A busbar and drawer type circuit breaker

Abstract

The present application provides a busbar and a drawer-type circuit breaker, which belongs to the technical field of electrical equipment. The busbar provided by the present application is applied to a drawer-type circuit breaker, and the drawer-type circuit breaker includes a bundle clamp. The busbar includes a busbar group, which includes a plurality of busbars, the first ends of the plurality of busbars are used to connect with the bundle clamps, and there is a gap between the second ends of the plurality of busbars, and the gap is used for external conductive parts to be inserted. The present application arranges the busbar in the form of a busbar group, and the busbar group includes a plurality of busbars, so that when the current of an external power supply flows into the drawer-type circuit breaker through the external conductive parts and the busbar, the contact area of ​​the current flow can be increased, thereby reducing the temperature rise at the busbar, and reducing the damage to the internal components of the drawer-type circuit breaker caused by excessive temperature, thereby increasing the service life of the drawer-type circuit breaker.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a busbar and a drawer-type circuit breaker. Background Art

[0002] A drawer type circuit breaker is a circuit breaker with a modular design, used to protect and control circuits. A drawer type circuit breaker generally includes a circuit breaker body and a drawer base. The circuit breaker body is slidably connected to the drawer base and can be shaken out of the drawer base. The circuit breaker body is generally connected to external conductive parts through a busbar.

[0003] In the prior art, the temperature of the busbar of the drawer-type circuit breaker is easily too high, which affects the internal components of the drawer-type circuit breaker and thus affects the overall service life of the drawer-type circuit breaker. Therefore, a busbar and a drawer-type circuit breaker are urgently needed. Utility Model Content

[0004] The present application provides a busbar and a drawer-type circuit breaker, which can reduce the temperature rise at the busbar of the drawer-type circuit breaker and increase the service life of the drawer-type circuit breaker.

[0005] In a first aspect, the present application provides a busbar, which is applied to a drawer-type circuit breaker, and the drawer-type circuit breaker includes a bundle clamp. The busbar includes: a busbar group, the busbar group includes a plurality of busbars, the first ends of the plurality of busbars are used to connect with the bundle clamp, and there is a gap between the second ends of the plurality of busbars, and the gap is used for inserting an external conductive member.

[0006] Through the above scheme, the present application arranges the busbar in the form of a busbar group, so that the busbar group includes multiple busbars, and a gap is provided between the second ends of the multiple busbars. When the external power supply is connected to the drawer-type circuit breaker, the external conductive member can be inserted into the gap and connected to the busbar, thereby increasing the contact area between the external conductive member and the busbar. When the current of the external power supply flows into the drawer-type circuit breaker through the external conductive member and the busbar, the contact area for current flow can be increased, thereby reducing the temperature rise at the busbar, and reducing the damage to the internal components of the drawer-type circuit breaker caused by excessive temperature, thereby increasing the service life of the drawer-type circuit breaker.

[0007] In one possible design, when the number of busbars is two, the busbar group includes a first busbar and a second busbar, at least one of the first busbar and the second busbar is bent, the first end of the first busbar and the first end of the second busbar are used to connect the bundle clamps, and a gap is formed between the second end of the first busbar and the second end of the second busbar.

[0008] Through the above scheme, a gap can be formed between the second end of the first busbar and the second end of the second busbar by bending the first busbar and / or the second busbar, and while the bundle clamp fixes the busbar group, the external conductive member can be inserted into the gap to connect the busbar to the external power supply. When the current flows into the busbar group through the external conductive member, the current can flow to the inside of the drawer-type circuit breaker through the first busbar and the second busbar respectively, thus increasing the contact area of ​​the current flow and achieving the effect of reducing the temperature rise at the busbar.

[0009] In a possible design, when the number of busbar groups is three, the busbar group includes a first busbar, a second busbar and a third busbar, and the second busbar is located between the first busbar and the third busbar. The first busbar, the second busbar and the third busbar are all in the shape of a flat plate, and the second end of the second busbar is retracted toward the first ends of the plurality of busbars relative to the second end of the first busbar and the second end of the third busbar, so that a gap is formed between the second end of the first busbar and the second end of the third busbar.

[0010] Through the above scheme, the external conductive member can be inserted into the gap formed between the first busbar and the third busbar, and the external conductive member can abut against the second end of the second busbar, so that the external conductive member can be in contact with the first busbar, the second busbar and the third busbar at the same time, so that when the current flows into the busbar group through the external conductive member, the current can flow to the inside of the drawer-type circuit breaker through the first busbar, the second busbar and the third busbar respectively, further increasing the contact area for current flow and achieving the effect of reducing the temperature rise at the busbar.

[0011] In a possible design, when the number of busbar groups is three, the busbar group includes a first busbar, a second busbar and a third busbar, and the second busbar is located between the first busbar and the third busbar. The first busbar and the third busbar are bent, the second busbar is in a flat plate shape, and a gap is formed between the second end of the first busbar and the second end of the third busbar and the second end of the second busbar.

[0012] Through the above scheme, when multiple external conductive parts need to be connected to ensure the smooth operation of the drawer-type circuit breaker, the third setting method can be selected. The second busbar can replace the metal pads required between multiple copper bars in the original technology. In this way, while reducing the temperature rise of the drawer-type circuit breaker, it also reduces the use of metal pads between multiple external conductive parts, thereby reducing the use cost of the drawer-type circuit breaker.

[0013] In a possible design, the busbar includes at least one heat sink, which is connected to the busbar.

[0014] Through the above scheme, the present application sets a heat sink in the bus and connects the heat sink to the busbar, so that a part of the heat generated when the current passes through the busbar is transferred to the heat sink, thereby achieving the effect of assisting the heat dissipation of the busbar, thereby reducing the temperature rise at the busbar and thus reducing the damage to the internal components of the drawer-type circuit breaker caused by excessive temperature, thereby increasing the service life of the drawer-type circuit breaker.

[0015] In a possible design, the surface of the heat sink connected to the busbar is a plane, and the remaining surfaces of the heat sink except the surface used for connecting to the busbar are all wavy surfaces.

[0016] Through the above scheme, the present application sets the remaining surfaces of the heat sink except the surface used for connection with the busbar as wavy surfaces, which can effectively increase the contact area between the heat sink and the air, so that the heat dissipation effect of the heat sink is significantly improved, thereby further reducing the temperature rise at the bus.

[0017] In a possible design, a limiting portion is provided on one side of the busbar assembly close to the bundled clamps, and the limiting portion is used to cooperate with the bundled clamps to fix the bundled clamps on the busbars and prevent them from falling off.

[0018] Through the above scheme, the present application sets a limiting portion on one side of the busbar group close to the bundle clamp. When the bundle clamp is connected to the busbar group, the setting of the limiting portion can increase the firmness of the bundle clamp when fixing the busbar, thereby reducing the probability of the bundle clamp falling off from the busbar due to the loose connection between the bundle clamp and the busbar when the drawer-type circuit breaker shakes or bumps, or when the circuit breaker body moves in and out of the drawer, thereby affecting the use of the drawer-type circuit breaker.

[0019] In a possible design, the drawer-type circuit breaker includes a drawer seat, and the busbar further includes a mounting frame, a first portion of the mounting frame is connected to the busbar group, and a second portion of the mounting frame is used to connect to the drawer seat.

[0020] Through the above solution, the present application uses a mounting frame to fix the busbar and the drawer seat, thereby increasing the installation stability of the busbar.

[0021] In a possible design, the second ends of the plurality of busbars are each provided with a fastening hole, which is used for fasteners to pass through to fix the external conductive member.

[0022] Through the above scheme, the present application sets fastening holes at the second ends of multiple busbars. When the external conductive part is connected to the bus, the external conductive part can be fixed by the cooperation of the fastener and the fastening hole. In this way, the stability of the connection between the external conductive part and the bus can be increased.

[0023] In a second aspect, the present application provides a drawer-type circuit breaker, which includes a contact row, a circuit breaker body, and the bus mentioned in the first aspect. The circuit breaker body is slidably connected in the drawer seat. The first end of the contact row is connected to the first end of the bundle clamp, and the second end of the contact row is connected to the circuit breaker body. The first end of the bus is connected to the second end of the bundle clamp, and the second end of the bus is connected to the external conductive member.

[0024] Through the above scheme, the present application connects the first end of the contact row to the first end of the bundle clamp, connects the second end of the contact row to the circuit breaker body, connects the first end of the bus bar to the second end of the bundle clamp, and connects the second end of the bus bar to the external conductive member. Under the premise of not affecting the normal operation of the drawer-type circuit breaker, the temperature rise at the bus bar of the drawer-type circuit breaker can be reduced, thereby increasing the service life of the drawer-type circuit breaker.

[0025] The beneficial effects of the drawer-type circuit breaker provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the various possible implementation methods of the first aspect, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the assembly structure of a circuit breaker body and a busbar provided in an embodiment of the present application.

[0027] Figure 2 A schematic diagram of the assembly structure of a circuit breaker body and a drawer seat provided in an embodiment of the present application.

[0028] Figure 3 A schematic diagram of the assembly structure of the busbar group and the bundled clamps provided in an embodiment of the present application.

[0029] Figure 4 This is the first configuration form of the busbar group provided in the embodiment of the present application.

[0030] Figure 5 This is the second configuration of the busbar group provided in the embodiment of the present application.

[0031] Figure 6 This is the third configuration of the busbar group provided in the embodiment of the present application.

[0032] Figure 7 This is the fourth configuration of the busbar group provided in the embodiment of the present application.

[0033] Figure 8 A schematic diagram of the assembly structure of the busbar group and the heat dissipation device provided in an embodiment of the present application.

[0034] Fig. 9 A schematic diagram of the structure of the mounting frame provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100, busbar group; 110, first busbar; 111, first end of the first busbar; 112, second end of the first busbar; 120, second busbar; 121, first end of the second busbar; 122, second end of the second busbar; 130, third busbar; 131, first end of the third busbar; 132, second end of the third busbar; 140, limiter;

[0037] 200, gap;

[0038] 300, a bundle-shaped chuck; 310, a first end of the bundle-shaped chuck; 320, a second end of the bundle-shaped chuck;

[0039] 400. heat dissipation device;

[0040] 500, mounting frame; 510, first portion; 520, second portion;

[0041] 600, fastening hole;

[0042] 700, drawer seat;

[0043] 800, contact row; 810, first end of the contact row; 820, second end of the contact row;

[0044] 900. Circuit breaker body. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0047] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The directional words appearing in the following description are all directions shown in the figures, and do not limit the static contact of a circuit breaker of the present application and the specific structure of the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0052] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0054] Figure 1 A schematic diagram of the assembly structure of a circuit breaker body and a busbar provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the assembly structure of the circuit breaker body and the drawer seat provided in the embodiment of the present application. Figure 1 as well as Figure 2 As shown, the present application provides a drawer-type circuit breaker, which includes a contact row 800, a circuit breaker body 900 and a busbar. The circuit breaker body 900 is slidably connected in the drawer seat 700. The first end 810 of the contact row is connected to the first end 310 of the bundle clamp, and the second end 820 of the contact row is connected to the circuit breaker body 900. The first end of the busbar is connected to the second end 320 of the bundle clamp, and the second end of the busbar is connected to the external conductive member.

[0055] The drawer type circuit breaker is a special low voltage circuit breaker, and its design feature is that the circuit breaker body 900 can be freely moved in and out of the drawer seat 700 of the drawer type circuit breaker like a drawer. The drawer type circuit breaker has the advantages of convenient maintenance, high flexibility and space saving. The drawer type circuit breaker is widely used in factories, commercial buildings, residential areas and other places as an important protection device for low voltage distribution network.

[0056] The drawer base 700 is also called a drawer unit or a drawer frame, and is an important component for installing a circuit breaker in a control cabinet or a distribution box. The drawer base 700 can make the installation, maintenance and replacement of the circuit breaker more convenient.

[0057] The circuit breaker body 900 is slidably connected in the drawer seat 700, so that the circuit breaker body 900 can be withdrawn from the drawer seat 700 alone for inspection, replacement or maintenance without shutting down the entire circuit.

[0058] The contact bar 800 may be plate-shaped, and the second end 820 of the contact bar is connected to the circuit breaker body 900 . The contact bar 800 is connected to the busbar through the bundle clamp 300 so that the external current can be conducted to the circuit breaker body 900 , thereby ensuring that the power system can operate normally.

[0059] The busbar of the drawer seat 700 is an important part connecting the circuit breaker with the external power source and the circuit breaker body 900. The first end of the busbar is connected to the second end 320 of the bundle clamp, and the second end of the busbar is connected to the external conductive member, so that the external current can flow into the contact bar 800 through the busbar. The busbar includes a busbar group 100, and the busbar group 100 includes a plurality of busbars.

[0060] In the present application, the first end 810 of the contact bar is connected to the first end 310 of the bundle clamp, the second end 820 of the contact bar is connected to the circuit breaker body 900, the first end of the bus bar is connected to the second end 320 of the bundle clamp, and the second end of the bus bar is connected to the external conductive member. Under the premise of not affecting the normal operation of the drawer-type circuit breaker, the temperature rise at the bus bar of the drawer-type circuit breaker can be reduced, thereby increasing the service life of the drawer-type circuit breaker.

[0061] The bus provided in this application is explained in detail below with reference to the accompanying drawings.

[0062] Figure 3 This is a schematic diagram of the assembly structure of the busbar assembly and the bundled clamp provided in the embodiment of the present application. Figures 1 to 3 As shown, the present application provides a busbar, which is applied to a drawer-type circuit breaker, and the drawer-type circuit breaker includes a bundle clamp 300. The busbar includes: a busbar group 100, the busbar group 100 includes a plurality of busbars, the first ends of the plurality of busbars are used to be connected to the bundle clamp 300, and there is a gap 200 between the second ends of the plurality of busbars, and the gap 200 is used for inserting an external conductive member.

[0063] The busbar group 100 may include two, three, five, etc. busbars. The busbars may be arranged in parallel, or at a certain angle to each other.

[0064] It should be noted that the first ends of the multiple busbars should be close to each other so that the bundle clamp 300 can fix the multiple busbars, and there should be a gap 200 between the second ends of the multiple busbars.

[0065] The external conductive member can be inserted into the gap 200 between the second ends of the plurality of busbars to realize electrical connection with the busbars. When the external conductive member is inserted into the gap 200, the surface of the busbar away from the gap 200 can also realize electrical connection with the external conductive member. When the output current of the power supply end is too large, multiple external conductive members can be connected to the busbar, which can make the operation of the drawer-type circuit breaker more stable, and can also disperse the current originally flowing through a single external conductive member to multiple external conductive members, thereby increasing the heat dissipation effect and prolonging the service life of the external conductive member.

[0066] The multiple busbars may all be plate-shaped structures and may be made of conductive materials such as copper or aluminum.

[0067] In summary, the present application arranges the busbar in the form of a busbar group 100, so that the busbar group 100 includes multiple busbars, and a gap 200 is provided between the second ends of the multiple busbars. When the external power supply is connected to the drawer-type circuit breaker, the external conductive member can be inserted into the gap 200 to connect with the busbar, thereby increasing the contact area between the external conductive member and the busbar. When the current of the external power supply flows into the drawer-type circuit breaker through the external conductive member and the busbar, the contact area of ​​the current flow can be increased, thereby reducing the temperature rise at the busbar, and reducing the damage to the internal components of the drawer-type circuit breaker caused by excessive temperature, thereby increasing the service life of the drawer-type circuit breaker.

[0068] Since in the prior art, copper bars are often used to connect the drawer-type circuit breaker to the external power supply, when the current of the external power supply is too large, multiple copper bars need to be connected to ensure the smooth operation of the drawer-type circuit breaker. When the busbar of the present application is used, the setting of multiple busbars can replace the metal pads required between multiple copper bars in the original technology. In this way, while reducing the temperature rise of the drawer-type circuit breaker, it also reduces the use of metal pads between multiple copper bars, thereby reducing the use cost of the drawer-type circuit breaker.

[0069] There may be various ways to set the number of busbars, the arrangement of busbars, and the combination of multiple busbars, so as to achieve the effect of reducing the temperature rise of the drawer-type circuit breaker when the external conductive member is connected to the busbar. Three possible implementation methods are shown below.

[0070] Figure 4 This is the first configuration form of the busbar group provided in the embodiment of the present application. Figure 5 This is the second configuration of the busbar group provided in the embodiment of the present application.

[0071] The first method is as Figure 4 as well as Figure 5As shown, when the number of busbars is two, the busbar group 100 includes a first busbar 110 and a second busbar 120, at least one of the first busbar 110 and the second busbar 120 is bent, the first end 111 of the first busbar and the first end 121 of the second busbar are used to connect the bundle clamp 300, and a gap 200 is formed between the second end 112 of the first busbar and the second end 122 of the second busbar.

[0072] The first busbar 110 may be arranged in parallel with the second busbar 120. The first end 111 of the first busbar and the first end 121 of the second busbar may fit together, so that the bundle clamp 300 can fix the busbar assembly 100 more firmly.

[0073] For example, Figure 4 As shown, the first busbar 110 can be bent and the second busbar 120 can be in the shape of a flat plate. Alternatively, the second busbar 120 can be bent and the first busbar 110 can be in the shape of a flat plate.

[0074] Or, if Figure 5 As shown, the first busbar 110 and the second busbar 120 are both bent. When the first busbar 110 and the second busbar 120 are both bent, the first busbar 110 and the second busbar 120 are mirror images, so that a gap 200 can be formed between the second end 112 of the first busbar and the second end 122 of the second busbar.

[0075] Through the first method described above, the first busbar 110 and / or the second busbar 120 are bent, and a gap 200 is formed between the second end 112 of the first busbar and the second end 122 of the second busbar. In this way, while the bundle clamp 300 fixes the busbar group 100, the external conductive member can be inserted into the gap 200 to connect the busbar to the external power supply. When the current flows into the busbar group 100 through the external conductive member, the current can not only flow to the inside of the drawer-type circuit breaker through the first busbar 110, but also flow to the inside of the drawer-type circuit breaker through the second busbar 120. In this way, the contact area of ​​the current flow is increased, and the effect of reducing the temperature rise at the busbar is achieved.

[0076] Figure 6 This is the third configuration form of the busbar group provided in the embodiment of the present application. Figure 6As shown, when the number of busbar groups 100 is three, the busbar group 100 includes a first busbar 110, a second busbar 120 and a third busbar 130, and the second busbar 120 may be located between the first busbar 110 and the third busbar 130. The first busbar 110, the second busbar 120 and the third busbar 130 may all be in the shape of a flat plate, and the second end 122 of the second busbar may be retracted toward the first ends of the plurality of busbars relative to the second end 112 of the first busbar and the second end 132 of the third busbar, so that a gap 200 is formed between the second end 112 of the first busbar and the second end 132 of the third busbar.

[0077] The first busbar 110 , the second busbar 120 and the third busbar 130 may be arranged parallel to each other in pairs, and the first busbar 110 , the second busbar 120 and the third busbar 130 may be fitted to each other in pairs, so that the bundle clamp 300 is more secure when fixing the busbar assembly 100 .

[0078] The second end 122 of the second busbar is retracted toward the first ends of the plurality of busbars relative to the second end 112 of the first busbar and the second end 132 of the third busbar, so that a gap 200 is formed between the first busbar 110 and the third busbar 130 to allow an external conductive member to be inserted.

[0079] Through the above-mentioned second method, the external conductive member can be inserted into the gap 200 formed between the first busbar 110 and the third busbar 130, and the external conductive member can abut against the second end 122 of the second busbar, so that the external conductive member can simultaneously contact the first busbar 110, the second busbar 120 and the third busbar 130, so that when the current flows into the busbar group 100 through the external conductive member, the current can simultaneously flow through the first busbar 110, the second busbar 120 and the third busbar 130 to the inside of the drawer-type circuit breaker, further increasing the contact area for current flow and achieving the effect of reducing the temperature rise at the busbar.

[0080] Figure 7 This is the fourth configuration form of the busbar group provided in the embodiment of the present application. Figure 7 As shown, when the number of busbar groups 100 is three, the busbar group 100 includes a first busbar 110, a second busbar 120 and a third busbar 130, and the second busbar 120 can be located between the first busbar 110 and the third busbar 130. The first busbar 110 and the third busbar 130 can be bent, and the second busbar 120 can be in the shape of a flat plate, and a gap 200 is formed between the second end 112 of the first busbar and the second end 132 of the third busbar and the second end 122 of the second busbar.

[0081] The first busbar 110, the second busbar 120 and the third busbar 130 may be arranged parallel to each other in pairs, and the first busbar 110 and the third busbar 130 may be arranged symmetrically with the second busbar 120 as the symmetry axis, so that a gap 200 is formed between the second end 112 of the first busbar and the second end 132 of the third busbar and the second end 122 of the second busbar. The first end 111 of the first busbar, the first end 121 of the second busbar and the first end 131 of the third busbar may be fitted to each other in pairs, so that the bundled clamp 300 is more secure when fixing the busbar group 100.

[0082] When the current of the external power supply is too large, it is necessary to connect multiple external conductive parts to ensure the smooth operation of the drawer-type circuit breaker. The third method can be selected. The second busbar 120 can replace the metal spacers required between multiple copper bars in the original technology. In this way, while reducing the temperature rise of the drawer-type circuit breaker, it also reduces the use of metal spacers between multiple external conductive parts, thereby reducing the use cost of the drawer-type circuit breaker.

[0083] Figure 8 This is a schematic diagram of the assembly structure of the busbar group and the heat dissipation device provided in the embodiment of the present application. Figure 8 As shown, the busbar includes at least one heat sink 400, and the heat sink 400 is connected to the busbar.

[0084] The heat sink 400 can be integrally formed with the busbar when the busbar is formed, or the heat sink 400 and the busbar can be formed separately and then assembled. The heat sink 400 can be prismatic, cylindrical, or plate-shaped.

[0085] Through the above-mentioned configuration, the present application sets a heat sink 400 in the bus and connects the heat sink 400 to the busbar, so that a part of the heat generated when the current passes through the busbar is transferred to the heat sink 400, thereby achieving the effect of assisting the heat dissipation of the busbar, thereby reducing the temperature rise at the busbar and thus reducing the damage to the internal components of the drawer-type circuit breaker caused by excessive temperature, thereby increasing the service life of the drawer-type circuit breaker.

[0086] In a possible design, the surface of the heat sink 400 connected to the busbar is a plane, and the surfaces of the heat sink 400 other than the surface used for connecting to the busbar are all wavy surfaces. In this way, the contact area between the heat sink 400 and the air can be effectively increased, so that the heat dissipation effect of the heat sink 400 is significantly improved, thereby further reducing the temperature rise at the busbar.

[0087] In actual use, the surface of the heat sink 400 used for connecting to the busbar can also be provided with a protrusion, and the surface of the busbar used for connecting to the heat sink 400 can be provided with a groove that matches the protrusion. When the heat sink 400 needs to be installed on the busbar, the protrusion can be snapped into the groove. In this way, the contact area between the heat sink 400 and the busbar is increased, and the efficiency of heat conduction from the busbar to the heat sink 400 can be increased by increasing the contact surface, thereby reducing the temperature rise at the busbar.

[0088] like Figure 1 , Figure 3 as well as Figure 8 As shown, a limiting portion 140 is provided on one side of the busbar assembly 100 close to the bundle clamp 300 , and the limiting portion 140 is used to cooperate with the bundle clamp 300 so that the bundle clamp 300 is fixed on the busbar assembly 100 and does not fall off.

[0089] The limiting portion 140 can be arranged on the busbar in contact with the bundle clamp 300. The limiting portion 140 can be a protrusion structure arranged on the busbar, or a groove structure arranged on the busbar. When the bundle clamp 300 needs to be connected to the busbar, the protrusion can be snapped into the groove. The limiting portion 140 can be integrally formed with the busbar, or the limiting portion 140 can be formed separately from the busbar and then assembled, or the limiting portion 140 can be arranged on the busbar by cutting or carving after the busbar is formed.

[0090] In summary, the present application sets a limit portion 140 on one side of the busbar group 100 close to the bundle clamp 300. When the bundle clamp 300 is connected to the busbar group 100, the setting of the limit portion 140 can increase the reliability of the bundle clamp 300 when connected to the busbar, and reduce the probability of the bundle clamp 300 falling off due to the loose connection of the bundle clamp 300 when the drawer-type circuit breaker shakes or bumps, or when the circuit breaker body 900 enters and exits the drawer seat 700, thereby affecting the use of the drawer-type circuit breaker.

[0091] Fig. 9 This is a schematic diagram of the structure of the mounting frame provided in the embodiment of the present application. Figure 2 , Figure 3 as well as Fig. 9 As shown, the drawer-type circuit breaker includes a drawer seat 700 , and the busbar further includes a mounting frame 500 , a first portion 510 of the mounting frame 500 is connected to the busbar assembly 100 , and a second portion 520 of the mounting frame 500 is used to connect to the drawer seat 700 .

[0092] The mounting frame 500 may be L-shaped, the first portion 510 is fitted with the busbar assembly 100, the first portion 510 is connected to the busbar assembly 100 via fasteners, the second portion 520 is fitted with the bottom frame base of the drawer seat 700, and the second portion 520 is connected to the bottom frame base of the drawer seat 700 via fasteners.

[0093] Through the above arrangement, the present application utilizes the mounting frame 500 to fix the busbar and the drawer seat 700, thereby increasing the installation stability of the busbar.

[0094] like Figures 3 to 8 As shown, the second ends of the plurality of busbars are each provided with a fastening hole 600. The fastening hole 600 is used for fasteners to pass through so as to fix the external conductive member.

[0095] The fastening holes 600 may pass through a plurality of busbars, and may be circular holes or square holes, etc. The fastening holes 600 may be integrally formed with the busbars when the busbars are formed, or they may be provided on the busbars by cutting or carving after the busbars are formed.

[0096] There are many ways to fix the external conductive part by cooperating with the fastening hole 600 and the fastener. The present application only gives an example of one of the ways. For example, when the fastening hole 600 is a circular hole and when the fastener is a bolt, the bolt can pass through the fastening hole 600 and be fastened with a nut to fix the external conductive part.

[0097] Through the above-mentioned configuration, the present application provides fastening holes 600 at the second ends of multiple busbars, and when the external conductive member is connected to the busbar, the external conductive member can be fixed by the cooperation of the fastener and the fastening hole 600. In this way, the stability of the connection between the external conductive member and the busbar can be increased, and the probability of the external conductive member falling off the busbar due to the external conductive member not being fixed when the drawer-type circuit breaker shakes or bumps is reduced, thereby affecting the use of the drawer-type circuit breaker.

Claims

1. A busbar, the busbar being applied to a drawer-type circuit breaker, the drawer-type circuit breaker comprising a bundled clamp, characterized in that: The busbar comprises: The busbar group comprises a plurality of busbars, wherein the first ends of the plurality of busbars are used to be connected with the bundle clamps, and there are gaps between the second ends of the plurality of busbars, and the gaps are used to allow external conductive parts to be inserted.

2. The busbar according to claim 1, characterized in that: When the number of the busbars is two, the busbar group includes a first busbar and a second busbar, at least one of the first busbar and the second busbar is bent, the first end of the first busbar and the first end of the second busbar are used to connect the bundle clamps, and the gap is formed between the second end of the first busbar and the second end of the second busbar.

3. The busbar according to claim 1, characterized in that: When the number of the busbar groups is three, the busbar group includes a first busbar, a second busbar and a third busbar, and the second busbar is located between the first busbar and the third busbar; The first busbar, the second busbar and the third busbar are all flat-plate-shaped, and the second end of the second busbar is retracted toward the first ends of the plurality of busbars relative to the second ends of the first busbar and the third busbar, so that the gap is formed between the second ends of the first busbar and the third busbar.

4. The busbar according to claim 1, characterized in that: When the number of the busbar groups is three, the busbar group includes a first busbar, a second busbar and a third busbar, and the second busbar is located between the first busbar and the third busbar; The first busbar and the third busbar are bent, the second busbar is in the shape of a flat plate, and the gap is formed between the second end of the first busbar and the second end of the third busbar and the second end of the second busbar.

5. The busbar according to any one of claims 1 to 4, characterized in that: The busbar includes at least one heat sink, and the heat sink is connected to the busbar.

6. The busbar according to claim 5, characterized in that: The surface of the heat sink connected to the busbar is a plane, and the remaining surfaces of the heat sink except the surface used for connecting to the busbar are all wavy surfaces.

7. The busbar according to claim 1, characterized in that: A limiting portion is provided on one side of the busbar assembly close to the bundled clamps, and the limiting portion is used to cooperate with the bundled clamps so that the bundled clamps are fixed on the busbars and do not fall off.

8. The busbar according to claim 1, characterized in that: The drawer-type circuit breaker includes a drawer seat, and the busbar also includes a mounting frame, a first portion of the mounting frame is connected to the busbar group, and a second portion of the mounting frame is used to connect to the drawer seat.

9. The busbar according to claim 1, characterized in that: The second ends of the plurality of busbars are each provided with a fastening hole; The fastening hole is used for fasteners to pass through so as to fix the external conductive member.

10. A drawer type circuit breaker, characterized in that: It comprises a drawer seat, a contact row, a circuit breaker body and a busbar as claimed in any one of claims 1 to 9; The circuit breaker body is slidably connected in the drawer seat; The first end of the contact row is connected to the first end of the bundle clamp, and the second end of the contact row is connected to the circuit breaker body; The first end of the busbar is connected to the second end of the beam clamp, and the second end of the busbar is connected to an external conductive member.

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