A limited tube inspection window soot cleaning device

Abstract

The application discloses a limited tube inspection window ash removal device, and relates to the technical field of tobacco machines, which comprises a scraping mechanism and a driving mechanism. The scraping mechanism comprises a base and a strip-shaped scraper. The base is arranged in the limited tube and located at one side of the inspection window. One side of the scraper is movably arranged on the base, and the other side of the scraper extends and keeps contact with the inner wall of the inspection window. The driving mechanism is arranged in the limited tube and in transmission connection with the base, and is used for driving the base to reciprocate along the axis of the limited tube. In the use process, the device can effectively remove the humid dust adhered to the inner wall of the inspection window through mechanical scraping, eliminate the false signal problem caused by the shielding of the photoelectric sensor, guarantee the continuity and stability of the production process, and reduce the maintenance cost.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, specifically to a dust removal device for a limited quantity tube inspection window. Background Technology

[0002] In the cigarette manufacturing process, the flow control tube is a key component for material conveying and flow control. The cleanliness of its interior directly affects the accuracy of photoelectric detection signals and the continuity of production. After the tobacco is heated and humidified, the moisture content increases, and the resulting fine dust easily adheres and accumulates on the tube wall. This accumulation is particularly severe in high-temperature and high-humidity workshop environments, becoming a major hidden danger affecting the reliable operation of the equipment.

[0003] Currently, compressed air is commonly used for timed blowing in silk-making workshops for dust removal. While this method can remove some loose dust to a certain extent, its effectiveness in cleaning damp dust layers that have adhered to the inner wall of the pipes is limited. Over time, dust continues to adhere to the transmitting / receiving windows of photoelectric sensors, causing false signal triggers. The system misjudges the "material presence" status, leading to material shortages or equipment idling in subsequent processes. This not only affects the overall production efficiency of the line but also increases the frequency of manual intervention and the burden of equipment maintenance.

[0004] Therefore, this application proposes a dust removal device for the inspection window of a limit tube, which can mechanically scrape off the damp dust adhering to the inner wall of the limit tube, eliminate false alarms caused by photoelectric sensor obstruction, and improve the stability and automation level of the system operation. Utility Model Content

[0005] The main purpose of this application is to provide a dust removal device for the inspection window of a limit tube, which aims to solve the technical problem that the photoelectric sensor is blocked due to damp dust adhering to the inner wall of the limit tube, thereby causing false signals and affecting the continuity of production.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A dust removal device for a limited-quantity tube inspection window, comprising:

[0008] The scraping mechanism includes a base and a strip-shaped scraper; the base is disposed inside the limiting tube and located on one side of the inspection window, and the scraper is movably mounted on one side of the base near the inspection window, while the other side extends toward the inspection window and remains in close contact with the inner wall of the inspection window.

[0009] A drive mechanism is disposed inside the limiting tube and is connected to the base for driving the base to reciprocate along the axial direction of the limiting tube.

[0010] As a further improvement of this application, a U-shaped baffle is provided on each side of the inspection window along the moving direction of the base. The two vertical sections of the U-shaped baffle are connected to the inner wall of the limiting tube, and a limiting hole extending along the moving direction of the base is formed between its long side section and the inner wall of the limiting tube. The two ends of the base along the length direction of the scraper are slidably inserted into the two limiting holes respectively.

[0011] As a further improvement of this application, the driving mechanism is an electric telescopic rod, the movable end of the electric telescopic rod is connected to the base, and a stiffening plate is provided at the connection between the base and the movable end.

[0012] As a further improvement of this application, a slot is provided on the side of the base near the inspection window along the length of the scraper, and a retaining strip is provided on the side of the scraper away from the inspection window that is adapted to the slot. The scraper is detachably engaged in the slot through the retaining strip. A piston is provided at each end of the slot along its extension direction, and the two pistons are close to each other to press against the retaining strip.

[0013] As a further improvement of this application, the extension path of the card slot is located within the cross-section of the limiting tube and is offset perpendicular to the axis of the limiting tube; the cross-section of the card slot is convex, the cross-sectional shape of the card strip is adapted to the card slot, and the card strip and the card slot form an interference fit.

[0014] As a further improvement of this application, the long side of the scraper that keeps in close contact with the inner wall of the inspection window is made of polyurethane.

[0015] The technical solution provided in this application may include the following beneficial effects:

[0016] During use, this application utilizes a drive mechanism to reciprocate the base equipped with a scraper along the axial direction of the measuring tube, enabling the scraper to directly and forcefully remove the dust layer adhering to the inner wall of the inspection window. Compared to air blowing, this method is more thorough and effective in cleaning moist and sticky dust, avoiding false signal triggering caused by dust accumulation obstructing the photoelectric sensor. This ensures the continuity and stability of the silk-making production process, reduces production interruptions and equipment idling due to false alarms, and lowers the frequency and cost of manual maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a three-dimensional structural diagram of a dust removal device for a limited-quantity tube inspection window;

[0019] Figure 2 yes Figure 1 Exploded view of the three-dimensional structure of the scraping mechanism;

[0020] Figure label:

[0021] 100. Limiting tube; 200. Inspection window;

[0022] 1. Scraping mechanism; 11. Base; 111. Slot; 12. Scraper; 121. Clip; 13. Piston; 2. Drive mechanism; 3. U-shaped baffle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] Figure 1 An embodiment of a limited-quantity tube inspection window cleaning device of this application is shown; see [link to relevant documentation]. Figure 1 In this embodiment, the dust removal device for the limited tube inspection window includes: a scraping mechanism 1 and a driving mechanism 2.

[0025] Among them, see Figure 1 and Figure 2 The scraping mechanism 1 includes a base 11 and a strip-shaped scraper 12. The base 11 is disposed within the limiting tube 100 and located on one side of the inspection window 200. The scraper 12 is movably mounted on one side of the base 11 near the inspection window 200, and extends towards the inspection window 200 on the other side, maintaining close contact with the inner wall of the inspection window 200. The drive mechanism 2 is disposed within the limiting tube 100 and is connected to the base 11 for transmission. During use, the drive mechanism 2 drives the base 11 to reciprocate along the axial direction of the limiting tube 100, enabling the scraper 12 to directly and forcefully scrape off the dust layer adhering to the inner wall of the inspection window 200. Compared to air blowing, this method is more thorough and effective in cleaning moist and sticky dust, avoiding false signal triggering caused by dust accumulation blocking the photoelectric sensor, ensuring the continuity and stability of the silk production process, reducing production interruptions and equipment idling due to false alarms, and reducing the frequency and cost of manual maintenance.

[0026] Further, see Figure 1A U-shaped baffle 3 is provided on each side of the inspection window 200 along the moving direction of its base 11. The two vertical sections of the U-shaped baffle 3 are connected to the inner wall of the limiting tube 100, while its long side maintains a certain distance from the tube wall, thus forming a limiting hole with an approximately rectangular cross-section extending along the moving direction of the base 11. The two ends of the base 11 along the length of the scraper 12 are slidably inserted into these two limiting holes. The rigid limiting channel formed by the U-shaped baffle 3 and the inner wall of the limiting tube 100 provides precise axial guidance and reliable constraint for the movement of the base 11, preventing the scraper 12 from deflecting, jamming, or deviating from its predetermined trajectory due to uneven force during operation, thereby improving the stability and reliability of the scraping action.

[0027] Optionally, both vertical sections of the U-shaped baffle 3 are detachably connected to the inner wall of the limiting tube 100 by bolts. While ensuring sufficient connection strength and operational stability, this greatly facilitates subsequent maintenance or replacement operations. When the limiting hole wears down due to long-term use, or when internal parts such as the base 11 and scraper 12 need to be inspected, the operator only needs to remove the fixing bolts to remove the U-shaped baffle 3 from inside the limiting tube 100.

[0028] Further, see Figure 1 The drive mechanism 2 uses an electric telescopic rod, the movable end of which is fixed to the side of the base 11 via a flange. A stiffening plate is specially provided at the connection between the base 11 and the movable end to enhance the rigidity and strength of the connection area, preventing the base 11 from deforming or loosening due to stress concentration when the electric telescopic rod frequently pushes the base 11 back and forth. The fixed end of the electric telescopic rod is installed on the inner wall of the measuring cylinder. By receiving signals from the control system, it can precisely control the extension and retraction stroke and speed of the push rod, thereby driving the base 11 to slide back and forth along the axis of the measuring cylinder and driving the scraper 12 to scrape the inner wall of the inspection window 200.

[0029] Further, see Figure 2 The base 11 has a through-type slot 111 along the length of the scraper 12 on the side near the inspection window 200. On the back of the scraper 12, away from the inspection window 200, a retaining strip 121 is integrally formed, matching the shape of the slot 111. The scraper 12 is slidably embedded into the slot 111 of the base 11 via the retaining strip 121, achieving a detachable and stable connection. This provides sufficient lateral support for the scraper 12, preventing lateral shift or vibration during scraping operations and ensuring uniform and stable contact between the scraper 12 and the glass of the inspection window 200. Simultaneously, it allows the scraper 12 to be removed and replaced simply by sliding it along the slot 111 after wear, without disassembling the entire base 11 or drive mechanism 2, simplifying maintenance, reducing downtime, and improving maintainability and ease of operation.

[0030] Further, see Figure 2 The base 11 has a through-type groove 111 along the length of the scraper 12 on the side near the inspection window 200. On the back of the scraper 12, away from the inspection window 200, a retaining strip 121 is integrally formed, matching the shape of the groove 111. The scraper 12 slidably embeds into the groove 111 of the base 11 via this retaining strip 121. Specifically, a piston 13 is provided at each end of the groove 111, and these two pistons 13 respectively engage at both ends of the groove 111. When the scraper 12 is pushed into the groove 111 to the working position, the pistons 13 at both ends move closer together to press the scraper, providing a good limiting effect. After the scraper 12 wears out, the operator can remove the pistons 13 and still easily slide it out along the groove 111 for replacement, making the maintenance process simple and efficient.

[0031] Further, see Figure 2 The extension path of the slot 111 is precisely constrained within the cross-sectional profile of the limiting tube 100 and is offset perpendicular to the axis of the limiting tube 100. This layout provides the optimal force path for the scraper 12 without interfering with the movement of other components within the tube. The cross-section of the slot 111 adopts a convex design, and the cross-sectional shape of the matching clip 121 is perfectly adapted, with a slight interference fit between the two. This ensures that when the scraper 12 is subjected to scraping resistance, the clip 121 can form a uniform surface contact with the shoulder of the convex slot 111, suppressing the warping or shaking of the scraper 12 under complex loads and improving the stability and uniformity of force application during the scraping process. At the same time, the interference fit, while ensuring a tight connection without the need for additional fasteners, still allows the scraper 12 to be easily slid out along the slot 111 for replacement during maintenance using appropriate tools, achieving a balance between high reliability and convenient maintenance.

[0032] Optionally, the long side of the scraper 12 that maintains contact with the inner wall of the inspection window 200 is made of polyurethane. This material combines excellent elasticity, abrasion resistance, and oil resistance. Its softness ensures that the long side of the scraper 12 undergoes moderate elastic deformation when pressed against the inner wall of the inspection window 200, thereby forming an effective seal and scraping without damaging the glass surface. Driven by the electric telescopic rod, the polyurethane edge strip can move smoothly and closely against the inner wall of the inspection window 200, thoroughly scraping away moisture, oil, or adhering tobacco residue and other impurities attached to the inner surface of the glass, ensuring a continuously clear field of view. At the same time, its high abrasion resistance extends the service life of the scraper 12, reduces maintenance costs caused by frequent replacements, and improves the reliability and economy of the device operation.

[0033] For example, the working principle of the dust removal device for the limit tube inspection window is as follows:

[0034] When the device is started, the electric telescopic rod begins to work under the command of the control system. Its movable end is rigidly connected to the base 11 via a stiffening plate, pushing the entire scraping mechanism 1 to move smoothly along the limiting hole formed by the U-shaped baffle 3 and the pipe wall. The scraper 12 on the base 11 is connected to the base 11 through an interference fit between its retaining strip 121 and the retaining groove 111 of the base 11. The long polyurethane side of the scraper 12 always elastically presses against the inner wall of the inspection window 200 during the movement. The reciprocating motion of the electric telescopic rod drives the scraper 12 to continuously scrape the inner surface of the glass of the inspection window 200 along a limited trajectory, removing attached moisture, dust, and adhesives, and maintaining the light transmittance of the glass. The entire dust removal process requires no manual intervention, realizing automatic, efficient, and non-destructive cleaning of the inspection window 200 while the equipment is running.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dust removal device for a limited-quantity tube inspection window, characterized in that, include: The scraping mechanism (1) includes a base (11) and a strip scraper (12); the base (11) is disposed inside the limiting tube (100) and located on one side of the inspection window (200); the scraper (12) is movably mounted on one side of the base (11) near the inspection window (200) and extends towards the inspection window (200) on the other side, and keeps in close contact with the inner wall of the inspection window (200); The drive mechanism (2) is located inside the limiting tube (100) and is connected to the base (11) for driving the base (11) to reciprocate along the axial direction of the limiting tube (100).

2. The dust removal device for the inspection window of the limited-quantity tube according to claim 1, characterized in that, The inspection window (200) is provided with a U-shaped baffle (3) on each side along the moving direction of the base (11). The two vertical sections of the U-shaped baffle (3) are connected to the inner wall of the limiting tube (100). The long side section forms a limiting hole extending along the moving direction of the base (11) with the inner wall of the limiting tube (100). The two ends of the base (11) along the length direction of the scraper (12) are slidably inserted into the two limiting holes.

3. The dust removal device for the inspection window of the limited-quantity tube according to claim 1, characterized in that, The drive mechanism (2) is an electric telescopic rod. The movable end of the electric telescopic rod is connected to the base (11), and a stiffening plate is provided at the connection between the base (11) and the movable end.

4. The dust removal device for the inspection window of the limited-quantity tube according to claim 1, characterized in that, The base (11) has a slot (111) on the side near the inspection window (200) along the length of the scraper (12). The scraper (12) is provided with a retaining strip (121) on the side away from the inspection window (200) that is adapted to the slot (111). The scraper (12) is detachably engaged in the slot (111) by the retaining strip (121). A piston (13) is provided at each end of the slot (111) along its extension direction. The two pistons (13) approach each other to press against the retaining strip (121).

5. The dust removal device for the inspection window of the limited-quantity tube according to claim 4, characterized in that, The extension path of the slot (111) is within the cross-section of the limiting tube (100) and is offset perpendicular to the axis of the limiting tube (100); the cross-section of the slot (111) is convex, the cross-sectional shape of the strip (121) is adapted to the slot (111), and the strip (121) and the slot (111) form an interference fit.

6. The dust removal device for the inspection window of the limited-quantity tube according to claim 1, characterized in that, The long side of the scraper (12) that is in close contact with the inner wall of the inspection window (200) is made of polyurethane.

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