Safety protection type digital low-voltage switch cabinet

Abstract

The utility model relates to the technical field of low-voltage switch cabinets, and discloses a safety protection type digital low-voltage switch cabinet, which comprises a cabinet body, the front part of the cabinet body is rotatably connected with a cabinet door, the top of the inner wall of the cabinet body is fixedly connected with an electric power control block, and the rear side of the electric power control block is fixedly connected with a plurality of wiring boards. Fixing strips are fixedly connected to the upper side and the lower side of the rear portion of the power control block, a plurality of limiting columns are fixedly connected to the adjacent sides of the two fixing strips, a plurality of extrusion springs are fixedly connected to the outer sides of the fixing strips, and clamping plates are fixedly connected to the other ends of the two extrusion springs. According to the utility model, the clamping plate is pushed during expansion, and the clamping plate moves under the limitation of the limiting column and compresses and extrudes the spring; during contraction, the spring is extruded to release energy, the clamping plate clings to the wiring board, and the anti-skid grooves enhance the clamping force, so that good contact at the wiring position can be kept under repeated thermal expansion and cold contraction.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, and in particular to a safety-protected digital low-voltage switchgear. Background Technology

[0002] In the modern power sector, safety-protected digital low-voltage switchgear, as a key power equipment, plays a vital role in distributing, controlling, and protecting electrical energy. It is widely used in various fields of industrial, commercial, and civil buildings. It is responsible for accurately and safely distributing the electrical energy received from the upper-level power grid to various electrical devices according to different needs. At the same time, with the help of digital technology, the switchgear can monitor power parameters such as current, voltage, and power in real time, realizing intelligent management of power operation status, which greatly improves the reliability and stability of power distribution.

[0003] However, existing safety-protected digital low-voltage switchgear still has some problems in practical use. Regarding the wiring points, current switchgear typically uses bolts to ensure connection stability. During normal operation, the mechanical pressure of tightening the bolts ensures tight contact between the wires and terminals, preventing loose electrical connections and ensuring stable current transmission. However, due to thermal expansion and contraction during operation, when current passes through the wiring points, the wires and terminals heat up due to the thermal effect of the current, causing them to expand. When the current decreases or power is cut off, the temperature drops, causing them to contract. This repeated process of thermal expansion and contraction gradually weakens the bolt tightening force, reducing the contact pressure at the wiring points and ultimately leading to poor contact. Poor contact not only increases contact resistance and causes additional energy loss but also triggers localized overheating, further damaging equipment and even causing serious safety accidents such as fires, posing a significant threat to the safe and stable operation of the power system. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a safety-protected digital low-voltage switchgear, which aims to improve the problem of poor contact at the wiring points caused by repeated thermal expansion and contraction in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a safety-protected digital low-voltage switchgear, comprising a cabinet body, a cabinet door rotatably connected to the front of the cabinet body, a power control block fixedly connected to the top of the inner wall of the cabinet body, multiple terminal blocks fixedly connected to the rear side of the power control block, fixing strips fixedly connected to the upper and lower sides of the rear of the power control block, multiple limiting posts fixedly connected to adjacent sides of two fixing strips, multiple compression springs fixedly connected to the outer side of the fixing strips, clamps fixedly connected to the other ends of two compression springs, multiple anti-slip grooves provided on the outer wall of the clamps, an insulating sleeve fixedly connected to the outer wall of the terminal block penetrating the cabinet body, a limiting block fixedly connected to the rear side of the inner wall of the cabinet body, a support plate fixedly connected to the middle of the inner wall of the cabinet body, a power switch fixedly connected to the top of the support plate, the rear side of the power switch engaging with the limiting block, and a fire extinguishing mechanism provided at the bottom of the inner wall of the cabinet body, the fire extinguishing mechanism being used to isolate external oxygen in the event of a fire.

[0006] As a further description of the above technical solution:

[0007] The fire extinguishing mechanism includes a limiting base plate, which is fixedly connected to the bottom of the inner wall of the cabinet. Multiple fixing bolts are fixedly connected to the top of the limiting base plate. Dividing blocks are provided on the outer walls of the multiple fixing bolts. A cover plate is provided on the top of the dividing blocks. The outer walls of the fixing bolts penetrate the cover plate. Multiple gas cylinders are provided on the inner walls of the limiting base plate and the inner walls of the cover plate. One end of the multiple gas cylinders is connected to a connecting pipe. A U-shaped pipe is connected to the top of the outer wall of the connecting pipe. Multiple nozzles are connected to the outer wall of the U-shaped pipe. An electric valve is fixedly connected to the front side of the outer wall of the U-shaped pipe.

[0008] As a further description of the above technical solution:

[0009] Multiple power meters are fixedly connected to the top front side of the power control block, and multiple control buttons are fixedly connected to the front of the power control block.

[0010] As a further description of the above technical solution:

[0011] An adjustment knob is fixedly connected to the center of the front side of the power control block, and a handle is fixedly connected to the front right side of the outer wall of the cabinet door.

[0012] As a further description of the above technical solution:

[0013] A warning light is fixedly connected to the top of the outer wall of the cabinet, and a smoke detector is fixedly connected to the left side of the inner wall of the cabinet.

[0014] As a further description of the above technical solution:

[0015] An observation window is provided on the middle right side of the outer wall of the cabinet door, and an outer frame is fixedly connected to the outer wall of the observation window.

[0016] As a further description of the above technical solution:

[0017] A nameplate is fixedly connected to the bottom front side of the cabinet, and a warning sign block is fixedly connected to the top right side of the outer wall of the cabinet door.

[0018] As a further description of the above technical solution:

[0019] A guide post is fixedly connected to the bottom of the outer wall of the cabinet, and a connecting block is fixedly connected to the outer wall of the guide post.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the power control block is digitally controlled to prevent the terminal block from expanding and contracting due to thermal expansion and contraction during long-term use. When expanding, it pushes the clamping plate, which moves under the restriction of the limit post and compresses the compression spring. When contracting, the compression spring releases energy, the clamping plate is in close contact with the terminal block, the anti-slip groove enhances the clamping force, the insulating sleeve isolates the power to prevent leakage, the support plate supports the power switch, and the limit block ensures the stability of the power switch. Thus, the wiring can maintain good contact under repeated thermal expansion and contraction.

[0022] 2. In this utility model, when a fire occurs, the detection equipment will trigger the electric valve to release inert gas from the gas cylinder, which will enter the cabinet through the connecting pipe and be evenly sprayed through the nozzle to reduce the oxygen concentration inside the cabinet. In addition, by rotating the fixing bolts, the cover plate and partition block can be quickly removed to facilitate the replacement of the gas cylinder, further improving the fire resistance of the low-voltage switchgear. Attached Figure Description

[0023] Figure 1 This is a perspective view of a safety-protected digital low-voltage switchgear proposed in this utility model;

[0024] Figure 2 This is a front view of a safety-protected digital low-voltage switchgear proposed in this utility model;

[0025] Figure 3 This is a rear view of a safety-protected digital low-voltage switchgear proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the power control block of a safety-protected digital low-voltage switchgear proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the fire extinguishing mechanism of a safety-protected digital low-voltage switchgear proposed in this utility model.

[0028] Legend:

[0029] 1. Cabinet body; 2. Fire extinguishing mechanism; 201. Limiting base plate; 202. Divider block; 203. Cover plate; 204. Gas cylinder; 205. Connecting pipe; 206. U-shaped pipe; 207. Nozzle; 208. Electric valve; 209. Fixing bolt; 3. Cabinet door; 4. Power control block; 5. Fixing strip; 6. Limiting post; 7. Compression spring; 8. Clamping plate; 9. Terminal block; 10. Insulating sleeve; 11. Anti-slip groove; 12. Limiting block; 13. Support plate; 14. Power switch; 15. Electricity meter; 16. Control button; 17. Adjustment knob; 18. Warning light; 19. Smoke detector; 20. Handle; 21. Observation window; 22. Outer frame; 23. Nameplate; 24. Warning sign block; 25. Wire post; 26. Connecting block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a safety-protected digital low-voltage switchgear, comprising a cabinet 1, a cabinet door 3 rotatably connected to the front of the cabinet 1, a power control block 4 fixedly connected to the top of the inner wall of the cabinet 1, the power control block 4 performing digital control, multiple terminal blocks 9 fixedly connected to the rear side of the power control block 4, and fixing strips 5 fixedly connected to the upper and lower rear sides of the power control block 4, with multiple limiting posts 6 fixedly connected to adjacent sides of two fixing strips 5. When expansion occurs, it will push the clamping plate 8, and the movement of the clamping plate 8 will be limited by the limiting posts 6, and will compress the compression spring 7. Multiple compression springs 7 are fixedly connected to the outer side of the fixing strips 5. The other end of the spring 7 is fixedly connected to the clamp plate 8. When the terminal block 9 retracts, the compression spring 7 will release elastic potential energy, so that the clamp plate 8 fits and clamps the terminal block 9. The outer wall of the clamp plate 8 is provided with multiple anti-slip grooves 11, which can improve the anti-slip ability between the clamp plate 8 and the terminal block 9. The outer wall of the terminal block 9 penetrates the cabinet 1 and is fixedly connected to the insulating sleeve 10. The rear side of the inner wall of the cabinet 1 is fixedly connected to the limit block 12. The middle of the inner wall of the cabinet 1 is fixedly connected to the support plate 13. The top of the support plate 13 is fixedly connected to the power switch 14. The rear side of the power switch 14 is engaged with the limit block 12. The bottom of the inner wall of the cabinet 1 is provided with a fire extinguishing mechanism 2. The fire extinguishing mechanism 2 is used to isolate the outside oxygen in the event of a fire.

[0032] Specifically, the low-voltage switchgear is digitally controlled by the power control block 4. During long-term use, the terminal block 9 will expand and contract due to thermal expansion and contraction. When it expands, it will push the clamping plate 8. At the same time, the movement of the clamping plate 8 will be limited by the limit post 6, and it will compress the compression spring 7. When the terminal block 9 contracts, the compression spring 7 will release its elastic potential energy, so that the clamping plate 8 will fit and hold the terminal block 9. The anti-slip groove 11 above can improve the anti-slip ability between the clamping plate 8 and the terminal block 9. Meanwhile, the insulating sleeve 10 can isolate the terminal block 9 to prevent current leakage above. At the same time, the support plate 13 can provide support for the power switch 14, and the limit block 12 can make the power switch 14 more stably fixed in the low-voltage switchgear. Thus, during repeated thermal expansion and contraction, the connection will not have poor contact.

[0033] Reference Figure 2 and Figure 5 The fire extinguishing mechanism 2 includes a limiting base plate 201, which is fixedly connected to the bottom of the inner wall of the cabinet 1. Multiple fixing bolts 209 are fixedly connected to the top of the limiting base plate 201. A partition block 202 is provided on the outer wall of the multiple fixing bolts 209. A cover plate 203 is provided on the top of the partition block 202. The outer wall of the fixing bolts 209 penetrates the cover plate 203. Multiple gas cylinders 204 are provided on the inner wall of the limiting base plate 201 and the inner wall of the cover plate 203. Rotating the fixing bolts 209 causes the cover plate 203 and the partition block 202 to be respectively... The gas cylinders 204 can be removed at any time for replacement and maintenance. One end of each gas cylinder 204 is connected to a connecting pipe 205. The top of the outer wall of the connecting pipe 205 is connected to a U-shaped pipe 206. The outer wall of the U-shaped pipe 206 is connected to multiple nozzles 207. An electric valve 208 is fixedly connected to the front side of the outer wall of the U-shaped pipe 206. When the electric valve 208 is opened, the inert gas in the gas cylinder 204 will enter the connecting pipe 205. The gas will enter the U-shaped pipe 206 through the electric valve 208 and be sprayed into the cabinet 1 through the nozzles 207.

[0034] Specifically, when a fire occurs in the low-voltage switchgear, it will be detected by the detection equipment in cabinet 1, triggering the opening of electric valve 208. At this time, the inert gas in cylinder 204 will enter the connecting pipe 205, and the gas will enter the U-shaped pipe 206 through electric valve 208 and be sprayed into cabinet 1 through nozzle 207, thereby isolating the oxygen content in cabinet 1. Furthermore, by rotating the fixing bolt 209, the cover plate 203 and the partition block 202 can be removed respectively, so that cylinder 204 can be removed at any time for replacement and maintenance, thereby improving the fire resistance of the low-voltage switchgear.

[0035] Reference Figure 1 , Figure 2 and Figure 3Multiple power meters 15 are fixedly connected to the top front of the power control block 4. The power meters 15 can monitor and display various key parameters during the operation of the power system in real time. Multiple control buttons 16 are fixedly connected to the front of the power control block 4. The control buttons 16 can realize the control operation of different functions of the power system. An adjustment knob 17 is fixedly connected to the middle front of the power control block 4. The adjustment knob 17 can precisely adjust some parameters of the power system. A handle 20 is fixedly connected to the front right side of the outer wall of the cabinet door 3. The handle 20 can easily realize the opening and closing of the cabinet door 3. A warning light 18 is fixedly connected to the top of the outer wall of the cabinet 1. The warning light 18 can remind the surrounding personnel to pay attention to the problem of the power system. A smoke detector 19 is fixedly connected to the left side of the inner wall of the cabinet 1. The smoke detector 19 can promptly detect and deal with potential fire hazards and provide key early warnings.

[0036] Specifically, the power meter 15 can monitor and display key parameters of the power system in real time, such as current, voltage, and power, providing operators with intuitive data references to keep abreast of the power system's operating status. The control buttons 16 enable control of different functions of the power system, the adjustment knob 17 allows for precise adjustment of some parameters in the power system, and the handle 20 facilitates the opening and closing of the cabinet door 3, providing convenience for daily maintenance and repair. The warning light 18 alerts surrounding personnel to potential problems in the power system so that appropriate measures can be taken in time. The smoke alarm 19 provides crucial early warnings for the timely detection and handling of potential fire hazards, effectively ensuring the safety of power equipment and personnel.

[0037] Reference Figure 1 , Figure 2 and Figure 3 An observation window 21 is provided on the middle right side of the outer wall of the cabinet door 3. The observation window 21 allows a clear view of the operating status of the equipment inside the cabinet. An outer frame 22 is fixedly connected to the outer wall of the observation window 21, which effectively protects the observation window 21 from damage caused by external collisions and scratches. A nameplate 23 is fixedly connected to the bottom front side of the cabinet body 1. The nameplate 23 allows operators and maintenance personnel to quickly understand the basic characteristics and technical parameters of the equipment. A warning sign block 24 is fixedly connected to the top right side of the outer wall of the cabinet door 3. The warning sign block 24 conveys clear safety warning information to people in the surrounding area. A conductor post 25 is fixedly connected to the bottom of the outer wall of the cabinet body 1. A connecting block 26 is fixedly connected to the outer wall of the conductor post 25. The conductor post 25 can conduct static electricity above the cabinet body 1, and the static electricity can be discharged to the ground through the connecting block 26.

[0038] Specifically, the observation window 21 allows for a clear view of the operating status of the equipment inside the cabinet, and the outer frame 22 effectively protects the observation window 21 from damage caused by external impacts and scratches. The nameplate 23 allows operators and maintenance personnel to quickly understand the basic characteristics and technical parameters of the equipment, ensuring that the equipment operates under the correct conditions. The warning sign block 24 conveys clear safety warning information to people in the surrounding area. The guide post 25 can conduct static electricity above the cabinet 1 out, and the connection block 26 can discharge static electricity to the ground.

[0039] Working principle: First, the low-voltage switchgear uses power control block 4 for digital control. During long-term operation, the terminal block 9 will expand and contract due to thermal expansion and contraction caused by temperature changes. When expansion occurs, the terminal block 9 will push the clamping plate 8, and the clamping plate 8 will move under the constraint of the limit post 6 and compress the compression spring 7. Conversely, when the terminal block 9 contracts, the compression spring 7 releases its stored elastic potential energy, causing the clamping plate 8 to tightly fit and clamp the terminal block 9. In addition, the anti-slip groove 11 on the top enhances the anti-slip performance between the clamping plate 8 and the terminal block 9. The insulating sleeve 10 is used to isolate the terminal block 9 to prevent power leakage. The support plate 13 provides necessary support for the power switch 14 and ensures that the power switch 14 is stably fixed in the low-voltage switchgear through the limit block 12, ensuring that there will be no poor contact problem at the wiring part during repeated thermal expansion and contraction.

[0040] Furthermore, through the fire extinguishing mechanism 2, in the event of a fire inside the low-voltage switchgear, the detection device inside the cabinet will immediately detect the abnormality and trigger the opening of the electric valve 208. At this time, the inert gas stored in the gas cylinder 204 will be released and enter the U-shaped pipe 206 through the connecting pipe 205, and finally be sprayed into the cabinet 1 through the nozzle 207 to reduce the oxygen concentration inside the cabinet. At the same time, by rotating the fixing bolt 209, the cover plate 203 and the partition block 202 can be easily removed to facilitate the replacement and maintenance of the gas cylinder 204 at any time. This series of measures significantly improves the fire resistance performance of the low-voltage switchgear.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety-protected digital low-voltage switchgear, comprising a cabinet (1), characterized in that: The cabinet (1) is rotatably connected to a cabinet door (3) at the front. A power control block (4) is fixedly connected to the top of the inner wall of the cabinet (1). Multiple terminal blocks (9) are fixedly connected to the rear side of the power control block (4). Fixing strips (5) are fixedly connected to the upper and lower rear sides of the power control block (4). Multiple limiting posts (6) are fixedly connected to the adjacent side of two fixing strips (5). Multiple compression springs (7) are fixedly connected to the outer side of the fixing strips (5). A clamping plate (8) is fixedly connected to the other end of each of the two compression springs (7). The outer wall of the clamping plate (8) is open. The cabinet is provided with multiple anti-slip grooves (11). The outer wall of the wiring board (9) penetrates the cabinet (1) and is fixedly connected with an insulating sleeve (10). A limit block (12) is fixedly connected to the rear side of the inner wall of the cabinet (1). A support plate (13) is fixedly connected to the middle of the inner wall of the cabinet (1). A power switch (14) is fixedly connected to the top of the support plate (13). The rear side of the power switch (14) is engaged with the limit block (12). A fire extinguishing mechanism (2) is provided at the bottom of the inner wall of the cabinet (1). The fire extinguishing mechanism (2) is used to isolate external oxygen in the event of a fire.

2. The safety-protected digital low-voltage switchgear according to claim 1, characterized in that: The fire extinguishing mechanism (2) includes a limiting base plate (201), which is fixedly connected to the bottom of the inner wall of the cabinet (1). Multiple fixing bolts (209) are fixedly connected to the top of the limiting base plate (201). A partition block (202) is provided on the outer wall of the multiple fixing bolts (209). A cover plate (203) is provided on the top of the partition block (202). The outer wall of the fixing bolts (209) penetrates the cover plate (203). Multiple gas cylinders (204) are provided on the inner wall of the limiting base plate (201) and the inner wall of the cover plate (203). One end of the multiple gas cylinders (204) is connected to a connecting pipe (205). A U-shaped pipe (206) is connected to the top of the outer wall of the connecting pipe (205). Multiple nozzles (207) are connected to the outer wall of the U-shaped pipe (206). An electric valve (208) is fixedly connected to the front side of the outer wall of the U-shaped pipe (206).

3. The safety-protected digital low-voltage switchgear according to claim 1, characterized in that: Multiple power meters (15) are fixedly connected to the top front of the power control block (4), and multiple control buttons (16) are fixedly connected to the front of the power control block (4).

4. The safety-protected digital low-voltage switchgear according to claim 1, characterized in that: An adjustment knob (17) is fixedly connected to the center of the front side of the power control block (4), and a handle (20) is fixedly connected to the front right side of the outer wall of the cabinet door (3).

5. A safety-protected digital low-voltage switchgear according to claim 1, characterized in that: A warning light (18) is fixedly connected to the top of the outer wall of the cabinet (1), and a smoke detector (19) is fixedly connected to the left side of the inner wall of the cabinet (1).

6. A safety-protected digital low-voltage switchgear according to claim 1, characterized in that: An observation window (21) is provided on the middle right side of the outer wall of the cabinet door (3), and an outer frame (22) is fixedly connected to the outer wall of the observation window (21).

7. A safety-protected digital low-voltage switchgear according to claim 1, characterized in that: A nameplate (23) is fixedly connected to the bottom front of the cabinet (1), and a warning sign block (24) is fixedly connected to the top right side of the outer wall of the cabinet door (3).

8. A safety-protected digital low-voltage switchgear according to claim 1, characterized in that: The bottom of the outer wall of the cabinet (1) is fixedly connected to a guide post (25), and the outer wall of the guide post (25) is fixedly connected to a connecting block (26).

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