A centrifugal fire smoke exhaust fan system

Abstract

The application discloses a centrifugal fire-fighting smoke exhaust fan system, which comprises a casing, a placing space is arranged in the casing, a volute is fixedly arranged on the inner wall of the placing space, an impeller is arranged in the volute, and the impeller is rotationally connected with the inner wall of the placing space. In general cases, the centrifugal fire-fighting smoke exhaust fan system can be used as a ventilation and air exchange equipment, and the centrifugal fire-fighting smoke exhaust fan system cannot be normally started in the case of long-term non-use and emergency. The centrifugal fire-fighting smoke exhaust fan system can simultaneously and synchronously control the size of an air inlet and the path of an air outlet through a control motor, so that the centrifugal fire-fighting smoke exhaust fan system can realize maximum power smoke exhaust in the case of emergency, can reduce the load of the impeller according to requirements in general cases, and can make the air outlet bend to reduce noise. The centrifugal fire-fighting smoke exhaust fan system meets the requirement of operation for 30 min under 280 DEG C, can be used for a kitchen oil fume exhaust fan, has multiple purposes, and can convey gas below 80 DEG C.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal fan technology, specifically relating to a centrifugal fire-fighting smoke exhaust fan system. Background Technology

[0002] A smoke exhaust fan is a machine that quickly removes odors, high temperatures, and oil fumes generated during food processing in a kitchen. This machine is characterized by its excellent high-temperature resistance and high efficiency. Types of fans include centrifugal fans and axial fans. The appropriate machine should be selected based on the size of the space and the layout of the smoke exhaust hood.

[0003] Among them, fire-fighting smoke exhaust fans, taking HTF fire-fighting fans as an example, have excellent high-temperature resistance: the fan test meets the requirements of GBJ45-82 fire protection standard, and the enterprise internal control guarantee system is established that exceeds the standard. It can run continuously for more than 60 minutes under high temperature of 300℃ and can run continuously for 20 hours / cycle under 100℃ without damage. It is widely used in high-grade civil buildings, ovens, underground garages, tunnels and other occasions.

[0004] When a fire breaks out in the basement, a large amount of smoke is produced. At this time, the fire exhaust fans are activated to remove the smoke from the area where the fire occurred. In addition, the exhaust fans can also be used for air exchange in the basement during normal times.

[0005] Traditional fire exhaust fans are inconvenient to use under normal circumstances because they are noisy and consume a lot of energy, making them unsuitable for non-emergency situations. If they are only used in emergencies, they are idle most of the time, resulting in wasted resources. Furthermore, long-term disuse can lead to problems such as corrosion of transmission components. Even regular maintenance cannot completely solve this problem, and maintaining the equipment requires additional costs. Summary of the Invention

[0006] In order to solve the above-mentioned problems in the existing technology, the present invention aims to provide a centrifugal fire smoke exhaust fan system.

[0007] The technical solution adopted in this invention is as follows:

[0008] A centrifugal fire-fighting smoke exhaust fan system includes a casing with a housing space inside. A volute is fixedly mounted on the inner wall of the housing space, and an impeller is installed inside the volute. The impeller is rotatably connected to the inner wall of the housing space. One side of the casing has an opening, and one end of the volute faces the opening of the casing and cooperates with the inner wall of the housing space to form an air outlet. Two sets of sliding grooves are fixedly mounted on the inner wall of the housing space, located on both sides of the air outlet. A control screen is provided between the two sets of sliding grooves. The control screen consists of multiple control rods and multiple control straps, and the control rods corresponding to the sliding grooves are slidably connected to the control screen.

[0009] As a preferred embodiment of the present invention, a motor holder is fixedly provided at one end of the housing, a drive motor is fixedly provided on the motor holder, one end of the impeller is fixedly provided on the main shaft, the main shaft is rotatably connected to the inner wall of one side of the placement space, the main shaft passes through the housing, and the main shaft and the output shaft of the drive motor are driven by a belt.

[0010] As a preferred embodiment of the present invention, a belt cover is provided on one side of the belt, and the belt cover is fixedly connected to the housing.

[0011] As a preferred embodiment of the present invention, the impeller is provided with a collector at the end away from the main shaft, the collector is fixedly connected to the inner wall of the mounting space, the collector is rotatably connected to the end face of the impeller, and the casing is provided with a circular hole adapted to the size of the collector on the side near the collector to form an air inlet.

[0012] As a preferred embodiment of the present invention, the collector is provided with a fixed sleeve on the side away from the impeller, the fixed sleeve is fixedly connected to the housing, and a plurality of movable plates are detachably installed on the fixed sleeve, the plurality of movable plates being evenly distributed along the circumference of the fixed sleeve.

[0013] As a preferred embodiment of the present invention, it further includes a spline shaft, the spline shaft being aligned with the axis of the fixed sleeve, the spline shaft having a plurality of mounting grooves on its periphery, the plurality of mounting grooves corresponding one-to-one with the plurality of movable plates, a rotating shaft being fixedly mounted on the movable plate, the rotating shaft passing through both ends of the movable plate, one end of the rotating shaft being rotatably connected to the fixed sleeve, and the other end of the rotating shaft being detachably mounted in the mounting groove.

[0014] As a preferred embodiment of the present invention, a shaft groove is fixedly provided on the side of the mounting groove near the center of the spline shaft, the size of the shaft groove is adapted to the size of the rotating shaft, a patch rack is fixedly provided on one side of the mounting groove, and a pinion is fixedly provided on one end of the rotating shaft located in the mounting groove, the pinion meshing with the patch rack.

[0015] As a preferred embodiment of the present invention, a rotating sleeve is provided around the fixed sleeve, the rotating sleeve being rotatably connected to the housing, a support rod is fixedly provided at the end of the rotating sleeve away from the housing, a lead screw is fixedly provided on the support rod, the lead screw being threadedly connected to the spline shaft, a gear ring is fixedly provided around the rotating sleeve, a transmission gear is provided on one side of the gear ring, the transmission gear is rotatably mounted on the driven shaft, the driven shaft passes through the housing and is rotatably connected to the inner wall of the placement space; a protective cover is provided on one side of the rotating sleeve, the transmission gear is located inside the protective cover; a mounting plate is fixedly provided on one side of the inner wall of the placement space, a control motor is fixedly provided on the mounting plate, and the control motor drives the driven shaft through a driven belt.

[0016] In a preferred embodiment of the present invention, the output shaft of the control motor simultaneously drives the driven shaft and the control shaft. The output shaft of the control motor drives a control pulley via a control belt. The control pulley is fixedly mounted on the control shaft. The control shaft is rotatably connected to one inner wall of the placement space. A control gear is provided on one side of the control pulley. The control gear is fixedly connected to the control shaft. A control rack is provided on one side of the control gear. The control rack meshes with the control gear. The control rack is fixedly mounted at one end of one of the control rods. A right-angle rod is provided on one side of the control rack. The control rod and the right-angle rod corresponding to the slide groove are fixedly connected.

[0017] As a preferred embodiment of the present invention, the control rod is provided with a rod core, and a storage space is formed between the rod core and the control rod. The two ends of the control rod are connected to the control rod by torsion springs. The side of the control rod is provided with a take-up and release groove. A control webbing is provided between two adjacent control webbings. The two ends of the control webbing are respectively fixed and wound around the two rod cores. The rod core passes through the take-up and release groove.

[0018] The beneficial effects of this invention are as follows: As a centrifugal fire-fighting smoke exhaust fan system, this invention not only meets the requirements of continuous operation in high-temperature environments during emergencies, rapidly guiding and exhausting smoke, but also can be used as a ventilation and air exchange device under normal circumstances, avoiding situations where it cannot be used normally in emergencies due to long-term disuse; furthermore, it facilitates the detection of equipment faults during daily low-load use, making timely maintenance easier, and its safety performance is far superior to regular maintenance; moreover, by controlling the motor and simultaneously and synchronously controlling the size of the air inlet and the path of the air outlet, this invention can achieve maximum smoke exhaust power in emergencies, while under normal circumstances, the impeller load can be reduced as needed, and the air outlet can be bent to reduce noise; and this invention meets the requirement of operating at 280℃ for 30 minutes, and can also be used as a kitchen exhaust fan, with multiple uses, capable of transporting gases below 80℃. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is the present invention. Figure 1 A front view structural diagram;

[0022] Figure 3 This is the present invention. Figure 2 A schematic diagram of the AA-direction structure;

[0023] Figure 4 This is the present invention. Figure 1 A schematic diagram of the other direction on the axial side;

[0024] Figure 5 This is the present invention. Figure 4 A magnified structural diagram at point B;

[0025] Figure 6 This is the present invention. Figure 1 A schematic diagram of the impeller structure;

[0026] Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point C;

[0027] Figure 8 This is the present invention. Figure 1 A schematic diagram of the control webbing structure;

[0028] Figure 9 This is the present invention. Figure 8 A schematic diagram of the control rod cross-section structure;

[0029] Figure 10 This is the present invention. Figure 6 A schematic diagram of the splined shaft structure;

[0030] Figure 11 This is the present invention. Figure 10 A schematic diagram of the front structure;

[0031] Figure 12 This is the present invention. Figure 6 A schematic diagram of the movable plate structure. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] The following is combined with Figure 1-12This invention describes a centrifugal fire-fighting smoke exhaust fan system, comprising a housing 11, an installation space within the housing 11, a volute 26 fixedly mounted on the inner wall of the installation space, an impeller 27 installed within the volute 26, and the impeller 27 rotatably connected to the inner wall of the installation space; an opening on one side of the housing 11, with one outlet end of the volute 26 facing the opening side of the housing 11 and engaging with the inner wall of the installation space to form an air outlet 22; two sets of sliding grooves 25 fixedly mounted on the inner wall of the installation space, the two sets of sliding grooves 25 respectively located on both sides of the air outlet 22, and a control screen between the two sets of sliding grooves 25, the control screen consisting of multiple control rods 23 and multiple control webbing 24, the control rods 23 corresponding to the sliding grooves 25 being slidably connected to them; the control screen enables the device to have different operating states, under normal circumstances, making the path of the air outlet curved and longer, thereby reducing noise without considering ventilation efficiency.

[0035] Advantageously, a motor holder 12 is fixedly mounted on one end of the housing 11, and a drive motor 13 is fixedly mounted on the motor holder 12. One end of the impeller 27 is fixedly mounted on a main shaft, which is rotatably connected to one inner wall of the mounting space. The main shaft passes through the housing 11, and the output shaft of the main shaft and the drive motor 13 are driven by a belt 14. The drive motor 13 provides power for the rotation of the impeller 27.

[0036] Advantageously, a belt cover 15 is provided on one side of the belt 14, and the belt cover 15 is fixedly connected to the housing 11. The belt cover 15 protects the belt 14.

[0037] Advantageously, a collector 37 is provided at the end of the impeller 27 away from the main shaft. The collector 37 is fixedly connected to the inner wall of the mounting space and rotatably connected to the end face of the impeller 27. The casing 11 has a circular hole adapted to the size of the collector 37 on the side near the collector 37, forming an air inlet. The collector 37 is conical in shape to guide the gas and reduce flow losses.

[0038] Advantageously, the collector 37 is provided with a fixed sleeve 20 on the side away from the impeller 27. The fixed sleeve 20 is fixedly connected to the housing 11. Multiple movable plates 16 are detachably installed on the fixed sleeve 20, and the multiple movable plates 16 are evenly distributed around the circumference of the fixed sleeve 20. The movable plates 16 are equivalent to air valves, which can flexibly adjust the size of the air inlet, thereby changing the load on the impeller 27.

[0039] Advantageously, it also includes a splined shaft 38, whose axis coincides with that of the fixed sleeve 20. The splined shaft 38 has multiple mounting grooves 41 on its circumference, each corresponding to one of the movable plates 16. A rotating shaft 44 is fixedly mounted on each movable plate 16, passing through both ends of the movable plate 16. One end of the rotating shaft 44 is rotatably connected to the fixed sleeve 20, and the other end is detachably installed in the mounting groove 41. The splined shaft 38 simultaneously controls the rotation of multiple movable plates 16. The axial movement of the splined shaft 38 drives the movable plates 16 to rotate, resulting in high control precision and a high degree of automation.

[0040] Advantageously, a shaft groove 43 is fixedly provided on the side of the mounting groove 41 near the axis of the spline shaft 38. The size of the shaft groove 43 is adapted to the size of the rotating shaft 44. A patch rack 42 is fixedly provided on one side of the mounting groove 41. A pinion 45 is fixedly provided on one end of the rotating shaft 44 located in the mounting groove 41. The pinion 45 meshes with the patch rack 42.

[0041] Advantageously, a rotating sleeve 17 is provided around the fixed sleeve 20, the rotating sleeve 17 is rotatably connected to the housing 11, a support rod 19 is fixedly provided at the end of the rotating sleeve 17 away from the housing 11, a lead screw 39 is fixedly provided on the support rod 19, the lead screw 39 is threadedly connected to the spline shaft 38, a gear ring is fixedly provided around the rotating sleeve 17, a transmission gear is provided on one side of the gear ring, the transmission gear is rotatably mounted on the driven shaft 34, the driven shaft 34 passes through the housing 11 and is rotatably connected to the inner wall of the placement space; a protective cover 21 is provided on one side of the rotating sleeve 17, the transmission gear is located inside the protective cover 21; an mounting plate 46 is fixedly provided on one side of the inner wall of the placement space, a control motor 36 is fixedly provided on the mounting plate 46, the control motor 36 drives the driven shaft 34 through the driven belt 35.

[0042] Advantageously, the output shaft of the control motor 36 simultaneously drives the driven shaft 34 and the control shaft 32. The output shaft of the control motor 36 drives the control pulley 31 via the control belt 33. The control pulley 31 is fixedly mounted on the control shaft 32. The control shaft 32 is rotatably connected to one inner wall of the placement space. A control gear 30 is provided on one side of the control pulley 31. The control gear 30 is fixedly connected to the control shaft 32. A control rack 29 is provided on one side of the control gear 30, and the control rack 29 meshes with the control gear 30. The control rack 29 is fixedly mounted at one end of one of the control rods 23. A right-angle rod 28 is provided on one side of the control rack 29. The control rod 23 and the right-angle rod 28 corresponding to the slide groove 25 are fixedly connected. The control motor 36 simultaneously controls the path of the air outlet 22 and the size of the air inlet, adjusting them synchronously and cooperating with each other.

[0043] Advantageously, the control rod 23 has a rod core 40 inside, forming a storage space between the rod core 40 and the control rod 23. Both ends of the control rod 23 are connected to it via torsion springs. The control rod 23 has a retraction groove on its side. A control webbing 24 is provided between two adjacent control webbing 24s, with both ends fixed and wound around the two rod cores 40 respectively. The rod core 40 passes through the retraction groove. The torsion spring keeps the control webbing 24 taut at all times. The control webbing 24 is made of fire-resistant and high-temperature resistant material, such as steel wire webbing, and does not require excellent flexibility; it only needs to be able to be bent to a certain extent.

[0044] All materials in this invention are designed to operate at 280°C for 30 minutes.

[0045] Working principle of this invention:

[0046] The drive motor 13 starts and drives the main shaft to rotate via the belt 14. The main shaft drives the impeller 27 to rotate, and the rotation direction of the impeller 27 is the involute direction of the volute 26.

[0047] The airflow enters the impeller 27 from the movable plate 16 through the collector 37, passes through the volute 26, and is discharged from the outlet 22.

[0048] The present invention has two states: a normal state and an emergency state, and the switching between the two states is controlled by the control motor 36.

[0049] Under normal conditions (excluding fires and for ventilation only), the control motor 36 simultaneously drives the control belt 33 and the driven belt 35 to rotate. The control belt 33 drives the control pulley 31 (see attached diagram). Figure 5The control shaft 32 rotates counterclockwise, and the control pulley 31 rotates together. The control shaft 32 drives the control gear 30 to rotate, and the control gear 30 drives the control rack 29 to move. The control rack 29 and the right-angle rod 28 simultaneously drive the several control rods 23 connected to it to slide downwards. Under the action of the torsion spring, the control webbing 24 is always taut. The control webbing 24 forms a wave shape when viewed from the side.

[0050] When the gas flows out from the outlet 22, the path that the gas needs to take increases. At the same time, the energy carried by the gas and the friction loss of the control webbing 24 achieve the purpose of noise reduction.

[0051] At the same time, driven belt 35 drives driven shaft 34 (see attached document). Figure 5 (Counterclockwise) rotation, driven shaft 34 drives drive gear to rotate, drive gear drives gear ring 18 to rotate, and rotating sleeve 17 follows gear ring 18 (see attached). Figure 1 (Rotating clockwise) the support rod 19 rotates with the rotating sleeve 17;

[0052] Lead screw 39 follows support rod 19 (see attached reference) Figure 6 (Clockwise) rotation, spline shaft 38 is forced (see attached) Figure 7 (Move to the right) to drive the small gear 45 (see attached diagram). Figure 7 One of the small gears 45 (as indicated by the label) rotates clockwise, and the movable plate 16 rotates with the small gear 45. Multiple movable plates 16 rotate synchronously, which reduces the air inlet area and achieves the purpose of reducing the load on the impeller 27.

[0053] In an emergency (fire occurs, producing dense smoke), the control motor 36 communicates with the alarm system and rotates in the opposite direction. Referring to the working principle in normal conditions, the movable plate 16 rotates to a state perpendicular to the fixed sleeve 20 (maximum air inlet area), the control rod 23 slides to the end of the slide groove 25, multiple control webbing 24 are horizontal, and the smoke passes through the air outlet 22 through the shortest path.

[0054] In addition, this invention can also be used in kitchen exhaust fans, with multiple applications, and can transport gases below 80°C.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A centrifugal fire-fighting smoke exhaust fan system, characterized in that: The device includes a housing, within which a mounting space is provided. A volute is fixedly mounted on the inner wall of the mounting space, and an impeller is installed inside the volute. The impeller is rotatably connected to the inner wall of the mounting space. One side of the housing has an opening, and one outlet end of the volute faces the opening side of the housing, cooperating with the inner wall of the mounting space to form an air outlet. Two sets of sliding grooves are fixedly mounted on the inner wall of the mounting space, located on either side of the air outlet. A control screen is provided between the two sets of sliding grooves. The control screen consists of multiple control rods and multiple control straps, with the control rods corresponding to the sliding grooves slidably connected to the sliding grooves. The control rod has a rod core inside, and a storage space is formed between the rod core and the control rod. The side of the control rod has a storage groove. A control webbing is provided between two adjacent control rods. The two ends of the control webbing are fixed and wound around the two rod cores respectively. By setting torsion springs to keep the control webbing taut at all times, the control screen can enable the fire exhaust fan system to have different working states. By driving the control rod to slide along the slide, the control screen can have two states: the control webbing forms a wave shape when viewed from the side and multiple control webbing are horizontal. Accordingly, the gas needs to take different paths when it flows out of the outlet.

2. The centrifugal fire-fighting smoke exhaust fan system according to claim 1, characterized in that: A motor holder is fixedly mounted on one end of the housing, and a drive motor is fixedly mounted on the motor holder. One end of the impeller is fixedly mounted on the main shaft. The main shaft is rotatably connected to the inner wall of one side of the placement space. The main shaft passes through the housing, and the main shaft and the output shaft of the drive motor are driven by a belt.

3. A centrifugal fire-fighting smoke exhaust fan system according to claim 2, characterized in that: A belt cover is provided on one side of the belt, and the belt cover is fixedly connected to the housing.

4. A centrifugal fire-fighting smoke exhaust fan system according to claim 2, characterized in that: An air collector is provided at the end of the impeller away from the main shaft. The air collector is fixedly connected to the inner wall of the mounting space and rotatably connected to the end face of the impeller. A circular hole with a size adapted to the air collector is provided on the side of the housing near the air collector to form an air inlet.

5. A centrifugal fire-fighting smoke exhaust fan system according to claim 4, characterized in that: The collector is provided with a fixed sleeve on the side away from the impeller. The fixed sleeve is fixedly connected to the housing. Multiple movable plates are detachably installed on the fixed sleeve, and the multiple movable plates are evenly distributed along the circumference of the fixed sleeve.

6. A centrifugal fire-fighting smoke exhaust fan system according to claim 5, characterized in that: It also includes a spline shaft, the spline shaft being aligned with the axis of the fixed sleeve. The spline shaft has multiple mounting grooves on its periphery, each mounting groove corresponding to one of the multiple movable plates. A rotating shaft is fixedly mounted on each movable plate, the rotating shaft passing through both ends of the movable plate. One end of the rotating shaft is rotatably connected to the fixed sleeve, and the other end of the rotating shaft is detachably installed in the mounting groove.

7. A centrifugal fire-fighting smoke exhaust fan system according to claim 6, characterized in that: A shaft groove is fixedly provided on one side of the mounting groove near the center of the spline shaft. The size of the shaft groove is adapted to the size of the rotating shaft. A patch rack is fixedly provided on one side of the mounting groove. A pinion is fixedly provided on one end of the rotating shaft located in the mounting groove. The pinion meshes with the patch rack.

8. A centrifugal fire-fighting smoke exhaust fan system according to claim 7, characterized in that: The fixed sleeve has a rotating sleeve on its periphery, which is rotatably connected to the housing. A support rod is fixedly provided at the end of the rotating sleeve away from the housing. A lead screw is fixedly provided on the support rod and threadedly connected to the spline shaft. A gear ring is fixedly provided on the periphery of the rotating sleeve, and a transmission gear is provided on one side of the gear ring. An installation plate is fixedly provided on one inner wall of the placement space, and a control motor is fixedly provided on the installation plate.

9. A centrifugal fire-fighting smoke exhaust fan system according to claim 8, characterized in that: The output shaft of the control motor simultaneously drives the transmission gear and the control shaft. The output shaft of the control motor drives the control pulley via a control belt. The control pulley is fixedly mounted on the control shaft. The control shaft is rotatably connected to one inner wall of the placement space. A control gear is provided on one side of the control pulley. The control gear is fixedly connected to the control shaft. A control rack is provided on one side of the control gear. The control rack meshes with the control gear. The control rack is fixedly mounted on one end of one of the control rods. A right-angle rod is provided on one side of the control rack. The control rod and the right-angle rod corresponding to the slide groove are fixedly connected.

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