Electrical fire alarm device for buildings

Abstract

The invention relates to an electrical fire alarm device for buildings applied to the field of fire alarm. The upward movement of a piston plate is used to achieve a suction effect, so that external gas is transferred to a detection frame for detection, and then an electrostatic plate is used to absorb dust and smoke particles entering the detection frame. Then, a gear is used to drive a first rack and a second rack to move toward each other, so that the dust and smoke particles absorbed on the surface of the electrostatic plate are scraped and cleaned, and the top of the dust collecting block is squeezed when a wedge block approaches, so that the magnetic plate moves upward to expose a through groove and the dust pushed by the opposite block when the opposite block approaches is collected and collected in the dust collecting block. Thereafter, the dust collecting block is closed by the autonomous falling of the magnetic plate, and then the gas in the detection frame is partially discharged by the descending of the piston plate, and the dust and smoke particles in the dust collecting block are discharged by the airflow during the discharge.

Description

Technical Field

[0001] The invention relates to a fire alarm device, in particular to an electrical fire alarm device for buildings applied in the field of fire alarm. Background Art

[0002] The electrical fire alarm device of a building is an indispensable safety facility in modern buildings. It can quickly detect fire and sound an alarm at the early stage of a fire, thereby minimizing casualties and property losses. By monitoring parameters such as smoke, temperature or flame in the environment, once an abnormality is detected, the signal is immediately transmitted to the fire alarm controller. After receiving the signal, the fire alarm controller will drive the sound and light alarm to sound an alarm, and may also activate the automatic fire extinguishing system or other emergency evacuation measures.

[0003] The specification of Chinese invention patent CN202410437542.9 discloses an emergency fire warning device. After the alarm is used for a long time, the dust wrapped around the outside of the alarm sensor can be cleaned to prevent the dust from covering the alarm sensor, thereby restoring the sensitivity of the sensor. In the event of a fire, the alarm sensor can detect smoke more accurately, thereby improving the response speed of the fire alarm.

[0004] When working, the existing fire warning device uses a motor to drive the brush rod covered on the surface of the alarm to clean the dust on the surface of the alarm, thereby ensuring the smooth entry of smoke into the alarm and the reliability of the detection results. However, in the actual detection process, the smoke and dust entering the alarm cannot be effectively cleaned, which will cause the accumulation of smoke and dust on the front and rear wheels, resulting in a reduction in the reliability of the detection results. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a smoke and dust cleaning system for the fire alarm of a building after detection, so as to ensure the reliability of the detection results between multiple rounds of detection.

[0006] In order to solve the above problems, the present invention provides an electrical fire alarm device for a building, comprising an outer shell body provided with a heat dissipation port, a detection frame with an opening designed at the top is installed through the bottom wall of the outer shell body, an air inlet located below the outer shell body is provided on one side surface of the detection frame, a piston plate with a cross-sectional area the same as that of the inner wall of the detection frame is slidably connected to the inner wall of the detection frame, a dual-axis drive motor located above the detection frame is installed inside the outer shell body, one of the output ends of the dual-axis drive motor is connected to a round rod slidably penetrating the inside of the piston plate, and the bottom end of the round rod is connected to a piston plate located above the piston plate. The gear under the plate, the surface of the gear is meshedly connected with a No. 1 rack and a No. 2 rack, the maximum movement displacement of the No. 1 rack and the No. 2 rack is not greater than half of the cross-sectional width of the adsorption plate, the bottoms of the No. 1 rack and the No. 2 rack away from the gear are respectively connected with a dust collecting block and a counter block, wherein the top of the dust collecting block is connected to the bottom of the No. 1 rack through an elastic block, an adsorption plate is installed on the inner bottom wall of the detection frame, and the adsorption plate includes two electrostatic plates of the same area, an elastic plate is installed at the bottom of the electrostatic plate located on the bottom surface of the dust collecting block, and a fixed plate is installed at the bottom of the other electrostatic plate;

[0007] The other output end of the dual-axis drive motor is connected to a lead screw, a movable sleeve is sleeved on the surface of the lead screw, a connecting rod is installed on the surface of the movable sleeve, the bottom of the connecting rod is connected to the top surface of the piston plate, and a detection sensor is installed on the top of the piston plate.

[0008] In the above-mentioned electrical fire alarm device for a building, the dust entering the detection frame can be sealed and collected by utilizing the cooperation of the object block, the dust collecting block, the elastic plate and the electrostatic plate, so that the dust in the detection frame can be cleaned between two rounds of detection, thereby ensuring the accuracy and reliability of the detection results.

[0009] As a further improvement of the present application, a magnetic wedge block is installed on the top of the side surface of the opposing block close to the dust collecting block, and the bottom of the wedge block close to one end of the dust collecting block is flush with the top of the dust collecting block, and the cross-sectional height of the wedge block gradually increases from the dust collecting block to the opposing block.

[0010] As a further improvement of the present application, a through groove and a slide groove whose cross-sectional thickness is smaller than the cross-sectional thickness of the through groove are provided on one side surface of the dust collecting block close to the opposing block, and a magnetic moving plate which attracts the wedge block is slidably connected inside the slide groove.

[0011] As a further improvement of the present application, the cross-sectional height value of the magnetic plate is greater than the cross-sectional height value of the through groove, and the magnetic attraction force between the magnetic plate and the wedge block is greater than the gravity of the magnetic plate, and the surfaces of the dust collecting block, the magnetic plate, the wedge block and the opposing block that are close to each other are coated with an anti-stick coating.

[0012] As a further improvement of the present application, an air guide hose and an air outlet hose whose tail end extends to the outside of the detection frame are connected through the surface of the dust collecting block, and one end of the air guide hose is connected through the interior of the detection frame, a waterproof and breathable plate is installed inside the end where the air guide hose is connected to the detection frame, and electronic valves are installed inside the air guide hose and the air inlet.

[0013] As a further improvement of the present application, it also includes a detection feedback system, which is installed on a processor on the top wall of the outer shell, and the processor is connected to a control execution module and an alarm module, wherein the control execution module is connected to the dual-axis drive motor and the electronic valve signal to control the lifting and lowering of the piston plate and the forward and reverse rotation of the gear, and the alarm module is connected to the alarm signal installed on the top of the outer shell.

[0014] As a further improvement of the present application, the maximum displacement value of the threaded area on the surface of the screw is not greater than the vertical distance value between the top port of the detection frame and the No. 1 rack, and the length value of the round rod is greater than the length value of the screw.

[0015] As another improvement of the present application, an external frame located on one side of the detection frame is installed at the bottom of the outer shell, and a breathable ring made of breathable material located outside the detection frame is installed inside the outer shell, and the external frame and the breathable ring are connected by a connecting pipe of a built-in breathable plate and a one-way valve, and the tail end of the air outlet hose is connected to the external frame.

[0016] In summary, the upward movement of the piston plate is used to perform a suction effect, thereby transferring the external gas to the detection frame for detection, and then the electrostatic plate is used to absorb the dust and smoke particles entering the detection frame, and then the gear is used to drive the No. 1 rack and the No. 2 rack to move toward each other, so as to scrape and clean the dust and smoke particles absorbed on the surface of the electrostatic plate, and by squeezing the top of the dust collecting block when the wedge block approaches, the magnetic plate moves upward to expose the through groove and collects the dust pushed by the opposing block when the opposite block approaches into the interior of the dust collecting block, and then the magnetic plate is used to fall autonomously to realize the sealing of the dust collecting block, and then the piston plate is used to descend to partially discharge the gas in the detection frame, and the dust and smoke particles in the dust collecting block are discharged by the airflow during discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall appearance structure of the first implementation method of the present application;

[0018] Figure 2 This is a diagram showing the internal structure of the outer shell of the first embodiment of the present application;

[0019] Figure 3 This is a diagram showing the internal structure of the detection frame according to the first embodiment of the present application;

[0020] Figure 4 For this application Figure 3 A is an enlarged schematic diagram;

[0021] Figure 5 This is a schematic diagram of the composition of the adsorption plate of the first embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of the installation of the elastic block and the wedge block of the first embodiment of the present application;

[0023] Figure 7 This is a schematic diagram of the installation of the dust collecting block and the magnetic moving plate of the first embodiment of the present application;

[0024] Figure 8 This is a schematic diagram of the process of the dust collecting block and the opposing block approaching each other in the first embodiment of the present application;

[0025] Fig. 9 This is a state diagram of the dust collecting block and the opposing block in the first embodiment of the present application being close to the wedge-shaped block to squeeze the dust collecting block to move downward;

[0026] Fig.10 This is an installation diagram of an external frame and a vent ring according to a second embodiment of the present application;

[0027] Fig.11 This is a state diagram of the gas release of the breathable ring according to the second embodiment of the present application.

[0028] Description of the numbers in the figure:

[0029] 1. Outer shell; 2. Detection frame; 3. Air inlet; 4. Air outlet hose; 5. Dust collecting block; 51. Elastic block; 6. Opposite block; 7. Adsorption plate; 71. Electrostatic plate; 72. Elastic plate; 73. Fixed plate; 8. Lead screw; 9. Dual-axis drive motor; 10. Piston plate; 11. Gear; 12. Rack No. 1; 13. Rack No. 2; 14. Air guide hose; 15. Magnetic plate; 16. External frame; 17. Breathing ring. DETAILED DESCRIPTION

[0030] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0031] The first implementation method:

[0032] Figure 1-5The invention shows an electrical fire alarm device for a building, comprising an outer shell 1 with a heat dissipation port therein, a detection frame 2 with an opening at the top being installed through the bottom wall of the outer shell 1, an air inlet 3 located below the outer shell 1 is provided on one side surface of the detection frame 2, a piston plate 10 with a cross-sectional area equal to that of the inner wall of the detection frame 2 is slidably connected to the inner wall of the detection frame 2, a double-axis drive motor 9 located above the detection frame 2 is installed inside the outer shell 1, one of the output ends of the double-axis drive motor 9 is connected to a round rod slidably penetrating the inside of the piston plate 10, the bottom end of the round rod is connected to a gear 11 located below the piston plate 10, and the surface of the gear 11 is meshed with a gear. A rack 12 and a rack 13 are connected together, and the maximum movement displacement of the rack 12 and the rack 13 is not greater than half of the cross-sectional width of the adsorption plate 7. The bottoms of the ends of the racks 12 and 13 away from the gear 11 are respectively connected with a dust collecting block 5 and a counter block 6, wherein the top of the dust collecting block 5 is connected to the bottom of the rack 12 through an elastic block 51. An adsorption plate 7 is installed on the inner bottom wall of the detection frame 2, and the adsorption plate 7 includes two electrostatic plates 71 with the same area. An elastic plate 72 is installed at the bottom of the electrostatic plate 71 located on the bottom surface of the dust collecting block 5, and a fixed plate 73 is installed at the bottom of the other electrostatic plate 71.

[0033] The other output end of the dual-axis drive motor 9 is connected to a lead screw 8, a movable sleeve is sleeved on the surface of the lead screw 8, and a connecting rod is installed on the surface of the movable sleeve. The bottom of the connecting rod is connected to the top surface of the piston plate 10, and a detection sensor is installed on the top of the piston plate 10;

[0034] Figure 6-7 It is shown that a through groove and a slide groove whose cross-sectional thickness is smaller than the cross-sectional thickness of the through groove are provided on one side surface of the dust collecting block 5 close to the opposing block 6, and a magnetic moving plate 15 which attracts the wedge block is slidably connected inside the slide groove.

[0035] Specifically, when conducting electrical fire detection, the output end of the dual-axis drive motor 9 connected to one end of the lead screw 8 is started to rotate the lead screw 8, thereby driving the piston plate 10 to move upward. At this time, the electronic valve in the air guide hose 14 is closed, and the electronic valve in the air inlet 3 is opened. At this time, as the piston plate 10 moves upward, a suction effect can be formed (in this state, the magnetic plate 15 maintains a closed treatment of the through groove under the action of its own weight, thereby maintaining a relatively closed environment in the detection frame 2). At this time, the external gas enters the detection frame 2 through the air inlet 3 and is detected by the detection sensor (because the detection end of the detection sensor is located at the bottom of the piston plate 10, an effective detection operation can be performed). After the piston plate 10 moves to the maximum position, the dual-axis drive motor 9 drives the lead screw 8 to stop rotating;

[0036] After the detection is completed, the electronic valve in the air inlet 3 is closed and the two electrostatic plates 71 are started to electrostatically adsorb the floating dust and smoke particles in the detection frame 2 to the surface of the electrostatic plate 71, and then the electrostatic plate 71 is closed, and then the other output end of the dual-axis drive motor 9 is started, so that the gear 11 drives the first rack 12 and the second rack 13 to move. In this process, since the bottoms of the dust collecting block 5 and the opposing block 6 are flush with the surfaces of the two electrostatic plates 71 and maintain a horizontal fit and contact state, the dust and smoke particles adsorbed on the surface of the electrostatic plate 71 can be scraped and cleaned in the process of the dust collecting block 5 and the opposing block 6 approaching each other (such as Figure 8 shown);

[0037] When the surfaces of the dust collecting block 5 and the opposing block 6 are close to each other, the wedge block will squeeze and contact the top of the dust collecting block 5, causing the dust collecting block 5 to move downward (at the same time, under the action of magnetic attraction, the magnetic plate 15 moves upward to expose the through groove). At this time, under the action of the elastic block 51 and the elastic plate 72, the bottom end of the dust collecting block 5 is located below the bottom end of the opposing block 6 (because the bottom of the electrostatic plate 71 at the bottom of the opposing block 6 is a fixed plate 73, and there is no elastic deformation space). The dust and smoke particles scraped off the surface of the electrostatic plate 71 can be pushed to the inside of the dust collecting block 5 through the through groove (such as Fig. 9 As shown in the figure, when the subsequent gear 11 rotates in the opposite direction to drive the No. 1 rack 12 and the No. 2 rack 13 to move backward, the wedge block leaves the top of the dust collecting block 5 and releases the magnetic attraction to the magnetic plate 15, so that the magnetic plate 15 falls down autonomously, and the through groove is closed to prevent the dust collected in the dust collecting block 5 from escaping;

[0038] After the dust collecting block 5 is reset, the gear 11 stops rotating, and the electronic valve in the air guide hose 14 is opened. At the same time, the dual-axis drive motor 9 drives the lead screw 8 to continue rotating, so that the piston plate 10 moves downward, forming an extrusion effect, so that part of the gas in the detection frame 2 is transferred to the interior of the dust collecting block 5 through the air guide hose 14, which has an impact effect, so that the dust collected in the dust collecting block 5 can be discharged from the interior of the detection frame 2 through the air outlet hose 4 (to avoid the discharged dust adhering to the surface of the air inlet 3, the tail end of the air outlet hose 4 can be connected to the dust collection equipment, which is not drawn in this application).

[0039] A magnetic wedge block is installed on the top of the side surface of the opposing block 6 close to the dust collecting block 5, and the bottom of the wedge block close to one end of the dust collecting block 5 is flush with the top of the dust collecting block 5, and the cross-sectional height of the wedge block from the dust collecting block 5 to the opposing block 6 gradually increases.

[0040] The cross-sectional height of the magnetic plate 15 is greater than the cross-sectional height of the through groove, and the magnetic attraction force between the magnetic plate 15 and the wedge block is greater than the gravity of the magnetic plate 15, and the surfaces of the dust collecting block 5, the magnetic plate 15, the wedge block and the opposing block 6 that are close to each other are coated with an anti-stick coating.

[0041] Specifically, the anti-stick coating is provided to prevent dust and smoke particles from adhering to the surfaces of the dust collecting block 5, the magnetic plate 15, the opposing block 6 and the wedge block, so as to facilitate the subsequent centralized scraping and pushing away of dust and smoke particles adsorbed on the surface of the electrostatic plate 71.

[0042] The surface of the dust collecting block 5 is penetrated by an air guide hose 14 and an air outlet hose 4 whose tail end extends to the outside of the detection frame 2, and one end of the air guide hose 14 is penetrated and connected to the inside of the detection frame 2, and a waterproof and breathable plate is installed inside the end where the air guide hose 14 is connected to the detection frame 2, and electronic valves are installed inside the air guide hose 14 and the air inlet 3.

[0043] It also includes a detection feedback system, which is installed on a processor on the top wall of the outer shell 1. The processor is connected to a control execution module and an alarm module. The control execution module is connected to the dual-axis drive motor 9 and the electronic valve signal to control the lifting and lowering of the piston plate 10 and the forward and reverse rotation of the gear 11. The alarm module is connected to the alarm signal installed on the top of the outer shell 1.

[0044] Specifically, the control execution module controls the rotation of the two output ends of the dual-axis drive motor 9, thereby controlling the lifting and lowering of the piston plate 10 and the approach and distance of the dust collecting block 5 and the opposing block 6, and by controlling the opening and closing states of the two electronic valves, thereby ensuring the smooth progress of the suction detection and exhaust cleaning process.

[0045] The maximum displacement value of the threaded area on the surface of the screw 8 is not greater than the vertical distance value between the top port of the detection frame 2 and the first rack 12, and the length value of the round rod is greater than the length value of the screw 8.

[0046] Specifically, the maximum value of the unidirectional movement displacement of the moving sleeve on the surface of the screw 8, that is, the maximum value of the lifting movement displacement of the piston plate 10, does not exceed the vertical distance value between the port of the detection frame 2 and the No. 1 rack 12. Therefore, during the lifting and suction process of the piston plate 10, the piston plate 10 will not move to the top of the detection frame 2, and the stable sliding sleeve connection relationship between the round rod and the piston plate 10 is guaranteed.

[0047] The second implementation method:

[0048] Fig.10 It is shown that an external frame 16 located on one side of the detection frame 2 is installed at the bottom of the outer shell 1, and a breathable ring 17 made of breathable material located on the outside of the detection frame 2 is installed inside the outer shell 1, and the external frame 16 and the breathable ring 17 are connected by a connecting pipe of a built-in breathable plate and a one-way valve, and the tail end of the air outlet hose 4 is connected to the external frame 16 through.

[0049] Different from the first embodiment, this embodiment reutilizes the gas in the detection frame 2 discharged by the air outlet hose 4 in the first embodiment, so as to clean the dust adhering to the surface of the outer shell 1 and perform air cooling on the interior of the outer shell 1 to improve energy utilization efficiency.

[0050] Specifically, after the mixture of gas discharged from the air outlet hose 4 and dust and smoke particles enters the external frame 16, the dust and smoke particles are intercepted inside (because the air permeable plate only allows gas to pass through), and then the air flow enters the air permeable ring 17. Since the air permeable ring 17 is made of air permeable material, the air flow will be released to the outside of the air permeable ring 17, so that the dust accumulated in the heat dissipation port on the surface of the outer shell 1 can be blown away, and the air flow impacts the inside of the outer shell 1, which has the effect of enhancing the heat dissipation (such as Fig.11 as shown).

[0051] In summary, the present application utilizes the upward movement of the piston plate 10 to perform a suction effect, thereby transferring the external gas to the detection frame 2 for detection, and then utilizes the electrostatic plate 71 to absorb the dust and smoke particles entering the detection frame 2, and then utilizes the gear 11 to drive the No. 1 rack 12 and the No. 2 rack 13 to move toward each other, so as to scrape and clean the dust and smoke particles adsorbed on the surface of the electrostatic plate 71, and by squeezing the top of the dust collecting block 5 when the wedge block approaches, the magnetic plate 15 moves upward to expose the through groove and collects the dust pushed by the opposing block 6 when it approaches into the interior of the dust collecting block 5, and then utilizes the autonomous falling of the magnetic plate 15 to realize the sealing treatment of the dust collecting block 5, and then utilizes the descent of the piston plate 10 to partially discharge the gas in the detection frame 2, and utilizes the airflow during discharge to discharge the dust and smoke particles in the dust collecting block 5.

[0052] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An electrical fire alarm device for a building, comprising an outer housing (1) with a heat dissipation port provided therein, characterized in that: A detection frame (2) with an open top is installed through the bottom wall of the outer shell (1); an air inlet (3) located below the outer shell (1) is provided on one side surface of the detection frame (2); a piston plate (10) having a cross-sectional area equal to that of the inner wall of the detection frame (2) is slidably connected to the inner wall of the detection frame (2); a dual-axis drive motor (9) located above the detection frame (2) is installed inside the outer shell (1); one of the output ends of the dual-axis drive motor (9) is connected to a round rod that slides through the inside of the piston plate (10); the bottom end of the round rod is connected to a gear (11) located below the piston plate (10); a first rack (12) and a second rack are meshingly connected on the surface of the gear (11). The first rack (13) and the second rack (13) have a maximum movement displacement that is not greater than half of the cross-sectional width of the adsorption plate (7); the bottoms of the ends of the first rack (12) and the second rack (13) that are away from the gear (11) are respectively connected to a dust collecting block (5) and a counter block (6); the top of the dust collecting block (5) is connected to the bottom of the first rack (12) via an elastic block (51); the inner bottom wall of the detection frame (2) is provided with an adsorption plate (7), and the adsorption plate (7) comprises two electrostatic plates (71) of the same area; the bottom of the electrostatic plate (71) located on the bottom surface of the dust collecting block (5) is provided with an elastic plate (72); and the bottom of the other electrostatic plate (71) is provided with a fixed plate (73); The other output end of the dual-axis drive motor (9) is connected to a lead screw (8), a movable sleeve is sleeved on the surface of the lead screw (8), a connecting rod is mounted on the surface of the movable sleeve, the bottom of the connecting rod is connected to the top surface of the piston plate (10), and a detection sensor is mounted on the top of the piston plate (10); A magnetic wedge block is installed at the top of a surface of one side of the opposing block (6) close to the dust collecting block (5), and the bottom of the wedge block close to one end of the dust collecting block (5) is flush with the top of the dust collecting block (5), and the cross-sectional height of the wedge block in the direction from the dust collecting block (5) to the opposing block (6) gradually increases; A through groove and a slide groove having a cross-sectional thickness smaller than that of the through groove are provided on a surface of one side of the dust collecting block (5) close to the opposing block (6), and a magnetic moving plate (15) that attracts the wedge block is slidably connected inside the slide groove.

2. An electrical fire alarm device for a building according to claim 1, characterized in that: The cross-sectional height of the magnetic moving plate (15) is greater than the cross-sectional height of the through groove, and the magnetic attraction force between the magnetic moving plate (15) and the wedge block is greater than the gravity of the magnetic moving plate (15), and the surfaces of the dust collecting block (5), the magnetic moving plate (15), the wedge block and the opposing block (6) that are close to each other are coated with an anti-stick coating.

3. An electrical fire alarm device for a building according to claim 1, characterized in that: The surface of the dust collecting block (5) is connected through an air guide hose (14) and an air outlet hose (4) whose tail end extends to the outside of the detection frame (2), and one end of the air guide hose (14) is connected through the inside of the detection frame (2). A waterproof and breathable plate is installed inside the end where the air guide hose (14) is connected to the detection frame (2), and electronic valves are installed inside the air guide hose (14) and the air inlet (3).

4. An electrical fire alarm device for a building according to claim 3, characterized in that: The invention also comprises a detection feedback system, wherein the detection feedback system is mounted on a processor on the inner top wall of the outer shell (1), and the processor is connected to a control execution module and an alarm module, wherein the control execution module is connected to the dual-axis drive motor (9) and the electronic valve signal, and is used to control the lifting and lowering of the piston plate (10) and the forward and reverse rotation of the gear (11), and the alarm module is connected to the alarm signal mounted on the top of the outer shell (1).

5. An electrical fire alarm device for a building according to claim 1, characterized in that: The maximum displacement value of the threaded area on the surface of the lead screw (8) is no greater than the vertical distance value between the top port of the detection frame (2) and the first rack (12), and the length value of the round rod is greater than the length value of the lead screw (8).

6. An electrical fire alarm device for a building according to claim 3, characterized in that: An external frame (16) located on one side of the detection frame (2) is installed at the bottom of the outer shell (1), and a breathable ring (17) made of breathable material located outside the detection frame (2) is installed inside the outer shell (1), and the external frame (16) and the breathable ring (17) are connected via a connecting pipe with a built-in breathable plate and a one-way valve, and the tail end of the air outlet hose (4) is connected to the external frame (16).

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