CN213183010U - Building fire alarm device - Google Patents
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- CN213183010U CN213183010U CN202021751794.2U CN202021751794U CN213183010U CN 213183010 U CN213183010 U CN 213183010U CN 202021751794 U CN202021751794 U CN 202021751794U CN 213183010 U CN213183010 U CN 213183010U
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Abstract
The utility model discloses a building fire alarm device, which comprises a mounting plate, a sprinkling structure and an air injection structure; mounting a plate: mounting holes are symmetrically formed in four corners of the upper surface of the mounting plate, a vertical fixing plate is arranged on the lower surface of the mounting plate, a water pump is arranged at the left end of the front side surface of the fixing plate, an air pump is arranged at the right end of the front side surface of the fixing plate, a second fixing rod is arranged in the center of the lower surface of the mounting plate, a smoke detector is arranged at the bottom end of the second fixing rod, and an alarm lamp is arranged on; the watering structure: the water pump is arranged at the left end of the front side surface of the fixed plate, and the output port of the water pump is connected with the water inlet on the rear side surface of the sprinkling structure through a water delivery pipe; the air injection structure is as follows: set up respectively in the front side right-hand member of fixed plate and the lower surface right-hand member of mounting panel, the gas outlet of air pump passes through the gas-supply pipe and links to each other with the air inlet of jet-propelled structure trailing flank, and this building fire alarm device enlarges the scope of spraying water and fire-retardant gas, puts out a fire fast.
Description
Technical Field
The utility model relates to a fire control safety technical field specifically is a building fire alarm device.
Background
The fire disaster can cause heavy direct property loss, indirect property loss caused by the fire disaster is more serious and is closely related to various industries of modern society, the whole body is dragged, once heavy and extra-large fire disaster occurs, the caused indirect property loss is large and is often dozens of times of direct property loss, the fire disaster can cause a large amount of casualties, the fire disaster can cause damage of ecological balance, and the fire disaster can cause bad social and political effects, so that the fire hazard is quite tragic, the fire alarm equipment is also the automatic fire alarm electrical equipment, the common fire alarm equipment comprises various fire detectors, manual alarm buttons, fire hydrant pump-up buttons, alarms, field execution modules and the like, the existing fire alarm equipment can not expand the water spraying range, can not avoid the fire disaster from igniting surrounding combustible matters, and can not uniformly spray water, the fire can not be prevented from spreading, the spraying range of the flame-retardant gas can not be enlarged, the fire can not be extinguished quickly, and the flame-retardant gas can not be sprayed uniformly, so that the building fire alarm device is imperative to solve the problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide a building fire alarm device, in time warn personnel, avoid the reaction untimely cause property personnel to lose, enlarge the scope of spraying of water spray and flame retardant gas, put out a fire fast, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: a building fire alarm device comprises a mounting plate, a sprinkling structure and an air injection structure;
mounting a plate: mounting holes are symmetrically formed in four corners of the upper surface of the mounting plate, a vertical fixing plate is arranged on the lower surface of the mounting plate, a water pump is arranged at the left end of the front side surface of the fixing plate, an air pump is arranged at the right end of the front side surface of the fixing plate, a second fixing rod is arranged in the center of the lower surface of the mounting plate, a smoke detector is arranged at the bottom end of the second fixing rod, and an alarm lamp is arranged on;
the watering structure: the water pump is arranged at the left end of the front side surface of the fixed plate, and the output port of the water pump is connected with the water inlet on the rear side surface of the sprinkling structure through a water delivery pipe;
the air injection structure is as follows: the air outlet of the air pump is connected with the air inlet on the rear side surface of the air injection structure through an air delivery pipe, and the air injection structure is in transmission connection with the sprinkling structure through a conveying belt;
wherein: still include the PLC controller, the PLC controller sets up in the leading flank center department of fixed plate, external power source is connected to the input electricity of PLC controller, the water pump, the equal electricity of input of alarm lamp and air pump connects the output of PLC controller, the input of PLC controller is connected to the output electricity of smoke detector, in time warn personnel, avoid reacting untimely causing property personnel's loss, enlarge the scope of water spray, avoid the intensity of a fire to cause the ignition to surrounding combustible substance, evenly spray water, prevent that the intensity of a fire from stretching, enlarge flame retardant gas's spraying range, put out a fire fast, guarantee that flame retardant gas can evenly spray, fully contact with the air.
Further, the watering structure includes motor, rotation axis one, screw rod one, driving gear and driven gear, the leading flank left end of fixed plate is equipped with the motor, and the output shaft front end department of motor is equipped with the driving gear, and the leading flank left end of fixed plate is rotated through the bearing and is connected with screw rod one, and the axis body rear end of screw rod one is equipped with driven gear, and the driving gear is connected with the driven gear meshing, and the output of PLC controller is connected to the input electricity of motor, enlarges the scope of water spray, avoids the intensity of a fire to cause the ignition to surrounding combustible substance.
Further, the sprinkling structure still includes movable block one, spray lance and dead lever one, screw rod threaded connection has movable block one, and the bottom of movable block one is equipped with the spray lance, and the leading flank left end of fixed plate is equipped with fore-and-aft dead lever one, and the upper surface of dead lever one is equipped with the bar mouth, the bar mouth sliding connection of spray lance and dead lever upper surface, and the delivery outlet of water pump passes through the raceway and links to each other with the water inlet of spray lance trailing flank, and the spout department of spray lance leading flank evenly distributed all is equipped with the shower nozzle, evenly sprays water, prevents that the intensity of a fire from stretching.
Further, the air injection structure comprises a second rotating shaft, a first bevel gear, a second bevel gear and a second screw rod, the right end of the front side face of the fixing plate is connected with the second rotating shaft through a bearing in a rotating mode, the second rotating shaft is in belt transmission with the first rotating shaft through a conveying belt, the first bevel gear is arranged at the front end of the second rotating shaft, the right end of the lower surface of the mounting plate is connected with the second screw rod through a bearing in a rotating mode, the second bevel gear is arranged at the top end of the shaft body of the second screw rod and is connected with the first bevel gear in.
Further, the jet-propelled structure still includes movable block two, L shape pole, jet-propelled dish and spout, two threaded connection of screw rod have movable block two, and the right flank of movable block two is equipped with L shape pole, and the leading flank right-hand member of fixed plate is equipped with vertical spout, the vertical body of rod and the spout sliding connection of L shape pole, and the leading flank of movable block two is equipped with jet-propelled dish, and the gas outlet of air pump passes through the gas-supply pipe and links to each other with the air inlet of jet-propelled dish trailing flank, and the leading flank of jet-propelled dish is equipped with evenly distributed's venthole, guarantees that flame retardant gas can evenly spray, fully contacts with.
Compared with the prior art, the beneficial effects of the utility model are that: this building fire alarm device has following benefit:
1. the PLC controller controls the motor to start positive and negative rotation of a certain period, the positive rotation of the motor drives the rotating shaft to start rotating, the rotating shaft drives the driving gear to start rotating, the driving gear is meshed with the driven gear and is connected with the driven gear, the driven gear is driven to start rotating, the screw rod is in threaded connection with the first moving block, the spraying rod arranged at the bottom end of the first moving block is in sliding connection with the strip-shaped opening in the upper surface of the first fixing rod, the first moving block and the spraying rod are driven to start moving towards the front side under the rotation of the first screw rod, the water outlet of the water pump is connected with the water inlet in the rear side face of the spraying rod through the water conveying pipe, nozzles are arranged at positions of nozzles uniformly arranged on the front side face.
2. The second rotating shaft and the first rotating shaft are driven by the conveyor belt, the second rotating shaft is driven to rotate simultaneously under the rotation of the first rotating shaft, the first helical gear is driven to rotate, the first helical gear is meshed with the second helical gear, the second helical gear is driven to rotate under the rotation of the first helical gear, and the second screw is driven to rotate.
3. When the smoke detector detects that the smoke content in the air exceeds the standard, the smoke detector sends an alarm signal, fire information is transmitted to a nearest fire station through an external network cable, and meanwhile, the alarm lamp is controlled by the PLC to start flashing acousto-optic alarm, so that personnel are warned in time, and property personnel loss caused by untimely reaction is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the sprinkling structure of the present invention;
FIG. 4 is a schematic view of the air injection structure of the present invention;
fig. 5 is a left side view structure diagram of the air injection structure of the present invention.
In the figure: the device comprises a mounting plate 1, a mounting hole 2, a fixing plate 3, a water pump 4, a water delivery pipe 5, a water spraying structure 6, a motor 61, a first rotating shaft 62, a first 63 screw rod, a 64 driving gear, a 65 driven gear, a first 66 moving block, a 67 spray rod, a first 68 fixing rod, a 7 air spraying structure, a second 71 rotating shaft, a first 72 helical gear, a second 73 helical gear, a second 74 screw rod, a second 75 moving block, a second 76L-shaped rod, a 77 air spraying disc, a 78 sliding chute, a smoke detector 8, a second 9 fixing rod, a 10 air pipe, an 11 air pump, a 12 conveying belt, a 13 PLC controller and a.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a building fire alarm device comprises a mounting plate 1, a sprinkling structure 6 and an air injection structure 7;
mounting plate 1: the four corners of the upper surface of the mounting plate are symmetrically provided with mounting holes 2, the lower surface of the mounting plate 1 is provided with a vertical fixing plate 3, the left end of the front side surface of the fixing plate 3 is provided with a water pump 4, the right end of the front side surface of the fixing plate 3 is provided with an air pump 11, the center of the lower surface of the mounting plate 1 is provided with a second fixing rod 9, the bottom end of the second fixing rod 9 is provided with a smoke detector 8, the front side surface of the second fixing rod 9 is provided with an alarm lamp 14, the mounting holes 2 in the upper surface of the mounting plate 1 are convenient for mounting and fixing the device, the second fixing rod 9 plays a role in fixedly supporting the smoke detector 8, the water pump 4 provides a water source for on-site fire source delivery, the air pump 11;
the sprinkling structure 6: the water spraying structure 6 is arranged at the left end of the front side face of the fixed plate 3, an output port of the water pump 4 is connected with a water inlet on the rear side face of the water spraying structure 6 through a water conveying pipe 5, the water spraying structure 6 comprises a motor 61, a first rotating shaft 62, a first screw rod 63, a driving gear 64 and a driven gear 65, the motor 61 is arranged at the left end of the front side face of the fixed plate 3, the driving gear 64 is arranged at the front end of an output shaft of the motor 61, the first screw rod 63 is rotatably connected with the left end of the front side face of the fixed plate 3 through a bearing, the driven gear 65 is arranged at the rear end of a shaft body of the first screw rod 63, the driving gear 64 is meshed with the driven gear 65, the water spraying structure 6 further comprises a first moving block 66, a spray rod 67 and a first fixed rod 68, the first screw rod 63 is in threaded connection with the first moving, the spray rod 67 is connected with a strip-shaped opening on the upper surface of the fixed rod 68 in a sliding manner, an output port of the water pump 4 is connected with a water inlet on the rear side surface of the spray rod 67 through a water delivery pipe 5, spray heads are arranged at spray ports uniformly distributed on the front side surface of the spray rod 67, the motor 61 is controlled to rotate in a positive and negative manner in a certain period, the motor 61 rotates in the positive manner to drive the rotating shaft 62 to rotate, the rotating shaft 62 drives the driving gear 64 to rotate, the driving gear 64 is meshed with the driven gear 65 to drive the driven gear 65 to rotate, so as to drive the screw rod 63 to rotate, the screw rod 63 is connected with the moving block 66 in a threaded manner, the spray rod 67 arranged at the bottom end of the moving block 66 is connected with the strip-shaped opening on the upper surface of the fixed rod 68 in a sliding manner, the moving block 66 and the spray rod 67 are driven to move, spray nozzles are arranged at spray nozzles uniformly arranged on the front side surface of the spray rod 67, so that the fire source below the mounting plate 1 starts to spray water to extinguish fire in the forward movement of the spray rod 67;
and (3) an air injection structure 7: the air injection structure 7 comprises a second rotating shaft 71, a first helical gear 72, a second helical gear 73 and a second screw 74, the right end of the front side face of the fixed plate 3 is rotatably connected with the second rotating shaft 71 through a bearing, the second rotating shaft 71 is in belt transmission with the first rotating shaft 62 through the conveyor belt 12, the first helical gear 72 is arranged at the front end of the second rotating shaft 71, the second screw 74 is rotatably connected with the right end of the lower surface of the mounting plate 1 through a bearing, the second helical gear 73 is arranged at the top end of the second screw 74, the second helical gear 73 is in meshed connection with the first helical gear 72, the air injection structure 7 further comprises a second moving block 75, an L-shaped rod 76, an air injection disc 77 and a sliding chute 78, the screw rod II 74 is in threaded connection with a moving block II 75, the right side face of the moving block II 75 is provided with an L-shaped rod 76, the right end of the front side face of the fixing plate 3 is provided with a vertical sliding groove 78, the longitudinal rod body of the L-shaped rod 76 is in sliding connection with the sliding groove 78, the front side face of the moving block II 75 is provided with an air injection disk 77, an air outlet of the air pump 11 is connected with an air inlet on the rear side face of the air injection disk 77 through an air pipe 10, the front side face of the air injection disk 77 is provided with uniformly distributed air outlet holes, the rotating shaft II 71 and the rotating shaft I62 are in belt transmission through a conveyor belt 12, the rotating shaft I62 is driven to simultaneously rotate by the rotating shaft II 71, so that the helical gear I72 is driven to rotate, and the helical gear I72 is driven to rotate by the rotating of the helical gear I72, and the helical gear II, an L-shaped rod 76 is arranged on the right side surface of the second moving block 75, a longitudinal rod body of the L-shaped rod 76 is in sliding connection with the sliding groove 78, so that the second moving block 75 is driven to start to move downwards under the rotation of the second screw 74, the air spraying disc 77 is driven to start to move downwards, an air outlet of the air pump 11 is connected with an air inlet on the rear side surface of the air spraying disc 77 through an air conveying pipe 10, and air outlet holes which are uniformly distributed are formed in the front side surface of the air spraying disc 77, so that the fire source starts to be sprayed with flame retardant gas;
wherein: still include PLC controller 13, PLC controller 13 sets up in the leading flank center department of fixed plate 3, external power source is connected to PLC controller 13's input electricity, water pump 4, air pump 11, PLC controller 13's output is all connected to the equal electricity of input of alarm lamp 14 and motor 61, PLC controller 13's input is connected to smoke detector 8's output electricity, water pump 4 provides the water source to scene's burning things which may cause a fire disaster transport, air pump 11 provides flame retardant gas to scene burning things which may cause a fire disaster, motor 61 guarantees that water source and flame retardant gas can reciprocate to spray, expand the scope of spraying, smoke content in smoke detector 8 real-time supervision air, alarm lamp 14 is used for reminding people to take place the conflagration.
When in use: the mounting plate 1 is fixedly mounted on a ceiling of an area where a fire easily occurs through a mounting hole 2 by using an external bolt, when a fire occurs, the smoke detector 8 detects that the smoke content in the air exceeds the standard, the smoke detector 8 sends an alarm signal and transmits fire information to a nearest fire station through an external network cable, and simultaneously sends a signal to the PLC 13 to control an alarm lamp 14 to start flashing acousto-optic alarm, meanwhile, the PLC 13 controls the water pump 4 and the air pump 11 to start working, a water inlet of the water pump 4 is connected with an external water source, an air inlet of the air pump 11 is connected with gas formed by mixing nitrogen, argon and carbon dioxide according to a certain proportion, meanwhile, the PLC 13 controls the motor 61 to start positive and negative rotation of a certain period, the first rotating shaft 62 is driven by the positive rotation of the motor 61 to start rotating, and the first rotating shaft 62 drives the driving gear, the driving gear 64 is meshed with the driven gear 65, so that the driven gear 65 is driven to rotate, the screw rod I63 is in threaded connection with the moving block I66, the spray rod 67 arranged at the bottom end of the moving block I66 is in sliding connection with the strip-shaped opening in the upper surface of the fixed rod I68, so that the moving block I66 and the spray rod 67 are driven to move forwards under the rotation of the screw rod I63, the water outlet of the water pump 4 is connected with the water inlet in the rear side surface of the spray rod 67 through the water pipe 5, the spray heads are arranged at the spray heads uniformly arranged at the front side surface of the spray rod 67, so that the water spraying fire extinguishing work for the fire source below the mounting plate 1 is started in the forward movement of the spray rod 67, meanwhile, the rotating shaft II 71 and the rotating shaft I62 are driven by the conveyor belt 12, the rotating shaft II, because the first bevel gear 72 is meshed with the second bevel gear 73, the second bevel gear 73 is driven to rotate under the rotation of the first bevel gear 72, and then the second screw 74 is driven to rotate, because the second screw 74 is in threaded connection with the second moving block 75, the right side surface of the second moving block 75 is provided with the L-shaped rod 76, the longitudinal rod body of the L-shaped rod 76 is in sliding connection with the chute 78, so that under the rotation of the second screw 74, the second moving block 75 is driven to move downwards, and then the air injection disk 77 is driven to move downwards, the air outlet of the air pump 11 is connected with the air inlet on the rear side surface of the air injection disk 77 through the air pipe 10, the front side surface of the air injection disk 77 is provided with uniformly distributed air outlet holes, so that the fire retardant gas is injected to the fire source, after the motor 61 runs for a certain time, the PLC 13 controls the motor 61 to start to reverse rotation, and then drives, and repeatedly spraying water and air to the fire source until the smoke detector 8 detects that the smoke content in the air is reduced to a standard value, controlling the water pump 4, the motor 61, the alarm lamp 14 and the air pump 11 to stop running by using the PLC 13, and if the fire is not controlled, further extinguishing the fire source when a fire fighter arrives at the site.
It is to be noted that the specific model of the PLC controller 13 disclosed in this embodiment is siemens S7-200, the smoke alarm 8 may be made of shenzhen co-ande science and technology limited, the smoke alarm of TAD-168, the air pump 11 may be made of shanghai yanxin trade limited, the air pump of DBMX200, the water pump 4 may be made of shanghai oriental pump industry (group) limited, the water pump of DFG, the motor 61 may be made of dongguan wibang electromechanical limited, the motor of 5IK150RGU-CF, the alarm lamp 14 may be made of hangzhou subsonic electronic limited, and the alarm lamp of LTE-1101, and the PLC controller 13 controls the smoke alarm 8, the air pump 11, the water pump 4, the alarm lamp 14 and the motor 61 to operate by a method commonly used in the prior art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a building fire alarm device which characterized in that: comprises a mounting plate (1), a sprinkling structure (6) and an air injection structure (7);
mounting plate (1): mounting holes (2) are symmetrically formed in four corners of the upper surface of the mounting plate, a vertical fixing plate (3) is arranged on the lower surface of the mounting plate (1), a water pump (4) is arranged at the left end of the front side surface of the fixing plate (3), an air pump (11) is arranged at the right end of the front side surface of the fixing plate (3), a second fixing rod (9) is arranged in the center of the lower surface of the mounting plate (1), a smoke detector (8) is arranged at the bottom end of the second fixing rod (9), and an alarm lamp (14) is arranged on the;
watering structure (6): the water pump is arranged at the left end of the front side surface of the fixed plate (3), and an output port of the water pump (4) is connected with a water inlet of the rear side surface of the sprinkling structure (6) through a water delivery pipe (5);
gas injection structure (7): the air pump is respectively arranged at the right end of the front side surface of the fixed plate (3) and the right end of the lower surface of the mounting plate (1), an air outlet of the air pump (11) is connected with an air inlet at the rear side surface of the air injection structure (7) through an air conveying pipe (10), and the air injection structure (7) is in transmission connection with the water spraying structure (6) through a conveying belt (12);
wherein: still include PLC controller (13), PLC controller (13) set up in the leading flank center department of fixed plate (3), and external power source is connected to the input electricity of PLC controller (13), and the output of PLC controller (13) is all connected to the input electricity of water pump (4), alarm lamp (14) and air pump (11), and the input of PLC controller (13) is connected to the output electricity of smoke detector (8).
2. A building fire alarm device as claimed in claim 1, wherein: watering structure (6) include motor (61), rotation axis (62), screw rod (63), driving gear (64) and driven gear (65), the leading flank left end of fixed plate (3) is equipped with motor (61), and the output shaft front end department of motor (61) is equipped with driving gear (64), and the leading flank left end of fixed plate (3) is rotated through the bearing and is connected with screw rod (63), and the axis body rear end of screw rod (63) is equipped with driven gear (65), and driving gear (64) are connected with driven gear (65) meshing, and the output of PLC controller (13) is connected to the input electricity of motor (61).
3. A building fire alarm device as claimed in claim 2, wherein: the water spraying structure (6) further comprises a first moving block (66), a first spray rod (67) and a first fixed rod (68), the first screw rod (63) is in threaded connection with the first moving block (66), the bottom end of the first moving block (66) is provided with the spray rod (67), the left end of the front side face of the fixed plate (3) is provided with the first longitudinal fixed rod (68), the upper surface of the first fixed rod (68) is provided with a strip-shaped opening, the spray rod (67) is in sliding connection with the strip-shaped opening of the upper surface of the first fixed rod (68), the output opening of the water pump (4) is connected with the water inlet of the rear side face of the spray rod (67) through a water conveying pipe (5), and spray nozzles are uniformly.
4. A building fire alarm device as claimed in claim 2, wherein: the air injection structure (7) comprises a second rotating shaft (71), a first helical gear (72), a second helical gear (73) and a second screw rod (74), the right end of the front side face of the fixing plate (3) is rotatably connected with the second rotating shaft (71) through a bearing, the second rotating shaft (71) is in belt transmission with the first rotating shaft (62) through the conveyor belt (12), the first helical gear (72) is arranged at the front end of the second rotating shaft (71), the second screw rod (74) is rotatably connected with the right end of the lower surface of the mounting plate (1) through a bearing, the second helical gear (73) is arranged at the top end of the shaft body of the second screw rod (74), and the second helical gear (73.
5. A building fire alarm device as claimed in claim 4, wherein: the air injection structure (7) further comprises a second moving block (75), an L-shaped rod (76), an air injection disc (77) and a sliding groove (78), the second screw rod (74) is in threaded connection with the second moving block (75), the L-shaped rod (76) is arranged on the right side face of the second moving block (75), the vertical sliding groove (78) is arranged at the right end of the front side face of the fixing plate (3), a longitudinal rod body of the L-shaped rod (76) is in sliding connection with the sliding groove (78), the air injection disc (77) is arranged on the front side face of the second moving block (75), an air outlet of the air pump (11) is connected with an air inlet of the rear side face of the air injection disc (77) through an air conveying pipe (10), and air outlet holes which.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021751794.2U CN213183010U (en) | 2020-08-20 | 2020-08-20 | Building fire alarm device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021751794.2U CN213183010U (en) | 2020-08-20 | 2020-08-20 | Building fire alarm device |
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| CN213183010U true CN213183010U (en) | 2021-05-11 |
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| CN202021751794.2U Active CN213183010U (en) | 2020-08-20 | 2020-08-20 | Building fire alarm device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117180677A (en) * | 2023-10-17 | 2023-12-08 | 河南大立科技有限责任公司 | Intelligent fire control management system based on big data of Internet of things |
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2020
- 2020-08-20 CN CN202021751794.2U patent/CN213183010U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117180677A (en) * | 2023-10-17 | 2023-12-08 | 河南大立科技有限责任公司 | Intelligent fire control management system based on big data of Internet of things |
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