner center of the oil tank (2), an explosion-proof sandwich plate (203) is installed between the inner box (202) and the opposite side of the oil tank (2), and bases (204) are installed on both side outer walls of the oil tank (2).

3. The explosion-proof oil-immersed current transformer according to claim 1, characterized in that: A sealing ring A (301) is installed at the inner center of the annular sealing member (3), and the sealing ring A (301) is located between the flange A (101) and the opposite side of the flange B (201).

4. The explosion-proof oil-immersed current transformer according to claim 1, characterized in that: A sealing ring B (302) is installed on the inner wall of the annular sealing member (3), and the inner wall of the sealing ring B (302) is slidably connected to the outer walls of the flange A (101) and the flange B (201).

5. The explosion-proof oil-immersed current transformer according to claim 1, characterized in that: The protective coating mechanism (4) comprises a carbon fiber composite coating (401), wherein the carbon fiber composite coating (401) is provided with a polysiloxane resin coating (402), a polyurethane waterproof coating (403) and a nano zinc oxide coating (404) in sequence from the outside to the inside.

6. The explosion-proof oil-immersed current transformer according to claim 5, characterized in that: The thickness of the carbon fiber composite coating (401), the polysiloxane resin coating (402), the polyurethane waterproof coating (403) and the nano zinc oxide coating (404) is set to 3 mm to 6 mm.

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