A modular high-efficiency power distribution cabinet

Abstract

The present invention relates to a modular high-efficiency power distribution cabinet applied to the technical field of power distribution cabinets. The power distribution cabinet is composed of standardized functional modules. The modules can be flexibly plugged and combined to facilitate system expansion and rapid reconstruction. The electrical equipment is connected to the busbar conductive strip by rotating the terminal post without bolt crimping. The assembly is quick and reliable. The wiring component has a built-in multi-stage elastic crimping mechanism, which can automatically adjust the center and adapt to larger assembly errors. The fully enclosed insulating shell and partition have a high overall protection level, are flame-retardant and heat-insulating, and can operate safely in harsh environments. The isolation shell cooperates with the pressure release sealing plate to form a second line of defense in the event of a fault. The liquid cooling heat dissipation system is composed of a liquid-filled heat conductive plate and a cooling box. It has high heat exchange efficiency and strong heat dissipation capacity. It can be modularly matched with the load. While ensuring safety and reliability, it takes into account convenience and maintainability. The power distribution cabinet has strong versatility and low manufacturing cost and can be widely used in the field of industrial power distribution.

Description

Technical Field

[0001] The present invention relates to a modular high-efficiency power distribution cabinet, and in particular to a modular high-efficiency power distribution cabinet applied in the technical field of power distribution cabinets. Background Art

[0002] With the continuous improvement of industrial automation, the number and capacity of loads in low-voltage power distribution systems are increasing, which puts higher requirements on the safety, reliability, flexibility and heat dissipation of power distribution cabinets. Traditional fixed and closed power distribution cabinets can no longer meet the needs of modern industrial production.

[0003] Chinese invention patent CN107134726B discloses an intelligent modular low-voltage power distribution cabinet, which adopts a standard modular design. Circuit components are quickly connected in series through through holes and screws on the shell, without the need for secondary wiring. It is safe and reliable, and easy to maintain and expand. However, its heat dissipation measures are insufficient. Under high current conditions, the temperature inside the shell rises high, posing a safety hazard. In addition, the sealing and insulation of the screw connections between the shells are not ideal.

[0004] Chinese invention patent CN113178788B discloses an integrated modular power distribution cabinet, which improves the integration and modularity of electrical equipment through modular integration mechanism and electrical integrated fixed structure, and facilitates maintenance and management. However, it lacks targeted design for the installation, wiring and heat dissipation of electrical equipment, and its practicality and reliability need to be improved.

[0005] The above patents have made useful explorations in modularization and integration, but they are still insufficient in terms of safety protection, heat dissipation, and wiring convenience. At present, the industrial field has put forward new requirements for power distribution cabinets: they must be highly modularized and standardized, easy to flexibly combine and install on site; they must also be safe and reliable, have a high level of protection, and be able to adapt to harsh environments. Summary of the invention

[0006] The purpose of the present invention is to provide a modular high-efficiency power distribution cabinet to solve the above-mentioned technical problems in view of the deficiencies in the prior art.

[0007] In order to solve the above problems, the present invention provides a modular high-efficiency power distribution cabinet, including a cabinet body, the cabinet body is composed of a plurality of modules distributed in an array, and the plurality of modules each include a first fixing frame, and the positions near the top and the bottom of the first fixing frame are respectively fixedly connected to an upper wiring frame and a lower wiring frame symmetrically arranged up and down through a rotating shaft, and an electrical device is fixedly connected between the symmetrically arranged upper wiring frame and the lower wiring frame, and a second fixing frame is fixedly connected to the first fixing frame, and an upper wire group and a lower wire group symmetrically arranged up and down are fixedly connected to the first fixing frame and the second fixing frame at one end away from the electrical device, and the upper wiring frame The upper and lower wiring frames are electrically connected to the upper wire group and the lower wire group respectively, a cooling box is fixedly connected between the upper wire group and the lower wire group, a heat conductive block is fixedly connected between the cooling box and the electrical equipment, a heat conductive plate is clamped at one end of the cooling box away from the electrical equipment, an isolation shell symmetrically arranged on the left and right is clamped at the outer end of the first fixed frame, a sealing plate is clamped at one end of the symmetrically arranged isolation shell away from the heat conductive plate, the cooling box and the heat conductive plate are both hollow structures, and the hollow parts are filled with silicone oil, the cooling box and the heat conductive plate as well as two adjacent heat conductive plates are connected by quick connectors, and the cooling box will melt when the temperature exceeds a threshold.

[0008] As a further improvement of the present application, the first fixing frame includes a plurality of bracket plates, the second fixing frame includes a plurality of partitions, a partition is fixedly connected between two adjacent bracket plates, and the number of partitions is one less than the bracket plates, the upper wire group and the lower wire group are both electrically connected to external equipment, and the heat conducting plate located at the outermost end is connected to the outside through a quick connector.

[0009] As a further improvement of the present application, the upper wiring rack and the lower wiring rack both include a plurality of wiring posts fixedly connected to the wiring ports of the electrical equipment. The wiring posts on the upper wiring rack and the lower wiring rack are arranged one-to-one corresponding to the interfaces of the electrical equipment, and the number of partitions is equal to the number of wiring posts on the upper wiring rack.

[0010] As a further improvement of the present application, multiple terminal posts are rotatably connected to the bracket plate via a rotating shaft, and multiple terminal posts include a rotating column rotatably connected to the outer end of the rotating shaft, a sliding groove matching the outer end of the rotating shaft is provided in the rotating column, and the rotating shaft can slide in the sliding groove, so that the position of the rotating column can be adjusted through the sliding groove, so that the terminal posts can adapt to different electrical equipment.

[0011] As another improvement of the present application, a conductive strip is fixedly connected to the outer end of the rotating column, a contact column is slidably connected to one end of the conductive strip close to the electrical equipment, a retaining ring is fixedly connected to the bottom end of the contact column, and a pull block is fixedly connected to the bottom end of the retaining ring.

[0012] As another improved supplement of the present application, the contact column penetrates the conductive strip upward, and the outer end of the penetrating portion is threadedly connected with an adjusting bolt, a spring is fixedly connected between the conductive strip and the adjusting bolt, and the spring is a conical structure.

[0013] As another improved supplement to the present application, the top of the contact column is fixedly connected to the interface of the electrical equipment, the outer end of the contact column located between the electrical equipment and the adjusting bolt is fixedly connected to a first conductive belt, the end of the first conductive belt away from the contact column is fixedly connected to the conductive strip, the conductive strip and the contact column are both made of pure copper, and the first conductive belt is made of pure copper braiding.

[0014] As another improvement of the present application, a rotating fixing column is fixedly connected between the conductive bar and the electrical equipment. One end of the rotating fixing column close to the electrical equipment is threadedly connected to the electrical equipment via a fixing bolt. The rotating fixing column is made of insulating material.

[0015] The upper wire group and the lower wire group are both composed of multiple wires. The end of each conductive strip away from the contact column is electrically connected to the wires on the corresponding upper wire group and lower wire group through a second conductive strip. The second conductive strip is made of pure copper braiding. The rotating fixed column is located between the first conductive strip and the second conductive strip near the end of the conductive strip.

[0016] The first fixing frame, the second fixing frame and the isolation shell are all provided with openings at one end close to the heat conducting plate, the openings are used to slide the upper wire group, the lower wire group and the cooling box, a handle is fixedly connected to the top of the sealing plate, and a through hole is provided in the handle, and the isolation shell is made of high temperature resistant insulating material.

[0017] In summary, this application has the following beneficial effects:

[0018] 1. The modular design concept enables the power distribution cabinet to be flexibly combined and quickly reconstructed. Each functional module, such as the busbar room, circuit breaker room, capacitor room, etc., is independent in structure, highly integrated in layout, and pluggable in function, realizing standardized design, serialized production, modular assembly, and configuration selection. Users can select and configure modules as needed to form a complete power distribution solution, which greatly improves the applicability and reusability of the product.

[0019] 2. The terminal and the conductive strip adopt a rotating connection structure, which can be rotated within a certain angle range, which is convenient for adjusting the posture during installation and automatically aligning the terminal hole of the electrical equipment, reducing the difficulty of assembly. The upper and lower symmetrical wiring rack arrangement allows the electrical equipment to be inserted in both directions, avoiding the tediousness and errors of on-site wiring. The traditional bolt crimping process is eliminated, greatly improving the installation efficiency.

[0020] 3. The wiring component has a built-in multi-stage elastic crimping mechanism. When the assembly error is large, the spring can automatically adjust the center so that the contact column and the terminal hole always remain coaxial, weakening the requirements for manufacturing and assembly accuracy. The contact column uses a conical bullet and a double spring, which can generate a large contact pressure, effectively overcome adverse factors such as vibration and impact, and ensure that the electrical contact is stable and reliable.

[0021] 4. The fully enclosed and fully insulated box structure, the isolation shell and the partition seal all the live parts inside, even in a humid and dusty environment, it will not cause faults such as creepage and flashover, and the overall protection level can reach IP67. The application of thermal insulation cotton and flame retardant further improves the fireproof performance. High-strength SMC, silicone rubber and other materials are used in key parts, which can still maintain mechanical strength and insulation performance under the action of high temperature and corrosive gas, and have a long service life.

[0022] 5. The combination of the isolation housing and the sealing plate constitutes the second line of defense for electrical equipment. When electrical equipment fails, arcs or catches fire, the sealing plate can block high-temperature smoke and delay the spread of fire. The pressure release holes reserved on the sealing plate can release the pressure difference caused by thermal expansion and contraction, reducing the risk of explosion. At the same time, it also provides a channel for the injection of fire extinguishing agents.

[0023] 6. The liquid cooling system, including liquid-filled heat conduction plates, fin cooling boxes and fans, can efficiently absorb the heat generated by electrical components and quickly transfer it to the cooling box. Through forced convection with the outside air, it continuously discharges heat, effectively suppressing the accumulation of heat in the cabinet and keeping the temperature rise of all parts of the distribution cabinet within a safe range.

[0024] 7. The coolant circuit with a rectangular cross section has a short and thick flow channel and small liquid resistance, which is conducive to the formation of turbulence and enhanced heat exchange. The series arrangement allows the coolant to flow through each heat-generating component in turn, gradually increasing the temperature, with a large heat exchange temperature difference and good heat transfer effect. The modular heat dissipation concept can flexibly increase or decrease the number of cooling boxes according to the load conditions to optimize the heat dissipation and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the overall structure diagram of this application;

[0026] Figure 2 This is the front view of the application;

[0027] Figure 3 For this application Figure 2 Middle AA section view;

[0028] Figure 4 This is an overall exploded view of this application;

[0029] Figure 5 A partial exploded view of this application;

[0030] Figure 6 This is a front view of the module of this application;

[0031] Figure 7 For this application Figure 6 Middle BB section view;

[0032] Figure 8 For this application Figure 7 Middle CC section view;

[0033] Fig. 9 This is an overall exploded view of the module of this application;

[0034] Fig.10 The module for this application is partially exploded Figure 1 ;

[0035] Fig.11 The module for this application is partially exploded Figure 2 ;

[0036] Fig.12 The module for this application is partially exploded Figure 3 ;

[0037] Fig.13 The module for this application is partially exploded Figure 4 ;

[0038] Fig.14 The module for this application is partially exploded Figure 5 ;

[0039] Fig.15 The module for this application is partially exploded Figure 6 .

[0040] Description of the numbers in the figure:

[0041] 1. First fixed frame; 2. Rotating shaft; 3. Upper terminal frame; 4. Lower terminal frame; 5. Electrical equipment; 6. Second fixed frame; 7. Upper wire group; 8. Lower wire group; 9. Cooling box; 10. Heat conducting plate; 11. Isolation shell; 12. Sealing plate; 13. Support plate; 14. Partition; 15. Terminal; 16. Rotating column; 17. Conductive strip; 18. Contact column; 19. Adjusting bolt; 20. First conductive belt; 21. Rotating fixed column; 22. Second conductive belt. DETAILED DESCRIPTION

[0042] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0043] Example 1

[0044] Figures 1 to 15As shown, this embodiment provides a modular high-efficiency power distribution cabinet, including a cabinet body, which is composed of a plurality of modules distributed in an array, and the plurality of modules all include a first fixed frame 1, and the positions near the top and bottom ends of the first fixed frame 1 are respectively fixedly connected to an upper wiring frame 3 and a lower wiring frame 4 symmetrically arranged up and down through a rotating shaft 2, and an electrical device 5 is fixedly connected between the symmetrically arranged upper wiring frame 3 and the lower wiring frame 4, and a second fixed frame 6 is fixedly connected to the first fixed frame 1, and an upper wire group 7 and a lower wire group 8 symmetrically arranged up and down are fixedly connected at one end of the first fixed frame 1 and the second fixed frame 6 away from the electrical device 5, and the upper wiring frame 3 and the lower wiring frame 4 are respectively connected to The upper wire group 7 and the lower wire group 8 are electrically connected, a cooling box 9 is fixedly connected between the upper wire group 7 and the lower wire group 8, a heat conductive block is fixedly connected between the cooling box 9 and the electrical equipment 5, a heat conductive plate 10 is clamped on the end of the cooling box 9 away from the electrical equipment 5, an isolation shell 11 symmetrically arranged on the left and right is clamped on the outer end of the first fixed frame 1, a sealing plate 12 is clamped on the end of the symmetrically arranged isolation shell 11 away from the heat conductive plate 10, the cooling box 9 and the heat conductive plate 10 are both hollow structures, and the hollow parts are filled with silicone oil, the cooling box 9 and the heat conductive plate 10 as well as two adjacent heat conductive plates 10 are connected by quick connectors, and the cooling box 9 will melt when the temperature exceeds a threshold.

[0045] The modular high-efficiency power distribution cabinet of this embodiment adopts a layered modular structure design. The cabinet body is composed of multiple modules of standard size, and the modules are arranged in an array, which can be flexibly added or deleted according to actual needs. Each module is mainly composed of a first fixing frame 1, a second fixing frame 6, an upper wire group 7, a lower wire group 8, a cooling box 9, a heat conducting plate 10, an isolation shell 11 and a sealing plate 12.

[0046] The first fixing frame 1 is the main frame of the module, and is provided with an upper wiring frame 3 and a lower wiring frame 4 which are symmetrical in the upper and lower directions, and are rotatably connected to the top and bottom ends of the first fixing frame 1 through a rotating shaft 2. The electrical equipment 5 is fixed between the upper wiring frame 3 and the lower wiring frame 4. A second fixing frame 6 is also fixed in the first fixing frame 1 to support and fix other components.

[0047] The upper wire group 7 and the lower wire group 8 are symmetrically arranged at the end of the first fixing frame 1 and the second fixing frame 6 away from the electrical equipment 5, and are electrically connected to the upper wiring frame 3 and the lower wiring frame 4 respectively, and can be connected to an external power supply system. A hollow cooling box 9 is provided between the upper wire group 7 and the lower wire group 8, and is filled with heat-conducting silicone oil. A heat-conducting block is provided between the electrical equipment 5 and the cooling box 9, and the heat-conducting plate 10 is also a hollow structure and filled with silicone oil, which is connected to the cooling box 9 through a quick connector, and adjacent heat-conducting plates 10 are also connected through quick connectors to form a cooling circuit.

[0048] A bilaterally symmetrical isolation shell 11 is provided on the outside of the first fixing frame 1. The isolation shell 11 is made of high temperature resistant insulating material and can be quickly assembled and disassembled with the first fixing frame 1 by means of a snap connection. The isolation shell 11 is provided with an opening that cooperates with the heat conducting plate 10, the cooling box 9 and the wire group. A detachable sealing plate 12 is provided on the side of the isolation shell 11 away from the heat conducting plate 10. The sealing plate 12 is provided with a through hole for discharging high temperature gas generated by a failure of the electrical equipment 5.

[0049] The first fixing frame 1 includes a plurality of vertically parallel bracket plates 13, and the second fixing frame 6 includes a plurality of partitions 14 perpendicular to the bracket plates 13. The number of partitions 14 is one less than that of the bracket plates 13, and they are staggered to divide the interior of the module into a plurality of compartments, which respectively accommodate components such as the wiring rack, the wire group and the cooling box 9. The upper wire group 7 and the lower wire group 8 are connected to the external power supply through wires. The outermost heat conducting plate 10 can be connected to the outdoor heat dissipation device through a quick connector, and the redundant quick connector can also be sealed with a plug. The thermal conductive silicone oil uses organic silicone oil with a thermal conductivity greater than 0.15w / m·k, which can work stably in the range of -60℃ to 250℃. The cooling box 9 is made of a low melting point alloy, which melts at about 150℃ to protect the module.

[0050] According to load requirements and site layout, multiple modules are connected to form a power distribution cabinet through flanges or bolts of the first fixing frame 1. According to the circuit design, the required number of upper wire groups 7 and lower wire groups 8 are installed in the first fixing frame 1 and connected to the external power supply.

[0051] The upper wiring frame 3 and the lower wiring frame 4 are mounted on the support plate 13 and the partition plate 14, and the terminal posts 15 are electrically connected to the corresponding upper wire group 7 and the lower wire group 8 through conductive tapes.

[0052] Fill the hollow cavities of the cooling box 9 and the heat conducting plate 10 with heat conducting silicone oil and connect them in sequence through quick connectors. Manually adjust the terminal posts 15 on the upper terminal frame 3 and the lower terminal frame 4 to the uppermost position. If necessary, connect an outdoor heat dissipation device to the outermost heat conducting plate 10.

[0053] Align the mounting holes of the electrical equipment 5 to be installed, such as a circuit breaker, a contactor, etc., with the rotating fixing columns 21 on the upper and lower wiring racks 3 and 4, and fix them with bolts. Loosen the fastening screws on the inlet and outlet terminals of the electrical equipment 5.

[0054] The electrical device 5 is pushed to be inserted between the upper and lower wiring frames 3 and 4, so that the rotating fixing column 21 pushes the wiring component to rotate, and is quickly inserted into the terminal hole of the electrical device 5 and pressed.

[0055] Tighten the terminal fastening screws to complete the installation and wiring of the electrical device 5. Clamp the isolation housing 11 and the sealing plate 12 onto the periphery of the module to complete the assembly of a single module.

[0056] The modular design ensures that each module has a compact structure and uniform size, and can be mass-produced, allowing for flexible combination of multiple modules to build distribution cabinets of different specifications to suit a variety of application scenarios.

[0057] The main components are all assembled quickly without bolts, such as the isolation shell 11 is snap-fitted to the first fixing frame 1, the wiring frame is hinged to the first fixing frame 1 through the rotating shaft 2, and the heat conducting plates 10 are quickly connected, which greatly improves the assembly efficiency and facilitates rapid construction and replacement.

[0058] The electrical device 5 is installed between the rotatable upper and lower wiring frames 3 and 4. The wiring terminals are tightened by rotating the fixing column 21 and the spring, and there is no need to fix the wires with screws, thus avoiding the poor contact problem caused by loosening of the terminal screws due to vibration and improving reliability.

[0059] The interior of the power distribution cabinet adopts a fully enclosed structure, and the components are separated by an isolation shell 11 and a sealing plate 12, which prevents the arc, high temperature, toxic gas, etc. from spreading outward, greatly improving the safety performance.

[0060] The heat-conducting silicone oil cooling system is composed of a cooling box 9, a heat-conducting plate 10, etc., which wraps the electrical equipment 5 and the wire group, can effectively absorb the internal heat and reduce the working temperature. When the electrical equipment 5 fails, the cooling box 9 can melt and release pressure to prevent explosion.

[0061] The upper and lower wire groups 7 and 8 are installed in a plug-in manner, and the wire specifications and number can be flexibly selected according to the capacity of the electrical equipment 5 and the circuit design to avoid waste and reduce costs. The outermost heat conducting plate 10 can be selectively connected to an outdoor heat dissipation device to further enhance heat dissipation and adapt to high temperature environments.

[0062] The power distribution cabinet has a novel and reasonable structure, is safe and reliable, has good heat dissipation, a high degree of modularization, is easy to assemble and maintain, and has a low cost, and is conducive to promotion and application.

[0063] Example 2

[0064] Figures 1 to 15 It is shown that, based on Example 1, this embodiment provides a wiring structure of a modular high-efficiency power distribution cabinet, and the upper wiring rack 3 and the lower wiring rack 4 each include a plurality of wiring posts 15 fixedly connected to the wiring terminal ports of the electrical equipment 5. The wiring posts 15 on the upper wiring rack 3 and the lower wiring rack 4 are arranged in a one-to-one correspondence with the terminal ports of the electrical equipment 5. The number of partitions 14 of the second fixing frame 6 is equal to the number of wiring posts 15 on the upper wiring rack 3, and each wiring post 15 is located between two adjacent partitions 14.

[0065] A plurality of terminals 15 are rotatably connected to the bracket plate 13 of the first fixing frame 1 via the rotating shaft 2. Each terminal 15 includes a rotating column 16, a conductive strip 17, a contact column 18, an adjusting bolt 19, a spring, a first conductive belt 20 and a rotating fixing column 21.

[0066] The rotating column 16 is mounted on the rotating shaft 2, and a slide groove is provided inside along the axial direction of the rotating shaft 2. The rotating shaft 2 can slide axially in the slide groove, which is convenient for adjusting the axial position of the rotating column 16, so that the terminal 15 can be extended and retracted as a whole to adapt to the terminal position of electrical equipment 5 of different models.

[0067] The end of the rotating column 16 away from the rotating shaft 2 is fixedly connected to the conductive bar 17. The end of the conductive bar 17 close to the electrical device 5 is slidably connected to the contact column 18, and the contact column 18 can slide axially along the conductive bar 17. A retaining ring is fixed at the bottom end of the contact column 18, and a pulling block is fixed at the bottom end of the retaining ring for pulling the contact column 18 to reset upward.

[0068] The contact column 18 passes through the conductive strip 17 upward, and the outer end of the part exposed above the conductive strip 17 is connected to the adjusting bolt 19 through a thread. A conical spring is installed between the conductive strip 17 and the adjusting bolt 19, and the adjusting bolt 19 can compress the spring and push the contact column 18.

[0069] The top of the contact column 18 is fixedly connected to the terminal of the electrical device 5. A first conductive strip 20 is welded to the upper outer wall of the contact column 18, and one end of the first conductive strip 20 away from the contact column 18 is welded to the conductive strip 17. The conductive strip 17 and the contact column 18 are made of copper material with excellent conductive properties, and the first conductive strip 20 is woven from multiple strands of fine copper wires, which has better conductivity and flexibility.

[0070] The end of the conductive strip 17 close to the electrical device 5 is fixedly connected to the housing of the electrical device 5 through a rotating fixed column 21. The end of the rotating fixed column 21 away from the conductive strip 17 is provided with a through hole, which is matched with a threaded hole on the housing of the electrical device 5 and fixed by a bolt. The rotating fixed column 21 is made of insulating material so that the conductive strip 17 can rotate around the rotating fixed column 21. The rotating fixed column 21 is located between the first conductive strip 20 and the second conductive strip 22.

[0071] The end of the conductive strip 17 away from the contact column 18 is welded with a second conductive strip 22, and the end of the second conductive strip 22 away from the conductive strip 17 is welded to the wire of the upper wire group 7 or the lower wire group 8. The upper wire group 7 and the lower wire group 8 are both composed of multiple bare copper wires, and the conductive cross-sectional area can be increased by parallel connection. The second conductive strip 22 is also woven with multiple strands of fine copper wire.

[0072] After several modules are assembled into a power distribution cabinet, a corresponding number of upper wiring racks 3 and lower wiring racks 4 are selected and installed in the modules according to the number of wiring terminals of the electrical equipment 5 .

[0073] According to the rated current of the electrical device 5, an upper wire group 7 and a lower wire group 8 with sufficient cross-sectional area are selected, inserted into the wire groove reserved in the first fixing frame 1, and connected with the external power supply wire.

[0074] One end of a plurality of second conductive strips 22 is fixed to the exposed wires of the upper wire group 7 and the lower wire group 8 by rivets or screws, and the other end is welded to the corresponding conductive strips 17 to complete the connection between the upper and lower wiring frames and the incoming and outgoing wires.

[0075] The adjusting bolt 19 is turned to initially compress the spring, and the top of the contact column 18 is higher than the conductive bar 17. The rotating column 16 is turned to make the axis of the contact column 18 roughly coincide with the axis of the terminal hole of the electrical device 5.

[0076] Install the electrical device 5 so that its terminal hole is inserted into the corresponding contact column 18 and the contact column 18 is pressed down until the retaining ring abuts against the conductive bar 17. Tighten the terminal fastening screw to bolt the electrical device 5 to the rotating fixing column 21 on the housing.

[0077] After checking and confirming that the electrical device 5 is installed in place, turn the adjusting bolt 19 to further compress the spring so that the top of the contact column 18 is pressed and contacted with the bottom of the terminal hole. Repeatedly plug and unplug the electrical device 5 times to check whether the action is reliable and smooth.

[0078] The terminal 15 adopts a rotating column 16 and a sliding groove structure, and the axial position can be adjusted within a certain range to adapt to the terminal distribution of different types of electrical equipment 5, and has strong versatility.

[0079] The terminal 15 is rotatably connected to the bracket plate 13 via the rotating shaft 2. When the electrical device 5 is installed, the terminal 15 can swing around the rotating shaft 2 and automatically align with the terminal hole, thereby achieving high assembly efficiency.

[0080] The rotating fixing column 21 mechanically connects the conductive strip 17 to the electrical device 5, and assumes the function of mechanical positioning and guiding, so that the conductive strip 17 is free from current torque and the contact is reliable. At the same time, it acts as an insulation isolation to prevent the conductive strip 17 from short-circuiting with the housing.

[0081] The contact column 18 and the terminal hole are pressed by a spring, which can effectively absorb the processing and assembly errors of the terminal hole and reduce the requirements. The adjusting bolt 19 can accurately adjust the contact pressure to ensure reliable electrical contact.

[0082] A retaining ring and a pull block are arranged between the contact column 18 and the conductive strip 17, which can automatically reset when loading and unloading the electrical device 5, ensuring easy access. The first conductive strip 20 is made of soft material and can be bent and deformed to reduce the insertion and extraction force.

[0083] The conductive strip 17 and the contact column 18 are made of high-purity copper material, and the first conductive belt 20 and the second conductive belt are woven with fine wires, which have good conductive properties, small contact resistance and high reliability.

[0084] The upper conductor group 7 and the lower conductor group 8 composed of a plurality of thin copper wires are welded to the second conductive tape 22, and the cross-sectional area can be increased by parallel connection to meet the requirements of large current transmission, while facilitating on-site line selection and maintenance.

[0085] The partition 14 separates the terminals 15, the live parts are fully enclosed, the overall insulation level is high, and interphase short circuit and discharge to the ground are avoided, which is safe and reliable.

[0086] In summary, this embodiment has effectively solved the problems of large differences in terminal distribution of electrical equipment, difficult on-site wiring, inconvenient plugging and unplugging, and unreliable electrical contact. It has excellent safety, versatility, reliability, and convenience, and can significantly improve the performance of the distribution cabinet.

[0087] Example 3

[0088] Figures 1 to 15 It is shown that, based on Examples 1 and 2, this embodiment provides an optimal design and installation method for a modular high-efficiency power distribution cabinet, which further improves safety, reliability and heat dissipation.

[0089] A method for installing a modular high-efficiency power distribution cabinet comprises the following steps:

[0090] S1. According to the needs, multiple modules are fixedly connected, select the required number of wires on the upper wire group 7 and the lower wire group 8, and snap into the first fixing frame 1;

[0091] S2. According to the wiring requirements, select the corresponding number of upper and lower wiring racks 3 and 4, and electrically connect the plurality of terminals 15 to the upper and lower wire groups 7 and 8 on the wires through a plurality of second conductive tapes 22;

[0092] S3. Fill the cooling box 9 and the heat conducting plate 10 on the multiple modules with silicone oil, manually adjust the multiple terminals 15, and push the symmetrically arranged terminals 15 close to the electrical equipment 5 in both the upward and downward directions to the upper limit;

[0093] S4. The fixing bolts of the electrical equipment to be installed 5 are fixedly connected to the plurality of rotating fixing columns 21, and the fastening bolts on the upper and lower wiring ports of the electrical equipment 5 are loosened to the maximum state;

[0094] S5. Push the electrical device 5 to move closer to the cooling box 9, so that the rotating fixed column 21 pushes the conductive strip 17, driving the rotating column 16, the conductive strip 17, the contact column 18, the adjusting bolt 19, the first conductive belt 20 and the rotating fixed column 21 to rotate around the connection point between the rotating column 16 and the rotating shaft 2, so that the contact column 18 automatically snaps into the wiring port of the electrical device 5;

[0095] S6. Tighten the fastening bolts on the wiring port of the electrical device 5 to complete the installation of the electrical device 5. The isolation housing 11 is clamped to the outer end of the first fixing frame 1, and the sealing plate 12 is clamped between the isolation housings 11.

[0096] The power distribution cabinet is mainly composed of several functional modules, including busbar room module, circuit breaker module, capacitor module, reactor module, metering module and control module, etc. Each module adopts a unified appearance size and interface standard and can be freely combined. The following takes the circuit breaker as an example.

[0097] The circuit breaker module is equipped with electrical equipment 5 such as a circuit breaker, which is electrically connected to the upper and lower wire groups 7 and 8 in the busbar room module through the upper and lower wiring racks 3 and 4. The working current of the circuit breaker is generally large and the heat generated is high, so a liquid cooling system consisting of a cooling box 9 and a heat conducting plate 10 is set in the circuit breaker module.

[0098] The cooling box 9 is made of an aluminum rectangular box, and the inner cavity is filled with environmentally friendly silicone heat transfer oil. The heat transfer plate 10 is made of a copper plate, and the inner cavity is also filled with heat transfer oil. The cooling box 9 and the heat transfer plate 10 are connected in series to form a loop through a metal hose with a valve and a quick-release connector, and the heat transfer oil can circulate in it.

[0099] The outer surface of the cooling box 9 is provided with fins and equipped with an axial flow fan, so that the cooling box 9 becomes a small air cooler. The side wall of the cooling box 9 is provided with a safety valve and an oil filling port, and vacuum oil filling and debugging are required before leaving the factory.

[0100] The heat conducting plate 10 is arranged close to the housing of the electrical device 5 and fixed by bolts or buckles. Thermal conductive silicone grease is applied between the heat conducting plate 10 and the electrical device 5 to reduce contact thermal resistance. Flame retardant heat insulating cotton is laid between the heat conducting plate 10 and the isolation shell 11 to reduce the surface temperature of the shell.

[0101] The isolation shell 11 is molded with high-strength SMC glass fiber reinforced plastic material, and the inner and outer surfaces are sprayed with insulating paint. The side and bottom of the isolation shell 11 are provided with a plurality of heat dissipation holes, and the back is hinged with a movable panel for easy maintenance.

[0102] The sealing plate 12 is made of silicone rubber and filled with flame retardant and fireproof agent. The sealing plate 12 is connected to the isolation shell 11 by a buckle, and the buckle is made of nylon injection molding. A boss is set on the edge of the sealing plate 12 and embedded in the groove of the isolation shell 11 to ensure good sealing.

[0103] Step S1. According to the engineering design requirements, select the required functional modules and assemble the modules into a complete power distribution cabinet using M12 bolts. Use tinned copper bars to connect the upper and lower wire groups 7 and 8 of adjacent modules in sequence.

[0104] Step S2. The upper and lower wiring racks 3 and 4 in the circuit breaker module, each terminal 15 is welded to the corresponding incoming line row or outgoing line row through the second conductive tape 22. The conductive tape should have a margin in length to avoid being pulled apart during installation of the circuit breaker.

[0105] Step S3. Disconnect the quick-release connector between the cooling box 9 and the heat conducting plate 10, slowly inject heat conducting oil from the oil filling port, and open the exhaust valve to exhaust air until the oil level is higher than the safety valve. Reconnect the quick-release connector.

[0106] Step S4. Loosen the main circuit terminal fixing screws at both ends of the circuit breaker, and align the mounting holes on the back of the circuit breaker with the holes of the rotating fixing columns 21 on the wiring rack.

[0107] Step S5. Push the circuit breaker by hand to insert it between the upper and lower wiring frames 3 and 4. The terminal 15 moves and rotates with the circuit breaker, and the contact column 18 is automatically inserted into the terminal hole of the circuit breaker.

[0108] Step S6. Tighten the fixing screws of the main terminal of the circuit breaker with a wrench, align the mounting holes on both sides of the circuit breaker housing with the exposed threaded holes of the rotating fixing column 21, install the M6 ​​screws and tighten them to complete the mechanical fixation. Cover the isolation housing 11 and buckle the sealing plate 12.

[0109] Step S7: Turn on the cooling system, start the axial flow fan, and check whether the circulation is normal. Use an infrared thermometer to check whether the temperature rise of each part is qualified.

[0110] Step S8. After the circuit breaker has been running for a long time, the quality of the heat transfer oil needs to be checked regularly, and filtered or replaced if necessary. The quick-release connectors and valves should also be checked for leakage. If the cooling box 9 is found to be leaking, the machine should be shut down for inspection immediately.

[0111] The modular design facilitates cabinet type changes and functional expansion. Each module can be assembled and tested independently, greatly improving production efficiency and product quality and reducing manufacturing costs.

[0112] The circuit breaker and the wiring rack are connected by bolt-free crimping, which makes installation faster and can be completed within 10 minutes. The upper and lower symmetrical layout can be inserted in both directions, which is not easy to make mistakes.

[0113] The rotating terminal 15 adopts a double spring design, which can automatically adjust the center when the assembly error is large, and the crimping is more reliable. The spring preload is large, the current stability is good, and it is not easy to produce hot spots.

[0114] Fully enclosed insulation isolation, protection level up to IP67, can operate safely even in harsh environments. Insulation cotton and flame retardant further enhance the fire resistance.

[0115] The silicone rubber sealing plate 12 will not melt and flow at high temperatures, and can block arc high-temperature smoke and delay the spread of fire. The nylon buckle has high mechanical strength, does not age, and can be opened and closed multiple times.

[0116] The cooling box 9 has a built-in safety valve, which can automatically release pressure when the heat transfer oil expands due to heat to prevent pipe explosion. The oil filling port and exhaust valve are convenient for system installation and commissioning.

[0117] The copper heat conducting plate 10 has excellent heat conducting performance and can effectively absorb the heat of the electrical equipment 5 and transfer it to the heat conducting oil. The cooling box 9 and the heat conducting plate 10 are combined to have high heat dissipation strength and small volume.

[0118] The rectangular cross-section cooling circuit has low resistance, fast flow rate of heat transfer oil and good heat exchange effect. The number of cooling boxes 9 can be selected according to the load size to achieve modular heat dissipation.

[0119] A Y-type filter is installed at the inlet of the cooling box 9, and an electromagnetic flowmeter is installed at the outlet to monitor the cleanliness and flow of the heat transfer oil in real time to ensure long-term and efficient operation of the system.

[0120] This embodiment improves the safety, reliability and heat dissipation of the distribution cabinet to the greatest extent, and is particularly suitable for harsh working conditions such as high temperature, dust, and vibration, and can be widely used in metallurgy, chemical industry, electric power and other industries.

[0121] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A modular high-efficiency power distribution cabinet, characterized in that: The cabinet comprises a cabinet body, the cabinet body is composed of a plurality of modules distributed in an array, the plurality of modules each comprising a first fixing frame (1), an upper wiring frame (3) and a lower wiring frame (4) symmetrically arranged up and down are fixedly connected at positions near the top and bottom ends of the first fixing frame (1) through a rotating shaft (2), an electrical device (5) is fixedly connected between the symmetrically arranged upper wiring frame (3) and the lower wiring frame (4), a second fixing frame (6) is fixedly connected inside the first fixing frame (1), an upper wire group (7) and a lower wire group (8) symmetrically arranged up and down are fixedly connected at one end of the first fixing frame (1) and the second fixing frame (6) away from the electrical device (5), the upper wiring frame (3) and the lower wiring frame (4) are electrically connected to the upper wire group (7) and the lower wire group (8) respectively. A cooling box (9) is fixedly connected between the upper wire group (7) and the lower wire group (8), a heat conduction block is fixedly connected between the cooling box (9) and the electrical equipment (5), a heat conduction plate (10) is clamped on one end of the cooling box (9) away from the electrical equipment (5), an isolation shell (11) symmetrically arranged on the left and right is clamped on the outer end of the first fixing frame (1), a sealing plate (12) is clamped on one end of the symmetrically arranged isolation shell (11) away from the heat conduction plate (10), the cooling box (9) and the heat conduction plate (10) are both hollow structures, and the hollow parts are filled with silicone oil, the cooling box (9) and the heat conduction plate (10) and two adjacent heat conduction plates (10) are connected via quick connectors, and the cooling box (9) melts when the temperature exceeds a threshold value; The first fixing frame (1) comprises a plurality of bracket plates (13), the second fixing frame (6) comprises a plurality of partition plates (14), a partition plate (14) is fixedly connected between two adjacent bracket plates (13), and the number of partition plates (14) is one less than the number of bracket plates (13), the upper wire group (7) and the lower wire group (8) are both electrically connected to external equipment, the heat conducting plate (10) located at the outermost end is connected to the outside through a quick connector, the upper wiring rack (3) and the lower wiring rack (4) both comprise a plurality of wiring posts (15) fixedly connected to wiring ports of the electrical equipment (5), the upper wiring rack (3) and the lower wiring rack ( The terminal posts (15) on the upper wiring rack (3) are arranged in a one-to-one correspondence with the interfaces of the electrical equipment (5); the number of the partitions (14) is equal to the number of the terminal posts (15) on the upper wiring rack (3); the plurality of terminal posts (15) are rotatably connected to the bracket plate (13) via the rotating shaft (2); the plurality of terminal posts (15) include a rotating column (16) rotatably connected to the outer end of the rotating shaft (2); a sliding groove matching the outer end of the rotating shaft (2) is provided in the rotating column (16); and the rotating shaft (2) can slide in the sliding groove, so that the position of the rotating column (16) can be adjusted through the sliding groove, so that the terminal posts (15) can adapt to different electrical equipment (5).

2. A modular high-efficiency power distribution cabinet according to claim 1, characterized in that: The outer end of the rotating column (16) is fixedly connected to a conductive strip (17), the end of the conductive strip (17) close to the electrical device (5) is slidably connected to a contact column (18), the bottom end of the contact column (18) is fixedly connected to a retaining ring, and the bottom end of the retaining ring is fixedly connected to a pull block.

3. A modular high-efficiency power distribution cabinet according to claim 2, characterized in that: The contact column (18) penetrates the conductive bar (17) upwards, and the outer end of the penetrated portion is threadedly connected to an adjusting bolt (19), and a spring is fixedly connected between the conductive bar (17) and the adjusting bolt (19), and the spring is a conical structure.

4. A modular high-efficiency power distribution cabinet according to claim 3, characterized in that: The top end of the contact column (18) is fixedly connected to the interface of the electrical device (5); the outer end of the contact column (18) located between the electrical device (5) and the adjusting bolt (19) is fixedly connected to a first conductive belt (20); the end of the first conductive belt (20) away from the contact column (18) is fixedly connected to the conductive strip (17); the conductive strip (17) and the contact column (18) are both made of pure copper; and the first conductive belt (20) is made of pure copper braiding.

5. A modular high-efficiency power distribution cabinet according to claim 2, characterized in that: A rotating fixing column (21) is fixedly connected between the conductive bar (17) and the electrical device (5); one end of the rotating fixing column (21) close to the electrical device (5) is threadedly connected to the electrical device (5) via a fixing bolt; the rotating fixing column (21) is made of insulating material.

6. A modular high-efficiency power distribution cabinet according to claim 5, characterized in that: The upper wire group (7) and the lower wire group (8) are both composed of a plurality of wires, and the end of each conductive strip (17) away from the contact column (18) is electrically connected to the corresponding wire on the upper wire group (7) and the lower wire group (8) through a second conductive strip (22), the second conductive strip (22) being made of pure copper braiding, and the end of the rotating fixed column (21) close to the conductive strip (17) is located between the first conductive strip (20) and the second conductive strip (22).

7. A modular high-efficiency power distribution cabinet according to claim 1, characterized in that: The first fixing frame (1), the second fixing frame (6) and the isolation shell (11) are all provided with openings at one end close to the heat conducting plate (10), the openings being used to allow the upper wire group (7), the lower wire group (8) and the cooling box (9) to slide, the top end of the sealing plate (12) is fixedly connected to a handle, and a through hole is provided in the handle, and the isolation shell (11) is made of a high temperature resistant insulating material.

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