Intelligent fire damper and control method thereof

Abstract

The present application relates to the technical field of fire damper, especially to an intelligent fire damper and a control method thereof, comprising: a fire damper body, a blade and a rotating shaft, a plurality of rows of blades are arranged in the fire damper body along the direction of the passage, and each row is provided with a plurality of blades; the middle part of the blade penetrates and is fixedly connected with the rotating shaft, one end of the rotating shaft is rotatably installed on the left inner wall of the passage of the fire damper body, and the other end penetrates and is rotatably connected with the right side wall of the fire damper body; all the rotating shafts are driven to rotate synchronously and in the same direction through a multi-shaft connecting rod linkage mechanism; then, the plurality of blades in each row are driven to open and close synchronously; in the fully open state, the plurality of blades in each row are parallel to the direction of the passage in the fire damper body; in the fully closed state, the plurality of blades in each row are vertically aligned in turn, closely adhere to and completely block the passage in the fire damper body, and the present application provides an intelligent fire damper and a control method thereof which can adapt to large cross-section air ducts and ensure synchronous precision.

Description

Technical Field

[0001] This invention relates to the field of fire damper technology, and in particular to an intelligent fire damper and its control method. Background Technology

[0002] Existing fire dampers are typically installed in ventilation or smoke exhaust ducts. When a fire occurs or the smoke temperature reaches a set value, the valve automatically closes to prevent the spread of fire and smoke. Patent CN222543128U discloses a fire damper with electrically assisted reset. This fire damper includes a main body, an actuator, and an auxiliary controller. By incorporating a reset motor and a blade reset lever, it achieves electrically assisted reset after the fire ends, reducing the burden of manual reset.

[0003] While the above technologies have certain advantages in assisted reset, they still have the following shortcomings in engineering applications: 1. The number of blades and shafts is limited, making it difficult to adapt to large-section air ducts; 2. Chain drives are prone to loosening, resulting in insufficient long-term synchronization accuracy; 3. Limit detection methods are simple and cannot accurately control the opening; 4. There is a lack of intelligent fault diagnosis and automatic reset functions; 5. The ability to link with modern fire protection / building control systems is limited. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent fire damper and its control method to solve the technical problems existing in the background art.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: An intelligent fire damper includes: a fire damper body, blades, and a rotating shaft. The fire damper body is a square tube structure. Several rows of blades are arranged inside the fire damper body along its channel direction, with several blades in each row. The rotating shaft is horizontally connected and fixedly connected to the middle of each blade. One end of the rotating shaft is rotatably mounted on the inner left side of the fire damper body channel, and the other end is connected and rotatably connected to the right side of the fire damper body. A multi-axis linkage mechanism is provided on the outer right side of the fire damper body. The multi-axis linkage mechanism drives all rotating shafts to rotate synchronously in the same direction, thereby driving several blades in each row to open and close synchronously. In the fully open state, several blades in each row are parallel to the internal channel direction of the fire damper body. In the fully closed state, several blades in each row are vertically aligned and tightly abut against and completely block the internal channel of the fire damper body.

[0006] Furthermore, the blade has a rectangular transverse cross-section and a non-rectangular parallelogram longitudinal cross-section; when several blades in each row are fully closed, the lower inclined surface of the upper blade is aligned and in close contact with the upper inclined surface of the lower blade in two adjacent blades.

[0007] Furthermore, it also includes: wedges, wherein the wedges are arranged in several rows, with two wedges in each row; the several rows of wedges are arranged one-to-one with the several rows of blades; the two wedges in each row are arranged symmetrically at the center and are respectively fixedly connected to the top wall and bottom wall of the internal channel of the fire damper body; when the several blades in each row are fully closed, the upper inclined surface of the uppermost blade is aligned and tightly attached to the inclined surface of the corresponding wedge located on the top wall of the internal channel of the fire damper body, and the lower inclined surface of the lowermost blade is aligned and tightly attached to the inclined surface of the corresponding wedge located on the bottom wall of the internal channel of the fire damper body.

[0008] Furthermore, it also includes: bearings and bearing housings, with two bearings and bearing housings provided for each rotating shaft. One end of the rotating shaft is rotatably mounted on one bearing housing via one of the bearings, and the bearing housing is fixedly mounted on the left side wall of the internal channel of the fire damper body; the other side of the rotating shaft is rotatably mounted on another bearing housing via another bearing, and the bearing housing is fixedly mounted on the right outer wall of the fire damper body.

[0009] Furthermore, the multi-axis linkage mechanism includes: a first connecting rod, a first connecting shaft, a second connecting rod, and a third connecting rod. Each of the first connecting rod, the first connecting shaft, and the second connecting rod is arranged in several rows, wherein the number of first connecting rods and the first connecting shaft in each row is the same as the number of rotating shafts in each row. One second connecting rod is vertically arranged in each row. One end of each of the several first connecting rods in each row is fixedly connected to the right end of each of the several rotating shafts in that row, and the other end of each of the several first connecting rods in each row is rotatably connected to the second connecting rod through several first connecting shafts. Several third connecting rods are arranged, each parallel to the internal channel direction of the fire damper body. Each third connecting rod is fixedly connected to several rows of second connecting rods, and a drive mechanism is connected to the middle of one of the third connecting rods.

[0010] Furthermore, the multi-axis linkage mechanism also includes a connecting column, through which the third link is fixedly connected to the second link.

[0011] Furthermore, the drive mechanism includes: a second connecting shaft, a fisheye spherical bearing, an electric telescopic rod, a tail connector, and a third connecting shaft. The second connecting shaft is fixedly connected to the middle of the left end of one of the third connecting rods. The telescopic end of the electric telescopic rod is rotatably connected to the second connecting shaft via the fisheye spherical bearing. The fixed end of the electric telescopic rod is fixedly connected to the tail connector. The third connecting shaft is fixedly installed on the outer right side of the fire damper body, and the tail connector is rotatably connected to the third connecting shaft.

[0012] Furthermore, it also includes: a chassis shell, a circuit board, a limit sensor, a control unit, a backup power supply, and a communication module. The chassis shell is fixedly installed on the right outer wall of the fire damper body and completely covers the multi-axis linkage mechanism. The circuit board is fixedly installed inside the chassis shell. The limit sensor, control unit, backup power supply, and communication module are all installed on the circuit board. The limit sensor is used to detect the real-time angle of one of the rotating shafts and transmit the detection data to the control unit. The control unit controls the extension and retraction of the electric telescopic rod. The backup power supply is used to supply power to the electric telescopic rod, limit sensor, control unit, and communication module in the event of a power outage. The communication module is electrically connected to the control unit and interacts with the external fire protection system.

[0013] Furthermore, the limit sensor is a rotary encoder or a Hall angle sensor.

[0014] A control method for an intelligent fire damper includes the following steps: Step 1: When receiving valve opening, valve closing, or reset commands from the external fire protection system, the control unit controls the extension and retraction of the electric telescopic rod according to the commands, and then drives several rows of blades to rotate synchronously through the multi-axis linkage mechanism; Step 2: The limit sensor collects the real-time angle of one of the rotating shafts and transmits the detection data to the control unit. The control unit then determines whether the current valve opening has reached the target angle range. If it has not reached the target angle range within the predetermined time, it is considered a fault. Step 3: If a fault is detected and the preset safety conditions are met, drive the electric telescopic rod to perform an automatic reset action, resetting the valve to the predetermined safe position; Step 4: Report the current location, operating status and fault information of the valve to the external fire protection system through the communication module, and receive remote reset or test commands when necessary.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention features multiple rows of blades, each with several blades, adaptable to large-section air ducts, while also enhancing fire resistance. The multi-axis linkage mechanism completely avoids easily worn or loosened components such as chains, pulleys, and gears, ensuring reliable operation and a long service life, suitable for high-temperature and dusty conditions. Limit sensors directly detect the shaft angle, which is converted into a valve opening percentage by the control unit, allowing for both fully open / fully closed states and intermediate opening adjustments, meeting the needs for precise airflow control and status visualization. A communication module connects to an external fire protection system, enabling status monitoring, remote control, self-test recording, and historical data analysis. A backup power supply ensures critical actions and status reporting even during main power outages, preventing safety hazards caused by power failures that could render valves inoperable or unknowable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a longitudinal sectional view of the present invention at the blade; Figure 3 This is a transverse longitudinal section view of the present invention at the pivot point. Figure 1 ; Figure 4 This is a schematic diagram showing the connection between the multi-axis linkage mechanism and the drive mechanism and the fire damper body in this invention; Figure 5 This is a transverse longitudinal section view of the present invention at the pivot point. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0017] The labels in the attached diagram are as follows: 1-Fire damper body, 2-Blade, 3-Shaft, 4-Bearing, 5-Bearing seat, 6-Linking rod one, 7-Connecting shaft one, 8-Linking rod two, 9-Connecting column, 10-Linking rod three, 11-Connecting shaft two, 12-Fisheye joint bearing, 13-Electric telescopic rod, 14-Tail connector, 15-Connecting shaft three, 16-Wedge block, 17-Chassis shell, 18-Circuit board, 19-Limit sensor, 20-Control unit, 21-Backup power supply, 22-Communication module. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] See Figures 1-6 As shown, an intelligent fire damper includes: a fire damper body 1, blades 2, and a rotating shaft 3. The fire damper body 1 is a square tube structure. Several rows of blades 2 are arranged inside the fire damper body 1 along its channel direction, with several blades in each row. The rotating shaft 3 is horizontally connected and fixedly connected through the middle of the blades 2. One end of the rotating shaft 3 is rotatably installed on the inner wall of the left side of the channel of the fire damper body 1, and the other end is connected through and rotatably connected to the right side wall of the fire damper body 1. A multi-axis linkage mechanism is provided on the outer right side wall of the fire damper body 1. The multi-axis linkage mechanism drives all the rotating shafts 3 to rotate synchronously in the same direction. This drives several blades 2 in each row to open and close synchronously. In the fully open state, several blades 2 in each row are parallel to the internal channel direction of the fire damper body 1. In the fully closed state, several blades 2 in each row are vertically aligned and tightly attached to completely block the internal channel of the fire damper body 1.

[0020] In this embodiment, the blade 2 has a rectangular cross-section in the transverse direction and a non-rectangular parallelogram cross-section in the longitudinal direction. When several blades 2 in each row are fully closed, the lower inclined surface of the upper blade 2 is aligned and in close contact with the upper inclined surface of the lower blade 2 in two adjacent blades 2.

[0021] The intelligent fire damper also includes: wedges 16, which are arranged in several rows, with two wedges in each row; the rows of wedges 16 correspond one-to-one with the rows of blades 2; the two wedges 16 in each row are centrally symmetrical and fixedly connected to the top and bottom walls of the internal channel of the fire damper body 1; when the blades 2 in each row are fully closed, the upper inclined surface of the uppermost blade 2 is aligned and tightly attached to the inclined surface of the corresponding wedge 16 located on the top wall of the internal channel of the fire damper body 1, and the lower inclined surface of the lowermost blade 2 is aligned and tightly attached to the inclined surface of the corresponding wedge 16 located on the bottom wall of the internal channel of the fire damper body 1; this ensures the normal opening and closing of the blades 2, and also ensures the sealing performance of the entire intelligent fire damper when the blades 2 in each row are fully closed.

[0022] In this embodiment, the intelligent fire damper further includes: a bearing 4 and a bearing seat 5. Two bearings 4 and two bearing seats 5 are provided for each rotating shaft 3. One end of the rotating shaft 3 is rotatably mounted on one of the bearing seats 5 through one of the bearings 4. The bearing seat 5 is fixedly mounted on the left side wall of the internal channel of the fire damper body 1. The other side of the rotating shaft 3 is rotatably mounted on another bearing seat 5 through another bearing 4. The bearing seat is fixedly mounted on the right outer wall of the fire damper body 1.

[0023] In this embodiment, the multi-axis linkage mechanism includes: a first link 6, a first connecting shaft 7, a second link 8, and a third link 10. The first link 6, the first connecting shaft 7, and the second link 8 are arranged in several rows. The number of first link 6 and the first connecting shaft 7 in each row is the same as the number of rotating shafts 3 in each row. One second link 8 is vertically arranged in each row. One end of each row of several first link 6 is fixedly connected to the right end of each row of several rotating shafts 3, and the other end of each row of several first link 6 is rotatably connected to the second link 8 via several first connecting shafts 7. Several third links 10 are arranged, all parallel to the internal channel direction of the fire damper body 1. Each third link 10 is fixedly connected to several rows of second links 8, and a drive mechanism is connected to the middle of one of the third links 10.

[0024] The multi-axis linkage mechanism also includes: a connecting column 9, and a connecting rod 3 10 is fixedly connected to a connecting rod 2 8 through the connecting column 9.

[0025] The multi-axis linkage mechanism enables the synchronous opening or closing of several rows of blades 2, and the operation is reliable, with a long service life, making it suitable for high-temperature and dusty working conditions.

[0026] In this embodiment, the drive mechanism includes: a second connecting shaft 11, a fisheye joint bearing 12, an electric telescopic rod 13, a tail connector 14, and a third connecting shaft 15. The second connecting shaft 11 is fixedly connected to the middle of the left end of one of the connecting rods 10. The telescopic end of the electric telescopic rod 13 is rotatably connected to the second connecting shaft 11 through the fisheye joint bearing 12. The fixed end of the electric telescopic rod 13 is fixedly connected to the tail connector 14. The third connecting shaft 15 is fixedly installed on the outer right side of the fire damper body 1, and the tail connector 14 is rotatably connected to the third connecting shaft 15.

[0027] In this embodiment, the intelligent fire damper further includes: a housing 17, a circuit board 18, a limit sensor 19, a control unit 20, a backup power supply 21, and a communication module 22. The housing 17 is fixedly installed on the right outer wall of the fire damper body 1 and completely covers the multi-axis linkage mechanism. The circuit board 18 is fixedly installed inside the housing 17. The limit sensor 19, the control unit 20, the backup power supply 21, and the communication module 22 are all installed on the circuit board 18. The limit sensor 19 is a rotary encoder or a Hall angle sensor. The limit sensor 19 is used to detect the real-time angle of one of the rotating shafts 3 and transmit the detection data to the control unit 20. The control unit 20 controls the extension and retraction of the electric telescopic rod 13. The backup power supply 21 is used to supply power to the electric telescopic rod 13, the limit sensor 19, the control unit 20, and the communication module 22 in the event of a power outage. The communication module 22 is electrically connected to the control unit 20 and interacts with the external fire protection system.

[0028] A control method for an intelligent fire damper includes the following steps: Step 1: When receiving valve opening, valve closing or reset commands from the external fire protection system, the control unit 20 controls the electric telescopic rod 13 to extend and retract according to the commands, and then drives several rows of blades 2 to rotate synchronously through the multi-axis linkage mechanism. Step 2: Limit sensor 19 collects the real-time angle of one of the rotating shafts 3 and transmits the detection data to control unit 20. Control unit 20: Determines whether the current valve opening has reached the target angle range. If it has not reached the target angle range within the predetermined time, it is determined to be a fault. Step 3: If a fault is determined to exist and the preset safety conditions are met, drive the electric telescopic rod 13 to perform an automatic reset action to reset the valve to the predetermined safe position; Step 4: Report the current location, operating status and fault information of the valve to the external fire protection system through the communication module 22, and receive remote reset or test commands when necessary.

[0029] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An intelligent fire damper, characterized in that, include: The fire damper consists of a main body (1), blades (2), and a rotating shaft (3). The main body (1) is a square tube structure. Several rows of blades (2) are arranged inside the main body (1) along its channel direction, with several blades in each row. The middle of each blade (2) is horizontally connected to the rotating shaft (3). One end of the rotating shaft (3) is rotatably installed on the inner wall of the left side of the channel of the main body (1), and the other end is connected to the right side wall of the main body (1). A multi-axis linkage mechanism is provided on the outer right side wall of the main body (1). The multi-axis linkage mechanism drives all the rotating shafts (3) to rotate synchronously in the same direction. This drives several blades (2) in each row to open and close synchronously. In the fully open state, several blades (2) in each row are parallel to the internal channel direction of the main body (1). In the fully closed state, several blades (2) in each row are vertically aligned and tightly sealed to completely block the internal channel of the main body (1).

2. The intelligent fire damper according to claim 1, characterized in that: The blade (2) has a rectangular cross section in the transverse direction and a non-rectangular parallelogram cross section in the longitudinal direction. In the fully closed state of several blades (2) in each row, the lower inclined surface of the upper blade (2) is aligned and closely attached to the upper inclined surface of the lower blade (2) in two adjacent blades (2).

3. The intelligent fire damper according to claim 2, characterized in that: Also includes: The wedge (16) is arranged in several rows, with two wedges in each row; the several rows of wedges (16) correspond one-to-one with the several rows of blades (2); the two wedges (16) in each row are arranged in a centrally symmetrical manner and are fixedly connected to the top and bottom walls of the internal channel of the fire damper body (1); when the several blades (2) in each row are fully closed, the upper inclined surface of the uppermost blade (2) is aligned and tightly attached to the inclined surface of the corresponding wedge (16) located on the top wall of the internal channel of the fire damper body (1), and the lower inclined surface of the lowermost blade (2) is aligned and tightly attached to the inclined surface of the corresponding wedge (16) located on the bottom wall of the internal channel of the fire damper body (1).

4. The intelligent fire damper according to claim 1, characterized in that: Also includes: Bearing (4) and bearing seat (5) are provided in two for each rotating shaft (3). One end of the rotating shaft (3) is rotatably mounted on one of the bearing seats (5) through one of the bearings (4). The bearing seat (5) is fixedly mounted on the left side wall of the internal passage of the fire damper body (1). The other side of the rotating shaft (3) is rotatably mounted on another bearing seat (5) through another bearing (4). The bearing seat is fixedly mounted on the right side outer wall of the fire damper body (1).

5. The intelligent fire damper according to claim 1, characterized in that: The multi-axis linkage mechanism includes: a first link (6), a first connecting shaft (7), a second link (8), and a third link (10). The first link (6), the first connecting shaft (7), and the second link (8) are arranged in several rows. The number of first link (6) and the first connecting shaft (7) in each row is the same as the number of rotating shafts (3) in each row. There is one second link (8) in each row. One end of several first link (6) in each row is fixedly connected to the right end of several rotating shafts (3) in each row. The other end of several first link (6) in each row is rotatably connected to the second link (8) through several first connecting shafts (7). There are several third links (10). The several third links (10) are arranged parallel to the internal channel direction of the fire damper body (1). The third links (10) are fixedly connected to several rows of second links (8). A drive mechanism is connected to the middle of one of the third links (10).

6. The intelligent fire damper according to claim 5, characterized in that: The multi-axis linkage mechanism further includes a connecting column (9), and the third link (10) is fixedly connected to the second link (8) through the connecting column (9).

7. The intelligent fire damper according to claim 5, characterized in that: The drive mechanism includes: a second connecting shaft (11), a fisheye joint bearing (12), an electric telescopic rod (13), a tail connector (14), and a third connecting shaft (15). The second connecting shaft (11) is fixedly connected to the middle of the left end of one of the connecting rods (10). The telescopic end of the electric telescopic rod (13) is rotatably connected to the second connecting shaft (11) through the fisheye joint bearing (12). The fixed end of the electric telescopic rod (13) is fixedly connected to the tail connector (14). The third connecting shaft (15) is fixedly installed on the outer right side of the fire damper body (1). The tail connector (14) is rotatably connected to the third connecting shaft (15).

8. The intelligent fire damper according to claim 7, characterized in that: Also includes: The enclosure (17), circuit board (18), limit sensor (19), control unit (20), backup power supply (21) and communication module (22) are fixedly installed on the right outer wall of the fire damper body (1) and completely cover the multi-axis linkage mechanism. The circuit board (18) is fixedly installed inside the enclosure (17). The limit sensor (19), control unit (20), backup power supply (21) and communication module (22) are all installed on the circuit board (18). The limit sensor (19) is used to detect the real-time angle of one of the rotating shafts (3) and transmit the detection data to the control unit (20). The control unit (20) controls the extension and retraction of the electric telescopic rod (13). The backup power supply (21) is used to supply power to the electric telescopic rod (13), limit sensor (19), control unit (20) and communication module (22) in the event of power failure. The communication module (22) is electrically connected to the control unit (20) and interacts with the external fire protection system.

9. The intelligent fire damper according to claim 8, characterized in that: The limit sensor (19) is a rotary encoder or a Hall angle sensor.

10. A control method for an intelligent fire damper as described in any one of claims 1 to 9, characterized in that: Includes the following steps: Step 1: When receiving the valve opening, valve closing or reset command issued by the external fire protection system, the control unit (20) controls the electric telescopic rod (13) to extend and retract according to the command, and then drives several rows of blades (2) to rotate synchronously through the multi-axis linkage mechanism; Step 2: The limit sensor (19) collects the real-time angle of one of the rotating shafts (3) and transmits the detection data to the control unit (20). The control unit (20) determines whether the current valve opening has reached the target angle range. If it has not reached the target angle range within the predetermined time, it is determined to be a fault. Step 3: If a fault is determined to exist and the preset safety conditions are met, drive the electric telescopic rod (13) to perform an automatic reset action to reset the valve to the predetermined safe position; Step 4: Report the current location, operating status and fault information of the valve to the external fire protection system through the communication module (22), and receive remote reset or test commands when necessary.

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