Equipment for firing foamed ceramic by using fly ash

Abstract

The invention relates to the technical field of foamed ceramic production, in particular to equipment for firing foamed ceramics by using fly ash, a heating plate is arranged above an electric conveyor belt I, so that powder can be preheated through the heating plate when the electric conveyor belt I conveys the powder, a preheating system does not need to be arranged in front of a heating kiln, and the production efficiency is improved. Meanwhile, mixed powder which is located on the edge and far away from the heating plate is guided to the middle through the first flow guide block, the heating plate heats the mixed powder, and the problem that preheating is insufficient due to the fact that the distance between the powder on the edge and the heating plate is too far is solved; the invention discloses equipment for firing foamed ceramics by utilizing fly ash. The equipment comprises a heating plate, a flow guide cover, a flow guide block II, a heating piece and a bearing assembly, a plurality of heating plates are fixedly connected to the lower side of the cover plate; a gap is formed between every two adjacent heating plates; a flow guide cover is fixedly connected to the fixing part of the first electric conveying belt and connected with the cover plate. An opening is formed in the flow guide cover.

Description

Technical Field

[0001] The present invention relates to the technical field of foamed ceramic production, and more specifically, to a device for firing foamed ceramics using fly ash. Background Art

[0002] Fly ash is fine particles produced during the combustion process, mainly composed of inorganic and organic matter. Fly ash can be used to prepare foamed ceramics, which is beneficial to improve resource utilization; When existing equipment uses fly ash to prepare foamed ceramics, the fly ash is first mixed into the raw materials to obtain a mixed powder, and then the mixed powder is spread into a mold through a conveyor belt. The mold is then moved to a heating kiln for heating and foaming operations. However, the existing distribution system does not have a preheating function, which makes the heating time of the mixed powder in the heating kiln relatively long, resulting in low foaming efficiency. If a preheating system is set in front of the heating kiln, the preheating system will occupy a large amount of factory space. Summary of the invention

[0003] In order to overcome the disadvantage that the existing material distribution system does not have a preheating function, resulting in low foaming efficiency, and if a preheating system is set in front of the heating kiln, the preheating system will occupy a large amount of factory space, the present invention provides a device for firing foamed ceramics using fly ash.

[0004] The technical solution of the present invention is: A device for firing foamed ceramics using fly ash, comprising an electric conveyor belt and a cover plate; the cover plate is connected to the electric conveyor belt; it also comprises a heating plate, a guide cover, guide blocks 2, a heating element and a receiving assembly; a plurality of heating plates are fixedly connected to the lower side of the cover plate; a gap is formed between every two adjacent heating plates; a guide cover is fixedly connected to the fixed part of the electric conveyor belt, and the guide cover is connected to the cover plate; an opening is provided on the guide cover; a receiving assembly is arranged under the guide cover, and the receiving assembly is used to receive raw materials; a plurality of guide blocks 2 are fixedly connected to each heating plate, and each row of guide blocks 2 are alternately arranged up and down; a heating element is connected to the electric conveyor belt, and the heating element is used to heat the belt portion of the electric conveyor belt.

[0005] Furthermore, the guide block 2 is configured to be made of a heat-conducting material.

[0006] Furthermore, the receiving component includes an electric conveyor belt 2 and a mold; the electric conveyor belt 2 is arranged below the air deflector; and the mold is placed on the electric conveyor belt 2.

[0007] Furthermore, it also includes a guide block 1; a guide block 1 which is set obliquely is fixedly connected to the heating plates at both ends.

[0008] Furthermore, the width of the gaps on both sides of the electric conveyor belt is greater than the width of the gaps in the middle of the electric conveyor belt.

[0009] Furthermore, it also includes a guide block three; a guide block three is fixedly connected to all the guide blocks two located on the inner side of the gaps at both ends.

[0010] Furthermore, the heating element is configured as a heating strip; a gap is formed between the heating plate and the electric conveyor belt; the conveyor belt of the electric conveyor belt consists of a thermal insulation belt portion and a thermal conductive silicone portion, and the thermal conductive silicone portion is fixedly connected to the outer side of the thermal insulation belt portion; a number of heating strips are fixedly connected between the thermal insulation belt portion and the thermal conductive silicone portion.

[0011] Furthermore, it also includes a toggle assembly; the toggle assembly is connected to the electric conveyor belt; the toggle assembly includes a round rod, a linkage block and an elastic telescopic rod; a plurality of round rods are fixedly connected to the electric conveyor belt; at least two linkage blocks are fixedly connected to the cover plate; the round rod cooperates with the linkage block; the cover plate is slidably connected to the electric conveyor belt; the cover plate is slidably connected to the air deflector; at least two elastic telescopic rods are fixedly connected to the air deflector, and the telescopic ends of the elastic telescopic rods are fixedly connected to the cover plate.

[0012] Furthermore, it also includes a limiting block; a limiting block is fixedly connected between each guide block 2 and the corresponding heating plate.

[0013] Furthermore, it also includes a shaking component; the shaking component is connected to the air deflector; the shaking component includes a long rod, two round rods and two linkage blocks; at least two long rods are rotatably connected to the air deflector through a torsion spring shaft; all the long rods are commonly fixedly connected to the two round rods, and the two round rods are located on the inner side of the opening; each long rod is fixedly connected to a two linkage blocks; the two linkage blocks cooperate with the one linkage block.

[0014] The beneficial effects are: First, by arranging a heating plate above the electric conveyor belt, the electric conveyor belt can preheat the powder through the heating plate when conveying the powder, and there is no need to set up a preheating system in front of the heating kiln, which saves plant space. At the same time, the mixed powder located at the edge and far away from the heating plate is guided to the middle by the guide block, so that the heating plate heats this part of the mixed powder, avoiding the problem of insufficient preheating caused by the edge powder being too far away from the heating plate. At the same time, the gap between the front and the rear is set wider to accommodate more mixed powder, avoiding blockage and overflow, so as to ensure the orderly transportation of the mixed powder. At the same time, the two pairs of guide blocks arranged crosswise and symmetrically are used. The mixed powder is redirected and guided multiple times, so that the mixed powder in the gap is stirred evenly, thereby improving the preheating effect of the mixed powder. At the same time, the guide block 2 and the guide block 3 cooperate to redirect the mixed powder together to ensure the diversion effect, avoiding the problem that the guide block 2 has a low stirring effect on the mixed powder due to the relatively wide gaps at the front and the rear, which is conducive to ensuring the preheating effect of the mixed powder. At the same time, the guide block 1 located at the bottom tilts the lower layer of mixed powder and the upper layer of powder falls to the belt part of the electric conveyor belt 1, and the belt part heats this part of the mixed powder, thereby improving the preheating uniformity of the upper and lower layers of the mixed powder. Second, the bottom layer of the mixed powder is preheated by the heat-conducting silicone part, which avoids the problem of low preheating effect of the lower layer of mixed powder caused by the gap between the lower side of the heating plate and the electric conveyor belt; 3. The guide block 2 reciprocates to move the mixed powder in the gap to further stir the mixed powder evenly, further improving the preheating effect of the mixed powder, and through the cooperation of the round rod 1, the linkage block 1 and the elastic telescopic rod, the power of the electric conveyor belt 1 is used to drive the guide block 2 to perform reciprocating linear motion, without the need to set up additional electric drive parts, and the structure is ingenious. At the same time, the mixed powder is intercepted and limited by the limit block to prevent it from being stuck in the angle between the heating plate and the guide block 2 to avoid deterioration. At the same time, the linkage block 1 is also used to cooperate with the linkage block 2 to make the round rod 2 reciprocate to move the mixed powder at the opening, which is beneficial to the smoothness of the downward flow of the powder and avoids blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram of the structure of the device for firing foamed ceramics using fly ash of the present invention is shown; Figure 2 The structure diagram of the electric conveyor belt, the cover plate and the air guide cover of the present invention is shown; Figure 3 A top view of a device for firing foamed ceramics using fly ash according to the present invention is shown; Figure 4 The present invention is shown Figure 3 The enlarged view of point A in the middle; Figure 5 The structural schematic diagram of the guide block 2 of the present invention is shown; Figure 6 A right side view of the device for firing foamed ceramics using fly ash according to the present invention is shown; Figure 7 A schematic diagram of the structure of the heating strip of the present invention is shown; Figure 8 The schematic diagram of the structure of the toggle assembly of the present invention is shown.

[0016] In the accompanying drawings: 1-electric conveyor belt one, 2-cover plate, 3-heating plate, 4-guide cover, 201-electric conveyor belt two, 202-mold, 203-guide block one, 204-guide block two, 205-guide block three, 206-heating strip, 207-round rod one, 208-linkage block one, 209-elastic telescopic rod, 2010-limiting block, 2011-long rod, 2012-round rod two, 2013-linkage block two, 91-opening, 92-gap, 93-insulating belt part, 94-thermal conductive silicone part. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] Example 1 A device for firing foamed ceramics using fly ash, such as Figure 1-Figure 5 As shown, it includes an electric conveyor belt 1 and a cover plate 2; the electric conveyor belt 1 is connected to the cover plate 2, and the cover plate 2 is set to a heat-insulating material; it also includes a heating plate 3, a guide cover 4, a guide block 204, a heating element and a receiving assembly; ten heating plates 3 are bolted to the lower side of the cover plate 2; a gap 92 is formed between each two adjacent heating plates 3; the electric conveyor belt 1 is fixedly connected to the fixed part with a guide cover 4, and the guide cover 4 is connected to the cover plate 2; an opening 91 is opened on the guide cover 4; a receiving assembly is arranged below the guide cover 4; each heating plate 3 is fixedly connected to a plurality of guide blocks 204, and each row of guide blocks 204 are arranged alternately up and down; the electric conveyor belt 1 is connected to a heating element, and the heating element is used to heat the belt portion of the electric conveyor belt 1.

[0019] The guide block 204 is made of heat-conducting material.

[0020] The receiving component includes an electric conveyor belt 201 and a mold 202; the electric conveyor belt 201 is arranged below the air deflector 4; the mold 202 is placed on the electric conveyor belt 201, and the mold 202 is used to receive raw materials.

[0021] It also includes a guide block 203; a guide block 203 arranged obliquely is welded on each of the heating plates 3 at both ends, and the guide block 203 is used to guide the raw materials on both sides of the electric conveyor belt 1.

[0022] The width of the gaps 92 located at both sides of the electric conveyor belt 1 is greater than the width of the gap 92 located in the middle of the electric conveyor belt 1, so that the gaps 92 at both ends can accommodate more raw materials.

[0023] It also includes a guide block three 205; a guide block three 205 is welded to all the guide blocks two 204 located inside the gaps 92 at both ends.

[0024] First, the mixed powder is conveyed to the upper left part of the electric conveyor belt 1. In order to prevent the mixed powder from leaking from the front and rear sides of the electric conveyor belt 1, the mixed powder layer on the belt portion of the electric conveyor belt 1 should be away from the two edges of the belt portion. Then, the mixed powder is driven to move to the right by the electric conveyor belt 1, so that the mixed powder passes through the gap 92 and flows into the air guide cover 4, and then flows downward from the opening 91 of the air guide cover 4 into the mold 202. At this time, the mold 202 is driven to move slowly to the right by the electric conveyor belt 201, so that the mixed powder fills the mold 202. Then, the mold 202 filled with powder is transferred to the heating kiln for heating and foaming operation on the powder.

[0025] During the process of conveying the mixed powder by the electric conveyor belt 1, the heating plate 3 starts to generate heat by itself, and the mixed powder contacts the heating plate 3 when flowing through the gap 92, so that the heat on the heating plate 3 is transferred to the mixed powder, thereby heating the mixed powder. After preheating, the powder is filled into the mold 202, and then the mold 202 filled with the powder is transferred to the heating kiln for heating and foaming operation, which can greatly reduce the heating time of the powder in the heating kiln, thereby helping to improve the foaming efficiency of the mixed powder. When in use, by arranging the heating plate 3 above the electric conveyor belt 1, the powder can be preheated by the heating plate 3 when the electric conveyor belt 1 conveys the powder, and there is no need to arrange a preheating system in front of the heating kiln, saving factory space.

[0026] After the upper conveyor belt in the factory transports the mixed powder to the upper side of the electric conveyor belt 1, in order to prevent the mixed powder from falling off the edge of the electric conveyor belt 1, the mixed powder layer should be away from the edge of the electric conveyor belt 1. After the mixed powder falls from the upper conveyor belt to the electric conveyor belt 1, the edge position of the mixed powder layer formed on the electric conveyor belt 1 is uncertain, resulting in part of the powder at the edge of the mixed powder layer being too far away from the heating plate 3, resulting in the poor preheating effect of the heating plate 3 on this part of the mixed powder. Therefore, a guide block 203 is provided near the front and rear edges of the electric conveyor belt 1. When the electric conveyor belt 1 drives the mixed powder to move to the right, the mixed powder at the front and rear edges is guided to the middle by the guide block 203, and is guided to the front and rear gaps 92, and this part of the mixed powder is heated by the two front heating plates 3 and the two rear heating plates 3, thereby avoiding The problem of incomplete preheating of edge powder is solved. At the same time, during the transportation process, the heating element heats the belt portion of the electric conveyor belt 1. Since the guide blocks 203 are arranged alternately up and down, after the guide blocks 203 located at the lower part tilt the lower layer of mixed powder, the upper layer of powder will fall to the belt portion of the electric conveyor belt 1, and this part of the mixed powder will be heated by the belt portion, thereby improving the preheating uniformity of the upper and lower layers of the mixed powder. When in use, the mixed powder located at the edge and far away from the heating plate 3 is guided to the middle by the guide blocks 203, so that the heating plate 3 heats this part of the mixed powder, avoiding the problem of insufficient preheating caused by the edge powder being too far away from the heating plate 3. After the guide blocks 203 located at the lower part tilt the lower layer of mixed powder, the upper layer of powder will fall to the belt portion of the electric conveyor belt 1, and this part of the mixed powder will be heated by the belt portion, thereby improving the preheating uniformity of the upper and lower layers of the mixed powder.

[0027] When the guide block 203 guides the mixed powder at the edge to the frontmost and rearmost gaps 92, the frontmost and rearmost gaps 92 need to accommodate more mixed powder. Therefore, the frontmost and rearmost gaps 92 are set wider to accommodate more mixed powder to avoid blockage and overflow, thereby ensuring orderly transportation of the mixed powder.

[0028] When the mixed powder flows through the gap 92, the heating plate 3 has a poor heating effect on the mixed powder located in the middle of the gap 92. Therefore, a guide block 204 is set on the heating plate 3. When the mixed powder flows through the gap 92, the mixed powder is redirected and guided multiple times by the cross-symmetrically arranged guide blocks 204, so that the mixed powder in the gap 92 is evenly stirred, thereby improving the preheating effect of the mixed powder.

[0029] When the guide block 204 redirects the mixed powder, since the gap 92 at the front and the rear is relatively wide, the efficiency of the guide block 204 in redirecting the mixed powder in this gap 92 is relatively low. Therefore, a guide block 3 205 is set at the tail of the guide block 204 in this gap 92, and the guide block 204 and the guide block 3 205 cooperate to redirect the mixed powder together to ensure the diversion effect, thereby avoiding the problem of poor stirring effect of the mixed powder by the guide block 204 due to the relatively wide gap 92 at the front and the rear, which is beneficial to ensure the preheating effect of the mixed powder.

[0030] Example 2 On the basis of Example 1, Figure 6 and Figure 7 As shown, the heating element is configured as a heating strip 206; a gap is formed between the heating plate 3 and the electric conveyor belt 1; the conveyor belt of the electric conveyor belt 1 is composed of a heat-insulating belt portion 93 and a heat-conducting silicone portion 94, and the heat-conducting silicone portion 94 is fixedly connected to the outer side of the heat-insulating belt portion 93; a plurality of heating strips 206 are fixedly connected between the heat-insulating belt portion 93 and the heat-conducting silicone portion 94, and the heat-conducting silicone portion 94 is heated by the heating strips 206.

[0031] In the process of conveying powder by the electric conveyor belt 1, in order to reduce wear, a gap should be spaced between the lower side of the heating plate 3 and the electric conveyor belt 1, which leads to a poor preheating effect of the bottom layer of the mixed powder. Therefore, the conveyor belt of the electric conveyor belt 1 is divided into a heat-insulating belt portion 93 and a heat-conductive silicone portion 94, and the heat-conductive silicone portion 94 is heated by the heating strip 206, and the bottom layer of the mixed powder is preheated by the heat-conductive silicone portion 94, thereby avoiding the problem of poor preheating effect of the lower layer of mixed powder caused by the gap between the lower side of the heating plate 3 and the electric conveyor belt 1.

[0032] Example 3 On the basis of Example 2, Figure 8 As shown, it also includes a toggle assembly; the toggle assembly is connected to the electric conveyor belt 1; the toggle assembly includes a round rod 207, a linkage block 208 and an elastic telescopic rod 209; a plurality of round rods 207 are fixedly connected to the electric conveyor belt 1, and the round rods 207 are set to wear-resistant material; two linkage blocks 208 are welded on the cover plate 2; the cover plate 2 is slidably connected to the electric conveyor belt 1; the cover plate 2 is slidably connected to the air guide cover 4; two elastic telescopic rods 209 are fixedly connected to the air guide cover 4, and the telescopic ends of the elastic telescopic rods 209 are fixedly connected to the cover plate 2.

[0033] It also includes a limiting block 2010; a limiting block 2010 is fixedly connected between each guide block 204 and the corresponding heating plate 3, and the limiting block 2010 is used to limit the raw material.

[0034] It also includes a shaking component; the shaking component is connected to the air deflector 4; the shaking component includes a long rod 2011, a round rod 2012 and a linkage block 2013; the air deflector 4 is rotatably connected to two long rods 2011 through a torsion spring shaft, and the long rods 2011 are set to be made of alloy material; all the long rods 2011 are fixedly connected to the round rod 2012, and the round rod 2012 is located on the inner side of the opening 91; each long rod 2011 is welded with a linkage block 2013.

[0035] During the process of conveying the mixed powder by the electric conveyor belt 1, the electric conveyor belt 1 will also drive the round rod 207 to move, so that the round rod 207 moving to the right contacts the linkage block 208, and then the round rod 207 pushes the linkage block 208 to move to the right, and the linkage block 208 drives the cover plate 2 to move to the right and stretches the elastic telescopic rod 209. When the round rod 207 moves to the right end of the electric conveyor belt 1, it moves downward in an arc, so that the round rod 207 is separated from the linkage block 208. At this time, the elastic telescopic rod 209 rebounds and drives the cover plate 2 to move back to its original position, and then the other round rods 20 7 continuously cooperates with the linkage block 1 208 to make the cover plate 2 perform a small reciprocating motion, the cover plate 2 drives the heating plate 3 to perform a small reciprocating motion, the heating plate 3 drives the guide block 2 204 to perform a small reciprocating motion, so that the guide block 2 204 reciprocates to move the mixed powder in the gap 92, further stirs the mixed powder evenly, and further improves the preheating effect of the mixed powder. The round rod 1 207, the linkage block 1 208 and the elastic telescopic rod 209 cooperate to utilize the power of the electric conveyor belt 1 to drive the guide block 2 204 to perform reciprocating linear motion, without the need to set up additional electric drive components, and the structure is ingenious.

[0036] When the guide block 204 moves the mixed powder back and forth, part of the powder will be squeezed to the angle between the heating plate 3 and the guide block 204. Therefore, a limit block 2010 is set at the angle between the heating plate 3 and the guide block 204. Long-term accumulation is prone to deterioration. The mixed powder is intercepted and limited by the limit block 2010 to prevent it from being stuck in the angle between the heating plate 3 and the guide block 204, thereby avoiding deterioration caused by long-term accumulation of powder.

[0037] During the process of conveying the mixed powder by the electric conveyor belt 1, the electric conveyor belt 1 will also drive the round rod 1 207 to move. When the round rod 1 207 moves to the right end of the electric conveyor belt 1, the end of the round rod 1 207 contacts the linkage block 2013, and the round rod 1 207 continues to move to push the linkage block 2013 to move right, so that the linkage block 2013 drives the long rod 211 to rotate right around the torsion spring shaft thereon. After the round rod 1 207 passes through the linkage block 2013, the torsion spring shaft on the long rod 211 drives it to rotate back to its original position, and then the other round rods 1 207 is linked with the linkage block 2013 in turn to make the long rod 2011 swing back and forth, and the long rod 2011 drives the round rod 2012 to swing back and forth, so that the round rod 2012 reciprocates to move the mixed powder at the opening 91, which is beneficial to the smooth flow of the powder downward and avoids blockage. When in use, the linkage block 1 208 is also used to cooperate with the linkage block 2013 to make the round rod 2012 reciprocate to move the mixed powder at the opening 91, which is beneficial to the smooth flow of the powder downward and avoids blockage.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for firing foamed ceramics using fly ash, comprising an electric conveyor belt (1); a cover plate (2) is connected to the electric conveyor belt (1); the device is characterized in that: A plurality of heating plates (3) are fixedly connected to the lower side of the cover plate (2); a gap (92) is formed between each two adjacent heating plates (3); a guide cover (4) is fixedly connected to the fixed portion of the electric conveyor belt (1), and the guide cover (4) is connected to the cover plate (2); an opening (91) is provided on the guide cover (4); a receiving assembly is provided below the guide cover (4), and the receiving assembly is used to receive raw materials; a plurality of guide blocks (204) are fixedly connected to each heating plate (3), and each row of guide blocks (204) are alternately arranged up and down; a heating element is connected to the electric conveyor belt (1), and the heating element is used to heat the belt portion of the electric conveyor belt (1).

2. The device for firing foamed ceramics using fly ash according to claim 1, characterized in that: The guide block 2 (204) is made of a heat-conducting material.

3. The device for firing foamed ceramics using fly ash according to claim 2, characterized in that: The receiving component comprises a second electric conveyor belt (201); the second electric conveyor belt (201) is arranged below the air guide cover (4); and a mould (202) is placed on the second electric conveyor belt (201).

4. The device for firing foamed ceramics using fly ash according to claim 2, characterized in that: It also includes a guide block (203); a guide block (203) arranged in an inclined manner is fixedly connected to each of the heating plates (3) at both ends.

5. The device for firing foamed ceramics using fly ash according to claim 4, characterized in that: The width of the gaps (92) located on both sides of the electric conveyor belt (1) is greater than the width of the gap (92) located in the middle of the electric conveyor belt (1).

6. The device for firing foamed ceramics using fly ash according to claim 5, characterized in that: It also includes a guide block three (205); a guide block three (205) is fixedly connected to all the guide blocks two (204) located inside the gaps (92) at both ends.

7. The device for firing foamed ceramics using fly ash according to claim 6, characterized in that: The heating element is configured as a heating strip (206); a gap is formed between the heating plate (3) and the electric conveyor belt (1); the conveyor belt of the electric conveyor belt (1) is composed of a heat-insulating belt portion (93) and a heat-conducting silicone portion (94), and the heat-conducting silicone portion (94) is fixedly connected to the outside of the heat-insulating belt portion (93); a plurality of heating strips (206) are fixedly connected between the heat-insulating belt portion (93) and the heat-conducting silicone portion (94).

8. The device for firing foamed ceramics using fly ash according to claim 7, characterized in that: The invention also comprises a toggle assembly; the toggle assembly is connected to the electric conveyor belt 1 (1); the toggle assembly comprises a round rod 1 (207); a plurality of round rods 1 (207) are fixedly connected to the electric conveyor belt 1 (1); at least two linkage blocks 1 (208) are fixedly connected to the cover plate (2); the round rod 1 (207) and the linkage block 1 (208) cooperate with each other; the cover plate (2) is slidably connected to the electric conveyor belt 1 (1); the cover plate (2) is slidably connected to the air guide cover (4); at least two elastic telescopic rods (209) are fixedly connected to the air guide cover (4), and the telescopic ends of the elastic telescopic rods (209) are fixedly connected to the cover plate (2).

9. The device for firing foamed ceramics using fly ash according to claim 8, characterized in that: It also includes a limiting block (2010); a limiting block (2010) is fixedly connected between each second guide block (204) and the corresponding heating plate (3).

10. The device for firing foamed ceramics using fly ash according to any one of claims 8 to 9, characterized in that: The invention also comprises a shaking assembly; the shaking assembly is connected to the air deflector (4); the shaking assembly comprises a long rod (2011), a second round rod (2012) and a second linkage block (2013); the air deflector (4) is rotatably connected to at least two long rods (2011) via a torsion spring shaft; all the long rods (2011) are fixedly connected to the second round rod (2012), and the second round rod (2012) is located inside the opening (91); each long rod (2011) is fixedly connected to a second linkage block (2013); the second linkage block (2013) cooperates with the first linkage block (208).

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