Asphalt flue gas collecting device

Abstract

The invention belongs to the technical field of pavement construction equipment, and provides an asphalt flue gas collecting device which comprises a top cover, a gas collecting assembly, a transmission part and a driving assembly, the asphalt flue gas collecting device is connected and mounted at the top of a paver through the top cover, the lower side of the asphalt flue gas collecting device corresponds to a hopper, and a plurality of gas collecting pipes capable of moving around an annular track groove are arranged on the lower side of the top cover; a plurality of gas collecting holes are formed in the side face of the gas collecting pipe from top to bottom, negative pressure can be effectively transmitted to the position near the hopper, smoke dissipation is reduced, the gas collecting pipes move around the annular rail groove, a dynamic negative pressure collecting barrier is formed, dissipated smoke can be continuously tracked and sucked, no collecting dead angle exists, and therefore the overall collecting efficiency is greatly improved. Meanwhile, compared with a transparent flexible cover which covers a large area, the gas collecting pipe has a smaller light blocking area and has smaller influence on the visual field; furthermore, the gas collecting pipe is driven by the driving assembly to continuously move, and the visual persistence effect of human eyes is utilized, so that the influence on the visual field can be further reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of road construction equipment, and specifically relates to an asphalt fume collection device. Background Technology

[0002] Asphalt pavers inevitably produce asphalt fumes when paving asphalt. The fumes produced by the mixture not only pollute the environment, but also contain a large number of carcinogens, making it difficult to guarantee the health of employees.

[0003] To collect asphalt fumes, some existing pavers have a collection hood installed above the hopper. This hood is connected to a negative pressure generator to create a negative pressure zone below it, thus collecting the fumes. To avoid obstructing the driver's view, the collection hood is usually positioned high, connected to the roof of the paver. This results in the hood being far from the hopper, leading to poor collection efficiency.

[0004] In addition, to overcome the above problems, some existing pavers have a flexible cover installed above the hopper. The top of the flexible cover is connected to the roof of the paver, and the bottom covers the hopper to reduce the escape of fumes and ensure effective collection. To avoid obstructing the driver's view, the flexible cover is made of transparent material.

[0005] However, the working environment of pavers is usually poor, and dirt easily adheres to the flexible cover. After a period of use, the dirt on the flexible cover will accumulate to a certain extent and still affect the driver's vision. Summary of the Invention

[0006] This invention provides an asphalt fume collection device, which aims to provide a collection device that has minimal impact on the driver's vision and has a good fume collection effect.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an asphalt fume collection device, comprising: A top cover is installed on the upper side of the paver's hopper and is fixedly connected to the top of the paver; an annular track groove is opened inside the top cover, and an annular negative pressure air chamber is provided on the upper side of the annular track groove; A gas collection assembly includes a flexible sealing ring and multiple gas collection pipes. The flexible sealing ring is sleeved within the annular negative pressure chamber and seals with the chamber. The flexible sealing ring has the freedom to slide circumferentially within the annular negative pressure chamber. The multiple gas collection pipes are spaced apart circumferentially along the flexible sealing ring. The gas collection pipes are vertically arranged, with their upper ends fixedly connected to the flexible sealing ring and communicating with the annular negative pressure chamber. Multiple gas collection holes are provided on the side of each gas collection pipe from top to bottom. The transmission component is slidably disposed in the annular track groove with its ends connected, and the air collection pipe passes through the transmission component and is connected to the flexible sealing ring. The drive assembly is connected to the top cover, and its power output end is connected to the transmission component. It is used to drive the transmission component to move circumferentially along the annular track groove, and to drive the flexible sealing ring and the air collection pipe to move circumferentially along the annular track groove.

[0008] In one possible implementation of the asphalt fume collection device provided by the present invention, the gas collecting pipe includes an inner pipe and an outer pipe. The upper end of the outer pipe is connected to the flexible sealing ring and spaced apart from the annular negative pressure chamber, and the lower end is closed. The inner pipe is disposed inside the outer pipe, and its upper end passes through the flexible sealing ring and communicates with the annular negative pressure chamber. A connecting hole is opened in the lower part of the inner pipe, and the gas collecting hole is opened on the outer pipe.

[0009] In one possible implementation of the asphalt fume collection device provided by the present invention, the distance between two adjacent gas collecting holes on the outer pipe gradually decreases from top to bottom.

[0010] In one possible implementation of the asphalt fume collection device provided by the present invention, multiple support rings are provided axially spaced inside both the outer pipe sidewall and the inner pipe sidewall.

[0011] In one possible implementation of the asphalt fume collection device provided by the present invention, the gas collection assembly further includes a retainer, which is a flexible annular frame disposed at the lower part of the outer tube, and the outer tube is connected to the retainer.

[0012] In one possible implementation of the asphalt fume collection device provided by the present invention, the gas collection assembly further includes a mounting frame and a lifting assembly. The mounting frame is a flexible annular frame connected to the upper part of the outer pipe. The lifting assembly is connected to the mounting frame, and the power output end is connected to the retainer.

[0013] In one possible implementation of the asphalt fume collection device provided by the present invention, the lifting assembly includes multiple lifting assemblies, which are spaced apart circumferentially along the annular track groove and are respectively connected to the mounting frame. A load-bearing rope is wound around the lifting assembly, and the load-bearing rope is fixedly connected to the retainer. The retainer is fixedly connected to the gas collection pipe.

[0014] In one possible implementation of the asphalt fume collection device provided by the present invention, the annular track groove is rectangular with rounded corners, and the annular negative pressure chamber matches the shape of the annular track groove.

[0015] In one possible implementation of the asphalt fume collection device provided by the present invention, the transmission component is a chain or a synchronous belt, the drive assembly includes a drive element and a plurality of drive wheels, the plurality of drive wheels are circumferentially spaced along the annular track groove and connected to the top cover, the drive wheels are driven in a transmission cooperation with the transmission component, the drive element is fixedly connected to the top cover, and the power output end is connected to the drive wheel to drive the drive wheel to rotate.

[0016] In one possible implementation of the asphalt fume collection device provided by the present invention, the drive assembly includes four drive wheels, which are respectively disposed on the inner sides of the four corners of the annular track groove.

[0017] The beneficial effects of the asphalt fume collection device provided by this invention are as follows: Compared with the prior art, the asphalt fume collection device provided by this invention is installed on the top of the paver through a top cover, with its lower side corresponding to the hopper. Multiple gas collection pipes that can move around a circular track groove are set on the lower side of the top cover. Multiple gas collection holes are opened on the side of the gas collection pipes from top to bottom, which can effectively transmit negative pressure to the vicinity of the hopper, reducing the escape of fume. Moreover, the movement of multiple gas collection pipes around the circular track groove forms a dynamic negative pressure collection barrier, covering the entire annular area above the hopper. It can continuously track and suck up the escaped fume, with no dead corners in collection, thereby greatly improving the overall collection efficiency. At the same time, compared with a large-area transparent flexible cover, the gas collection pipe itself has a smaller area of ​​light obstruction and less impact on the field of vision. Furthermore, the gas collection pipe moves continuously under the drive component, and by utilizing the persistence of vision of the human eye, the impact on the field of vision can be further reduced. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the asphalt fume collection device provided in Embodiment 1 of the present invention; Figure 2 This is a three-dimensional structural diagram of the asphalt fume collection device provided in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the main structure of the asphalt fume collection device provided in Embodiment 2 of the present invention; Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle; Figure 5 for Figure 4 Enlarged view of part A in the image; Figure 6 for Figure 4 Enlarged view of part B in the image; Figure 7 This is a schematic diagram of the main structure of the gas collection pipe in the asphalt fume collection device provided in an embodiment of the present invention; Figure 8 For along Figure 4 Cross-sectional view of the middle BB line; Figure 9 This is a three-dimensional structural diagram of the asphalt fume collection device provided in Embodiment 2 of the present invention assembled on a paver; Explanation of reference numerals in the attached figures: 10. Top cover; 11. Annular negative pressure air chamber; 12. Annular track groove; 13. Receiving platform; 21. Sealing ring; 22. Gas collecting pipe; 221. Inner pipe; 222. Outer pipe; 223. Connecting hole; 224. Air collection hole; 225. Support ring; 226. Connecting screw; 227. Nut; 23. Cage; 24. Mounting bracket; 25. Lifting assembly; 30. Transmission components; 41. Drive wheel; 42. Drive element; 50. Paver; 51. Hopper. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. 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.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0026] Please refer to the following: Figures 1 to 9The asphalt fume collection device provided by the present invention will now be described. The asphalt fume collection device includes a top cover 10, a gas collection assembly, a transmission component 30, and a drive assembly. The top cover 10 is mounted on the upper side of the hopper 51 of the paver 50 and is fixedly connected to the top of the paver 50. An annular track groove 12 is formed inside the top cover 10, and an annular negative pressure chamber 11 is provided on the upper side of the annular track groove 12. The gas collection assembly includes a flexible sealing ring 21 and multiple gas collection pipes 22. The flexible sealing ring 21 is fitted inside the annular negative pressure chamber 11 and is sealed to the annular negative pressure chamber 11. The flexible sealing ring 21 has a degree of freedom to slide circumferentially along the annular negative pressure chamber 11. The multiple gas collection pipes 22 slide circumferentially along the annular negative pressure chamber 11. Flexible sealing rings 21 are arranged circumferentially at intervals, and air collection pipes 22 are arranged vertically. The upper end of the flexible sealing rings 21 is fixedly connected to the upper end and communicates with the annular negative pressure air chamber 11. Multiple air collection holes 224 are opened on the side of the air collection pipes 22 from top to bottom. The transmission component 30 is slidably arranged in the annular track groove 12 with its head and tail connected. The air collection pipes 22 pass through the transmission component 30 and are connected to the flexible sealing rings 21. The drive component is connected to the top cover 10, and the power output end is connected to the transmission component 30 to drive the transmission component 30 to move circumferentially along the annular track groove 12, and drive the flexible sealing rings 21 and the air collection pipes 22 to move circumferentially along the annular track groove 12.

[0027] It should be noted that the top cover 10 has an upper cover plate on the upper side and a lower cover plate on the lower side. The annular negative pressure chamber 11 is open at the top, and the annular track groove 12 is open at the bottom. The upper cover plate is used to cover and close the top of the annular negative pressure chamber 11, and the lower cover plate is used to cover the bottom of the annular track groove 12 to facilitate the assembly of components such as the flexible sealing ring 21, the gas collecting pipe 22, and the transmission component 30. The lower cover plate has an avoidance ring groove to avoid the movement path of the gas collecting pipe 22.

[0028] The annular negative pressure chamber 11 is connected to a vacuum generator, fan or air pump or other device that can generate negative pressure through a pipeline, so that the annular negative pressure chamber 11 is in a negative pressure state, and then the asphalt fumes are collected through the gas collection pipe 22 and introduced into the corresponding treatment equipment.

[0029] like Figure 4 and Figure 5 As shown, the annular track groove 12 and the annular negative pressure air chamber 11 are connected, with a receiving platform 13 in the middle. The bottom of the flexible sealing ring 21 rests on the receiving platform 13. A lubricating layer or lubricating oil can be applied between the receiving platform 13 and the flexible sealing ring 21 to reduce friction. The air collecting pipe 22 is fixedly connected to the transmission component 30, and the transmission component 30 is suspended in the annular track groove 12, so that the transmission component 30 is spaced apart from both the annular track groove 12 and the receiving platform 13, and does not directly contact them, thereby reducing resistance.

[0030] like Figure 4 and Figure 5As shown, the flexible sealing ring 21 has a raised ridge on the side that contacts the annular negative pressure chamber 11 to reduce the contact area with the top cover 10 while ensuring sealing, thereby reducing friction. The flexible sealing ring 21 is made of elastic materials such as rubber and silicone, which can produce a certain deformation to adapt to shape changes during movement.

[0031] The gas collecting pipe 22 can be a rigid pipe or a flexible pipe. When the gas collecting pipe 22 is a flexible pipe, it has a radial support structure. The spacing between two adjacent gas collecting pipes 22 is set according to the actual situation to ensure the asphalt fume collection effect.

[0032] The beneficial effects of the asphalt fume collection device provided by the present invention are as follows: Compared with the prior art, the asphalt fume collection device provided by the present invention is connected to the top of the paver 50 through the top cover 10, and the lower side corresponds to the hopper 51. Multiple gas collection pipes 22 that can move around the annular track groove 12 are set on the lower side of the top cover 10. Multiple gas collection holes 224 are opened on the side of the gas collection pipes 22 from top to bottom, which can effectively transmit negative pressure to the vicinity of the hopper 51, reduce the emission of fume, and the multiple gas collection pipes 22 moving around the annular track groove 12 form a dynamic negative pressure collection barrier, covering the entire annular area above the hopper 51. It can continuously track and suck up the emission of fume, with no dead corners, thereby greatly improving the overall collection efficiency, significantly reducing the emission of carcinogens (such as benzo[a]pyrene) and other harmful substances into the working environment, greatly reducing the risk of these substances to the health of operators, and effectively protecting the health of employees.

[0033] Meanwhile, compared to a large-area transparent flexible cover, the air collection pipe 22 has a smaller area that blocks light and has less impact on the field of vision. Furthermore, the air collection pipe 22 moves continuously under the drive of the drive component. By utilizing the persistence of vision, the impact on the field of vision can be further reduced, allowing the driver to maintain a good observation of the working status of the hopper 51 for a long time. This greatly improves the safety of paving operations and reduces operational errors or safety accidents caused by blurred vision.

[0034] Furthermore, the gas collection pipe 22 moves continuously and slowly under the drive of the drive assembly. This dynamic characteristic makes it difficult for contaminants such as dust and oil to adhere and accumulate stably on the surface of the gas collection pipe 22 (in contrast, a static transparent cover is more likely to attract dirt and form a uniform layer of stains). Even when working under harsh conditions for a long time, it can maintain a relatively good level of cleanliness.

[0035] like Figure 6 and Figure 7As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the gas collecting pipe 22 includes an inner pipe 221 and an outer pipe 222. The upper end of the outer pipe 222 is connected to the flexible sealing ring 21 and spaced apart from the annular negative pressure chamber 11, and the lower end is closed. The inner pipe 221 is located inside the outer pipe 222, and its upper end passes through the flexible sealing ring 21 and communicates with the annular negative pressure chamber 11. A connecting hole 223 is opened at the lower part of the inner pipe 221, and a gas collecting hole 224 is opened on the outer pipe 222.

[0036] Specifically, the inner pipe 221 and the outer pipe 222 are spaced apart. The lower part of the inner pipe 221 refers to the position below the middle of the inner pipe 221 in the height direction. There are multiple connecting holes 223, which can be arranged at intervals along the axial and circumferential directions. The upper end of the inner pipe 221 is directly connected to the annular negative pressure chamber 11, establishing a direct negative pressure channel from the gas collecting hole 224 to the treatment system with less interference. This allows the suction force to act more concentratedly and effectively on the gas collecting area, reducing pressure loss during transmission. Therefore, the negative pressure can be effectively transmitted to the lower part of the gas collecting pipe 22, ensuring the negative pressure strength of the gas collecting hole 224 of the gas collecting pipe 22 near the hopper 51, thereby ensuring the gas collecting effect and reducing the escape of asphalt fumes.

[0037] As the first layer of structure directly exposed to the outside, the outer pipe 222 effectively protects the inner pipe 221 from direct heat radiation from the high-temperature asphalt mixture in the hopper 51, as well as from possible physical scratches or wear. This design extends the service life of the core gas transmission pipeline (i.e., the inner pipe 221) and improves the reliability of the entire collection device under harsh operating conditions.

[0038] Furthermore, the outer tube 222 is connected to the flexible sealing ring 21 using detachable methods such as snap-fit ​​or screw-fit, while the inner tube 221 is connected to the flexible sealing ring 21 using either detachable or non-detachable methods such as snap-fit, screw-fit, or adhesive. If the outer tube 222 becomes internally contaminated or damaged due to long-term use, it can be directly removed and replaced from the flexible ring without altering the core inner tube 221 and the annular negative pressure chamber 11, thus reducing maintenance costs.

[0039] like Figure 7 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the distance between two adjacent air collection holes 224 on the outer pipe 222 gradually decreases from top to bottom, that is, the density of the air collection holes 224 gradually increases from top to bottom, so as to effectively collect asphalt fume at the source, so that the asphalt fume diffuses upward as little as possible, thereby reducing the emission of fume and avoiding affecting the driver's vision.

[0040] like Figure 6 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, multiple support rings 225 are provided axially at intervals on both the side wall of the outer pipe 222 and the side wall of the inner pipe 221.

[0041] It should be noted that the inner tube 221 and the outer tube 222 are flexible tubes. The flexible tubes are supported by a support ring 225 as radial support to prevent the inner tube 221 and the outer tube 222 from closing under negative pressure, thereby maintaining good ventilation performance and ensuring the gas collection effect.

[0042] like Figure 2 and Figure 3 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the gas collection assembly further includes a retainer 23, which is a flexible annular frame located at the lower part of the outer tube 222, and the outer tube 222 is connected to the retainer 23.

[0043] It should be noted that the retainer 23 is made of elastic materials such as rubber and silicone, which can deform to adapt to shape changes during movement. All outer tubes 222 are connected to the retainer 23 to effectively maintain the spacing between the gas collecting tubes 22 and prevent the spacing between the gas collecting tubes 22 from fluctuating during movement, which would affect the gas collecting effect.

[0044] Furthermore, the cage 23 has a certain weight, which can effectively ensure the extension of the outer tube 222.

[0045] like Figure 2 and Figure 3 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the gas collection assembly further includes a mounting frame 24 and a lifting assembly. The mounting frame 24 is a flexible annular frame connected to the upper part of the outer pipe 222. The lifting assembly is connected to the mounting frame 24, and the power output end is connected to the retainer 23.

[0046] It should be noted that the mounting bracket 24 is made of materials with a certain degree of elasticity, such as rubber and silicone, which can produce a certain degree of deformation to adapt to shape changes during movement.

[0047] When filling the hopper 51 with asphalt material, the lifting assembly drives the retainer 23 to rise, which in turn causes the air collection pipe 22 to contract and move upward to make room for filling the material.

[0048] Furthermore, the inner tube 221 and the outer tube 222 are both rigid tubes at the top and bottom, and flexible tubes in the middle. The outer tube 222 is fixedly connected to the mounting bracket 24, the flexible sealing ring 21 and the transmission component 30 through the upper rigid tube, and is fixedly connected to the retainer 23 through the lower rigid tube. The inner tube 221 is connected to the flexible sealing ring 21 through the upper rigid tube, and is connected to the lower rigid tube of the outer tube 222 through the lower rigid tube.

[0049] like Figure 6As shown, specifically, a connecting screw 226 is fixed at the lower end of the inner tube 221. The connecting screw 226 passes through the lower end and is screwed to the nut 227, thereby fixing the lower end of the inner tube 221 and the lower end of the outer tube 222 together, so that a certain gap is maintained between the inner tube 221 and the outer tube 222 to ensure air circulation.

[0050] like Figure 2 and Figure 3 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the lifting assembly includes multiple lifting assemblies 25. The multiple lifting assemblies 25 are arranged circumferentially along the annular track groove 12 and are respectively connected to the mounting frame 24. The lifting assembly 25 is wound with a load-bearing rope, which is fixedly connected to the retainer 23. The retainer 23 is fixedly connected to the gas collection pipe 22.

[0051] It should be noted that the lifting assembly 25 is an existing mini winch, electric hoist, or other device capable of lifting objects of a certain mass.

[0052] Specifically, four lifting assemblies 25 are set up, and the four lifting assemblies 25 are set at equal intervals on the mounting frame 24 so that the cage 23 is subjected to more balanced forces.

[0053] In a specific embodiment of the asphalt fume collection device provided in this invention, the annular track groove 12 is rectangular with rounded corners, and the annular negative pressure chamber 11 matches the shape of the annular track groove 12.

[0054] It should be noted that the hopper 51 of the paver 50 is typically rectangular. Therefore, the annular track groove 12 is designed to be rectangular to better cover the hopper 51 with the negative pressure collection barrier formed by the air collection pipe 22, reducing the escape of flue gas. The rounded corners allow the chain or synchronous belt and other transmission components 30 to pass smoothly, reducing jamming. The matching shape of the annular negative pressure air chamber 11 and the annular track groove 12 ensures that the transmission component 30 can smoothly drive the flexible sealing ring 21 and the multiple air collection pipes 22 to move synchronously.

[0055] like Figure 8 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the transmission component 30 is a chain or a synchronous belt, and the drive assembly includes a drive element 42 and a plurality of drive wheels 41. The plurality of drive wheels 41 are arranged circumferentially along the annular track groove 12 and are connected to the top cover 10. The drive wheels 41 are driven by the transmission component 30. The drive element 42 is fixedly connected to the top cover 10, and the power output end is connected to the drive wheel 41 to drive the drive wheel 41 to rotate.

[0056] It should be noted that when the transmission component 30 is a chain, the drive wheel 41 is a sprocket; when the transmission component 30 is a synchronous belt, the drive wheel 41 is a synchronous pulley. The drive element 42 is an existing motor or an assembly of a motor and a reducer, and its power output end is connected to one of the drive wheels 41.

[0057] like Figure 2 and Figure 8 As shown, in a specific embodiment of the asphalt fume collection device provided in this invention, the drive assembly includes four drive wheels 41, which are respectively disposed on the inner sides of the four corners of the annular track groove 12.

[0058] It should be noted that drive wheels 41 are respectively provided on the inner side of the four corners of the annular track groove 12. The drive wheels 41 can effectively support the transmission component 30, reduce the friction between the transmission component 30 and the annular track groove 12 at the corners, and extend the service life.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An asphalt fume collection device, characterized in that, include: A top cover (10) is installed on the upper side of the hopper (51) of the paver (50) and is fixedly connected to the top of the paver (50); an annular track groove (12) is opened inside the top cover (10), and an annular negative pressure air chamber (11) is provided on the upper side of the annular track groove (12). The gas collection assembly includes a flexible sealing ring (21) and multiple gas collection pipes (22). The flexible sealing ring (21) is fitted inside the annular negative pressure chamber (11) and is sealed to the annular negative pressure chamber (11). The flexible sealing ring (21) has the freedom to slide along the circumference of the annular negative pressure chamber (11). The multiple gas collection pipes (22) are arranged at intervals along the circumference of the flexible sealing ring (21). The gas collection pipes (22) are arranged vertically, with their upper ends fixedly connected to the flexible sealing ring (21) and communicating with the annular negative pressure chamber (11). Multiple gas collection holes (224) are opened on the side of the gas collection pipes (22) from top to bottom. The transmission component (30) is slidably disposed in the annular track groove (12) with its ends connected. The air collection pipe (22) passes through the transmission component (30) and is connected to the flexible sealing ring (21). The drive assembly is connected to the top cover (10), and the power output end is connected to the transmission component (30) to drive the transmission component (30) to move circumferentially along the annular track groove (12), and drive the flexible sealing ring (21) and the air collection pipe (22) to move circumferentially along the annular track groove (12).

2. The asphalt fume collection device as described in claim 1, characterized in that, The gas collecting pipe (22) includes an inner pipe (221) and an outer pipe (222). The upper end of the outer pipe (222) is connected to the flexible sealing ring (21) and spaced apart from the annular negative pressure chamber (11), and the lower end is closed. The inner pipe (221) is located inside the outer pipe (222), and the upper end passes through the flexible sealing ring (21) and communicates with the annular negative pressure chamber (11). A connecting hole (223) is opened at the lower part of the inner pipe (221), and the gas collecting hole (224) is opened on the outer pipe (222).

3. The asphalt fume collection device as described in claim 2, characterized in that, The distance between two adjacent air collecting holes (224) on the outer tube (222) gradually decreases from top to bottom.

4. The asphalt fume collection device as described in claim 2, characterized in that, Multiple support rings (225) are provided axially at intervals on the side wall of the outer tube (222) and the side wall of the inner tube (221).

5. The asphalt fume collection device as described in claim 4, characterized in that, The gas collection assembly also includes a retainer (23), which is a flexible annular frame located at the lower part of the outer tube (222), and the outer tube (222) is connected to the retainer (23).

6. The asphalt fume collection device as described in claim 5, characterized in that, The gas collection assembly also includes a mounting frame (24) and a lifting assembly. The mounting frame (24) is a flexible ring frame connected to the upper part of the outer tube (222). The lifting assembly is connected to the mounting frame (24), and the power output end is connected to the retainer (23).

7. The asphalt fume collection device as described in claim 6, characterized in that, The lifting assembly includes multiple lifting components (25), which are spaced apart circumferentially along the annular track groove (12) and connected to the mounting frame (24) respectively. The lifting components (25) are wound with load-bearing ropes, which are fixedly connected to the retainer (23) and the retainer (23) is fixedly connected to the air collection pipe (22).

8. The asphalt fume collection device according to any one of claims 1-7, characterized in that, The annular track groove (12) is rectangular with rounded corners, and the annular negative pressure air chamber (11) matches the shape of the annular track groove (12).

9. The asphalt fume collection device as described in claim 8, characterized in that, The transmission component (30) is a chain or a synchronous belt. The drive assembly includes a drive element (42) and a plurality of drive wheels (41). The plurality of drive wheels (41) are arranged circumferentially along the annular track groove (12) and connected to the top cover (10). The drive wheels (41) are driven in conjunction with the transmission component (30). The drive element (42) is fixedly connected to the top cover (10). The power output end is connected to the drive wheel (41) to drive the drive wheel (41) to rotate.

10. The asphalt fume collection device as described in claim 9, characterized in that, The drive assembly includes four drive wheels (41), which are respectively located on the inner sides of the four corners of the annular track groove (12).

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