Low-voltage switch cabinet capable of automatically extinguishing fire
By introducing smoke sensors and pressure relief and exhaust mechanisms into the low-pressure switch cabinet, the waste of carbon dioxide high-pressure gas and the increase in air pressure during fire extinguishing are solved, automatic fire extinguishing and air pressure management are realized, and the safety and stability of the equipment are improved.
Patent Information
- Application Number
- CN202420844876.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-23
AI Technical Summary
When fire occurs in existing low-pressure switch cabinets, the carbon dioxide high-pressure gas fire extinguishing method leads to gas waste and the increase in the cabinet air pressure, which may lead to the problem of explosion.
An automatic fire-extinguishing low-pressure switch cabinet including smoke sensor, microcontroller, clamping mechanism and pressure relief and exhaust mechanism was designed. The smoke signal was detected through the smoke sensor, the gas pump and valve released carbon dioxide gas, and the fire was extinguished through the nozzle pipe. Use the pressure relief and exhaust mechanism to reduce the internal air pressure to prevent explosion.
The stable placement of carbon dioxide high-pressure gas cylinders and the effective discharge of internal air pressure are achieved, which avoids deformation or explosion of the cabinet, and improves fire extinguishing efficiency and safety.
Smart Images
Figure CN222172920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage switch cabinets, and more specifically, to a low-voltage switch cabinet capable of automatically extinguishing fire. Background Art
[0002] Low-voltage switchgear is suitable for power plants, petroleum, chemical, metallurgy, textile, high-rise buildings and other industries for power transmission, distribution and power conversion. When the low-voltage switchgear is in use, due to the high temperature inside the cabinet, the aging of the line after long-term use can easily cause open flames inside the cabinet, thus causing safety accidents.
[0003] In view of the problem that when a fire occurs in the circuit inside the existing low-voltage switch cabinet during use, the fire cannot be extinguished quickly and effectively, resulting in damage to the entire device and causing great losses, the Chinese utility model patent with publication number CN209233179U discloses an automatic rapid fire extinguishing low-voltage switch cabinet. The technical effect of this technical solution is that it can achieve automatic and rapid fire extinguishing during use.
[0004] The fire extinguishing method adopted by the low-voltage switch cabinet designed by the above patent is carbon dioxide high-pressure gas fire extinguishing. However, in actual use, its structure adopts the method of melting the tube body to discharge the carbon dioxide gas when an open flame occurs, which causes great waste. The damage of the tube body itself will affect the blowing position of the gas, and when an open flame occurs, movable shutters are used to prevent external gas from entering. However, it also leads to the fact that the carbon dioxide gas will be quickly released from the inside of the carbon dioxide high-pressure gas cylinder, which increases the air pressure inside the low-voltage switch cabinet, causing the cabinet to deform or explode due to the increase in internal air pressure. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a low-voltage switch cabinet capable of automatically extinguishing fire.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-voltage switch cabinet capable of automatic fire extinguishing, comprising a low-voltage switch cabinet body, wherein the bottom inner wall of the low-voltage switch cabinet body is fixedly connected with a partition in the horizontal direction, and the bottom inner wall of the low-voltage switch cabinet body is located below the partition and fixedly installed with a placement seat, a carbon dioxide high-pressure gas cylinder is installed on the top of the placement seat, a clamping mechanism for locking the carbon dioxide high-pressure gas cylinder is fixedly installed on the bottom of the partition, the bottom inner wall of the low-voltage switch cabinet body is located above the partition and fixedly connected with a horizontal plate in the horizontal direction, and the tops of both ends of the horizontal plate are fixedly connected in the vertical direction near the two inner side walls of the low-voltage switch cabinet body. There is a vertical plate, and a first branch pipe and a second branch pipe are respectively installed between the two inner walls of the low-voltage switch cabinet and the outer sides of the two vertical plates in the vertical direction, and a plurality of nozzle pipes extending to the inner side of the vertical plate are installed on the first branch pipe and the second branch pipe. A bottle mouth pipe is provided at one end of the carbon dioxide high-pressure gas cylinder, and an air pump is fixedly installed on the bottom inner wall of the low-voltage switch cabinet near the upper position of the bottle mouth pipe, a valve is installed on the bottle mouth pipe, and the end of the bottle mouth pipe is connected to the air inlet end of the air pump, and the air outlet end of the air pump is connected to a three-way pipe, and the other two ports of the three-way pipe are connected to the ends of the first branch pipe and the second branch pipe, and both side walls of the low-voltage switch cabinet have pressure relief and exhaust mechanisms.
[0007] As a further improvement of the technical solution of the utility model, a single-chip microcomputer is installed on the bottom inner wall of the low-voltage switch cabinet body below the partition, and a smoke sensor is installed on the top inner wall of the low-voltage switch cabinet body. The front end of the low-voltage switch cabinet body is connected to a door panel by a hinge, and a number of mounting plates for installing electrical equipment are connected between the inner walls of the two vertical plates. A placement groove matching the external shape of a carbon dioxide high-pressure cylinder is provided on the top of the placement seat.
[0008] As a further improvement of the technical solution of the utility model, the clamping mechanism includes a fixed shell fixedly connected to the bottom end of the partition, the bottom of the fixed shell is connected to a movable column in the vertical direction, the bottom end of the movable column is located at the top of the carbon dioxide high-pressure gas cylinder and is fixedly connected to a clamping block, and the top end of the movable column extends to the interior of the fixed shell and is fixedly connected to a movable plate, an movable cavity is provided in the interior of the fixed shell corresponding to the outside of the movable plate in the vertical direction, and a second spring is connected between the top of the movable plate and the top inner wall of the movable cavity.
[0009] As a further improvement of the technical solution of the utility model, the top end of the fixed shell and the bottom end of the partition are fixedly connected by screws, and the block and the bottom end of the movable column are fixedly connected by screws.
[0010] As a further improvement of the technical solution of the utility model, the air pump is fixedly connected to the bottom inner wall of the low-voltage switch cabinet body by bolts, and the three-way pipe is arranged above the partition.
[0011] As a further improvement of the technical solution of the utility model, the pressure relief and exhaust mechanism includes a fixed cavity arranged on the inner wall of the low-voltage switch cabinet, a fixed seat is fixedly installed on the inner wall of the fixed cavity, a telescopic rod is movably connected to the inner side of the end of the fixed seat in the horizontal direction, one end of the telescopic rod is located inside the fixed cavity and is fixedly connected to a baffle, a first spring is connected between the inside of the fixed seat and the end of the telescopic rod, air holes are arranged at the upper and lower sides of the fixed cavity, and a plurality of connecting holes are connected between the two air holes and the fixed cavity.
[0012] As a further improvement of the technical solution of the utility model, one end of the air hole extends to the outside of the low-voltage switch cabinet body, and the inside of the air hole is connected to the inside of the fixed cavity through a connecting hole.
[0013] The utility model senses the smoke generated inside the low-voltage switch cabinet through a smoke sensor. When a smoke signal is detected, the detected signal is transmitted to the single-chip microcomputer, and then the single-chip microcomputer issues a command to control the air pump and valve to open. After the valve is opened, the carbon dioxide high-pressure gas cylinder releases the internal pressure to discharge the carbon dioxide gas. The discharged carbon dioxide gas is guided out by the set air pump and diverted to the inside of the first branch pipe and the second branch pipe through the three-way pipe, and the carbon dioxide gas is discharged through the nozzle pipes on the first branch pipe and the second branch pipe to automatically extinguish the open fire inside the low-voltage switch cabinet. And it has the following beneficial effects during use:
[0014] 1. By setting a clamping mechanism, it is used in conjunction with the placement seat to clamp the placed carbon dioxide high-pressure gas cylinder to improve the stability of the carbon dioxide high-pressure gas cylinder when placed. During the placement of the carbon dioxide high-pressure gas cylinder, the clamping block on the clamping mechanism is pushed upward. At this time, the second spring is in a compressed state. After the carbon dioxide high-pressure gas cylinder is placed on the top of the placement seat, the force pushing the clamping block on the clamping mechanism upward is released, and the second spring will reset, pushing the movable plate to drive the movable column and the clamping block to descend to clamp the top of the carbon dioxide high-pressure gas cylinder, thereby improving the stability of the carbon dioxide high-pressure gas cylinder when placed and avoiding deviation;
[0015] 2. By setting a pressure relief and exhaust mechanism, when in use, after the valve and the air pump are opened, the carbon dioxide gas will be quickly released from the inside of the carbon dioxide high-pressure gas cylinder, which will cause the air pressure inside the low-pressure switch cabinet to increase. The set pressure relief and exhaust mechanism can relieve the internal air pressure. When in use, the increase in air pressure will exert an outward thrust on the baffle on the pressure relief and exhaust mechanism, causing the baffle to move laterally inside the fixed cavity, and drive the telescopic rod to squeeze the first spring to contract to the inside of the fixed seat. When the moving position of the baffle exceeds the position of the connecting hole, the gas is discharged to the outside of the low-pressure switch cabinet through the connecting hole and the air hole. When the air pressure inside the low-pressure switch cabinet decreases, the resetting of the first spring pushes the telescopic rod to move inward and resets the baffle, thereby blocking the external oxygen-containing gas from entering and discharging the internal high-pressure gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 It is the front view of the utility model.
[0018] Figure 3 It is a schematic diagram of the structure of the placement of the carbon dioxide high-pressure gas cylinder in the utility model.
[0019] Figure 4 It is a structural schematic diagram of the placement seat in the utility model.
[0020] Figure 5 For this utility model Figure 1 Enlarged view of part A.
[0021] Figure 6 For this utility model Figure 1 Enlarged view of part B.
[0022] The accompanying drawings are marked as follows: 1. low-voltage switch cabinet body; 2. partition; 3. placement seat; 4. carbon dioxide high-pressure cylinder; 5. clamping mechanism; 6. single-chip microcomputer; 7. horizontal plate; 8. vertical plate; 9. door plate; 10. mounting plate; 11. bottle mouth pipe; 12. valve; 13. air pump; 14. three-way pipe; 15. first branch pipe; 16. second branch pipe; 17. nozzle pipe; 18. fixed cavity; 19. baffle; 20. fixed seat; 21. telescopic rod; 22. first spring; 23. air hole; 24. connecting hole; 25. smoke sensor; 301. placement slot; 501. fixed shell; 502. movable column; 503. block; 504. movable plate; 505. movable cavity; 506. second spring. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] As attached Figure 1-6 The low-voltage switch cabinet with automatic fire extinguishing shown in the figure comprises a low-voltage switch cabinet body 1, the bottom inner wall of the low-voltage switch cabinet body 1 is fixedly connected with a partition 2 in the horizontal direction, and the bottom inner wall of the low-voltage switch cabinet body 1 is located below the partition 2 and is fixedly installed with a placement seat 3, a carbon dioxide high-pressure gas cylinder 4 is installed on the top of the placement seat 3, and a clamping mechanism 5 for locking the carbon dioxide high-pressure gas cylinder 4 is fixedly installed at the bottom of the partition 2. The bottom inner wall of the low-voltage switch cabinet body 1 is located above the partition 2 and is fixedly connected with a horizontal plate 7 in the horizontal direction. The tops of both ends of the horizontal plate 7 are fixedly connected with vertical plates 8 in the vertical direction near the two inner side walls of the low-voltage switch cabinet body 1. The two inner side walls of the low-voltage switch cabinet body 1 and A first branch pipe 15 and a second branch pipe 16 are respectively installed between the outer sides of the two vertical plates 8 in the vertical direction. A plurality of nozzle pipes 17 extending to the inner side of the vertical plates 8 are installed on the first branch pipe 15 and the second branch pipe 16. A bottle mouth pipe 11 is provided at one end of the carbon dioxide high-pressure gas cylinder 4. An air pump 13 is fixedly installed on the inner side wall of the bottom of the low-pressure switch cabinet body 1 at a position above the bottle mouth pipe 11, a valve 12 is installed on the bottle mouth pipe 11, and the end of the bottle mouth pipe 11 is connected to the air inlet end of the air pump 13, and the air outlet end of the air pump 13 is connected to a three-way pipe 14, and the other two ports of the three-way pipe 14 are connected to the ends of the first branch pipe 15 and the second branch pipe 16. Both side walls of the low-pressure switch cabinet body 1 are provided with pressure relief and exhaust mechanisms.
[0025] As attached Figure 1-4 As shown, a single-chip computer 6 is installed on the bottom inner wall of the low-voltage switch cabinet body 1 below the partition 2, and a smoke sensor 25 is installed on the top inner wall of the low-voltage switch cabinet body 1. The front end of the low-voltage switch cabinet body 1 is connected to a door panel 9 through a hinge, and a plurality of mounting plates 10 for installing electrical equipment are connected between the inner walls of the two vertical plates 8. A placement groove 301 matching the external shape of the carbon dioxide high-pressure gas cylinder 4 is provided on the top of the placement seat 3.
[0026] As can be seen from the above, in the present technical solution, the smoke generated inside the low-voltage switch cabinet body 1 is sensed by the smoke sensor 25. When a smoke signal is detected, the detected signal is transmitted to the single-chip microcomputer 6, and then the single-chip microcomputer 6 issues an instruction to control the air pump 13 and the valve 12 to open. The carbon dioxide high-pressure gas cylinder 4 will release the internal pressure after the valve 12 is opened, so that the carbon dioxide gas is discharged. The discharged carbon dioxide gas is led out by the set air pump 13, and is diverted to the inside of the first branch pipe 15 and the second branch pipe 16 through the three-way pipe 14, and the carbon dioxide gas is discharged through the nozzle pipe 17 on the first branch pipe 15 and the second branch pipe 16 to extinguish the open fire inside the low-voltage switch cabinet body 1.
[0027] As attached Figure 1 and attached Figure 3 As shown, the clamping mechanism 5 includes a fixed shell 501 fixedly connected to the bottom end of the partition 2, the bottom of the fixed shell 501 is connected to a movable column 502 in the vertical direction, the bottom end of the movable column 502 is located at the top of the carbon dioxide high-pressure gas cylinder 4 and is fixedly connected to a clamping block 503, and the top end of the movable column 502 extends to the inside of the fixed shell 501 and is fixedly connected to a movable plate 504, the inside of the fixed shell 501 is provided with an movable cavity 505 corresponding to the outside of the movable plate 504 in the vertical direction, a second spring 506 is connected between the top of the movable plate 504 and the top inner wall of the movable cavity 505, the top of the fixed shell 501 is fixedly connected to the bottom end of the partition 2 by screws, and the clamping block 503 and the bottom end of the movable column 502 are fixedly connected by screws.
[0028] As can be seen from the above, the clamping mechanism 5 is used in conjunction with the placement seat 3 to clamp the placed carbon dioxide high-pressure gas cylinder 4 to improve the stability of the carbon dioxide high-pressure gas cylinder 4 when placed. During the placement of the carbon dioxide high-pressure gas cylinder 4, the clamping block 503 on the clamping mechanism 5 is pushed upward. At this time, the second spring 506 is in a compressed state. When the carbon dioxide high-pressure gas cylinder 4 is placed on the top of the placement seat 3, the force pushing the clamping block 503 on the clamping mechanism 5 upward is released, and the second spring 506 will reset, pushing the movable plate 504 to drive the movable column 502 and the clamping block 503 to descend to clamp the top of the carbon dioxide high-pressure gas cylinder 4, thereby improving the stability of the carbon dioxide high-pressure gas cylinder 4 when placed and avoiding deviation.
[0029] As attached Figure 1 and attached Figure 5 As shown, the air pump 13 is fixedly connected to the bottom inner wall of the low-voltage switch cabinet body 1 by bolts, and the three-way pipe 14 is arranged above the partition 2 to facilitate the stable installation of the air pump 13 and enable the three-way pipe 14 to be stably connected to the first branch pipe 15 and the second branch pipe 16.
[0030] As attached Figure 1 and attached Figure 6As shown, the pressure relief exhaust mechanism includes a fixed cavity 18 arranged on the inner wall of the low-voltage switch cabinet body 1, a fixed seat 20 is fixedly installed on the inner wall of the fixed cavity 18, a telescopic rod 21 is movably connected to the inner side of the end of the fixed seat 20 in the horizontal direction, one end of the telescopic rod 21 is located inside the fixed cavity 18 and is fixedly connected to a baffle 19, a first spring 22 is connected between the inside of the fixed seat 20 and the end of the telescopic rod 21, air holes 23 are arranged at the upper and lower sides of the fixed cavity 18, a plurality of connecting holes 24 are connected between the two air holes 23 and the fixed cavity 18, one end of the air hole 23 extends to the outside of the low-voltage switch cabinet body 1, and the inside of the air hole 23 is connected to the inside of the fixed cavity 18 through the connecting hole 24.
[0031] As can be seen from the above, when the pressure relief and exhaust mechanism is in use, after the valve 12 and the air pump 13 are opened, the carbon dioxide gas will be quickly released from the inside of the carbon dioxide high-pressure gas cylinder 4, which will cause the air pressure inside the low-pressure switch cabinet body 1 to increase. The pressure relief and exhaust mechanism can relieve the internal air pressure. When in use, the increase in air pressure will exert an outward thrust on the baffle 19 on the pressure relief and exhaust mechanism, so that the baffle 19 moves laterally inside the fixed cavity 18, and drives the telescopic rod 21 to squeeze the first spring 22 to shrink to the inside of the fixed seat 21. When the movable position of the baffle 19 exceeds the position of the connecting hole 24, the gas is discharged to the outside of the low-pressure switch cabinet body 1 through the connecting hole 24 and the air hole 23. When the air pressure inside the low-pressure switch cabinet body 1 decreases, the first spring 22 is reset to push the telescopic rod 21 to move inward and reset the baffle 19, so that the internal high-pressure gas can be discharged while blocking the external oxygen-containing gas from entering.
[0032] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance (such as the smoke sensor 25 and the single-chip computer 6) are not specifically limited, and conventional equipment can be used. In addition, the electrical control components not mentioned in the present technical solution belong to the prior art, so they are not shown in the figure and will not be described in detail in the specification.
[0033] Among them, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0034] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A low-voltage switch cabinet capable of automatically extinguishing fire, comprising a low-voltage switch cabinet body (1), characterized in that: The bottom inner wall of the low-voltage switch cabinet body (1) is fixedly connected to a partition (2) in the horizontal direction, and a placement seat (3) is fixedly installed on the bottom inner wall of the low-voltage switch cabinet body (1) below the partition (2), a carbon dioxide high-pressure gas cylinder (4) is installed on the top of the placement seat (3), and a clamping mechanism (5) for locking the carbon dioxide high-pressure gas cylinder (4) is fixedly installed on the bottom of the partition (2), and a horizontal plate (7) is fixedly connected to the bottom inner wall of the low-voltage switch cabinet body (1) above the partition (2), and vertical plates (8) are fixedly connected to the top of both ends of the horizontal plate (7) near the two inner side walls of the low-voltage switch cabinet body (1) in the vertical direction, and the two inner side walls of the low-voltage switch cabinet body (1) and the outer sides of the two vertical plates (8) are respectively A first branch pipe (15) and a second branch pipe (16) are installed, and a plurality of nozzle pipes (17) extending to the inner side of the vertical plate (8) are installed on the first branch pipe (15) and the second branch pipe (16). A bottle mouth pipe (11) is provided at one end of the carbon dioxide high-pressure gas cylinder (4). An air pump (13) is fixedly installed on the bottom inner wall of the low-voltage switch cabinet body (1) at a position above the bottle mouth pipe (11). A valve (12) is installed on the bottle mouth pipe (11), and the end of the bottle mouth pipe (11) is connected to the air inlet end of the air pump (13). The air outlet end of the air pump (13) is connected to a three-way pipe (14), and the other two ports of the three-way pipe (14) are connected to the ends of the first branch pipe (15) and the second branch pipe (16). Both side walls of the low-voltage switch cabinet body (1) are provided with pressure relief and exhaust mechanisms.
2. The automatic fire extinguishing low-voltage switch cabinet according to claim 1 is characterized in that: A single-chip computer (6) is installed on the bottom inner wall of the low-voltage switch cabinet body (1) located below the partition (2), and a smoke sensor (25) is installed on the top inner wall of the low-voltage switch cabinet body (1). The front end of the low-voltage switch cabinet body (1) is connected to a door panel (9) via a hinge, and a plurality of mounting plates (10) for mounting electrical equipment are connected between the inner walls of the two vertical plates (8). A placement groove (301) matching the external shape of a carbon dioxide high-pressure gas cylinder (4) is provided on the top of the placement seat (3).
3. The automatic fire extinguishing low-voltage switch cabinet according to claim 1 is characterized in that: The clamping mechanism (5) comprises a fixed shell (501) fixedly connected to the bottom end of the partition (2); the bottom of the fixed shell (501) is connected to a movable column (502) in the vertical direction; the bottom end of the movable column (502) is located at the top of the carbon dioxide high-pressure gas cylinder (4) and is fixedly connected to a clamping block (503); the top end of the movable column (502) extends to the inside of the fixed shell (501) and is fixedly connected to a movable plate (504); the inside of the fixed shell (501) is provided with a movable cavity (505) corresponding to the outside of the movable plate (504) in the vertical direction; and a second spring (506) is connected between the top of the movable plate (504) and the top inner wall of the movable cavity (505).
4. The automatic fire extinguishing low-voltage switch cabinet according to claim 3 is characterized in that: The top end of the fixed shell (501) and the bottom end of the partition (2) are fixedly connected by means of screws, and the clamping block (503) and the bottom end of the movable column (502) are fixedly connected by means of screws.
5. The automatic fire extinguishing low-voltage switch cabinet according to claim 1 is characterized in that: The air pump (13) is fixedly connected to the bottom inner wall of the low-voltage switch cabinet body (1) by means of bolts, and the three-way pipe (14) is arranged above the partition plate (2).
6. The automatic fire extinguishing low-voltage switch cabinet according to claim 1 is characterized in that: The pressure relief exhaust mechanism comprises a fixed cavity (18) arranged on the inner wall of a low-voltage switch cabinet body (1), a fixed seat (20) is fixedly installed on the inner wall of the fixed cavity (18), a telescopic rod (21) is movably connected to the inner side of the end of the fixed seat (20) in the horizontal direction, one end of the telescopic rod (21) is located inside the fixed cavity (18) and is fixedly connected to a baffle (19), a first spring (22) is connected between the inside of the fixed seat (20) and the end of the telescopic rod (21), air holes (23) are arranged at upper and lower sides of the fixed cavity (18), and a plurality of connecting holes (24) are connected between the two air holes (23) and the fixed cavity (18).
7. The automatic fire extinguishing low-voltage switch cabinet according to claim 6 is characterized in that: One end of the air hole (23) extends to the outside of the low-voltage switch cabinet body (1), and the inside of the air hole (23) is connected to the inside of the fixed cavity (18) via a connecting hole (24).