Anti-explosion axial flow fan

Abstract

The utility model provides an anti-explosion axial flow fan which comprises a foot stool and a fan body detachably installed on the foot stool. The fan comprises a shell, an impeller and a motor for driving the impeller; the foot stool comprises supporting foot stools and a foot stool base, the supporting foot stools are installed on the left side and the right side of the fan respectively, the lower ends of the supporting foot stools are detachably sleeved with the foot stool base, and the supporting foot stools are adjusted in a telescopic mode through an adjusting device, so that the height of the fan can be adjusted according to actual use conditions, and the fan is suitable for use places which are not suitable for being hoisted or are high above the ground; the movable mechanisms are arranged on the two sides of the fan, so that the fan can swing upwards or downwards to a proper angle and is positioned and fixed, the axial flow fan is suitable for use places provided with obstacles or sheltered places, and the inclination angle of the axial flow fan can be adjusted according to actual use conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an explosion-proof axial flow fan. Background Art

[0002] Explosion-proof axial flow fans are widely used in many places, such as hospitals, schools, and factories, where temperatures are high or dust is abundant. Their primary function is to transport gases, particularly high-temperature gases or flammable and explosive gases with high dust concentrations. Typically, these fans are hoisted from the ceiling and connected to pipelines, or supported on the ground by brackets. However, existing axial flow fans are not suitable for complex installation environments, such as when the pipeline is too low to be hoisted and the bracket cannot be adjusted to the required height, or when there are obstacles blocking the airflow and the air outlet angle needs to be adjusted. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an explosion-proof axial flow fan.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An explosion-proof axial flow fan comprises a tripod and a fan detachably mounted on the tripod; the fan comprises a casing, an impeller, and a motor for driving the impeller; the tripod comprises a supporting tripod and a tripod base, the supporting tripods being mounted on the left and right sides of the fan respectively, and a detachable tube at the lower end being sleeved in the tripod base and being telescopically adjusted by an adjusting device.

[0006] Furthermore, the supporting leg includes a first supporting leg, a second supporting leg and a connecting rod, the two ends of the connecting rod are respectively connected to the ends of the first supporting leg and the second supporting leg, and the three form a trapezoidal shape that is narrow at the top and wide at the bottom; the position of the fan casing corresponding to the connecting rod is provided with a side panel that is convenient for connection with the connecting rod.

[0007] Furthermore, the adjustment device includes an adjustment knob and a base mounting hole set on the tripod base. A push rod is provided on one side of the adjustment knob. The push rod is screwed into the base mounting hole through a thread until it abuts against the outer wall of the supporting tripod to position the supporting tripod.

[0008] Furthermore, a reinforcement positioning block is provided at one end of the push rod that abuts the support leg. The reinforcement positioning block is in an arc shape that adapts to the shape of the outer wall of the support leg, and its inner wall is wrapped around the outer side of the support leg to position the support leg.

[0009] Furthermore, an anti-slip layer is provided on the inner side of the reinforced positioning block.

[0010] Furthermore, the adjustment device includes an adjustment knob, several tripod mounting holes arranged on the supporting tripod, and a base mounting hole arranged on the tripod base; a push rod is provided on one side of the adjustment knob and is screwed into the base mounting hole and the tripod mounting hole in turn through a thread to position the supporting tripod.

[0011] Furthermore, movable mechanisms are provided on the left and right sides of the fan, and the inclination angle between the fan and the tripod is adjusted and positioned through the movable mechanisms; bearings, angle adjustment modules and positioning parts are provided in the movable mechanism, and the bearings are respectively connected to the fan and the tripod, and the angle adjustment module is provided on the fan and adjusts the rotation angle through the bearings, and the positioning part is installed on the tripod through an elastic tensioning device and is movably inserted into the angle adjustment module.

[0012] Furthermore, the cross section of the angle adjustment module has a plurality of sockets in a circular array, and correspondingly, one side of the positioning portion is provided with a plurality of slottings, and the slottings are movably inserted into the sockets to position the angle adjustment module.

[0013] Furthermore, the tripod is provided with an installation groove for installing the positioning part, a limiting groove is provided in the installation groove, and a limiting block is provided at the position of the positioning part corresponding to the limiting groove, and both ends of the elastic tensioning device are respectively connected to the limiting groove and the limiting block.

[0014] The utility model has the following beneficial effects: 1. A tripod for supporting the fan is provided, the tripod comprising a supporting leg and a leg base. The supporting leg is retractable and sheathed within the leg base and is positioned and fixed by an adjustment device, thereby enabling the fan to be adjusted in height according to actual use, making it suitable for use in locations that are not suitable for hoisting or high above the ground. 2. Movable mechanisms are provided on both sides of the fan to enable the fan to be swung upward or downward to a suitable angle and positioned and fixed, making it suitable for use in locations with obstacles or shielded areas, and enabling the tilt angle of the axial flow fan to be adjusted according to actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the overall structure of Example 1 of the present utility model.

[0016] Figure 2 This is an exploded view of the overall structure of Example 1 of the present utility model.

[0017] Figure 3 This is a three-dimensional diagram of the adjustment device of Example 1 of the present utility model.

[0018] Figure 4 This is a structural diagram of the adjustment device and the reinforced positioning block of the second embodiment of the present utility model.

[0019] Figure 5 Schematic diagram of the fixing method of the adjusting device and the tripod according to the first embodiment of the present invention.

[0020] Figure 6 Schematic diagram of the fixing method of the adjusting device and the tripod in the third embodiment of the present invention.

[0021] Figure 7 This is an exploded and enlarged view of the movable mechanism of the fourth embodiment of the present utility model.

[0022] Figure 8 This is an enlarged view of the positioning part structure of the fourth embodiment of the present utility model.

[0023] Reference numerals in the figures: tripod 1, supporting tripod 11, first supporting leg 111, second supporting leg 112, connecting rod 113, tripod mounting hole 115, reinforcing positioning block 116, tripod base 12, base mounting hole 121, pipe sleeve 122, mounting groove 13, limiting groove 131;

[0024] Fan 2, housing 21, impeller 22, motor 23, side plate 24, motor bracket 25, flange 26;

[0025] Adjustment device 3, adjustment knob 31, push rod 32;

[0026] Movable mechanism 4, bearing 41, angle adjustment module 42, insertion hole 421, positioning part 43, positioning part body 431, slotting 432, limit block 433, elastic tensioning device 44. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] Example 1:

[0031] like Figure 1-Figure 3 As shown, an explosion-proof axial flow fan is used for indoor ventilation or connecting between pipes to accelerate gas circulation. It includes a tripod 1 and a fan 2 that can be detachably mounted on the tripod 1. The fan 2 includes a casing 21, an impeller 22, and a motor 23 that drives the impeller 22. The casing 21 has openings at the front and rear ends. The impeller 22 and the motor 23 are fixedly mounted in the casing 21. A grid is provided at the opening of the casing 21 on the side close to the impeller 22 to block debris and prevent people from approaching the impeller 22 to avoid injury. The tripod 1 includes a supporting tripod 11 and a tripod base 12. The supporting tripod 11 is respectively mounted on the left and right sides of the fan 2, and the detachable pipe at the lower end is sleeved in the tripod base 12 and is telescopically adjusted by the adjustment device 3.

[0032] The detachable installation method makes the use of fan 2 more flexible. Usage scenario one: it can be placed in indoor places such as factories that require exhaust and ventilation through the tripod 1, and the indoor air can be quickly discharged to the outside, which has the effect of rapid ventilation and indoor air circulation. Usage scenario two: connected between two exhaust pipes to speed up the gas circulation in the pipes, and the retractable and adjustable tripod 1 can adjust the fan 2 to the corresponding height according to the height of the pipe, which is convenient for docking installation and provides upward support force to the fan 2 to reduce the load on the pipe. Usage scenario three: connected between two pipes on the ceiling to speed up the gas circulation in the pipe. The detachable method makes it easy to separate the fan 2 from the tripod 1 and install the fan 2 under the roof by hoisting and connect it to the hoisted pipe.

[0033] Three or more motor brackets 25 are provided within the housing 21 of the fan 2 for supporting and securing the motor 23. The motor brackets 25 are evenly distributed around the motor 23, with two sides connected to the motor 23 and the inner wall of the housing 21. Specifically, the motor brackets 25 are H-shaped, with one side secured to the inner wall of the housing 21 by welding or screws, and the other side secured to the outer wall of the motor by screws, thereby securing the motor 23 at the axis center within the housing 21.

[0034] Furthermore, in order to achieve explosion-proof effect and facilitate use in flammable and explosive places, the motor 23 is an explosion-proof motor. The common model on the market is YB3 explosion-proof motor. The material of the motor 23 and the housing 21 is iron, and the material of the impeller 22 is aluminum.

[0035] Furthermore, since the shell 21 is cylindrical, it is easily deformed by external forces during installation or transportation. Therefore, outward-turned flanges 26 are provided at the front and rear openings of the shell 21 to strengthen the strength of the shell 21.

[0036] Furthermore, the support leg 11 includes a first support leg 111, a second support leg 112, and a connecting rod 113. The ends of the connecting rod 113 are respectively connected to the upper ends of the first support leg 111 and the second support leg 112. The three are arranged in a trapezoidal shape that is narrow at the top and wide at the bottom, making its center of gravity more stable and less likely to tip over. The fan 2 housing 21 and the support leg 11 are fixedly mounted by welding or screwing. Furthermore, since both have arc-shaped outer surfaces, in order to increase the contact area between the two and make the connection between the two more secure, a side plate 24 is provided on the housing 21 at the position corresponding to the connecting rod 113 to facilitate connection with the connecting rod 113.

[0037] Furthermore, the tripod base 12 is provided with four pipe sleeves 122 corresponding to the supporting tripod 11 and extends along the direction of the first supporting foot 111 and the second supporting foot 112. The lower ends of the first supporting foot 111 and the second supporting foot 112 are adapted to be inserted into the corresponding pipe sleeves 122.

[0038] In order to achieve the telescopic adjustment effect of the tripod 1, as shown in FIG. Figure 5 As shown, an adjusting device 3 is provided on the pipe sleeve 122, and the adjusting device 3 includes an adjusting knob 31 and a base mounting hole 121 set on each pipe sleeve 122. A push rod 32 is provided on one side of the adjusting knob 31, and the push rod 32 is provided with an external thread and is screwed into the base mounting hole 121 through the thread until it abuts against the outer wall of the support bracket 11 to position the support bracket 11. When the height of the fan 2 needs to be adjusted, the adjusting device 3 is loosened and the fan 2 is raised and lowered to an appropriate height, and then the adjusting device 3 is tightened to position the support bracket 11.

[0039] Further, such as Figure 5 As shown, in order to increase the contact area between the top rod 32 and the supporting leg 11, thereby increasing the friction between the two and making the positioning of the supporting leg 11 more stable when the adjusting device 3 is tightened, a concave surface can be provided on the side of the supporting leg 11 facing the top rod 32, and the concave surface is adapted to the end shape of the top rod 32.

[0040] Example 2:

[0041] like Figure 4As shown, what is different from the first embodiment is that in order to make the positioning of the support leg 11 more stable and not easy to slide down after the adjusting device 3 is tightened, and at the same time, there is no need to further process the support leg 11 to change its shape, the end of the top rod 32 that abuts the support leg 11 is provided with a reinforced positioning block 116, and the reinforced positioning block 116 is arc-shaped and adapted to the outer wall of the support leg 11. When the adjusting device 3 is tightened, the inner wall of the reinforced positioning block 116 is wrapped around the outer side of the support leg 11 to hold the support leg 11 tightly. At this time, the support leg 11 is tightly clamped between the inner wall of the pipe sleeve 122 and the inner wall of the reinforced positioning block 116. Due to the increase in the contact area between the three, the friction force also increases, thereby playing a better positioning role for the support leg 11, so that it is not affected by its own gravity and slides down during use.

[0042] Furthermore, an anti-slip layer can be provided on the inner side of the reinforced positioning block 116. The anti-slip layer is fixed to the reinforced positioning block 116 by gluing. The anti-slip layer can be distributed in a strip shape on the inner wall of the reinforced positioning block 116, or it can be in a sheet shape that completely covers the inner wall of the reinforced positioning block 116. The anti-slip layer can be made of materials such as PVC, PU, ​​silicone, rubber, and foam.

[0043] Example 3:

[0044] like Figure 6 As shown, this embodiment differs from the first embodiment in that the adjustment device 3 includes an adjustment knob 31, a base mounting hole 121, and a plurality of tripod mounting holes 115. The base mounting holes 121 are symmetrically arranged on both sides of the tripod base 12 and are evenly distributed longitudinally, and the tripod mounting holes 115 are symmetrically arranged on the supporting tripod 11. When the tripod mounting holes 115 and the base mounting holes 121 are adjusted to a coaxial position and the adjustment knob 31 is passed through, the supporting tripod 11 is positioned.

[0045] Specifically, the top rod 32 on one side of the adjustment knob 31 is screwed into the base mounting hole 121 and the tripod mounting hole 115 from one side of the tripod base 12 in sequence, and passes through the tripod mounting hole 115 and the base mounting hole 121 on the other side in sequence, thereby achieving the positioning and fixation of the supporting tripod 11.

[0046] When the height of the fan 2 needs to be adjusted, it is only necessary to unscrew the adjustment knob 31 and raise or lower the support leg 11 to a suitable height, and repeat the above steps to position and fix the support leg 11.

[0047] Example 4:

[0048] Different from the first embodiment, Figure 7 、 Figure 8As shown, to adapt to the needs of various locations, a movable mechanism 4 is provided to facilitate adjustment of the blowing angle of the fan 2. Specifically, the movable mechanism 4 is located on the left and right sides of the fan 2 and adjusts the tilt angle between the fan 2 and the tripod 1 by rotating it upward or downward to position it. The movable mechanism 4 is equipped with a bearing 41, an angle adjustment module 42, and a positioning portion 43.

[0049] One end of the angle adjustment module 42 is connected to the housing 21 of the fan 2, specifically by welding or integral molding. It fits over the outer ring of the bearing 41 and has several evenly spaced insertion holes 421 on its cross section. These insertion holes 421 work in conjunction with the positioning portion 43. The inner ring of the bearing 41 fits snugly onto the leg 1, allowing the fan 2 to rotate clockwise or counterclockwise around the bearing 41.

[0050] The positioning part 43 is provided on the tripod 1 and is movably inserted into the angle adjustment module 42. Specifically, the positioning part 43 includes a positioning part body 431 and slots 432 located on one side of the positioning part body 431. The slots 432 are evenly distributed at positions corresponding to the insertion holes 421 and are adapted to the insertion holes 421.

[0051] The tripod 1 is provided with a mounting groove 13 for mounting the positioning body 431 . The slot 432 passes through the inner circle of the mounting groove 13 and is correspondingly inserted into the insertion hole 421 . The positioning body 431 is then limited on the mounting groove 13 .

[0052] Furthermore, in order to prevent the positioning portion 43 from rotating with the fan 2 in the installation slot 13, thereby preventing the angle adjustment effect from being achieved, a limit slot 131 is provided in the installation slot 13, and a limit block 433 is provided at the position of the positioning portion 43 corresponding to the limit slot 131. Specifically, the limit block 433 is located on the left and right sides of the positioning portion body 431, and is adapted to be installed in the corresponding limit slot 131, to limit the positioning portion 43 so that it cannot rotate with the fan 2, thereby positioning the fan 2.

[0053] Furthermore, to prevent the positioning portion 43 from becoming loose due to collision or vibration during use, which could cause the fan 2 to shake and become unable to be positioned, an elastic tensioning device 44 is provided in the limiting groove 131. One end of the elastic tensioning device 44 is connected to the limiting groove 131, and the other end is connected to the limiting block 433. Specifically, the elastic tensioning device 44 is a tension spring.

[0054] When the angle needs to be adjusted, pull out the positioning parts 43 on both sides. At this time, the fan 2 is in a freely rotatable state. After adjusting it clockwise or counterclockwise to a suitable angle, reset the positioning part 43 and align the slot 432 with the socket 421 and insert them. After the positioning part 43 is reset, the limit block 433 of the positioning part 43 is adapted to be located in the limit groove 131, and the angle adjustment of the fan 2 is completed.

[0055] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features. Any technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of existing technologies should be within the scope of protection determined by the claims.

Claims

1. An explosion-proof axial flow fan, characterized in that: The invention comprises a tripod (1) and a fan (2) detachably mounted on the tripod (1); the fan (2) comprises a housing (21), an impeller (22), and a motor (23) for driving the impeller (22); the tripod (1) comprises a supporting tripod (11) and a tripod base (12); the supporting tripod (11) is mounted on the left and right sides of the fan (2), respectively, and a detachable tube at the lower end is sleeved in the tripod base (12) and is telescopically adjusted by an adjusting device (3); the adjusting device (3) comprises an adjusting knob (31) and a base mounting hole (121) provided on the tripod base (12); a push rod (32) is provided on one side of the adjusting knob (31); the push rod (32) is screwed into the base mounting hole (121) by a thread until it abuts against the outer wall of the supporting tripod (11), thereby positioning the supporting tripod (11).

2. The explosion-proof axial flow fan according to claim 1, characterized in that: The support leg (11) comprises a first support leg (111), a second support leg (112) and a connecting rod (113), wherein the two ends of the connecting rod (113) are respectively connected to the ends of the first support leg (111) and the second support leg (112), and the three are arranged in a trapezoidal shape that is narrow at the top and wide at the bottom; the fan (2) housing (21) is provided with a side plate (24) at a position corresponding to the connecting rod (113) for facilitating connection with the connecting rod (113).

3. The explosion-proof axial flow fan according to claim 1, characterized in that: A reinforcing positioning block (116) is provided at one end of the top rod (32) that abuts the supporting leg (11). The reinforcing positioning block (116) is in an arc shape that matches the shape of the outer wall of the supporting leg (11), and its inner wall is wrapped around the outer side of the supporting leg (11) to position the supporting leg (11).

4. The explosion-proof axial flow fan according to claim 3, characterized in that: The inner side of the reinforced positioning block (116) is provided with an anti-slip layer.

5. The explosion-proof axial flow fan according to claim 1, characterized in that: The adjusting device (3) comprises an adjusting knob (31), a plurality of tripod mounting holes (115) provided on the supporting tripod (11), and a base mounting hole (121) provided on the tripod base (12); a push rod (32) is provided on one side of the adjusting knob (31) and is screwed into the base mounting hole (121) and the tripod mounting hole (115) in sequence through a thread to position the supporting tripod (11).

6. The explosion-proof axial flow fan according to claim 1, characterized in that: The fan (2) is provided with movable mechanisms (4) on the left and right sides thereof, and the tilt angle between the fan and the tripod (1) is adjusted and positioned by the movable mechanisms (4); a bearing (41), an angle adjustment module (42) and a positioning portion (43) are provided in the movable mechanism (4); the bearing (41) is connected to the fan (2) and the tripod (1) respectively; the angle adjustment module (42) is provided on the fan (2) and adjusts the rotation angle by the bearing (41); the positioning portion (43) is installed on the tripod (1) by an elastic tensioning device (44) and is movably inserted into the angle adjustment module (42).

7. The explosion-proof axial flow fan according to claim 6, characterized in that: The cross section of the angle adjustment module (42) has a plurality of sockets (421) in a circular array. Correspondingly, one side of the positioning portion (43) is provided with a plurality of slots (432). The slots (432) are movably inserted into the sockets (421) to position the angle adjustment module (42).

8. The explosion-proof axial flow fan according to claim 6, characterized in that: The tripod (1) is provided with a mounting groove (13) for mounting the positioning portion (43), a limiting groove (131) is provided in the mounting groove (13), a limiting block (431) is provided at a position of the positioning portion (43) corresponding to the limiting groove (131), and two ends of the elastic tensioning device (44) are respectively connected to the limiting groove (131) and the limiting block (431).

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