A portable duct fan with high structural flexibility

Abstract

The present invention relates to a portable duct fan with high structural flexibility, and relates to the technical field of fans, comprising a box, a pipe and a mesh cover respectively arranged at the front and rear ends of the box, and a fan assembly arranged in the box, wherein a noise-proof cylinder is arranged in the box at the air outlet of the fan assembly, and the air outlet of the noise-proof cylinder is connected to the pipe; the inner side of the mesh cover is plugged with the noise-proof cylinder, and the end of the noise-proof cylinder is provided with a stabilizing assembly for stabilizing the motor end of the fan assembly, which is pushed and locked by the mesh cover. The entire duct fan structure in the present invention is compact and portable, has good vibration resistance, and has high structural installation flexibility between the various components, which is convenient for improving the efficiency during subsequent maintenance and disassembly of the entire machine.

Description

Technical Field

[0001] The invention belongs to the technical field of fans, and in particular relates to a portable duct fan with high structural flexibility. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine and is widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household appliances, drying and selection of grains, wind tunnel wind source and inflation and propulsion of hovercraft, etc.

[0003] Duct fans are used for ventilation of various ducts. When they start working, the vibration of the bearing is very small. However, as the operation time increases, the dust in the fan will adhere to the impeller unevenly, gradually destroying the dynamic balance of the fan and increasing the vibration of the bearing. Once the vibration reaches the maximum limit allowed by the fan, the fan must be shut down for repair. The traditional duct fan has poor structural vibration resistance and the structure itself is not easy to disassemble and assemble. Later maintenance is laborious and inefficient. For this reason, we propose a portable duct fan with high structural flexibility. Summary of the invention

[0004] The purpose of the present invention is to provide a portable duct fan with simple structure, reasonable design and high structural flexibility in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A portable duct fan with high structural flexibility comprises a box body, a pipe and a mesh cover respectively arranged at the front and rear ends of the box body, and a fan assembly arranged in the box body, wherein a noise-proof cylinder is arranged at the air outlet of the fan assembly in the box body, and the air outlet of the noise-proof cylinder is connected to the pipe;

[0007] The inner side of the mesh cover is plugged into the noise-proof cylinder, and the end of the noise-proof cylinder is provided with a stabilizing component which is pushed inward and locked by the mesh cover and is used to stabilize the motor end of the fan assembly.

[0008] As a further optimization scheme of the present invention, the fan assembly includes a hood fixed to the mesh cover by a locking piece, and a drive motor is provided at one end of the hood extending into the noise-proof cylinder, and a fan blade is provided at the output shaft sleeve of the drive motor.

[0009] As a further optimization scheme of the present invention, the stabilizing assembly includes a stabilizing plate symmetrically arranged on the outside of the driving motor, a threaded sleeve arranged on the outside of the stabilizing plate, a single-head screw arranged outside the threaded sleeve and connected to the axis of the noise-proof cylinder, a gear arranged on the outer end of the single-head screw, and a rack arranged on the mesh cover and meshing with the gear for transmission, and a fixing seat for fixing the rack is provided on the outside of the mesh cover.

[0010] As a further optimization solution of the present invention, the stabilizing plate is arranged in an inwardly concave arc shape and a plurality of sound-absorbing and vibration-reducing blocks abutting against the driving motor are arranged equidistantly on the inner side wall.

[0011] As a further optimization scheme of the present invention, the locking part includes a bearing seat arranged at the center of the mesh cover and a rotating rod connected to the rotating shaft of the bearing seat. The end of the rotating rod extending into the inner side of the box body is provided with multiple locking rods, and the inner wall of the machine cover close to the mesh cover is provided with a locking block connected with the locking rod. During operation, the rotating rod is rotated to generate relative rotation between it and the bearing seat. After the multiple locking rods connected to the inner end of the rotating rod are connected with the locking block, the mesh cover and the machine cover are structurally locked. Conversely, the rotating rod can be rotated in the opposite direction to quickly disengage the locking structure of the mesh cover and the machine cover.

[0012] As a further optimization scheme of the present invention, the noise-proof tube includes a hollow tube and a sound-absorbing corrugated plate arranged in the cavity of the hollow tube, the inner wall of the hollow tube is evenly distributed with sound-absorbing holes, and the noise-proof tube serves as a channel for air flow, and adopts a sound-absorbing structure, which utilizes the sound-absorbing principle of a hollow tube with sound-absorbing holes evenly distributed on the inner wall to form a cavity resonator, and then utilizes the sound-absorbing corrugated plate to further absorb the noise generated when the driving motor is working, thereby achieving the purpose of noise reduction and silencing.

[0013] As a further optimization solution of the present invention, an equipment box and a control component are provided on the inner bottom wall of the box body, and a rear pull plate is provided at the rear end of the box body corresponding to the equipment box.

[0014] As a further optimization scheme of the present invention, handles are symmetrically provided on the outer side walls of both sides of the box body, so that the portability is further improved, and a light is provided on the top end of the box body near the connecting pipe to facilitate the installation of the connecting pipe.

[0015] The beneficial effects of the present invention are:

[0016] 1. Compared with the existing duct fans, the overall structure of the present invention is more compact and portable, and the device for stabilizing the components not only supports the structure of the entire fan component, but also provides a stable structure for driving the motor to absorb sound and isolate vibrations.

[0017] 2. During subsequent maintenance of the entire machine, the present invention only requires rapid reverse rotation of the rotating rod to disengage the locking structure between the mesh cover and the machine cover, and then the mesh cover is pulled outward to pull the stabilizing assembly to release the lock on the fan assembly. The fan assembly can then be pulled out of the passage for cleaning and maintenance, and the end of the noise-proof cylinder is then exposed for cleaning operations. The structural installation flexibility between the various components is high, which is convenient for improving the efficiency during subsequent maintenance and disassembly of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a stereogram of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 is a top view of the present invention;

[0021] Figure 4 is a rear view of the present invention;

[0022] In the figure: 1. Box body; 2. Mesh cover; 3. Pipe connection; 4. Noise-proof tube; 41. Hollow tube; 42. Sound-absorbing corrugated plate; 43. Sound-absorbing holes; 5. Stabilizing plate; 6. Threaded sleeve; 7. Single-head screw; 8. Gear; 9. Rack; 10. Machine cover; 11. Drive motor; 12. Fan blade; 13. Fixed seat; 14. Sound-absorbing and vibration-damping block; 15. Equipment box; 16. Control component; 17. Handle; 18. Rear pull plate; 19. Light; 20. Lock rod; 21. Lock block; 22. Turn rod; 23. Bearing seat. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example 1

[0025] like Figure 1-2 As shown, a portable duct fan with high structural flexibility comprises a box body 1, a pipe 3 and a mesh cover 2 respectively arranged at the front and rear ends of the box body 1, and a fan assembly arranged in the box body 1, the fan assembly is used to discharge gas and ventilate the duct, a noise-proof cylinder 4 is arranged at the air outlet of the fan assembly in the box body 1, and the air outlet of the noise-proof cylinder 4 is connected to the pipe 3, and the pipe 3 is used to install the whole device with the duct that needs ventilation;

[0026] The fan assembly includes a hood 10 fixed to the mesh cover 2 by a locking piece, and a drive motor 11 is provided at one end of the hood 10 extending into the noise prevention tube 4, and a fan blade 12 is provided on the output shaft sleeve of the drive motor 11. The locking piece integrates the hood 10 fixing the drive motor 11 with the structure of the mesh cover 2. The two structures can also be quickly disassembled by operating the locking piece, and can be flexibly combined, so that the installation structure of the whole equipment is easy to disassemble and assemble, which is beneficial to the later cleaning and maintenance operations of the equipment.

[0027] The inner side of the mesh cover 2 is plugged into the noise prevention tube 4, and the end of the noise prevention tube 4 is provided with a stabilizing component for stabilizing the motor end of the fan assembly, which is pushed and locked by the mesh cover 2. The stabilizing component includes a stabilizing plate 5 symmetrically arranged on the outside of the driving motor 11, a threaded sleeve 6 arranged on the outside of the stabilizing plate 5, a single-head screw 7 arranged outside the threaded sleeve 6 and axially connected to the noise prevention tube 4, a gear 8 arranged at the outer end of the single-head screw 7, and a rack 9 arranged on the mesh cover 2 and meshing with the gear 8 for transmission. A fixing seat 13 for fixing the rack 9 is provided on the outside of the mesh cover 2. The stabilizing plate 5 is arranged in an inwardly concave arc shape and a plurality of sound-absorbing and vibration-damping blocks 14 abutting against the driving motor 11 are equidistantly provided on the inner wall.

[0028] The component structure of the duct fan is integrated in the box body 1. When the whole machine is assembled, a channel is left at the position of the mesh cover 2 at the rear end of the box body 1. The fan assembly is first extended from the channel until the drive motor 11 in the fan assembly is placed at the gap between the two stabilizing plates 5. At this time, the machine cover 10 corresponds to and is close to the inner wall of the noise-proof cylinder 4. Subsequently, the mesh cover 2 is inserted into the corresponding channel. After the mesh cover 2 is extended into the box body 1, the inner end of the mesh cover 2 is close to the outer wall of the noise-proof cylinder 4, so that an annular channel is formed between the mesh cover 2 and the machine cover 10, and the end of the noise-proof cylinder 4 is embedded in the annular channel, which ensures that the structure of the machine cover 10 and the mesh cover 2 is relatively fixed to the structure of the noise-proof cylinder 4.

[0029] like Figure 2 As shown, the two stabilizing plates 5 are arranged opposite to each other, and the stabilizing plates 5 are arranged in an inwardly concave arc shape to well accommodate the driving motor 11. When the mesh cover 2 is inserted, the mesh cover 2 is pushed inwardly to pull the stabilizing component to complete the locking of the fan component. The specific operation is that the threaded sleeve 6 on the outside of the stabilizing plate 5 is threadedly matched with the single-head screw 7 axially connected to the noise-proof tube 4, and when the mesh cover 2 is pushed inward, the rack 9 on its inner side meshing with the gear 8 is meshed with the gear 8 at the outer end of the single-head screw 7. The gear 8 rotates a certain angle accordingly, and the single-head screw 7 connected to the gear 8 rotates to drive the threaded sleeve 6 to produce relative displacement therewith, and the threaded sleeve 6 and the stabilizing plate 5 connected thereto move inward, and the multiple sound-absorbing and vibration-reducing blocks 14 on the inner side of the stabilizing plate 5 are against the driving motor 11, which not only supports the structure of the entire fan component, but also provides a stable structure for sound absorption, vibration isolation and vibration reduction of the driving motor 11 through the arrangement of the sound-absorbing and vibration-reducing blocks 14.

[0030] Finally, the locking piece on the mesh cover 2 is operated to fix the mesh cover 2 to the structure of the machine cover 10. The locking piece includes a bearing seat 23 arranged at the center of the mesh cover 2 and a rotating rod 22 rotatably connected to the bearing seat 23. The end of the rotating rod 22 extending into the inner side of the box body 1 is provided with a plurality of locking rods 20. The inner side wall of the machine cover 10 close to the mesh cover 2 is provided with a locking block 21 plugged with the locking rod 20. During operation, the rotating rod 22 is rotated to generate relative rotation between the rotating rod 22 and the bearing seat 23. After the plurality of locking rods 20 connected to the inner end of the rotating rod 22 are plugged with the locking block 21, the mesh cover 2 and the machine cover 10 are structurally locked. On the contrary, the locking structure of the mesh cover 2 and the machine cover 10 can be quickly disengaged by rotating the rotating rod 22 in the opposite direction.

[0031] During subsequent maintenance of the whole machine, it can be seen from the above that it is only necessary to quickly rotate the rotating rod 22 in the opposite direction to disengage the locking structure of the mesh cover 2 and the machine cover 10, and then pull the mesh cover 2 outward to pull the stabilizing assembly to release the lock on the fan assembly, and the fan assembly can then be pulled out of the passage for cleaning and maintenance, and the end of the noise-proof cylinder 4 is then exposed for cleaning operation;

[0032] The entire duct fan structure is compact and portable, with good vibration resistance, and the structural installation flexibility between the various components is high, which facilitates the improvement of efficiency during the subsequent maintenance and disassembly of the entire equipment.

[0033] like Figure 3-4 As shown, the noise-proof tube 4 includes a hollow tube 41 and a sound-absorbing corrugated plate 42 arranged in the cavity of the hollow tube 41. The inner wall of the hollow tube 41 is evenly distributed with sound-absorbing holes 43. The noise-proof tube 4 serves as a channel for air flow and adopts a sound-absorbing structure. It utilizes the sound-absorbing principle of the hollow tube 41 with the sound-absorbing holes 43 evenly distributed on the inner wall to form a cavity resonator, and then utilizes the sound-absorbing corrugated plate 42 to further absorb the noise generated when the drive motor 11 is working, so as to achieve the purpose of noise reduction and silencing.

[0034] An equipment box 15 and a control assembly 16 are provided on the inner bottom wall of the box body 1. The spaces between the equipment box 15 and the control assembly 16 are clearly distinguished, which is convenient for later maintenance. A rear pull plate 18 is provided at the rear end of the box body 1 corresponding to the equipment box 15. The rear pull plate 18 can be pulled out to facilitate taking out tools in the equipment box 15. Handles 17 are symmetrically provided on the outer side walls on both sides of the box body 1 to further improve the portability. A light 19 is provided at the top end of the box body 1 close to the connecting pipe 3 to provide auxiliary lighting and facilitate the installation operation of the connecting pipe 3.

[0035] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A portable duct fan with high structural flexibility, comprising a housing (1), a pipe (3) and a mesh cover (2) respectively arranged at the front and rear ends of the housing (1), and a fan assembly arranged in the housing (1), characterized in that: A noise-proof cylinder (4) is provided at the air outlet of the fan assembly in the box body (1), and the air outlet of the noise-proof cylinder (4) is connected to the connecting pipe (3); The fan assembly comprises a hood (10) fixed to a mesh hood (2) via a locking member, and an end of the hood (10) extending into the noise-proof cylinder (4) is provided with a drive motor (11), and an output shaft sleeve of the drive motor (11) is provided with a fan blade (12); The locking member comprises a bearing seat (23) arranged at the center of the mesh cover (2) and a rotating rod (22) rotatably connected to the bearing seat (23); a plurality of locking rods (20) are arranged at one end of the rotating rod (22) extending into the inner side of the box body (1); and a locking block (21) plugged into the locking rod (20) is arranged on the inner side wall of the cover (10) close to the mesh cover (2); The inner side of the mesh cover (2) is plugged into the noise-proof cylinder (4), and the end of the noise-proof cylinder (4) is provided with a stabilizing component that is pushed inward and locked by the mesh cover (2) and is used to stabilize the motor end of the fan assembly; The stabilizing component comprises a stabilizing plate (5) symmetrically arranged on the outside of a driving motor (11), a threaded sleeve (6) arranged on the outside of the stabilizing plate (5), a single-head screw (7) arranged outside the threaded sleeve (6) and axially connected to the noise-proof cylinder (4), a gear (8) arranged at the outer end of the single-head screw (7), and a rack (9) arranged on the mesh cover (2) and meshing with the gear (8). A fixing seat (13) for fixing the rack (9) is arranged on the outside of the mesh cover (2). The stabilizing plate (5) is arranged in an inwardly concave arc shape and a plurality of sound-absorbing and vibration-reducing blocks (14) abutting against the driving motor (11) are equidistantly arranged on the inner wall.

2. A portable duct fan with high structural flexibility according to claim 1, characterized in that: The noise-proof cylinder (4) comprises a hollow cylinder (41) and a sound-absorbing corrugated plate (42) arranged in a cavity of the hollow cylinder (41); the inner side wall of the hollow cylinder (41) is evenly distributed with sound-absorbing holes (43).

3. A portable duct fan with high structural flexibility according to claim 1, characterized in that: The inner bottom wall of the box body (1) is provided with a device box (15) and a control assembly (16), and a rear pull plate (18) is provided at the rear end of the box body (1) corresponding to the device box (15).

4. A portable duct fan with high structural flexibility according to claim 1, characterized in that: Handles (17) are symmetrically provided on the outer side walls of both sides of the box body (1), and a light (19) is provided at one end of the top of the box body (1) close to the connecting pipe (3).

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