Large-current gas-insulated switchgear with good sealing and heat dissipation performance

Abstract

The utility model discloses a high-current gas-insulated switchgear with good sealing and heat dissipation, which comprises a cabinet body, a rectangular hole is arranged on one side surface of the cabinet body, a connecting bolt is fixed on the edge of the rectangular hole, a cover plate is connected onto the connecting bolt, a positioning screw rod is connected onto the surface of the cover plate, a lower heat dissipation assembly is sleeved on the positioning screw rod, and the lower heat dissipation assembly is sleeved on the upper heat dissipation assembly. The lower heat dissipation assembly comprises a bottom plate, heat dissipation fins are evenly formed on the bottom plate, round holes are formed in the bottom plate and matched with the positioning screws, grooves are formed in the heat dissipation fins and matched with the nuts, the grooves and the round holes are concentrically distributed, and the grooves and the round holes are matched with the nuts. According to the utility model, the cover plate is firstly fixed on the cabinet body, the surface of the cover plate is connected with the positioning screw rod, and the lower heat dissipation assembly is sleeved on the positioning screw rod, so that the bearing capacity of the cabinet body is enhanced by the cover plate, and the deformation of the cabinet body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-insulated switchgear, in particular to a large-current gas-insulated switchgear with good sealing and heat dissipation performance. Background Technique

[0002] The gas-insulated switchgear uses SF6, dry air, nitrogen, etc. as the insulating medium for the primary main circuit, and installs high-voltage components such as vacuum circuit breakers, three-position switches, and instrument transformers and the connecting conductors between them in respective functional gas-filled chambers (i.e., gas tanks). The gas-insulated switchgear has the characteristics of small equipment volume, compact structure, and the gas tank is enclosed and not easily affected by the external environment. However, at the same time, due to the airtightness of the gas tank, when the main circuit is energized, the heat generated by high-voltage components and conductors cannot be discharged in time, resulting in an increase in the internal temperature of the gas tank, which will have an adverse impact on the current-carrying capacity of the conductor and the service life of components.

[0003] In the existing gas-insulated switchgear, generally, the heat sink is directly fixed on the side of the gas-insulated switchgear through screws or fasteners. However, the heat sink is heavy and easily causes deformation of the side of the cabinet body. At the same time, the screws or fasteners are connected inside the cabinet body, and holes need to be opened on the cabinet body, which is prone to air leakage. Therefore, in order to ensure the sealing and heat dissipation performance of the cabinet body, this gas-insulated switchgear is provided. Content of the Utility Model

[0004] The purpose of the utility model is to provide a large-current gas-insulated switchgear with good sealing and heat dissipation performance. First, the cover plate is fixed on the cabinet body, the positioning screw is connected to the surface of the cover plate, and the lower heat dissipation component is sleeved on the positioning screw. The cover plate enhances the bearing capacity of the cabinet body and reduces the deformation of the cabinet body.

[0005] The utility model provides the following technical solution: a large-current gas-insulated switchgear with good sealing and heat dissipation performance, including a cabinet body. A rectangular hole is opened on one side surface of the cabinet body, a connecting bolt is fixed on the edge of the rectangular hole, a cover plate is connected to the connecting bolt, the cover plate and the cabinet body are sealed through a sealing ring, a positioning screw is connected to the surface of the cover plate, a lower heat dissipation component is sleeved on the positioning screw, and a nut is connected to the positioning screw to fix the lower heat dissipation component;

[0006] The lower heat dissipation component includes a bottom plate, heat sinks are uniformly formed on the bottom plate, a round hole is opened on the bottom plate, the round hole is matched with the positioning screw, a groove is opened on the heat sink, the groove is matched with the nut, and the groove and the round hole are concentrically distributed.

[0007] In order to further improve the heat dissipation capacity of the cabinet body, a positioning screw is connected to the cabinet body, an upper heat dissipation component is connected to the positioning screw, and the upper heat dissipation component is installed above the lower heat dissipation component.

[0008] For convenient wiring, busbar connection sleeves are fixed on both side end faces of the cabinet body, and a second copper bar is connected between the busbar connection sleeves.

[0009] To make the circuit meet the three-phase usage requirements of the electric cabinet, the number of the busbar connection sleeves on one side of the cabinet body is three, the busbar connection sleeves are evenly distributed up and down, and the number of the second copper bars is three.

[0010] According to the above technical solution, third copper bars are connected to both side faces of the second copper bar, a bracket is connected to the lower surface of the third copper bar, and a static contact is fixed on one side face of the third copper bar.

[0011] To ground the circuit in the cabinet body, three external taper sleeves are connected to the lower part of the side end face of the cabinet body, and first copper bars are connected to the ends of the external taper sleeves.

[0012] To prevent excessive air pressure in the cabinet body, two through holes are opened on the bottom of the cabinet body, and a pressure release disc is installed in the through holes.

[0013] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0014] (1) By first fixing the cover plate on the cabinet body, connecting positioning screws on the surface of the cover plate, and sleeving the lower heat dissipation component on the positioning screws, the cover plate enhances the bearing capacity of the cabinet body and reduces the deformation of the cabinet body caused by the weight of the heat dissipation component.

[0015] (2) Fixing the lower heat dissipation component on the surface of the cabinet body with nuts makes the installation of the lower heat dissipation component convenient. At the same time, installing the upper heat dissipation component on the cabinet body improves the heat dissipation performance of the side of the cabinet body. Description of the Drawings

[0016] The drawings are used to provide further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0018] Figure 2 is a three-dimensional view of one perspective of the overall structure of the present utility model;

[0019] Figure 3 is a three-dimensional view of another perspective of the overall structure of the present utility model;

[0020] Figure 4 is a front view of the present utility model;

[0021] Figure 5It is a schematic structural diagram of the heat dissipation component of the present utility model;

[0022] In the figure: 1, cabinet body; 2, outer conical sleeve; 3, first copper bar; 4, busbar connection sleeve; 5, second copper bar; 6, third copper bar; 7, static contact; 8, bracket; 9, connecting bolt; 10, upper heat dissipation component; 11, cover plate; 12, lower heat dissipation component; 121, bottom plate; 122, heat sink; 123, groove; 124, round hole; 13, pressure release disc; 14, positioning screw. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0024] Please refer to Figure 1 and 4 , the present utility model provides a technical solution: a large current gas-insulated switchgear with good sealing and heat dissipation, including a cabinet body 1 with a rated current of 2000A or 2500A inside. A rectangular hole is opened on one side of the cabinet body 1, and a connecting bolt 9 is fixed on the edge of the rectangular hole. The connecting bolt 9 is installed on the reinforcing rib on the back of the cabinet body 1 to ensure the bearing capacity. A cover plate 11 is connected to the connecting bolt 9. There is also a sealing ring between the cover plate 11 and the cabinet body 1 to ensure the sealing performance. The cover plate 11 is sleeved on the connecting bolt 9 and fixed to the cabinet body 1 through a nut. A positioning screw 14 is connected to the surface of the cover plate 11. A lower heat dissipation component 12 is sleeved on the positioning screw 14, and a nut is connected to the positioning screw 14 to fix the lower heat dissipation component 12, fixing the lower heat dissipation component 12 on the side of the cover plate 11, reducing the direct pressure on the cabinet body 1 and the deformation of the cabinet body 1, and at the same time improving the heat dissipation capacity of the cabinet body 1;

[0025] Such as Figure 5As shown in the figure, the lower heat dissipation component 12 includes a bottom plate 121, on which heat dissipation fins 122 are evenly formed. Through the heat dissipation fins 122, the air circulation is improved, enabling the lower heat dissipation component 12 to quickly dissipate heat from the surface of the cabinet body 1. A round hole 124 is formed on the bottom plate 121, and the round hole 124 cooperates with the positioning screw 14. The positioning screw 14 passes through the round hole 124 to connect the lower heat dissipation component 12 to the positioning screw 14. A groove 123 is formed on the heat dissipation fin 122, and the groove 123 cooperates with a nut. The groove 123 and the round hole 124 are concentrically distributed. Through the connection of the nut and the positioning screw 14, the nut presses the lower heat dissipation component 12 against the positioning screw 14, fixing the lower heat dissipation component 12 on the side of the cabinet body 1 and improving the heat dissipation capacity of the cabinet body 1.

[0026] A positioning screw 14 is connected to the cabinet body 1, and an upper heat dissipation component 10 is connected to the positioning screw 14. The upper heat dissipation component 10 is installed above the lower heat dissipation component 12, and the structure of the upper heat dissipation component 10 is the same as that of the lower heat dissipation component 12. By setting the upper heat dissipation component 10 and installing the upper heat dissipation component 10 on the lower heat dissipation component 12, the heat dissipation capacity of one side of the cabinet body 1 is further improved.

[0027] As Figure 1 and 2 shown in the figure, busbar connection sleeves 4 are fixed on both end faces of the cabinet body 1. A second copper bar 5 is connected between the busbar connection sleeves 4. The busbar connection sleeves 4 are inserted into the cabinet body 1, making the cable wiring more convenient and improving the safety of the second copper bar 5 at the same time.

[0028] As Figures 1 to 3 shown in the figure, the number of busbar connection sleeves 4 on one side of the cabinet body 1 is three, and the busbar connection sleeves 4 are evenly distributed up and down. The number of second copper bars 5 is three. The three second copper bars 5 and the three busbar connection sleeves 4 respectively correspond to the A, B, and C phases, meeting the electrical usage specifications and ensuring the safe use of the electric cabinet.

[0029] As Figure 2 shown in the figure, third copper bars 6 are connected to both side surfaces of the three second copper bars 5. A bracket 8 is connected to the lower surface of the third copper bar 6. The three brackets 8 are on the same plane. A static contact 7 is fixed on one side surface of the third copper bar 6, so that each phase of the circuit is connected with a third copper bar 6, and the static contacts 7 are also on the same plane, facilitating the connection of other components in the three-phase circuits and controlling the connection of the static contacts 7 to make the operation or maintenance more convenient.

[0030] As Figure 2 and 4As shown, three external tapered sleeves 2 are connected to the lower part of the side end face of the cabinet body 1, and a first copper bar 3 is connected to the end of each external tapered sleeve 2. Through the first copper bar 3, the internal three-phase circuit is connected to the external tapered sleeve 2 to achieve circuit grounding and ensure the safe insulation performance of the electric cabinet.

[0031] As Figure 1 and 4 shown, two through holes are opened in the bottom of the cabinet body 1, and a pressure relief disc 13 is installed in the through holes to prevent the gas pressure in the cabinet body 1 from being too high.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-current inflatable cabinet with good sealing and heat dissipation, comprising a cabinet body, a rectangular hole is opened on one side of the cabinet body, and the characteristics are: A connecting bolt is fixed on the edge of the rectangular hole, a cover plate is connected to the connecting bolt, the cover plate and the cabinet are sealed by a sealing ring, a positioning screw is connected to the surface of the cover plate, a lower heat dissipation component is sleeved on the positioning screw, and a nut is connected to the positioning screw to fix the lower heat dissipation component; The lower heat dissipation component includes a base plate, a heat sink is evenly formed on the base plate, a circular hole is opened on the base plate, the circular hole cooperates with the positioning screw, a groove is opened on the heat sink, the groove cooperates with the nut, and the groove and the circular hole are concentrically distributed.

2. A sealed and heat-dissipating high-current inflatable cabinet according to claim 1, characterized in that: The cabinet is connected with a positioning screw, the positioning screw is connected with an upper heat dissipation component, and the upper heat dissipation component is installed above the lower heat dissipation component.

3. A sealed and heat-dissipating high-current inflatable cabinet according to claim 1, characterized in that: Busbar connecting sleeves are fixed on both side end surfaces of the cabinet, and a second copper busbar is connected between the busbar connecting sleeves.

4. A high current inflatable cabinet with good sealing and heat dissipation according to claim 3, characterized in that: The number of the busbar connecting sleeves on a single side of the cabinet is three, the busbar connecting sleeves are evenly distributed up and down, and the number of the second copper bars is three.

5. A sealed and heat-dissipating high-current inflatable cabinet according to claim 4, characterized in that: The third copper bar is connected to both side surfaces of the second copper bar, the lower surface of the third copper bar is connected to a bracket, and a static contact is fixed to one side surface of the third copper bar.

6. A sealed and heat-dissipating high-current inflatable cabinet according to claim 1, characterized in that: Three outer cone sleeves are connected to the lower part of the side end surface of the cabinet, and the ends of the outer cone sleeves are all connected to the first copper busbar.

7. A sealed and heat-dissipating high-current inflatable cabinet according to claim 1, characterized in that: Two through holes are provided on the bottom of the cabinet, and pressure release discs are installed in the through holes.

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