阅读说明：本技术 一种用于闭式冷却塔通风的防尘装置 (Dustproof device for ventilation of closed cooling tower ) 是由 谢茂华 周武平 邹捷 于 2021-07-23 设计创作，主要内容包括：本发明涉及一种防尘装置,尤其涉及一种用于闭式冷却塔通风的防尘装置。本发明的技术问题为：提供一种能够保持持续通风,且便于清理灰尘的用于闭式冷却塔通风的防尘装置。技术方案：一种用于闭式冷却塔通风的防尘装置,包括有闭式冷却塔、弧形板、卡板、夹紧机构和通风机构；闭式冷却塔和弧形板,闭式冷却塔上部放置有弧形板；卡板,弧形板内侧左右对称设有两个卡板；夹紧机构,弧形板外侧设有夹紧机构；通风机构,弧形板上设有通风机构。本发明达到了能够保持持续通风,且便于清理灰尘的效果。(The invention relates to a dustproof device, in particular to a dustproof device for ventilation of a closed cooling tower. The technical problem of the invention is as follows: the dustproof device for the ventilation of the closed cooling tower can keep continuous ventilation and is convenient for cleaning dust. The technical scheme is as follows: a dustproof device for ventilation of a closed cooling tower comprises the closed cooling tower, an arc-shaped plate, a clamping mechanism and a ventilation mechanism; the cooling tower comprises a closed cooling tower and an arc-shaped plate, wherein the arc-shaped plate is arranged at the upper part of the closed cooling tower; the clamping plates are symmetrically arranged on the left and right sides of the inner side of the arc plate; the clamping mechanism is arranged on the outer side of the arc-shaped plate; the ventilation mechanism is arranged on the arc-shaped plate. The invention achieves the effects of keeping continuous ventilation and being convenient for cleaning dust.)

1. The utility model provides a dust keeper for ventilation of closed cooling tower which characterized by, including:

the cooling tower comprises a closed cooling tower (1) and an arc-shaped plate (2), wherein the arc-shaped plate (2) is arranged at the upper part of the closed cooling tower (1);

the clamping plates (3), two clamping plates (3) are symmetrically arranged on the left and right of the inner side of the arc-shaped plate (2);

the clamping mechanism (4) is arranged on the outer side of the arc-shaped plate (2);

the ventilation mechanism (5) is arranged on the arc-shaped plate (2).

2. A dust-proof device for ventilation of closed cooling towers according to claim 1, characterised in that the clamping means (4) comprise:

the outer sides of the arc plates (2) are symmetrically and bilaterally provided with two pairs of connecting rods (41) in a sliding manner;

the fixture blocks (42) are arranged between the inner sides of each pair of connecting rods (41), and the fixture blocks (42) are matched with the closed cooling tower (1);

the connecting blocks (43) are arranged between the outer sides of each pair of connecting rods (41);

first spring (44), all be equipped with first spring (44) between connecting block (43) and arc (2), first spring (44) all overlaps on connecting rod (41).

3. A dust-proof device for ventilation of closed cooling towers according to claim 2, characterised in that the ventilation means (5) comprise:

the bracket (51) is arranged on the inner side of the upper part of the arc-shaped plate (2);

a storage battery (52), wherein the storage battery (52) is placed in the bracket (51);

the inner side of the upper part of the arc-shaped plate (2) is symmetrically provided with support rods (53) in front and back, and the support rods (53) are connected with a storage battery (52);

the rotary seat (54) is symmetrically arranged on the arc-shaped plate (2) in front and back;

the fans (55) are rotatably arranged on the inner sides of the lower parts of the rotating bases (54), and the fans (55) are connected with the supporting rods (53);

a solar panel (56), and a solar panel (56) is arranged between the upper parts of the rotary bases (54).

4. A dust-protection device for ventilation of closed cooling towers according to claim 3, characterised in that the protective assembly (7) comprises:

two fixing blocks (71) are symmetrically arranged on the left and right sides of the inner side of the lower part of the arc-shaped plate (2);

the lower parts of the fixed blocks (71) are provided with second guide rods (72);

two pairs of limiting blocks (74) are symmetrically arranged on the left and right sides of the inner side of the lower part of the arc-shaped plate (2);

the push rods (75) are arranged on the lower portions of the second guide rods (72) in a sliding mode, the push rods (75) are connected with the limiting blocks (74) in a sliding mode, and the push rods (75) are matched with the clamping blocks (42);

the fourth springs (73) are arranged between the push rod (75) and the fixed block (71), and the fourth springs (73) are sleeved on the second guide rod (72);

the protective nets (76) are arranged between the push rods (75) on the same side of the protective nets (76), and the protective nets (76) are matched with the upper parts of the closed cooling towers (1).

5. A dust keeper for closed cooling tower ventilation as claimed in claim 4, further comprising a dust extraction module (6), the dust extraction module (6) comprising:

the arc guide rails (61) are symmetrically arranged at the front and the back of the upper part of the arc plate (2);

the lower part of the inner side of the arc-shaped plate (2) is symmetrically provided with the connecting rods (62) in the front-back direction;

the first rotating shafts (63) are symmetrically and rotatably arranged between the connecting rods (62);

the rollers (67) are rotationally arranged on the outer sides of the arc-shaped guide rails (61) in a left-right symmetrical mode;

the rotating rods (64) are symmetrically arranged at the front and back of the outer side of the first rotating shaft (63), and the rotating rods (64) are symmetrically arranged at the front and back of the inner side of the roller (67);

the first guide rods (65) are arranged on the rotating rods (64) on the inner sides of the first guide rods (65) in a sliding mode, and the first guide rods (65) are connected with the rotating rods (64) on the inner sides of the rollers (67);

the second springs (66) are arranged between the rotating rods (64) on the same side, and the second springs (66) are sleeved on the first guide rods (65);

the front sides of the first rotating shafts (63) are provided with full gears (68), and the full gears (68) are meshed with each other;

the lower part of the front side of the connecting rod (62) is provided with a rack (69) in a sliding way, and the rack (69) is meshed with a full gear (68) on the right side;

the lower part of the front side of the supporting rod (53) is provided with a planetary gear (610), the planetary gears (610) are meshed with each other, and the planetary gear (610) is connected with the fan (55) on the front side;

and a third spring (611) is arranged between the lower part of the front side of the connecting rod (62) and the rack (69), and the third spring (611) is sleeved on the connecting rod (62).

6. A dust keeper for closed cooling tower ventilation as claimed in claim 5, further comprising a clamping assembly (8), the clamping assembly (8) comprising:

the inner sides of the second rotating shafts (81) and the push rods (75) are respectively and rotatably provided with the second rotating shafts (81);

the second rotating shaft (81) is symmetrically provided with special-shaped blocks (82), and the special-shaped blocks (82) are matched with the protective net (76);

torsion springs (83) are symmetrically arranged between the special-shaped blocks (82) and the push rod (75), and the torsion springs (83) are all sleeved on the second rotating shaft (81).

7. A dust keeper for closed cooling tower ventilation as claimed in claim 6, further comprising a limiting member (9), wherein the limiting member (9) is provided on one side of the lower portion of the dust removing member (6).

8. A dust keeper for closed cooling tower ventilation as claimed in claim 6, wherein the stop member (9) comprises:

the guide block (91) is arranged at the lower part of the right front side of the connecting rod (62);

the lower part of the guide block (91) is provided with a sliding rod (92) in a sliding way;

the left side of the sliding rod (92) is provided with a wedge block (94);

a fifth spring (93), a fifth spring (93) is arranged between the wedge block (94) and the guide block (91), and the fifth spring (93) is sleeved on the sliding rod (92);

the lower part of the front side of the connecting rod (62) is provided with a third guide rod (95) in a sliding way, and the third guide rod (95) is matched with the wedge-shaped block (94);

and a sixth spring (96), wherein the sixth spring (96) is arranged between the third guide rod (95) and the connecting plate, and the sixth spring (96) is sleeved on the third guide rod (95).

Technical Field

The invention relates to a dustproof device, in particular to a dustproof device for ventilation of a closed cooling tower.

Background

The closed cooling tower is a cooling effect that places tubular heat exchanger in the tower, guarantees closed cooling tower through the air of circulation again, also owing to be the closed circulation for closed cooling tower can guarantee quality of water and does not receive the pollution, has protected the high-efficient operation of equipment, and has improved the life of capital equipment.

However, the prior art equipment is placed outdoors, and the outdoor direct sunlight causes the temperature of the closed cooling tower to rise, so that the closed cooling tower is inconvenient to ventilate, thereby causing the pipeline to generate heat, affecting the operation of the equipment, and when the wind sand is large, the closed cooling tower is inconvenient to clean the dust, causing the dust to enter the pipeline, blocking the pipeline of the system, and affecting the normal operation of the system.

In view of the above problems with the prior art, there is a need for a dust guard for closed cooling tower ventilation that maintains continuous ventilation and facilitates dust removal.

Disclosure of Invention

In order to overcome the defects of heat generation of a pipeline and inconvenience in dust cleaning caused by inconvenient ventilation in the prior art, the invention has the technical problems that: the dustproof device for the ventilation of the closed cooling tower can keep continuous ventilation and is convenient for cleaning dust.

The technical scheme is as follows: a dust keeper for closed cooling tower ventilation, including: the cooling tower comprises a closed cooling tower and an arc-shaped plate, wherein the arc-shaped plate is arranged at the upper part of the closed cooling tower; the clamping plates are symmetrically arranged on the left and right sides of the inner side of the arc plate; the clamping mechanism is arranged on the outer side of the arc-shaped plate; the ventilation mechanism is arranged on the arc-shaped plate.

Further, it is particularly preferable that the clamping mechanism includes: the outer sides of the arc plates are symmetrically provided with two pairs of connecting rods in a sliding manner; the fixture blocks are arranged between the inner sides of each pair of connecting rods and are matched with the closed cooling tower; the connecting blocks are arranged between the outer sides of each pair of connecting rods; first spring all is equipped with first spring between connecting block and the arc, and first spring all overlaps on the connecting rod.

Further, it is particularly preferable that the ventilation mechanism includes: the inner side of the upper part of the arc-shaped plate is provided with a bracket; the storage battery is placed in the bracket; the inner sides of the upper parts of the arc-shaped plates are symmetrically provided with supporting rods in the front and back direction, and the supporting rods are connected with a storage battery; the rotary seat is symmetrically arranged on the front and the back of the arc-shaped plate; the fans are rotatably arranged on the inner sides of the lower parts of the rotary bases and are connected with the supporting rods; solar panel, be equipped with solar panel between swivel mount upper portion.

Furthermore, it is particularly preferred that the shield assembly comprises: two fixing blocks are symmetrically arranged on the left and right sides of the inner side of the lower part of the arc plate; the lower parts of the fixed blocks are provided with second guide rods; two pairs of limiting blocks are symmetrically arranged on the left and right sides of the inner side of the lower part of the arc plate; the push rods are arranged on the lower portions of the second guide rods in a sliding mode and are connected with the limiting blocks in a sliding mode and matched with the clamping blocks; fourth springs are arranged between the push rod and the fixed block and are sleeved on the second guide rod; the protection net is arranged between the left side and the right side of the push rod on the same side of the protection net, and the protection net is matched with the upper portion of the closed cooling tower.

In addition, it is especially preferred that the dust removing device further comprises a dust removing component, wherein the dust removing component comprises: the arc guide rails are symmetrically arranged at the front and the back of the upper part of the arc plate; the lower part of the inner side of the arc-shaped plate is symmetrically provided with the connecting rods in the front-back direction; the first rotating shaft is symmetrically and rotatably arranged between the connecting rods; the rollers are rotationally arranged on the outer sides of the arc-shaped guide rails in a bilateral symmetry manner; the outer sides of the first rotating shafts are symmetrically provided with rotating rods in the front and back direction, and the inner sides of the rollers are also symmetrically provided with rotating rods in the front and back direction; the rotating rods on the inner side of the first guide rod are all provided with first guide rods in a sliding manner, and the first guide rods are all connected with the rotating rods on the inner side of the roller; the second springs are arranged between the rotating rods on the same side and are sleeved on the first guide rods; all gears are arranged on the front side of the first rotating shaft and are meshed with each other; the lower part of the front side of the connecting rod is provided with a rack in a sliding way, and the rack is meshed with the right full gear; the lower part of the front side of the supporting rod is provided with a planetary gear, the planetary gears are meshed with each other, and the planetary gear is connected with the fan at the front side; and a third spring is arranged between the lower part of the front side of the joint rod and the rack, and the third spring is sleeved on the joint rod.

In addition, it is particularly preferred that a clamping assembly is further included, and the clamping assembly includes: the inner sides of the push rods are respectively and rotatably provided with a second rotating shaft; the second rotating shaft is symmetrically provided with special-shaped blocks which are matched with the protective net; the torsional spring, all the symmetry is equipped with the torsional spring between dysmorphism piece and the push rod, and the torsional spring all overlaps in the second pivot.

In addition, especially preferred is still including spacing subassembly, and dust removal component lower part one side is equipped with spacing subassembly.

Furthermore, it is particularly preferred that the stopper member includes: the guide block is arranged at the lower part of the right front side of the connecting rod; the lower part of the guide block is provided with a sliding rod in a sliding way; the left side of the sliding rod is provided with a wedge block; a fifth spring is arranged between the wedge-shaped block and the guide block and sleeved on the sliding rod; a third guide rod is arranged at the lower part of the front side of the connecting rod in a sliding manner and is matched with the wedge-shaped block; and a sixth spring is arranged between the third guide rod and the connecting plate and sleeved on the third guide rod.

The beneficial effects are that: 1. the invention achieves the effects of keeping continuous ventilation and being convenient for cleaning dust.

2. According to the invention, the storage battery is manually opened, and the storage battery drives the fan to rotate through the support rod, so that the closed cooling tower can keep ventilation and does not generate heat, when the storage battery is in emergency and is out of power, the solar energy absorbed by the solar panel can timely supplement electric energy, the fan is continuously driven to rotate, and the effect of keeping continuous ventilation is achieved.

3. According to the invention, the convex part of the planet gear drives the rack to move downwards, and the rack can drive the rotating rod and the roller to rotate in the positive direction, so that the roller can clean dust on the upper part of the arc-shaped plate, and the effect of conveniently cleaning the dust is achieved.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a schematic perspective view of the clamping mechanism of the present invention.

Fig. 4 is a schematic perspective view of the ventilation mechanism of the present invention.

Fig. 5 is a schematic perspective view of a first dust-removing assembly according to the present invention.

Fig. 6 is a schematic perspective view of a second dust removing assembly according to the present invention.

Fig. 7 is a perspective view of the shield assembly of the present invention.

Fig. 8 is a partially enlarged perspective view of part a of the present invention.

Fig. 9 is a schematic perspective view of the spacing assembly of the present invention.

Fig. 10 is a partially enlarged perspective view of the portion B of the present invention.

Wherein the figures include the following reference numerals: 1. closed cooling tower, 2, arc-shaped plate, 3, clamping plate, 4, clamping mechanism, 41, connecting rod, 42, clamping block, 43, connecting block, 44, first spring, 5, ventilation mechanism, 51, bracket, 52, storage battery, 53, supporting rod, 54, swivel mount, 55, fan, 56, solar panel, 7, protective component, 71, fixed block, 72, second guiding rod, 73, fourth spring, 74, limiting block, 75, push rod, 76, protective screen, 6, dust removal component, 61, arc-shaped guide rail, 62, connecting rod, 63, first rotating shaft, 64, rotating rod, 65, first guiding rod, 66, second spring, 67, roller, 68, full gear, 69, rack, 610, planetary gear, 611, third spring, 8, clamping component, 81, second rotating shaft, 82, special-shaped block, 83, torsion spring, 9, limiting component, 91, guiding block, 92, sliding rod, 93, special-shaped block, 92, torsion spring, 9, limiting component, sliding rod, sliding block, 43, connecting block, 44, bracket, 52, storage battery, 53, bracket, and the like, A fifth spring 94, a wedge block 95, a third guide rod 96 and a sixth spring.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.

Example 1

The utility model provides a dust keeper for ventilation of closed cooling tower, as shown in figure 1, figure 2, figure 3, figure 4 and figure 7, including closed cooling tower 1, arc 2, cardboard 3, clamping mechanism 4 and ventilation mechanism 5, arc 2 has been placed on 1 upper portion of closed cooling tower, and 2 inboard bilateral symmetry of arc are equipped with two cardboard 3, and 2 outsides of arc are equipped with clamping mechanism 4, and clamping mechanism 4 cooperates with 1 of closed cooling tower, is equipped with ventilation mechanism 5 on the arc 2.

Clamping mechanism 4 is including connecting rod 41, fixture block 42, connecting block 43 and first spring 44, and the bilateral symmetry slidingtype in the 2 outsides of arc is equipped with two pairs of connecting rods 41, and every is equipped with fixture block 42 between every is to the connecting rod 41 inboard, and fixture block 42 and closed cooling tower 1 cooperate, every is equipped with connecting block 43 between every is to the connecting rod 41 outsides, all is equipped with first spring 44 between connecting block 43 and the arc 2, and first spring 44 all overlaps on connecting rod 41.

Ventilation mechanism 5 is including support 51, battery 52, bracing piece 53, swivel mount 54, fan 55 and solar panel 56, 2 upper portion inboards of arc are equipped with support 51, battery 52 has been placed in the support 51, 2 upper portion inboards front and back symmetries of arc are equipped with bracing piece 53, bracing piece 53 is connected with battery 52, the symmetry is equipped with swivel mount 54 around on the arc 2, the inboard equal rotary type in swivel mount 54 lower part is equipped with fan 55, fan 55 all is connected with bracing piece 53, be equipped with solar panel 56 between swivel mount 54 upper portion.

The protection assembly 7 comprises fixing blocks 71, second guide rods 72, fourth springs 73, limiting blocks 74, push rods 75 and protective nets 76, two fixing blocks 71 are arranged on the inner side of the lower portion of the arc-shaped plate 2 in a bilateral symmetry mode, the second guide rods 72 are arranged on the lower portions of the fixing blocks 71 in a bilateral symmetry mode, two pairs of limiting blocks 74 are arranged on the inner side of the lower portion of the arc-shaped plate 2 in a bilateral symmetry mode, push rods 75 are arranged on the lower portions of the second guide rods 72 in a sliding mode, the push rods 75 are connected with the limiting blocks 74 in a sliding mode, the push rods 75 are matched with the clamping blocks 42 in a matching mode, the fourth springs 73 are arranged between the push rods 75 and the fixing blocks 71 in a matching mode, the fourth springs 73 are sleeved on the second guide rods 72, the protective nets 76 are arranged between the push rods 75 on the same side, and the protective nets 76 are matched with the upper portions of the closed cooling tower 1.

When people need to prevent dust for the closed cooling tower 1, the device can be used, firstly, the arc plate 2 is placed on the closed cooling tower 1, the clamping plate 3, the protective net 76 and the push rod 75 can be in contact with the closed cooling tower 1 and then do not move downwards any more, then the arc plate 2 is manually pressed downwards, the arc plate 2 drives the second guide rod 72 to move downwards, the fourth spring 73 is compressed, the clamping block 42 can continue to move downwards, the push rod 75 drives the clamping block 42 to move inwards, the clamping block 42 drives the connecting rod 41 and the connecting block 43 to move inwards, the first spring 44 is compressed, the storage battery 52 can be opened after the clamping block 42 clamps the closed cooling tower 1, the storage battery 52 drives the fan 55 to rotate through the support rod 53, so that the closed cooling tower 1 can keep ventilation and no heating, when the storage battery 52 is powered off suddenly, the solar energy absorbed by the solar panel 56 can supplement electric energy in time, continue to drive fan 55 and rotate, when needing to clear up the dust on closed cooling tower 1 and the arc 2, alright in order to close battery 52, then manual outside pulling connecting block 43, connecting block 43 just can drive connecting rod 41 and fixture block 42 and move to the outside, fixture block 42 then no longer contacts with closed cooling tower 1, then loosen connecting block 43, upwards lifting with arc 2, cardboard 3, protection network 76 just no longer contacts with closed cooling tower 1 with push rod 75, it resets to drive second guide bar 72 and push rod 75 under fourth spring 73's reset action, push rod 75 just no longer drives fixture block 42 and moves to the inside, drive fixture block 42 under first spring 44's reset action, connecting rod 41 resets with connecting block 43, finally, people alright clear up the dust on arc 2 and the closed cooling tower 1 with beginning.

Example 2

On the basis of embodiment 1, as shown in fig. 5, 6, 8, 9 and 10, the dust removing device 6 further comprises a dust removing assembly 6, wherein the dust removing assembly 6 comprises an arc-shaped guide rail 61, a connecting rod 62, a first rotating shaft 63, a rotating rod 64, a first guide rod 65, a second spring 66, rollers 67, a full gear 68, a rack 69, a planetary gear 610 and a third spring 611, the arc-shaped guide rail 61 is symmetrically arranged at the front and back of the upper part of the arc-shaped plate 2, the connecting rods 62 are symmetrically arranged at the front and back of the lower part of the inner side of the arc-shaped plate 2, the first rotating shaft 63 is symmetrically and rotatably arranged between the connecting rods 62, the rollers 67 are symmetrically and rotatably arranged at the left and right outside of the arc-shaped guide rail 61, the rotating rods 64 are symmetrically arranged at the front and back outside of the first rotating shaft 63, the rotating rods 64 are also symmetrically arranged at the front and back inside of the rollers 67, the first guide rods 65 are slidably arranged on the rotating rods 64 at the inside, the first guide rods 65 are connected with the rotating rods 64 at the inner side of the rollers 67, second springs 66 are arranged between the rotating rods 64 on the same side, the second springs 66 are all sleeved on the first guide rod 65, full gears 68 are arranged on the front sides of the first rotating shafts 63, the full gears 68 are mutually meshed, racks 69 are arranged on the lower portion of the front side of the connecting rod 62 in a sliding mode, the racks 69 are meshed with the full gears 68 on the right side, planetary gears 610 are arranged on the lower portion of the front side of the supporting rod 53, the planetary gears 610 are mutually meshed, the planetary gears 610 are connected with the fan 55 on the front side, third springs 611 are arranged between the lower portion of the front side of the connecting rod 62 and the racks 69, and the third springs 611 are sleeved on the connecting rod 62.

When the fan 55 on the front side rotates to ventilate, the fan 55 rotates to drive the planetary gear 610 to rotate, when the convex part of the planetary gear 610 rotates to be in contact with the rack 69, the rack 69 is driven to move downwards, the third spring 611 is compressed, the rack 69 drives the full gear 68 to rotate forwards, so that the full gear 68 drives the first rotating shaft 63, the rotating rod 64 and the first guide rod 65 to rotate forwards, the rotating rod 64 drives the roller 67 to rotate forwards, the roller 67 cleans dust on the upper part of the arc-shaped plate 2, when the cylinder rotates to the upper part of the arc-shaped plate 2, the rotating rod 64 and the first guide rod 65 on the outer side move downwards, the second spring 66 is compressed, when the convex part of the planetary gear 610 is not in contact with the rack 69 any more, the rack 69 is driven to reset under the resetting action of the third spring 611, the rack 69 drives the full gear 68 to rotate backwards, the full gear 68 drives the first rotating shaft 63, The rotating rod 64 and the first guide rod 65 rotate reversely, so that the rotating rod 64 drives the roller 67 to rotate reversely, when the roller 67 rotates to the original state, the rotating rod 64 and the first guide rod 65 are driven to reset under the reset action of the second spring 66, and the roller 67 can continuously clean the upper part of the arc-shaped plate 2 in such a reciprocating manner.

Still including chucking subassembly 8, chucking subassembly 8 is equipped with second pivot 81 including second pivot 81, dysmorphism piece 82 and torsional spring 83, the equal rotary type in push rod 75 inboard, and the equal symmetry is equipped with dysmorphism piece 82 in the second pivot 81, and dysmorphism piece 82 all cooperates with protection network 76, and equal symmetry is equipped with torsional spring 83 between dysmorphism piece 82 and the push rod 75, and torsional spring 83 all overlaps on second pivot 81.

The limiting device is characterized by further comprising a limiting assembly 9, the limiting assembly 9 comprises a guide block 91, a sliding rod 92, a fifth spring 93, a wedge block 94, a third guide rod 95 and a sixth spring 96, the guide block 91 is arranged on the lower portion of the right front side of the connecting rod 62, the sliding rod 92 is arranged on the lower portion of the guide block 91 in a sliding mode, the wedge block 94 is arranged on the left side of the sliding rod 92, the fifth spring 93 is arranged between the wedge block 94 and the guide block 91, the fifth spring 93 is sleeved on the sliding rod 92, the third guide rod 95 is arranged on the lower portion of the front side of the connecting rod 62 in a sliding mode, the third guide rod 95 is matched with the wedge block 94, the sixth spring 96 is arranged between the third guide rod 95 and the connecting plate, and the sixth spring 96 is sleeved on the third guide rod 95.

When the protective net 76 is full of dust, the manual special-shaped block 82 rotates reversely, the special-shaped block 82 drives the second rotating shaft 81 to rotate reversely, at this time, the special-shaped block 82 is not in contact with the protective net 76 any more, the protective net 76 can be taken out for replacement, then the special-shaped block 82 is loosened, the torsion spring 83 in a deformation state drives the special-shaped block 82 and the second rotating shaft 81 to restore to the original state, the special-shaped block 82 can clamp the replaced protective net 76 continuously, when the upper part of the arc-shaped plate 2 does not need to be cleaned and the fan 55 continues to rotate, the protrusion of the planetary gear 610 drives the rack 69 to move downwards, people can push the slide rod 92 to the left manually, the slide rod 92 drives the wedge block 94 to move to the left, the fifth spring 93 is stretched, the wedge block 94 can clamp the rack 69 and then push the third guide rod 95 to the rear side, the sixth spring 96 is stretched, so that the third guide rod 95 clamps the wedge block 94, the rack 69 does not move upwards any more, when the unlocking is required, the third guide rod 95 is pulled to the front side manually, when the third guide rod 95 is not in contact with the wedge block 94, the third guide rod 95 is driven to reset under the reset action of the sixth spring 96, the wedge block 94 is driven to reset with the slide rod 92 under the reset action of the fifth spring 93, the wedge block 94 does not clamp the rack 69 any more, and the rack 69 can reset.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.