Gas tank and ring main unit

Abstract

The utility model relates to the technical field of power supply equipment, and discloses a gas tank and a ring main unit. The ring main unit comprises a gas tank, the gas tank comprises a first functional unit, a second functional unit, three-phase buses and an insulating supporting piece, the two ends of each phase of bus are connected with the first functional unit and the second functional unit respectively, and a first installation part is arranged in the middle of the insulating supporting piece in the arrangement direction of the three-phase buses at the corresponding positions. Second mounting parts are arranged at the two ends respectively, the first mounting parts are matched and connected with the bus located in the middle, and the second mounting parts are matched and connected with the buses located at the ends. According to the gas tank and the ring main unit, when short-time withstand current and peak withstand current exist in the gas tank and the ring main unit, the bus is not easy to deform or ablate, and the gas tank and the ring main unit are simple in structure and convenient for spatial arrangement.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply equipment, in particular to a gas box and a ring network cabinet. Background Art

[0002] At present, with the improvement of the quality of urban industrial and urban life electricity consumption, the ring network power supply mode has been widely used due to its advantages of stable and reliable gas power supply quality. Among them, the ring network cabinet is one of the main equipment of the ring network power supply mode. The ring network cabinet usually includes a gas box, a mechanism room and a cable room. Some ring network cabinets have two or more functional units (the functional units can be cable lifting units, circuit breaker units, etc.) set in the gas box, thus forming a common box room ring network cabinet.

[0003] The three-phase lines of the two functional units in the gas box of the ring main unit in the common box room need to be connected through the busbar respectively. Due to the long length of the busbar, when there is a short-time withstand current and a peak withstand current in the gas box, the busbar is prone to deformation, contact point burning and other problems under the action of electric force. In some solutions, insulators are set in the gas box to support the busbar to prevent deformation of the busbar or contact point burning, but due to the arrangement of components in the gas box, the installation space of the insulator is limited and difficult to install, and the assembly of many components is cumbersome.

[0004] Therefore, there is an urgent need for a gas box and a ring main unit to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide an air box, in which when there are short-time withstand current and peak withstand current, the busbar is not easy to be deformed or ablated, and the structure is simple and convenient for space arrangement.

[0006] Another object of the utility model is to provide a ring main unit, which is easy to assemble and space layout by providing the above-mentioned gas box.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The gas box includes a first functional unit, a second functional unit, a three-phase busbar and an insulating support. The two ends of the busbar of each phase are respectively connected to the first functional unit and the second functional unit. Along the arrangement direction of the three-phase busbars at corresponding positions, a first mounting portion is provided in the middle of the insulating support, and second mounting portions are respectively provided at both ends. The first mounting portion cooperates with and is connected to the busbar located in the middle, and the second mounting portion cooperates with and is connected to the busbar located at the end.

[0009] As an optional solution, the insulating support member is a rod, and a groove is provided in the middle of the side surface, the groove constitutes the first mounting portion, and the busbar located in the middle is plugged into and matched with the groove;

[0010] Slots are respectively arranged on the end surfaces of both ends of the insulating support, and the slots constitute the second mounting portion. The busbars located at the ends are plugged into and matched with the corresponding slots.

[0011] As an optional solution, a first locking hole is provided at the bottom of the groove, and a first fastener penetrates the first locking hole and the corresponding busbar, and connects the corresponding busbar to the insulating support member; and / or

[0012] A second locking hole is arranged on the side wall of the slot, and a second fastener penetrates the second locking hole and the corresponding busbar, and connects the corresponding busbar to the insulating support.

[0013] As an optional scheme, the first functional unit is a cable lifting unit, and the second functional unit is a vacuum circuit breaker unit. The busbar of each phase includes a first docking section connected to the cable lifting unit and a second docking section connected to the vacuum circuit breaker unit. The three first docking sections are parallel to each other and extend along the first direction, and the three first docking sections constitute the corresponding parts and are arranged along the second direction; the three second docking sections are parallel to each other and extend along the second direction, and the three second docking sections constitute the corresponding parts and are arranged along the third direction.

[0014] As an optional solution, the three-phase busbars all include connecting sections, the three-phase connecting sections are arranged along a third direction and constitute the corresponding parts, the connecting sections located in the middle along the third direction and the connecting sections located at both ends are staggered in a second direction, and the second direction is perpendicular to the third direction; the insulating support member includes:

[0015] A main body, two ends of which constitute the second mounting portion and are respectively abutted against and connected to the connecting sections at the two ends;

[0016] A support portion protrudes from the side of the main body and is connected to the middle of the main body. The support portion constitutes the first mounting portion and is abutted against and connected to the connecting section located in the middle.

[0017] As an optional solution, the support portion is an insulating rod, and the third fastener is sequentially passed through the main body, the insulating rod and the connecting section in the middle, so that the connecting section in the middle is connected to the insulating support member; or

[0018] The support portion is constructed as a U-shaped insulating plate, and two side walls of the U-shaped insulating plate are respectively connected to the connecting section and the main body located in the middle through fourth fasteners.

[0019] As an optional solution, the busbar of each phase further includes a first docking section and a second docking section respectively connected to the first functional unit and the second functional unit, the first docking section and the second docking section both extend along the second direction, and the connecting section extends along the first direction and connects the first docking section and the second docking section;

[0020] Among the first connecting sections of the three phases, an extending direction of the first connecting section of one phase is opposite to an extending direction of the first connecting sections of the other two phases.

[0021] As an optional solution, the second functional unit is a vacuum circuit breaker unit, the vacuum circuit breaker unit includes a vacuum circuit breaker body and a disconnector body, the vacuum circuit breaker body includes: a circuit breaker control unit and an arc extinguishing chamber moving end conductor located at the upper part, an arc extinguishing chamber static end conductor located at the lower part, and three soft connection conductors respectively connected to the arc extinguishing chamber moving end conductor, the disconnector body is located below the arc extinguishing chamber static end conductor and connected to the arc extinguishing chamber static end conductor;

[0022] The three soft connection conductors are arranged along the front-to-back direction, and the three-phase busbars are respectively connected to the three soft connection conductors.

[0023] A ring main unit comprises a mechanism room, a cable room and the gas box, wherein the mechanism room is arranged at the front side of the gas box, and the cable room is arranged below the mechanism room.

[0024] As an optional solution, the first functional unit is a cable lifting unit, and the second functional unit is a vacuum circuit breaker unit.

[0025] The cable chamber comprises a first cable chamber, the cable lifting unit is connected to the cables in the first cable chamber, the first cable chamber is provided with a first door, a first lock is provided at a position in the mechanism chamber corresponding to the first cable chamber, and the first lock is configured to unlock the first door when the cables in the first cable chamber are not charged;

[0026] The cable chamber also includes a second cable chamber, the vacuum circuit breaker unit is connected to the cables in the second cable chamber, the second cable chamber is provided with a second door body, a second lock is provided at a position corresponding to the second cable chamber in the mechanism chamber, the second lock is used to lock the second door body, and the second lock is configured to unlock the second door body when the vacuum circuit breaker unit is in a grounded state.

[0027] The beneficial effects of the utility model are:

[0028] In the air box of the utility model, the first mounting portion in the middle of the insulating support member cooperates with and is connected to the busbar located in the middle, and the second mounting portions at both ends of the insulating support member cooperate with and are connected to the busbars located at both ends respectively, that is, the connection of the three-phase busbars is realized through one insulating support member, and the three-phase busbars are supported and strengthened, thereby being able to eliminate the problems of busbar deformation and contact point ablation caused by inter-phase electromotive force, with fewer parts and convenient assembly, and the insulating support member connected between the three-phase busbars will not interfere with the positions of other components inside the air box; in addition, the first mounting portion and the second mounting portion with different structures are arranged on the insulating support member, so that it can cooperate well with the busbar located in the middle of the arrangement direction and the busbars located at both ends of the arrangement direction, thereby improving the assembly convenience of the insulating support member and the reliability of cooperation with the busbar.

[0029] The ring network cabinet of the utility model is provided with the above-mentioned gas box, so that the busbar is not easy to be deformed or ablated, and has a long service life; it is easy to assemble and facilitate space layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axonometric diagram of a ring main unit provided by a specific implementation method of the utility model;

[0031] Figure 2 It is a front view of the ring main unit provided by the specific implementation mode of the utility model;

[0032] Figure 3 It is a cross-sectional view of the ring main unit provided by the specific implementation mode of the utility model at the mechanism room and the cable room;

[0033] Figure 4 This is a schematic diagram of the internal structure of the first air box provided by the specific implementation method of the utility model;

[0034] Figure 5 It is a structural schematic diagram of a vacuum circuit breaker unit provided in a specific embodiment of the utility model;

[0035] Figure 6 It is a structural schematic diagram of the second lock and the first lock provided by the specific implementation mode of the utility model;

[0036] Figure 7 It is a structural schematic diagram of a first insulating support member provided by a specific embodiment of the utility model;

[0037] Figure 8 It is a schematic diagram of the internal structure of the second air box provided by the specific implementation mode of the utility model;

[0038] Fig. 9 yes Figure 8 A schematic diagram of the structure of the insulating support and the busbar;

[0039] Fig.10 It is a schematic diagram of the internal structure of a third type of air box provided by a specific embodiment of the utility model;

[0040] Fig.11 yes Fig.10 A schematic diagram of the structure of the insulating support and the busbar;

[0041] Fig.12 It is a structural schematic diagram of another insulating support member and busbar provided by a specific embodiment of the utility model;

[0042] Fig.13 yes Fig.10 A schematic diagram of the structure of the insulating support member;

[0043] Fig.14 It is a schematic diagram of the internal structure of a fourth air box provided by a specific embodiment of the utility model;

[0044] Fig.15 yes Fig.14 Schematic diagram of the structure of the insulating support.

[0045] In the figure:

[0046] 10. Air box;

[0047] 11. Vacuum circuit breaker unit; 111. Vacuum circuit breaker body; 1111. Circuit breaker control unit; 1112. Arc extinguishing chamber moving end conductor; 1113. Arc extinguishing chamber static end conductor; 1114. Flexible connection conductor; 1115. Housing; 112. Disconnector body; 1121. Connecting contact; 1122. Moving knife switch; 1123. Knife switch seat; 1124. Grounding contact; 113. Cable outlet bushing;

[0048] 12. Cable lifting unit; 121. Cable inlet bushing;

[0049] 13. busbar; 131. first docking section; 132. second docking section; 133. connecting section; 134. horizontal section; 135. vertical section; 136. adapter;

[0050] 14. Insulating support member; 141. Groove; 142. Slot; 143. First locking hole; 144. Second locking hole; 145. Main body; 146. Insulating rod; 147. U-shaped insulating plate; 1471. Mounting hole; 148. Third locking hole;

[0051] 15. Air box shell;

[0052] 20. Mechanism chamber; 21. Mechanism chamber shell; 211. Bottom plate; 2111. First avoidance hole; 2112. Second avoidance hole; 22. First lock; 221. Lock rod; 23. Mounting plate; 24. Second lock; 25. Vacuum circuit breaker operating part; 26. Disconnector operating part;

[0053] 30. Cable chamber; 31. First cable chamber; 311. First door; 3111. First lock hole; 312. First cable clamp; 32. Second cable chamber; 321. Second door; 3211. Second lock hole; 322. Second cable clamp. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0055] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0058] like Figure 1-Figure 3 As shown, this embodiment provides a gas box and a ring main unit. It should be noted that the descriptions of the upper, lower, left, right, front and rear directions in the following text are all based on the directions relative to the user when the ring main unit is in use. The ring main unit includes a gas box 10, a mechanism chamber 20 and a cable chamber 30, wherein the gas box 10 includes a gas box shell 15 and a first functional unit and a second functional unit arranged in the gas box shell 15, and the three-phase electricity of the first functional unit and the three-phase electricity of the second functional unit are respectively electrically connected through the three-phase bus 13. The cable chamber 30 includes a first cable chamber 31 and a second cable chamber 32, wherein the cable in the first cable chamber 31 is electrically connected to the first functional unit. The outlet of the second functional unit is connected to the cable in the second cable chamber 32. The mechanism chamber 20 includes a mechanism chamber shell 21 and an operating unit arranged in the mechanism chamber 20, and the operating unit is electrically connected to the second functional unit and is used for the user to operate.

[0059] In this embodiment, the first functional unit and the second functional unit are arranged in the left-right direction in the air box 10, the mechanism chamber 20 is arranged at the front side of the air box 10, and the cable chamber 30 is arranged below the mechanism chamber 20. The bottom plate 211 of the mechanism chamber 20 is also the top plate of the cable chamber 30. The first cable chamber 31 and the second cable chamber 32 are arranged in the left-right direction, so that the first cable chamber 31 is located below the first functional unit, and the second cable chamber 32 is located below the second functional unit, so as to facilitate corresponding connection.

[0060] In this embodiment, the first functional unit is a cable lifting unit 12 and the second functional unit is a vacuum circuit breaker unit 11 as an example for description.

[0061] like Figure 1 and Figure 5 As shown, the cable lifting unit 12 is used to realize the electrical connection between the cables in the first cable chamber 31 and the busbar 13. Specifically, the cable lifting unit 12 includes three cable entry bushings 121, and the three cable entry bushings 121 are arranged at the lower position on the left side of the air box 10, and each cable entry bushing 121 penetrates the front side wall of the air box 10 from back to front and extends into the first cable chamber 31. The cables (including three phases) in the first cable chamber 31 are conductively connected to the corresponding cable entry bushings 121, and the cables are conductively connected to the three-phase busbar 13 of the corresponding phase through the cable entry bushings 121. Optionally, as Figure 3 As shown, a first cable clamp 312 is provided in the first cable chamber 31, and the first cable clamp 312 is used to clamp the cable in the first cable chamber 31. Optionally, a lightning arrester and a current transformer etc. may be configured in the first cable chamber 31 according to requirements.

[0062] like Figure 1 , Figure 3 and Figure 4As shown, a first door body 311 is provided at the front side of the first cable chamber 31, and the first door body 311 can be opened and closed. A first lock 22 is provided at a position corresponding to the first cable chamber 31 in the mechanism chamber 20, and the first lock 22 is configured to unlock the first door body 311 when the cable in the first cable chamber 31 is not charged, so as to prevent the user from mistakenly entering the charged chamber and improve the safety of the ring network cabinet. Optionally, the first lock 22 is an electromagnetic lock, and a mounting plate 23 is provided on the bottom plate 211 of the mechanism chamber shell 21, and the first lock 22 is connected to the mounting plate 23. A first avoidance hole 2111 is provided on the bottom plate 211, and a first lock hole 3111 is provided on the flange of the first door body 311 facing the mechanism chamber 20. When the first door body 311 is closed, the first lock hole 3111 is arranged opposite to the first avoidance hole 2111. The electromagnetic lock includes a locking rod 221, which can extend downward and pass through the first avoidance hole 2111 and the first locking hole 3111 in sequence, thereby locking the first door body 311. Specifically, when the cable in the first cable chamber 31 is charged, the locking rod 221 of the electromagnetic lock extends and locks the first door body 311. Only when the cable in the first cable chamber 31 is not charged, the locking rod 221 retracts from the first locking hole 3111, so that the first door body 311 can be opened, thereby facilitating the user to operate the structure in the first cable chamber 31.

[0063] like Figure 3 , Figure 5 and Figure 6 As shown, the vacuum circuit breaker unit 11 is used to cut off and connect the load circuit, as well as cut off the fault circuit to prevent the accident from expanding. The vacuum circuit breaker unit 11 includes a vacuum circuit breaker body 111, a disconnector body 112, a copper busbar and a cable outlet bushing 113. Among them, the three-phase busbar 13 is electrically connected to the vacuum circuit breaker body 111 respectively, the vacuum circuit breaker body 111 is electrically connected to the disconnector body 112, and the cable outlet bushing 113 is arranged at the lower part of the gas box shell 15 and extends into the second cable chamber 32 after passing through the front side wall of the gas box shell 15 from back to front. One end of the copper busbar is electrically connected to the disconnector body 112, and the other end is electrically connected to the cable outlet bushing 113. The cable in the second cable chamber 32 is electrically connected to the cable outlet bushing 113, thereby realizing electrical connection with the vacuum circuit breaker unit 11. Optionally, a second cable clamp 322 is arranged in the second cable chamber 32, and the second cable clamp 322 is used to clamp the cable in the second cable chamber 32. Optionally, a lightning arrester, a current transformer, etc. may be configured in the second cable chamber 32 according to requirements.

[0064] like Figure 5 and Figure 6As shown, the vacuum circuit breaker body 111, the disconnector body 112, and the cable outlet bushing 113 are arranged in sequence from top to bottom. Specifically, the vacuum circuit breaker body 111 includes a housing 1115, a circuit breaker control unit 1111, an arc extinguishing chamber moving end conductor 1112, an arc extinguishing chamber static end conductor 1113, and a soft connection conductor 1114 arranged in the housing 1115. Among them, the circuit breaker control unit 1111 and the arc extinguishing chamber moving end conductor 1112 are located at the upper part, one end of the soft connection conductor 1114 is sleeved on the arc extinguishing chamber moving end conductor 1112, and the other end passes through the housing 1115 in the left and right direction and is connected to the busbar 13, and the arc extinguishing chamber static end conductor 1113 is located at the lower part. The isolating switch body 112 is integrally arranged below the vacuum circuit breaker body 111 and comprises a connection contact 1121, a moving knife switch 1122, a knife switch seat 1123 and a grounding contact 1124 arranged in sequence from top to bottom. The connection contact 1121 is connected to the moving end conductor 1112 of the arc extinguishing chamber.

[0065] Preferably, the three soft connection conductors 1114 of the vacuum circuit breaker body 111 are arranged in sequence along the front-to-back direction, and the three-phase busbars 13 are respectively connected to the three soft connection conductors 1114. In other words, one end of the three-phase busbars 13, which is respectively used to connect to the vacuum circuit breaker body 111, is also arranged in sequence along the front-to-back direction. This arrangement reduces the space occupied by the vacuum circuit breaker unit 11 in the left-right direction, thereby reducing the size of the gas box 10 and the entire ring main unit in the left-right direction.

[0066] like Figure 3 As shown, a vacuum circuit breaker operating unit 25 and an isolating switch operating unit 26 are provided in the mechanism chamber 20. The vacuum circuit breaker operating unit 25 is electrically connected to the vacuum circuit breaker body 111 and is used for operation by the user. The isolating switch operating unit 26 is electrically connected to the isolating switch body 112 and is used for operation by the user. In this embodiment, the vacuum circuit breaker operating unit 25 and the isolating switch operating unit 26 are arranged in the up-down direction, that is, the isolating switch operating unit 26 is located at the lower position of the mechanism chamber 20.

[0067] like Figure 4 As shown, the second cable chamber 32 is provided with a second door body 321, and a second lock 24 is provided at a position corresponding to the second cable chamber 32 in the mechanism chamber 20, and the second lock 24 is used to lock the second door body 321. The second lock 24 is configured to unlock the second door body 321 when the vacuum circuit breaker unit 11 is in a grounded state, thereby improving the safety of users when operating the components inside the second cable chamber 32.

[0068] In this embodiment, the second lock 24 includes a latch, a second avoidance hole 2112 is provided on the bottom plate 211 of the mechanism chamber shell 21, and a second lock hole 3211 is provided on the flange of the second door body 321 facing the mechanism chamber 20. When the second door body 321 is closed, the second lock hole 3211 is arranged opposite to the second avoidance hole 2112. The latch of the second lock 24 can pass through the second avoidance hole 2112 and the second lock hole 3211 in sequence, thereby locking the second door body 321. Optionally, the second lock 24 is a mechanical lock, and the latch is mechanically linked with the isolating switch operating part 26. When the isolating switch operating part 26 is in a grounded state, it drives the latch to move upward and leave the second lock hole 3211, thereby not locking the second door body 321. When the isolating switch operating part 26 is in a non-grounded state, the latch is correspondingly inserted into the second lock hole 3211, and the second door body 321 cannot be opened. Of course, in other embodiments, the second lock 24 can also be configured as an electromagnetic lock electrically connected to the grounding switch, which is not specifically limited here. The detailed structure of the linkage between the second lock and the isolating switch operating part 26 is prior art and will not be repeated here.

[0069] In the prior art, since the busbar connecting the first functional unit and the second functional unit is relatively long, when there is a short-time withstand current and a peak withstand current in the gas box, the busbar is prone to deformation, contact point ablation and other problems under the action of electric force. In some solutions, insulators are arranged in the gas box to support the busbar to prevent deformation of the busbar or contact point ablation, but due to the arrangement of components in the gas box, the installation space of the insulator is limited and difficult to install, and the assembly of multiple components is cumbersome.

[0070] In this regard, Figure 5 As shown, the gas box 10 also includes an insulating support 14. Along the arrangement direction of the three-phase busbars 13 at the corresponding parts, the middle part of the insulating support 14 is provided with a first mounting part, and the two ends are respectively provided with second mounting parts. The first mounting part cooperates and connects with the busbar 13 located in the middle, and the second mounting part cooperates and connects with the busbar 13 located at the end. The gas box 10 of this embodiment realizes the connection of the three-phase busbar 13 through an insulating support 14, and plays a role in supporting and strengthening the three-phase busbar 13, thereby eliminating the problems of busbar 13 deformation and contact point ablation caused by interphase electromotive force, with fewer parts and convenient assembly, and the insulating support 14 connected between the three-phase busbars 13 will not interfere with the position of other components inside the gas box 10; in addition, the insulating support 14 is provided with a first mounting part and a second mounting part with different structures, so that it can cooperate well with the busbar 13 located in the middle of the arrangement direction and the busbar 13 located at both ends of the arrangement direction, thereby improving the assembly convenience of the insulating support 14 and the reliability of cooperation with the busbar 13.

[0071] It should be noted that the extension trajectory of the busbar 13 is usually not a straight line, but the approximate extension trajectory of the three-phase busbar 13 is close. In this embodiment, the "corresponding parts" of the three-phase busbar 13 refer to the opposite parts of the three-phase busbar 13 on the extension trajectory, or can be understood as the corresponding parts of the three-phase busbar 13 that are parallel to each other.

[0072] In some embodiments, Figure 5 As shown, one end of each phase busbar 13 used for connecting with the soft connection conductor 1114 of the vacuum circuit breaker body 111 extends horizontally and forms a horizontal section 134, then the busbar 13 is bent downward to form a vertical section 135, and then the busbar 13 is connected to the cable lifting unit 12 after one or more bends. In this embodiment, the three horizontal sections 134 are the "corresponding parts" of the three-phase busbar 13, and the three vertical sections 135 are also the "corresponding parts" of the three-phase busbar 13. Insulating support members 14 can be set at the above two corresponding parts. In this embodiment, the arrangement of the busbar 13 enables the ring network cabinet to be suitable for a voltage level of 12kV. In this embodiment, the vertical section 135 extends along the first direction (that is, the up and down direction), and the three vertical sections 135 are arranged along the third direction (that is, the front and back direction). The horizontal section 134 extends along the second direction, and the three horizontal sections 134 are arranged along the third direction. That is, the arrangement directions of the two corresponding parts are the same.

[0073] exist Figure 5 In the illustrated embodiment, the vertical section 135 is the longest, so the busbar 13 has the maximum electric force at the vertical section 135, so the insulating support members 14 are installed at the three vertical sections 135. It is understandable that one, two or more insulating support members 14 can be connected to the vertical section 135. In other embodiments, insulating support members 14 can also be set at the three horizontal sections 134. It should be noted that based on the complex extension trajectory of the busbar 13, each phase busbar 13 can be set to be connected by two or more conductor rows.

[0074] In some embodiments, Figure 7 and Figure 8 As shown, the arrangement directions of different corresponding parts of the three-phase busbar 13 are also different. Specifically, each phase busbar 13 includes a first docking section 131 and a second docking section 132. The first docking section 131 is connected to the cable lifting unit 12, and the second docking section 132 is connected to the vacuum circuit breaker unit 11. The three first docking sections 131 are parallel to each other and extend along the first direction. The three first docking sections 131 constitute the corresponding parts of the three-phase busbar 13. The three second docking sections 132 are parallel to each other and extend along the second direction. The three second docking sections 132 also constitute the corresponding parts of the busbar 13. Figure 8As shown, the three first docking sections 131 are arranged along the second direction, and the three second docking sections 132 are arranged along the third direction, that is, the arrangement directions of different corresponding parts of the three-phase busbar 13 are different.

[0075] In this embodiment, the first docking section 131 and the second docking section 132 of each phase busbar 13 are connected by a connecting section 133, and the setting of the connecting section 133 realizes the connection of two docking sections with different extension directions. In this embodiment, the connecting section 133 is integrally formed with the first docking section 131. In other embodiments, the connecting section 133 can also be configured to be integrally formed with the second docking section 132. In this embodiment, the three first docking sections 131 and the three second docking sections 132 are all connected with insulating support members 14. Of course, in other embodiments, it is also possible to choose to connect the insulating support member 14 only on the first docking section 131 or only on the second docking section 132.

[0076] Preferably, if Figure 8 As shown, the spacing between the first docking sections 131 of two adjacent phases is B1, and the spacing between the second docking sections 132 of two adjacent phases is B2, and B1 is smaller than B2. The overlapping length of the three-phase first docking sections 131 in the first direction is L1, and the overlapping length of the three-phase second docking sections 132 in the second direction is L2, and L1 is larger than L2. For the three-phase bus 13, the longer the overlapping length and the smaller the spacing between adjacent phases, the greater the electric force generated. On the one hand, in this embodiment, the overlapping length is longer and the spacing is smaller at the first docking section 131 close to the cable lifting unit 12 (that is, far away from the vacuum circuit breaker unit 11), so that the maximum electric force of the bus 13 is set away from the vacuum circuit breaker unit 11, thereby reducing the influence of the electric force on the vacuum circuit breaker. On the other hand, the three first docking sections 131 where the maximum electric force is generated are arranged along the second direction (i.e., the left-right direction), so the force generated is also along the second direction. In this embodiment, the soft connection conductor 1114 is arranged in the left-right direction through the shell 1115 of the vacuum circuit breaker body 111. When the busbar 13 is subjected to the left-right direction, the impact on the shell 1115 of the vacuum circuit breaker body is small. On the other hand, in this embodiment, the movable knife switch 1122 of the disconnector body 112 is closed by axial rotation around the third direction, and a limiter is provided in the left-right direction, so the contact of the movable knife switch 1122 in the third direction is more reliable. Therefore, compared with the case where the maximum electric force is along the third direction, when the maximum electric force is along the second direction, it will not cause poor contact of the movable knife switch 1122.

[0077] exist Figure 5 and Figure 7 In the embodiment shown, the corresponding parts of the three-phase busbar 13 are located in the same plane. Fig. 9As shown, the insulating support member 14 is a rod, and a groove 141 is provided in the middle of the side of the rod. The groove 141 constitutes a first mounting portion. Along the arrangement direction of the corresponding parts of the busbar 13, the busbar 13 located in the middle is plugged into the groove 141. Slots 142 are respectively provided on the end faces of both ends of the insulating support member 14. The slots 142 constitute a second mounting portion. The busbar 13 located at the end is plugged into the corresponding slots 142. When the corresponding parts of the three-phase busbar 13 are located in the same plane, the above arrangement can ensure that the insulating support member 14 is well matched with the three-phase busbar 13, thereby improving the support reliability of the busbar 13 and avoiding deformation of the busbar 13.

[0078] Preferably, a first locking hole 143 is provided at the bottom of the groove 141, and a first fastener penetrates the first locking hole 143 and the corresponding busbar 13, and connects the corresponding busbar 13 to the insulating support 14. A second locking hole 144 is provided on the side wall of the slot 142, and a second fastener penetrates the second locking hole 144 and the corresponding busbar 13, and connects the corresponding busbar 13 to the insulating support 14. By providing the first fastener and the second fastener, the reliability of the connection between the busbars 13 of each phase and the insulating support 14 can be further improved, and the structure is simple and the cost is low. In other embodiments, the busbars 13 of each phase can also be connected to the insulating support plate by bonding, which is not specifically limited here.

[0079] In some embodiments, Fig.10 and Fig.11 As shown, the corresponding parts of the three-phase busbar 13 are not located in the same plane. In this embodiment, each phase busbar 13 includes a first docking section 131, a second docking section 132 and a connecting section 133. The first docking section 131 is connected to the cable lifting unit 12, the second docking section 132 is connected (directly or indirectly) to the vacuum circuit breaker unit 11, and the connecting section 133 connects the first docking section 131 and the second docking section 132. In this embodiment, the length of the connecting section 133 is greater than the first docking section 131 and the second docking section 132. The three-phase connecting sections 133 are arranged in parallel and constitute the corresponding parts of the busbar 13. The three-phase connecting sections 133 are arranged along the third direction. The connecting sections 133 located in the middle along the third direction and the connecting sections 133 located at both ends are staggered in the second direction, that is, the three connecting sections 133 are not located in the same plane. The staggered arrangement increases the insulation clearance between adjacent phase busbars 13 and the creepage distance of the insulating support 14, which can not only reduce the maximum electric force and the deformation of the busbar 13, but also improve the insulation effect. This arrangement is suitable for a wider range of voltage levels, and this busbar 13 arrangement structure is applicable to a 24kV voltage level.

[0080] exist Fig.10 and Fig.11In the illustrated embodiment, the three first docking sections 131 are arranged along the third direction and all extend along the second direction. The three second docking sections 132 are arranged along the third direction and all extend along the second direction. Preferably, among the three-phase first docking sections 131, the extension direction of one phase is opposite to the extension direction of the other two phases. Therefore, the electric force at the first docking section 131 of one phase with opposite extension directions and the first docking section 131 of the adjacent phase changes from the original mutual attraction to repulsion, so that it can offset the attraction generated at the connecting section 133 of the two phases, thereby achieving a reduction in the comprehensive electric force and a weakening of the force on the busbar 13.

[0081] Optionally, in some embodiments, Fig.11 As shown, along the third direction, the first docking section 131 of the one-phase busbar 13 closest to the cable lifting unit 12 extends in the opposite direction to the first docking sections 131 of the other two phases. Fig.11 As shown, the first butting section 131 of the one-phase busbar 13 closest to the cable lifting unit 12 extends toward the vacuum circuit breaker unit 11, while the other two-phase first butting sections 131 extend away from the vacuum circuit breaker unit 11. In this embodiment, the first butting section 131 of the one-phase busbar 13 closest to the cable lifting unit 12 may extend away from the vacuum circuit breaker unit 11, while the other two-phase first butting sections 131 extend toward the vacuum circuit breaker unit 11.

[0082] In other embodiments, Fig.12 As shown, the extension direction of the first docking segment 131 located in the middle along the third direction is set to be opposite to the extension direction of the other two first docking segments 131. Fig.12 As shown in the figure, the first butt joint section 131 located in the middle along the third direction extends toward the vacuum circuit breaker unit 11, while the other two-phase first butt joint sections 131 extend in a direction away from the vacuum circuit breaker unit 11. In this embodiment, it is also possible to extend the first butt joint section 131 located in the middle along the third direction in a direction away from the vacuum circuit breaker unit 11, while the other two-phase first butt joint sections 131 extend in a direction toward the vacuum circuit breaker unit 11.

[0083] In another embodiment (not shown), the first butt joint section 131 of the one-phase busbar 13 away from the cable lifting unit 12 along the third direction may also extend in the opposite direction to the other two-phase first butt joint sections 131. Optionally, the first butt joint section 131 away from the cable lifting unit 12 along the third direction extends toward the vacuum circuit breaker unit 11, while the other two-phase first butt joint sections 131 extend away from the vacuum circuit breaker unit 11. In this embodiment, it is also possible to choose to extend the first butt joint section 131 away from the cable lifting unit 12 along the third direction in the direction away from the vacuum circuit breaker unit 11, while the other two-phase first butt joint sections 131 extend toward the vacuum circuit breaker unit 11.

[0084] It should be noted that if Fig.10 As shown, in order to facilitate the connection between the busbar 13 and the cable lifting unit 12, in this embodiment, each phase busbar 13 also includes a transition piece 136, and the transition piece 136 is respectively connected to the second docking section 132 and the cable lifting unit 12.

[0085] In order to facilitate the connection between the insulating support member 14 and the corresponding parts not located in the same plane, Fig.11 and Fig.13 As shown, the insulating support member 14 includes a main body 145 and a support portion, wherein the two ends of the main body 145 constitute a second mounting portion, and are respectively abutted against and connected to the connecting sections 133 located at the two ends, the support portion is protruding from the side of the main body 145 and is connected to the middle of the main body 145, and the support portion constitutes a first mounting portion and is abutted against and connected to the connecting section 133 located in the middle. The above arrangement facilitates the insulating support member 14 to be closely matched with each phase busbar 13, respectively, and improves the support effect on the busbar 13.

[0086] In this embodiment, the main body 145 is constructed as a plate, and third locking holes 148 are respectively provided at both ends. The fasteners are sequentially passed through the third locking holes 148 and the connecting sections 133 of the busbar 13 of the corresponding phase, thereby realizing the connection between the insulating support 14 and the busbar 13 of the corresponding phase.

[0087] In some embodiments, Fig.13 As shown, the support portion is an insulating rod 146, and the third fastener is sequentially passed through the main body 145, the insulating rod 146 and the connecting section 133 located in the middle, so that the connecting section 133 located in the middle is connected to the insulating support member 14. This arrangement uses a third fastener to simultaneously realize the connection between the insulating rod 146 and the main body 145, and the connection between the insulating rod 146 and the connecting section 133 of the busbar 13, and the structure is simpler. Optionally, the cross section of the insulating rod 146 can be circular, square, etc., which is not specifically limited here.

[0088] In some embodiments, Fig.14 and Fig.15As shown, the support portion is constructed as a U-shaped insulating plate 147, and the two side walls of the U-shaped insulating plate 147 are respectively connected to the connecting section 133 and the main body 145 located in the middle through the fourth fastener. This arrangement allows the support portion and the main body 145 to be connected together first, and then the whole is installed on the three-phase bus 13, which is more convenient to operate. In this embodiment, mounting holes 1471 are respectively provided at the two side walls of the U-shaped insulating plate 147. After a fastener passes through the main body 145 and one of the mounting holes 1471, the connection between the main body 145 and the support portion is realized, and after another fastener passes through another mounting hole 1471 and the connecting portion of the bus 13 in sequence, the connection between the insulating support member 14 and the bus 13 is realized.

[0089] It should be noted that all the above-mentioned fasteners may be a structure of bolts and nuts.

[0090] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the field, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scopes, and the content of this specification should not be understood as limiting the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An air box, characterized in that: The utility model comprises a first functional unit, a second functional unit, a three-phase busbar (13) and an insulating support member (14), wherein the two ends of the busbar (13) of each phase are respectively connected to the first functional unit and the second functional unit, and along the arrangement direction of the three-phase busbars (13) at corresponding positions, a first mounting portion is arranged in the middle of the insulating support member (14), and second mounting portions are respectively arranged at the two ends, the first mounting portion cooperates with and is connected to the busbar (13) located in the middle, and the second mounting portion cooperates with and is connected to the busbar (13) located at the end.

2. The air box according to claim 1, characterized in that The insulating support member (14) is a rod member, and a groove (141) is provided in the middle of the side surface, the groove (141) constitutes the first mounting portion, and the busbar (13) located in the middle is plugged into and matched with the groove (141); Slots (142) are respectively provided on the end surfaces of both ends of the insulating support member (14), the slots (142) forming the second mounting portion, and the busbars (13) located at the ends are plugged into and matched with the corresponding slots (142).

3. The air box according to claim 2, characterized in that A first locking hole (143) is provided at the bottom of the groove (141), and a first fastener penetrates the first locking hole (143) and the corresponding busbar (13), and connects the corresponding busbar (13) to the insulating support member (14); and / or A second locking hole (144) is provided on the side wall of the slot (142); a second fastener penetrates the second locking hole (144) and the corresponding busbar (13), and connects the corresponding busbar (13) to the insulating support member (14).

4. The air box according to any one of claims 1 to 3, characterized in that: The first functional unit is a cable lifting unit (12), the second functional unit is a vacuum circuit breaker unit (11), the busbar (13) of each phase comprises a first docking section (131) connected to the cable lifting unit (12) and a second docking section (132) connected to the vacuum circuit breaker unit (11), three of the first docking sections (131) are parallel to each other and extend along a first direction, the three first docking sections (131) constitute the corresponding parts and are arranged along a second direction; three of the second docking sections (132) are parallel to each other and extend along the second direction, the three second docking sections (132) constitute the corresponding parts and are arranged along a third direction.

5. The air box according to claim 1, characterized in that The three-phase busbars (13) all include connecting sections (133), the three-phase connecting sections (133) are arranged along a third direction and constitute the corresponding parts, the connecting sections (133) located in the middle along the third direction and the connecting sections (133) located at both ends are staggered in a second direction, and the second direction is perpendicular to the third direction; the insulating support member (14) includes: A main body (145), wherein two ends of the main body (145) constitute the second mounting portion and are respectively abutted against and connected to the connecting sections (133) located at the two ends; A support portion, the support portion is arranged to protrude from the side of the main body portion (145) and is connected to the middle portion of the main body portion (145), the support portion constitutes the first mounting portion and is abutted against and connected to the connecting section (133) located in the middle.

6. The air box according to claim 5, characterized in that The support portion is an insulating rod (146), and the third fastener is sequentially inserted through the main body (145), the insulating rod (146) and the connecting section (133) located in the middle, so that the connecting section (133) located in the middle is connected to the insulating support member (14); or The support portion is constructed as a U-shaped insulating plate (147), and two side walls of the U-shaped insulating plate (147) are respectively connected to the connecting section (133) and the main body (145) located in the middle through fourth fasteners.

7. The air box according to claim 5, characterized in that The busbar (13) of each phase further comprises a first docking section (131) and a second docking section (132) respectively connected to the first functional unit and the second functional unit, the first docking section (131) and the second docking section (132) both extend along the second direction, and the connecting section (133) extends along the first direction and connects the first docking section (131) and the second docking section (132); Among the three-phase first connecting sections (131), the extending direction of the first connecting section (131) of one phase is opposite to the extending direction of the first connecting sections (131) of the other two phases.

8. The air box according to claim 1, characterized in that The second functional unit is a vacuum circuit breaker unit (11), the vacuum circuit breaker unit (11) comprising a vacuum circuit breaker body (111) and an isolating switch body (112), the vacuum circuit breaker body (111) comprising: a circuit breaker control unit (1111) and an arc extinguishing chamber moving end conductor (1112) located at the upper part, an arc extinguishing chamber static end conductor (1113) located at the lower part, and three soft connection conductors (1114) respectively connected to the arc extinguishing chamber moving end conductor (1112), the isolating switch body (112) being located below the arc extinguishing chamber static end conductor (1113) and connected to the arc extinguishing chamber static end conductor (1113); The three soft connection conductors (1114) are arranged in the front-to-back direction, and the three-phase busbars (13) are respectively connected to the three soft connection conductors (1114).

9. A ring main unit, characterized in that: The invention comprises a mechanism chamber (20), a cable chamber (30) and an air box according to any one of claims 1 to 8, wherein the mechanism chamber (20) is arranged at the front side of the air box, and the cable chamber (30) is arranged below the mechanism chamber (20).

10. The ring main unit according to claim 9, characterized in that: The first functional unit is a cable lifting unit (12), the second functional unit is a vacuum circuit breaker unit (11), The cable chamber (30) comprises a first cable chamber (31), the cable lifting unit (12) is connected to the cable in the first cable chamber (31), the first cable chamber (31) is provided with a first door (311), a first lock (22) is provided at a position corresponding to the first cable chamber (31) in the mechanism chamber (20), and the first lock (22) is configured to unlock the first door (311) when the cable in the first cable chamber (31) is not energized; The cable chamber (30) further comprises a second cable chamber (32), the vacuum circuit breaker unit (11) is connected to the cable in the second cable chamber (32), the second cable chamber (32) is provided with a second door body (321), a second lock (24) is provided at a position corresponding to the second cable chamber (32) in the mechanism chamber (20), the second lock (24) is used to lock the second door body (321), and the second lock (24) is configured to unlock the second door body (321) when the vacuum circuit breaker unit (11) is in a grounded state.

Images