Explosion-proof axial flow fan with temperature rise control function

Abstract

The utility model discloses an explosion-proof axial flow fan with a temperature rise control function, which comprises an air duct, a supporting seat fixed in the air duct, and a fan fixed on the supporting seat, a first cavity is arranged in the supporting seat, the first cavity is provided with an input port and an output port, and the output port is provided with a second cavity. A plurality of heat dissipation fins are evenly distributed on the supporting base with the circle point as the axis, each heat dissipation fin is provided with a second cavity and communicated with the first cavity, and a damping device is arranged at the connecting position of the supporting base and the air duct and used for reducing noise generated when the draught fan operates. Cooling liquid media are continuously conveyed into the first cavity and the second cavity through the input port, the temperature of the fan is reduced, meanwhile, the temperature of the output air volume of the fan is reduced, radial movement or shaking generated when the fan operates is reduced through the damping device, and the product has the advantages of controlling temperature rise and reducing noise.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof electrical appliances, in particular to an explosion-proof axial flow fan with a temperature rise control function. Background Art

[0002] At present, domestic explosion-proof axial flow fans have become a need in most places, such as schools, hospitals, grain and oil processing, papermaking, medicine and other departments. They are also widely used. They are particularly important for the transportation of flammable gases and workshops and warehouses with flammable oil mist.

[0003] Existing axial flow fans are mostly used in places with high temperatures. Due to the high temperature of the gas being transported, the heat generated by the electric energy drive is difficult to dissipate quickly. For example, in places such as ship engine rooms, in addition to high temperatures, many factories today also have many highly concentrated and flammable substances during production and processing. Sparks generated by mechanical friction or static electricity release may cause fire or explosion, posing certain safety hazards to workers. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional explosion-proof axial flow fan design and provide a product that controls temperature rise and reduces noise.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] An explosion-proof axial flow fan with a temperature rise control function comprises a wind tube, a support base fixed in the wind tube, and a fan fixed on the support base, wherein a first cavity is provided in the support base, the first cavity is provided with an input port and an output port, the support base is provided with a plurality of heat dissipation fins evenly distributed with a dot as the axis, the heat dissipation fins are provided with a second cavity and are connected with the first cavity, and a shock absorbing device is provided at the connection between the support base and the wind tube for reducing the noise during the operation of the fan.

[0007] Preferably, a plurality of fixing frames are evenly distributed on the inner wall of the air duct with a circle as the axis, a filter net is provided at the air volume inlet of the air duct, and a protective net is provided at the air volume outlet of the air duct.

[0008] Preferably, a spacing of heat dissipation fins is reserved between the outer wall of the support base and the inner wall of the wind tube, the support base is provided with an extension arm corresponding to the fixing frame, and the extension arm is provided with a first blind hole.

[0009] Preferably, the shock absorbing device includes a guide rail, a shock absorbing pad, and a spring. The guide rail is installed and fixed on the mounting frame. The guide rail is provided with a slider. The shock absorbing pad is installed and fixed on the slider. The shock absorbing pad is connected and fixed to the extension arm. The spring is arranged in the first blind hole and abuts against the inner wall of the air duct.

[0010] Preferably, the air duct is provided with rubber wire holes corresponding to the input port and the output port, and the inner wall of the rubber wire hole is provided with an O-ring.

[0011] Preferably, the input port and the output port are provided with threaded interfaces, and the threaded interfaces are provided with hoses that pass through rubber wire holes.

[0012] Preferably, the support seat is provided with a second blind hole, and the fan is fixed in the second blind hole.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model continuously delivers cooling liquid medium into the first cavity and the second cavity through the input port, and while reducing the temperature of the fan, it also reduces the temperature of the fan output air volume, thereby effectively controlling the temperature rise of the fan and enabling the fan to operate for a long time; by arranging a shock-absorbing pad and a matching spring between the extension arm and the slider connection and fixation, the radial vibration generated when the fan is running, or the jitter when the fan is started and stopped, is reduced, thereby avoiding the resonance generated when the fan is running, resulting in noise caused by friction between parts, and the spring prevents the fan from irregular radial movement when it fails, avoiding the fan blades from contacting the inner wall of the wind tube and generating sparks, so that the product has the advantages of controlling temperature rise and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded diagram of an explosion-proof axial flow fan with a temperature rise control function according to the utility model;

[0017] Figure 2 It is a schematic diagram of the side cross-section structure of an explosion-proof axial flow fan with a temperature rise control function according to the utility model;

[0018] Figure 3 This is a schematic cross-sectional structure diagram of an explosion-proof axial flow fan with a temperature rise control function according to the utility model;

[0019] Figure 4 This is an exploded diagram of a shock absorbing device of an explosion-proof axial flow fan with a temperature rise control function according to the utility model;

[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0021] Figure numerals: 1. air duct; 2. support base; 3. fan; 4. shock absorbing device; 5. input port; 6. output port; 7. heat sink fin; 8. rubber wire hole; 9. threaded interface; 11. fixing bracket; 12. filter screen; 13. protective net; 21. first cavity; 22. second blind hole; 23. extension arm; 24. first blind hole; 41. guide rail; 42. shock absorbing pad; 43. spring; 44. slider; 71. second cavity; 81. O-ring; 91. hose. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] Reference example Figures 1 to 4 , an explosion-proof axial flow fan with a temperature rise control function, comprising a wind tube 1, a support base 2 fixed in the wind tube 1, and a fan 3 fixed on the support base 2, a first cavity 21 is provided in the support base 2, the first cavity 21 is provided with an input port 5 and an output port 6, the support base 2 is evenly distributed with a plurality of heat dissipation fins 7 with a dot as the axis, the heat dissipation fins 7 are provided with a second cavity 71, and are communicated with the first cavity 21, and a shock absorbing device 4 is provided at the connection between the support base 2 and the wind tube 1, for reducing the noise of the fan 3 during operation;

[0025] It is worth mentioning that a plurality of fixing frames 11 are evenly distributed on the inner wall of the wind tube 1 with the dot as the axis, a filter screen 12 is provided at the air volume inlet of the wind tube 1, and a protective net 13 is provided at the air volume outlet of the wind tube 1. The fixing frame 11 provides a support point for the guide rail 41. The filter screen 12 filters the dust and particles in the air sucked into the wind tube 1 by the fan 3 to prevent the dust particles from adhering to the blades of the fan 3, resulting in a reduction in rotation speed, vibration, and a reduction in wind force. The protective net 13 prevents personnel, tools and other objects from accidentally touching the rotating blades.

[0026] It is worth mentioning that a spacing of the heat dissipation fins 7 is left between the outer wall of the support base 2 and the inner wall of the wind tube 1, and the support base 2 is provided with an extension arm 23 corresponding to the fixing frame 11, and the extension arm 23 is provided with a first blind hole 24. The air flows through the spacing between the support base 2 and the wind tube 1, and generates heat exchange with the heat dissipation fins 7, thereby reducing the temperature of the output air volume. At the same time, when the fan 3 vibrates radially, the heat dissipation fins 7 abut against the inner wall of the wind tube 1 and also limit the radial movement distance of the fan 3, and the radius of the fan blades of the fan 3 is smaller than the length of the heat dissipation fins 7. The extension arm 23 is used in conjunction with the guide rail 41 shock absorbing device 4, and the first blind hole 24 provides a storage space for the spring 43 and prevents the spring 43 from falling off the first blind hole 24;

[0027] The guide rail 41 is provided with a slider 44, and the shock absorbing pad 42 is fixed on the slider 44. The shock absorbing pad 42 is connected and fixed to the extension arm 23, and the spring 43 is arranged in the first blind hole 24 and abuts against the inner wall of the air duct 1. The guide rail 41 reduces the resistance of the slider 44 to movement. The shock absorbing pad 42 prevents the fan blades of the fan 3 from generating a rotational force and moving back and forth when rotating, and prevents the extension arm 23 from directly contacting the slider 44, causing the two components to generate abnormal noise due to long-term friction. When the fan 3 generates radial vibration, the extension arm 23 drives the slider 44 to move toward the inner wall of the air duct 1, so that the spring 43 is squeezed. The spring 43 absorbs the buffer and releases the elastic force, thereby reducing the collision force of the heat dissipation fin 7 hitting the inner wall of the air duct 1 violently, thereby preventing the rotating fan blades from touching the inner wall of the air duct 1 and generating sparks.

[0028] It is worth mentioning that the air duct 1 is provided with a rubber wire hole 8 corresponding to the input port 5 and the output port 6, and an O-type sealing ring 81 is provided on the inner wall of the rubber wire hole 8. The rubber wire hole 8 prevents the hose 91 from rubbing against the air duct 1, and the O-type sealing ring 81 ensures the sealing of the hose 91 and the rubber wire hole 8, preventing dust and particles in the external flammable and explosive places from entering the air duct 1;

[0029] It is worth mentioning that the input port 5 and the output port 6 are provided with a threaded interface 9, and the threaded interface 9 is provided with a hose 91 and passes through the rubber wire hole 8. The threaded interface 9 is convenient for connecting with the hose 91, and the cooling liquid medium is continuously delivered to the input port 5 through the hose 91, and enters the first cavity 21 and the second cavity 71. The liquid medium absorbs the temperature generated when the fan 3 is running, thereby effectively controlling the temperature rise of the fan 3, so that the fan 3 can run for a long time, and performs heat exchange with the air passing through the wind tube 1 through the heat dissipation fins 7, thereby reducing the temperature of the wind tube 1 when the air volume is output. Finally, the liquid medium that absorbs heat is discharged through the output port 6;

[0030] It is worth mentioning that the support base 2 is provided with a second blind hole 22, and the fan 3 is fixed in the second blind hole 22. The second blind hole 22 wraps the fan 3, thereby increasing the contact area with the fan 3 and improving the heat conduction efficiency.

[0031] The above design scheme can enable the product to achieve the advantages of controlling temperature rise and reducing noise.

[0032] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An explosion-proof axial flow fan with a temperature rise control function, comprising a wind tube (1), a support base (2) fixed in the wind tube (1), and a fan (3) fixed on the support base (2), characterized in that: The support base (2) is provided with a first cavity (21), the first cavity (21) is provided with an input port (5) and an output port, the support base (2) is provided with a plurality of heat dissipation fins (7) evenly distributed around a circle as an axis, the heat dissipation fins (7) are provided with a second cavity (71) and are in communication with the first cavity (21), and a shock absorbing device (4) is provided at the connection between the support base (2) and the wind tube (1) for reducing the noise of the fan (3) during operation.

2. The explosion-proof axial flow fan with temperature rise control function according to claim 1, characterized in that: The inner wall of the wind tube (1) is evenly distributed with a circle as the axis, a filter screen (12) is provided at the air volume inlet of the wind tube (1), and a protective screen (13) is provided at the air volume outlet of the wind tube (1).

3. The explosion-proof axial flow fan with temperature rise control function according to claim 2, characterized in that: A spacing of the heat dissipation fins (7) is left between the outer wall of the support seat (2) and the inner wall of the wind tube (1); the support seat (2) is provided with an extension arm (23) corresponding to the fixing frame (11); and the extension arm (23) is provided with a first blind hole (24).

4. The explosion-proof axial flow fan with temperature rise control function according to claim 3, characterized in that: The shock absorbing device (4) comprises a guide rail (41), a shock absorbing pad (42), and a spring (43); the guide rail (41) is mounted and fixed on a mounting frame; the guide rail (41) is provided with a slider (44); the shock absorbing pad (42) is mounted and fixed on the slider (44); the shock absorbing pad (42) is connected and fixed to the extension arm (23); and the spring (43) is arranged in the first blind hole (24) and abuts against the inner wall of the air duct (1).

5. The explosion-proof axial flow fan with temperature rise control function according to claim 1, characterized in that: The air cylinder (1) is provided with rubber wire holes (8) corresponding to the input port (5) and the output port, and the inner wall of the rubber wire hole (8) is provided with an O-type sealing ring (81).

6. The explosion-proof axial flow fan with temperature rise control function according to claim 5, characterized in that: The input port (5) and the output port are provided with a threaded interface (9), and the threaded interface (9) is provided with a hose (91) passing through a rubber wire hole (8).

7. The explosion-proof axial flow fan with temperature rise control function according to claim 1, characterized in that: The support seat (2) is provided with a second blind hole (22), and the fan (3) is fixed in the second blind hole (22).

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