Bus duct plug-in device

Abstract

The application belongs to the technical field of power equipment, and discloses a bus duct plug-in device, which comprises a plug box, a plug-in box and a conductive contact piece; the plug box is used for being assembled on the shell of the bus duct; the plug-in box is provided with a grounding piece; the conductive contact piece is arranged on the grounding piece or the shell; when the plug-in box is plugged into the plug-in box, the grounding piece is abutted with the shell through the conductive contact piece; the side of the conductive contact piece in contact with the grounding piece is a first metal layer which is the same as the material of the grounding piece, the side of the conductive contact piece in contact with the shell is a second metal layer which is the same as the material of the shell, and the first metal layer and the second metal layer are different metals. The bus duct plug-in device can reduce the contact resistance of the contact surface between the grounding piece and the shell, ensure the reliability of grounding, effectively prevent the oxidation reaction of the grounding piece and the shell caused by the contact of different metals, and improve the long-term effectiveness of grounding.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, and specifically relates to a busbar trunking connection device. Background Technology

[0002] Busbar trunking, as a highly efficient power transmission and distribution device, is widely used in low-voltage power distribution systems in modern buildings, data centers, industrial plants, and other fields. It typically consists of a series of conductors (busbars) wrapped in insulating material, and is quickly electrically connected to a junction box via junction boxes installed on the side walls of the busbar trunking.

[0003] In the design and manufacturing of busbar systems, the grounding reliability between the junction box and the busbar is a core indicator concerning the safe operation of the entire system. Currently, the common grounding structure in the industry basically adopts three-phase five-wire busbars. In a three-phase five-wire busbar, the three-phase conductors, the neutral conductor (N), and the protective earth (PE) conductor are essentially isolated from the metal casing of the busbar. In existing technology, the metal casing of most busbars is not connected to the PE conductor, which means that the circuit breaker cannot operate quickly when a single-phase conductor is short-circuited to the metal casing.

[0004] In some existing busbar trunking systems, the PE grounding conductor appears to be connected to the metal casing and grounded through the metal casing. However, in reality, the connection is prone to unreliability. This can cause excessive heat when current flows through the casing to the ground, potentially melting the grounding structure and causing electric shock accidents. Furthermore, it is difficult to maintain long-term grounding continuity. Summary of the Invention

[0005] The purpose of this invention is to provide a busbar trunking plug-in device, wherein the grounding component of the plug-in box is connected to the outer casing and grounded through the outer casing, and has the characteristics of reliable connection and ability to maintain long-term continuous grounding.

[0006] The following technical solutions are used to achieve the above objectives.

[0007] The first aspect of the present invention provides a busbar trunking plug-in device, the busbar trunking plug-in device comprising a plug box, a plug-in housing, and a conductive contact; the plug box is used to be assembled on the outer shell of the busbar trunking; the plug box has a grounding component; the conductive contact is disposed on the grounding component or the outer shell; when the plug box is plugged into the plug box, the grounding component abuts against the outer shell through the conductive contact;

[0008] The side of the conductive contact that contacts the grounding component is a first metal layer made of the same material as the grounding component, and the side of the conductive contact that contacts the outer casing is a second metal layer made of the same material as the outer casing. The first metal layer and the second metal layer are made of different metals.

[0009] In some embodiments, the busbar trunking connection device further includes a pressing member with elastic properties; when the connection box is inserted into the socket, the pressing member acts on the grounding member or the conductive contact member, so that the conductive contact member is tightly pressed against the outer casing.

[0010] In some embodiments, the grounding member is at least partially a flexible and deformable structure, the conductive contact is connected to the grounding member, the pressing member is elastically disposed on the plug box, and the pressing member is disposed on the side of the grounding member opposite to the conductive contact.

[0011] In some embodiments, the grounding element includes a fixed section, a pressing section, and a connecting section; the fixed section is connected to the plug box, the pressing section has a long end and a short end connected to the long end, the long end is movably inserted through the plug box, the short end is located outside the plug box and connected to the conductive contact, and the pressing member is disposed on the side of the short end away from the conductive contact; the connecting section is a flexible and deformable structure, and the fixed section is connected to the long end through the connecting section;

[0012] And / or, the pressing member includes a fixed post and a first elastic member, the fixed post being connected to the plug-in box via the first elastic member;

[0013] And / or, both the grounding element and the conductive contact element are sheet-like structures.

[0014] In some embodiments, two conductive contacts are provided, and the two conductive contacts are disposed opposite to each other on the housing; the side of the two conductive contacts facing each other is the first metal layer, and the side facing away from each other is the second metal layer, and the first ends of the two conductive contacts are vertically disposed on the housing and cooperate to form an interface groove, and the second ends of the two conductive contacts are stacked on the housing. When the plug box is plugged into the plug box, the grounding member is plugged into the interface groove.

[0015] In some embodiments, the pressing member is an elastic sheet disposed on one side of at least one of the conductive contacts corresponding to the second metal layer, and the elastic sheet elastically presses against the first end of the conductive contact along the arrangement direction of the two conductive contacts;

[0016] And / or, the grounding element has a columnar structure, and the conductive contact element has a sheet-like structure.

[0017] In some embodiments, the first metal layer is a copper layer and the second metal layer is an aluminum layer.

[0018] In some embodiments, the plug box has an annular groove on the edge near the grounding member, and a sealing layer is provided in the annular groove. The plug box has an annular flange. When the plug box is plugged into the plug box, the plug box is connected and squeezed by the annular groove and the annular flange to form a sealed connection.

[0019] In some embodiments, the insert box includes a box body, a box cover, and a movable plate;

[0020] The box body is disposed on the outer shell, the box cover is detachably disposed on the box body, and the movable plate is located between the box cover and the box body; the box body is provided with a slot for inserting the box; the movable plate is movably disposed on the box body, and the movable plate has a first position and a second position relative to the box body. When the movable plate is in the first position, the movable plate covers the slot; when the movable plate is in the second position, the movable plate is offset relative to the slot, and the slot is exposed.

[0021] In some embodiments, the box body is provided with a positioning member with elastic properties, and the positioning member is at least partially exposed outside the box body in its normal state, and retracted inside the box body in its retracted state; the movable plate is provided with a first positioning hole and a second positioning hole; when the movable plate is in a first position, the first positioning hole is opposite to the positioning member, and the positioning member passes through the first positioning hole in its normal state; when the movable plate is in a second position, the second positioning hole is opposite to the positioning member, and the positioning member passes through the second positioning hole in its normal state.

[0022] In some embodiments, the first positioning hole and the second positioning hole are connected and a connecting channel is formed between the first positioning hole and the second positioning hole; the radial length of the positioning member is greater than the width of the connecting channel, and the radial length of the first positioning hole and the second positioning hole is greater than the radial length of the positioning member.

[0023] And / or, the box body is provided with a receiving groove; the positioning element includes a positioning post and a second elastic element, the positioning post is slidably disposed in the receiving groove, and the positioning post is connected to the box body through the second elastic element.

[0024] The technical solution provided by this invention has the following advantages and effects:

[0025] 1. This busbar trunking plug-in device incorporates a conductive contact between the grounding component and the outer casing of the plug-in box. The side of the conductive contact that contacts the grounding component has a first metal layer of the same material as the grounding component, while the side that contacts the outer casing has a second metal layer of the same material. This allows the grounding component of the plug-in box to directly contact the outer casing through the conductive contact, creating a tight conductive connection. This grounding is achieved through the outer casing. Furthermore, the structure of the conductive contact avoids direct contact between the grounding component and the outer casing, which are made of different metals. Instead, it creates indirect contact where both the grounding component and the conductive contact are made of the same material, and the outer casing is also made of the same material. This reduces the contact resistance between the grounding component and the outer casing, effectively preventing excessive heat generation during current flow to the ground, which could lead to the melting of the grounding structure and electric shock. It also effectively prevents oxidation caused by the contact between different metals, thus maintaining long-term grounding continuity. Therefore, this busbar trunking plug-in device features reliable and long-term stable grounding.

[0026] 2. When the plug box is installed on the socket, the grounding component or the conductive contact is subjected to a pressure-retaining component with certain elastic properties. The continuous elastic pressure provided by the pressure-retaining component increases the crimping force between the grounding component and the outer casing, making the electrical connection structure reliable and stable.

[0027] 3. When the conductive contact is fixed to the grounding component of the plug box, the pressing component is set on the side of the grounding component away from the conductive contact. Since the pressing component has a certain elastic stroke and the grounding component is at least partially a soft and deformable structure, it has a certain deformation performance. Thus, the continuous elastic pressing force provided by the pressing component, combined with the adaptive deformation capability of the soft grounding component, can increase the pressing force between the grounding component and the shell, making the electrical connection structure reliable and stable, and can also compensate for the error gaps in the installation of the plug box and the socket.

[0028] 4. When two conductive contacts are fixed on the housing and form an interface groove, an elastic sheet is elastically abutted against the conductive contacts along the arrangement direction of the two conductive contacts. This allows the elastic sheet to create a travel space for the conductive contacts to move closer to the other conductive contact. The space of the interface groove can adapt to the shape of the grounding component. Therefore, the elastic sheet can limit the two conductive contacts to make tight contact with the grounding component, making the electrical connection structure reliable and stable. It can also reduce the machining accuracy required for components as in traditional rigid connections, reduce production process requirements, and thus reduce production costs and scrap rate.

[0029] 5. This junction box features a movable plate that moves relative to the box body between the box body and the cover. By controlling the position of the movable plate relative to the box body, the position of the movable plate can be adjusted according to the working status of the busbar trunking. When the busbar trunking is operating normally and a junction box needs to be plugged in for power access, adjusting the movable plate to the second position causes the movable plate to be offset from the slot, exposing the slot for easy insertion of the junction box for power access. When the busbar trunking is operating normally but no junction box is plugged in, adjusting the movable plate to the first position blocks the slot, thus preventing the busbar conductive contacts from being exposed in the slot of the busbar junction box. This effectively prevents the conductive contacts on the outer casing from being exposed in the slot when no junction box is plugged in, thus avoiding the problem of accidental electric shock to operators, effectively improving the protection effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the busbar trunking connection device according to an embodiment of the present invention.

[0031] Figure 2 yes Figure 1 A partial structural diagram of the busbar trunking connection device.

[0032] Figure 3 This is a schematic diagram of the overall structure of the insert box according to an embodiment of the present invention.

[0033] Figure 4 yes Figure 3 An exploded view of the insert box.

[0034] Figure 5 This is a schematic diagram of the box lid according to an embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the structure of the insert box after removing the box cover and panel according to an embodiment of the present invention.

[0036] Figure 7 yes Figure 3 A cross-sectional structural diagram of the insert box.

[0037] Figure 8 This is a longitudinal cross-sectional structural schematic diagram of a busbar trunking connection device in one embodiment.

[0038] Figure 9 This is a longitudinal cross-sectional view of the partial structure of the plug-in box, showing the plug-in box and busbar trunking in a plug-in state.

[0039] Figure 10 yes Figure 8 A schematic diagram of the insertion structure of the grounding component and the conductive contact component.

[0040] Figure 11 This is a partial structural schematic diagram of the longitudinal section of the busbar trunking connection device in another embodiment.

[0041] Figure 12 yes Figure 11 An exploded view of the grounding components and conductive contacts.

[0042] Figure 13 yes Figure 11 A schematic diagram of the overall structure of the grounding component.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Busbar duct plug-in device;

[0045] 1. Insert box; 11. Box body; 111. Slot; 112. Receiving groove; 113. Guide groove; 114. Rotating hole; 115. Second locking hole; 116. Annular flange; 12. Box cover; 121. Rotating shaft; 122. Inclined surface; 123. First locking hole; 13. Movable plate; 131. First positioning hole; 132. Second positioning hole; 133. Connecting channel; 134. Guide component; 14. Positioning component; 141. Positioning post; 142. Second elastic component; 15. Panel; 21. Outer shell; 221. Conductive contact component; 2211. First metal layer; 2212. Second metal layer; 222. Conductive contact; 223. Pressing component; 2231. Fixing post; 2232. First elastic component;

[0046] 30. Plug box; 31. Phase wire plug; 32. Grounding component; 321. Fixing section; 322. Connecting section; 323. Pressing section; 324. Long end; 325. Short end; 203. Annular groove. Detailed Implementation

[0047] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0048] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0049] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the related listed items.

[0050] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0051] One embodiment of the present invention provides a busbar trunking plug-in device 100, such as... Figures 1 to 13As shown, the busbar trunking includes a junction box 1, a connector box 30, and a conductive contact 221. The junction box 1 is used to assemble onto the outer shell 21 of the busbar trunking. The connector box 30 has a grounding component 32. The conductive contact 221 is disposed on the grounding component 32 or the outer shell 21. When the connector box 30 is inserted into the junction box 1, the grounding component 32 abuts against the outer shell 21 through the conductive contact 221. It should be noted that the busbar trunking includes conventional components such as busbars and conductive contacts 222. The outer shell 21 covers the busbars. The busbar trunking has junction boxes 1 at the points where insertion is required, for the connector box 30 of the branch unit to contact and draw power.

[0052] The side of the conductive contact 221 that contacts the grounding component 32 is a first metal layer 2211 made of the same material as the grounding component 32, and the side of the conductive contact 221 that contacts the outer casing 21 is a second metal layer 2212 made of the same material as the outer casing 21. The first metal layer 2211 and the second metal layer 2212 are made of different metals. When power is drawn through the plug-in box 30, the plug-in box 30 is plugged into the plug box 1 to form an electrical connection with the busbar. At this time, the grounding component 32 of the plug-in box 30 directly abuts against the outer casing 21 through the conductive contact 221, forming a tight contact and thus achieving grounding through the outer casing 21. It should be noted that the grounding component 32 of the plug-in box 30 is generally made of copper, while the outer shell 21 is generally made of aluminum. Since they are different metal materials, when the grounding component 32 of the plug-in box 30 is directly in contact with the outer shell 21 to form a ground, the inventors discovered that this connection method has unreliable issues. Further research revealed that when the grounding component 32 and the outer shell 21 are in direct contact, on the one hand, the contact surface resistance between them is high, causing excessive heat generation when current flows through the outer shell 21 to the ground, which may melt the grounding structure and cause an electric shock accident. On the other hand, a chemical reaction easily occurs when they are in contact. Moisture in the air and impurities in the dust will form a thin layer of electrolyte solution on the contact surface, constituting a complete oxidation reaction. This causes the originally highly conductive aluminum surface to be covered with a high-resistivity aluminum oxide film. Aluminum oxide is an insulating material with extremely high resistivity, and this film will become thicker over time, affecting long-term grounding continuity.

[0053] Therefore, in this embodiment, a conductive contact 221 is provided between the grounding component 32 and the outer casing 21 of the plug-in box 30. The side of the conductive contact 221 that contacts the grounding component 32 is a first metal layer 2211 of the same material as the grounding component 32, specifically a copper metal layer of the same material as the grounding component 32. The side of the conductive contact 221 that contacts the outer casing 21 is a second metal layer 2212 of the same material as the outer casing 21, specifically an aluminum metal layer of the same material as the outer casing 21. That is, the conductive contact 221 is a conventional copper-aluminum composite plate structure, which avoids the copper... Instead of direct contact between aluminum components, the grounding component 32 and the conductive contact 221 are made of the same material, while the outer casing 21 and the conductive contact 221 are made of the same material, forming an indirect contact. This results in indirect contact between copper and aluminum, reducing the contact resistance between the grounding component 32 and the outer casing 21. This effectively prevents excessive heat generation when current flows through the outer casing 21 to the ground, which could lead to the melting of the grounding structure and electric shock. It also effectively prevents oxidation reactions caused by the contact between different metals of the grounding component 32 and the outer casing 21, thus maintaining long-term grounding continuity. Therefore, the busbar trunking plug-in device 100 has the characteristics of reliable grounding and long-term stable grounding.

[0054] In some embodiments, the busbar trunking connection device 100 further includes a pressing member 223. The pressing member 223 has elastic properties and acts on the grounding member 32 or the conductive contact 221, causing the conductive contact 221 to tightly abut against the outer casing 21. The elastic properties of the pressing member 223 allow it to elastically act on the grounding member 32 or the conductive contact 221 when the connection box 30 is inserted into the socket 1, ensuring a tight abutment between the conductive contact 221 and the outer casing 21. This increases the crimping force between the grounding member 32 and the outer casing 21, making the electrical connection reliable and stable.

[0055] In some implementations, such as Figures 11 to 13As shown, the grounding member 32 is at least partially a flexible and deformable structure, wherein the flexible and deformable structure is one that deforms under external force, such as an elastic body structure or a flexible body structure, without particular limitation. The conductive contact 221 is connected to the grounding member 32, and the pressing member 223 is elastically disposed on the plug box 30, and the pressing member 223 is disposed on the side of the grounding member 32 opposite to the conductive contact 221. Understandably, when the plug box 30 is installed onto the socket 1, one end of the grounding component 32 of the plug box 30, which is fixed with the conductive contact 221, abuts against the outer shell 21. Since the pressing component 223 is elastically disposed on the plug box 30 and is disposed on the side of the grounding component 32 away from the conductive contact 221, the pressing component 223 has a certain elastic stroke. Since the grounding component 32 is at least partially a soft and deformable structure, it has a certain deformation performance. Thus, the continuous elastic pressing force provided by the pressing component 223, combined with the adaptive deformation capability of the soft grounding component 32, can increase the pressing force between the grounding component 32 and the outer shell 21, making the electrical connection structure reliable and stable. At the same time, it can also compensate for the error gaps in the installation of the plug box 30 and the socket 1.

[0056] Specifically, in this embodiment, the grounding component 32 includes a fixed section 321, a connecting section 322, and a pressing section 323. The fixed section 321 is connected to the plug-in box 30. The pressing section 323 has a long end 324 and a short end 325 connected to the long end 324. The long end 324 is movably inserted through the plug-in box 30. The short end 325 is located outside the plug-in box 30 and is connected to the conductive contact 221. The pressing member 223 is disposed on the side of the short end 325 away from the conductive contact 221. The connecting section 322 is a flexible and deformable structure, and the fixed section 321 is connected to the long end 324 through the connecting section 322. It should be noted that the fixing section 321, the connecting section 322, and the pressing section 323 are different parts on the grounding component 32. The grounding component 32 is a copper busbar structure as a whole. The fixing section 321 and the pressing section 323 are both rigid copper busbar structures, while the connecting section 322 is a flexible and deformable copper busbar structure. Specifically, the connecting section 322 can be formed into a busbar by extruding multiple flexible and deformable thin copper busbars, while still maintaining good deformation ability, making the connecting section 322 a flexible and deformable structure. Specifically, the fixing segment 321 is a straight segment, which is laterally arranged inside the plug-in box 30. The connecting segment 322 is independently movable relative to the plug-in box 30, and in its normal state, the connecting segment 322 is inclined away from the outer shell 21 relative to the plug-in box 30. Therefore, there is sufficient deformation space between the bottom of the connecting segment 322 and the surface of the plug-in box 30, which allows the connecting segment 322 to adapt to the actual situation. The pressing segment 323 has an overall L-shaped structure. The plug-in box 30 has a through-hole. The long end 324 of the pressing segment 323 is movably inserted through the hole and extends outward from the plug-in box 30. The short end 325 of the pressing segment 323 is located outside the plug-in box 30 and is connected to the conductive contact 221. Therefore, the fixing segment 321, the connecting segment 322, and the pressing segment 323 are connected to form an approximately Z-shaped structure. The connecting section 322 is a flexible and deformable structure, which allows the pressing section 323 to have a certain travel space relative to the plug box 30. Through the elastic properties of the pressing member 223, the conductive contact 221 at the short end 325 of the pressing section 323 can be in close contact with the outer shell 21, making the electrical connection structure reliable and stable. It can also reduce the processing precision required for components as in traditional rigid connections, reduce production process requirements, and thus reduce production costs and scrap rate.

[0057] In a further implementation, such as Figure 11As shown, the pressing member 223 includes a fixing post 2231 and a first elastic member 2232. The fixing post 2231 is connected to the plug box 30 through the first elastic member 2232. Specifically, the plug box 30 is provided with a stepped square hole. The fixing post 2231 is a square post adapted to the stepped square hole and slides in the stepped square hole. The top of the fixing post 2231 has a groove, and the first elastic member 2232, such as a spring, is placed in the groove. A cover is installed above the spring. Under the action of the spring, the fixing post 2231 can generate elasticity to press against the short end 325 of the pressing section 323, so that the conductive contact 221 at the short end 325 of the pressing section 323 is in close contact with the outer shell 21.

[0058] In a further implementation, such as Figures 8 to 10 As shown, both the grounding component 32 and the conductive contact 221 are sheet-like structures, which makes the grounding component 32 and the conductive contact 221 in surface contact. The conductive contact 221 and the outer shell 21 are also in surface contact, which can increase the effective contact area and transform unstable point contact or line contact into stable surface contact.

[0059] In other implementations, such as Figure 9As shown, two conductive contacts 221 are provided, and the two conductive contacts 221 are disposed opposite to each other on the outer shell 21; the side facing each other of the two conductive contacts 221 is the first metal layer 2211, and the side facing away is the second metal layer 2212. The first ends of the two conductive contacts 221 are vertically disposed on the outer shell 21 and cooperate to form an interface groove. The second ends of the two conductive contacts 221 are stacked on the outer shell 21. When the plug box 30 is plugged into the plug box 1, the grounding member 32 is plugged into the interface groove. Specifically, the first metal layer 2211 is a copper metal layer of the same material as the grounding component 32, and the second metal layer 2212 is an aluminum metal layer of the same material as the outer shell 21. That is, the conductive contact 221 is a copper-aluminum composite material layer structure. The first ends of the two conductive contacts 221 are vertically arranged on the outer shell 21 and cooperate to form an interface groove. The second ends of the two conductive contacts 221 are stacked on the outer shell 21. That is, the second metal layer 2212 of the second end of one conductive contact 221 is in contact with the outer shell 21, and the first metal layer 2211 of the second end of the conductive contact 221 is in contact with the first metal layer 2211 of the second end of the other conductive contact 221, thus forming a stacked state. When the grounding component 32 is inserted into the interface slot, the grounding component 32 contacts the copper metal layer of the conductive contact 221, and the outer shell 21 contacts the aluminum metal layer of the conductive contact 221. Therefore, through the specific structural design of the conductive contact 221, direct contact between copper and aluminum is avoided, and instead, indirect contact between copper and copper and between aluminum and aluminum is achieved. This reduces the contact resistance of the contact surface between the grounding component 32 and the outer shell 21, thereby ensuring the reliability of grounding and the continuity of long-term grounding.

[0060] In some implementations, such as Figure 10As shown, the pressing member 223 is an elastic sheet disposed on the side of at least one of the conductive contacts 221 corresponding to the second metal layer 2212. The elastic sheet elastically presses against the first end of the conductive contact 221 along the arrangement direction of the two conductive contacts 221. It is possible that only one conductive contact 221 has an elastic sheet on the side corresponding to the second metal layer 2212, or both conductive contacts 221 may have elastic sheets on the side corresponding to the second metal layer 2212. The specific configuration can be determined according to actual needs, and no particular limitation is imposed here. Understandably, by elastically abutting against the first end of the conductive contact 221 along the arrangement direction of the two conductive contacts 221, the elastic sheet can form a travel space for the conductive contact 221 to move closer to the other conductive contact 221. This allows the space of the interface groove to adapt to the shape of the grounding member 32. Therefore, the elastic sheet can limit the two conductive contacts 221 to make close contact with the grounding member 32, making the electrical connection structure reliable and stable. It can also reduce the processing precision required for components as in traditional rigid connections, reduce production process requirements, and thus reduce production costs and scrap rate.

[0061] In some implementations, such as Figure 10 As shown, the grounding component 32 has a columnar structure, and the conductive contact 221 has a sheet-like structure, allowing the grounding component 32 to be smoothly inserted into the interface groove of the conductive contact 221. The sheet-like conductive contact 221 is bent in the middle to form a vertically positioned first end and a second end stacked on the outer casing 21. Furthermore, the sheet-like conductive contact 221 forms a bent structure corresponding to the position of the interface groove, thus creating a tapered shape at the opening of the interface groove, further improving the contact stability with the grounding component 32.

[0062] In some implementations, such as Figure 9 As shown, the plug-in box 30 has an annular groove 203 on its edge near the grounding component 32, and a sealing layer is provided at the annular groove 203. The plug box 1 has an annular flange 116. When the plug-in box 30 is plugged into the plug box 1, the plug-in box 30 is engaged with the annular groove 203 and the annular flange 116, and the sealing layer is pressed to form a sealed connection. Specifically, the sealing layer can be an elastic rubber strip, etc., so that the contact surface between the plug-in box 30 and the plug box 1 has good sealing performance when plugged in, which can form good protective performance and effectively prevent liquid or dust from entering.

[0063] In some implementations, such as Figures 1 to 7As shown, the insertion box 1 includes a box body 11, a box cover 12, and a movable plate 13. It should be noted that the insertion box 1 is installed on the outer casing 21 at the position corresponding to the conductive contact 222 of the busbar trunking, serving as a plug-in base for the power tapping point for the plug-in box 30 to tap and draw power. The box body 11 is disposed on the outer casing 21, and the box cover 12 is detachably disposed on the box body 11. The box cover 12 is used to protect the components inside the box body 11. When not tapping and drawing power, the box cover 12 can be closed to the top of the box body 11, thus forming a closed unit to protect the internal structure of the insertion box 1, preventing dust and liquid from entering. Furthermore, the box cover 12 can be locked when closed to the box body 11, ensuring that the insertion box 1 can only be opened by designated personnel, preventing accidental operation. The movable plate 13 is located between the cover 12 and the box body 11. The box body 11 is provided with a slot 111 for the insertion of the plug-in box 30. The movable plate 13 is movably disposed on the box body 11, and the movable plate 13 has a first position and a second position relative to the box body 11. When the movable plate 13 is in the first position, the movable plate 13 covers the slot 111. When the movable plate 13 is in the second position, the movable plate 13 is offset from the slot 111, and the slot 111 is exposed. The outer shell 21 is provided with conductive contacts 222 at the insertion points for the plug-in box 30 of the tapping unit to contact and draw power. The conductive contacts 222 are exposed on the outer shell 21. The box body 11 is detachably disposed on the outer shell 21, specifically through bolt connection, pin connection, snap-fit ​​connection, etc., or through a non-detachable fixed connection; no particular limitation is made here. Specifically in this embodiment, the box body 11 is detachably mounted on the outer shell 21. When the box body 11 is mounted on the outer shell 21, the conductive contact 222 is inserted into the slot 111. The phase wire pin 31 inside the plug box 30 makes reliable electrical contact with the exposed conductive contact 222, thereby completing the distribution of electrical energy.

[0064] Specifically, the box 11 is provided with multiple independently arranged square slots 111 that run vertically from the bottom upwards. When the box 1 is installed in the outer shell 21, the busbar conductive contacts 222 are located in the slots 111 of the box 11 and are separated from each other, thereby separating each conductive contact 222 by a sufficient distance to prevent short circuit. The method involves providing a movable plate 13 on the box body 11, which is movable relative to the box body 11. The box body 11 has a cuboid structure, and slots 111 are spaced apart along the length of the box body 11. The length of the movable plate 13 matches the length of the box body 11, but the width of the movable plate 13 is shorter than the width of the box body 11, allowing the movable plate 13 to move along the width of the box body 11. The difference between the width of the movable plate 13 and the width of the box body 11 should be greater than the width of the slots 111, so that the movable plate 13 can move to be offset from or block the slots 111. Specifically, in this embodiment, the width of the movable plate 13 is half the width of the box body 11, so that the movable plate 13 has sufficient space to move on the box body 11. By controlling the position of the movable plate 13 relative to the box 11, the position of the movable plate 13 can be adjusted according to the working state of the busbar trunking. When the busbar trunking needs to operate normally and the plug box 30 needs to be plugged in, the position of the movable plate 13 is adjusted to the second position. The movable plate 13 is offset from the slot 111, and the slot 111 is exposed. At this time, each conductive contact 222 on the outer shell 21 is exposed in the slot 111. The operator pushes the plug box 30 into the square slot 111 of the plug box 1. The phase wire pin 31 inside the plug box 30 makes reliable electrical contact with the exposed conductive contact 222, thereby completing the distribution of electrical energy. When the busbar trunking is operating normally but the plug box 30 is not plugged in, when the movable plate 13 is in the first position, the movable plate 13 covers the slot 111, thereby covering the conductive contact 222 to prevent it from being exposed in the slot 111 of the plug box 1. This effectively avoids the problem of the conductive contacts 222 on the outer shell 21 being exposed in the slot 111 when the plug box 30 is not plugged in, which could lead to accidental electric shock to the operator.

[0065] In some implementations, such as Figure 6 and Figure 7As shown, the housing 11 is provided with a positioning member 14 with elastic properties. The positioning member 14 is at least partially exposed outside the housing 11 in its normal state, and retracts into the housing 11 in its retracted state. The movable plate 13 is provided with a first positioning hole 131 and a second positioning hole 132. When the movable plate 13 is in the first position, the first positioning hole 131 is opposite to the positioning member 14, and the positioning member 14 normally passes through the first positioning hole 131. When the movable plate 13 is in the second position, the second positioning hole 132 is opposite to the positioning member 14, and the positioning member 14 normally passes through the second positioning hole 132. By providing the first positioning hole 131 and the second positioning hole 132 on the movable plate 13, the two positioning holes, in cooperation with the positioning member 14, can prevent the movable plate 13 from moving further when it moves to the first or second position, thereby allowing the movable plate 13 to move precisely to the position that blocks the slot 111 or exposes the slot 111. Understandably, when it is necessary to move the movable plate 13 from the blocked slot 111 state or to the exposed slot 111 state, that is, from the first position to the second position, the positioning member 14 is in the normal state and passes through the first positioning hole 131 to restrict the movement of the movable plate 13. Pressing the positioning member 14 causes it to be in a retracted state and retract into the box 11. At this time, the movable plate 13 can move towards the second position. When it is in place, the positioning member 14 is positioned opposite to the second positioning hole 132. The positioning member 14 returns to its normal state under its own elasticity and passes through the second positioning hole 132 to restrict the movement of the movable plate 13. Similarly, when moving the movable plate 13 from the second position to the first position, pressing the positioning member 14 and moving the movable plate 13 in the opposite direction will enable the movable plate 13 to move accurately to the position of the blocked slot 111 or the position of the exposed slot 111, and form a positioning indication.

[0066] In some implementations, such as Figure 6 As shown, the first positioning hole 131 and the second positioning hole 132 are connected, and a connecting channel 133 is formed between the first positioning hole 131 and the second positioning hole 132; the radial length of the positioning member 14 is greater than the width of the connecting channel 133, and the radial length of the first positioning hole 131 and the second positioning hole 132 is greater than the radial length of the positioning member 14. Understandably, the first positioning hole 131 and the second positioning hole 132 form a continuous hole structure resembling a dumbbell or racetrack through the connecting channel 133, and the diameter or the widest dimension of the positioning member 14 is greater than the width of the connecting channel 133 connecting the two positioning holes. This ensures that the positioning member 14 will not slide out of the connecting channel 133 during normal positioning, thus preventing it from affecting the limiting effect of the positioning hole on the positioning member 14, and enabling a smooth transition of the positioning member 14 between the two positioning holes, improving the smoothness of the position switching of the movable plate 13.

[0067] In some implementations, such as Figure 7 As shown, the box body 11 is provided with a receiving groove 112; the positioning member 14 includes a positioning post 141 and a second elastic member 142. The positioning post 141 is slidably disposed in the receiving groove 112, and the positioning post 141 is connected to the box body 11 through the second elastic member 142. The top of the box body 11 has a vertically extending, non-penetrating receiving groove 112. The positioning post 141 and the receiving groove 112 are tightly slidably engaged, allowing the positioning post 141 to slide linearly along the receiving groove 112, effectively preventing positional deviation during movement. Even if the movable plate 13 applies a non-perfectly vertical lateral force to the positioning post 141, the receiving groove 112 can effectively resist this lateral force, preventing the positioning post 141 from bending or jamming. The second elastic member 142, such as a spring, has one end abutting against the bottom of the receiving groove 112 and the other end abutting against the bottom of the positioning post 141. The compression or extension of the spring drives the positioning post 141 to slide directionally within the receiving groove 112. Specifically, in this embodiment, the bottom of the positioning post 141 is provided with a placement groove, one end of the spring is accommodated in the placement groove and connected to the bottom of the placement groove, thereby further ensuring that the spring is directionally compressed or extended.

[0068] In some implementations, such as Figure 4 As shown, the box body 11 is provided with a guide groove 113; the movable plate 13 is provided with a guide member 134 on the side near the box body 11, and the guide member 134 slides in the guide groove 113; or, the box body 11 is provided with a guide member 134; the movable plate 13 is provided with a guide groove 113 on the side near the box body 11, and the guide member 134 slides in the guide groove 113. The box body 11 and the movable plate 13, through the sliding cooperation of the guide member 134 and the guide groove 113, enable the movable plate 13 to slide linearly to a first position or a second position. Specifically, a guide groove 113 is formed on the housing 11 or the movable plate 13, and a guide member 134, such as a slider, rib, or bushing, with a shape matching the guide groove 113 is provided on the movable plate 13 or the housing 11. The guide member 134 is embedded in the guide groove 113, and there is a precise clearance fit between the two, which allows smooth sliding but restricts wobbling, thereby enabling the movable plate 13 to slide directionally to the first position or the second position, improving the accuracy of movement. Specifically, multiple guide members 134 can be provided as needed, and the number of guide grooves 113 corresponding to the number of guide members 134 is specific and not particularly limited here.

[0069] In some implementations, such as Figure 4As shown, the insert box 1 also includes a panel 15, which has a through hole adapted to the slot 111. The panel 15 is detachably mounted on the box body 11, and the movable plate 13 is disposed between the panel 15 and the box body 11. By mounting the panel 15 on the surface of the movable plate 13, the panel 15 can be secured to the box body 11 using a snap-fit ​​or similar structure, facilitating disassembly. The shape of the panel 15 is adapted to the shape of the box body 11, allowing it to cover the entire surface of the box body 11, exposing only the slot 111 while concealing the rest. Notably, the panel 15 also has notches corresponding to the two positioning holes and the connecting channel 133, allowing operators to visually observe the position of the movable plate 13. The panel 15 provides good protection when the lid 12 is open and also enhances aesthetics.

[0070] In some implementations, such as Figure 4 and Figure 5 As shown, one end of the box body 11 is provided with a rotating hole 114; one end of the box cover 12 is provided with a rotating shaft 121, which is rotatably inserted into the rotating hole 114, and one side of the rotating shaft 121 forms an inclined surface 122. The box cover 12 can slide along the extension direction of the inclined surface 122 to detach from or be assembled with the box body 11. Specifically, rotating holes 114 are provided on opposite sides of one end of the box body 11, and mounting portions are formed on opposite sides of one end of the box cover 12. The rotating shaft 121 is provided on one side of each of the two mounting portions, so that the box cover 12 can be rotatably connected with the box body 11 through the cooperation of the two rotating shafts 121 and the two rotating holes 114. The box cover 12 can rotate freely around the axis of the rotating shaft 121, realizing the switching from the closed state to the open state. Furthermore, by forming an inclined surface 122 on one side of the rotating shaft 121, specifically by forming an inclined surface 122 structure on the outer wall of the rotating shaft 121 near the outer surface of the lid 12, when the lid 12 rotates relative to the box body 11 to a certain angle, such as 45°, by applying force to the lid 12 along the extension direction of the inclined surface 122, the lid 12 can be quickly removed from the box body 11 or assembled to the box body 11 to form a quick-release structure.

[0071] In some implementations, such as Figure 3 and Figure 4As shown, the lid 12 has a first locking hole 123, and the box body 11 has a second locking hole 115. The lid 12 is sequentially connected to the first locking hole 123 and the second locking hole 115 via locking components to lock it to the box body 11. Specifically, the first locking hole 123 can be provided at the end of the lid 12 away from the rotating shaft 121, and the second locking hole 115 can be provided at the end of the box body 11 away from the rotating hole 114. The two locking holes are locked together by locking components such as conventional locks. It can be understood that when the lid 12 is closed on the box body 11, the box body 11 and the lid 12 form a closed unit, protecting the internal structure of the insert box 1 and preventing dust and liquid from entering. Furthermore, the lid 12 can be locked to the box body 11 by the locking components when closed, ensuring that the insert box 1 can only be opened by designated personnel, preventing accidental operation. In addition, the lid 12 can be further secured to the box body 11 by means of screws or bolts to form a threaded connection, thereby further improving the stability of the lid fit.

[0072] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A busway plug-in device, characterized by, The bus duct plug-in device comprises a plug box, a plug-in box and a conductive contact; the plug box is used for assembling on the shell of the bus duct; the plug-in box has a grounding piece; the conductive contact is arranged on the grounding piece or the shell; when the plug-in box is plugged into the plug box, the grounding piece is in contact with the shell through the conductive contact; One side of the conductive contact in contact with the grounding piece is a first metal layer made of the same material as the grounding piece, and the other side of the conductive contact in contact with the shell is a second metal layer made of the same material as the shell; the first metal layer and the second metal layer are made of different metals; The bus duct plug-in device further comprises a pressing piece, the pressing piece has elastic properties; when the plug-in box is plugged into the plug box, the pressing piece acts on the grounding piece or the conductive contact, so that the conductive contact is in close contact with the shell; The conductive contact is arranged in two, and the two conductive contacts are arranged opposite to each other on the shell; one side of the two conductive contacts facing each other is the first metal layer, and the other side is the second metal layer; and the first ends of the two conductive contacts are vertically arranged on the shell and cooperatively form an interface slot, and the second ends of the two conductive contacts are arranged on the shell in a stacked manner; when the plug-in box is plugged into the plug box, the grounding piece is plugged into the interface slot; The pressing piece is an elastic sheet arranged on the side of at least one conductive contact corresponding to the second metal layer, and the elastic sheet is elastically pressed against the first end of the conductive contact along the arrangement direction of the two conductive contacts; and / or the grounding piece has a columnar structure, and the conductive contact has a sheet-like structure.

2. Bus duct plug-in device, characterized in that The bus duct plug-in device comprises a plug box, a plug-in box and a conductive contact; the plug box is used for assembling on the shell of the bus duct; the plug-in box has a grounding piece; the conductive contact is arranged on the grounding piece or the shell; when the plug-in box is plugged into the plug box, the grounding piece is in contact with the shell through the conductive contact; One side of the conductive contact in contact with the grounding piece is a first metal layer made of the same material as the grounding piece, and the other side of the conductive contact in contact with the shell is a second metal layer made of the same material as the shell; the first metal layer and the second metal layer are made of different metals; The bus duct plug-in device further comprises a pressing piece, the pressing piece has elastic properties; when the plug-in box is plugged into the plug box, the pressing piece acts on the grounding piece or the conductive contact, so that the conductive contact is in close contact with the shell; The grounding piece is at least partially in a soft and deformable structure, the conductive contact is connected with the grounding piece, the pressing piece is elastically arranged on the plug-in box, and the pressing piece is arranged on the side of the grounding piece away from the conductive contact; The grounding piece comprises a fixed segment, a pressing segment and a connecting segment; the fixed segment is connected with the plug-in box; the pressing segment has a long end and a short end connected with the long end; the long end is movably arranged in the plug-in box; the short end is located outside the plug-in box and connected with the conductive contact piece; the pressing piece is arranged on the side of the short end away from the conductive contact piece; the connecting segment is a soft and deformable structure; and the fixed segment is connected with the long end through the connecting segment; and / or the pressing piece comprises a fixed column and a first elastic piece; the fixed column is connected with the plug-in box through the first elastic piece; and / or the grounding piece and the conductive contact piece are both in a sheet structure.

3. The busway plug-in assembly of claim 1 or 2, wherein, The first metal layer is a copper layer, and the second metal layer is an aluminum layer.

4. The busway plug-in assembly of claims 1 or 2, wherein, An annular groove is arranged at the edge of the side of the plug-in box close to the grounding piece; a sealing layer is arranged at the annular groove; an annular flange is arranged on the plug-in box; when the plug-in box is plugged into the plug-in box, the plug-in box is plugged into the plug-in box through the annular groove and the annular flange, and the sealing layer is extruded to form a sealed connection.

5. The busway plug-in assembly of claims 1 or 2, wherein, The plug-in box comprises a box body, a box cover and a movable plate. The box body is arranged on the shell; the box cover is detachably arranged on the box body; the movable plate is located between the box cover and the box body; the box body is provided with a plug-in slot for plugging in the plug-in box; the movable plate is movably arranged on the box body; the movable plate has a first position and a second position relative to the box body; when the movable plate is in the first position, the movable plate blocks the plug-in slot; when the movable plate is in the second position, the movable plate is offset relative to the plug-in slot, and the plug-in slot is in an exposed state.

6. The busway plug-in assembly of claim 5, wherein, The box body is provided with a positioning piece having elastic properties; at least part of the positioning piece is exposed outside the box body in a normal state; the positioning piece is retracted into the box body in a retracted state; the movable plate is provided with a first positioning hole and a second positioning hole; when the movable plate is in the first position, the first positioning hole is arranged opposite the positioning piece, and the positioning piece is arranged in the first positioning hole in a normal state; when the movable plate is in the second position, the second positioning hole is arranged opposite the positioning piece, and the positioning piece is arranged in the second positioning hole in a normal state.

7. The busway plug-in assembly of claim 6, wherein, The first positioning hole and the second positioning hole are arranged in communication, and a communication channel is formed between the first positioning hole and the second positioning hole; the radial length of the positioning piece is greater than the width of the communication channel; the radial length of the first positioning hole and the second positioning hole is greater than the radial length of the positioning piece.

8. The busway plug-in assembly of claim 6, wherein, The box body is provided with a receiving groove; the positioning piece comprises a positioning column and a second elastic piece; the positioning column is slidably arranged in the receiving groove; and the positioning column is connected with the box body through the second elastic piece.

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