Air inlet protection device of axial flow fan

Abstract

The utility model relates to the technical field of axial flow fans, in particular to an air inlet protection device of an axial flow fan. Comprising an axial flow fan, a double-motion motor is arranged in an axial flow fan shell, a fan is fixedly connected to an output shaft of the double-motion motor, a cylinder is fixedly connected to the interior of the axial flow fan shell through a supporting rod, a plurality of rotating shafts are rotationally connected to the interior of the axial flow fan shell, the other ends of the rotating shafts are rotationally connected with the cylinder, and filter screens are fixedly connected to the surfaces of the rotating shafts. According to the utility model, the output shaft of the double-motion motor can be connected with the rotating shaft through the locking mechanism when the posture of the filter screen needs to be adjusted, so that the rotating shaft can be driven to rotate when the double-motion motor works, and the posture of the filter screen can be adjusted; in this way, the protection effect on the interior of the axial flow fan can be increased in the environment with heavy wind and sand, and the problems that in the environment with heavy dust and gravel residue splashing, the fan blades are prone to being damaged, and the protection effect of the axial flow fan is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to axial flow fan technical field especially relates to an air inlet protection device of axial flow fan. BACKGROUND

[0002] The axial flow fan is also called local fan, and is a kind of fan commonly used in industrial and mining enterprises, but it is different from general fan, the motor and fan blade of the axial flow fan are in a cylinder, and the shape is a cylinder, is used for local ventilation, is easy to install, and the ventilation and air exchange effect is obvious, is safe, can be connected with air cylinder to send air to specified area. The axial flow fan is widely used, and can be used for ventilation and air exchange or heat dissipation in metallurgy, chemical industry, light industry, food, pharmaceutical equipment, mechanical equipment and civil building.

[0003] The common axial flow fan in the market has the following problems:

[0004] The air inlet of the axial flow fan is provided with filter screen to intercept dust and sundries to protect the fan blade of the axial flow fan, usually the filter screen is fixedly arranged, and the aperture of the filter screen is fixed, so the protection effect of the axial flow fan is limited, in some tunnel, subway and other construction environments, a large amount of dust is produced, and some construction residues or small stones are also mixed, the filter screen with small aperture is needed to be used in such environment to intercept the residues or small stones, so as to enhance the protection effect of the air inlet of the axial flow fan, and then protect the fan blade and reduce the damage to the fan blade, and the filter screen with large aperture is needed to be used in some construction environments with high flow requirement and low pressure requirement, so as to increase the air passing amount and enhance the air exchange efficiency, and the construction personnel need to select different filter screens according to different use environments, so the same filter screen cannot adapt to all environments, and the applicability is not strong.

[0005] Therefore, the utility model provides an air inlet protection device of axial flow fan. UTILITY MODEL CONTENTS

[0006] In order to overcome the defects in the above background art, the utility model provides an air inlet protection device of axial flow fan.

[0007] The utility model discloses a technical implementation scheme of an air inlet protection device of an axial flow fan, which comprises an axial flow fan shell, a double-movement motor is arranged in the axial flow fan shell, a fan is fixedly connected to the output shaft of the double-movement motor, a cylinder is fixedly connected to the axial flow fan shell through a support rod, a plurality of rotating shafts are rotatably connected to the axial flow fan shell, one end of each rotating shaft is rotatably connected to the cylinder, a filter screen is fixedly connected to the surface of each rotating shaft, and the filter screen can be adjusted in posture under the driving of the rotating shaft.

[0008] Further, the locking mechanism comprises a prism, the end of the output shaft of the double-movement motor is fixedly connected with the prism, a rotating shaft is rotatably connected in the cylinder, the end of the rotating shaft is fixedly connected with a second bevel gear, a first bevel gear is fixedly connected to one end of the rotating shaft in the cylinder, the first bevel gear is engaged with the second bevel gear, a slot is formed in the rotating shaft, the slot is matched with the prism, a locking assembly is arranged in the prism, the locking assembly is convenient for locking the prism and the slot, and the connection is stable.

[0009] Further, the locking assembly comprises an extension block, a movable slot is formed in the prism, a baffle is fixedly connected in the movable slot, a pressing rod is slidably connected in the baffle, a conical pressing block is fixedly connected to the end of the pressing rod, a plurality of extension blocks are movably connected in the movable slot, the extension blocks are located on the movement track of the conical pressing block, a plurality of locking slots are formed in the slot, and the locking slots are matched with the extension blocks.

[0010] Further, springs are fixedly connected to the two sides of the extension block, the other end of each spring is fixedly connected with the movable slot, a tension spring is sleeved on the outside of the pressing rod, one end of the tension spring is fixedly connected with the baffle, and the other end of the tension spring is fixedly connected with the conical pressing block.

[0011] Further, a support frame is fixedly connected to the bottom of the axial flow fan shell and is used for fixing the axial flow fan, a support is fixedly connected in the axial flow fan shell, and the support is fixedly connected with the double-movement motor.

[0012] Further, a magnetic block is arranged at the end of the pressing rod, a magnet is arranged at one end of the extension block in the movable slot, and the magnet has the same magnetism as the magnetic block.

[0013] Further, a magnetic column is fixedly connected to the top of the slot, a conical magnet is slidably connected in the movable slot, and the magnetic column has the same magnetism as the conical magnet.

[0014] Further, the end of the rotating shaft is fixedly connected with a worm, the end of the rotating shaft is fixedly connected with a worm wheel, and the worm is engaged with the worm wheel.

[0015] The utility model has the advantages that: the utility model discloses through locking mechanism can when needing to adjust the attitude of filter screen connect the output shaft of double motion motor with rotating shaft, and then can drive rotating shaft rotation when double motion motor works, and then can adjust the attitude of filter screen, when the attitude of filter screen is adjusted, control the output shaft of double motion motor and rotating shaft again separate, and double motion motor controls fan rotation and ventilates, so can increase the protection effect to the inside of axial flow fan in the environment of much wind and sand, solve the problem of poor protection effect of axial flow fan in the environment of much dust and flying stone residue. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the first kind of three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the second kind of three-dimensional structure schematic diagram of the utility model;

[0018] Figure 3 It is the rear view structure schematic diagram of the utility model;

[0019] Figure 4 It is the three-dimensional structure schematic diagram of double motion motor of the utility model;

[0020] Figure 5 It is the three-dimensional structure schematic diagram of filter screen of the utility model;

[0021] Figure 6 It is the cylindrical section structure schematic diagram of the utility model;

[0022] Figure 7 It is the prism section structure schematic diagram of the utility model;

[0023] Figure 8 It is the structure schematic diagram of embodiment 2 of the utility model;

[0024] Figure 9 It is the structure schematic diagram of embodiment 3 of the utility model.

[0025] Meaning of reference signs in the figure: 1: axial flow fan shell, 2: double motion motor, 3: fan, 4: filter screen, 5: rotating shaft, 6: cylinder, 7: first bevel gear, 8: second bevel gear, 9: rotating shaft, 10: slot, 11: locking slot, 12: prism, 13: movable slot, 14: pressing rod, 15: conical pressing block, 16: baffle, 17: tension spring, 18: protruding block, 19: spring, 20: support frame, 21: support, 22: magnetic block, 23: magnet, 24: magnetic column, 25: conical magnet. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings. Only this statement, the up, down, left, right, front, back, inside, outside and other directions of the utility model appearing or about to appear in the text, only with the drawings of the utility model as the base, it is not the specific limitation of the utility model.

[0027] Example 1

[0028] A kind of axial flow fan's air inlet protection device, as shown in Figures 1-9 Fig. 1, including axial flow fan shell 1, axial flow fan shell 1 is provided with double motion motor 2, double motion motor 2 can make rotary motion, also can make linear extension motion, the output shaft of double motion motor 2 is fixedly connected with fan 3, axial flow fan shell 1 is fixedly connected with cylinder 6 in supporting rod, axial flow fan shell 1 is rotatably connected with several rotating shafts 5, rotating shaft 5 other end is rotatably connected with cylinder 6, rotating shaft 5 surface is fixedly connected with filter screen 4, the wall thickness of filter screen 4 is 3-5 centimeters, the wall thickness of filter screen 4 is thicker than ordinary filter screen, can resist stronger wind sand rubble impact, is favorable to the protection of axial flow fan internal equipment, filter screen 4 can be adjusted under the drive of rotating shaft 5;Locking mechanism is arranged between the output shaft of double motion motor 2 and cylinder 6, locking mechanism is used for adjusting the posture of filter screen 4 by the rotation of double motion motor 2, when people need to adjust the posture of filter screen 4, people start double motion motor 2 to work, the output shaft of double motion motor 2 will drive fan 3 and locking mechanism to move forward, in turn make locking mechanism and cylinder 6 lock together, then can adjust the posture of filter screen 4, adjust the posture of filter screen 4 to the appropriate position, when the posture of filter screen 4 is adjusted, people control double motion motor 2 to act, make locking mechanism and cylinder 6 separate, then control double motion motor 2 to drive fan 3 to rotate and can carry out ventilation work, so as to realize the protection of the air inlet of axial flow fan by adjusting the posture of filter screen 4, which is conducive to protecting the safety of equipment in axial flow fan.

[0029] The locking mechanism comprises a prism 12, the end of the output shaft of the double-movement motor 2 is fixedly connected with the prism 12, the edge of the prism 12 is in a prismatic structure, which is beneficial to locking and better connection, the rotating shaft 9 is rotatably connected in the cylinder 6, the second bevel gear 8 is fixedly connected at the end of the rotating shaft 9, the first bevel gear 7 is fixedly connected at one end of the rotating shaft 5 in the cylinder 6, the first bevel gear 7 is engaged with the second bevel gear 8, the slot 10 is formed in the rotating shaft 9, the edge of the slot 10 is the same as the edge of the prism 12, the slot 10 is matched with the prism 12, the locking assembly is arranged in the prism 12, the locking assembly is convenient to lock the prism 12 and the slot 10, and the stable connection is ensured.

[0030] The locking assembly comprises the protruding blocks 18, the movable slot 13 is formed in the prism 12, the movable slot 13 comprises vertical slots and a plurality of horizontal slots, the baffle 16 is fixedly connected in the movable slot 13, the pressure rod 14 is slidably connected in the baffle 16, the conical pressure block 15 is fixedly connected at the end of the pressure rod 14, the conical pressure block 15 is located in the vertical slot, a plurality of protruding blocks 18 are movably connected in the movable slot 13, the protruding blocks 18 are located in the horizontal slots and correspond to the horizontal slots one by one, the protruding blocks 18 are located on the movement track of the conical pressure block 15, a plurality of locking slots 11 are formed in the slot 10, the locking slots 11 correspond to the protruding blocks 18 and are matched with each other.

[0031] The springs 19 are fixedly connected at the two sides of the protruding blocks 18, the springs 19 are convenient to reset the protruding blocks 18 after the protruding blocks 18 are protruded, the other end of the spring 19 is fixedly connected with the movable slot 13, the pull spring 17 is sleeved outside the pressure rod 14, one end of the pull spring 17 is fixedly connected with the baffle 16, the other end of the pull spring 17 is fixedly connected with the conical pressure block 15, and the pull spring 17 is convenient to reset the conical pressure block 15 and the pressure rod 14.

[0032] The support frame 20 is fixedly connected at the bottom of the axial flow fan shell 1 and is used for fixing the axial flow fan, the support frame 21 is fixedly connected in the axial flow fan shell 1 and is fixedly connected with the double-movement motor 2.

[0033] Working principle: when the axial flow fan is used in the construction environment with a lot of dust and flying stones, people need to adjust the filter screen 4 to the state of completely blocking the air inlet of the axial flow fan shell 1. First, people start the double motion motor 2 to work, the output shaft of the double motion motor 2 drives the fan 3 and the prism 12 to stretch forward, and then the prism 12 is inserted into the insertion slot 10. When the pressure rod 14 contacts with the inner wall of the insertion slot 10, the prism 12 will drive the pressure rod 14 to move into the movable slot 13, the tension spring 17 is stretched, the conical pressing block 15 will extrude the extension block 18, the extension block 18 will move to the outside of the prism 12, and the spring 19 is stretched. When the prism 12 is completely inserted into the insertion slot 10, the conical pressing block 15 will push the extension block 18 out to the position, at this time the extension block 18 will be inserted into the locking slot 11, and then the prism 12 and the rotating shaft 9 are locked. Then people control the double motion motor 2 to rotate, the rotation of the double motion motor 2 drives the prism 12 and the rotating shaft 9 to rotate, the rotating shaft 9 drives the second bevel gear 8 to rotate, the second bevel gear 8 drives the first bevel gear 7 to rotate, the first bevel gear 7 drives the rotating shaft 5 and the filter screen 4 to rotate, and then the filter screen 4 can be adjusted to the required state, such as Figure 1 As shown, the dust and stones are blocked by the filter screen 4, which prevents the stones from impacting the fan 3, double motion motor 2 and other equipment in the axial flow fan shell 1, thereby improving the protection of the air inlet of the axial flow fan.

[0034] When the axial flow fan is used in the environment with better air quality, less pollution and higher flow requirement, people can start the double motion motor 2 to work, the double motion motor 2 drives the prism 12 and the rotating shaft 9 to rotate, the rotating shaft 9 drives the rotating shaft 5 and the filter screen 4 to rotate, and then the filter screen 4 can be adjusted to the state of being perpendicular to the air inlet of the axial flow fan, as shown in Figure 2 At this time, the air inlet of the axial flow fan has the maximum air inlet amount, which can effectively improve the flow of the axial flow fan and quickly ventilate.

[0035] Example 2

[0036] Please refer to Figure 8The application provides a kind of air inlet protection device of axial flow fan, the utility model discloses corresponding improvement for the technical problem mentioned in background art, provides another technical scheme, specifically: the end fixed connection of pressure rod 14 Cone block 15 is replaced by magnetic block 22, one end of the extension block 18 located in the movable slot 13 is provided with magnet 23, magnet 23 and the magnetism of magnetic block 22 are same, when using, when the prism 12 drives pressure rod 14 to move downwards, magnetic block 22 will also move downwards, when magnetic block 22 moves downwards, the magnetic force of magnetic block 22 itself will repel magnet 23, and then with the movement of magnetic block 22, magnet 23 will move to the outside of prism 12, at the same time, magnet 23 will also drive extension block 18 to move outward, so that extension block 18 is inserted into locking slot 11 on the insertion slot 10, locking and fixing of prism 12 and rotating shaft 9 are realized, and double-motion motor 2 can drive filter screen 4 to rotate.

[0037] Example 3

[0038] Please refer to Figure 9 The application provides a kind of air inlet protection device of axial flow fan, the utility model discloses corresponding improvement for the technical problem mentioned in background art, provides another technical scheme, specifically: the top of insertion slot 10 is fixedly connected with magnetic column 24, and conical magnet 25 is slidably connected in movable slot 13, magnetic column 24 and conical magnet 25 have same magnetism, and conical magnet 25 is fixedly connected with movable slot 13 by tension spring 17, when using, when the prism 12 approaches insertion slot 10, magnetic column 24 and conical magnet 25 have same magnetism, conical magnet 25 will move downwards under the repulsion of magnetic column 24, and conical magnet 25 moves downwards to push extension block 18 to move outward, when the prism 12 is inserted into insertion slot 10 in place, conical magnet 25 pushes extension block 18 to be in place, extension block 18 is locked with locking slot 11, and the locking of prism 12 and rotating shaft 9 is realized.

[0039] Example 4

[0040] Please refer to Figures 1-9 The application provides a kind of air inlet protection device of axial flow fan, the utility model discloses corresponding improvement for the technical problem mentioned in background art, provides another technical scheme, specifically: the end fixed connection of rotating shaft 9 Second bevel gear 8 is replaced by worm, and the end fixed connection of rotating shaft 5 First bevel gear 7 is replaced by worm wheel, and worm is engaged with worm wheel, when using, when rotating shaft 9 rotates, rotating shaft 9 will drive worm to rotate, and worm will drive worm wheel to rotate, and worm wheel drives rotating shaft 5 and filter screen 4 to rotate, and then the attitude of filter screen 4 can be adjusted, and the structure of worm wheel and worm can realize the self-locking of filter screen 4, to ensure that filter screen 4 does not deviate due to external force when not needing to be adjusted, and ensure the attitude stability of filter screen 4.

[0041] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An inlet guard for an axial flow fan, characterised in that: The utility model provides a double -motion motor -driven adjustable posture filter screen, including axial flow fan casing (1), be provided with double -motion motor (2) in axial flow fan casing (1), the output shaft of double -motion motor (2) is fixedly connected with fan (3), is fixedly connected with cylinder (6) through support rod in axial flow fan casing (1), is rotatably connected with a plurality of rotating shafts (5) in axial flow fan casing (1), the other end of rotating shaft (5) is rotatably connected with cylinder (6), the surface of rotating shaft (5) is fixedly connected with filter screen (4), and filter screen (4) can be adjusted in attitude under the drive of rotating shaft (5), be equipped with locking mechanism between the output shaft of double -motion motor (2) and cylinder (6), and the locking mechanism is used for the posture adjustment of filter screen (4) through the rotation of double -motion motor (2) drive.

2. An inlet guard for an axial fan as claimed in claim 1, wherein The locking mechanism includes a prism (12), the end of the output shaft of the double-motion motor (2) is fixedly connected with the prism (12), the cylinder (6) is rotatably connected with a rotating shaft (9), the end of the rotating shaft (9) is fixedly connected with a second bevel gear (8), one end of the rotating shaft (5) in the cylinder (6) is fixedly connected with a first bevel gear (7), the first bevel gear (7) is engaged with the second bevel gear (8), the rotating shaft (9) is provided with a slot (10), the slot (10) is matched with the prism (12), the prism (12) is provided with a locking assembly, the locking assembly is convenient for locking the prism (12) and the slot (10), and the connection is stable.

3. An inlet guard for an axial fan as claimed in claim 2, wherein The locking assembly includes an extension block (18), the prism (12) is provided with a movable slot (13), the movable slot (13) is fixedly connected with a baffle (16), the baffle (16) is slidably connected with a pressure rod (14), the end of the pressure rod (14) is fixedly connected with a conical pressure block (15), the movable slot (13) is movably connected with a plurality of extension blocks (18), the extension blocks (18) are located on the motion track of the conical pressure block (15), the slot (10) is provided with a plurality of locking grooves (11), and the locking grooves (11) are matched with the extension blocks (18).

4. An inlet guard for an axial fan as claimed in claim 3, wherein The two sides of the extension block (18) are fixedly connected with springs (19), the other end of the spring (19) is fixedly connected with the movable slot (13), the outer side of the pressure rod (14) is sleeved with a tension spring (17), one end of the tension spring (17) is fixedly connected with the baffle (16), and the other end of the tension spring (17) is fixedly connected with the conical pressure block (15).

5. An inlet guard for an axial fan as claimed in claim 1, wherein The bottom of the axial flow fan casing (1) is fixedly connected with a support frame (20) for fixing the axial flow fan, the axial flow fan casing (1) is fixedly connected with a support (21), and the support (21) is fixedly connected with the double-motion motor (2).

6. An inlet guard for an axial fan as claimed in claim 3, wherein The conical pressure block (15) fixedly connected with the end of the pressure rod (14) is replaced with a magnetic block (22), one end of the extension block (18) located in the movable slot (13) is provided with a magnet (23), and the magnet (23) has the same magnetism as the magnetic block (22).

7. An inlet guard for an axial fan as claimed in claim 3, wherein The top of the slot (10) is fixedly connected with a magnetic column (24), a conical magnet (25) is slidably connected in the movable slot (13), the magnetic column (24) and the conical magnet (25) are magnetically same, and the conical magnet (25) and the movable slot (13) are fixedly connected through a tension spring (17).

8. An inlet guard for an axial fan as claimed in claim 2, wherein The end of the rotating shaft (9) is fixedly connected with a second bevel gear (8) which is replaced by a worm, and the end of the rotating shaft (5) is fixedly connected with a first bevel gear (7) which is replaced by a worm wheel, and the worm and the worm wheel are engaged.

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