A gas separation device for building materials

By designing air collection components, filter circulation components, and automatic closing components, the problem of dust pollution during the transportation of building materials was solved, achieving effective dust separation and motor heat dissipation, thus protecting the environment and workers' health.

CN121846793BActive Publication Date: 2026-05-15SHANDONG JIN ZHICHENG CONSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG JIN ZHICHENG CONSTR CO LTD
Filing Date
2026-03-19
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Dust generated during the bulk transportation and unloading of building materials pollutes the environment, increases material loss, and threatens the health of loading and unloading workers. Existing equipment is difficult to effectively separate dispersed dust and dissipate heat from motors.

Method used

A gas separation device was designed, comprising a gas collection component, a filter circulation component, a drive component, a louver housing component, and an automatic closing component. By combining a curved impeller and a filter support, the airflow path is controlled to prevent dust from entering the motor and electrical control system. The louver component and the automatic closing component prevent dust from entering during bumps.

Benefits of technology

It effectively reduces dust concentration, protects the environment and workers' health, ensures that motor heat dissipation is not affected, prevents dust adhesion, and achieves automatic dust removal and anti-clogging functions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the technical field of gas dust separation, and particularly relates to a gas separation device for building materials, which comprises a gas collecting assembly, a filtering circulating assembly, a driving assembly, a louvered shell assembly, a louver assembly and an automatic closing assembly, the filtering circulating assembly is arranged in the gas collecting assembly, the driving assembly is arranged on the gas collecting assembly, and the louvered shell assembly is arranged on the driving assembly. By controlling the airflow path, the present application can make the airflow without dust heat the motor, and by the airflow collision, the external dust can be prevented from entering the interior through the heat dissipation holes. The present application further provides the louver assembly and the automatic closing assembly, by the abutment of the opening and closing control rod and the side of the carriage, the strip-shaped blades can be automatically kept closed when the door is closed, thereby solving the problem that the dust enters the driving assembly during transportation.
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Description

Technical Field

[0001] This invention belongs to the field of gas dust separation technology, specifically referring to a gas separation device for building materials. Background Technology

[0002] Currently, building materials (such as cement, lime, fly ash, etc.) are prone to generating high concentrations of dust during bulk transportation, unloading, and storage due to their high fluidity, fine particle size, and easy electrostatic adsorption.

[0003] In addition to bulk cargo transportation in cans, these materials are also often transported in bagged form using small vans. These open loading and unloading environments generate a lot of dust. High concentrations of dust not only pollute the environment and increase material loss, but also pose a threat to the health of loading and unloading workers.

[0004] To reduce dust concentration, this invention focuses on a device that separates dispersed dust and gas at the loading and unloading location through a circulating filtration process. Summary of the Invention

[0005] In response to the above situation, the present invention provides a gas separation device for building materials. After the double-hinged tailgate of the box truck is opened, it can automatically form a channel. By arranging this device on both sides of the channel, it can basically cover the entire dust area. However, the motor that drives the fan blades often needs to reserve heat dissipation holes, and the dispersed dust can easily enter the motor through the heat dissipation holes or adhere to the surface of the circuit board.

[0006] To address this problem, the present invention creatively proposes a filter circulation assembly. By controlling the airflow path, the dust-free airflow can be used to dissipate heat from the motor. Furthermore, by using airflow counter-current (gas is continuously discharged from the inside, preventing external dust from entering), external dust can be prevented from entering the interior through the heat dissipation holes.

[0007] Airflow counter-current can only prevent external dust from entering when the drive motor is working. During transportation, dust will also be dispersed inside the carriage due to bumps and other reasons. To further solve this problem, this invention also proposes a louver assembly and an automatic closing assembly. By abutting the opening and closing control lever against the side of the carriage, the strip blades can be automatically kept closed when the door is closed, thereby solving the problem of dust entering the drive assembly during transportation.

[0008] The technical solution adopted by the present invention is as follows: The present invention proposes a gas separation device for building materials, including a gas collection component, a filter circulation component, a drive component, a louver shell component, a louver window component, and an automatic closing component. The filter circulation component is disposed in the gas collection component, the drive component is disposed on the gas collection component, the louver shell component is disposed on the drive component, the louver window component is disposed on the louver shell component, and the automatic closing component is disposed on one side of the louver shell component.

[0009] The filter circulation assembly includes a curved impeller, which is rotatably mounted in the air collection assembly. The airflow generated by the rotation of the curved impeller can not only dissipate heat from the motor, but also prevent external dust from entering the motor and electrical control unit through the open heat dissipation vents.

[0010] By guiding and propelling the airflow through the curved impeller, the flow direction of the gas in the air collection cavity can be controlled, thereby solving the contradiction between the need for open window heat dissipation in the motor and the need to prevent dust from entering through the window and adhering to the motor and electronic control surfaces.

[0011] Furthermore, the filtration circulation assembly also includes a filter screen support and a filter element. The filter screen support is fixed in the air collection assembly, and the filter element is detachably disposed outside the filter screen support. The curved impeller is composed of a conical base plate and annularly distributed arc-shaped blades. When the curved impeller rotates, it can guide the airflow from the air collection assembly to the drive assembly.

[0012] The curved blades can draw the gas in the gas collection cavity toward the location of the curved impeller, thereby reducing the gas pressure in the gas collection cavity and absorbing the gas from the outside. The conical base plate can guide the gas flowing toward the curved impeller laterally, so that it enters the drive assembly.

[0013] Preferably, the filter circulation assembly further includes an elastic rod, which is fixed to the end of the arc-shaped blade. The filter screen support is provided with a support rib. When the elastic rod rotates, it can knock off the dust attached to the surface of the filter element by impacting the support rib.

[0014] The flexible rod is an optional accessory. Although it will increase the vibration and noise of the equipment during use, it enables the filter element to have automatic dust removal and anti-clogging functions. Users can choose to add it as needed.

[0015] Furthermore, the louver outer shell assembly includes a circular outer shell and a strip-shaped outer shell. The circular outer shell is disposed on the air collection assembly and has an open window portion. The strip-shaped outer shell is symmetrically disposed outside the circular outer shell.

[0016] Furthermore, the louver assembly includes a hinge base, a linkage seat, and strip blades. The hinge base is fixed to the circular outer shell, and the strip blades are arranged in an array. One side of each strip blade is hinged to the hinge base, and the other side of each strip blade is hinged to the linkage seat. The strip blades are kept relatively parallel to each other.

[0017] When the curved impeller rotates, the strip blades can automatically unfold under the push of the gas, thereby ensuring smooth airflow and heat dissipation of the motor.

[0018] Furthermore, the automatic closing assembly includes a sliding sleeve and an opening and closing control rod. The end of the linkage seat is provided with a contact top plate. The sliding sleeve is fixed to one end of the strip-shaped outer shell. The opening and closing control rod is engaged and slidably disposed in the sliding sleeve and the strip-shaped outer shell. The end of the opening and closing control rod is provided with an abutment joint that abuts against the carriage.

[0019] When the vehicle tailgate is closed, the abutment will press against the side of the compartment and push the linkage seat to move laterally, thereby forcing all the strip blades to close synchronously. This can prevent dust from spreading due to bumps during vehicle movement from entering the drive assembly through the louver assembly and attaching to electrical components.

[0020] Preferably, an elastic element is provided between the linkage seat and the circular outer shell.

[0021] Furthermore, the gas collection assembly includes a gas collection cavity, an air inlet window, and a detachable material box. The gas collection cavity is installed inside the tailgate of the vehicle compartment. An air inlet is provided on the edge of the gas collection cavity. The air inlet window is detachably mounted on the air inlet. The detachable material box is located at the bottom of the gas collection cavity.

[0022] The dust filtered by the filter cartridge falls into the removable material box. Since the removable material box is located in a corner of the air collection cavity where the airflow cannot reach, the collected dust will accumulate in the removable material box and be cleaned by the user regularly.

[0023] Preferably, the filter support is fixed in the air collection cavity, and the curved impeller is rotatably disposed in the air collection cavity.

[0024] Furthermore, the drive assembly includes a drive motor, a motor bracket, a flow channel, and an electronic control mounting plate. The flow channel is fixed to the air collection cavity, the motor bracket is disposed in the flow channel, the drive motor is disposed in the motor bracket, and the electronic control mounting plate is disposed on the flow channel.

[0025] The beneficial effects achieved by the present invention using the above structure are as follows:

[0026] (1) By guiding and pushing the airflow through the curved impeller, the flow direction of the gas in the gas collection cavity can be controlled, thereby solving the contradiction between the need for open window heat dissipation of the motor and the need to prevent dust from entering through the window and adhering to the motor and electrical control surfaces.

[0027] (2) The arc-shaped blades can gather the gas in the gas collection cavity toward the location of the curved impeller, thereby reducing the gas pressure in the gas collection cavity and absorbing the gas from the outside; the conical base plate can guide the gas flowing toward the curved impeller laterally and let it enter the drive assembly.

[0028] (3) The elastic rod is an optional accessory. Although it will increase the vibration and noise of the equipment, it enables the filter element to have the functions of automatic dust removal and anti-clogging. Users can choose to install it as needed.

[0029] (4) When the curved impeller rotates, the strip blades can automatically unfold under the push of the gas, thereby ensuring the smooth flow of air and the heat dissipation effect of the motor.

[0030] (5) When the vehicle tailgate is closed, the abutment will press against the side of the carriage and push the linkage seat to move laterally, thereby forcing all the strip blades to close synchronously. This can prevent dust that spreads due to bumps during vehicle movement from entering the drive assembly through the louver assembly and attaching to electrical components.

[0031] (6) The dust filtered by the filter element will fall into the removable material box. Since the removable material box is located in a corner of the air collection cavity where the airflow cannot reach, the collected dust will accumulate in the removable material box and be cleaned by the user regularly. Attached Figure Description

[0032] Figure 1 This is a perspective view of a gas separation device for building materials proposed in this invention;

[0033] Figure 2 This is a front view of a gas separation device for building materials proposed in this invention;

[0034] Figure 3 for Figure 2 A cross-sectional view along section line AA;

[0035] Figure 4 for Figure 2 A cross-sectional view along the cutting line BB;

[0036] Figure 5 for Figure 3 A cross-sectional view along the section line CC;

[0037] Figure 6 This is a schematic diagram of the exploded structure of a gas separation device for building materials proposed in this invention;

[0038] Figure 7 for Figure 3 A magnified view of a section at point I;

[0039] Figure 8 for Figure 3 Enlarged view of a section at point II;

[0040] Figure 9 for Figure 4 Enlarged view of a section at point III;

[0041] Figure 10 for Figure 6 A magnified view of a section at point IV;

[0042] Figure 11 for Figure 5 A magnified view of section V.

[0043] Among them, 1. Air collection assembly, 2. Filter circulation assembly, 3. Drive assembly, 4. Louver shell assembly, 5. Louver window assembly, 6. Automatic closing assembly, 11. Air collection cavity, 12. Air inlet window, 13. Detachable material box, 21. Filter screen bracket, 22. Filter element, 23. Curved impeller, 24. Elastic rod, 31. Drive motor, 32. Motor bracket, 33. Drainage channel, 34. Electrical control mounting plate, 41. Circular shell, 42. Strip shell, 51. Hinge base, 52. Linkage seat, 53. Strip blade, 61. Sliding sleeve, 62. Opening and closing control rod, 111. Air inlet, 211. Support rib, 231. Conical base plate, 232. Arc blade, 411. Window section, 521. Contact top plate, 621. Abutment joint.

[0044] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] like Figures 1-11 As shown, the present invention proposes a gas separation device for building materials, including a gas collection assembly 1, a filter circulation assembly 2, a drive assembly 3, a louver shell assembly 4, a louver window assembly 5, and an automatic closing assembly 6. The filter circulation assembly 2 is disposed in the gas collection assembly 1, the drive assembly 3 is disposed on the gas collection assembly 1, the louver shell assembly 4 is disposed on the drive assembly 3, the louver window assembly 5 is disposed on the louver shell assembly 4, and the automatic closing assembly 6 is disposed on one side of the louver shell assembly 4.

[0048] The filter circulation assembly 2 includes a curved impeller 23, which is rotatably disposed in the air collection assembly 1. The airflow generated by the rotation of the curved impeller 23 can not only dissipate heat for the motor, but also prevent external dust from entering the motor and electrical control through the open heat dissipation port.

[0049] By guiding and pushing the airflow through the curved impeller 23, the flow direction of the gas in the gas collection cavity 11 can be controlled, thereby solving the contradiction between the need for open window heat dissipation of the motor and the need to prevent dust from entering through the window and adhering to the motor and electrical control surfaces.

[0050] The filter circulation assembly 2 also includes a filter screen support 21 and a filter element 22. The filter screen support 21 is fixed in the air collection assembly 1, and the filter element 22 is detachably disposed outside the filter screen support 21. The curved impeller 23 is composed of a conical base plate 231 and annularly distributed arc blades 232. When the curved impeller 23 rotates, it can guide the airflow from the air collection assembly 1 to the drive assembly 3.

[0051] The arc-shaped blades 232 can concentrate the gas in the gas collecting cavity 11 toward the location of the curved impeller 23, thereby reducing the gas pressure in the gas collecting cavity 11 and absorbing the gas from the outside; the conical base plate 231 can guide the gas flowing toward the curved impeller 23 laterally, so that it enters the drive assembly 3.

[0052] The filter circulation assembly 2 also includes an elastic rod 24, which is fixed to the end of the arc-shaped blade 232. The filter support 21 is provided with a support rib 211. When the elastic rod 24 rotates, it can knock off the dust attached to the surface of the filter element 22 by hitting the support rib 211.

[0053] The elastic rod 24 is an optional accessory. Although it will increase the vibration and noise of the equipment during use, it enables the filter element 22 to have the functions of automatic dust removal and anti-clogging. Users can choose to install it as needed.

[0054] The louvered outer shell assembly 4 includes a circular outer shell 41 and a strip-shaped outer shell 42. The circular outer shell 41 is disposed on the air collection assembly 1 and has an opening portion 411. The strip-shaped outer shell 42 is symmetrically disposed outside the circular outer shell 41.

[0055] The venetian blind assembly 5 includes a hinge base 51, a linkage seat 52, and strip blades 53. The hinge base 51 is fixed to the circular outer shell 41. The strip blades 53 are arranged in an array. One side of the strip blades 53 is hinged to the hinge base 51, and the other side of the strip blades 53 is hinged to the linkage seat 52. The strip blades 53 are kept relatively parallel to each other.

[0056] When the curved impeller 23 rotates, the strip blades 53 can automatically unfold under the push of the gas, thereby ensuring smooth airflow and heat dissipation of the motor.

[0057] The automatic closing assembly 6 includes a sliding sleeve 61 and an opening and closing control rod 62. The end of the linkage seat 52 is provided with a contact top plate 521. The sliding sleeve 61 is fixed to one end of the strip-shaped outer shell 42. The opening and closing control rod 62 is engaged and slidably disposed in the sliding sleeve 61 and the strip-shaped outer shell 42. The end of the opening and closing control rod 62 is provided with an abutment joint 621 that abuts against the carriage.

[0058] When the vehicle tailgate is closed, the abutment 621 will press against the side of the vehicle compartment and push the linkage seat 52 to move laterally, thereby forcing all the strip blades 53 to close synchronously. This can prevent dust from spreading due to bumps during vehicle movement from entering the drive assembly 3 through the louver assembly 5 and attaching to electrical components.

[0059] An elastic element is provided between the linkage seat 52 and the circular outer shell 41.

[0060] The air collection assembly 1 includes an air collection cavity 11, an air inlet window 12, and a detachable material box 13. The air collection cavity 11 is installed inside the tailgate of the vehicle body. An air inlet 111 is provided on the edge of the air collection cavity 11. The air inlet window 12 is detachably provided on the air inlet 111. The detachable material box 13 is provided at the bottom of the air collection cavity 11.

[0061] The dust filtered by the filter element 22 will fall into the removable material box 13. Since the removable material box 13 is located in a corner of the air collection cavity 11 where the airflow cannot reach, the collected dust will accumulate in the removable material box 13 and be cleaned by the user regularly.

[0062] The filter support 21 is fixed in the air collection cavity 11, and the curved impeller 23 is rotatably disposed in the air collection cavity 11.

[0063] The drive assembly 3 includes a drive motor 31, a motor bracket 32, a flow channel 33, and an electrical control mounting plate 34. The flow channel 33 is fixed to the air collection cavity 11, the motor bracket 32 ​​is located in the flow channel 33, the drive motor 31 is located in the motor bracket 32, and the electrical control mounting plate 34 is located on the flow channel 33.

[0064] like Figure 3 As shown, the dashed lines with arrows indicate the gas flow path and direction.

[0065] In practical use, the user first needs to install the air collection cavity 11 on the inside of the tailgate of the truck body. The abutment joint 621 is located near the tailgate hinge. The tailgate of a box truck is generally a double-leaf swing door. Therefore, when the door is opened, the tailgate can form a passage located on both sides of the loading and unloading position.

[0066] When the tailgate is opened, the air intake 111 is located on both sides of the loading and unloading channel, and the effective area can almost cover the entire loading and unloading channel.

[0067] During loading and unloading, the drive motor 31 is started and drives the curved impeller 23 to rotate (the drive motor 31 can be powered by the vehicle battery). Through the rotating arc blades 232, the gas in the gas collection cavity 11 can be gathered towards the location of the curved impeller 23, thereby reducing the air pressure in the gas collection cavity 11, and allowing the outside gas to enter the gas collection cavity 11 through the air inlet window 12. The gas can enter the curved impeller 23 through the filter element 22, while the dust-like cement and lime will be blocked outside the filter element 22.

[0068] The conical base plate 231 can guide the gas flowing towards the curved impeller 23 laterally, so that it enters the flow channel 33. At this time, the air flowing through the drive motor 31 does not contain dust, which can both dissipate heat from the drive motor 31 and prevent dust from adhering to the surface of the electrical appliance.

[0069] Furthermore, because there is outward airflow in the drainage channel 33, even if the strip blade 53 is in the open state at this time, dust such as lime powder dispersed in the outside air will not enter the drainage channel 33.

[0070] When the tailgate is closed, the drive motor 31 is also turned off; the abutment 621 abuts against the side of the carriage and retracts into the sliding sleeve 61. During this process, the opening and closing control lever 62 pushes the linkage seat 52 to move laterally and drives the strip blade 53 to rotate and close. This can prevent dust that is spread due to bumps during vehicle movement from entering the drive assembly 3 through the louver assembly 5 and attaching to electrical components.

[0071] As another new embodiment of the present invention: the elastic rod 24 is an optional accessory. Although it will increase the vibration and noise of the equipment during use, it can enable the filter element 22 to have the functions of automatic dust removal and anti-clogging by vibrating and knocking the filter support 21. Users can choose to install it as needed.

[0072] As another new embodiment of the present invention: an elastic element can be provided between the linkage seat 52 and the circular outer shell 41. Different ways of providing the elastic element can enable the strip blade 53 to have different technical effects:

[0073] Option 1: No elastic element is provided between the linkage seat 52 and the circular outer shell 41. When the car door is closed, the sliding sleeve 61 can push the strip blade 53 to close. When the car door is opened, the strip blade 53 will not open automatically. When the drive motor 31 is started, the airflow will push the strip blade 53 open. When the drive motor 31 is turned off, the strip blade 53 will not close automatically.

[0074] Option 2: A small elastic element with a small elastic force is set between the linkage seat 52 and the circular outer shell 41, which can pull the strip blade 53 to close automatically. When the car door is closed, the sliding sleeve 61 can push the strip blade 53 to close. When the car door is opened, the strip blade 53 will not open automatically. When the drive motor 31 is started, the airflow will push the strip blade 53 open. When the drive motor 31 is turned off, the strip blade 53 will close automatically under the elastic force of the elastic element.

[0075] Option 3: An elastic element is provided between the linkage seat 52 and the circular outer shell 41 to push the strip blade 53 to open automatically. When the car door is closed, the sliding sleeve 61 can push the strip blade 53 to close. When the car door is opened, the strip blade 53 will open automatically. When the drive motor 31 is started, the strip blade 53 is already open. When the drive motor 31 is turned off, the strip blade 53 will not close automatically.

[0076] Of the three options, Option 1 offers the highest degree of freedom in manual adjustment, Option 2 is most suitable for normal working conditions, and Option 3 has the most stable function and is less prone to malfunctions such as jamming. Users can choose according to their needs.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0078] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A gas separation device for building materials, characterized in that: include: The system comprises a gas collection assembly (1), a filter circulation assembly (2), and a drive assembly (3), wherein the filter circulation assembly (2) is disposed within the gas collection assembly (1), and the drive assembly (3) is disposed on the gas collection assembly (1). The louver housing assembly (4), the louver window assembly (5), and the automatic closing assembly (6) are provided on the drive assembly (3), the louver window assembly (5) is provided on the louver housing assembly (4), and the automatic closing assembly (6) is provided on one side of the louver housing assembly (4). The gas collection assembly (1) includes a gas collection cavity (11), an air inlet window (12), and a detachable material box (13). The gas collection cavity (11) is installed inside the tailgate of the vehicle body. An air inlet (111) is provided on the edge of the gas collection cavity (11). The air inlet window (12) is detachably provided on the air inlet (111). The detachable material box (13) is provided at the bottom of the gas collection cavity (11). The filter circulation assembly (2) includes a curved impeller (23), a filter support (21) and a filter element (22). The curved impeller (23) is rotatably disposed in the air collection cavity (11). The filter support (21) is fixedly connected to the air collection cavity (11). The filter element (22) is detachably disposed outside the filter support (21). The curved impeller (23) is located inside the filter core (22) and consists of a conical base plate (231) and annularly distributed arc blades (232). When the curved impeller (23) rotates, it can guide the airflow from the air collection assembly (1) to the drive assembly (3) and discharge it through the louver assembly (5). The louvered outer shell assembly (4) includes a circular outer shell (41) and a strip-shaped outer shell (42). The circular outer shell (41) is disposed on the air collection assembly (1). The circular outer shell (41) is provided with an open window (411). The strip-shaped outer shell (42) is symmetrically disposed outside the circular outer shell (41). The louver assembly (5) includes a hinge base (51), a linkage seat (52), and strip blades (53). The hinge base (51) is fixed to the circular outer shell (41). The strip blades (53) are arranged in an array. One side of the strip blades (53) is hinged to the hinge base (51), and the other side of the strip blades (53) is hinged to the linkage seat (52). The strip blades (53) are kept relatively parallel to each other. The automatic closing assembly (6) includes a sliding sleeve (61) and an opening and closing control rod (62). The end of the linkage seat (52) is provided with a contact top plate (521). The sliding sleeve (61) is fixed to one end of the strip shell (42). The opening and closing control rod (62) is engaged and slidably disposed in the sliding sleeve (61) and the strip shell (42). The end of the opening and closing control rod (62) is provided with an abutment joint (621) that abuts against the carriage. When the vehicle tailgate is closed, the abutment joint (621) will abut against the side of the carriage and push the linkage seat (52) to move laterally, forcing all the strip blades (53) to close synchronously.

2. The gas separation device for building materials according to claim 1, characterized in that: The filter circulation assembly (2) also includes an elastic rod (24), which is fixed to the end of the arc-shaped blade (232). The filter support (21) is provided with a support rib (211). When the elastic rod (24) rotates, it can knock off the dust attached to the surface of the filter element (22) by hitting the support rib (211).

3. A gas separation device for building materials according to claim 2, characterized in that: An elastic element is provided between the linkage seat (52) and the circular outer shell (41).

4. A gas separation device for building materials according to claim 3, characterized in that: The drive assembly (3) includes a drive motor (31), a motor bracket (32), a flow channel (33), and an electrical control mounting plate (34). The flow channel (33) is fixed to the gas collection cavity (11), the motor bracket (32) is located in the flow channel (33), the drive motor (31) is located in the motor bracket (32), and the electrical control mounting plate (34) is located on the flow channel (33).