Spontaneous combustion alarm device for high and low voltage power distribution cabinet

Abstract

A spontaneous combustion alarm device for a high-low voltage power distribution cabinet belongs to the technical field of spontaneous combustion alarm of electric cabinets, aims to solve the problem of inaccurate detection caused by dust accumulation on the surface of a smoke alarm in long-term use, and comprises a power distribution cabinet body and breathable filter plates fixedly mounted on two sides of the power distribution cabinet body. When spontaneous combustion occurs in the power distribution cabinet, a large amount of smoke is generated, when the exhaust fan drives gas in the power distribution cabinet body to flow, the generated smoke is discharged outwards along the exhaust fan, and the smoke is in contact with the smoke alarm and triggers the smoke alarm in the process of discharging the smoke outwards. The smoke alarm gives an alarm, transmits a signal to the audible and visual alarm and gives an alarm at the same time, when the exhaust fan drives air to flow, large airflow is discharged outwards from the breathable filter plate, and the airflow drives the cleaning structure to clean the detection surface of the smoke alarm in the outward flowing process, so that the detection surface is always in a clean state; the problem that the detection result is inaccurate due to surface dust accumulation after long-time use is solved.

Description

Technical Field

[0001] The invention relates to the technical field of spontaneous combustion alarm of electric cabinets, in particular to a spontaneous combustion alarm device for high and low voltage distribution cabinets. Background Art

[0002] The distribution cabinet is divided into power distribution cabinet, lighting distribution cabinet and metering cabinet. It is the terminal equipment of the distribution system. The distribution cabinet is a general term for the motor control center. The distribution cabinet is suitable for occasions with relatively dispersed loads and fewer circuits; the motor control center is used in occasions with concentrated loads and more circuits. They distribute the electric energy of a circuit of the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring and control for the load. The high and low voltage distribution cabinet is the distribution equipment used for power distribution, control, metering and cable connection in the power supply system. Generally, power supply bureaus and substations use high-voltage switch cabinets, which are then led out to the low-voltage distribution cabinet through the low-voltage side of the transformer. The low-voltage distribution cabinet then goes to the distribution board, control box and switch box of each power user. The equipment in it is a distribution device that meets the design functional requirements by assembling some switches, circuit breakers, fuses, buttons, indicator lights, instruments, wires and other protective devices into one.

[0003] For example, a high-security fire alarm device for a power distribution cabinet with the announcement number CN117854218B. Technical problem: The smoke sensor cannot detect the spontaneous combustion phenomenon in the first time. Technical solution: Circular hole one, the channel and circular hole two are interconnected; at least three smoke sensors are fixedly connected to the box body, and the smoke sensor is located in the channel; when in use, the smoke sensor is set on the heat dissipation path, and the smoke will flow quickly to the surrounding of the smoke sensor along with the heat dissipation airflow, so that the alarm light will sound an alarm at the first time of spontaneous combustion, avoiding the problem of slow alarm response of the alarm light due to poor air flow in the local area of ​​the box body, greatly improving the safety performance, and at the same time, the space between the box body and the connecting plate is divided into a wavy channel by a partition, so that the air in the box body flows through the narrow channel, so that the smoke can fully flow around the smoke sensor to avoid missed detection.

[0004] The above patent avoids the problem of slow alarm response of the alarm light caused by poor air flow in local areas of the box. However, in actual use, the smoke alarm is in the path of airflow for a long time, and the dust driven by the airflow will pass through the smoke alarm and some of it will stick to its surface. Long-term exposure to this environment will cause a large amount of dust to accumulate on the detection surface of the smoke alarm. The accumulation of dust has a certain impact on the detection results of the smoke alarm, which may result in failure to alarm in time when a spontaneous combustion fire occurs. During long-term use, the smoke alarm will age, fail or even be damaged. When the smoke alarm ages, fails or even is damaged, the distribution cabinet will not automatically alarm when spontaneous combustion occurs, which will result in the inability to extinguish the fire and repair the distribution cabinet, and may also cause a fire. There are still certain defects when using it.

[0005] In view of the above problems, a spontaneous combustion alarm device for high and low voltage distribution cabinets is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a spontaneous combustion alarm device for high and low voltage distribution cabinets. The device is used to work, thereby solving the problem in the above background that during actual use, the smoke alarm is in the path of airflow for a long time, which will cause the dust driven by the airflow to pass through the smoke alarm and part of it will stick to its surface. Being in this environment for a long time will cause a large amount of dust to accumulate on the detection surface of the smoke alarm. The accumulation of dust has a certain influence on the detection result of the smoke alarm, which may lead to the failure to timely alarm when a spontaneous combustion fire occurs. During long-term use, the smoke alarm will age, fail or even be damaged. When the smoke alarm ages, fails or even is damaged, the distribution cabinet cannot automatically alarm when it spontaneously combusts, which will result in the inability to extinguish the fire and repair the distribution cabinet, and may also cause a fire. There are still certain defects when it is used.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a self-ignition alarm device for a high and low voltage distribution cabinet, comprising a distribution cabinet body and a breathable filter plate fixedly installed on both sides of the distribution cabinet body, the inner walls of the breathable filter plate are fixedly installed with a shell, the interior of the shell is fixedly installed with an exhaust fan, the side walls of the distribution cabinet body are fixedly installed with a fixed block, a groove is provided inside the fixed block, a smoke alarm is fixedly installed on the upper inner wall of the groove, a sound and light alarm is fixedly installed on the upper end of the fixed block, and a cleaning structure is installed between the inner walls on both sides of the groove.

[0008] Furthermore, an air guide groove is provided inside the shell, and one end of the air guide groove is covered on the periphery of the air permeable filter plate.

[0009] Furthermore, the cleaning structure includes a connecting rod fixedly installed on the lower ends of the inner walls on both sides of the groove, a rotating rod is installed between the two connecting rods for common rotation, fixing rings are fixedly installed on both sides of the rotating rod, and fan blades are fixedly installed at equal distances on the outer circumference of the fixing ring.

[0010] Furthermore, a plurality of connecting rods 2 are fixedly mounted in the middle of the rotating rod, a cleaning cloth strip is fixedly mounted at one end of each of the connecting rods 2, and the cleaning cloth strip is slidably connected to the surface of the smoke alarm.

[0011] Furthermore, a backup alarm structure is installed on the fixed block, and the backup alarm structure includes a metal shell fixedly installed on the inner wall of the upper end of the slot, and a chamber is opened inside the metal shell.

[0012] Furthermore, a piston slider is slidably connected to the interior of the chamber, and the lower end chamber of the piston slider is filled with an inert gas that is easily expanded when heated.

[0013] Furthermore, a spring is fixedly installed between the upper end of the piston slider and the inner wall of the chamber, connecting blocks are fixedly installed on both sides of the upper end of the piston slider, a sliding groove is opened inside the fixed block, and a moving contact is fixedly installed at one end of the connecting block, and the moving contact is movably connected in the sliding groove.

[0014] Furthermore, a power supply battery is fixedly installed at the upper end, and two poles of the power supply battery are respectively connected to the static contact and the moving contact.

[0015] Furthermore, the static contact and the moving contact cooperate to form a switch of a backup alarm structure.

[0016] Furthermore, the smoke alarm is electrically connected to the sound and light alarm, the backup alarm structure is electrically connected to the sound and light alarm, and the circuits of the smoke alarm and the backup alarm structure are connected in parallel with the sound and light alarm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When spontaneous combustion occurs inside the power distribution cabinet, a large amount of smoke will be generated. In the process of the exhaust fan driving the smoke to be discharged outwards, the smoke will come into contact with the smoke alarm and trigger the smoke alarm. The smoke alarm will sound an alarm and transmit a signal to the sound and light alarm at the same time. When the exhaust fan drives the air to flow, a larger airflow is discharged outwards from the air permeable filter plate. In the process of the airflow flowing outwards, it drives the cleaning structure to clean the detection surface of the smoke alarm, so that its detection surface is always in a clean state, solving the problem of inaccurate detection results caused by surface dust accumulation after long use. When the exhaust fan is in the process of discharging the air in the power distribution cabinet body outwards, it comes into contact with the fan blades. At this time, the airflow drives the fan blades and the fixed ring to rotate, and the fixed ring drives the middle rotating rod to rotate between the two connecting rods 1. At this time, the rotating rod drives the middle connecting rod 2 to rotate. When the connecting rod 2 rotates, it drives the cleaning cloth strip fixed at its end to rotate, and the cleaning cloth strip wipes along the surface of the smoke alarm to clean the detection surface of the smoke alarm. Automatic cleaning; when spontaneous combustion occurs inside the distribution cabinet body, the spontaneous combustion will produce flames, and the flames will quickly heat the air inside the distribution cabinet body. At this time, the exhaust fan drives the outflowing air to be a hot air flow. When the hot air flow flows to the surface of the metal shell, due to the properties of its metal material, it will quickly absorb heat and conduct the absorbed heat into the chamber, heating the inert gas at the lower end of the piston slider in the chamber. The inert gas expands rapidly due to the heat and pushes the piston slider upward. The piston slider moves upward along the chamber and drives the connecting block and the moving contact to move upward along the slide groove. When the moving contact is pushed to contact the static contact at the upper end, a closed circuit is formed between the power supply battery, the moving contact, the static contact and the sound and light alarm. The sound and light alarm automatically alarms when the power is turned on. When the smoke alarm is damaged, the high-temperature gas driven out by the exhaust fan can still trigger the sound and light alarm to alarm, thereby preventing the distribution box from being discovered in time after spontaneous combustion due to damage to the smoke alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional cross-sectional structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing block system of the present invention;

[0022] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixing block system of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the cleaning structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the cross-sectional side structure of the fixing block system of the present invention;

[0025] Figure 7 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 8 It is a working diagram of the sound and light alarm of the present invention;

[0027] Fig. 9 It is a partial circuit diagram of the sound and light alarm of the present invention.

[0028] In the figure: 1. Distribution cabinet body; 11. Breathable filter plate; 2. Fixed block; 21. Slot; 3. Shell; 31. Air guide groove; 4. Exhaust fan; 5. Sound and light alarm; 6. Smoke alarm; 7. Cleaning structure; 71. Connecting rod 1; 72. Rotating rod; 73. Fixed ring; 74. Fan blade; 75. Connecting rod 2; 76. Cleaning cloth strip; 8. Backup alarm structure; 81. Metal shell; 82. Chamber; 83. Piston slider; 84. Spring; 85. Connecting block; 86. Moving contact; 87. Slide; 88. Static contact; 89. Power supply battery. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0030] In order to solve the technical problem that after long-term use, the surface of the smoke alarm may cause inaccurate detection due to dust accumulation, such as Figure 1 - Figure 7 As shown, the following preferred technical solutions are provided: a spontaneous combustion alarm device for a high and low voltage distribution cabinet, comprising a distribution cabinet body 1 and a breathable filter plate 11 fixedly installed on both sides of the distribution cabinet body 1, the inner walls of the breathable filter plate 11 are fixedly installed with a shell 3, the interior of the shell 3 is fixedly installed with an exhaust fan 4, the side wall of the distribution cabinet body 1 is fixedly installed with a fixed block 2, a groove 21 is provided inside the fixed block 2, a smoke alarm 6 is fixedly installed on the inner wall at the upper end of the groove 21, a sound and light alarm 5 is fixedly installed on the upper end of the fixed block 2, and a cleaning structure 7 is installed between the inner walls on both sides of the groove 21.

[0031] Specifically, when the power distribution cabinet is in normal use, the exhaust fans 4 inside the shell 3 installed on the side walls of the air permeable filter plates 11 on both sides rotate in the same direction, driving the gas flow in the power distribution cabinet. The exhaust fans 4 suck the outside air into the power distribution cabinet through the air permeable filter plate 11, and the exhaust fans 4 on the other side discharge the gas inside the power distribution cabinet again along the air guide groove 31 and the air permeable filter plate 11 and finally out of the slot 21. When spontaneous combustion occurs inside the power distribution cabinet, a large amount of smoke will be generated. When the exhaust fans 4 drive the gas flow in the power distribution cabinet body 1, the generated smoke will be The generated smoke is discharged outwards along the exhaust fan 4. In the process of discharging the smoke outwards, it contacts the smoke alarm 6 and triggers the smoke alarm 6. The smoke alarm 6 alarms and transmits a signal to the sound and light alarm 5 while alarming. When the exhaust fan 4 drives the air to flow, a larger airflow is discharged outwards from the air permeable filter plate 11. In the process of the airflow flowing outwards, the cleaning structure 7 is driven to clean the detection surface of the smoke alarm 6, so that its detection surface is always in a clean state, thereby solving the problem of inaccurate detection results caused by dust accumulation on the surface over a long period of use.

[0032] In order to solve the technical problem that the surface of the smoke alarm 6 cannot be self-cleaned during use, such as Figure 2 - Figure 4 As shown, the following preferred technical solution is provided: an air guide groove 31 is opened inside the shell 3, one end of the air guide groove 31 is covered on the outer periphery of the breathable filter plate 11, and the exhaust fan 4 drives the gas to flow in and out of the distribution cabinet body 1 along the air guide groove 31. The setting of the air guide groove 31 facilitates the centralized entry and exit of gas.

[0033] The cleaning structure 7 includes a connecting rod 71 fixedly installed at the lower ends of the inner walls on both sides of the groove 21, and a rotating rod 72 is installed between the two connecting rods 71 ​​for common rotation. Fixed rings 73 are fixedly installed on both sides of the rotating rod 72, and fan blades 74 are fixedly installed on the outer periphery of the fixed ring 73 at equal intervals. When the exhaust fan 4 discharges the air in the distribution cabinet body 1 to the outside, a large airflow can be generated. When the airflow flows out along the breathable filter plate 11, the fixed ring 73 and the rotating rod 72 can be driven to rotate through the fan blades 74.

[0034] A plurality of connecting rods 75 are fixedly installed in the middle of the rotating rod 72, and a cleaning cloth strip 76 is fixedly installed at one end of each of the connecting rods 75. The cleaning cloth strip 76 is slidably connected to the surface of the smoke alarm 6. When the fan blade 74 is driven to rotate by the airflow, the cleaning cloth strip 76 can be driven to slide along the surface of the smoke alarm 6 to automatically wipe and clean its surface.

[0035] Specifically, when the exhaust fan 4 discharges the air in the distribution cabinet body 1 to the outside, the airflow is discharged outward along the air guide groove 31 and the breathable filter plate 11, and contacts the fan blades 74 in the process of flowing outward. At this time, the airflow drives the fan blades 74 and the fixed ring 73 to rotate, and the fixed ring 73 drives the middle rotating rod 72 to rotate between the two connecting rods 1 71. At this time, the rotating rod 72 drives the middle connecting rod 2 75 to rotate. When the connecting rod 2 75 rotates, it drives the cleaning cloth strip 76 fixed at its end to rotate, and the cleaning cloth strip 76 wipes along the surface of the smoke alarm 6. The airflow generated by the exhaust fan 4 that drives the airflow and heat dissipation can drive the cleaning cloth strip 76 to circulate and automatically clean the detection surface of the smoke alarm 6.

[0036] In order to solve the technical problem that the smoke alarm 6 cannot be used to alarm in time when it is damaged and malfunctions, Figure 4 - Fig. 9 As shown, the following preferred technical solution is provided: a backup alarm structure 8 is installed on the fixed block 2, and the backup alarm structure 8 includes a metal shell 81 fixedly installed on the inner wall of the upper end of the slot 21, and a chamber 82 is opened inside the metal shell 81. The heat conduction and heat dissipation effects of the metal shell 81 are faster, and the temperature of the airflow can quickly affect the interior of the metal shell 81.

[0037] The interior of the chamber 82 is slidably connected to a piston slider 83, and the lower end chamber 82 of the piston slider 83 is filled with an inert gas that easily expands when heated. When the distribution box body 1 spontaneously ignites, the temperature of the air flowing out of the exhaust fan 4 is much higher than usual. The high-temperature airflow can quickly affect the inert gas in the chamber 82 through the metal shell 81, causing it to expand rapidly due to heat.

[0038] A spring 84 is fixedly installed between the upper end of the piston slider 83 and the inner wall of the chamber 82, and connecting blocks 85 are fixedly installed on both sides of the upper end of the piston slider 83. A slide groove 87 is provided inside the fixed block 2, and a moving contact 86 is fixedly installed at one end of the connecting block 85. The moving contact 86 is movably connected in the slide groove 87. The spring 84 can pull the piston slider 83 to a place where the inert gas in the chamber 82 is denser at room temperature, and expand when heated to push the piston slider 83 a longer distance.

[0039] A static contact 88 is fixedly installed on the inner wall of the upper end of the slide groove 87, and a power supply battery 89 is fixedly installed on the upper end of the static contact 88. The two poles of the power supply battery 89 are respectively connected to the static contact 88 and the moving contact 86. When the inert gas expands and drives the moving contact 86 and the static contact 88 to contact each other, the power can be turned on and the sound and light alarm 5 can be triggered.

[0040] The static contact 88 and the moving contact 86 cooperate to form a switch of the backup alarm structure 8. Fig. 9As shown in the partial circuit diagram, when the static contact 88 and the moving contact 86 are in contact, a loop can be formed to supply power to the sound and light alarm 5 so that it can automatically turn on the alarm.

[0041] The smoke alarm 6 is electrically connected to the sound and light alarm 5, the backup alarm structure 8 is electrically connected to the sound and light alarm 5, and the circuits of the smoke alarm 6 and the backup alarm structure 8 are connected in parallel with the sound and light alarm 5. Figure 8 As shown in the flowchart, in daily use, the route in the upper part is used to simultaneously use the smoke alarm 6 and the sound and light alarm 5 to perform spontaneous combustion detection alarms. When the smoke alarm 6 fails, the sound and light alarm 5 is triggered to alarm through the route in the lower part.

[0042] Specifically, when spontaneous combustion occurs inside the power distribution cabinet body 1, the spontaneous combustion will generate flames, and the flames will quickly heat the air inside the power distribution cabinet body 1. At this time, the exhaust fan 4 drives the outflowing air to be a hot air flow. When the hot air flow flows to the surface of the metal shell 81, due to the properties of the metal material, it will quickly absorb heat and conduct the absorbed heat to the chamber 82, heating the inert gas at the lower end of the piston slider 83 in the chamber 82. The inert gas expands rapidly due to the heat and pushes the piston slider 83 upward, and the piston slider 83 moves along the chamber 82 to The moving contact 86 moves upward and drives the connecting block 85 and the moving contact 86 to move upward along the slide groove 87. When the moving contact 86 is pushed to contact the static contact 88 at the upper end, a closed circuit is formed between the power supply battery 89, the moving contact 86, the static contact 88 and the sound and light alarm 5. The sound and light alarm 5 automatically alarms when the power is turned on. When the smoke alarm 6 is damaged, the high-temperature gas flowing out through the exhaust fan 4 can still trigger the sound and light alarm 5 to alarm, thereby preventing the spontaneous combustion of the distribution box due to the damage of the smoke alarm 6 from not being discovered in time.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spontaneous combustion alarm device for a high and low voltage distribution cabinet, comprising a distribution cabinet body (1) and a breathable filter plate (11) fixedly mounted on both sides of the distribution cabinet body (1), the inner wall of the breathable filter plate (11) is fixedly mounted with a shell (3), and the interior of the shell (3) is fixedly mounted with an exhaust fan (4), characterized in that: A fixing block (2) is fixedly mounted on the side wall of the power distribution cabinet body (1), a slot (21) is provided inside the fixing block (2), a smoke alarm (6) is fixedly mounted on the upper inner wall of the slot (21), an audible and visual alarm (5) is fixedly mounted on the upper end of the fixing block (2), and a cleaning structure (7) is installed between the inner walls on both sides of the slot (21).

2. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 1, characterized in that: An air guide groove (31) is provided inside the shell (3), and one end of the air guide groove (31) is wrapped around the outer periphery of the air permeable filter plate (11).

3. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 1, characterized in that: The cleaning structure (7) comprises a connecting rod (71) fixedly mounted on the lower ends of the inner walls on both sides of the slot (21), a rotating rod (72) being mounted between the two connecting rods (71) for common rotation, a fixing ring (73) being fixedly mounted on both sides of the rotating rod (72), and fan blades (74) being fixedly mounted at equal intervals on the outer circumference of the fixing ring (73).

4. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 3, characterized in that: A plurality of connecting rods (75) are fixedly mounted in the middle of the rotating rod (72), and a cleaning cloth strip (76) is fixedly mounted at one end of each of the connecting rods (75), and the cleaning cloth strip (76) is slidably connected to the surface of the smoke alarm (6).

5. The spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 1 is characterized in that: A backup alarm structure (8) is installed on the fixed block (2), and the backup alarm structure (8) comprises a metal shell (81) fixedly installed on the inner wall of the upper end of the slot (21), and a chamber (82) is provided inside the metal shell (81).

6. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 5, characterized in that: The interior of the chamber (82) is slidably connected to a piston slider (83), and the chamber (82) at the lower end of the piston slider (83) is filled with an inert gas that is easily expanded when heated.

7. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 6, characterized in that: A spring (84) is fixedly installed between the upper end of the piston slider (83) and the inner wall of the chamber (82), and connecting blocks (85) are fixedly installed on both sides of the upper end of the piston slider (83). A sliding groove (87) is provided inside the fixed block (2), and a moving contact (86) is fixedly installed at one end of the connecting block (85), and the moving contact (86) is movably connected in the sliding groove (87).

8. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 7, characterized in that: A static contact (88) is fixedly mounted on the inner wall of the upper end of the slide groove (87), a power supply battery (89) is fixedly mounted on the upper end of the static contact (88), and two poles of the power supply battery (89) are respectively connected to the static contact (88) and the moving contact (86).

9. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 8, characterized in that: The static contact (88) and the moving contact (86) cooperate to form a switch of the backup alarm structure (8).

10. A spontaneous combustion alarm device for high and low voltage distribution cabinets according to claim 5, characterized in that: The smoke alarm (6) is electrically connected to the sound and light alarm (5), the backup alarm structure (8) is electrically connected to the sound and light alarm (5), and the circuits of the smoke alarm (6) and the backup alarm structure (8) are connected in parallel with the sound and light alarm (5).

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