Protective cover for main transformer of electric locomotive

Abstract

The utility model discloses electric locomotive main change installation protective cover relates to electric locomotive protection field, include: the first casing and second casing of spliced composition, the top of first casing and second casing is provided with first gasket and second gasket, and the top of first casing and second casing forms main circuit breaker mounting hole and insulator mounting hole through two groups of semicircle of different radius, the top of first casing and second casing is provided with two groups of heat dissipation components for absorbing and dispersing the heat generated in the work of circuit breaker and insulator, and the side of first casing is provided with lightning arrester wiring hole, and the side of first casing and second casing is provided with ground wire lead hole. The utility model discloses through setting heat dissipation component, can solve the heat accumulation problem of circuit breaker and insulator in the long -term operation or frequent breaking process, avoids the switch misoperation or protection false triggering because of local overheating.

Description

Technical Field

[0001] This utility model relates to the field of electric locomotive protection, specifically to a protective cover for the main transformer of an electric locomotive. Background Technology

[0002] Electric locomotives are locomotives that use electricity as their driving energy to pull trains. They are a type of traction equipment in modern railway transportation that is highly efficient, low-pollution, and technologically advanced. Electric locomotive circuit breakers are key electrical protection devices used in the high-voltage power supply system of electric locomotives. Their main task is to provide safety protection and control for the locomotive's traction power supply system.

[0003] Electric locomotives operate under high voltage and high current conditions, and circuit breakers are important devices in their main circuits for control and protection. Once they are subjected to external mechanical impact, dust intrusion, moisture erosion or conductive particle contamination, it may lead to a decrease in insulation performance, arcing, malfunction or direct breakdown. Therefore, setting up physical protection structures for circuit breakers can effectively isolate external environmental interference and ensure their electrical safety operation.

[0004] However, existing electric locomotive circuit breaker protective covers often focus on electrical safety, mechanical shock protection, and insulation isolation. Electric locomotive circuit breakers operate frequently under high voltage and high current conditions, generating a large amount of heat. If the protective cover lacks internal active or passive heat dissipation channels, the internal temperature will continue to rise, forming a heat island effect. This will cause the components to operate in a high-temperature environment, which can easily lead to switch malfunctions or protection malfunctions due to local overheating.

[0005] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0006] In response to the problems in related technologies, this utility model proposes a protective cover for the main transformer of electric locomotives to overcome the aforementioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows: The main transformer of the electric locomotive is equipped with a protective cover, including: The first and second shells are assembled from parts; The top ends of the first housing and the second housing are provided with a first sealing gasket and a second sealing gasket; Furthermore, the tops of the first and second housings are connected by two sets of semicircles with different radii to form the main circuit breaker mounting holes and the insulator mounting holes; The top of the first housing and the second housing are provided with two sets of heat dissipation components to absorb and disperse the heat generated by the circuit breaker and insulator during operation. A surge arrester wiring hole is provided on one side of the first housing, and a grounding wire lead hole is provided on one side of both the first and second housings.

[0008] Furthermore, to ensure that the protective layer and sponge layer not only effectively resist physical damage or erosion from the external environment, but also provide effective buffering during the installation, vibration, or displacement of the circuit breaker or insulator, preventing direct contact with the first and second housings that could lead to scratches, wear, or structural damage, and enabling the entire protective cover to achieve internal and external buffering, flexible fit, and impact resistance, thereby comprehensively ensuring the operational safety of the circuit breaker and the long-term reliability of the protective cover, several sets of positioning bolt holes are provided at the top of the first and second housings; the interior of the positioning bolt holes is equipped with a fixed... The positioning bolt sealing cover has a lifting hole on one side of the positioning bolt insertion hole; the first housing and the second housing are composed of an abutment layer, a protective layer and a sponge layer, with the protective layer and the sponge layer respectively installed on both sides of the abutment layer; the abutment layer is used to connect the protective layer and the sponge layer; the protective layer is used to improve the protective performance of the surfaces of the first housing and the second housing; the sponge layer is used to protect the first housing and the second housing and prevent the main circuit breaker and insulator from scratching the first housing and the second housing; both the first housing and the second housing have L-shaped grooves at their bottom ends, and the bottom end of the first housing, located on the side of the surge arrester wiring hole, has a through groove.

[0009] Furthermore, in order to ensure the sealing and stability of the main circuit breaker and insulator during installation and use, the first sealing gasket includes a first semi-circular structure installed at the top of the first housing, a second semi-circular structure provided on one side of the first semi-circular structure, and the second semi-circular structure installed at the top of the second housing; the first sealing gasket and the second sealing gasket have the same structure, and the diameter of the first sealing gasket is larger than the diameter of the second sealing gasket.

[0010] Furthermore, in order to use a power pump as the driving core, the cooling medium is guided to the heat dissipation heat dissipation plate of the first and second housings through the connected medium inlet and medium outlet. A closed circulation flow is formed in the flow channel, so that the heat in the heat dissipation heat dissipation heat dissipation plate is quickly conducted and discharged, which significantly improves the heat dissipation response speed. This can solve the problem of heat accumulation in circuit breakers and insulators during long-term operation or frequent switching, and avoid switch malfunction or protection false triggering due to local overheating. The heat dissipation component includes a power pump installed at the top of the first and second housings. A medium inlet and a medium outlet are provided on one side of the power pump. The bottom of the medium inlet and the medium outlet are connected to the heat dissipation heat dissipation plate installed at the bottom of the first and second housings. A flow channel is opened at the top of the heat dissipation heat dissipation plate, and the two ends of the flow channel are connected to the medium inlet and the medium outlet, respectively.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model has a simple structure and can completely seal and protect the outer surface of the main circuit breaker base, thus ensuring the cleanliness of the main circuit breaker surface for a longer period of time. This reduces the probability of short circuits caused by the accumulation of dirt on the outer surface of the main circuit breaker base, thereby indirectly improving the overall insulation performance of the main circuit breaker. At the same time, the protective cover is installed between the main circuit breaker insulator and the main circuit breaker base, increasing the creepage distance between the main circuit breaker insulator and the main circuit breaker base, thereby enhancing the overall insulation performance of the main circuit breaker.

[0012] 2. With the help of the protective layer and the sponge layer, this utility model can not only effectively resist physical damage or erosion from the external environment, but also provide effective buffering during the installation, vibration or displacement of the circuit breaker or insulator, preventing it from directly contacting the first and second shells and causing scratches, wear or structural damage. This allows the entire protective cover to achieve the purpose of internal and external buffering, flexible fit and impact resistance, thereby comprehensively ensuring the safety of the circuit breaker operation and the long-term reliability of the protective cover.

[0013] 3. This utility model, by setting up a heat dissipation component and using a power pump as the driving core, guides the cooling medium to the heat dissipation heat dissipation heat dissipation plate of the first shell and the second shell through the connected medium inlet and medium outlet. The heat is quickly conducted and discharged from the heat dissipation heat dissipation heat dissipation plate by forming a closed circulation flow in the flow channel, which significantly improves the heat dissipation response speed. It can solve the problem of heat accumulation in circuit breakers and insulators during long-term operation or frequent switching, and avoid switch malfunction or protection false triggering due to local overheating. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the protective cover for the main transformer of an electric locomotive according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of the protective cover for the main transformer of an electric locomotive, according to an embodiment of the present utility model, from another angle. Figure 3 This is a planar sectional view of the first housing in the protective cover for the main transformer of an electric locomotive according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the heat dissipation assembly in the protective cover for the main transformer of an electric locomotive according to an embodiment of the present utility model; Figure 5This is a schematic diagram of the structure of the first sealing gasket in the protective cover for the main transformer of an electric locomotive according to an embodiment of the present utility model.

[0016] In the picture: 1. First housing; 2. Second housing; 3. First sealing gasket; 301. First semi-circular structure; 302. Second semi-circular structure; 4. Second sealing gasket; 5. Main circuit breaker mounting hole; 6. Insulator mounting hole; 7. Heat dissipation assembly; 701. Power pump; 702. Medium inlet; 703. Medium outlet; 704. Heat dissipation heat spreader; 705. Flow channel; 8. Surge arrester wiring hole; 9. Grounding wire lead hole; 10. Positioning bolt insertion hole; 11. Positioning bolt sealing cover; 12. Lifting hole; 13. Abutment layer; 14. Protective layer; 15. Sponge layer; 16. L-shaped groove; 17. Through groove. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0018] According to an embodiment of the present invention, a protective cover for the main transformer of an electric locomotive is provided.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-5 As shown, the first housing 1 and the second housing 2 are assembled from the main transformer installation protective cover of the electric locomotive according to an embodiment of the present utility model. The top ends of the first housing 1 and the second housing 2 are provided with a first sealing gasket 3 and a second sealing gasket 4; Furthermore, the tops of the first housing 1 and the second housing 2 are connected by two sets of semicircles with different radii to form the main circuit breaker mounting hole 5 and the insulator mounting hole 6; The top of the first housing 1 and the second housing 2 are provided with two sets of heat dissipation components 7, which are used to absorb and disperse the heat generated by the circuit breaker and insulator during operation. A surge arrester wiring hole 8 is provided on one side of the first housing 1, and a grounding wire lead hole 9 is provided on one side of both the first housing 1 and the second housing 2.

[0020] By utilizing the above technical solution, the protective cover proposed in this utility model can completely seal and protect the outer surface of the main circuit breaker base, thereby ensuring the cleanliness of the main circuit breaker surface for a longer period of time. This reduces the probability of short circuits caused by the accumulation of dirt on the outer surface of the main circuit breaker base, indirectly improving the overall insulation performance of the main circuit breaker. At the same time, the protective cover is installed between the main circuit breaker insulator and the main circuit breaker base, increasing the creepage distance between the main circuit breaker insulator and the main circuit breaker base, thus enhancing the overall insulation performance of the main circuit breaker.

[0021] In one embodiment, for the first housing 1, several sets of positioning bolt holes 10 are provided at the top of the first housing 1 and the second housing 2; a positioning bolt sealing cover 11 is provided inside the positioning bolt hole 10, and a lifting hole 12 is provided on one side of the positioning bolt hole 10; the first housing 1 and the second housing 2 are composed of an abutment layer 13, a protective layer 14, and a sponge layer 15, with the protective layer 14 and the sponge layer 15 respectively installed on both sides of the abutment layer 13; the abutment layer 13 is used to connect the protective layer 14 and the sponge layer 15; the protective layer 14 is used to improve the protective performance of the surfaces of the first housing 1 and the second housing 2; the sponge layer 15 is used to protect the first housing 1 and the second housing 2 to prevent main circuit breakage. The circuit breaker and insulator scratch the first housing 1 and the second housing 2. The bottom of the first housing 1 and the second housing 2 are both provided with L-shaped grooves 16. The bottom of the first housing 1 and the side of the surge arrester wiring hole 8 are provided with through grooves 17. Thus, under the action of the protective layer 14 and the sponge layer 15, it can not only effectively resist the physical damage or erosion of the external environment, but also provide effective buffering during the installation, vibration or displacement of the circuit breaker or insulator, preventing it from directly contacting the first housing 1 and the second housing 2 and causing scratches, wear or structural damage. This makes the entire protective cover achieve the purpose of internal and external buffering, flexible fit and impact resistance, thereby comprehensively ensuring the safety of the circuit breaker operation and the long-term reliability of the protective cover.

[0022] It should be explained that the first shell 1 and the second shell 2 are composed of three parts: an abutment layer 13, a protective layer 14, and a sponge layer 15. Each layer has a clear functional division and collaborative relationship, jointly enhancing the overall protective capability of the shield. The abutment layer 13, as the core connecting layer, plays a role in structural integration and interlayer positioning, ensuring that the protective layer 14 and the sponge layer 15 are stably bonded together to form a stable sandwich structure. The protective layer 14, located outside the abutment layer 13, is the outermost exposed surface, primarily responsible for improving the physical protective performance of the shield's surface, possessing properties such as impact resistance, wear resistance, and corrosion resistance. It effectively resists physical damage or erosion from external environmental pollutants; while the sponge layer 15 is installed on the inner side of the contact layer, close to the direction of the circuit breaker, and has soft buffering characteristics. It can provide effective buffering during the installation, vibration or displacement of the circuit breaker or insulator, preventing it from directly contacting the first housing 1 and the second housing 2, which could lead to scratches, wear or structural damage. The three-layer structure works together to make the entire protective cover not only have good mechanical strength and environmental adaptability, but also have internal and external buffering, flexible fit and impact resistance, thereby comprehensively ensuring the safety of circuit breaker operation and the long-term reliability of the protective cover.

[0023] It should be noted that the protective layer 14 is composed of multiple protective films. The protective films are thin films. After one use, the outermost film along with the contaminants can be peeled off and discarded, leaving a clean protective film.

[0024] In one embodiment, the first sealing gasket 3 includes a first semi-circular structure 301 installed on the top of the first housing 1, a second semi-circular structure 302 provided on one side of the first semi-circular structure 301, and the second semi-circular structure 302 installed on the top of the second housing 2; the first sealing gasket 3 and the second sealing gasket 4 have the same structure, but the diameter of the first sealing gasket 3 is larger than the diameter of the second sealing gasket 4, thereby ensuring the sealing and stability of the main circuit breaker and insulator during installation and use.

[0025] It should be explained that the joint between the first semicircular structure 301 and the second semicircular structure 302 is treated with insulating sealant, such as silicone rubber insulating sealant, to form a complete local seal. The lower end of the ring covers the outer surface of the horizontal plane at the root of the main circuit breaker, and the inner walls of the first semicircular structure 301 and the second semicircular structure 302 are in contact with the outer surface of the bottom of the main circuit breaker.

[0026] In one embodiment, the heat dissipation assembly 7 includes a power pump 701 installed at the top of the first housing 1 and the second housing 2. A medium inlet 702 and a medium outlet 703 are provided on one side of the power pump 701. The bottom ends of the medium inlet 702 and the medium outlet 703 are connected to a heat dissipation heat spreader 704 installed at the bottom of the first housing 1 and the second housing 2. A flow channel 705 is provided at the top of the heat dissipation heat spreader 704, and both ends of the flow channel 705 are connected to the medium inlet 702 and the medium outlet 703, respectively. Thus, with the power pump 701 as the driving core, the cooling medium is guided to the heat dissipation heat spreader 704 of the first housing 1 and the second housing 2 through the connected medium inlet 702 and the medium outlet 703. A closed-loop flow is formed in the flow channel 705, allowing heat to be quickly conducted and discharged from the heat dissipation heat spreader 704, significantly improving the heat dissipation response speed. This can solve the problem of heat accumulation in circuit breakers and insulators during long-term operation or frequent switching, and avoid malfunctions of switches or protection systems due to localized overheating.

[0027] It should be explained that the flow channel 705 is a slow-flow zone where the cooling medium flows slowly in the area away from the heat source, i.e., the area near the circuit breaker and insulator. The slow-flow zone is used for rapid heat dissipation. The flow channel 705 is a fast-flow zone where the cooling medium flows quickly in the area near the heat source, i.e., the area near the circuit breaker and insulator. The fast-flow zone is used to quickly absorb and carry away heat. There are several ways to control the flow rate of the coolant in the flow channel 705. The width or depth of the flow channel 705 can be changed, as long as the cross-sectional area of ​​the flow channel 705 in the slow-flow zone is greater than the cross-sectional area in the fast-flow zone.

[0028] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0029] In practical applications, the first housing 1 and the second housing 2 are transported to the top of the electric locomotive through the lifting hole 12. The first housing 1 and the second housing 2 are connected to the top of the electric locomotive using positioning bolts at the positioning bolt insertion hole 10. After the positioning bolts are installed, the positioning bolt sealing cover 11 is installed to prevent dust from entering. The main circuit breaker and insulator are installed through the main circuit breaker mounting hole 5 and the insulator mounting hole 6. At the same time, the installation sealing of the main circuit breaker and insulator is ensured by the action of the first sealing gasket 3 and the second sealing gasket 4. The wiring is carried out through the surge arrester wiring hole 8 and the grounding wire lead hole 9.

[0030] During the use of the protective cover, the contact layer 13, the protective layer 14 and the sponge layer 15 can prevent it from directly contacting the first housing 1 and the second housing 2, which could cause scratches, wear or structural damage. The three-layer structure works together to give the entire protective cover good mechanical strength and environmental adaptability. At the same time, the heat dissipation component 7 can solve the problem of heat accumulation in the circuit breaker and insulator during long-term operation or frequent switching, and avoid the switch malfunction or protection malfunction caused by local overheating.

[0031] In summary, with the help of the above-mentioned technical solution of this utility model, the structure of this utility model is simple, and it can completely seal and protect the outer surface of the main circuit breaker base, thus ensuring the cleanliness of the main circuit breaker surface for a longer period of time. This reduces the probability of discharge short circuits caused by the accumulation of dirt on the outer surface of the main circuit breaker base, thereby indirectly improving the overall insulation performance of the main circuit breaker. At the same time, the protective cover is installed between the main circuit breaker insulator and the main circuit breaker base, increasing the creepage distance between the main circuit breaker insulator and the main circuit breaker base, thereby enhancing the overall insulation performance of the main circuit breaker. Under the action of the protective layer 14 and the sponge layer 15, this utility model can not only effectively resist physical damage or pollutant corrosion from the external environment, but also provide effective buffering during the installation, vibration or displacement of the circuit breaker or insulator, preventing direct contact with the first housing 1 and the second housing 2, which could lead to scratches, wear or structural damage. This allows the entire protective cover to achieve the purpose of internal and external buffering, flexible fit and impact resistance, thereby comprehensively ensuring the safety of circuit breaker operation and the long-term reliability of the protective cover. This invention, by setting up a heat dissipation component 7, with a power pump 701 as the driving core, guides the cooling medium to the heat dissipation heat dissipation plate 704 of the first housing 1 and the second housing 2 through the connected medium inlet 702 and medium outlet 703. The medium forms a closed circulation flow in the flow channel 705, so that the heat in the heat dissipation heat dissipation plate 704 is quickly conducted and discharged, which significantly improves the heat dissipation response speed. It can solve the problem of heat accumulation in circuit breakers and insulators during long-term operation or frequent switching, and avoid switch malfunction or protection false triggering due to local overheating.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective cover for the main transformer of an electric locomotive, characterized in that, include: The first shell (1) and the second shell (2) are assembled together. The top ends of the first housing (1) and the second housing (2) are provided with a first sealing gasket (3) and a second sealing gasket (4). Furthermore, the top ends of the first housing (1) and the second housing (2) are connected by two sets of semicircles with different radii to form the main circuit breaker mounting hole (5) and the insulator mounting hole (6). The top of the first housing (1) and the second housing (2) are provided with two sets of heat dissipation components (7) to absorb and disperse the heat generated by the circuit breaker and insulator during operation; A surge arrester wiring hole (8) is provided on one side of the first housing (1), and a grounding wire lead hole (9) is provided on one side of the first housing (1) and the second housing (2). The first housing (1) and the second housing (2) are composed of an abutment layer (13), a protective layer (14) and a sponge layer (15), wherein the protective layer (14) and the sponge layer (15) are respectively installed on both sides of the abutment layer (13); The abutment layer (13) is used to connect the protective layer (14) and the sponge layer (15). The protective layer (14) is used to improve the protective performance of the surfaces of the first housing (1) and the second housing (2); The sponge layer (15) is used to protect the first housing (1) and the second housing (2) to prevent the main circuit breaker from scratching the first housing (1) and the second housing (2). The heat dissipation assembly (7) includes a power pump (701) installed at the top of the first housing (1) and the second housing (2). A medium inlet (702) and a medium outlet (703) are provided on one side of the power pump (701). The bottom ends of the medium inlet (702) and the medium outlet (703) are connected to a heat dissipation heat spreader (704) installed at the bottom of the first housing (1) and the second housing (2). The top of the heat dissipation heat dissipation plate (704) is provided with a flow channel (705), and the two ends of the flow channel (705) are respectively connected to the medium inlet (702) and the medium outlet (703).

2. The protective cover for the main transformer installation of electric locomotives according to claim 1, characterized in that, The top ends of the first housing (1) and the second housing (2) are provided with a number of positioning bolt holes (10). The positioning bolt insertion hole (10) is provided with a positioning bolt sealing cover (11) inside, and a lifting hole (12) is provided on one side of the positioning bolt insertion hole (10).

3. The protective cover for the main transformer installation of electric locomotives according to claim 1, characterized in that, Both the first housing (1) and the second housing (2) have L-shaped grooves (16) at their bottom ends, and the first housing (1) has a through groove (17) at its bottom end and on one side of the surge arrester wiring hole (8).

4. The protective cover for the main transformer installation of electric locomotives according to claim 1, characterized in that, The first sealing gasket (3) includes a first semi-circular structure (301) installed on the top of the first housing (1), a second semi-circular structure (302) is provided on one side of the first semi-circular structure (301), and the second semi-circular structure (302) is installed on the top of the second housing (2); The first sealing gasket (3) has the same structure as the second sealing gasket (4), and the diameter of the first sealing gasket (3) is larger than the diameter of the second sealing gasket (4).

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