Air-breathing smoke sensing device suitable for fire detection and early warning

Abstract

The invention discloses an air-breathing smoke sensing device suitable for fire detection and early warning, and relates to the technical field of fire fighting, the air-breathing smoke sensing device comprises a device box and a filter assembly, one side of the interior of the device box is slidably connected with a drawer sliding plate, the filter assembly is arranged on the surface of the drawer sliding plate, and one side of a first winding drum is provided with a shaping box. A second winding drum is arranged on the side, away from the first winding drum, of the shaping box. According to the air-breathing smoke sensing device suitable for fire detection and early warning, the service time of the device is greatly prolonged, the filter element does not need to be frequently replaced by personnel, the shutdown frequency of the device is greatly reduced, and when the folding filter element is released into the shaping box, the supporting pieces penetrate through gaps between layers of the folding filter element, so that the folding filter element is folded. The folding type filter element in the shaping box is fully unfolded to fill the inner space of the shaping box, so that airflow flows from bottom to top, the resistance of transverse movement of the airflow is greatly increased to prevent gas from overflowing, and meanwhile, the gas can be fully filtered.

Description

Technical Field

[0001] The present invention relates to the technical field of fire protection, and in particular to an aspiration type smoke sensing device suitable for fire detection and early warning. Background Art

[0002] Aspirating smoke detectors differ from conventional smoke sensors in that they actively extract air samples from the protected area through a sampling network and an aspirating pump. The sampling network is flexibly arranged based on the terrain of the protected area. The extracted air samples pass through a filter before entering the smoke detector. Smoke detectors typically use the following technologies for detection:

[0003] Light scattering method (optical detection):

[0004] There is a light source (such as laser or LED) and a photosensor inside. When there are smoke particles in the air, the light emitted by the light source is scattered by the smoke particles. The scattered light is captured by the photosensor and converted into an electrical signal. The intensity of the electrical signal is proportional to the smoke concentration.

[0005] Finally, based on the detection results, if the signal value is greater than the alarm threshold, a fire alarm signal is triggered.

[0006] Existing aspirating smoke detectors face the following challenges: To prevent smoke detectors from falsely triggering fire alarms due to dust, moisture, steam, and other substances, air samples are filtered through a filter before being injected into the smoke detector for testing. Therefore, the filter element in the filter needs to be replaced regularly. In some work areas with high dust content, the filter element needs to be replaced more frequently, resulting in frequent shutdown of the device and increasing the workload.

[0007] Therefore, in view of this, the existing structure and defects are studied and improved, and an aspirating smoke sensor suitable for fire detection and early warning is proposed. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention provides an aspiration-type smoke sensor suitable for fire detection and early warning, which solves the problems raised in the above-mentioned background technology.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: An aspiration-type smoke sensor device suitable for fire detection and early warning, comprising a device box and a filter assembly, a drawer slide being slidably connected to one side of the interior of the device box, and the filter assembly being arranged on the surface of the drawer slide, the filter assembly comprising an output motor, a first drum, a folded filter element, a shaping box, a support plate and a second drum, the outer wall of the output shaft of the output motor being sleeved with a first drum, and a folded filter element being wound on the surface of the first drum, a shaping box being provided on one side of the first drum, and support plates being provided on both sides of the inner wall of the shaping box, and a second drum being provided on the side of the shaping box away from the first drum.

[0010] Furthermore, one end of the foldable filter element passes through the shaping box and is rolled onto the surface of the second reel, and the second reel and the output shaft of the output motor are both rotatably arranged on the surface of the drawer slide through the U-shaped frame, and the output motor is plugged into the surface of the drawer slide.

[0011] Furthermore, a vent hole is provided on the surface of the drawer slide just below the shaping box, and holes are also provided on the surface of the shaping box.

[0012] Furthermore, a smoke detector is connected to the hole on the surface of the shaping box, an air injection plate is tightly attached to the lower surface of the drawer slide, and an air inlet at the bottom of the smoke detector is connected to the inside of the air injection plate through the vent and the hole.

[0013] Furthermore, an air suction pump is provided on the other side of the interior of the device box, and a solenoid valve is connected to the top of the air suction pump.

[0014] Furthermore, the top of the solenoid valve is connected to a sampling pipe network, and sampling holes are evenly opened on the bottom surface of the sampling pipe network.

[0015] Furthermore, auxiliary dust cleaning components are evenly distributed inside the sampling pipe network. The auxiliary dust cleaning components include elastic ropes and collision beads. The collision beads are fixed in the middle of the elastic ropes.

[0016] Furthermore, an air injection pipe port is provided on the outer wall of the sampling pipe network above the solenoid valve, and a pipe port cap is threadedly connected to the outer wall of the air injection pipe port.

[0017] Furthermore, an ash discharge pipe port is provided at one end of the sampling pipe network away from the solenoid valve, and a pipe port cap is also threadedly connected to the outer wall of the ash discharge pipe port.

[0018] Furthermore, the air injection pipe port can be connected to an air injection pump after the pipe port cap is removed, and the ash discharge pipe port can be connected to an ash collection bag after the pipe port cap is removed.

[0019] The present invention provides an aspirating smoke sensor suitable for fire detection and early warning, which has the following beneficial effects:

[0020] 1. The suction type smoke sensing device suitable for fire detection and early warning, the output motor is started regularly to drive the first reel to rotate, thereby reeling the folded filter element, so that the folded filter element on the second reel is driven to be released and enter the shaping box, thereby replacing the filter element part inside the shaping box, thereby greatly extending the service life of the device without the need for personnel to frequently replace the filter element, thereby greatly reducing the shutdown frequency of the device, and the folded filter element is automatically compressed in volume based on the rotational force when it is in the reeled state, and when it is released into the shaping box, the support sheet is used to pass through the gap between the folded filter element layers, so that the folded filter element inside the shaping box is fully expanded and fills its internal space, so that the airflow flows from bottom to top, greatly increasing the resistance to the lateral movement of the airflow to prevent gas overflow, and at the same time is also conducive to fully filtering the gas.

[0021] 2. This suction-type smoke sensor device suitable for fire detection and early warning, when the device is shut down due to filter replacement, injects compressed air into the sampling pipe network through the air injection pump, and the compressed air flows along the internal direction of the sampling pipe network. At this time, the air flow will drive the collision beads to frequently collide with the inner wall of the sampling pipe network based on the elastic action of the elastic rope, thereby utilizing the vibration generated by the collision to shake off the dust on the inner wall of the sampling pipe network, and sending the dust to the dust collection bag under the action of the air flow, thereby automatically and regularly completing the cleaning of the interior of the sampling pipe network to prevent the internal blockage of the sampling pipe network from affecting smoke detection and piston early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of a device box of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention;

[0023] Figure 2 This is a schematic diagram of the appearance and structure of a device box of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention;

[0024] Figure 3 This is a structural schematic diagram of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention, with the drawer slide being pulled out;

[0025] Figure 4 This is a schematic structural diagram of the bottom perspective of a drawer slide of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a disassembled molding box of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention;

[0027] Figure 6 The figure is a schematic structural diagram of the first drum and the second drum of an aspirating smoke sensor suitable for fire detection and early warning according to the present invention.

[0028] In the figure: 1. Device box; 2. Drawer slide; 3. Filter assembly; 301. Output motor; 302. First reel; 303. Folding filter element; 304. Forming box; 305. Support plate; 306. Second reel; 4. Smoke detector; 5. Air injection plate; 6. Air suction pump; 7. Solenoid valve; 8. Sampling pipe network; 9. Sampling hole; 10. Auxiliary cleaning assembly; 1001. Elastic rope; 1002. Collision beads; 11. Air injection pipe outlet; 12. Ash discharge pipe outlet. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] like Figures 1-6 As shown, the present invention provides a technical solution: an aspirating smoke sensor suitable for fire detection and early warning, comprising a device box 1 and a filter assembly 3, a drawer slide 2 is slidably connected to one side of the inner portion of the device box 1, the filter assembly 3 is arranged on the surface of the drawer slide 2, the filter assembly 3 comprises an output motor 301, a first reel 302, a folded filter element 303, a shaping box 304, a support piece 305 and a second reel 306, the outer wall of the output shaft of the output motor 301 is sleeved with the first reel 302, and the surface of the first reel 302 is wound with the folded filter element 303, a shaping box 304 is provided on one side of the first reel 302, and support pieces 305 are provided on both sides of the inner wall of the shaping box 304, a second reel 306 is provided on the side of the shaping box 304 away from the first reel 302, and one end of the folded filter element 303 is provided. After passing through the shaping box 304, it is wound onto the surface of the second reel 306, and the output shaft of the second reel 306 and the output motor 301 are rotatably arranged on the surface of the drawer slide 2 through the U-shaped frame, and the output motor 301 is plugged into the surface of the drawer slide 2, and a vent is provided on the surface of the drawer slide 2 just below the shaping box 304, and a hole is also provided on the surface of the shaping box 304. A smoke detector 4 is connected to the hole on the surface of the shaping box 304, and an air injection plate 5 is tightly attached to the lower surface of the drawer slide 2, and the air inlet at the bottom of the smoke detector 4 is connected to the inside of the air injection plate 5 through the vent and the hole. An air suction pump 6 is provided on the other side of the interior of the device box 1, and a solenoid valve 7 is connected to the top of the air suction pump 6, and a sampling pipe network 8 is connected to the top of the solenoid valve 7, and sampling holes 9 are evenly provided on the bottom surface of the sampling pipe network 8;

[0031] The specific operation is as follows: first, the sampling pipe network 8 is laid out in the protected area according to the designed drawings, and the solenoid valve 7 is opened. Then, the suction pump 6 is started to pump the gas in the protected area through the sampling hole 9 along the sampling pipe network 8 to the inside of the gas injection plate 5. The gas rises through the hole and enters the inside of the shaping box 304. After being filtered by the folded filter element 303 inside the shaping box 304, the gas enters the smoke detector 4 through the vent. There is a light source such as a laser or an LED and a photosensor inside the smoke detector 4. When there are smoke particles in the air, the light emitted by the light source is scattered by the smoke particles. The scattered light is captured by the photosensor and converted into an electrical signal. The intensity of the electrical signal is proportional to the smoke concentration, thereby detecting whether there is a fire hazard within the protected area.

[0032] The output motor 301 is started regularly to drive the first reel 302 to rotate, thereby reeling the folded filter element 303, so that the folded filter element 303 on the second reel 306 is driven to be released and enter the shaping box 304, thereby replacing the filter element part inside the shaping box 304, thereby greatly extending the service life of the device and eliminating the need for personnel to frequently replace the filter element, thereby greatly reducing the downtime of the device, and the folded filter element 303 is automatically compressed in volume based on the rotational force when in the reeled state, and when it is released into the shaping box 304, the support piece 305 is used to pass through the gaps between the layers of the folded filter element 303, so that the folded filter element 303 inside the shaping box 304 is fully expanded and fills its internal space, so that the airflow flows from bottom to top, greatly increasing the resistance to the lateral movement of the airflow to prevent gas overflow, and at the same time is conducive to fully filtering the gas;

[0033] Moreover, when the foldable filter element 303 is about to be consumed, the personnel can pull out the drawer slide 2 to partially extract the shaping box 304 when the device is shut down, and then replace the new reel and the new foldable filter element 303 by lifting the second reel 306 and the first reel 302, making the filter element replacement operation convenient and quick.

[0034] like Figures 1-6 As shown, auxiliary dust cleaning components 10 are evenly distributed inside the sampling pipe network 8. The auxiliary dust cleaning components 10 include an elastic rope 1001 and a collision bead 1002. The collision bead 1002 is fixed to the middle of the elastic rope 1001. An air injection nozzle 11 is provided on the outer wall of the sampling pipe network 8 above the solenoid valve 7, and the outer wall of the air injection nozzle 11 is threadedly connected to a nozzle cap. An ash discharge nozzle 12 is provided at one end of the sampling pipe network 8 away from the solenoid valve 7, and the outer wall of the ash discharge nozzle 12 is also threadedly connected to a nozzle cap. After the nozzle cap is removed, the air injection nozzle 11 can be connected to an air injection pump, and after the nozzle cap is removed, the ash discharge nozzle 12 can be connected to an ash collection bag.

[0035] The specific operation is as follows: when the device is working, the gas injection pipe port 11 and the ash discharge pipe port 12 are both connected with pipe port caps, and when the gas is extracted, the gas flow rate is difficult to drive the collision bead 1002 due to control. At this time, the collision bead 1002 remains suspended inside the sampling pipe network 8. When the device is shut down to replace the filter element, the pipe port caps can be removed, the gas injection pipe port 11 is connected to the gas injection pump, and the ash discharge pipe port 12 is connected to the ash collection bag, and the solenoid valve 7 is closed at the same time;

[0036] Compressed air is injected into the sampling pipe network 8 through an air injection pump, and the compressed air flows along the internal direction of the sampling pipe network 8. At this time, the air flow will drive the collision beads 1002 to frequently collide with the inner wall of the sampling pipe network 8 based on the elastic action of the elastic rope 1001. The vibration generated by the collision will shake off the dust on the inner wall of the sampling pipe network 8, and the dust will be sent to the dust collection bag under the action of the air flow. In this way, the interior of the sampling pipe network 8 can be cleaned regularly and automatically to prevent the internal blockage of the sampling pipe network 8 from affecting smoke detection and piston warning.

[0037] In summary, when using the suction type smoke sensor device suitable for fire detection and early warning, firstly, the sampling pipe network 8 is laid out in the protection zone according to the designed drawings, and the solenoid valve 7 is opened. Then, the suction pump 6 is started to pump the gas in the protection zone through the sampling hole 9 along the sampling pipe network 8 to the inside of the gas injection plate 5. The gas rises through the hole and enters the inside of the shaping box 304. After being filtered by the folded filter element 303 inside the shaping box 304, the gas enters the smoke detector 4 through the vent hole. There is a light source such as a laser or an LED and a photosensor inside the smoke detector 4. When there are smoke particles in the air, the light emitted by the light source is scattered by the smoke particles. The scattered light is captured by the photosensor and converted into an electrical signal. The intensity of the electrical signal is proportional to the smoke concentration, thereby detecting whether there is a fire hazard within the protection zone.

[0038] The output motor 301 is periodically started to drive the first reel 302 to rotate, thereby reeling the folded filter element 303, so that the folded filter element 303 on the second reel 306 is driven to be released and enter the shaping box 304, thereby replacing the filter element portion inside the shaping box 304. The folded filter element 303 is automatically compressed in volume due to the rotational force when in the reeled state, and when it is released into the shaping box 304, the supporting piece 305 passes through the gaps between the layers of the folded filter element 303, so that the folded filter element 303 inside the shaping box 304 is fully expanded to fill its internal space to fully filter the gas;

[0039] Moreover, when the foldable filter element 303 is about to be consumed, the operator can pull out the drawer slide 2 to partially extract the shaping box 304 when the device is stopped, and then lift the second reel 306 and the first reel 302 to replace the new reel and the new foldable filter element 303, making the filter element replacement operation convenient and quick;

[0040] When the device is working, both the gas injection pipe port 11 and the ash discharge pipe port 12 are connected with pipe port caps, and when the gas is extracted, the gas flow rate is difficult to drive the collision beads 1002 due to control. At this time, the collision beads 1002 remain suspended in the sampling pipe network 8. When the device is shut down to replace the filter element, the pipe port cap can be removed, the gas injection pump can be connected to the gas injection pipe port 11, and the ash discharge pipe port 12 can be connected to the ash collection bag. At the same time, the solenoid valve 7 is closed, and compressed air is injected into the sampling pipe network 8 through the gas injection pump. The compressed airflow flows along the internal direction of the sampling pipe network 8. At this time, the airflow will drive the collision beads 1002 to frequently collide with the inner wall of the sampling pipe network 8 based on the elastic action of the elastic rope 1001. The vibration generated by the collision will shake off the dust on the inner wall of the sampling pipe network 8, and the dust will be sent to the ash collection bag under the action of the airflow. In this way, the interior of the sampling pipe network 8 can be cleaned automatically and regularly to prevent the internal blockage of the sampling pipe network 8 from affecting smoke detection and piston warning.

[0041] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. An aspirating smoke sensor device suitable for fire detection and early warning, comprising a device box (1) and a filter assembly (3), characterized in that: A drawer slide (2) is slidably connected to one side of the interior of the device box (1); the filter assembly (3) is arranged on the surface of the drawer slide (2); the filter assembly (3) comprises an output motor (301), a first reel (302), a folded filter element (303), a shaping box (304), a support sheet (305), and a second reel (306); the first reel (302) is sleeved on the outer wall of the output shaft of the output motor (301), and the folded filter element (303) is rolled up on the surface of the first reel (302); a shaping box (304) is arranged on one side of the first reel (302), and support sheets (305) are arranged on both sides of the inner wall of the shaping box (304); and the second reel (306) is arranged on the side of the shaping box (304) away from the first reel (302).

2. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 1, characterized in that: One end of the foldable filter element (303) passes through the shaping box (304) and is rolled onto the surface of the second reel (306), and the second reel (306) and the output shaft of the output motor (301) are both rotatably arranged on the surface of the drawer slide (2) through a U-shaped frame, and the output motor (301) is plugged into the surface of the drawer slide (2).

3. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 1, characterized in that: A vent hole is provided on the surface of the drawer slide (2) just below the shaping box (304), and a hole is also provided on the surface of the shaping box (304).

4. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 3, characterized in that: A smoke detector (4) is connected to the surface of the shaping box (304) at the hole position, an air injection plate (5) is tightly attached to the lower surface of the drawer slide (2), and an air inlet at the bottom of the smoke detector (4) is connected to the interior of the air injection plate (5) through the vent hole and the hole position.

5. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 4, characterized in that: An air suction pump (6) is provided on the other side of the interior of the device box (1), and a solenoid valve (7) is connected to the top of the air suction pump (6).

6. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 5, characterized in that: The top of the solenoid valve (7) is connected to a sampling pipe network (8), and sampling holes (9) are evenly opened on the bottom surface of the sampling pipe network (8).

7. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 6, characterized in that: Auxiliary dust cleaning components (10) are evenly distributed inside the sampling pipe network (8), and the auxiliary dust cleaning components (10) include elastic ropes (1001) and collision beads (1002). The collision beads (1002) are fixed in the middle of the elastic ropes (1001).

8. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 6, characterized in that: An air injection pipe port (11) is provided on the outer wall of the sampling pipe network (8) above the solenoid valve (7), and a pipe port cap is threadedly connected to the outer wall of the air injection pipe port (11).

9. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 8, characterized in that: An ash discharge pipe opening (12) is provided at one end of the sampling pipe network (8) away from the electromagnetic valve (7), and an outer wall of the ash discharge pipe opening (12) is also threadedly connected with a pipe opening cap.

10. The aspirating smoke sensor device suitable for fire detection and early warning according to claim 9, characterized in that: The air injection pipe opening (11) can be connected to an air injection pump after the pipe opening cap is removed, and the ash discharge pipe opening (12) can be connected to an ash collection bag after the pipe opening cap is removed.

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