Scraper for pipeline and pipeline dust removal device

Abstract

The utility model provides a scraper for a pipeline and a pipeline dust removal device, and the scraper comprises a dust removal structure which is in a circular ring shape and is used for scraping dust on the inner wall of the pipeline; the middle structure is used for being connected with a driving mechanism, and the dust removal structure is arranged around the middle structure; and the supporting structure is used for connecting the dust removal structure and the middle structure, and the first surface of the supporting structure is obliquely arranged relative to the inner wall of the pipeline. According to the scraper for the pipeline and the pipeline dust removal device provided by the utility model, the surface of the supporting structure for connecting the dust removal structure and the middle structure is obliquely arranged relative to the inner wall of the pipeline, so that when dust falls on the surface of the scraper, as the surface of the scraper is inclined, the dust slides down along the inclined surface; pipeline blockage caused by dust accumulation on the scraper is avoided, and the pipeline dust removal efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor manufacturing, in particular to a scraper for pipeline and pipeline dust removal device. BACKGROUND

[0002] The gas used or produced in the semiconductor production process is mostly toxic and can pollute the human environment. Therefore, before discharging these gases into the atmosphere, waste gas treatment equipment needs to be used for purification treatment.

[0003] Before treating waste gas, the dust carried by the waste gas and the condensed dust will adhere to the inner wall of the pipeline. Long time will cause the pipeline to be blocked, so that the gas flows not smoothly. In order to ensure that the exhaust is unobstructed, a scraper needs to be used to remove dust from the pipeline. However, during the process of scraping dust in the pipeline, some of the scraped dust will fall on the scraper, and the dust will accumulate on the scraper plane, causing the pipeline to be blocked. SUMMARY

[0004] Therefore, it is necessary to provide a scraper for pipeline and a pipeline dust removal device to at least avoid the accumulation of dust on the scraper plane and improve the pipeline dust removal efficiency.

[0005] To achieve the above-mentioned purposes and other related purposes, one aspect of the present application provides a scraper for pipeline, comprising:

[0006] A dust removal structure in the form of a circular ring is used to scrape the dust on the inner wall of the pipeline.

[0007] An intermediate structure is used to connect the driving mechanism, and the dust removal structure is arranged around the intermediate structure.

[0008] A support structure is used to connect the dust removal structure and the intermediate structure, and the first surface of the support structure is arranged inclined to the inner wall of the pipeline.

[0009] In one embodiment, the included angle between the first surface of the support structure and the surface of the pipeline ranges from 30° to 60°.

[0010] In one embodiment, the cross section of the scraper is in the form of a trapezoid, the cross section of the intermediate structure constitutes the upper base of the trapezoid, the cross section of the dust removal structure constitutes the lower base of the trapezoid, and the cross section of the support structure constitutes the waist of the trapezoid.

[0011] In one embodiment, the cross section size of the intermediate structure ranges from 10mm to 30mm, the cross section size of the dust removal structure ranges from 45mm to 65mm, and the height of the support structure ranges from 10mm to 20mm.

[0012] In one embodiment, the support structure further comprises a second surface opposite to the first surface, the first surface is close to the driving mechanism, the second surface is close to a dust outlet of the pipeline, and an included angle between the second surface and a surface of the pipeline ranges from 80° to 100°.

[0013] In one embodiment, the support structure is a hollow structure, so that the dust passes through the support structure.

[0014] In one embodiment, a friction coefficient of the first surface is less than a friction coefficient of an inner wall of the pipeline.

[0015] In one embodiment, the intermediate structure comprises an internal thread, so that the scraper is threadedly connected with the driving mechanism.

[0016] The utility model discloses a pipeline dust removal device on the other side still provides a kind of pipeline dust removal device, comprising:

[0017] Scraper, including the scraper for pipeline of any one of the above;

[0018] Driving mechanism, the driving mechanism is connected with the scraper, for driving the scraper moves in pipeline.

[0019] In one embodiment, the pipeline dust removal device further comprises:

[0020] Purging mechanism, for generating purging airflow, and the purging airflow is used to remove dust on the scraper.

[0021] According to the scraper for pipeline and the pipeline dust removal device provided by the utility model, the surface of the support structure connecting the dust removal structure and the intermediate structure is inclined relative to the inner wall of the pipeline, when the dust falls on the surface of the scraper, due to the inclination of the surface of the scraper, the dust slides along the inclined surface, avoids the dust accumulation on the scraper to cause pipeline blockage, improves the pipeline dust removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] To better describe and illustrate the embodiments and / or examples of those applications disclosed herein, reference can be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed applications, the presently described embodiments and / or examples, and the best mode presently understood of these applications.

[0023] Figure 1 It is a structural schematic diagram of scraper in prior art;

[0024] Figure 2 It is a schematic diagram of dust accumulation on the surface of scraper in prior art;

[0025] Figure 3Structure diagram of the scraper provided in an embodiment;

[0026] Figure 4 Front view of the scraper provided in an embodiment;

[0027] Figure 5 Diagram of dust sliding off the surface of the scraper provided in an embodiment;

[0028] Figure 6 Structure diagram of the pipeline dust removal device provided in an embodiment.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 100, scraper; 110, dust removal structure; 120, intermediate structure; 130, support structure; 200, driving mechanism; 300, blowing mechanism. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] It is to be noted that the diagrams provided in the embodiments only schematically illustrate the basic concepts of the present application, and the diagrams only show the components related to the present application, not the number, shape and size of the components in actual implementation. The shape, number and ratio of the components in actual implementation can be arbitrarily changed, and the layout of the components can be more complex.

[0035] The dust carried by the waste gas generated in the semiconductor production process and the condensed dust can adhere to the inner wall of the pipeline. Long time can cause pipeline blockage and make gas flow not smooth. In order to ensure that the exhaust is smooth, a scraper is needed to remove dust from the pipeline. The structure of the existing scraper is as shown in Figure 1 The surface of the scraper is a plane, so when the dust falls on the surface of the scraper, referring to Figure 2 The dust is easy to accumulate on the scraper plane, causing pipeline blockage.

[0036] To solve the above problems, the utility model provides a scraper for pipeline, as shown in Figures 3-4 It comprises:

[0037] The dust removal structure 110 is annular, which is used to scrape the dust on the inner wall of the pipeline;

[0038] The intermediate structure 120 is used to connect the driving mechanism, and the dust removal structure surrounds the intermediate structure;

[0039] The support structure 130 is used to connect the dust removal structure 110 and the intermediate structure 120, and the first surface of the support structure is inclined relative to the inner wall of the pipeline.

[0040] In one embodiment, the shape and size of the dust removal structure 110 are matched with the pipeline. Since the pipeline is usually circular, the dust removal structure 110 of the scraper for the pipeline adopts annular design, and the size of the dust removal structure 110 is slightly smaller than the size of the inner wall of the pipeline. For example, when the inner diameter of the pipeline is 80mm, the diameter of the dust removal structure 110 ranges from 45mm to 65mm, such as 45mm, 55mm and 65mm.

[0041] In one embodiment, since the scraper for the pipeline needs to reciprocate in the pipeline to remove dust from the pipeline, the scraper needs to be connected to the driving mechanism to drive the scraper to move in the pipeline. The structure for connecting the driving mechanism in the scraper is usually arranged in the middle of the dust removal structure 110, which is called the intermediate structure 120. Specifically, the intermediate structure 120 is arranged at the center point of the annular dust removal structure, so that the stress of the dust removal structure is uniform, the dust removal structure is prevented from being damaged, and the service life of the dust removal structure is prolonged.

[0042] In one embodiment, the intermediate structure 120 for connecting the driving mechanism is provided with a connecting structure, including but not limited to a threaded connecting structure, a buckle connecting structure, etc., to detachably connect the scraper 100 to the driving mechanism 200. Specifically, the intermediate structure 120 is provided with an internal thread, which can be matched and connected with an external thread provided on the plunger rod extended from the driving mechanism, to realize detachable connection of the scraper 100 and the driving mechanism 200.

[0043] In one embodiment, the dust removal structure 110 is connected with the intermediate structure 120 through the support structure 130 to form the overall structure of the scraper. The support structure 130, the dust removal structure 110, and the intermediate structure 120 can be connected with each other in a fixed connection manner, or the scraper 100 is made by an integral molding process, and the dust removal structure 110, the intermediate structure 120, and the support structure 130 are synchronously formed by the integral molding process.

[0044] Exemplarily, the support structure 130 is a hollow structure to allow the dust to pass through the support structure. In one embodiment, in order to allow the dust falling on the surface of the scraper to pass through the support structure 130, the support structure 130 cannot fill the space between the dust removal structure 110 and the intermediate structure 120, but needs to leave a space for the dust to pass through. For example, the support structure 130 adopts an overall structure provided with a plurality of through holes, which can be designed as circular, square or other shapes, and the dust passes through the support structure 130 via the through holes, as shown in Figure 5 Alternatively, the support structure 130 adopts a plurality of split structures, which connect different positions of the dust removal structure 110 and the intermediate structure 120 to realize the connection of the dust removal structure 110 and the intermediate structure 120. For example, the dust removal structure 110 and the intermediate structure 120 are connected by three support frames, the included angle of the three support frames is 120°, and the space between the three support frames is used to allow the dust to pass through the support structure 130.

[0045] In one embodiment, the support structure 130 includes two surfaces: a first surface (i.e., the upper surface) near the drive mechanism, i.e., away from the dust outlet of the pipe; and a second surface (i.e., the lower surface) near the dust outlet of the pipe. The angle between the first surface and the pipe surface ranges from 30° to 60°, for example, 30°, 45°, or 60°. By making the first surface (i.e., the upper surface) inclined relative to the inner wall of the pipe, when dust falls on the first surface, the dust can slide down along the inclined first surface (i.e., the upper surface), preventing dust accumulation on the first surface. Further, the angle between the second surface and the pipe surface ranges from 80° to 100°, for example, 80°, 90°, or 100°. By making the second surface (i.e., the lower surface) perpendicular relative to the inner wall of the pipe, when the scraper pushes the dust towards the dust outlet of the pipe, the dust is prevented from moving in the opposite direction (i.e., upward) along the inclined second surface or through the perforated structure of the support structure 130.

[0046] In one embodiment, since the dust removal structure 110 is typically arranged perpendicularly to the interior of the pipeline, when the first surface is inclined relative to the pipeline surface, the first surface of the support structure 130 is also inclined relative to the plane containing the dust removal structure 110. The angle between the first surface and the dust removal structure 110 ranges from 30° to 60°, for example, 30°, 45°, and 60°. The angle between the second surface and the dust removal structure 110 ranges from 0° to 10°, for example, 0°, 5°, and 10°.

[0047] In one embodiment, refer to Figure 2 As shown, the scraper has a trapezoidal cross-section. The cross-section of the intermediate structure 120 forms the upper base of the trapezoid, the cross-section of the dust removal structure 110 forms the lower base, and the cross-section of the support structure 130 forms the waist of the trapezoid. The cross-sectional dimensions of the intermediate structure 120 range from 10mm to 30mm, for example, 10mm, 20mm, and 30mm. When the cross-section of the intermediate structure 120 is circular, the cross-sectional dimensions represent the diameter of the cross-section. The cross-sectional dimensions of the dust removal structure 110 range from 45mm to 65mm, for example, 45mm, 55mm, and 65mm. When the cross-section of the dust removal structure 110 is circular, the cross-sectional dimensions represent the diameter of the cross-section. The height of the support structure 130 ranges from 10mm to 20mm, for example, 10mm, 15mm, and 20mm. The height of the support structure 130 is used to indicate the distance between the upper and lower bases of the trapezoid, i.e., the thickness of the scraper.

[0048] Exemplarily, the friction coefficient of the first surface is less than that of the inner wall of the pipeline. In one embodiment, the scraper is made of a material with a low friction coefficient to reduce the friction of the surface of the scraper, or the surface of the scraper is treated to reduce the friction of the surface of the scraper, so that the surface of the scraper is smooth, and when dust falls on the surface of the scraper, the dust can naturally slide along the surface of the scraper, avoiding the accumulation of dust on the scraper. In addition, due to the large temperature variation range in the pipeline, the scraper should be made of a material with good high-temperature resistance and thermal stability. Since the gas and dust formed in the pipeline can be corrosive, the scraper should also be made of a material resistant to corrosion. For example, the scraper is made of polytetrafluoroethylene (PTFE), which has good corrosion resistance and thermal stability, and the polytetrafluoroethylene (PTFE) has a low friction coefficient, so that the surface is non-stick and not easy to adsorb pollutants.

[0049] According to the scraper provided by the utility model, by making the surface of the support structure connecting the dust removal structure and the intermediate structure be inclined relative to the inner wall of the pipeline, when dust falls on the surface of the scraper, due to the inclination of the surface of the scraper, the dust slides along the inclined surface, avoiding the accumulation of dust on the scraper to cause pipeline blockage, and improving the pipeline dust removal efficiency.

[0050] The utility model also provides a pipeline dust removal device, as shown in Figure 6 The scraper 100 includes the above-mentioned scraper for the pipeline; the driving mechanism 200 is connected with the scraper 100 and is used for driving the scraper 100 to move in the pipeline. The blowing mechanism 300 is used for generating a blowing airflow, and the blowing airflow is used for removing dust on the scraper 100.

[0051] Exemplarily, the scraper 100 for the pipeline includes: a dust removal structure 110, which is annular and is used for scraping dust on the inner wall of the pipeline; an intermediate structure 120, which is used for connecting a driving mechanism, and the dust removal structure is arranged around the intermediate structure; a support structure 130, which is used for connecting the dust removal structure 110 and the intermediate structure 120, and a first surface of the support structure is arranged to be inclined relative to the inner wall of the pipeline.

[0052] In one embodiment, the shape and size of the dust removal structure 110 is matched with the pipeline. Since the pipeline is usually circular, the dust removal structure 110 of the scraper for the pipeline adopts a circular ring design, and the size of the dust removal structure 110 is slightly smaller than the inner wall size of the pipeline. Since the scraper for the pipeline needs to reciprocate in the pipeline for pipeline dust removal, the scraper needs to be connected to a driving mechanism to drive the scraper to move in the pipeline. The structure for connecting the driving mechanism in the scraper is usually arranged in the middle of the dust removal structure 110, which is called the middle structure 120. The middle structure 120 for connecting the driving mechanism is provided with a connecting structure which can detachably connect the scraper to the driving mechanism. The dust removal structure 110 and the middle structure 120 are connected by a support structure 130 to form the overall structure of the scraper. Among them, the support structure 130 is a hollow structure to allow dust to pass through the support structure.

[0053] In one embodiment, the support structure 130 includes two surfaces, wherein the first surface (i.e., the upper surface) is the surface close to the driving mechanism, that is, the surface away from the dust outlet of the pipeline, and the second surface (i.e., the lower surface) is the surface close to the dust outlet of the pipeline, wherein the included angle between the first surface and the surface of the pipeline ranges from 30° to 60°, for example, 30°, 45°, 60°. By arranging the first surface (i.e., the upper surface) to be inclined relative to the inner wall of the pipeline, when the dust falls on the first surface, the dust can slide along the inclined first surface (i.e., the upper surface), as shown in Figure 5 , avoiding the accumulation of dust on the first surface. Further, the included angle between the second surface and the surface of the pipeline ranges from 80° to 100°, for example, 80°, 90°, 100°. By arranging the second surface (i.e., the lower surface) to be perpendicular to the inner wall of the pipeline, when the scraper pushes the dust to move towards the dust outlet of the pipeline, the dust is prevented from moving in the opposite direction (i.e., upwards) along the inclined second surface or through the hollow structure of the support structure 130.

[0054] In one embodiment, since the dust removal structure 110 is usually arranged vertically inside the pipeline, when the first surface is arranged to be inclined relative to the surface of the pipeline, the first surface of the support structure 130 is also arranged to be inclined relative to the plane where the dust removal structure 110 is located. Among them, the included angle between the first surface and the dust removal structure 110 ranges from 30° to 60°, for example, 30°, 45°, 60°. The included angle between the second surface and the dust removal structure 110 ranges from 0° to 10°, for example, 0°, 5°, 10°.

[0055] In one embodiment, referring to Figure 2As shown, the scraper has a trapezoidal cross-section, wherein the cross-section of the intermediate structure 120 forms the upper base of the trapezoid, the cross-section of the dust removal structure 110 forms the lower base of the trapezoid, and the cross-section of the support structure 130 forms the waist of the trapezoid. The cross-sectional dimensions of the intermediate structure 120 range from 10mm to 30mm, for example, 10mm, 20mm, and 30mm. Since the cross-section of the intermediate structure 120 is circular, as... Figure 4 As shown, the cross-sectional dimensions of the intermediate structure 120 represent the diameter of its cross-section. The cross-sectional dimensions of the dust removal structure 110 range from 45mm to 65mm, for example, 45mm, 55mm, and 65mm. Since the cross-section of the dust removal structure 110 is circular, as... Figure 4 As shown, the cross-sectional dimension of the dust removal structure 110 represents the diameter of its cross-section. The height of the support structure 130 ranges from 10mm to 20mm, for example, 10mm, 15mm, or 20mm. The height of the support structure 130 represents the distance between the upper and lower bases of the trapezoid, i.e., the thickness of the scraper.

[0056] In one embodiment, the scraper is made of a material with a low coefficient of friction to reduce the friction on its surface. Alternatively, the scraper surface can be surface-treated to reduce friction, making it smooth so that dust can slide off naturally when it falls onto the scraper surface, preventing dust accumulation. Furthermore, due to the large temperature range within the pipeline, the scraper should be made of a material with high temperature resistance and good thermal stability. Since the gas and dust generated within the pipeline may be corrosive, the scraper should also be made of a corrosion-resistant material. For example, the scraper can be made of polytetrafluoroethylene (PTFE), which has good corrosion resistance and thermal stability, and its low coefficient of friction makes its surface non-stick and less prone to adsorbing contaminants.

[0057] In one embodiment, the drive mechanism 200 includes, but is not limited to, a plunger. The drive mechanism 200 is typically located outside the pipeline, and its extension extends into the pipeline to connect with the scraper. For example, the surface of the plunger extension rod is provided with external threads, and the plunger rod extends into the pipeline to match the internal threads provided on the intermediate structure 120 of the scraper 100, thus threading the plunger and scraper together and achieving a detachable connection between the drive mechanism 200 and the scraper. When the drive mechanism 200 is connected to the scraper, the scraper 100 can reciprocate within the pipeline under the drive of the drive mechanism 200 to remove dust. Specifically, when the drive mechanism 200 drives the scraper 100 to move away from the dust outlet of the pipeline (e.g., upwards), the dust removal structure 110 scrapes off the dust adhering to the inner wall of the pipeline. The dust falls onto the first surface of the scraper 100. Since the first surface is inclined relative to the inner wall of the pipeline, and the coefficient of friction of the first surface is lower than that of the inner wall of the pipeline, the dust slides down along the inclined first surface. Figure 5 As shown, dust accumulation on the scraper is prevented. When the drive mechanism 200 drives the scraper 100 to move towards the dust outlet of the pipe (e.g., downward), the dust removal structure 110 scrapes off the dust adhering to the inner wall of the pipe. The dust can usually fall under the action of gravity and will not accumulate in the pipe. Even if there is dust accumulation in the pipe, since the second surface of the scraper is perpendicular or nearly perpendicular to the inner wall of the pipe, the scraper can push the dust towards the dust outlet of the pipe, preventing the dust from moving in the opposite direction (i.e., upward) along the inclined second surface or through the hollow structure of the support structure 130.

[0058] In one embodiment, the purging mechanism 300 can be disposed at the end of the pipeline or on the side wall of the pipeline. When the purging mechanism 300 is disposed at the end of the pipeline, the direction of the generated purging airflow can be parallel to the inner wall of the pipeline, or perpendicular to or at a certain angle to the first surface of the scraper 100, or the direction of the purging airflow can change with time or the movement of the scraper 100. When the purging mechanism 300 is disposed on the side wall of the pipeline, the direction of the generated purging airflow can be perpendicular to the inner wall of the pipeline, or perpendicular to or at a certain angle to the first surface of the scraper 100, or the purging direction can change with time or the movement of the scraper 100. For example, if the purging mechanism 300 is disposed on the plunger cover plate at the end of the pipeline, the direction of the purging airflow generated by the purging mechanism 300 forms a certain angle with both the inner wall of the pipeline and the first surface of the scraper 100, so as to remove dust from the scraper 100.

[0059] According to the scraper and dust removal device for pipelines provided by this utility model, by setting the surface of the support structure connecting the dust removal structure and the intermediate structure to be inclined relative to the inner wall of the pipeline, when dust falls on the surface of the scraper, the dust slides down along the inclined surface due to the inclination of the scraper surface, thus avoiding the accumulation of dust on the scraper and causing pipeline blockage, thereby improving the efficiency of pipeline dust removal.

[0060] Please note that the above embodiments are for illustrative purposes only and do not imply any limitation on this application.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A doctor blade for a pipe, characterized in that The utility model relates to a dust scraper for pipeline, comprising: a dust removing structure in the shape of a ring, used to scrape dust off the inner wall of the pipeline; an intermediate structure, used to connect a driving mechanism, and the dust removing structure is arranged around the intermediate structure; a supporting structure, used to connect the dust removing structure and the intermediate structure, and the first surface of the supporting structure is arranged obliquely relative to the inner wall of the pipeline.

2. The doctor for a pipe according to claim 1, characterized in that The included angle between the first surface of the supporting structure and the surface of the pipeline ranges from 30° to 60°.

3. The doctor for a pipe according to claim 1, characterized in that The profile of the scraper is in the shape of a trapezoid, the profile of the intermediate structure constitutes the upper base of the trapezoid, the profile of the dust removing structure constitutes the lower base of the trapezoid, and the profile of the supporting structure constitutes the waist of the trapezoid.

4. The doctor for a pipe according to claim 3, characterized in that The profile size of the intermediate structure ranges from 10 mm to 30 mm, the profile size of the dust removing structure ranges from 45 mm to 65 mm, and the height of the supporting structure ranges from 10 mm to 20 mm.

5. The doctor for a pipe of claim 2, wherein, The supporting structure further comprises a second surface opposite to the first surface, the first surface is close to the driving mechanism, the second surface is close to the dust outlet of the pipeline, and the included angle between the second surface and the surface of the pipeline ranges from 80° to 100°.

6. The doctor for a pipe of claim 1, wherein, The supporting structure is a hollow structure to allow dust to pass through the supporting structure.

7. The doctor for a pipe of claim 1, wherein, The friction coefficient of the first surface is smaller than that of the inner wall of the pipeline.

8. The doctor for tubing of claim 1, wherein, The intermediate structure comprises internal threads to threadedly connect the scraper and the driving mechanism.

9. A dust removal device for a pipe, characterized by The utility model relates to a dust scraper for pipeline, comprising: a scraper for pipeline, comprising any one of claims 1-8; a driving mechanism connected with the scraper, used to drive the scraper to move in the pipeline.

10. The duct dusting apparatus of claim 9, wherein, The utility model further comprises: a purging mechanism, used to generate a purging gas flow to remove dust on the scraper.

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