Intelligent modular 12 / 24 kV switch cabinet

Abstract

The invention relates to the technical field of switch cabinets, in particular to an intelligent modular 12 / 24kV switch cabinet, which is characterized in that two side walls of a bus cabinet are respectively provided with a bus and an outgoing line contact, an inner cavity of the bus cabinet is provided with four groups of bus bars, an output cable and an electric brake assembly, and the upper part and the lower part of a handcart cabinet arranged at two sides of the bus cabinet are respectively provided with a handcart chamber and an operation cavity; a contact window is arranged on the inner side wall of the handcart chamber; the frame-shaped connecting piece comprises a rectangular frame body and a mechanical locking mechanism for buckling the rectangular frame body with the bus cabinet and the handcart cabinet; the inner side wall of the PT handcart is provided with a connecting contact and the bottom of the PT handcart is slidably clamped with the handcart chamber; the driving assembly is mounted in the operation cavity and is provided with a push-pull driving mechanism and a transmission mechanism for triggering the driving end of the electric brake assembly; the linkage piece is used for linking the PT handcart to the push-pull driving mechanism; when the sealing door assembly is pushed by the PT handcart, the contact window is opened. And the instrument cabinet is fixedly connected with a pipe fitting on the top surface of the rectangular frame body. And the requirements of compact structure design and convenient assembly of the high-voltage switch cabinet are met.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to an intelligent modular 12 / 24kV switchgear. Background Technology

[0002] As power systems develop towards intelligence and high reliability, the structural design, ease of operation, and operational safety of high-voltage switchgear have become key areas of focus for the industry.

[0003] Traditional high-voltage switchgear typically includes one instrument compartment, one truck compartment, one busbar compartment, and one cable compartment. The cable compartment houses cables and outgoing contacts, current transformers, line surge arresters, grounding switches, and zero-sequence current transformers. The instrument compartment contains various intelligent control components and protection and display modules. The busbar compartment contains busbars and busbar contacts. The truck compartment houses independent modules such as circuit breakers or current transformers. Common problems include loose structure, large footprint, and difficulty in rapid assembly. Especially in truck-type switchgear, there is still room for optimization in the truck arrangement, cabinet structure, guide rail materials, and door design.

[0004] Therefore, there is an urgent need for a high-voltage switchgear that is compact in structure, flexible in operation, safe and reliable, and easy to assemble. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent modular 12 / 24kV switchgear to solve the problems of loose structure and inconvenient assembly in existing high-voltage switchgear.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent modular 12 / 24kV switchgear, wherein busbar contacts and outgoing contacts are respectively provided in pairs on the upper and lower sides of the middle of the two side walls of the busbar cabinet; the inner cavity of the busbar cabinet is provided with four sets of busbars and output cables respectively connected to the busbar contacts and outgoing contacts, and a switch assembly for closing each set of busbars and output cables; the driving end of the switch assembly is rotatably mounted on the two side walls of the busbar cabinet; a pair of handcart cabinets are provided on both sides of the busbar cabinet; the upper and lower parts of the handcart cabinet are respectively provided with handcart compartments; the lower side of the handcart compartment is provided with an operating cavity; the inner side wall of the handcart compartment is provided with contact windows corresponding to the positions of the busbar contacts and outgoing contacts; the bottom surface of the handcart compartment is provided with a T-slot; a frame-shaped connector is provided on the busbar cabinet and The PT trolley has a rectangular frame between the outer edges of its side walls and a mechanical locking mechanism for fastening the rectangular frame to the corresponding busbar cabinet and PT trolley cabinet; the inner side wall of the PT trolley is provided with connecting contacts that are respectively inserted and matched with the busbar contacts and outgoing contacts, and the bottom is slidably engaged with the PT trolley compartment; the drive assembly is installed in the operating cavity and integrates a push-pull drive mechanism and a transmission mechanism for triggering the drive end of the circuit breaker assembly; the linkage is fixed to the bottom surface of the PT trolley and is linked to the moving part of the push-pull drive mechanism in the drive assembly through the T-slot; the sealing door assembly is used to keep the contact window normally closed and to open the contact window when pushed by the PT trolley; the instrument cabinet is located on the top of one of the PT trolley cabinets and has a pipe fixedly connected to the top surface of the rectangular frame on its inner side.

[0007] Preferably, the circuit breaker assembly includes a base plate bolted to the inner wall of the busbar cabinet, a bearing fixed to the bottom front end of the base plate, a rotating shaft head rotatably mounted on the bearing and with its outer end penetrating the side wall of the busbar cabinet, a driving bevel gear fixedly mounted on the inner end of the rotating shaft head, multiple supports longitudinally fixed to the bottom of the side wall of the base plate, a shaft rotatably mounted on the supports, a driven bevel gear fixedly mounted on the front end of the shaft and meshing with the driving bevel gear, three fixed sleeves fixedly mounted on the shaft, a swing contact radially fixed to the front end of the fixed sleeve and electrically connected to the inner end of the outgoing contact, a swing lug fixed to the rear end of the fixed sleeve, a fixed lug fixed to the top of the side wall of the base plate and corresponding to the swing lug, a tension spring rotatably connected to the fixed lug and the swing lug at its top and bottom ends respectively, and a fixed contact that engages with the end of the swing contact and is electrically connected to the input end of the output cable in the busbar cabinet. The rotating shaft head is the driving end of the circuit breaker assembly.

[0008] Preferably, the front and rear ends of the two side walls of the busbar cabinet are provided with multiple lock holes 1 vertically, and the front and rear ends of the inner side wall of the handcart cabinet are provided with lock holes 2. The mechanical locking mechanism includes a threaded sleeve fixedly fitted in the middle of the front and rear walls of the rectangular frame, a locking screw threaded in the threaded sleeve, a linkage block rotatably fitted in the inner end of the locking screw, a rotating shaft with both ends rotatably fitted in the two side walls of the rectangular frame and corresponding to lock holes 1 and 2, a locking block fixed at both ends of the rotating shaft and corresponding to lock holes 1 and 2, a swing arm fixedly fitted in the rotating shaft at one end, a plate extending vertically along the upper and lower sides of the middle of the inner cavity of the front and rear parts of the rectangular frame and rotatably connected to the other end of the corresponding swing arm, and two connecting arms with one end rotatably connected to the top and bottom of the linkage block and the other end rotatably connected to the end of the corresponding plate.

[0009] Preferably, the drive assembly includes a pull-out frame fixedly inserted into the operating cavity, a drive screw with both ends rotatably sleeved on the inner and outer sidewalls of the pull-out frame, a screw nut threaded onto the drive screw, a push block fixedly sleeved on the screw nut in the middle, and a guide rod with both ends vertically fixed to the inner and outer sidewalls of the pull-out frame and slidably sleeved with the ends of the push block. The push block has a rectangular groove in the center of its top surface corresponding to the T-slot. The linkage includes a base fixed to the center of the bottom surface of the PT handcart with bolts. The base has an L-shaped groove in the middle. A rotating column is rotatably sleeved in the straight groove of the L-shaped groove. A lever is fixedly sleeved at the inner end of the rotating column and engages with the corner groove of the L-shaped groove. The lever engages with the rectangular groove through the front end of the T-slot.

[0010] Preferably, the inner wall panel of the pull-out frame is rotatably fitted with a closing prism whose inner end is axially fitted and matched with the drive end of the circuit breaker assembly. The outer wall panel of the pull-out frame is rotatably fitted with an operating prism directly opposite the closing prism. A prism sleeve is slidably fitted on the operating prism. A movable plate extending to the inner front end of the push block is rotatably fitted outside the prism sleeve. A guide rod two is fixed between the inner and outer wall panels of the pull-out frame and slidably fitted with the movable plate near its front and rear ends. A return spring is fitted on the part of the guide rod two located inside the movable plate. The end of the prism sleeve and the closing prism are axially fitted and matched.

[0011] Preferably, the sealing door assembly includes mounting bases fixed to the top and bottom ends of the front and rear parts of the inner side wall of the handcart, vertical rods with their top and bottom ends respectively fixed to the mounting bases, end blocks slidably fitted onto the upper and lower sides of the middle part of the vertical rods, sealing plates with their front and rear ends respectively fixedly connected to the corresponding end blocks and closing the contact window, L-shaped rails fixed to the middle of the front and rear walls of the handcart and extending horizontally, trigger blocks with their bottom ends slidably engaged with the L-shaped rails, connecting rods with their outer ends rotatably connected to the top of the trigger blocks and their inner ends rotatably connected to the corresponding end blocks, and compression springs fitted onto the top and bottom of the vertical rods. The front and rear walls of the PT handcart are respectively provided with slots that slidably engage with the L-shaped rails.

[0012] Preferably, the top surface of the L-shaped rail is provided with a strip groove along its axial direction, and the bottom end of the trigger block is slidably engaged with the strip groove.

[0013] Preferably, the top of the outer side of the handcart interior is provided with a smart control socket, the top of the PT handcart is connected to a smart control plug that matches the smart control socket via a wiring harness, the inner side wall of the handcart cabinet is provided with a wiring socket that is electrically connected to the smart control socket, and a vertical shell is fixed in the middle of the rectangular frame interior, with a wire outlet hole provided in the vertical shell opposite the wiring socket.

[0014] Preferably, a connecting ring is fixed at the center of the top surface of the rectangular frame, and a connecting flange that is fixedly connected to the connecting ring is connected to the bottom of the pipe fitting.

[0015] Preferably, slide rails are fixed to the front and rear sides of the bottom surface of the handcart's interior cavity, and a strip rail that slides and matches the slide rails is fixed to the bottom surface of the PT handcart.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The present invention relates to an intelligent modular 12 / 24kV switchgear composed of multiple independent modules, which facilitates modular assembly, not only improving the convenience of overall switchgear assembly, but also achieving the overall compact structure of the combined switchgear.

[0017] The present invention relates to an intelligent modular 12 / 24kV switchgear with four handcart compartments and matching PT handcarts, realizing multi-purpose use of one cabinet, small footprint, and easy integrated management. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional structural diagram of the busbar cabinet of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the circuit breaker assembly of the present invention; Figure 4This is a first three-dimensional structural diagram of the handcart cabinet of the present invention; Figure 5 This is a schematic diagram of the second three-dimensional structure of the handcart cabinet of the present invention; Figure 6 This is a three-dimensional structural diagram of the frame-shaped connector of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A; Figure 8 This is a three-dimensional structural diagram of the PT handcart of the present invention; Figure 9 This is a three-dimensional structural diagram of the driving component of the present invention; Figure 10 This is a three-dimensional structural diagram of the linkage component of the present invention; Figure 11 This is a three-dimensional structural diagram of the sealing door assembly of the present invention; Figure 12 This is a three-dimensional structural diagram of the instrument cabinet of the present invention.

[0019] In the diagram: 1-Busbar cabinet; 1.1-Busbar contact; 1.2-Outgoing contact; 1.3-Switch assembly; 1.3.1-Base plate; 1.3.2-Shaft seat; 1.3.3-Rotating shaft head; 1.3.4-Driving bevel gear; 1.3.5-Support; 1.3.6-Shaft; 1.3.7-Driven bevel gear; 1.3.8-Fixed sleeve; 1.3.9-Swing contact; 1.3.10-Swing lug; 1.3.11-Fixed lug; 1.3.12-Tension spring; 1.3.13-Fixed contact; 1.4-Lock hole one; 2-Handcart cabinet; 2.1-Handcart compartment; 2.2-Operating chamber; 2.3-Slide rail; 2.4-T-slot; 2.5-Intelligent control socket; 2.6-Contact window; 2.7-Second keyhole; 2.8-Wiring socket; 3-Frame-shaped connector; 3.1-Rectangular frame; 3.2-Mechanical locking mechanism; 3.2.1-Rotating shaft; 3.2.2-Locking block; 3.2.3-Swing arm; 3.2.4-Strip; 3.2.5-Threaded sleeve; 3.2.6-Locking screw; 3.2.7-Linking block; 3.2.8-Connecting arm; 3.3-Vertical housing; 3.3.1-Cable outlet; 3.4-Connecting ring; 4-PT handcart; 4.1-Connecting contact head; 4.2-Intelligent control plug; 4.3-Strip rail; 5-Drive assembly; 5.1-Drawer frame; 5.2-Drive screw; 5.3-Screw nut; 5.4-Push block; 5.4.1-Rectangular slot; 5.5-Guide rod one; 5.6-Operating prism; 5.7-Pyramid sleeve; 5.8-Modible plate; 5.9-Guide rod two; 5.10-Closing prism; 5.11-Reset spring; 6-Linkage component; 6.1-Base; 6.1.1-L-shaped groove; 6.2-Rotating column; 6.3-Pulling block; 7-Enclosed door assembly; 7.1-Vertical rod; 7.2-End block; 7.3-Sealing plate; 7.4-Mounting base; 7.5-Compression spring; 7.6-L-shaped rail; 7.6.1-Strip groove; 7.7-Trigger block; 7.8-Connecting rod; 8-Instrument cabinet; 8.1-Pipe fittings; 8.2-Connecting flange. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-12This invention provides a technical solution: an intelligent modular 12 / 24kV switchgear. The busbar cabinet 1 has pairs of busbar contacts 1.1 and outgoing contacts 1.2 arranged on the upper and lower sides of its two side walls. The inner cavity of the busbar cabinet 1 contains four sets of busbars and output cables connected to the busbar contacts 1.1 and outgoing contacts 1.2, and a switching assembly 1.3 for closing each set of busbars and output cables. The driving ends of the switching assemblies 1.3 are rotatably mounted on the two side walls of the busbar cabinet 1. Multiple locking holes 1.4 are vertically arranged at the front and rear ends of the two side walls of the busbar cabinet 1. The circuit breaker assembly 1.3 includes a base plate 1.3.1 bolted to the inner wall of the busbar cabinet 1, a bearing 1.3.2 fixed to the bottom front end of the base plate 1.3.1, a rotating shaft head 1.3.3 rotatably mounted on the bearing 1.3.2 with its outer end penetrating the side wall of the busbar cabinet 1, a driving bevel gear 1.3.4 fixedly mounted on the inner end of the rotating shaft head 1.3.3, multiple supports 1.3.5 longitudinally fixed to the bottom of the side wall of the base plate 1.3.1, a shaft 1.3.6 rotatably mounted on the support 1.3.5, a driven bevel gear 1.3.7 fixedly mounted on the front end of the shaft 1.3.6 and meshing with the driving bevel gear 1.3.4, and three fixed supports mounted on the shaft 1.3.6. The busbar cabinet 1 includes four independent chambers: a fixed sleeve 1.3.8, a swing contact 1.3.9 radially fixed to the front end of the fixed sleeve 1.3.8 and electrically connected to the inner end of the outgoing contact 1.2, a swing lug 1.3.10 fixed to the rear end of the fixed sleeve 1.3.8, a fixed lug 1.3.11 fixed to the top of the side wall of the base plate 1.3.1 and corresponding to the swing lug 1.3.10, a tension spring 1.3.12 rotatably connected to the fixed lug 1.3.11 and the swing lug 1.3.10 at its top and bottom ends respectively, and a fixed contact 1.3.13 snapped into the end of the swing contact 1.3.9 and electrically connected to the input end of the output cable in the busbar cabinet 1. The rotating shaft head 1.3.3 is the driving end of the switch assembly 1.3. That is, the busbar cabinet 1 is equipped with four independent chambers, each chamber is modularly configured, and each module is fixed to the inner cavity of the busbar cabinet 1 with bolts. The four modules integrate components from the busbar compartment and cable compartment of a traditional high-voltage switchgear. These components include busbars, output cables, and surge arresters, zero-sequence current transformers, and grounding devices mounted on the output cable side. During closing or opening, the rotating shaft 1.3.3 rotates in the corresponding direction. The rotating shaft 1.3.3 drives the shaft 1.3.6 to rotate via the driving bevel gear 1.3.4 and the driven bevel gear 1.3.7. The shaft 1.3.6 then drives the swing contact 1.3.9 to swing through the fixed sleeve 1.3.8, achieving engagement and disengagement with the fixed contact 1.3.13. Specifically, during closing, the rotation of the shaft 1.3.6 must overcome the elastic resistance of the tension spring 1.3.12; during opening, the tension spring 1.3.12 causes the swing contact 1.3.9 to quickly return to the open position.

[0022] The handcart cabinets 2 are arranged in pairs on both sides of the busbar cabinet 1. Each handcart cabinet 2 has a handcart compartment 2.1 at its upper and lower parts. An operating chamber 2.2 is located on the lower side of each handcart compartment 2.1. Contact windows 2.6 are located on the inner wall of each handcart compartment 2.1 corresponding to the positions of the busbar contact 1.1 and the outgoing contact 1.2. A T-slot 2.4 is centrally located on the bottom surface of each handcart compartment 2. Lock holes 2.7 are located at the front and rear ends of the inner wall of each handcart cabinet 2. A smart control socket 2.5 is located on the top outer side of the inner cavity of each handcart compartment 2.1. A wiring socket 2.8, which is electrically connected to the smart control socket 2.5, is located on the inner wall of each handcart cabinet 2. Slide rails 2.3 are fixed to the front and rear sides of the bottom surface of the inner cavity of each handcart compartment 2.1. In other words, each of the two handcart cabinets 2 has two independent handcart compartments 2.1 and operating chambers 2.2 to facilitate the loading, unloading, and opening / closing operations of a single PT handcart 4.

[0023] The frame connector 3 includes a rectangular frame 3.1 located between the outer edges of the side walls of the busbar cabinet 1 and the handcart cabinet 2, and a mechanical locking mechanism 3.2 for fastening the rectangular frame 3.1 to the corresponding busbar cabinet 1 and handcart cabinet 2. The front and rear ends of the two side walls of the busbar cabinet 1 are each provided with multiple locking holes 1.4 vertically, and the front and rear ends of the inner side wall of the handcart cabinet 2 are each provided with locking holes 2.7. The mechanical locking mechanism 3.2 includes a threaded sleeve 3.2.5 fixedly fitted into the middle of the front and rear walls of the rectangular frame 3.1, a locking screw 3.2.6 threaded into the threaded sleeve 3.2.5, a linkage block 3.2.7 rotatably fitted into the inner end of the locking screw 3.2.6, and a pair of locking holes 1.4 and 2.7 respectively rotatably fitted onto the two side walls of the rectangular frame 3.1. The components include: a rotating shaft 3.2.1; a locking block 3.2.2 fixed at both ends of the rotating shaft 3.2.1 and correspondingly sleeved with lock hole 1.4 and lock hole 2.7; a swing arm 3.2.3 fixed at one end of the rotating shaft 3.2.1; a plate 3.2.4 extending vertically along the upper and lower sides of the middle of the front and rear inner cavity of the rectangular frame 3.1 and rotatably connected to the other end of the corresponding swing arm 3.2.3; and two connecting arms 3.2.8, one end of which is rotatably connected to the top and bottom of the linkage block 3.2.7 and the other end of which is rotatably connected to the end of the corresponding plate 3.2.4. The front end face of the locking screw 3.2.6 is provided with a groove that matches a special tool. Using the special tool to rotate the locking screw 3.2.6 causes it to screw in or out relative to the threaded sleeve 3.2.5. The linkage block 3.2.7 is pulled or pushed vertically by the connecting arm 3.2.8 or the push plate 3.2.4. The push plate 3.2.4 drives the rotating shaft 3.2.1 to rotate via the swing arm 3.2.3, and the rotating shaft 3.2.1 drives the locking block 3.2.2 to swing. When assembling and connecting the busbar cabinet 1 and the handcart cabinet 2, first, the lock holes 1.4 and 2.7 on the side walls of the busbar cabinet 1 and the handcart cabinet 2 are respectively fitted onto the corresponding locking blocks 3.2.2. Lock holes 1.4 and 2.7 are oblong holes, and the locking block 3.2.2 is a matching oblong plate. Lock block 3.2.2 passes through lock hole 1.4 and lock hole 2.7 respectively and corresponds to the inner cavity side wall of busbar cabinet 1 or the inner cavity side wall of handcart cabinet 2. Through the above operation, lock block 3.2.2 can be rotated relative to the lock hole, so that lock block 3.2.2 is correspondingly engaged with the inner cavity side wall of busbar cabinet 1 or the inner cavity side wall of handcart cabinet 2 to realize the locking process.

[0024] In addition, a vertical housing 3.3 is fixed in the middle of the inner cavity of the rectangular frame 3.1, and a wire outlet hole 3.3.1 is provided in the vertical housing 3.3 directly opposite the wiring socket 2.8. A connecting ring 3.4 is fixed in the middle of the top surface of the rectangular frame 3.1.

[0025] The inner wall of the PT trolley 4 is equipped with connecting contacts 4.1 that are respectively plugged into and matched with the busbar contacts 1.1 and the outgoing contacts 1.2, and the bottom of the PT trolley 4 is slidably engaged with the trolley compartment 2.1. The top of the PT trolley 4 is connected via a wiring harness to a smart control plug 4.2 that is plugged into the smart control socket 2.5. The bottom of the PT trolley 4 is fixed with a strip rail 4.3 that is slidably engaged with the slide rail 2.3. When assembling the PT trolley 4, a trolley is used to load the PT trolley 4 into the corresponding trolley compartment 2.1, and the strip rail 4.3 is slidably engaged with the slide rail 2.3. The PT trolley 4 is then pushed to the test position, and the smart control plug 4.2 is inserted into the smart control socket 2.5. The corresponding cabinet door of the trolley compartment 2.1 can then be closed to proceed to the next step.

[0026] Instrument cabinet 8 is located on top of one of the handcart cabinets 2, and a pipe fitting 8.1 is fixedly connected to the top surface of a rectangular frame 3.1 on its inner side. A connecting flange 8.2, which is fixedly connected to a connecting ring 3.4, is connected to the bottom of the pipe fitting 8.1. On the one hand, the fixed connection between the connecting flange 8.2 and the connecting ring 3.4 secures the instrument cabinet 8; on the other hand, the control lines of each intelligent control unit inside the instrument cabinet 8 pass through the pipe fitting 8.1 and the connecting flange 8.2, through the connecting ring 3.4, and then through the vertical housing 3.3 before connecting to the wiring socket 2.8 via the outlet hole 3.3.1.

[0027] The drive assembly 5 is installed inside the operating cavity 2.2 and integrates a push-pull drive mechanism and a transmission mechanism for triggering the drive end of the circuit breaker assembly 1.3; the linkage 6 is fixed to the bottom surface of the PT handcart 4 and is linked to the moving part of the push-pull drive mechanism in the drive assembly 5 through the T-slot 2.4. The drive assembly 5 includes a pull-out frame 5.1 fixedly inserted into the operating cavity 2.2, a drive screw 5.2 with both ends rotatably sleeved on the inner and outer side panels of the pull-out frame 5.1, a screw nut 5.3 threaded onto the drive screw 5.2, a push block 5.4 fixedly sleeved on the outside of the screw nut 5.3, and a guide rod 5.5 vertically fixed to the inner and outer side panels of the pull-out frame 5.1 and slidably sleeved with both ends of the push block 5.4. The top surface of the push block 5.4 has a centrally located... The T-slot 2.4 corresponds to the rectangular slot 5.4.1. The linkage 6 includes a base 6.1 fixed to the middle of the bottom surface of the PT handcart 4 by bolts. The base 6.1 has an L-shaped groove 6.1.1 in the middle. The straight groove of the L-shaped groove 6.1.1 is rotatably fitted with a rotating column 6.2. The inner end of the rotating column 6.2 is fixedly fitted with a lever 6.3 that is matched with the corner groove of the L-shaped groove 6.1.1. The lever 6.3 is matched with the rectangular slot 5.4.1 through the front end of the T-slot 2.4. The inner wall panel of the pull-out frame 5.1 is rotatably fitted with a closing prism 5.10, the inner end of which is axially fitted to the drive end of the circuit breaker assembly 1.3. The outer wall panel of the pull-out frame 5.1 is rotatably fitted with an operating prism 5.6, which is directly opposite the closing prism 5.10. A prism sleeve 5.7 is slidably fitted on the operating prism 5.6. A movable plate 5.8, extending to the inner front end of the push block 5.4, is rotatably fitted outside the prism sleeve 5.7. A guide rod 5.9 is fixed between the inner and outer wall panels of the pull-out frame 5.1, which is slidably fitted to the movable plate 5.8 near its front and rear ends. A return spring 5.11 is fitted on the part of the guide rod 5.9 located inside the movable plate 5.8. The ends of the prism sleeve 5.7 and the closing prism 5.10 are axially fitted to each other. Special tool operating slots are provided on the outer end faces of the rotating column 6.2, the drive screw 5.2, and the operating prism 5.6. That is, when the PT trolley 4 needs to be pushed to the working position, first use a special tool to rotate the rotating column 6.2. The rotating column 6.2 drives the lever 6.3 to rotate, and the lever 6.3 is precisely engaged in the rectangular groove 5.4.1 through the front end of the T-slot 2.4. Then, by rotating the special tool, the lead screw 5.2 is driven. The lead screw 5.2 drives the pusher block 8.4 to slide inward under the guidance of the guide rod 5.5 through the lead screw nut 5.3. This achieves the pushing of the PT trolley 4. In addition, while the pusher plate 8.4 slides inward, it pushes the movable plate 5.8 to slide inward under the guidance of the guide rod 5.9.When the PT trolley 4 moves to the working position, the rear end of the prism sleeve 5.7 is just inserted into the closing prism 5.10. By rotating the operating prism 5.6 with a special tool, the operating prism 5.6, the prism sleeve 5.7 and the closing prism 5.10 can be rotated synchronously. The closing prism 5.10 drives the rotating shaft head 1.3.3 to rotate, so as to realize the opening and closing operation.

[0028] The sealing door assembly 7 is used to keep the contact window 2.6 normally closed and to open the contact window 2.6 when pushed by the PT trolley 4. The sealing door assembly 7 includes mounting bases 7.4 fixed to the top and bottom of the front and rear parts of the inner wall of the trolley compartment 2.1, vertical rods 7.1 fixed to the top and bottom of the mounting bases 7.4, end blocks 7.2 slidably fitted on the upper and lower sides of the middle part of the vertical rods 7.1, sealing plates 7.3 fixedly connected to the corresponding end blocks 7.2 at the front and rear ends and sealing the contact window 2.6, L-shaped rails 7.6 fixed to the middle of the front and rear walls of the trolley compartment 2.1 and extending horizontally, trigger blocks 7.7 with their bottom ends slidably engaged with the L-shaped rails 7.6, connecting rods 7.8 with their outer ends rotatably connected to the top of the trigger blocks 7.7 and their inner ends rotatably connected to the corresponding end blocks 7.2, and compression springs 7.5 fitted on the top and bottom of the vertical rods 7.1. The front and rear walls of the PT trolley 4 are respectively provided with slots that match the sliding engagement of the L-shaped rails 7.6. Additionally, the top surface of the L-shaped rail 7.6 has a strip groove 7.6.1 along its axial direction, and the bottom end of the trigger block 7.7 is slidably engaged with the strip groove 7.6.1. During the process of pushing the PT trolley 4 from the test position to the working position, the PT trolley 4 pushes the trigger block 7.7 inward. The trigger block 7.7 moves up and down by pushing the end block 7.2 through the connecting rod 7.8, which presses against the compression spring 7.5. This causes the two sealing plates 7.3 to move up and down, exposing the two contact windows 2.6 to facilitate the corresponding insertion of the connecting contact 4.1 with the busbar contact 1.1 and the outgoing contact 1.2. When the PT trolley 4 is removed, the compression spring 7.5 again re-closes the contact windows 2.6 through the pushing end block 7.2. A limiting ring is provided on the vertical rod 7.1 to limit the end block 7.2, ensuring that the sealing plate 7.3 completely covers the contact windows 2.6 in a centered position.

[0029] It should be noted that in this article, relational terms such as first and second are only used to refer to... Distinguishing one entity or operation from another does not necessarily require or imply any such actual relationship or order between those entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent modular 12 / 24kV switchgear, characterized in that, include: The busbar cabinet (1) has a pair of busbar contacts (1.1) and outgoing contacts (1.2) on the upper and lower sides of the middle of the two side walls. The inner cavity of the busbar cabinet (1) is provided with four sets of busbars and output cables that are respectively connected to the busbar contacts (1.1) and outgoing contacts (1.2), as well as a switch assembly (1.3) for closing each set of busbars and output cables. The driving end of the switch assembly (1.3) is rotatably fitted onto the two side walls of the busbar cabinet (1). Handcart cabinets (2) are arranged in pairs on both sides of the busbar cabinet (1). The upper and lower parts of the handcart cabinet (2) are respectively provided with handcart compartments (2.1). The lower side of the handcart compartment (2.1) is provided with an operating cavity (2.2). The inner side wall of the handcart compartment (2.1) is provided with contact windows (2.6) corresponding to the positions of the busbar contact (1.1) and the outgoing contact (1.2). The bottom surface of the handcart compartment (2.1) is provided with a T-slot (2.4). The frame connector (3) includes a rectangular frame (3.1) disposed between the outer edges of the side walls of the busbar cabinet (1) and the handcart cabinet (2) and a mechanical locking mechanism (3.2) for fastening the rectangular frame (3.1) to the corresponding busbar cabinet (1) and handcart cabinet (2). The PT handcart (4) has a connecting contact (4.1) on its inner side wall that is respectively plugged into and matched with the busbar contact (1.1) and the outgoing contact (1.2), and its bottom is slidably engaged with the handcart compartment (2.1); The drive assembly (5) is installed in the operating cavity (2.2) and integrates a push-pull drive mechanism and a transmission mechanism for triggering the drive end of the switch assembly (1.3); Linkage component (6) is fixed to the bottom surface of the PT handcart (4) and is linked to the moving part of the push-pull drive mechanism in the drive assembly (5) through the T-slot (2.4); The sealing door assembly (7) is used to keep the contact window (2.6) normally closed and to open the contact window (2.6) when pushed by the PT handcart (4). An instrument cabinet (8) is located on the top of one of the handcart cabinets (2) and has a pipe fitting (8.1) fixedly connected to the top surface of the rectangular frame (3.1) on its inner side.

2. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The circuit breaker assembly (1.3) includes a base plate (1.3.1) bolted to the inner wall of the busbar cabinet (1), a bearing seat (1.3.2) fixed to the bottom front end of the base plate (1.3.1), a rotating shaft head (1.3.3) rotatably mounted on the bearing seat (1.3.2) and with its outer end penetrating the side wall of the busbar cabinet (1), a driving bevel gear (1.3.4) fixedly mounted on the inner end of the rotating shaft head (1.3.3), multiple supports (1.3.5) longitudinally fixed to the bottom of the side wall of the base plate (1.3.1), a shaft (1.3.6) rotatably mounted on the support (1.3.5), a driven bevel gear (1.3.7) fixedly mounted on the front end of the shaft (1.3.6) and meshing with the driving bevel gear (1.3.4), and three fixed supports fixedly mounted on the shaft (1.3.6). The fixed sleeve (1.3.8), the swing contact (1.3.9) which is radially fixed to the front end of the fixed sleeve (1.3.8) and electrically connected to the inner end of the outgoing contact (1.2), the swing ear (1.3.10) which is fixed to the rear end of the fixed sleeve (1.3.8), the fixed ear (1.3.11) which is fixed to the top of the side wall of the base plate (1.3.1) and corresponds one-to-one with the swing ear (1.3.10), the tension spring (1.3.12) which is rotatably connected to the fixed ear (1.3.11) and the swing ear (1.3.10) respectively at its top and bottom ends, and the fixed contact (1.3.13) which is snapped and matched with the end of the swing contact (1.3.9) and electrically connected to the input end of the output cable in the bus cabinet (1), and the rotating shaft head (1.3.3) is the driving end of the switch assembly (1.3).

3. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The front and rear ends of the two side walls of the busbar cabinet (1) are provided with multiple lock holes 1 (1.4) vertically, and the front and rear ends of the inner side wall of the handcart cabinet (2) are provided with lock holes 2 (2.7). The mechanical locking mechanism (3.2) includes a threaded sleeve (3.2.5) fixedly fitted in the middle of the front and rear walls of the rectangular frame (3.1), a locking screw (3.2.6) threaded into the threaded sleeve (3.2.5), a linkage block (3.2.7) rotatably fitted into the inner end of the locking screw (3.2.6), and two ends rotatably fitted into the two side walls of the rectangular frame (3.1) and corresponding to the lock holes 1 (1.4) and 2 (2.7). The corresponding rotating shaft (3.2.1), the locking block (3.2.2) fixed at both ends of the rotating shaft (3.2.1) and correspondingly sleeved with the first lock hole (1.4) and the second lock hole (2.7), the swing arm (3.2.3) fixedly sleeved at one end of the rotating shaft (3.2.1), the plate strip (3.2.4) extending vertically along the upper and lower sides of the middle of the front and rear inner cavity of the rectangular frame (3.1) and rotatably connected to the other end of the corresponding swing arm (3.2.3), and two connecting arms (3.2.8) rotatably connected at one end to the top and bottom of the linkage block (3.2.7) and rotatably connected at the other end to the end of the corresponding plate strip (3.2.4).

4. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The drive assembly (5) includes a pull-out frame (5.1) fixedly inserted into the operating cavity (2.2), a drive screw (5.2) with both ends rotatably sleeved on the inner and outer side walls of the pull-out frame (5.1), a screw nut (5.3) threaded onto the drive screw (5.2), a push block (5.4) fixedly sleeved on the screw nut (5.3) in the middle, and a guide rod (5.5) with both ends vertically fixed to the inner and outer side walls of the pull-out frame (5.1) and slidably sleeved with both ends of the push block (5.4). The push block (5.4) has a rectangular groove (5.4.1) in the center of its top surface, corresponding to the T-shaped groove (2.4). The linkage (6) includes a base (6.1) fixed to the center of the bottom surface of the PT handcart (4) with bolts. The base (6.1) has an L-shaped groove in the center. 6.1.1), the inner cavity of the straight groove portion of the L-shaped groove (6.1.1) is rotatably fitted with a rotating post (6.2), and the inner end of the rotating post (6.2) is fixedly sleeved with a part that is connected to the L-shaped groove (6.1.1). 6.1.1) The corner groove part is engaged with the matching paddle (6.3), and the paddle (6.3) is engaged with the rectangular groove (5.4.1) through the front end of the T-slot (2.4).

5. The intelligent modular 12 / 24kV switchgear according to claim 4, characterized in that: The inner wall panel of the pull-out frame (5.1) is rotatably fitted with a closing prism (5.10) whose inner end is axially fitted to the drive end of the circuit breaker assembly (1.3). The outer wall panel of the pull-out frame (5.1) is rotatably fitted with an operating prism (5.6) that is directly opposite the closing prism (5.10). A prism sleeve (5.7) is slidably fitted on the operating prism (5.6). A movable plate (5.8) extending to the inner front end of the push block (5.4) is rotatably fitted on the outer side of the prism sleeve (5.7). A guide rod (5.9) is fixed between the inner and outer wall panels of the pull-out frame (5.1) and slidably fitted to the movable plate (5.8) near the front and rear ends. A return spring (5.11) is fitted on the part of the guide rod (5.9) located inside the movable plate (5.8). The ends of the prism sleeve (5.7) and the closing prism (5.10) are axially fitted together.

6. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The closed door assembly (7) includes mounting bases (7.4) fixed to the front and rear top and bottom ends of the inner side wall of the handcart compartment (2.1), vertical rods (7.1) fixed to the top and bottom ends of the mounting bases (7.4) respectively, end blocks (7.2) slidably fitted on the upper and lower sides of the middle part of the vertical rods (7.1), sealing plates (7.3) fixedly connected to the corresponding end blocks (7.2) at the front and rear ends respectively and closing the contact window (2.6), and fixed to the handcart compartment (2.1). The front and rear walls are provided with an L-shaped rail (7.6) extending horizontally in the middle, a trigger block (7.7) whose bottom end is slidably engaged with the L-shaped rail (7.6), a connecting rod (7.8) whose outer end is rotatably connected to the top of the trigger block (7.7) and whose inner end is rotatably connected to the corresponding end block (7.2), and a compression spring (7.5) fitted on the top and bottom of the vertical rod (7.1). The front and rear walls of the PT handcart (4) are respectively provided with slots that are slidably engaged with the L-shaped rail (7.6).

7. The intelligent modular 12 / 24kV switchgear according to claim 6, characterized in that: The top surface of the L-shaped rail (7.6) is provided with a strip groove (7.6.1) along its axial direction, and the bottom end of the trigger block (7.7) is slidably engaged with the strip groove (7.6.1).

8. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The top of the outer side of the inner cavity of the handcart compartment (2.1) is provided with a smart control socket (2.5). The top of the PT handcart (4) is connected by a wire harness to a smart control plug (4.2) that matches the smart control socket (2.5). The inner side wall of the handcart cabinet (2) is provided with a wiring socket (2.8) that is electrically connected to the smart control socket (2.5). A vertical shell (3.3) is fixed in the middle of the inner cavity of the rectangular frame (3.1). The vertical shell (3.3) is provided with a wire outlet hole (3.3.1) opposite to the wiring socket (2.8).

9. The intelligent modular 12 / 24kV switchgear according to claim 8, characterized in that: A connecting ring (3.4) is fixed in the middle of the top surface of the rectangular frame (3.1), and a connecting flange (8.2) is fixedly connected to the connecting ring (3.4) at the bottom of the pipe fitting (8.1).

10. The intelligent modular 12 / 24kV switchgear according to claim 1, characterized in that: The front and rear sides of the bottom surface of the inner cavity of the handcart compartment (2.1) are respectively fixed with slide rails (2.3), and the bottom surface of the PT handcart (4) is fixed with a strip rail (4.3) that slides and matches the slide rail (2.3).

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