Solid-sealed polar pole, vacuum circuit breaker and gas insulation cabinet

Abstract

The utility model relates to the technical field of switch equipment, and discloses a solid-sealed polar pole, a vacuum circuit breaker and a gas insulation cabinet. The gas insulation cabinet comprises a vacuum circuit breaker, the vacuum circuit breaker comprises an operating mechanism and a solid-sealed polar pole, the solid-sealed polar pole comprises an insulating cylinder, a first conductor, a vacuum arc-extinguishing chamber, a second conductor, an insulating pull rod, a first heat pipe and a second heat pipe, a static contact of the vacuum arc-extinguishing chamber is electrically connected with the second conductor, and a moving contact of the vacuum arc-extinguishing chamber is electrically connected with the first conductor. The lower end of the first heat pipe is inserted into the first conductor, the upper end of the first heat pipe extends out of the insulating cylinder, the lower end of the second heat pipe is inserted into the second conductor, and the upper end of the second heat pipe extends out of the insulating cylinder. According to the solid-sealed polar pole, the heat pipe is arranged at the conductor, so that the heat dissipation efficiency of the conductor can be improved, and the heat dissipation requirement under the large-current use condition can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of switchgear, in particular to a sealed pole, a vacuum circuit breaker and a gas-insulated cabinet. Background Art

[0002] Currently, the most common box-type gas-insulated cabinet (C-GIS) products in China are mainly vacuum circuit breakers paired with direct-acting three-position switches. The vacuum circuit breaker includes an operating mechanism and a sealed pole. The operating mechanism is located outside the cabinet, and the sealed pole is located inside the cabinet. The sealed pole includes two conductors, which are used to electrically connect to the switch inside the cabinet and the external power supply respectively. As users' demand for miniaturized products increases, the volume and internal space of box-type gas-insulated cabinets have correspondingly decreased. However, as the capacity of the power grid continues to increase, the rated current of the switch is also increasing. Under the premise of limited internal space, it brings great challenges to the reliable heat dissipation of the sealed pole.

[0003] In the prior art, heat sink fins are usually installed on the two conductors of the sealed pole. However, the heat dissipation efficiency of the heat sink fins is low and it is difficult to meet the heat dissipation requirements when the switch is used at high current. Utility Model Content

[0004] The first purpose of the present invention is to provide a sealed pole, which can improve the heat dissipation efficiency of the conductor by arranging a heat pipe at the conductor to meet the heat dissipation requirements under high current use conditions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealed pole, comprising an insulating tube, a first conductor, a vacuum interrupter, a second conductor, and an insulating pull rod, wherein the second conductor is electrically connected to a static contact of the vacuum interrupter, and the first conductor is connected to a moving contact of the vacuum interrupter;

[0007] The sealed pole further comprises:

[0008] A first heat dissipation assembly includes a first heat pipe, wherein the lower end of the first heat pipe is inserted into the first conductor and the upper end of the first heat pipe extends outside the insulating cylinder; and / or

[0009] The second heat dissipation component includes a second heat pipe, wherein the lower end of the second heat pipe is inserted into the second conductor, and the upper end of the second heat pipe extends outside the insulating cylinder.

[0010] As an optional solution, the first heat pipe is in an arc shape.

[0011] As an optional solution, the outer side of one end of the first heat pipe away from the first conductor is coated with a heat dissipation layer.

[0012] As an optional solution, the first heat dissipation assembly further includes a first heat dissipation element, which is connected to the first conductor and located at an end of the first conductor away from the first heat pipe, and is provided with a first fin.

[0013] As an optional solution, the second heat dissipation assembly further includes a heat dissipation plate installed outside the insulating cylinder, a vacuum pipe is provided in the heat dissipation plate, and the upper end of the second heat pipe is connected to the heat dissipation plate and communicates with the vacuum pipe.

[0014] As an optional solution, the second heat dissipation component further includes: a plurality of heat dissipation fins, the heat dissipation fins being arranged on a side of the heat dissipation plate away from the second heat pipe; and / or

[0015] As an optional solution, the second heat dissipation assembly also includes: a second heat dissipation member, the second heat dissipation member is connected to the second conductor, a second fin is provided on the second heat dissipation member, the heat dissipation plate is connected to the side of the second heat dissipation member facing away from the second conductor, and the second heat pipe passes through the second heat dissipation member to be inserted into the second conductor.

[0016] As an optional solution, the first conductor is provided with a first through hole penetrating the first conductor;

[0017] The insulating tube includes a main body tube and a first mounting tube. The first mounting tube is arranged to intersect with the main body tube. The openings at both ends of the first mounting tube are respectively two first avoidance holes. The two ends of the first conductor are limited to the first mounting tube, and the two ends of the first through hole are respectively opposite to the two first avoidance holes.

[0018] As an optional solution, the second conductor is provided with a second through hole penetrating the second conductor;

[0019] The insulating tube includes a main body tube and a second mounting tube, the second mounting tube is arranged to intersect with the main body tube, and the openings at both ends of the second mounting tube are respectively two second avoidance holes. The two ends of the second conductor are confined in the second mounting tube, and the two ends of the second through hole are respectively opposite to the two second avoidance holes.

[0020] As an optional solution, two first heat dissipation through holes are provided on the insulating cylinder, and the two first heat dissipation through holes are arranged opposite to each other, and the first heat dissipation through holes are opposite to the insulating pull rod.

[0021] As an optional solution, the second heat dissipation assembly further includes a second heat dissipation through hole, and the second heat dissipation through hole is arranged opposite to the vacuum interrupter.

[0022] The second object of the present invention is to provide a vacuum circuit breaker, which can meet the heat dissipation requirements under high current conditions by providing the above-mentioned sealed pole and has good safety.

[0023] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0024] A vacuum circuit breaker comprises an operating mechanism and the sealed pole, wherein the operating mechanism can drive the insulating pull rod to move.

[0025] The third object of the present invention is to provide a gas-insulated cabinet which, by providing the above-mentioned vacuum circuit breaker, can meet the heat dissipation requirements under high current use conditions and has good safety.

[0026] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0027] A gas-insulated cabinet comprises a cabinet body, an isolating switch and the vacuum circuit breaker, wherein the operating mechanism is installed outside the cabinet body, and the isolating switch and the sealed pole are both installed inside the cabinet body.

[0028] As an optional solution, it further includes a first connecting conductor, which is C-shaped, has a first end connected to the first conductor, and a second end connected to the isolating switch, and the first heat pipe passes through the first end of the first connecting conductor.

[0029] The beneficial effects of the utility model are:

[0030] In the sealed pole of the present invention, when the moving contact and the static contact are connected, the first conductor and the second conductor generate heat. The lower end wall of the first heat pipe absorbs the heat of the first conductor. The liquid heat exchange medium in the first heat pipe absorbs the heat and moves to the upper end of the first heat pipe after vaporization. After the wall at the upper end of the first heat pipe dissipates the heat, the heat exchange medium re-liquefies and flows to the lower end of the first heat pipe to absorb the heat of the first conductor. Similarly, the lower end wall of the second heat pipe absorbs the heat of the second conductor. The liquid heat exchange medium in the second heat pipe absorbs the heat and moves to the upper end of the second heat pipe after vaporization. After the wall at the upper end of the second heat pipe dissipates the heat, the heat exchange medium re-liquefies and flows to the lower end of the second heat pipe to absorb the heat of the second conductor. By providing the first and second heat pipes correspondingly at the first and second conductors, the heat from the first and second conductors can be actively removed by the movement of the heat exchange medium. Compared with the case where only heat dissipation is conducted by heat dissipation fins, the heat dissipation efficiency of the first and second conductors can be improved to meet the heat dissipation requirements under high current conditions.

[0031] The vacuum circuit breaker of this embodiment can meet the heat dissipation requirements under high current use conditions by providing the above-mentioned sealed pole, and has good safety.

[0032] The gas-insulated cabinet of the utility model can meet the heat dissipation requirements under high current use conditions by arranging the vacuum circuit breaker, and has good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the internal structure of a gas-insulated cabinet provided in a specific embodiment of the present utility model;

[0034] Figure 2 This is a top view of a vacuum circuit breaker provided in a specific embodiment of the present utility model;

[0035] Figure 3 This is a cross-sectional view of a sealed pole provided by a specific embodiment of the present utility model;

[0036] Figure 4 This is an exploded view of a portion of the structure of the sealed pole provided in a specific embodiment of the present utility model;

[0037] Figure 5 is a cross-sectional view of a first heat pipe provided in a specific embodiment of the present utility model;

[0038] Figure 6 This is a partial structural diagram of a second heat dissipation assembly provided in a specific embodiment of the present utility model;

[0039] Figure 7 yes Figure 6 Cross-sectional view of the structure.

[0040] In the picture:

[0041] 100, vacuum circuit breaker; 110, operating mechanism; 120, sealed pole; 130, mounting plate; 10, insulating cylinder; 11, main cylinder; 111, first heat dissipation hole; 112, second heat dissipation hole; 113, reinforcing rib; 12, first mounting cylinder; 121, first avoidance hole; 13, second mounting cylinder; 131, second avoidance hole; 14, flange plate; 15, first grading ring; 16, second grading ring; 20, first conductor; 21, First through hole; 22, mounting hole; 30, vacuum interrupter; 40, second conductor; 41, second through hole; 50, insulating pull rod; 51, rod body; 52, insulating shed; 60, static contact; 70, moving contact; 80, first heat sink assembly; 81, first heat pipe; 82, first heat sink; 90, second heat sink assembly; 91, second heat pipe; 92, heat sink; 921, vacuum pipe; 93, heat sink fin; 94, second heat sink;

[0042] 200, isolating switch;

[0043] 300, cabinet; 301, installation chamber; 302, gas box;

[0044] 400. First connecting conductor;

[0045] 500. Second connecting conductor. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0047] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] This embodiment provides a sealed pole, a vacuum circuit breaker and a gas insulated cabinet. Figure 1-Figure 3As shown, the gas-insulated cabinet includes a disconnector 200, a vacuum circuit breaker 100, and a cabinet body 300, wherein the cabinet body 300 is formed with a separate installation chamber 301 and a gas box 302, and the disconnector 200 is installed in the installation chamber 301. In this embodiment, the disconnector 200 can be a direct-acting three-position switch, that is, the disconnector 200 includes a three-phase circuit. The vacuum circuit breaker 100 includes an operating mechanism 110 and a sealed pole 120. The operating mechanism 110 is installed outside the cabinet, and the sealed pole 120 is installed in the gas box 302. The vacuum circuit breaker 100 includes three sealed poles 120, and the three sealed poles 120 are respectively connected to the three-phase circuits of the disconnector 200. Specifically, the vacuum circuit breaker 100 also includes a mounting plate 130. The cabinet 300 has a mounting opening. The mounting plate 130 is abutted and fixed to the outer wall of the cabinet 300, thereby blocking the mounting opening. The operating mechanism 110 and the sealed pole 120 are respectively fixed to either side of the mounting plate 130. Optionally, the mounting plate 130 may be an aluminum plate or a plate made of other materials. The mounting plate 130 has three openings, each corresponding to the three sealed poles 120, to ensure transmission coordination between the sealed poles 120 and the operating mechanism 110.

[0051] like Figure 3 and Figure 4 As shown, the sealed pole 120 includes an insulating tube 10, a first conductor 20, a vacuum interrupter 30, a second conductor 40, and an insulating rod 50. The insulating rod 50, the first conductor 20, the vacuum interrupter 30, and the second conductor 40 are arranged along the axial direction of the insulating tube 10 (i.e. Figure 3 The insulating rod 50 is arranged in sequence in the insulating tube 10 along the X direction in the figure, and the insulating pull rod 50 is located at one end of the insulating tube 10 close to the operating mechanism 110. The vacuum interrupter 30 includes a vacuum cavity, a static contact 60 and a moving contact 70. The moving contact 70 and the static contact 60 are arranged along the X direction. The moving contact is movably connected to the vacuum cavity, and one end is located outside the vacuum cavity, while the other end extends into the interior of the vacuum cavity. One end of the static contact is located in the vacuum cavity and opposite to the moving contact, and the other end of the static contact extends out of the vacuum cavity. One end of the insulating pull rod 50 is transmission-connected to the operating mechanism 110, and the other end is connected to one end of the moving contact 70 located outside the vacuum cavity. The moving contact 70 is electrically connected to the first conductor 20 through a flexible connection structure (not shown in the figure), and the first conductor 20 is connected to the line of the corresponding phase disconnector 200 through the first connecting conductor 400. The second conductor 40 is connected to one end of the static contact 60 located outside the vacuum chamber. The second conductor 40 is connected to an external power source via a second connecting conductor 500. The operating mechanism 110 can drive the insulating rod 50 to reciprocate in the X direction. The insulating rod 50 drives the movable contact 70 to move relative to the vacuum chamber, thereby connecting or disconnecting the movable contact 70 with the static contact 60, thereby connecting or disconnecting the first conductor 20 and the second conductor 40.

[0052] like Figure 3 and Figure 4 As shown, the insulation cylinder 10 can be made of epoxy resin insulation material and formed by injection molding. Furthermore, when molding the insulation cylinder 10, the first conductor 20, the second conductor 40, and the vacuum interrupter 30 can be directly molded into the insulation cylinder 10 as inserts. This not only simplifies the assembly process but also ensures the precise fit of the various components. In this embodiment, a flange plate 14 is provided at the end of the insulation cylinder 10 proximate the operating mechanism 110. The flange plate 14 has through-holes formed therein, which abut against the mounting plate 130. The through-holes are used to secure the insulation cylinder 10 to the mounting plate 130 via fasteners.

[0053] like Figure 3 and Figure 4 As shown, the insulating cylinder 10 is provided with two opposing first avoidance holes 121, with the ends of the first conductor 20 facing the two first avoidance holes 121, respectively. This facilitates the connection between the first conductor 20 and the first connecting conductor 400; further, the first conductor 20 is partially exposed outside the insulating cylinder 10 through the first avoidance holes 121, facilitating heat dissipation for the first conductor 20. Similarly, the insulating cylinder 10 is provided with two opposing second avoidance holes 131, with the ends of the second conductor 40 facing the two second avoidance holes 131, respectively. This facilitates the connection between the second conductor 40 and the second connecting conductor 500; further, the second conductor 40 is partially exposed outside the insulating cylinder 10 through the second avoidance holes 131, facilitating heat dissipation for the second conductor 40. In this embodiment, the two first avoidance holes 121 are arranged opposite each other, one above and one below, and the two second avoidance holes 131 are arranged opposite each other, one above and one below. In other embodiments, the arrangement direction of the two first avoidance holes 121 and the two second avoidance holes 131 is not specifically limited.

[0054] Specifically, the insulating tube 10 includes a main body 11 and a first mounting tube 12. The axis of the first mounting tube 12 is parallel to the vertical direction. The first mounting tube 12 intersects the main body 11. The openings at both ends of the first mounting tube 12 form two first avoidance holes 121. The ends of the first conductor 20 are restrained within the first mounting tube 12. The cooperation between the first mounting tube 12 and the first conductor 20 ensures the stable position of the first conductor 20. The insulating tube 10 also includes a second mounting tube 13. The axis of the second mounting tube 13 is parallel to the vertical direction. The second mounting tube 13 intersects the main body 11. The openings at both ends of the second mounting tube 13 form two second avoidance holes 131. The ends of the second conductor 40 are restrained within the second mounting tube 13. The cooperation between the second mounting tube 13 and the second conductor 40 ensures the stable position of the second conductor 40.

[0055] like Figure 3 and Figure 4As shown, the insulating cylinder 10 is also provided with two first heat dissipation holes 111 arranged in a vertical direction, and the first heat dissipation holes 111 are arranged opposite the insulating tie rod 50. When the gas-insulated cabinet is in operation, airflow within the gas box 302 can flow into the insulating cylinder 10 through the lower first heat dissipation holes 111, flow from bottom to top, and finally be discharged through the upper first heat dissipation holes 111, thereby removing heat from the area near the insulating tie rod 50. In this embodiment, the first heat dissipation holes 111 are provided on the main cylinder 11 and are waist-shaped holes. In other embodiments, the shape of the first heat dissipation holes 111 is not specifically limited.

[0056] like Figure 3 and Figure 4 As shown, the insulating cylinder 10 is further provided with a second heat dissipation hole 112, which is opposite to the vacuum interrupter 30. In this embodiment, since there is less heat near the vacuum interrupter 30, the second heat dissipation hole 112 is only provided on one side of the insulating cylinder 10, which helps to ensure the structural strength of the entire insulating cylinder 10. Of course, in other embodiments, the second heat dissipation hole 112 can also be provided on both sides or multiple sides of the insulating cylinder 10, which is not specifically limited here. Optionally, as Figure 4 As shown, two first heat dissipation holes 111 are provided on one side of the insulation cylinder 10 , and the two first heat dissipation holes 111 extend along the X direction and are provided in parallel.

[0057] like Figure 4 As shown, reinforcing ribs 113 are further provided on the outer wall of the insulation tube 10, thereby improving the structural strength of the entire insulation tube 10. In this embodiment, the reinforcing ribs 113 extend along the X direction. In other embodiments, the reinforcing ribs 113 may also extend along the circumference of the main tube 11, which is not specifically limited here.

[0058] like Figure 3 As shown, the insulating pull rod 50 includes a rod body 51 and an insulating shed 52. The first end of the rod body 51 is connected to the moving contact 70, and the insulating shed 52 surrounds the second end of the rod body 51, thereby preventing the current from being transferred to the operating mechanism 110 through the insulating pull rod 50. Figure 4 As shown, the first conductor 20 is provided with a through hole along the X direction, and the insulating pull rod 50 is passed through the through hole to facilitate connection with the moving contact 70. Optionally, the first conductor 20 can be made of copper material and have a smooth outer surface. The soft connection structure is arranged inside the first conductor 20. Specifically, the first conductor 20 is provided with a mounting hole 22, and the soft connection structure is fixed to the first conductor through the mounting hole 22. The soft connection structure can be specifically a multi-layer copper foil structure that can be deformed along the X direction. Figure 4As shown, the sealed pole 120 also includes a first grading ring 15 and a second grading ring 16. The first grading ring 15 and the second grading ring 16 are respectively connected to the ends of the first conductor 20 along the X direction and respectively cooperate with the inner wall of the insulating tube 10 to ensure uniform force on the first conductor 20. Optionally, the second conductor 40 can be made of copper. Optionally, the first connecting conductor 400 and the second connecting conductor 500 can both be connected by copper busbars to meet high current carrying requirements.

[0059] Preferably, if Figure 3 As shown, the first conductor 20 is provided with a first through hole 21 that passes through the first conductor 20 in the vertical direction, and the two ends of the first through hole 21 are respectively opposite to the two first avoidance holes 121. By providing the first through hole 21 that passes through the first conductor 20 vertically, and the first through hole 21 being opposite to the first avoidance holes 121 on the insulation tube 10, the air flow in the air box 302 can flow in and out of the first conductor 20, thereby removing the heat inside the first conductor 20 and preventing the first conductor 20 or the flexible connection structure from being overheated and damaged. Similarly, as Figure 3 As shown, the second conductor 40 is provided with a second through-hole 41 extending vertically through the second conductor 40, with both ends of the second through-hole 41 facing the two second avoidance holes 131. By providing the second through-hole 41 extending vertically through the second conductor 40, and with the second through-hole 41 facing the second avoidance holes 131 in the insulation cylinder 10, airflow within the air box 302 can flow in and out of the second conductor 40, thereby removing heat from the second conductor 40 and preventing overheating and damage to the first conductor 20 or the static contact 60.

[0060] Because heat generated by the first and second conductors 20 and 40 is relatively concentrated when the gas-insulated switch is in operation, heat dissipation from the first and second conductors 20 and 40 alone is insufficient to meet the heat dissipation requirements of both conductors. Conventional technology typically employs heat dissipation fins installed on both conductors. However, these fins have low heat dissipation efficiency and are insufficient to meet the heat dissipation requirements of high-current switches.

[0061] In this regard, Figure 3 and Figure 5 As shown, the sealed pole 120 further includes a first heat dissipation assembly 80, which includes a first heat pipe 81. The lower end of the first heat pipe 81 is inserted into the first conductor 20, and the upper end extends outside the insulating tube 10. It should be noted that the heat pipe is an existing mature component, which includes a housing and a tube core disposed within the housing. The tube core contains a low-boiling-point heat exchange medium. The working principle of the heat pipe is as follows: after the first end of the heat pipe absorbs heat, the liquid heat exchange medium vaporizes, removes the heat, and moves to the second end of the first heat pipe 81. After the gaseous heat exchange medium dissipates heat at the second end, it re-liquefies and returns to the first end.

[0062] In the sealed pole 120 of this embodiment, after heat is generated near the first conductor 20, the lower end wall of the first heat pipe 81 absorbs the heat near the first conductor 20. The liquid heat exchange medium in the first heat pipe 81 absorbs the heat and moves to the upper end of the first heat pipe 81 after vaporization. After the wall of the upper end of the first heat pipe 81 dissipates the heat, the medium re-liquefies and flows to the lower end of the first heat pipe 81 for circulation to continue absorbing the heat of the first conductor 20. By providing the first heat pipe 81 at the first conductor 20, the movement of the heat exchange medium can be used to actively remove the heat near the first conductor 20. Compared with only providing heat dissipation through heat dissipation fins, the heat dissipation efficiency of the first conductor 20 can be improved to meet the heat dissipation requirements under high current conditions. By providing the above-mentioned sealed pole 120, the vacuum circuit breaker 100 and the gas-insulated cabinet can meet the heat dissipation requirements under high current conditions and have good safety.

[0063] like Figure 3 and Figure 5 As shown, the first heat pipe 81 is curved. On the one hand, in limited space, the curved shape of the first heat pipe 81 can increase its overall length, facilitating more efficient heat transfer for the heat exchange medium and, in turn, more efficient heat dissipation from the first conductor 20. On the other hand, the curved shape of the first heat pipe 81 does not significantly increase its manufacturing and assembly difficulty.

[0064] Preferably, the outer side of the end of the first heat pipe 81 away from the first conductor 20 is coated with a heat dissipation layer. Applying the heat dissipation layer facilitates more efficient heat exchange of the gaseous heat exchange medium, thereby further improving the heat dissipation efficiency of the first conductor 20. Optionally, the heat dissipation layer may be a graphite heat dissipation coating, a metal oxide heat dissipation coating, or the like, which is not specifically limited herein.

[0065] Optionally, in some embodiments, the outer diameter of the lower end of the first heat pipe 81 is the same as the inner diameter of the first through hole 21 in the first conductor 20, and the first heat pipe 81 is directly plugged into the first through hole 21 for fixation. In some embodiments, the upper end of the first conductor 20 is additionally provided with a plug slot, and the first heat pipe 81 is plugged into this plug slot for fixation. In some embodiments, the first heat pipe 81 can also be connected to the first conductor 20 by bonding, fastener connection, or other methods, which are not specifically limited herein.

[0066] In this embodiment, Figure 3As shown, the first connecting conductor 400 is C-shaped. The first end of the first connecting conductor 400 is connected to the first conductor 20, and the second end is connected to the disconnector 200. The first heat pipe 81 passes through the first end of the first connecting conductor 400. In some embodiments, the upper end of the first heat pipe 81 is a free end. After passing through the first end of the first connecting conductor 400, it extends into the C-shaped space of the first connecting conductor 400. In some embodiments, the upper end of the first heat pipe 81 is a free end. After passing through the first end of the first connecting conductor 400, it extends into the C-shaped space of the first connecting conductor 400. In some embodiments, the upper end of the first heat pipe 81 is a free end. After passing through the first end of the first connecting conductor 400, it extends into the C-shaped space of the first connecting conductor 400, and then extends from the C-shaped space to the exterior of the first connecting conductor 400. In some embodiments, the upper end of the first heat pipe 81 passes through the first end of the first connecting conductor 400 and is supported by the second end of the first connecting conductor 400, thereby ensuring the reliable installation of the first heat pipe 81. It should be noted that in this embodiment, a thermal insulation material can be provided between the first heat pipe 81 and the first connecting conductor 400 to prevent heat dissipated by the first heat pipe 81 from being transferred to the first connecting conductor 400.

[0067] In some embodiments, such as Figure 3 As shown, the first heat sink assembly 80 further includes a first heat sink 82, which is connected to the first conductor 20 and located at the end of the first conductor 20 facing away from the first heat pipe 81. The first heat sink 82 is provided with a first fin. The provision of the first heat sink 82 further dissipates heat from the first conductor 20 through heat conduction, thereby improving the overall heat dissipation efficiency of the first conductor 20. Optionally, the first heat sink 82 can be made of copper and contacted and secured to the first conductor 20 by any means, such as bonding or fasteners. In this embodiment, the first heat sink 82 is provided with a center hole, which communicates with the first through-hole 21 in the first conductor 20, thereby ensuring that airflow within the air box 302 can enter and exit the interior of the first conductor 20. Of course, in some embodiments, the first heat sink 82 may not be provided.

[0068] like Figure 3 、 Figure 6 and Figure 7As shown, the sealed pole 120 further includes a second heat dissipation assembly 90, which includes a second heat pipe 91. The lower end of the second heat pipe 91 is inserted into the second conductor 40, and the upper end extends outside the insulating tube 10. In the sealed pole 120 of this embodiment, when heat is generated near the second conductor 40, the lower end wall of the second heat pipe 91 absorbs the heat near the second conductor 40. The liquid heat exchange medium in the second heat pipe 91 absorbs the heat and, after vaporizing, moves to the upper end of the second heat pipe 91. After the upper end wall of the second heat pipe 91 dissipates the heat, the heat exchange medium re-liquefies and flows to the lower end of the second heat pipe 91 for circulation, continuing to absorb heat from the second conductor 40. By providing the second heat pipe 91 near the second conductor 40, the movement of the heat exchange medium can actively remove heat from the second conductor 40. Compared to using only heat dissipation through conductive heat dissipation through heat dissipation fins, this improves the heat dissipation efficiency of the second conductor 40, thereby meeting the heat dissipation requirements under high current operating conditions.

[0069] like Figure 3 、 Figure 6 and Figure 7 As shown, the second heat dissipation assembly 90 also includes a heat sink 92 mounted on the exterior of the insulating tube 10. A vacuum duct 921 is provided within the heat sink 92. The upper ends of the second heat pipes 91 are connected to the heat sink 92 and communicate with the vacuum duct 921. By providing the heat sink 92 and communicating the vacuum duct 921 of the heat sink 92 with each of the second heat pipes 91, the heat exchange area of ​​the gaseous heat exchange medium can be increased, and the liquefaction rate and overall circulation rate of the gaseous heat exchange medium can be accelerated, thereby further improving the heat dissipation efficiency of the second conductor 40. In this embodiment, the heat sink 92 is a metal disk, and four second heat pipes 91 are provided. The four second heat pipes 91 are arranged in parallel and are all communicated with the vacuum duct 921 within the heat sink 92. In other embodiments, the number of second heat pipes 91 can be flexibly set according to needs.

[0070] like Figure 6 As shown, the second heat sink assembly 90 further includes a plurality of heat sink fins 93, which are disposed on the side of the heat sink 92 facing away from the second heat pipe 91. The provision of the heat sink fins 93 can further accelerate the liquefaction rate and overall circulation rate of the gaseous heat exchange medium, thereby further improving the heat dissipation efficiency of the second conductor 40. In this embodiment, the heat sink fins 93 are metal sheets and can be secured to the heat sink 92 by welding, bonding, or other methods.

[0071] Preferably, the second heat sink assembly 90 further includes a second heat sink 94, which is connected to the second conductor 40 and is provided with second fins. The provision of the second heat sink 94 further dissipates heat from the second conductor 40 through heat conduction, thereby improving the overall heat dissipation efficiency of the second conductor 40. Optionally, the second heat sink 94 can be made of copper and contacted and secured to the second conductor 40 by any means, such as bonding or fasteners. In this embodiment, the second heat sink 94 is mounted on the upper end of the second conductor 40, the heat sink 92 is connected to the side of the second heat sink 94 facing away from the second conductor 40, and the second heat pipe 91 passes through the second heat sink 94 and is inserted into the second conductor 40.

[0072] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will, based on the concept of the present invention, vary the specific implementation methods and scope of application, and the contents of this specification should not be construed as limiting the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The solid-sealed pole is characterized by: The invention comprises an insulating cylinder (10), a first conductor (20), a vacuum interrupter (30), a second conductor (40), and an insulating pull rod (50), wherein the second conductor (40) is electrically connected to a static contact of the vacuum interrupter (30), and the first conductor (20) is connected to a moving contact (70) of the vacuum interrupter (30); The sealed pole further comprises: A first heat dissipation assembly (80) comprises a first heat pipe (81), wherein the lower end of the first heat pipe (81) is inserted into the first conductor (20) and the upper end extends outside the insulating tube (10); and / or The second heat dissipation assembly (90) comprises a second heat pipe (91), wherein the lower end of the second heat pipe (91) is inserted into the second conductor (40), and the upper end of the second heat pipe (91) extends outside the insulating tube (10).

2. The sealed pole according to claim 1, characterized in that: The first heat pipe (81) is in an arc shape; and / or The outer side of one end of the first heat pipe (81) away from the first conductor (20) is coated with a heat dissipation layer.

3. The sealed pole according to claim 1, wherein: The first heat dissipation assembly (80) further comprises a first heat dissipation member (82), the first heat dissipation member (82) being connected to the first conductor (20) and being located at an end of the first conductor (20) facing away from the first heat pipe (81), and a first fin being provided on the first heat dissipation member (82).

4. The sealed pole according to claim 1, wherein: The second heat dissipation assembly (90) further comprises a heat dissipation plate (92) mounted on the outside of the insulating cylinder (10), a vacuum pipe (921) being provided in the heat dissipation plate (92), and the upper end of the second heat pipe (91) is connected to the heat dissipation plate (92) and communicates with the vacuum pipe (921).

5. The sealed pole according to claim 4, characterized in that: The second heat dissipation component (90) further includes: a plurality of heat dissipation fins (93), the heat dissipation fins (93) being arranged on a side of the heat dissipation plate (92) facing away from the second heat pipe (91); and / or A second heat sink (94), the second heat sink (94) is connected to the second conductor (40), a second fin is provided on the second heat sink (94), the heat sink (92) is connected to a side of the second heat sink (94) facing away from the second conductor (40), and the second heat pipe (91) passes through the second heat sink (94) to be inserted into the second conductor (40).

6. The sealed pole according to any one of claims 1 to 5, characterized in that: The first conductor (20) is provided with a first through hole (21) penetrating the first conductor (20); The insulating cylinder (10) comprises a main body cylinder (11) and a first mounting cylinder (12); the first mounting cylinder (12) is intersected with the main body cylinder (11); the openings at both ends of the first mounting cylinder (12) are respectively two first avoidance holes (121); the two ends of the first conductor (20) are limited to the first mounting cylinder (12); and the two ends of the first through hole (21) are respectively opposite to the two first avoidance holes (121).

7. The sealed pole according to any one of claims 1 to 5, characterized in that: The second conductor (40) is provided with a second through hole (41) penetrating the second conductor (40); The insulating tube (10) comprises a main body tube (11) and a second mounting tube (13); the second mounting tube (13) is intersected with the main body tube (11); the openings at both ends of the second mounting tube (13) are respectively two second avoidance holes (131); the two ends of the second conductor (40) are confined within the second mounting tube (13); and the two ends of the second through hole (41) are respectively opposite to the two second avoidance holes (131).

8. The sealed pole according to any one of claims 1 to 5, characterized in that: The insulating cylinder (10) is provided with: Two first heat dissipation through holes (111) are arranged opposite to each other, wherein the first heat dissipation through holes (111) are opposite to the insulating pull rod (50); and / or The second heat dissipation through hole (112) is arranged opposite to the vacuum interrupter chamber (30).

9. A vacuum circuit breaker, characterized in that: It comprises an operating mechanism (110) and the sealed pole according to any one of claims 1 to 8, wherein the operating mechanism (110) is capable of driving the insulating pull rod (50) to move.

10. A gas insulated cabinet, characterized in that: The invention comprises a cabinet (300), an isolating switch (200), and the vacuum circuit breaker according to claim 9, wherein the operating mechanism (110) is installed outside the cabinet (300), and the isolating switch (200) and the sealed pole are both installed inside the cabinet (300); The gas-insulated cabinet further comprises a first connecting conductor (400), the first connecting conductor (400) being C-shaped, a first end of the first connecting conductor (400) being connected to the first conductor (20), and a second end being connected to the disconnector (200), and the first heat pipe (81) passing through the first end of the first connecting conductor (400).

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