Stable low-voltage drawer cabinet

Abstract

The invention provides a stable low-voltage drawer cabinet which comprises a drawer cabinet body frame, a drawer panel is arranged on the drawer cabinet body frame, drawer guide rails are arranged on the two sides of the interior of the drawer panel, an incoming line terminal strip is in wire connection with a circuit breaker, the circuit breaker is in circuit connection with a control relay, and the control relay is in circuit connection with a voltage stabilizer. The voltage stabilizer is in circuit connection with the wire outlet terminal strip through a wire, the wire outlet terminal strip is provided with a wire duct plate, the drawer bottom plate is provided with a drawer component unit, and the drawer component unit is connected with the main circuit and the control circuit. The control relay is connected with the programmable logic controller, automatic control and monitoring of the drawer cabinet are achieved, the intelligent level of the system is improved, circuit logic judgment is carried out through a thermal stability check formula, a dynamic stability check formula and a short-circuit current expression formula of the voltage stabilizer, and the reliability of the system is improved. The protection capability of the drawer cabinet under the short circuit condition is improved, and equipment damage and potential safety hazards caused by the short circuit are reduced.

Description

Technical Field

[0001] The invention relates to the field of low-voltage drawer cabinets, and in particular to a stable low-voltage drawer cabinet. Background Art

[0002] The low-voltage drawer cabinet is an electrical device widely used in low-voltage power distribution systems, mainly used to distribute and control electric energy. With the continuous development of the power system and the increasing requirements for the reliability of power supply, the importance of low-voltage drawer cabinets has become increasingly prominent; the low-voltage drawer cabinet proposed in the Chinese invention patent application number: CN202411144968.1 relates to the technical field of drawer cabinets, which includes a cabinet body, a plurality of installation cavities are provided on the cabinet body in the vertical direction, a drawer body located in the installation cavity, and a circuit breaker is fixed in the drawer body; the drawer body is provided with a locking pin, a transmission shaft located in the drawer body, and a handle fixed to one end of the transmission shaft and rotatably arranged on the outer side of the drawer body, and the transmission shaft can rotate around its own axis when the handle is rotated; a linkage member for controlling the locking pin is provided on the outer periphery of the transmission shaft, a locking through hole is provided on the bottom side of the drawer body, and a locking slot is provided on the bottom side of the installation cavity; an adjusting member for controlling the opening and closing of the circuit breaker is provided on the inner end of the transmission shaft.

[0003] However, the existing low-voltage drawer cabinets have some shortcomings in the process of use and still need to be improved. In traditional low-voltage drawer cabinets, the automatic control and monitoring functions are relatively weak, and there is a lack of timely monitoring of stable current and short-circuit current. In terms of short-circuit protection, thermal stability and dynamic stability are not fully considered, which makes the drawer cabinet insufficient in the case of short-circuit protection. The cabinet structure is relatively simple and lacks sufficient support and reinforcement measures. The locking device of the drawer is not safe and reliable enough, and there is a risk of misoperation. The conductivity of the materials used in the electrical connection part is general, which affects the efficiency of power transmission. The insulation protection of the busbar is not perfect, and there are certain safety hazards. The heat dissipation and ventilation design is not reasonable, resulting in poor heat dissipation of components and affecting the service life of the equipment. The wiring is relatively chaotic and inconvenient for maintenance and management. . Therefore, we propose a stable low-voltage drawer cabinet. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised by the existing background technology. In order to achieve the above invention purpose, the present invention provides the following technical solutions: a stable low-voltage drawer cabinet, comprising a drawer cabinet frame, a drawer panel is arranged on the drawer cabinet frame, drawer guide rails are arranged on both sides of the drawer panel, a drawer bottom plate is arranged on the rear side of the drawer panel, an incoming terminal row is arranged on the upper end of the drawer cabinet frame, the incoming terminal row is connected to the circuit breaker wire, the circuit breaker is connected to the control relay circuit, the control relay is connected to the voltage regulator circuit, the voltage regulator is connected to the outgoing terminal row circuit through the wire, a wire slot plate is arranged on the outgoing terminal row, a drawer component unit is arranged on the drawer bottom plate, the drawer component unit is connected to the main circuit and the control circuit, an arc cover is arranged on the rear side of the drawer component unit, and a ventilation hole is arranged on the arc cover; a cover plate is arranged on the top of the drawer cabinet frame, a long strip hole is arranged on the bottom of the drawer cabinet frame, and a convex bridge is arranged on the long strip hole.

[0005] As a preferred technical solution of the present invention, a door lock core is provided on the drawer panel, and a door lock buckle is provided on the door lock core; a supporting beam is provided between the drawer cabinet frames, and fixed angle code rings are provided at the top four corners of the drawer cabinet frames.

[0006] As a preferred technical solution of the present invention, a wire trough side plate is provided on the rear side of the drawer bottom plate, the wire trough side plate is provided with a wire trough hole, and a cable fixing buckle is provided on the wire trough hole.

[0007] As a preferred technical solution of the present invention, a main bus and a branch bus are arranged in the drawer panel, the main bus is used to transmit electric energy, and the branch bus is connected to the main bus and extends to the drawer unit.

[0008] As a preferred technical solution of the present invention, the control relay is connected to a programmable logic controller.

[0009] As a preferred technical solution of the present invention, the main busbar and the branch busbar are made of copper bars or aluminum bars, and the outer surfaces of the main busbar and the branch busbar are provided with insulating sleeves.

[0010] As a preferred technical solution of the present invention, a contact rod is provided on the branch busbar, a groove is provided on the contact rod, an arc-shaped contact is provided at the front end of the contact rod, the surface of the arc-shaped contact is silver-plated, an upper contact hook is provided at the upper part of the arc-shaped contact, and a lower contact hook is provided at the lower part of the arc-shaped contact, and the length of the upper contact hook and the lower contact hook are both 1.4 cm and the width is 0.45 cm.

[0011] As a preferred technical solution of the present invention, an upper hook groove is provided on the inner side of the upper contact hook, and a lower groove is provided on the inner side of the lower contact hook. The depth of the upper hook groove and the lower groove provided on the inner sides of the upper contact hook and the lower contact hook is 0.2 cm, and the width is 0.3 cm.

[0012] As a preferred technical solution of the present invention, a wire is wound in the upper hook groove and the lower groove, and the arc range of the arc contact is between 120° and 150°.

[0013] As a preferred technical solution of the present invention, the stable current calculation formula of the voltage stabilizer is: Where: P is the load power, unit: watt W, V is the stable voltage, unit: volt V, is the power factor.

[0014] As a preferred technical solution of the present invention, the thermal stability verification formula of the voltage stabilizer is: in: is the short-circuit steady-state current, unit: ampere A, t is the short-circuit duration unit: second s, is the thermal stability coefficient, S is the conductor cross-sectional area, unit: square millimeter mm².

[0015] As a preferred technical solution of the present invention, the dynamic stability verification formula of the voltage stabilizer is: in, is the electric force, unit: Newton N, is the conductor length, unit: meter m, It is the short-circuit impulse current, unit: ampere A.

[0016] As a preferred technical solution of the present invention, the short-circuit current of the voltage stabilizer is expressed as: in: is the short-circuit current, V is the power supply voltage, and Z is the short-circuit impedance unit: ohm Ω, is the voltage factor.

[0017] A method for using a stable low-voltage drawer cabinet comprises the following steps: Step 1. Installation and inspection: Place the stable low-voltage drawer cabinet in an appropriate location and ensure that it is stable; check whether all connecting wires are firm, including the incoming terminal block, circuit breaker wires, control relay circuit, voltage regulator circuit, and outgoing terminal block circuit; at the same time, confirm that the insulation sleeves of the main busbar and branch busbar are intact; Step 2. Connect the wires: Connect the power cord to the incoming terminal block to ensure that the connection is correct and firm; and use cable fixing buckles to fix the cables, and ensure that the branch busbar, contact rod, arc contact, upper contact hook and lower contact hook and other components are clean and free of oil and impurities; install the contact rod on the branch busbar to ensure that it is firmly installed; set a groove on the contact rod, and the size and shape of the groove should match the diameter of the wire to ensure that the wire can be tightly wound on the contact rod; install the arc contact at the front end of the contact rod to ensure that the connection between the arc contact and the contact rod is firm; set an upper hook groove and a lower groove on the inner side of the upper contact hook and the lower contact hook, and the size and shape of the upper hook groove and the lower groove should match the diameter of the wire to ensure that the wire can be tightly wound on the upper contact hook and the lower contact hook; wind the wire in the upper hook groove and the lower groove, and ensure that the wire is tightly wound, and the winding directions between the adjacent two layers are opposite to increase the winding density and contact area of ​​the wire; Step 3. Insert the drawer component unit: Open the door lock cylinder on the drawer panel, unlock the door lock buckle, and then gently pull open the drawer panel; install the drawer component unit on the drawer bottom plate, and correctly connect the drawer component unit with the main circuit and control circuit; close the drawer panel and lock the door lock buckle; Step 4. Configure control relays and programmable logic controllers: Configure control relays and programmable logic controllers according to requirements; programmable logic controllers and program writing to adjust hardware connections; Step 5. Testing and debugging: After completing the above steps, test to verify whether the stable low-voltage drawer cabinet functions normally; check the working status of each component, including circuit breakers, voltage stabilizers, and control relays; and debug to ensure the stability and reliability of the system; Step 6. Use and maintenance: When using a stable low-voltage drawer cabinet, perform regular maintenance and inspections, including cleaning the equipment, checking whether the connecting wires are loose or damaged, and replacing aging parts.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: in the scheme of the present invention: the control relay is connected to the programmed logic controller, which realizes the automatic control and monitoring of the drawer cabinet, improves the intelligence level of the system, and performs circuit logic judgment through the thermal stability verification formula, dynamic stability verification formula and short-circuit current representation formula of the voltage stabilizer, thereby improving the protection capability of the drawer cabinet in the event of a short circuit and reducing equipment damage and safety hazards caused by the short circuit.

[0019] The drawer cabinet frame is equipped with support beams and fixed angle code rings to enhance the overall structural strength of the cabinet, improve stability, withstand certain external forces and loads, and reduce the risk of cabinet deformation. The drawer panel is equipped with a door lock core and door lock buckle to increase the safety of the drawer and prevent misoperation and unauthorized access. The outer surface of the main busbar and branch busbar is equipped with an insulating sleeve to effectively prevent electric shock accidents and improve electrical safety.

[0020] The main busbar and branch busbar made of copper or aluminum bars have good conductivity, which can ensure efficient transmission of electric energy and reduce energy loss. The reasonable connection of the incoming terminal block, circuit breaker, control relay and voltage stabilizer ensures the stable supply of electric energy and improves the operating reliability of the equipment.

[0021] The upper hook groove and the lower groove provided on the inner side of the upper hook and the lower hook can make the wire tightly wound on the hook, increasing the contact area and the connection firmness. The wire is wound in multiple layers in the upper hook groove and the lower groove, each layer is tightly wound, and the winding directions of the adjacent layers are opposite, so as to increase the winding density and contact area of ​​the wire.

[0022] When winding the wire, use a special fastening tool to ensure the tightness and firmness of the wire winding to avoid loosening during use. It can effectively increase the contact area of ​​the wire after winding, improve the connection firmness and current transmission stability, thereby ensuring the normal operation and reliability of the stable low-voltage drawer cabinet.

[0023] The arc-shaped cover on the rear side of the drawer component unit is equipped with ventilation holes, which helps to improve the heat dissipation effect of the components and extend their service life. The long holes and convex bridge design on the cover plate increase the ventilation performance of the cabinet and help maintain a good working environment in the cabinet. A wire trough plate is set on the outlet terminal block, and a wire trough side plate and wire trough holes are set on the rear side of the drawer bottom plate, and equipped with cable fixing buckles, so that the wiring of wires and cables is more neat and standardized, and easy to maintain and manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure provided by the present invention; Figure 2 A schematic diagram of the internal structure provided by the present invention; Figure 3 A schematic diagram of the structure of a programming logic controller provided by the present invention; Figure 4 A schematic diagram of a local structure provided by the present invention; Figure 5 A schematic diagram of the door lock structure provided by the present invention; Figure 6 A schematic diagram of the wire slot hole structure provided by the present invention; Figure 7 A schematic diagram of the cover plate structure provided by the present invention; Figure 8 A schematic diagram of the convex bridge structure provided by the present invention; Fig. 9 This is a schematic diagram of the contact hook structure provided by the present invention.

[0025] Indicated in the figure: 1. Drawer cabinet frame; 2. Drawer panel; 3. Drawer guide rail; 4. Drawer bottom plate; 5. Incoming terminal block; 6. Circuit breaker; 7. Control relay; 8. Voltage stabilizer; 9. Outgoing terminal block; 10. Wire trough plate; 11. Arc cover; 12. Ventilation hole; 13. Cover plate; 14. Long strip hole; 15. Convex bridge; 16. Door lock buckle; 17. Door lock core; 18. Support beam; 19. Fixed angle code ring; 20. Wire trough side plate; 21. Wire trough hole; 22. Cable fixing buckle; 23. Main bus; 24. Branch bus; 25. Programmable logic controller; 26. Contact rod; 27. Groove; 28. Arc contact; 29. ​​Upper contact hook; 30. Lower contact hook; 31. Upper hook groove; 32. Lower groove. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0027] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Example 1: Please refer to Figure 1-Figure 9 A stable low-voltage drawer cabinet, a stable low-voltage drawer cabinet, comprises a drawer cabinet frame 1, a drawer panel 2 is arranged on the drawer cabinet frame 1, drawer guide rails 3 are arranged on both sides of the drawer panel 2, a drawer bottom plate 4 is arranged on the rear side of the drawer panel 2, an incoming terminal block 5 is arranged on the upper end of the drawer cabinet frame 1, the incoming terminal block 5 is connected with the circuit breaker 6 by wires, the circuit breaker 6 is connected with the control relay 7 by circuits, the control relay 7 is connected with the voltage regulator 8 by circuits, the voltage regulator 8 is connected with the outgoing terminal block 9 by wires, a wire slot plate 10 is arranged on the outgoing terminal block 9, a drawer component unit is arranged on the drawer bottom plate 4, the drawer component unit is connected with the main circuit and the control circuit, an arc cover 11 is arranged on the rear side of the drawer component unit, and a ventilation hole 12 is arranged on the arc cover 11; a cover plate 13 is arranged on the top of the drawer cabinet frame 1, a long hole 14 is arranged at the bottom of the drawer cabinet frame 1, and a convex bridge 15 is arranged on the long hole 14.

[0029] A door lock core 17 is provided on the drawer panel 2 , and a door lock buckle 16 is provided on the door lock core 17 ; a supporting crossbeam 18 is provided between the drawer cabinet frames 1 , and fixed corner code rings 19 are provided at the top four corners of the drawer cabinet frames 1 .

[0030] A wire trough side plate 20 is disposed at the rear side of the drawer bottom plate 4 . The wire trough side plate 20 is provided with a wire trough hole 21 . A cable fixing buckle 22 is disposed on the wire trough hole 21 .

[0031] A main busbar 23 and a branch busbar 24 are provided in the drawer panel 2. The main busbar 23 is used to transmit electric energy. The branch busbar 24 is connected to the main busbar 23 and extends to the drawer unit.

[0032] The control relay 7 is connected to the programmed logic controller 25 .

[0033] The main busbar 23 and the branch busbar 24 are made of copper bars or aluminum bars, and the outer surfaces of the main busbar 23 and the branch busbar 24 are provided with insulating sleeves.

[0034] A contact rod 26 is provided on the branch busbar 24, a groove 27 is provided on the contact rod 26, an arc-shaped contact 28 is provided at the front end of the contact rod 26, the surface of the arc-shaped contact 28 is silver-plated, an upper contact hook 29 is provided at the upper part of the arc-shaped contact 28, and a lower contact hook 30 is provided at the lower part of the arc-shaped contact 28. The length of the upper contact hook 29 and the lower contact hook 30 are both 1.4 cm and 0.45 cm respectively.

[0035] An upper hook groove 31 is provided inside the upper contact hook 29 , and a lower groove 32 is provided inside the lower contact hook 30 . The upper hook groove 31 and the lower groove 32 provided inside the upper contact hook 29 and the lower contact hook 30 have a depth of 0.2 cm and a width of 0.3 cm.

[0036] The upper hook groove 31 and the lower groove 32 are wound with wires, and the arc range of the arc contact 28 is between 120° and 150°. The surface of the contact rod 26 is frosted to increase the friction when the wire is wound and improve the connection firmness. The material of the contact rod 26 is a copper alloy with good conductivity and certain elasticity to ensure the stability of current transmission and to a certain extent adapt to the vibration and temperature changes during the use of the drawer cabinet to reduce the risk of poor contact.

[0037] The diameter of the contact rod 26 is 0.7 cm, the length is 7 cm, and the depth of the groove 27 is 0.35 cm. Such a size design is helpful to better fix the wire and increase the contact area.

[0038] The surface of the arc contact 28 is silver-plated to improve conductivity and oxidation resistance, thereby ensuring long-term stable current transmission.

[0039] The radius of the arc-shaped contact 28 is 1.3 cm and the arc is 135°. This design can make the contact fit better with the wire, increase the contact area, and improve the current transmission efficiency.

[0040] The length of the upper contact hook 29 and the width of the lower contact hook 30 are both 1.4 cm and 0.45 cm, and such dimensions can provide sufficient winding space for the wire while ensuring the strength and stability of the contact hook.

[0041] The upper hook groove 31 and the lower groove 32 provided on the inner side of the upper contact hook 29 and the lower contact hook 30 have a depth of 0.2 cm and a width of 0.3 cm. Such dimensions can allow the wire to be tightly wound around the contact hook, thereby increasing the contact area and the connection firmness.

[0042] The wire is wound in multiple layers in the upper hook groove 31 and the lower groove 32 , each layer is tightly wound, and the winding directions of two adjacent layers are opposite, so as to increase the winding density and contact area of ​​the wire.

[0043] When winding the wire, use a special fastening tool to ensure the tightness and firmness of the wire winding to avoid loosening during use. It can effectively increase the contact area of ​​the wire after winding, improve the connection firmness and current transmission stability, thereby ensuring the normal operation and reliability of the stable low-voltage drawer cabinet.

[0044] The calculation formula of the stable current of the voltage stabilizer 8 is: Where: P is the load power, unit: watt W, V is the stable voltage, unit: volt V, is the power factor.

[0045] Thermal stability verification formula for voltage regulator 8: in: is the short-circuit steady-state current, unit: ampere A, t is the short-circuit duration unit: second s, is the thermal stability coefficient, S is the conductor cross-sectional area, unit: square millimeter mm².

[0046] Dynamic stability verification formula of voltage stabilizer 8: in, is the electric force, unit: Newton N, is the conductor length, unit: meter m, It is the short-circuit impulse current, unit: ampere A.

[0047] The short-circuit current of the voltage regulator 8 is expressed as: in: is the short-circuit current, V is the power supply voltage, and Z is the short-circuit impedance unit: ohm Ω, is the voltage factor.

[0048] Working principle of stable low voltage drawer cabinet: When the electric energy in the power system enters the drawer cabinet through the incoming terminal block 5, it first passes through the circuit breaker 6. The circuit breaker 6 plays a role in protecting the circuit. When an overload or short circuit abnormality occurs in the circuit, the circuit breaker 6 will automatically disconnect to prevent the electrical equipment from being damaged.

[0049] The electric energy after passing through the circuit breaker 6 is transmitted to the control relay 7. The control relay 7 controls and adjusts the circuit according to the preset logic and control signal. The control relay 7 is connected to the programmable logic controller 25 to achieve more accurate and flexible control functions.

[0050] The electric energy controlled by the control relay 7 then enters the voltage stabilizer 8. The function of the voltage stabilizer 8 is to stabilize the input electric energy, ensure that the output voltage is stable within a set range, and provide a stable power supply for subsequent electrical equipment.

[0051] The electric energy stabilized by the voltage stabilizer 8 is transmitted to the outlet terminal row 9 through the electric wire. The wire slot plate 10 provided on the outlet terminal row 9 is used to arrange and fix the electric wires, so that the wiring is more neat and standardized.

[0052] The drawer component unit arranged on the drawer bottom plate 4 is connected to the main circuit and the control circuit to realize various functional control and operation of the circuit. The ventilation holes 12 on the arc cover 11 arranged on the rear side of the drawer component unit are helpful for heat dissipation of the components to ensure their normal operation.

[0053] The main busbar 23 in the drawer panel 2 is used to transmit electric energy, and the branch busbar 24 is connected to the main busbar 23 and extends to the drawer unit to distribute the electric energy to each drawer unit. The main busbar 23 and the branch busbar 24 are made of copper or aluminum bars, which have good electrical conductivity. The insulating sleeve provided on the outer surface can prevent leakage and short circuit, thereby improving safety.

[0054] The door lock core 17 and the door lock catch 16 provided on the drawer panel 2 are used to ensure the safety and sealing of the drawer and prevent unauthorized persons from opening the drawer.

[0055] The supporting crossbeams 18 arranged between the drawer cabinet frames 1 enhance the structural stability of the cabinet, and the fixed corner code rings 19 arranged at the four corners of the top are used to fix the cabinet to improve the overall stability.

[0056] The wire slot holes 21 on the wire slot side plates 20 at the rear side of the drawer bottom plate 4 are used for arranging wires, and the cable fixing buckles 22 on the wire slot holes 21 can fix the cables to prevent them from loosening or falling off.

[0057] The long holes 14 provided on the cover plate 13 above the drawer cabinet frame 1 are used for ventilation and heat dissipation, and the convex bridges 15 on the long holes 14 play a role in strengthening the structure.

[0058] Embodiment 2: A stable low-voltage drawer cabinet, wherein materials are prepared by determining the positions and connection methods of the drawer panel 2, the bottom plate, the guide rail, the incoming terminal block 5, the outgoing terminal block 9, and the wire trough plate 10.

[0059] During the material preparation process, the required materials are purchased, such as cabinet frame materials, drawer panel 2 materials, guide rail materials, wires and cables, circuit breakers 6, control relays 7, voltage stabilizers 8, wire duct boards 10, copper or aluminum bars for main busbars 23 and branch busbars 24, and insulating sleeves. Ensure that the quality and specifications of the materials meet the design requirements.

[0060] Cabinet frame production: According to the design drawings, use appropriate tools and processes to produce the drawer cabinet frame 1. Install the support beam 18 to ensure the structural strength and stability of the cabinet frame. Install the fixed corner code rings 19 at the top four corners of the cabinet frame to fix and install the cover plate 13.

[0061] Installation of drawer components: Install the drawer rail 3 on the drawer cabinet frame 1 to ensure smooth sliding of the drawer. Install the drawer panel 2, and install the door lock core 17 and the door lock buckle 16 on the drawer panel 2 to achieve the lock function of the drawer. Install the main bus 23 and the branch bus 24 inside the drawer panel 2, which are made of copper or aluminum bars, and set an insulating sleeve on the outer surface to ensure safe and reliable power transmission. Install the drawer bottom plate 4 on the drawer cabinet frame 1, install the wire trough side plate 20 on the rear side, set the wire trough hole 21, and install the cable fixing buckle 22 to fix the cable.

[0062] Installation of electrical components: Install the incoming terminal block 5 on the upper end of the drawer cabinet frame 1 and connect it to the circuit breaker 6 through wires. Connect the circuit breaker 6 to the control relay 7. Connect the control relay 7 to the voltage stabilizer 8. According to the stable current calculation formula, thermal stability verification formula, dynamic stability verification formula and short-circuit current expression formula of the voltage stabilizer 8, select the appropriate model and parameters of the voltage stabilizer 8 to ensure that it can stabilize the output current and meet the requirements of thermal stability and dynamic stability. Connect the voltage stabilizer 8 to the outgoing terminal block 9 through wires, and install the wire trough plate 10 on the outgoing terminal block 9 to organize and protect the wires.

[0063] Drawer component unit installation: The drawer component unit is installed on the drawer bottom plate 4 and connected to the main circuit and the control circuit. An arc cover 11 is installed on the rear side of the drawer component unit, and a ventilation hole 12 is provided on the arc cover 11 to improve the heat dissipation effect.

[0064] Control system connection: Connect the control relay 7 to the programmable logic controller 25 to realize automatic control and monitoring of the drawer cabinet.

[0065] Cover plate 13 and detail processing: Install the cover plate 13 above the drawer cabinet frame 1, and set long holes 14 and convex bridges 15 on the cover plate 13 to meet the needs of ventilation and operation. Check whether all parts are installed firmly and connected well, and make necessary adjustments and tightening.

[0066] Testing and debugging: Conduct electrical performance tests on the low-voltage drawer cabinet, including the measurement of voltage, current, and power parameters to ensure that all indicators meet the design requirements. Conduct short-circuit tests to verify the short-circuit protection function of the voltage regulator 8 and the overall stability of the drawer cabinet. Conduct functional tests on the control system to check whether the control of the drawer cabinet by the programmed logic controller 25 is accurate and reliable. Debug and optimize according to the test results to ensure that the performance of the low-voltage drawer cabinet reaches the best state.

[0067] Quality inspection and acceptance: Conduct a comprehensive quality inspection on the completed stable low-voltage drawer cabinet to check whether the appearance, structure, and electrical performance meet the relevant standards and specifications. Organize relevant personnel to conduct acceptance to ensure that the low-voltage drawer cabinet meets the needs and expectations of users.

[0068] Embodiment 3: A method for using a stable low-voltage drawer cabinet, comprising the following steps: Step 1. Installation and inspection: Place the stable low-voltage drawer cabinet in an appropriate location and ensure that it is stable; check whether all connecting wires are firm, including the incoming terminal block 5, the circuit breaker 6 wires, the control relay 7 circuit, the voltage regulator 8 circuit and the outgoing terminal block 9 circuit; at the same time, confirm that the insulation sleeves of the main bus 23 and the branch bus 24 are intact; Step 2. Connect the wires: Connect the power cord to the incoming terminal block 5 to ensure that the connection is correct and firm; and use the cable fixing buckle 22 to fix the cable, and ensure that the branch bus 24, the contact rod 26, the arc contact 28, the upper contact hook 29 and the lower contact hook 30 are clean and free of oil and impurities; install the contact rod 26 on the branch bus 24 to ensure that the installation is firm; set a groove 27 on the contact rod 26, the size and shape of the groove should match the diameter of the wire to ensure that the wire can be tightly wound on the contact rod; install the arc contact 28 at the front end of the contact rod 26 to ensure that the connection between the arc contact and the contact rod is firm; set an upper hook groove 31 and a lower groove 32 on the inner side of the upper contact hook 29 and the lower contact hook 30, the size and shape of the upper hook groove and the lower groove should match the diameter of the wire to ensure that the wire can be tightly wound on the upper contact hook and the lower contact hook; wind the wire in the upper hook groove 31 and the lower groove 32 to ensure that the wire is tightly wound, and the winding directions between the adjacent two layers are opposite; Step 3. Insert the drawer component unit: open the door lock core 17 on the drawer panel 2, unlock the door lock buckle 16, and then gently pull open the drawer panel 2; install the drawer component unit on the drawer bottom plate 4, and correctly connect the drawer component unit with the main circuit and the control circuit; close the drawer panel 2 and lock the door lock buckle 16; Step 4. Configure the control relay 7 and the programmable logic controller 25: Configure the control relay 7 and the programmable logic controller 25 according to the requirements; the programmable logic controller 25 is connected to the programming program adjustment hardware; Step 5. Testing and debugging: After completing the above steps, test to verify whether the stable low-voltage drawer cabinet functions normally; check the working status of each component, including the circuit breaker 6, the voltage stabilizer 8, and the control relay 7; and debug to ensure the stability and reliability of the system; Step 6. Use and maintenance: When using a stable low-voltage drawer cabinet, perform regular maintenance and inspections, including cleaning the equipment, checking whether the connecting wires are loose or damaged, and replacing aging parts.

[0069] The calculation formula of the stable current of the voltage stabilizer 8 is: Where: P is the load power, unit: watt W, V is the stable voltage, unit: volt V, It is the power factor. The current size that the voltage stabilizer 8 needs to provide can be determined through the stable current calculation formula of the voltage stabilizer 8 to meet the load demand.

[0070] Thermal stability verification formula for voltage regulator 8: in: is the short-circuit steady-state current, unit: ampere A, t is the short-circuit duration unit: second s, is the thermal stability coefficient, S is the conductor cross-sectional area, unit: square millimeter mm². Through the thermal stability verification formula of the voltage stabilizer 8, it is determined whether the conductor can withstand the heat without being damaged during a short circuit, so as to ensure the safety of the voltage stabilizer 8 in the event of a fault.

[0071] Dynamic stability verification formula of voltage stabilizer 8: in, is the electric force, unit: Newton N, is the conductor length, unit: meter m, It is the short-circuit impact current, unit: ampere A. The dynamic stability verification formula of the voltage stabilizer 8 is used to determine whether the conductor can withstand the effect of electric force without damage or deformation during a short circuit, so as to ensure the stability of the low-voltage drawer cabinet.

[0072] The short-circuit current of the voltage regulator 8 is expressed as: in: is the short-circuit current, V is the power supply voltage, and Z is the short-circuit impedance unit: ohm Ω, It is the voltage factor. By calculating the short-circuit current of the voltage stabilizer 8, the current size of the low-voltage drawer cabinet when short-circuited can be obtained, providing a basis for short-circuit protection and fault analysis.

[0073] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A stable low-voltage drawer cabinet, comprising a drawer cabinet frame (1), wherein a drawer panel (2) is arranged on the drawer cabinet frame (1), characterized in that: Drawer guide rails (3) are arranged on both sides of the interior of the drawer panel (2), a drawer bottom plate (4) is arranged on the rear side of the drawer panel (2), an incoming line terminal block (5) is arranged on the upper end of the drawer cabinet frame (1), the incoming line terminal block (5) is connected to the circuit breaker (6) by wires, the circuit breaker (6) is connected to the control relay (7) by circuit, the control relay (7) is connected to the voltage regulator (8) by circuit, the voltage regulator (8) is connected to the outgoing line terminal block (9) by wires, and the outgoing line terminal block (9) is connected to the circuit of the voltage regulator (8). A wire slot plate (10) is arranged on the row (9); a drawer component unit is arranged on the drawer bottom plate (4); the drawer component unit is connected to the main circuit and the control circuit; an arc-shaped cover (11) is arranged on the rear side of the drawer component unit; a ventilation hole (12) is arranged on the arc-shaped cover (11); a cover plate (13) is arranged above the drawer cabinet frame (1); a long hole (14) is arranged at the bottom of the drawer cabinet frame (1); a convex bridge (15) is arranged on the long hole (14).

2. A stable low-voltage drawer cabinet according to claim 1, characterized in that: The drawer panel (2) is provided with a door lock core (17), and the door lock core (17) is provided with a door lock buckle (16); a supporting crossbeam (18) is provided between the drawer cabinet frames (1), and fixed corner code rings (19) are provided at the four top corners of the drawer cabinet frames (1).

3. A stable low-voltage drawer cabinet according to claim 1, characterized in that: A wire slot side plate (20) is provided at the rear side of the drawer bottom plate (4), the wire slot side plate (20) is provided with a wire slot hole (21), and a cable fixing buckle (22) is provided on the wire slot hole (21).

4. A stable low-voltage drawer cabinet according to claim 1, characterized in that: A main busbar (23) and a branch busbar (24) are arranged in the drawer panel (2); the main busbar (23) is used to transmit electric energy; the branch busbar (24) is connected to the main busbar (23) and extends to the drawer unit.

5. A stable low-voltage drawer cabinet according to claim 1, characterized in that: The control relay (7) is connected to a programmed logic controller (25).

6. A stable low-voltage drawer cabinet according to claim 4, characterized in that: The main busbar (23) and the branch busbar (24) are made of copper bars or aluminum bars, and the outer surfaces of the main busbar (23) and the branch busbar (24) are provided with insulating sleeves.

7. A stable low-voltage drawer cabinet according to claim 6, characterized in that: The branch busbar (24) is provided with a contact rod (26), the contact rod (26) is provided with a groove (27), the front end of the contact rod (26) is provided with an arc-shaped contact (28), the surface of the arc-shaped contact (28) is silver-plated, an upper contact hook (29) is provided at the upper part of the arc-shaped contact (28), and a lower contact hook (30) is provided at the lower part of the arc-shaped contact (28), and the length of the upper contact hook (29) and the lower contact hook (30) are both 1.4 cm and 0.45 cm respectively.

8. A stable low-voltage drawer cabinet according to claim 7, characterized in that: An upper hook groove (31) is provided on the inner side of the upper contact hook (29), and a lower groove (32) is provided on the inner side of the lower contact hook (30); the upper hook groove (31) and the lower groove (32) provided on the inner sides of the upper contact hook (29) and the lower contact hook (30) have a depth of 0.2 cm and a width of 0.3 cm.

9. A stable low-voltage drawer cabinet according to claim 8, characterized in that: A conductive wire is wound in the upper hook groove (31) and the lower groove (32), and the arc angle of the arc-shaped contact (28) is between 120° and 150°.

10. A method for using a stable low-voltage drawer cabinet, characterized in that: The following steps are involved: Step 1. Installation and inspection: Place the stable low-voltage drawer cabinet in an appropriate location and ensure that it is stable; check whether all connecting wires are secure, including the incoming terminal block (5), circuit breaker (6) wires, control relay (7) circuit, voltage regulator (8) circuit, and outgoing terminal block (9) circuit; at the same time, confirm that the insulation sleeves of the main busbar (23) and branch busbar (24) are intact; Step 2. Connect the wires: Connect the power wires to the incoming terminal block (5) and ensure that the connection is correct and secure. Use the cable fixing buckle (22) to fix the cables. Ensure that the branch busbar (24), the contact rod (26), the arc contact (28), the upper contact hook (29) and the lower contact hook (30) are clean and free of oil and impurities. Install the contact rod (26) on the branch busbar (24) and ensure that it is securely installed. Set a groove (27) on the contact rod (26). The size and shape of the groove should match the diameter of the wire to ensure that the wire The arc contact (28) is installed at the front end of the contact rod (26) to ensure that the arc contact and the contact rod are firmly connected; an upper hook groove (31) and a lower groove (32) are provided on the inner side of the upper contact hook (29) and the lower contact hook (30), and the size and shape of the upper hook groove and the lower groove should match the diameter of the wire to ensure that the wire can be tightly wound around the upper contact hook and the lower contact hook; the wire is wound in the upper hook groove (31) and the lower groove (32) to ensure that the wire is tightly wound, and the winding directions of the two adjacent layers are opposite; Step 3. Insert the drawer component unit: Open the door lock cylinder (17) on the drawer panel (2), unlock the door lock catch (16), and then gently pull open the drawer panel (2); install the drawer component unit on the drawer bottom plate (4), and correctly connect the drawer component unit with the main circuit and the control circuit; close the drawer panel (2), and lock the door lock catch (16); Step 4. Configuring the control relay (7) and the programmable logic controller (25): configuring the control relay (7) and the programmable logic controller (25) according to the requirements; the programmable logic controller (25) is connected to the programming program to adjust the hardware; Step 5. Testing and debugging: After completing the above steps, test to verify whether the stable low-voltage drawer cabinet functions normally; check the working status of each component, including the circuit breaker (6), the voltage stabilizer (8), and the control relay (7); and debug to ensure the stability and reliability of the system; Step 6. Use and maintenance: When using a stable low-voltage drawer cabinet, perform regular maintenance and inspections, including cleaning the equipment, checking whether the connecting wires are loose or damaged, and replacing aging parts.

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