A cable junction box based on a sulfur hexafluoride ring main unit

Abstract

This utility model relates to a junction box, specifically a cable junction box based on a sulfur hexafluoride ring main unit, including an outdoor switch box and a gas box placed inside it. A base plate is installed inside the outdoor switch box, and the gas box is fixed to the base plate by a mounting bracket. Multiple inlet-side cable front plugs and multiple outlet-side cable front plugs are respectively provided on the inlet and outlet sides of the gas box, and these plugs are electrically connected to the copper busbars inside the gas box. It also includes inlet-side cable rear plugs and outlet-side cable rear plugs, which respectively plug into and mate with the inlet-side and outlet-side cable front plugs, and are connected to cables. The inlet-side cable front plugs and inlet-side cable rear plugs form a double-sleeve plug-in structure, and the outlet-side cable front plugs and outlet-side cable rear plugs also form a double-sleeve plug-in structure, facilitating plug-in and effectively improving safety during the plug-in process.

Description

Technical Field

[0001] This utility model relates to a junction box, specifically a cable junction box based on a sulfur hexafluoride ring main unit. Background Technology

[0002] A cable junction box is a device used to split, branch, connect, and switch circuits in cable lines. Most are used outdoors. Cable junction boxes are classified into two main categories based on their electrical structure: one type contains no switching equipment, only accessories for processing and connecting cable ends; it has a relatively simple structure, small size, and single function, and can be called a standard junction box. The other type contains not only the accessories of a standard junction box but also one or more switching devices; its structure is more complex, larger size, more connecting components, more difficult to manufacture, and more expensive, and can be called a high-end junction box.

[0003] Cable junction boxes are widely used in ring main units, such as sulfur hexafluoride ring main units.

[0004] Older junction boxes have a high failure rate (such as condensation short circuits). Older cable junction boxes pose significant safety problems because they lack internal switches and rely solely on cable plugs for interconnection. If an electrician unknowingly misoperates the plugs, "operation under load" can occur, leading to an explosion, which is extremely dangerous. Utility Model Content

[0005] The purpose of this invention is to provide a cable junction box based on a sulfur hexafluoride ring main unit to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cable junction box based on a sulfur hexafluoride ring main unit, comprising an outdoor switch box and a gas box placed therein; a base plate is installed on the inner side of the outdoor switch box, and the gas box is fixed to the base plate by a mounting bracket; multiple inlet-side cable front plugs and multiple outlet-side cable front plugs are respectively provided on the inlet-side and outlet-side of the gas box, and the inlet-side and outlet-side cable front plugs are electrically connected to the copper busbar inside the gas box; it also includes inlet-side cable rear plugs and outlet-side cable rear plugs that are respectively plugged into and cooperate with the inlet-side and outlet-side cable front plugs, and cables are connected to the inlet-side and outlet-side cable rear plugs.

[0007] As described above, the cable junction box based on the sulfur hexafluoride ring main unit has an inlet-side cable fixing bracket and an outlet-side cable fixing bracket installed on the bottom plates located on both sides of the gas box. The cable passes through the cable inlet hole on the bottom plate and is connected to the inlet-side cable plug, and is fixed by the inlet-side cable fixing bracket. The cable connected to the outlet-side cable plug is led out from the cable outlet hole formed on the bottom plate and is fixed by the outlet-side cable fixing bracket.

[0008] As described above, the cable distribution box based on the sulfur hexafluoride ring main unit is equipped with surge arresters on the front plug of the incoming cable, the front plug of the outgoing cable, the rear plug of the incoming cable, and the rear plug of the outgoing cable.

[0009] As described above, the cable junction box based on the sulfur hexafluoride ring main unit is equipped with a circuit breaker switch on the side of the gas box for protection against the on / off of the copper busbars inside the gas box. The circuit breaker switch can be controlled by the circuit breaker operating mechanism installed inside the gas box to achieve active on / off switching.

[0010] As described above, the cable junction box based on the sulfur hexafluoride ring main unit has a current transformer bracket installed on the top of the gas box for supporting the current transformer.

[0011] As described above, the cable junction box based on the sulfur hexafluoride ring main unit also has a battery installed on the base plate.

[0012] As described above, the cable junction box based on the sulfur hexafluoride ring main unit has a front door, a rear door panel, and two side door panels hinged to its four sides. The rear door panel and the two side door panels are locked to the outdoor switch box from the inside by a bolt lock. The front door is a double door and is locked by an external lock.

[0013] As described above, the cable junction box based on the sulfur hexafluoride ring main unit has a cover plate hinged to both sides facing the front door of the outdoor switch box. The cover plate is locked to the side wall of the outdoor switch box by an electric lock, and the latch lock is exposed when the cover plate is opened.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the front plug of the incoming cable and the rear plug of the incoming cable form a double sleeve plug-in structure, and the front plug of the outgoing cable and the rear plug of the outgoing cable form a double sleeve plug-in structure, which facilitates plugging and can effectively improve the safety during the plugging process.

[0015] Secondly, this embodiment is equipped with multiple incoming and outgoing terminals. In actual use, it can realize free combinations of incoming and outgoing lines such as one incoming and one outgoing, one incoming and two outgoing, one incoming and three outgoing, one incoming and four outgoing, two incoming and two outgoing, two incoming and three outgoing, two incoming and four outgoing, three incoming and three outgoing, and three incoming and four outgoing. This effectively realizes the flexible use of the junction box and improves the applicability of the junction box.

[0016] By combining the above-mentioned cable entry directions (entry and exit from the side of the outdoor switch box), it is ensured that the outdoor switch box is in a de-energized state when the operator operates the cable plug on the inlet side and the cable plug on the outlet side, thereby further improving the safety of operation. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a cable junction box based on a sulfur hexafluoride ring main unit;

[0018] Figure 2 This is a front view of a cable distribution box based on a sulfur hexafluoride ring main unit.

[0019] Figure 3 This is a schematic diagram of the internal structure of a cable junction box based on a sulfur hexafluoride ring main unit.

[0020] Figure 4 This is a front view of the internal structure of a cable junction box based on a sulfur hexafluoride ring main unit.

[0021] Figure 5 This is a schematic diagram of the internal structure of a cable junction box based on a sulfur hexafluoride ring main unit from another angle.

[0022] Figure 6 This is a schematic diagram of the gas box structure in the cable junction box based on a sulfur hexafluoride ring main unit;

[0023] Figure 7 This is a front view of the gas box in a cable junction box based on a sulfur hexafluoride ring main unit;

[0024] Figure 8 This is a side view of the gas box in a cable junction box based on a sulfur hexafluoride ring main unit.

[0025] Figure 9 This is a schematic diagram of the internal structure of the gas box in the cable junction box based on a sulfur hexafluoride ring main unit;

[0026] Figure 10 This is a schematic diagram showing the connection status of the copper busbar inside the gas box of the cable junction box based on sulfur hexafluoride ring main unit with the front plug of the incoming cable and the front plug of the outgoing cable.

[0027] Figure 11 This is a schematic diagram of the internal copper busbar structure of the gas box in the cable junction box based on a sulfur hexafluoride ring main unit.

[0028] Figure 12 This is a schematic diagram showing the state of the outdoor switch box in the cable distribution box based on the sulfur hexafluoride ring main unit after the front door, side door, and rear door are opened.

[0029] Figure 13 This is a schematic diagram showing the outdoor switch box in the cable distribution box based on the sulfur hexafluoride ring main unit at another angle after the front door, side door, and rear door are opened.

[0030] Figure 14 This is a schematic diagram showing the connection status between the cover plate of the cable junction box and the outdoor switch box based on the sulfur hexafluoride ring main unit.

[0031] Figure 15This is a schematic diagram of the internal structure of the outdoor switch box after the cover is opened in the cable junction box based on a sulfur hexafluoride ring main unit.

[0032] In the diagram: 101-Outdoor switch box, 1001-Battery, 1002-Base plate, 1003-Zero-sequence current transformer mounting bracket, 1004-Incoming cable fixing bracket, 1005-Current transformer bracket, 1006-Secondary compartment, 1007-Mechanism control panel, 1008-Outgoing cable fixing bracket, 1009-Cable outlet hole, 1010-Cable inlet hole, 1011-Front door, 10111-External lock, 1012-Side door panel, 101 3-Rear door panel, 1014-Lock lock, 1015-Electrically controlled lock, 1016-Cover plate; 201-Gas box, 2001-Rear plug of incoming cable, 2002-Front plug of incoming cable, 2003-Surge arrester, 2004-Gas box body, 2005-Front plug of outgoing cable, 2006-Rear plug of outgoing cable, 2007-Copper busbar inside the gas box, 2008-Circuit breaker switch, 2009-Circuit breaker operating mechanism, 2010-Gas pressure gauge. Detailed Implementation

[0033] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0034] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0035] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0036] Please see Figures 1-9In this embodiment of the present invention, a cable junction box based on a sulfur hexafluoride ring main unit includes an outdoor switch box 101 and a gas box 201 placed therein; a base plate 1002 is installed on the inner side of the outdoor switch box 101, and the gas box 201 is fixed on the base plate 1002 by a mounting bracket; multiple inlet-side cable front plugs 2002 and multiple outlet-side cable front plugs 2005 are respectively provided on the inlet-side and outlet-side sides of the gas box 201, and the inlet-side cable front plugs 2002 and outlet-side cable front plugs 2005 are electrically connected to the copper busbar 2007 inside the gas box 201; it also includes an inlet-side cable rear plug 2001 and an outlet-side cable rear plug 2006 that are respectively plugged into and cooperate with the inlet-side cable front plugs 2002 and outlet-side cable front plugs 2005, and cables are connected to the inlet-side cable rear plugs 2001 and outlet-side cable rear plugs 2006.

[0037] It should be noted that the front plug 2002 and the rear plug 2001 of the incoming cable form a double-sleeve plug-in structure, and the front plug 2005 and the rear plug 2006 of the outgoing cable form a double-sleeve plug-in structure, which facilitates plugging and effectively improves the safety during the plugging process.

[0038] A live indicator is installed between the front plug 2002 and the rear plug 2001 of the incoming cable and between the front plug 2005 and the rear plug 2006 of the outgoing cable, to indicate the live state when the incoming and outgoing ends are connected.

[0039] The multiple incoming cable front plugs 2002 and multiple outgoing cable front plugs 2005 are double-through sleeves.

[0040] Secondly, please refer to Figures 10-11 This embodiment is equipped with multiple incoming and outgoing terminals. In actual use, it can realize free combinations of incoming and outgoing lines such as one incoming and one outgoing, one incoming and two outgoing, one incoming and three outgoing, one incoming and four outgoing, two incoming and two outgoing, two incoming and three outgoing, two incoming and four outgoing, three incoming and three outgoing, and three incoming and four outgoing. This effectively realizes the flexible use of the junction box and improves the applicability of the junction box.

[0041] To elaborate further, please refer to Figures 3-5 On the bottom plates 1002 located on both sides of the air box 201, there are cable fixing brackets 1004 on the inlet side and cable fixing brackets 1008 on the outlet side respectively. The cable passes through the cable inlet hole 1010 on the bottom plate 1002 and is connected to the cable plug 2001 on the inlet side, and is fixed by the cable fixing bracket 1004 on the inlet side. The cable connected to the cable plug 2006 on the outlet side is led out from the cable outlet hole 1009 formed on the bottom plate 1002 and is fixed by the cable fixing bracket 1008 on the outlet side.

[0042] The cable fixing brackets 1004 on the inlet side and 1008 on the outlet side are set to effectively organize and fix the cables on the inlet and outlet sides, eliminating the problem of messy cables. Specifically, the cable fixing brackets 1004 on the inlet side and 1008 on the outlet side have the same structure, each including at least two vertical frames and multiple horizontal frames installed between the two vertical frames. Clamping devices such as clamps can be set on the horizontal frames to effectively fix the cables.

[0043] Please see Figure 6 Surge arresters 2003 are installed on the incoming cable front plug 2002, the outgoing cable front plug 2005, the incoming cable rear plug 2001, and the outgoing cable rear plug 2006, thereby achieving effective protection for the connection between the incoming cable front plug 2002 and the incoming cable rear plug 2001, and between the outgoing cable front plug 2005 and the outgoing cable rear plug 2006.

[0044] Please see Figures 7-9 The side end of the gas box 201 is also provided with a circuit breaker switch 2008 for protecting the copper busbar 2007 inside the gas box from switching on and off. The circuit breaker switch 2008 can be controlled by the circuit breaker operating mechanism 2009 provided in the gas box 201 to achieve active switching.

[0045] In this embodiment, the circuit breaker switch 2008 is configured to provide effective protection when the operator performs the tapping operation. The circuit breaker operating mechanism 2009 is configured to actively control the circuit breaker switch 2008, which allows the operator to actively disconnect the power, thereby enabling non-energized operation and improving the safety of the tapping process.

[0046] It should be noted that the gas box 201 includes a gas box body 2004, and the internal copper busbar 2007 is placed inside the gas box body 2004. The circuit breaker switch 2008 and the circuit breaker operating mechanism 2009 are placed inside the mechanism control panel 1007 on the side of the gas box body 2004. A secondary chamber 1006 is provided below the mechanism control panel 1007. The secondary chamber 1006 provides the arrangement of secondary circuit devices for the entire circuit.

[0047] A pressure gauge 2010 is installed on the gas box body 2004. The pressure gauge 2010 is used to detect the air pressure inside the gas box body 2004, thereby achieving the function of safety monitoring.

[0048] The top of the gas box 201 is equipped with a current transformer bracket 1005 for supporting the current transformer.

[0049] A battery 1001 is also installed on the base plate 1002. The battery 1001 draws power from a voltage transformer installed on the base plate 1002. When the line suddenly loses power, the battery 1001 can provide temporary power.

[0050] The base plate 1002 is also equipped with a zero-sequence current transformer mounting bracket 1003 for supporting the zero-sequence current transformer.

[0051] Please see Figures 12-15 The outdoor switch box 101 is hinged to a front door 1011, a rear door panel 1013, and two side door panels 1012 on its four sides. The rear door panel 1013 and the two side door panels 1012 are locked to the outdoor switch box 101 from the inside by a bolt lock 1014. The front door 1011 is a double door and is locked by an outward lock 10111.

[0052] The outdoor switch box 101 has cover plates 1016 hinged to both ends facing the front door 1011. The cover plates 1016 are locked to the side wall of the outdoor switch box 101 by an electric lock 1015. When the cover plates 1016 are opened, the bolt lock 1014 is exposed.

[0053] In this embodiment, when opening the outdoor switch box 101, the front door 1011 can only be opened via the external unlocking 10111. When it is necessary to open the side door panel 1012 or the rear door panel 1013, the outdoor switch box 101 needs to be powered off before it can be opened from the inside. Specifically, after opening the front door 1011, the outdoor switch box 101 is powered off. When the electric lock 1015 receives the power outage signal, the electric lock 1015 opens. At this time, the operator manually opens the cover 1016, thereby exposing the bolt lock 1014 on the side door panel 1012. The operator manually opens the bolt lock 1014 from the outside of the outdoor switch box 101, thereby opening the side door panel 1012. After the side door panel 1012 is opened, the bolt lock 1014 on the rear door panel 1013 is exposed. The operator opens the rear door panel 1013 from the inside of the outdoor switch box 101, thereby achieving safe operation.

[0054] By combining the above-mentioned cable entry direction (entry and exit from the side of the outdoor switch box 101), it is ensured that the outdoor switch box 101 is in a de-energized state when the operator operates the cable plug 2001 on the entry side and the cable plug 2006 on the exit side, thereby further improving the safety of operation.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable junction box based on a sulfur hexafluoride ring main unit, comprising an outdoor switch box (101) and a gas box (201) disposed therein; characterized in that, The outdoor switch box (101) is equipped with a base plate (1002) on its inner side, and the gas box (201) is fixed on the base plate (1002) by a mounting bracket; the gas box (201) is provided with multiple inlet cable front plugs (2002) and multiple outlet cable front plugs (2005) on its inlet and outlet sides respectively, and the inlet cable front plugs (2002) and outlet cable front plugs (2005) are electrically connected to the copper busbars (2007) inside the gas box (201); it also includes inlet cable rear plugs (2001) and outlet cable rear plugs (2006) that are respectively plugged into the inlet cable front plugs (2002) and outlet cable front plugs (2005), and cables are connected to the inlet cable rear plugs (2001) and outlet cable rear plugs (2006).

2. The cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, On the bottom plates (1002) located on both sides of the air box (201), there are cable fixing brackets (1004) on the inlet side and cable fixing brackets (1008) on the outlet side respectively. The cable passes through the cable inlet hole (1010) on the bottom plate (1002) and is connected to the cable plug (2001) on the inlet side, and is fixed by the cable fixing bracket (1004). The cable connected to the cable plug (2006) on the outlet side is led out from the cable outlet hole (1009) formed on the bottom plate (1002) and is fixed by the cable fixing bracket (1008).

3. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, Surge arresters (2003) are installed on the incoming cable front plug (2002), the outgoing cable front plug (2005), the incoming cable rear plug (2001), and the outgoing cable rear plug (2006).

4. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, The side end of the gas box (201) is also provided with a circuit breaker switch (2008) for protecting the copper busbar (2007) inside the gas box from switching on and off. The circuit breaker switch (2008) can be controlled by a circuit breaker operating mechanism (2009) provided in the gas box (201) to achieve active switching on and off.

5. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, The top of the gas box (201) is equipped with a current transformer bracket (1005) for supporting the current transformer.

6. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, A battery (1001) is also installed on the base plate (1002).

7. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 1, characterized in that, The outdoor switch box (101) is hinged to a front door (1011), a rear door panel (1013), and two side door panels (1012) on its four sides respectively; the rear door panel (1013) and the two side door panels (1012) are locked to the outdoor switch box (101) on the inside by a bolt lock (1014); the front door (1011) is a double door and is locked by an external lock (10111).

8. A cable junction box based on a sulfur hexafluoride ring main unit according to claim 7, characterized in that, The outdoor switch box (101) has cover plates (1016) hinged to both ends facing the front door (1011). The cover plates (1016) are locked to the side wall of the outdoor switch box (101) by an electric lock (1015). When the cover plates (1016) are opened, the bolt lock (1014) is exposed.

Images