A glass toughening furnace air grid cleaning device

Abstract

The utility model relates to glass steelization equipment maintenance technical field, concretely relates to a kind of glass toughening furnace wind grid cleaning device, and the device is composed of air path component, hollow telescopic rod and the cleaning head with air hole.By reciprocating movement and the friction of wind grid pipe inner wall of cleaning head, dust or dirt is made to fall off from wind grid wall when cleaning head is inserted into toughening furnace wind grid pipe inside during use.When air path component is connected to compressed air, high-pressure air passes through the passage of air path component and hollow telescopic rod, and is blown out from the air hole of cleaning head.When air path component is connected to negative pressure dust collection equipment, external negative pressure passes through the hollow passage of air path component and telescopic rod in turn, and dust is sucked through the air hole of cleaning head, so that residual dust and dirt are effectively removed.The cleaning device integrates brushing, blowing and dust collection functions without disassembling wind grid, completes efficient and non-destructive in-situ cleaning, greatly improves maintenance efficiency and shortens production downtime.The device has simple structure and strong applicability.

Description

Technical Field

[0001] This utility model relates to the field of glass tempering equipment maintenance technology, and in particular to a glass tempering furnace air grid cleaning device. Background Technology

[0002] In the production of tempered glass, the raw glass sheet is heated to a high temperature and then rapidly cooled to achieve the required strength and safety. This rapid cooling process is primarily accomplished by the air grating system of the glass tempering furnace. Cooling air is sent into the sealed cavity inside the air grating by a high-pressure fan, and finally evenly sprayed onto the high-temperature glass surface through densely distributed air outlets. Therefore, the cleanliness and unobstructed flow of the internal channels of the air grating are crucial for ensuring stable cooling air pressure and uniform airflow, directly determining the finished quality, particle size, and safety performance of the tempered glass.

[0003] However, during long-term continuous operation, dust in the environment and substances volatile from the glass surface will accumulate and clump together on the inner wall of the air duct, forming a thick layer of dirt. This buildup will significantly reduce the air duct diameter, leading to a drop in air pressure and severely disrupting the uniformity of the airflow. This, in turn, will cause uneven cooling of the glass, resulting in serious quality problems such as product deformation, optical distortion, and even spontaneous breakage. It will also increase the energy consumption of the equipment.

[0004] Currently, there are two main methods for cleaning and maintaining air grates in the industry. The first is the simple through-hole method, where operators typically wrap a cloth strip or makeshift brush around a straight rod and insert it into the air grate tube to repeatedly poke and brush. This method suffers from poor cleaning results, inability to effectively remove hardened dirt, the use of makeshift and non-reusable tools, and extremely low cleaning efficiency. The second method is the disassembly and cleaning method, which involves removing the entire air grate from the equipment and rinsing it with a high-pressure water gun or compressed air. While this method improves cleaning results, the disassembly and reassembly process is extremely cumbersome and time-consuming. Furthermore, precise leveling and height adjustment of the air grates after reinstallation is required, a process that demands professional personnel and involves complex adjustments, leading to excessive downtime and severely impacting production continuity.

[0005] Therefore, it is of great significance to develop a cleaning device that can achieve efficient and thorough cleaning without disassembling the air grille, and that is easy to operate and highly adaptable. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing tempering furnace air grate cleaning technologies, such as incomplete and inefficient manual brushing, cumbersome disassembly and cleaning procedures, and long downtime. This invention provides a glass tempering furnace air grate cleaning device. This device achieves efficient, non-destructive, and thorough cleaning of scale buildup inside the pipes without disassembling the air grate, significantly improving cleaning quality and operational efficiency, greatly reducing equipment downtime, and featuring a compact, durable, and highly adaptable structure that facilitates widespread application.

[0007] A cleaning device for the air grate of a glass tempering furnace includes the following structure: An air path assembly, which is used to connect a compressed air device or a negative pressure dust collection device; The telescopic rod is a hollow tubular structure, and one end of the telescopic rod is detachably connected to the air passage assembly; A cleaning head, which is detachably connected to the other end of the telescopic rod; The cleaning head includes a hollow brush base and bristles disposed on the outer surface of the brush base. The side wall of the brush base is provided with a plurality of ventilation holes communicating with the internal cavity of the brush base.

[0008] This invention provides a cleaning device for the air grate of a glass tempering furnace. The device consists of an air circuit assembly, a hollow telescopic rod, and a cleaning head with ventilation holes. In use, the cleaning head is inserted into the air grate tube of the tempering furnace. The reciprocating motion of the cleaning head rubs against the inner wall of the air grate tube, causing dust or dirt to fall off. When compressed air is connected to the air circuit assembly, high-pressure air passes through the channels of the air circuit assembly and the hollow telescopic rod, and is blown out through the ventilation holes of the cleaning head, further rinsing the inner wall of the air grate. If a negative pressure dust collector is connected to the air circuit assembly, external negative pressure passes sequentially through the hollow channels of the air circuit assembly and the telescopic rod, and is sucked up through the ventilation holes of the cleaning head, effectively removing residual dust and dirt and ensuring a thorough cleaning of the inside of the air grate tube.

[0009] This cleaning device integrates brushing, blowing, and vacuuming functions without requiring the removal of the air grille, achieving efficient and non-destructive in-situ cleaning, significantly improving maintenance efficiency and shortening downtime. Furthermore, the device has a simple structure, strong applicability, and is easy to promote and apply.

[0010] As a preferred embodiment of this utility model, the telescopic rod includes at least two hollow tubes of different diameters that can be nested together. An external locking connector is provided at the connection between adjacent hollow tubes to lock the relative position of the two hollow tubes to prevent slippage or retraction.

[0011] As a preferred embodiment of this utility model, the external locking connector includes an anti-slip sleeve and a locking bolt. The anti-slip sleeve is fixedly sleeved on the end of the outer hollow tube, and the locking bolt penetrates the anti-slip sleeve radially. By tightening the locking bolt, the end of the locking bolt abuts against the outer wall of the inner hollow tube, thereby locking the relative positions of the inner and outer hollow tubes.

[0012] As a preferred embodiment of this utility model, the two ends of the telescopic rod are respectively fixedly connected to the air circuit assembly and the cleaning head through threaded joints.

[0013] As a preferred embodiment of this utility model, the brush holder is a component made of stainless steel, aluminum alloy, or plastic.

[0014] As a preferred embodiment of this utility model, the bristles are made of plastic, metal wire, or fiber.

[0015] As a preferred embodiment of the present invention, the bristles include a plurality of bristle bundles extending along the axial direction of the brush holder, and the bristle bundles are formed by the aggregation of multiple single bristles.

[0016] As a preferred embodiment of this utility model, the diameter of the bristle bundle is 3-5 mm, and / or the diameter of the single bristle is 0.1-0.3 mm, and / or the length of the bristle bundle extending from the brush base surface is 30-50 mm.

[0017] As a preferred embodiment of this utility model, the diameter of the ventilation hole is 3 to 8 mm, and / or, a plurality of the ventilation holes are distributed at intervals of 30° to 45° along the circumference of the brush holder.

[0018] As a preferred embodiment of this utility model, the spacing between adjacent hair bundles is 8-12 mm.

[0019] As a preferred embodiment of this utility model, the air circuit assembly is an air pipe, which is connected to the telescopic rod via a quick connector.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a cleaning device for the air grate of a glass tempering furnace. The device consists of an air path assembly, a hollow telescopic rod, and a cleaning head with ventilation holes. In use, the cleaning head is inserted into the air grate tube of the tempering furnace. The reciprocating motion of the cleaning head rubs against the inner wall of the air grate tube, causing dust or dirt to fall off. When compressed air is connected to the air path assembly, high-pressure air passes through the channels of the air path assembly and the hollow telescopic rod, and is blown out through the ventilation holes of the cleaning head, further rinsing the inner wall of the air grate. If a negative pressure vacuum cleaner is connected to the air path assembly, external negative pressure passes through the hollow channels of the air path assembly and the telescopic rod, and is sucked up through the ventilation holes of the cleaning head, effectively removing residual dust and dirt and ensuring thorough cleaning of the inside of the air grate tube. This cleaning device integrates brushing, blowing, and vacuuming functions without disassembling the air grate, achieving efficient and non-destructive in-situ cleaning, significantly improving maintenance efficiency and shortening downtime. Furthermore, the device has a simple structure, strong applicability, and is easy to promote and apply. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the glass tempering furnace air grate cleaning device of this utility model.

[0022] Figure 2 This is a schematic diagram of the telescopic rod.

[0023] Figure 3 This is a schematic diagram of the cleaning head.

[0024] Marked in the image: 1-Air circuit assembly; 2-Telescopic rod; 21-Air pipe connector; 22-Internal threaded connector; 23-Hollow tube; 24-External locking connector; 3-Cleaning head; 31-Brush holder; 32-Bristle bundle; 33-Ventilation hole; 34-Connecting nut. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0026] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0028] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0029] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0030] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0031] Existing tempering furnace air grate cleaning technologies suffer from incomplete and inefficient manual brushing, as well as cumbersome disassembly and cleaning processes that result in long downtime.

[0032] This utility model provides a cleaning device for the air grate of a glass tempering furnace, comprising the following structure: An air path assembly, which is used to connect a compressed air device or a negative pressure dust collection device; The telescopic rod is a hollow tubular structure, and one end of the telescopic rod is detachably connected to the air passage assembly; A cleaning head, which is detachably connected to the other end of the telescopic rod; The cleaning head includes a hollow brush base and bristles disposed on the outer surface of the brush base. The side wall of the brush base is provided with a plurality of ventilation holes communicating with the internal cavity of the brush base.

[0033] During use, insert the cleaning head into the tempering furnace's air grate tube. The reciprocating motion of the cleaning head rubs against the inner wall of the air grate tube, causing dust or dirt to fall off. When compressed air is connected to the air circuit assembly, high-pressure air passes through the channels of the air circuit assembly and the hollow telescopic rod, and is blown out through the ventilation holes of the cleaning head, further rinsing the inner wall of the air grate. If the air circuit assembly is connected to a negative pressure dust collector, external negative pressure passes sequentially through the hollow channels of the air circuit assembly and the telescopic rod, and is sucked up through the ventilation holes of the cleaning head, effectively removing residual dust and dirt and ensuring a thorough cleaning of the inside of the air grate tube.

[0034] This cleaning device integrates brushing, blowing, and vacuuming functions without requiring the removal of the air grille, achieving efficient and non-destructive in-situ cleaning, significantly improving maintenance efficiency and shortening downtime. Furthermore, the device has a simple structure, strong applicability, and is easy to promote and apply.

[0035] In some embodiments, the telescopic rod includes at least two hollow tubes of different diameters that can be nested together. An external locking connector is provided at the joint between adjacent hollow tubes to lock the relative position of the two hollow tubes to prevent slippage or retraction. This design enables the cleaning device to have flexible length adjustment capabilities, facilitating precise adaptation and effective cleaning of tempering furnace air grilles of various sizes, from short to tall, significantly improving the device's versatility and application range.

[0036] In some embodiments, the external locking connector includes an anti-slip sleeve and a locking bolt. The anti-slip sleeve is fixedly fitted onto the end of the outer hollow tube, and the locking bolt radially penetrates the anti-slip sleeve. By tightening the locking bolt, the end of the locking bolt abuts against the outer wall of the inner hollow tube, thereby locking the relative positions of the inner and outer hollow tubes. When the locking bolt is tightened, the end of the locking bolt directly forms a rigid abutment against the outer wall of the inner hollow tube, generating a static friction force sufficient to prevent relative slippage between the inner and outer tubes, thus firmly locking them together. This radial pressure method effectively resists the axial pushing and pulling forces and torsional forces generated during cleaning operations, preventing accidental slippage or retraction of the sleeve during operation. Simultaneously, the design of fixing the anti-slip sleeve to the end of the outer tube not only provides a stable support base for the locking bolt, avoiding damage to the tube body from repeated tightening operations, but also significantly improves the structural strength and durability of the entire connection. The structure is simple and the operation is convenient.

[0037] In some embodiments, the two ends of the telescopic rod are respectively fixedly connected to the air circuit assembly and the cleaning head via threaded joints.

[0038] In some embodiments, the brush holder is a component made of stainless steel, aluminum alloy, or plastic.

[0039] In some embodiments, the bristles are made of plastic, metal wire, or fiber.

[0040] In some embodiments, the bristles comprise a plurality of bristle bundles extending axially along the brush holder, the bristle bundles being formed by the aggregation of multiple individual bristles.

[0041] In some embodiments, the diameter of the bristle tuft is 3-5 mm, for example, the diameter of the bristle tuft is 3 mm, 4 mm or 5 mm. And / or, the diameter of the individual bristle is 0.1-0.3 mm, for example, the diameter of the individual bristle is 0.1 mm, 0.2 mm or 0.3 mm; and / or, the length of the bristle tuft extending from the brush holder surface is 30-50 mm. For example, the length of the bristle tuft extending from the brush holder surface is 30 mm, 35 mm, 40 mm, 45 mm or 50 mm. Research has found that bristle tufts with a diameter of 3–5 mm help provide sufficient effective cleaning area and structural support, avoiding bending failure due to excessive thinness or loss of conformity to the curved surface of the pipe wall due to excessive coarseness. Combined with a single bristle diameter of 0.1–0.3 mm, the bristle tufts have the necessary rigidity to scrape off hardened dirt, while retaining sufficient flexibility of individual bristles to buffer potential wear on the inner wall of the air grating, achieving non-destructive cleaning. The extension length of 30–50 mm ensures sufficient and effective contact and scraping pressure between the bristles and the inner wall of the air grating, while avoiding entanglement, jamming, or excessive bending damage during operation due to excessive length. Through parameter design, it is possible to achieve stable, efficient, and non-destructive cleaning results for air gratings with different inner diameters.

[0042] In some embodiments, the diameter of the ventilation holes is 3 to 8 mm, for example, the diameter of the ventilation holes is 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, or 8 mm; and / or, a plurality of the ventilation holes are distributed at intervals of 30° to 45° along the circumference of the brush holder. For example, 12 ventilation holes are distributed at intervals of 30° along the circumference of the brush holder. 8 ventilation holes are distributed at intervals of 45° along the circumference of the brush holder. Research has found that ventilation holes with a diameter of 3–8 mm can form a high-pressure airflow with sufficient momentum under the compressed air pressure of a conventional factory, effectively blowing away dirt loosened by the brush bristles. At the same time, it avoids the increased airflow resistance and insufficient cleaning power caused by too small a hole diameter, or the rapid attenuation of air pressure and dispersion of impact force caused by too large a hole diameter. More importantly, the circumferential distribution interval of 30°–45° and the hole diameter range form a synergistic effect, which can ensure that the ventilation holes are directly or obliquely facing the inner wall of the air grid at any rotation angle of the brush holder, realizing a circumferential blowing and adsorption without cleaning dead angles, and also ensure that the support structure between the holes has sufficient strength to avoid weakening the cleaning head structure. When the two parameters are controlled simultaneously, the device can form a uniformly covered and concentrated airflow field in the high-pressure blowing mode, and establish a comprehensive and effective negative pressure adsorption area in the negative pressure dust collection mode.

[0043] In some embodiments, the spacing between adjacent bristle tufts is 8–12 mm. A spacing of less than 8 mm results in excessively dense bristle tufts, which not only significantly increases the frictional resistance between the bristles and the inner wall of the air vent, making operation more difficult, but also hinders the smooth airflow from the ventilation holes, weakening the blowing and vacuuming efficiency. A spacing greater than 12 mm creates cleaning blind spots, causing some parts of the inner wall of the air vent to be unable to be effectively scraped by the bristles, affecting the thoroughness of cleaning. For example, the spacing between adjacent bristle tufts is 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm.

[0044] In some embodiments, the airway assembly is an air tube connected to the telescopic rod via a quick connector.

[0045] To better understand the technical solutions of the above embodiments, the following more detailed implementation methods are provided for further explanation.

[0046] Example like Figure 1-3 As shown in the figure, this embodiment provides a cleaning device for the air grate of a glass tempering furnace. The device mainly includes an air passage assembly 1, a telescopic rod 2, and a cleaning head 3.

[0047] The air circuit assembly 1 is a flexible air hose made of pressure-resistant PVC or rubber, capable of withstanding the pressure of compressed air and the negative pressure of a vacuum cleaner. In use, one end of the flexible air hose is equipped with a quick connector with a nominal diameter of 6mm (not shown separately in the figure), which is used to quickly and reliably connect to an external compressed air device or a negative pressure vacuum cleaner, enabling convenient switching between the two working modes.

[0048] The telescopic rod 2 is a hollow tubular structure made of 304 stainless steel, possessing good rigidity and corrosion resistance. One end of the telescopic rod 2 is detachably connected to the quick connector of the air circuit assembly 1 via an air pipe connector 21. In this embodiment, the telescopic rod 2 is composed of multiple hollow tubes 23 of different diameters nested together. The inner diameter of the outer stainless steel tube is slightly larger than the outer diameter of the inner stainless steel tube, with a clearance fit between them, allowing the inner tube to slide smoothly within the outer tube to achieve length adjustment.

[0049] The cleaning head 3 is detachably connected to the end of the telescopic rod 2 away from the air pipe connector 21 via a connecting nut 34. The cleaning head 3 includes a hollow cylindrical brush holder 31 made of 304 stainless steel. Multiple bundles of plastic bristles 32 are embedded at equal intervals of 10mm on the outer surface of the brush holder 31, forming a bristle structure. Multiple ventilation holes 33 with a diameter of 5mm are opened on the side wall of the brush holder 31. These ventilation holes 33 are evenly distributed at equal angular intervals of 30° along the circumference of the brush holder 31 to ensure the uniformity of circumferential airflow or dust suction.

[0050] During use, the operator adjusts the telescopic rod 2 to a suitable position according to the length of the air grating to be cleaned. The cleaning head 3 is inserted into the air grating tube, and through reciprocating motion, the brush structure scrapes the inner wall of the air grating, loosening and removing accumulated dirt and dust. The air circuit assembly 1 is then connected to compressed air at 0.5-0.8 MPa. The high-pressure airflow flows sequentially through the air pipe connector 21, the hollow channel of the telescopic rod 2, and the internal cavity of the brush holder 31 of the cleaning head 3, finally exiting at high speed from the ventilation hole 33. This process powerfully washes the inner wall of the air grating, which has just been loosened by the bristles, and blows away most of the dust. After brushing and blowing, the air circuit assembly 1 is switched to connect to a high-powered industrial vacuum cleaner. At this time, the fine dust remaining in the air grating is sucked in from the ventilation hole 33 under negative pressure, flowing sequentially through the cavity of the brush holder 31, the hollow channel of the telescopic rod 2, and the air circuit assembly 1, and finally collected in the vacuum cleaner, thus achieving thorough cleaning.

[0051] In one or more embodiments, an external locking connector 24 is provided at the connection point of the two sleeved hollow tubes 23. The external locking connector 24 includes an anti-slip sleeve fixedly fitted to the end of the outer stainless steel tube, and a locking bolt radially penetrating the sidewall of the anti-slip sleeve. When the telescopic rod 2 is adjusted to the required length, tightening the bolt causes its end to abut against the outer wall of the inner stainless steel tube, generating significant friction and thus firmly locking the inner and outer tubes in their relative positions. This structure effectively solves the problem of accidental slippage or retraction of the sleeves during cleaning, improving operational stability and reliability.

[0052] Meanwhile, each hollow tube 23 of the telescopic rod 2 has external threads machined at both ends. The two ends of the telescopic rod 2 are respectively fixedly connected to the air pipe connector 21 and the external threads of the cleaning head 3 (i.e., the matching parts of the connecting nut 34) through the internal threaded connector 22. This fully threaded connection method is not only simple in structure and reliable in connection, ensuring the air circuit is sealed, but also facilitates the disassembly and maintenance of the device.

[0053] In one or more embodiments, key parameters of the cleaning head 3 have been specifically optimized to achieve optimal cleaning performance, airflow efficiency, and adaptability. For example, in this embodiment, the plastic bristles on the brush holder 31 form multiple bristle tufts 32 extending axially along the brush holder. The overall outer diameter of the bristle tuft 32 is 4 mm, the diameter of a single bristle is 0.1 mm, and the length of the free end of the bristle tuft extending from the brush holder surface is 40 mm. The bristle tuft possesses both excellent rigidity (ensuring scraping force) and flexibility (ensuring good fit to the tube wall without damage), and this size optimally matches the inner diameter of common air vents.

[0054] The ventilation holes 33, designed to complement the bristle tufts, are 5mm in diameter and spaced 30° circumferentially. The 5mm diameter generates a sufficiently powerful airflow under standard factory compressed air pressure, without the air pressure dropping too quickly due to excessively large holes. The 30° equidistant distribution ensures that at any rotation angle of the brush head, the ventilation holes are directly or obliquely aligned with the inner wall of the air grille. Combined with the physical scraping action of the bristles, this achieves a comprehensive, thorough cleaning effect with no blind spots.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cleaning device for the air grate of a glass tempering furnace, characterized in that, Includes the following structure: An air path assembly, which is used to connect a compressed air device or a negative pressure dust collection device; The telescopic rod is a hollow tubular structure, and one end of the telescopic rod is detachably connected to the air passage assembly; A cleaning head, which is detachably connected to the other end of the telescopic rod; The cleaning head includes a hollow brush base and bristles disposed on the outer surface of the brush base. The side wall of the brush base is provided with a plurality of ventilation holes communicating with the internal cavity of the brush base.

2. The glass tempering furnace air grate cleaning device according to claim 1, characterized in that, The telescopic rod includes at least two hollow tubes of different diameters that can be nested together. An external locking connector is provided at the connection between adjacent hollow tubes to lock the relative position of the two hollow tubes to prevent slippage or retraction.

3. The glass tempering furnace air grate cleaning device according to claim 2, characterized in that, The external locking connector includes an anti-slip sleeve and a locking bolt. The anti-slip sleeve is fixedly fitted onto the end of the outer hollow tube, and the locking bolt penetrates the anti-slip sleeve radially. By tightening the locking bolt, the end of the locking bolt abuts against the outer wall of the inner hollow tube, thereby locking the relative positions of the inner and outer hollow tubes.

4. The glass tempering furnace air grate cleaning device according to claim 1, characterized in that, The two ends of the telescopic rod are respectively fixedly connected to the air circuit assembly and the cleaning head via threaded joints.

5. The glass tempering furnace air grate cleaning device according to claim 1, characterized in that, The brush holder is made of stainless steel, aluminum alloy, or plastic.

6. The glass tempering furnace air grate cleaning device according to claim 1, characterized in that, The bristles are made of plastic, metal wire, or fiber.

7. The glass tempering furnace air grate cleaning device according to claim 6, characterized in that, The bristles comprise multiple tufts of bristles extending axially along the brush base, each tuft being formed by the aggregation of multiple individual bristles.

8. The glass tempering furnace air grate cleaning device according to claim 7, characterized in that, The diameter of the bristle bundle is 3-5 mm, and / or the diameter of the single bristle is 0.1-0.3 mm, and / or the length of the bristle bundle extending from the brush base surface is 30-50 mm, and / or the spacing between adjacent bristle bundles is 8-12 mm.

9. The glass tempering furnace air grate cleaning device according to claim 1, characterized in that, The diameter of the ventilation holes is 3 to 8 mm, and / or, a plurality of the ventilation holes are distributed at intervals of 30° to 45° along the circumference of the brush holder.

10. The glass tempering furnace air grate cleaning device according to any one of claims 1 to 9, characterized in that, The air circuit assembly is an air tube, which is connected to the telescopic rod via a quick connector.

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