Building material logistics warehouse ventilation device

Abstract

The utility model belongs to the technical field of logistics warehouse ventilation, and discloses a building material logistics warehouse ventilation device which comprises a box body, a vertically-arranged rotating shaft is rotationally arranged on a top plate of the box body, the bottom end of the rotating shaft extends into the box body and is provided with a first bevel gear, and the top end of the rotating shaft extends to the position above the top plate and is provided with a first worm gear; a driving shaft is rotationally arranged in the fixed pipe; a second bevel gear is arranged at one end of the driving shaft; a rotating disc is arranged at the other end of the driving shaft; a plurality of fan blades are arranged on the rotating disc in a circumferential array manner; the top plate of the box body is further provided with a first driving assembly for driving the rotating shaft to rotate and a second driving assembly for driving the rotating pipe to rotate. The fan blades can be driven to rotate through rotation of the rotating pipe, so that the plane where the fan blades are located is parallel to the air duct, enough space is formed in the air duct for natural ventilation, energy consumption is reduced, and the use cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation technology for logistics warehouses, and in particular to a ventilation device for building materials logistics warehouses. Background Technology

[0002] Logistics is the physical flow of goods from the supply location to the receiving location. It organically combines basic functions such as transportation, storage, loading and unloading, handling, packaging, distribution processing, delivery, recycling, and information processing according to actual needs. Building material logistics warehouses are used for temporary storage during the building material logistics process. Building materials (such as steel) require a dry environment for storage; a damp environment will cause the steel to rust, affecting its performance. Therefore, building material logistics warehouses need to be equipped with ventilation equipment to maintain a dry environment within the warehouse.

[0003] Currently, most warehouse ventilation equipment is installed on the warehouse walls, with fans inside. The rotation of the fan blades blows outdoor air into the warehouse to achieve gas exchange, thereby achieving the purpose of ventilation and drying. However, because the fan blades are located in the middle of the ventilation channel, and the circumferential array of the fan blades blocks most of the ventilation channel, the natural ventilation effect is poor. It is necessary to start the fan to drive the fan blades to rotate in order to ventilate, which increases energy consumption and operating costs. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a ventilation device for building materials logistics warehouses.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a ventilation device for a building materials logistics warehouse, comprising a horizontally arranged box with openings at both ends, a vertically arranged rotating shaft rotatably mounted on the top plate of the box, the bottom end of the rotating shaft extending into the box and equipped with a first helical gear, the top end extending above the top plate and equipped with a first worm gear, a rotating tube sleeved outside the rotating shaft also rotatably mounted inside the box, a 7-shaped bracket mounted on the rotating tube, one end of the 7-shaped bracket fixed to the rotating tube, and the other end equipped with a horizontally arranged fixed tube, a drive shaft rotatably mounted inside the fixed tube, a second helical gear mounted near the rotating shaft, and a rotating disk mounted away from the rotating shaft, a plurality of fan blades arranged in a circumferential array on the rotating disk, the second helical gear meshing with the first helical gear, and a first drive assembly for driving the rotating shaft to rotate and a second drive assembly for driving the rotating tube to rotate on the top plate of the box.

[0006] Furthermore, the first drive assembly includes two first vertical plates spaced apart on the top plate of the housing, and a first worm gear rotatably disposed between the two first vertical plates, the first worm gear cooperating with a first worm wheel.

[0007] Furthermore, the second drive assembly includes two second vertical plates spaced apart on the top plate of the housing, with a second worm gear rotatably disposed between the two second vertical plates. A vertically arranged transmission shaft is also rotatably disposed on the top plate of the housing. The bottom end of the transmission shaft extends into the housing and is provided with a first gear, while the top end extends above the top plate and is provided with a second worm wheel. The second worm gear cooperates with the second worm wheel. A second gear is disposed on the rotating tube, and the second gear meshes with the first gear.

[0008] Furthermore, the cores of the first worm and the second worm are arranged collinearly. A blind hole is formed inward at the end of the first worm near the second worm, and first protrusions are symmetrically arranged on the wall of the blind hole. A through hole is formed in the second worm along its length, and second protrusions are symmetrically arranged on the wall of the through hole. A sliding shaft is slidably disposed in the through hole, and third protrusions are symmetrically arranged on the shaft of the sliding shaft near the first worm. A connecting sleeve is disposed at the end of the sliding shaft away from the first worm, and several sliding grooves are formed on the wall of the connecting sleeve. A drive motor is disposed on the top plate of the housing at the end of the connecting sleeve away from the first worm. A connecting shaft is disposed on the output shaft of the drive motor, and sliding protrusions are disposed on the connecting shaft corresponding to the sliding grooves of the connecting sleeve. A sliding assembly for driving the connecting sleeve to slide horizontally is also disposed on the top plate of the housing.

[0009] Furthermore, the sliding assembly includes a third vertical plate disposed on the top plate of the housing, an electric push rod fixedly disposed on the third vertical plate, a connecting plate disposed at the push rod end of the electric push rod, a hole being formed on the connecting plate and a first bearing disposed in the hole, the outer ring of the first bearing being fixedly connected to the connecting plate and the inner ring being fixedly connected to the connecting sleeve.

[0010] Furthermore, a through hole is provided on the top plate of the housing for the rotating shaft to pass through. A second bearing is provided on the top surface of the top plate of the housing at the through hole. The outer ring of the second bearing is fixed to the top plate of the housing, and the inner ring is fixedly connected to the shaft body of the rotating shaft. A third bearing is provided on the bottom surface of the top plate of the housing at the through hole. The outer ring of the third bearing is fixed to the top plate of the housing, and the inner ring is fixedly connected to the rotating tube body.

[0011] Furthermore, a fourth bearing is provided at both ends of the rotating tube cavity, with the outer ring of the fourth bearing fixed to the wall of the rotating tube and the inner ring fixed to the shaft body of the rotating shaft.

[0012] Furthermore, protective nets are provided at both ends of the box.

[0013] In summary, this utility model has the following beneficial effects: In this application, by setting a rotating shaft, a rotating tube, a first helical gear, a second helical gear, a 7-shaped bracket, a fixed tube, a drive shaft, a rotating disk, and fan blades, the first and second helical gears mesh, causing the rotating shaft to rotate and drive the drive shaft to rotate, thereby driving the rotating disk and fan blades to rotate to achieve the purpose of ventilation; when the ventilation requirement is not high, the rotating tube can be driven to rotate 90°, thereby driving the drive shaft, rotating disk, and fan blades to rotate 90° via the 7-shaped bracket and fixed tube, so that the plane of the fan blades is parallel to the direction of the air duct. In this way, the fan blades will not block the air duct of the box, so that the air duct of the box has enough space for natural indoor and outdoor ventilation. In this way, natural ventilation can be carried out without electricity, reducing energy consumption and saving operating costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 3 yes Figure 2 Enlarged schematic diagram of part A;

[0017] Figure 4 This utility model embodiment is used to highlight a half-sectional schematic diagram of the internal structure;

[0018] Figure 5 This is a schematic diagram of the top structure of the housing in the state of the drive shaft rotating according to an embodiment of the present invention;

[0019] Figure 6 yes Figure 5 Enlarged schematic diagram of part B;

[0020] Figure 7 yes Figure 5 Enlarged schematic diagram of part C;

[0021] Figure 8 This is a schematic diagram of the top structure of the box in the state of the driven rotating tube rotating according to an embodiment of the present invention;

[0022] Figure 9 This is a schematic diagram of the fan blade position under natural ventilation conditions according to an embodiment of this utility model.

[0023] In the diagram: 10. Housing; 11. Through hole; 12. Second bearing; 13. Third bearing; 14. Protective net; 20. Rotating shaft; 21. First helical gear; 22. First worm gear; 30. Rotating tube; 31. L-shaped bracket; 32. Fixed tube; 33. Second gear; 34. Fourth bearing; 40. Drive shaft; 41. Second helical gear; 42. Rotating disk; 43. Fan blade; 50. First drive assembly; 51. First vertical plate; 52. First worm gear; 53. Blind hole; 54. First protrusion; 60. Second drive assembly; 61. Second vertical plate; 62. Second worm gear; 63. Drive shaft; 64. First gear; 65. Second worm wheel; 66. Through hole; 67. Second protrusion; 71. Sliding shaft; 72. Third protrusion; 73. Connecting sleeve; 74. Sliding groove; 80. Drive motor; 81. Connecting shaft; 82. Sliding protrusion; 90. Sliding assembly; 91. Third vertical plate; 92. Electric push rod; 93. Connecting plate; 94. First bearing. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figure 1-9 As shown in the figure, this application discloses a ventilation device for a building materials logistics warehouse, including a horizontally arranged box 10 with openings at both ends. The box 10 is horizontally installed on the wall of the warehouse or installed by a mounting bracket. The length direction of the box 10 is the direction of the air duct. One end of the box 10 is located outside the warehouse and the other end is located inside the warehouse. Both ends of the box 10 are provided with protective nets 14 to prevent foreign objects from entering the box 10 and damaging the internal components.

[0026] A vertically arranged rotating shaft 20 is rotatably mounted on the top plate of the housing 10, and a rotating tube 30 is also rotatably mounted inside the housing 10, sleeved outside the rotating shaft 20. Specifically, a through hole 11 is provided on the top plate of the housing 10 for the rotating shaft 20 to pass through. A second bearing 12 is provided on the top surface of the top plate of the housing 10 at the through hole 11. The second bearing 12 is coaxially arranged with the through hole 11, and the outer diameter of the second bearing 12 is larger than the diameter of the through hole 11, while the inner diameter is smaller than the diameter of the through hole 11. The outer ring of the second bearing 12 is fixed to the top plate of the housing 10, and the inner ring is fixedly connected to the shaft body of the rotating shaft 20, so that the rotating shaft is rotatably mounted on the top plate of the housing 10 through the second bearing 12. A third bearing 13 is provided on the bottom surface of the top plate of the housing 10 at the through hole 11. The third bearing 13 is arranged coaxially with the through hole 11, and the outer diameter of the third bearing 13 is larger than the diameter of the through hole 11, while the inner diameter is smaller than the diameter of the through hole 11. The outer ring of the third bearing 13 is fixed to the top plate of the housing 10, and the inner ring is fixedly connected to the body of the rotating tube 30. The inner diameter of the rotating tube 30 is larger than the diameter of the rotating shaft 20, so that the rotating tube 30 is rotatably installed in the housing 10 through the third bearing 13.

[0027] A further configuration involves providing fourth bearings 34 at both ends within the cavity of the rotating tube 30. The outer ring of the fourth bearing 34 is fixed to the wall of the rotating tube 30, and the inner ring is fixed to the shaft of the rotating shaft 20. The fourth bearings 34 allow the rotating tube 30 and the rotating shaft 20 to rotate relative to each other, while also providing mutual support to prevent the rotating tube 30 and the rotating shaft 20 from wobbling.

[0028] The bottom end of the rotating shaft 20 extends into the housing 10 and is equipped with a first helical gear 21, while the top end extends above the top plate and is equipped with a first worm gear 22. A first drive assembly 50 for driving the rotating shaft 20 is also provided on the top plate of the housing 10. The first drive assembly 50 includes two first vertical plates 51 spaced apart on the top plate of the housing 10. Bearings are provided on the first vertical plates 51, and a first worm 52 is positioned between the two first vertical plates 51. The two ends of the first worm 52 are rotatably mounted within the bearings of the two first vertical plates 51. The first worm 52 cooperates with the first worm gear 22, so driving the first worm 52 to rotate will drive the first worm gear 22 to rotate, thereby driving the rotating shaft 20 to rotate.

[0029] A 7-shaped bracket 31 is provided on the rotating tube 30. One end of the 7-shaped bracket 31 is fixed to the rotating tube 30, and the other end is provided with a horizontally arranged fixed tube 32. A drive shaft 40 is rotatably mounted inside the fixed tube 32 via bearings. Both ends of the drive shaft 40 extend out of the fixed tube 32. A second helical gear 41 is provided at the end of the drive shaft 40 near the rotating shaft 20. The second helical gear 41 meshes with the first helical gear 21. Thus, the rotation of the rotating shaft 20 drives the first helical gear 21 to rotate, which in turn drives the second helical gear 41 to drive the drive shaft 40 to rotate. A rotating disk 42 is provided at the end of the drive shaft 40 away from the rotating shaft 20. Several fan blades 43 are arranged in a circular array on the rotating disk 42. The rotation of the drive shaft 40 drives the rotating disk 42 and the fan blades 43 to rotate, thereby ventilating the inside of the housing 10.

[0030] A second drive assembly 60 for driving the rotating tube 30 is also provided on the top plate of the housing 10. The second drive assembly 60 includes two second vertical plates 61 spaced apart on the top plate of the housing 10. Bearings are provided on the second vertical plates 61, and a second worm gear 62 is provided between the two second vertical plates 61. The two ends of the second worm gear 62 are respectively rotatably mounted in the bearings of the two second vertical plates 61. A vertically arranged transmission shaft 63 is also rotatably mounted on the top plate of the housing 10 via bearings. The top end of the transmission shaft 63 extends above the top plate and is provided with a second worm wheel 65. The second worm gear 62 and the second worm wheel 65 cooperate with each other. The bottom end of the transmission shaft 63 extends into the housing 10 and is provided with a first gear 64. A second gear 33 is provided on the rotating tube 30, and the second gear 33 meshes with the first gear 64. The second worm gear 62 drives the second worm wheel 65 to rotate, which in turn drives the transmission shaft 63 and the first gear 64 to rotate, thereby driving the second gear 33 and the rotating tube 30 to rotate. When the rotating tube 30 rotates, it will drive the 7-shaped bracket 31 and the fixed tube 32 to rotate, which in turn drives the drive shaft 40 to rotate. The second helical gear 41 makes an arc-shaped movement on the circumference of the first helical gear 21, driving the moving plate and fan blade 43 to move to the side of the housing 10, providing sufficient space for natural ventilation of the air duct inside the housing 10.

[0031] In the setup, the cores of the first worm 52 and the second worm 62 are arranged collinearly. A blind hole 53 is formed inwardly at the end of the first worm 52 adjacent to the second worm 62, and first protrusions 54 are symmetrically arranged on the wall of the blind hole 53. A through hole 66 is formed along the length of the second worm 62, and second protrusions 67 are symmetrically arranged on the wall of the through hole 66. The diameter of the blind hole 53 is the same as the diameter of the through hole 66, and the heights of the first protrusions 54 and the second protrusions 67 are the same. A sliding shaft 71 is slidably installed in the through hole 66. The diameter of the sliding shaft 71 is smaller than the distance between the opposite end faces of the two second protrusions 67. A third protrusion 72 is symmetrically arranged on the shaft of the sliding shaft 71 on the side adjacent to the first worm 52. The length of the third protrusion 72 is the same as the length of the first protrusion 54, and the distance between the outer surfaces of the two third protrusions 72 is greater than the distance between the opposite end faces of the two second protrusions 67 but less than the diameter of the through hole 66. The length of the sliding shaft 71 is greater than the distance from the end of the second worm 62 away from the first worm 52 to the bottom of the blind hole 53. The sliding distance of the sliding shaft 71 is greater than the distance from the end of the second worm 62 near the first worm 52 to the bottom of the blind hole 53. A connecting sleeve 73 is provided at the end of the sliding shaft 71 away from the first worm 52, and the length of the connecting sleeve 73 is greater than the sliding distance of the sliding shaft 71. Several sliding grooves 74 are formed on the wall of the connecting sleeve 73. A drive motor 80 is provided on the top plate of the housing 10 at the end of the connecting sleeve 73 away from the first worm 52. A connecting shaft 81 is provided on the output shaft of the drive motor 80. A sliding protrusion 82 is provided on the connecting shaft 81 corresponding to the sliding groove 74 of the connecting sleeve 73. The lengths of the connecting shaft 81 and the sliding protrusion 82 must ensure that the sliding protrusion 82 will not fall out of the sliding groove 74 when the connecting sleeve 73 slides. The sliding protrusion 82 and the sliding groove 74 cooperate to limit the connecting sleeve 73 and the connecting shaft 81 in the circumferential direction, and the two rotate synchronously. The connecting sleeve 73 can also slide axially relative to the connecting shaft 81.

[0032] A sliding assembly 90 for driving the connecting sleeve 73 to slide horizontally is also provided on the top plate of the housing 10. The sliding assembly 90 includes a third vertical plate 91 set on the top plate of the housing 10, an electric push rod 92 fixedly mounted on the third vertical plate 91, and a connecting plate 93 set at the push end of the electric push rod 92. The connecting plate 93 has a hole and a first bearing 94 is set in the hole. The outer ring of the first bearing 94 is fixedly connected to the connecting plate 93, and the inner ring is fixedly connected to the connecting sleeve 73. By pushing and pulling the connecting plate 93 with the electric push rod 92, the connecting sleeve 73 is driven to slide horizontally, realizing the sliding of the connecting sleeve 73 on the connecting shaft 81. The setting of the first bearing 94 ensures that when the connecting shaft 81 drives the connecting sleeve 73 to rotate, it will not drive the connecting plate 93 to rotate, thereby ensuring the stability of the sliding assembly 90.

[0033] Its working principle is as follows: when it is necessary to drive the rotating shaft 20 to rotate, the electric push rod 92 pulls the connecting plate 93 to drive the connecting sleeve 73 to move closer to the second worm 62, pushing the sliding shaft 71 to move towards the first worm 52 until the end of the sliding shaft 71 extends into the bottom of the blind hole 53. Since the length of the third protrusion 72 is the same as the length of the first protrusion 54, the third protrusion 72 is completely placed in the blind hole 53 at this time. The drive motor 80 is started, and the connecting sleeve 73 and the sliding shaft 71 are driven to rotate through the connecting shaft 81. When the third protrusion 72 contacts the first protrusion 54, the sliding shaft 71 cooperates with the first worm 52. The sliding shaft 71 drives the first worm 52 to rotate synchronously, thereby driving the first worm wheel 22 and the rotating shaft 20 to rotate. Since the part of the sliding shaft 71 located in the through hole 66 does not have the third protrusion 72, the sliding shaft 71 does not contact the second worm 62, and the second worm 62 will not rotate.

[0034] When the rotating tube 30 needs to be driven to rotate, the electric push rod 92 pushes the connecting plate 93, causing the connecting sleeve 73 to move away from the second worm 62, pulling the sliding shaft 71 towards the second worm 62, so that the sliding shaft 71 is pulled out of the blind hole 53; the drive motor 80 is started, driving the connecting sleeve 73 and the sliding shaft 71 to rotate through the connecting shaft 81. When the third protrusion 72 contacts the second protrusion 67, the sliding shaft 71 engages with the second worm 62, and the sliding shaft 71 drives the second worm 62 to rotate synchronously, thereby driving the second worm wheel 65 and the transmission shaft 63 to rotate, which in turn drives the rotating tube 30 to rotate through the first gear 64 and the second gear 33. Since the sliding shaft 71 has disengaged from the blind hole 53 of the first worm 52, the first worm 52 will not rotate.

[0035] The arrangement of the first protrusion 54, the second protrusion 67, and the third protrusion 72 ensures that the sliding shaft 71 rotates synchronously with the first worm gear 52 and the second worm gear 62. Simultaneously, sufficient space is provided within the blind hole 53 and the through hole 66 for the third protrusion 72 to move, reducing the probability of axial collision between the third protrusion 72 and the first protrusion 54 and the second protrusion 67. To further ensure that the third protrusion 72 does not collide axially with the first protrusion 54 and the second protrusion 67 when the sliding shaft 71 slides, a control element is also provided to control the dwell angle of the sliding shaft 71 after the motor is turned off.

[0036] The operating principle of the ventilation device for a building materials logistics warehouse in this embodiment is as follows: When it is necessary to start the fan blade 43 for ventilation, the fan blade 43 is positioned on the cross-section of the air duct of the housing 10, that is, the length direction of the drive shaft 40 is consistent with the direction of the air duct. Then, the sliding shaft 71 is controlled to cooperate with the first worm gear 52 by the electric push rod 92, and the drive motor 80 is started to drive the rotating shaft 20 to rotate. The fan blade 43 is driven to rotate through the first helical gear 21, the second helical gear 41, the drive shaft 40, and the rotating disk 42 to achieve ventilation.

[0037] When high-volume ventilation is not required, the electric push rod 92 controls the sliding shaft 71 to cooperate with the second worm gear 62, starting the drive motor 80 to rotate the rotating tube 30. This rotates the 7-shaped bracket 31, fixed tube 32, drive shaft 40, rotating disk 42, and fan blades 43 by 90°, so that all fan blades 43 are located on the side of the air duct and the plane of all fan blades 43 is parallel to the direction of the air duct. This greatly reduces the area of ​​the fan blades 43 that obstructs the air duct, providing sufficient space for natural ventilation. In this way, warehouse ventilation can be achieved without turning on the motor, effectively reducing equipment energy consumption and saving operating costs.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A ventilation device for a building materials logistics warehouse, characterized in that: The enclosure includes a horizontally arranged box (10) with openings at both ends. A vertically arranged rotating shaft (20) is rotatably mounted on the top plate of the box (10). The bottom end of the rotating shaft (20) extends into the box (10) and is equipped with a first helical gear (21), while the top end extends above the top plate and is equipped with a first worm gear (22). A rotating tube (30) is also rotatably mounted inside the box (10) and fitted outside the rotating shaft (20). A 7-shaped bracket (31) is mounted on the rotating tube (30). One end of the 7-shaped bracket (31) is fixed to the rotating tube (30), and the other end is horizontally arranged. The fixed tube (32) has a drive shaft (40) rotatably mounted inside it. The drive shaft (40) has a second helical gear (41) at one end near the rotating shaft (20) and a rotating disk (42) at the other end away from the rotating shaft (20). Several fan blades (43) are arranged in a circular array on the rotating disk (42). The second helical gear (41) meshes with the first helical gear (21). The top plate of the box (10) is also provided with a first drive assembly (50) for driving the rotating shaft (20) to rotate and a second drive assembly (60) for driving the rotating tube (30) to rotate.

2. The ventilation device for a building materials logistics warehouse according to claim 1, characterized in that: The first drive assembly (50) includes two first vertical plates (51) spaced apart on the top plate of the housing (10), and a first worm gear (52) is rotatably disposed between the two first vertical plates (51), and the first worm gear (52) cooperates with a first worm wheel (22).

3. The ventilation device for a building materials logistics warehouse according to claim 2, characterized in that: The second drive assembly (60) includes two second vertical plates (61) spaced apart on the top plate of the housing (10), and a second worm gear (62) rotatably disposed between the two second vertical plates (61). A vertically arranged transmission shaft (63) is also rotatably disposed on the top plate of the housing (10). The bottom end of the transmission shaft (63) extends into the housing (10) and is provided with a first gear (64), and the top end extends above the top plate and is provided with a second worm wheel (65). The second worm gear (62) cooperates with the second worm wheel (65). A second gear (33) is disposed on the rotating tube (30), and the second gear (33) meshes with the first gear (64).

4. The ventilation device for a building materials logistics warehouse according to claim 3, characterized in that: The cores of the first worm (52) and the second worm (62) are arranged collinearly. A blind hole (53) is provided inward at the end of the first worm (52) near the second worm (62). A first protrusion (54) is symmetrically arranged on the wall of the blind hole (53). A through hole (66) is provided in the second worm (62) along its length. A second protrusion (67) is symmetrically arranged on the wall of the through hole (66). A sliding shaft (71) is slidably disposed in the through hole (66). A third protrusion (72) is symmetrically arranged on the shaft of the sliding shaft (71) on the side near the first worm (52). A connecting sleeve (73) is provided at the end of the shaft (71) away from the first worm (52). Several sliding grooves (74) are provided on the wall of the connecting sleeve (73). A drive motor (80) is provided on the top plate of the housing (10) at the end of the connecting sleeve (73) away from the first worm (52). A connecting shaft (81) is provided on the output shaft of the drive motor (80). A sliding protrusion (82) is provided on the connecting shaft (81) corresponding to the sliding groove (74) of the connecting sleeve (73). A sliding assembly (90) for driving the connecting sleeve (73) to slide horizontally is also provided on the top plate of the housing (10).

5. A ventilation device for a building materials logistics warehouse according to claim 4, characterized in that: The sliding assembly (90) includes a third vertical plate (91) set on the top plate of the housing (10). An electric push rod (92) is fixedly set on the third vertical plate (91). A connecting plate (93) is set at the push rod end of the electric push rod (92). A hole is opened on the connecting plate (93) and a first bearing (94) is set in the hole. The outer ring of the first bearing (94) is fixedly connected to the connecting plate (93) and the inner ring is fixedly connected to the connecting sleeve (73).

6. A ventilation device for a building materials logistics warehouse according to claim 1, characterized in that: The top plate of the housing (10) has a through hole (11) for the rotating shaft (20) to pass through. A second bearing (12) is provided on the top surface of the top plate of the housing (10) at the through hole (11). The outer ring of the second bearing (12) is fixed on the top plate of the housing (10), and the inner ring is fixedly connected to the shaft of the rotating shaft (20). A third bearing (13) is provided on the bottom surface of the top plate of the housing (10) at the through hole (11). The outer ring of the third bearing (13) is fixed on the top plate of the housing (10), and the inner ring is fixedly connected to the tube of the rotating tube (30).

7. A ventilation device for a building materials logistics warehouse according to claim 6, characterized in that: The rotating tube (30) has a fourth bearing (34) at both ends inside the tube cavity. The outer ring of the fourth bearing (34) is fixed to the tube wall of the rotating tube (30), and the inner ring is fixed to the shaft of the rotating shaft (20).

8. A ventilation device for a building materials logistics warehouse according to claim 1, characterized in that: Protective nets (14) are provided at both ends of the box (10).

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