A vacuum heating furnace flue dust removal device

Abstract

This utility model relates to the field of furnace flue cleaning technology, and more particularly to a vacuum furnace flue cleaning device. The vacuum furnace flue cleaning device includes a pneumatic transmission mechanism installed inside the main duct. The top of the pneumatic transmission mechanism extends out of the main duct and is equipped with a drill bit and a variable-diameter wire brush. After air is injected into the main duct, the pneumatic transmission mechanism drives the drill bit and the variable-diameter wire brush to rotate synchronously. At the end of the main duct is a traction mechanism and a paddle-powered air duct connected to a fan. The vacuum furnace flue cleaning device proposed in this utility model uses a pneumatic transmission mechanism to drive the drill bit and the variable-diameter wire brush to rotate synchronously, thereby cleaning the dust adhering to the inner wall of the furnace flue. This effectively cleans the dust inside the furnace flue. A dust collection device at the end of the furnace flue collects the cleaned dust, preventing dust pollution. During ventilation, the cleaned dust is also blown into the dust collection device, improving the recovery effect of the cleaned dust.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace flue cleaning technology, and in particular to a vacuum heating furnace flue cleaning device. Background Technology

[0002] During operation, vacuum heating furnaces discharge ash generated from combustion through the flue pipes. However, with prolonged operation, dust and soot gradually accumulate on the inner wall of the flue pipes, leading to decreased heating efficiency, increased fuel consumption, and other negative impacts. In severe cases, this can even cause safety accidents and dust pollution. Therefore, regular cleaning of the vacuum heating furnace flue pipes is necessary to prevent these issues. Currently, cleaning of vacuum heating furnace flue pipes relies primarily on manual labor. However, this method is ineffective and fails to remove dust from the flue pipes effectively. Even after cleaning, a large amount of dust and coke often remains inside the flue pipes, still affecting the normal operation of the vacuum heating furnace. In severe cases, uneven heating can cause deformation of the flue pipes, shorten their service life, and even render the furnace unusable. Therefore, to address these shortcomings, a vacuum heating furnace flue pipe cleaning device is proposed. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a vacuum heating furnace flue cleaning device, which solves the problem that relying solely on manual cleaning of flue pipes in existing technologies results in poor cleaning effects, leading to dust accumulation inside the flue pipes that affects the normal operation of the heating furnace or even damages the heating furnace.

[0004] (II) Technical Solution To solve the above problems, this utility model provides a vacuum heating furnace flue cleaning device, comprising: The main duct contains a wind-driven transmission mechanism, with its top end extending beyond the top of the main duct and its bottom end inside. A drill bit is located at the top of the wind-driven transmission mechanism, and a ring-shaped variable-diameter wire brush is positioned below the drill bit. After air is injected into the main duct, the wind-driven transmission mechanism drives the drill bit and the variable-diameter wire brush to rotate. At the end of the main duct is a paddle-powered air duct and a traction mechanism; one end of the paddle-powered air duct is connected to the main duct, and the other end is connected to a fan. The main duct extends downwards into the heating furnace flue pipe along with the drill bit, and an ash-collecting device is located at the end of the heating furnace flue pipe.

[0005] Preferably, the wind power transmission mechanism includes a magnetic levitation rotor and two magnetic levitation stators, the two magnetic levitation stators being arranged concentrically with the main pipe; the magnetic levitation rotor passes through the center of the two magnetic levitation stators along the axial direction and its top extends out of the top of the main pipe; the magnetic levitation rotor is uniformly provided with multiple fan blades.

[0006] Preferably, both the magnetic levitation rotor and the magnetic levitation stator are magnets, and the magnetic levitation rotor and the magnetic levitation stator are magnetically assembled to make the magnetic levitation rotor levitate in the middle of the magnetic levitation stator.

[0007] Preferably, the surface of the magnetic levitation stator is uniformly provided with multiple axially continuous dust removal air ducts.

[0008] Preferably, the outer surface of the main pipe is uniformly provided with multiple sets of rollers along the axial direction, and each set of rollers includes multiple sliding rollers; in each set of rollers, the sliding rollers are uniformly arranged on the surface of the main pipe along the circumference.

[0009] Preferably, the blade power duct is provided with a protective pipe, and the top end of the protective pipe is connected to the bottom end of the main duct.

[0010] Preferably, the traction mechanism includes a movable steel wire, one end of which is connected to the bottom end of the blade power air duct, and the other end extends from the top end of the heating furnace flue.

[0011] Preferably, the ash collection device includes an ash collection cylinder, the top of which is connected to the bottom of the heating furnace flue; the ash collection cylinder is provided with a cleaning bag.

[0012] Preferably, the top of the ash collection cylinder is provided with a diameter-changing tensioning device, and the side wall of the diameter-changing tensioning device is provided with a sealing ring; the diameter-changing tensioning device expands and squeezes the sealing ring and the heating furnace flue to fix the ash collection cylinder.

[0013] Preferably, the ash collection cylinder is equipped with an air bladder, and the output end of the air bladder passes through the ash collection cylinder and is connected to the variable diameter tensioning device to pump air into the variable diameter tensioning device.

[0014] Preferably, the ash collection tube is provided at the inlet of the ash collection cylinder, and a one-way dust removal fan is provided on the ash collection tube. The one-way dust removal fan rotates to blow the collected dust toward the dust removal bag.

[0015] (III) Beneficial Effects The vacuum heating furnace flue cleaning device provided by this utility model ventilates the main duct and uses a wind-driven mechanism to drive the drill bit and variable-diameter wire brush to rotate synchronously. The drill bit is then inserted downwards into the heating furnace flue to clean the dust adhering to the inner wall of the heating furnace. This can thoroughly clean the dust in the heating furnace flue and improve the cleaning effect. At the same time, a dust collection device is installed at the end of the heating furnace flue to collect the dust that falls after cleaning, avoiding dust pollution and improving environmental protection performance. During the ventilation process, the cleaned dust can also be blown into the dust collection device, further improving the recovery effect of the cleaned dust. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the vacuum heating furnace flue cleaning device of this utility model; Figure 2 This is a schematic diagram of the wind power transmission mechanism of the vacuum heating furnace flue cleaning device of this utility model; Figure 3 This is a schematic diagram of the ash collection device structure of the vacuum heating furnace flue cleaning device of this utility model.

[0017] The components include: 1. Drill bit; 2. Transmission rod; 3. Variable diameter wire brush; 4. Pneumatic transmission mechanism; 5. Protective pipe; 6. Moving roller; 7. Paddle-powered air duct; 8. Moving wire; 9. Main duct; 10. Magnetic levitation stator; 11. Magnetic levitation rotor; 12. Fan rotating blade; 13. Dust cleaning duct; 14. Variable diameter tensioning device; 15. Sealing ring; 16. Airbag; 17. Dust collection pipe; 18. One-way dust cleaning fan; 19. Dust collection cylinder; 20. Dust cleaning bag; 21. Heating furnace flue. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this utility model and simplify the description, and is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0020] like Figure 1-3As shown, this utility model provides a vacuum heating furnace flue cleaning device, specifically including: a main pipe 9, with a wind-driven mechanism 4 installed inside the main pipe 9. The top end of the wind-driven mechanism 4 extends out of the top end of the main pipe 9, and the bottom end is located inside the main pipe 9; a drill bit 1 is installed at the top end of the wind-driven mechanism 4, and an annular variable diameter wire brush 3 is installed below the drill bit 1; after air is injected into the main pipe 9, the wind-driven mechanism 4 drives the drill bit 1 and the variable diameter wire brush 3 to rotate. The main pipe 9 mainly provides an installation frame for the device. Under normal circumstances, the outer diameter of the main pipe 9 is smaller than the inner diameter of the pipe to be cleaned. After the wind-driven mechanism and other components are installed inside the main pipe 9, they are lowered into the pipe to be cleaned for cleaning work. The main pipe 9 extends downward into the heating furnace flue 21 along with the drill bit 1. The end of the heating furnace flue 21 is equipped with an ash collection device. The heating furnace flue 21 is the pipe to be cleaned. During operation, the drill bit 1 of the main pipe 9 extends downward from above into the heating furnace flue 21. When the rotating drill bit 1 comes into contact with dust on the inner wall of the heating furnace flue 21, it pushes the dust outwards, thus providing a normal path for the main pipeline 9 to travel along the heating furnace flue 21 and preventing dust inside the heating furnace flue 21 from affecting the movement of the main pipeline 9. Normally, the outer diameter of the border wire brush 3 matches the inner diameter of the heating furnace flue 21. During its movement along the heating furnace flue 21, the variable diameter wire brush 3, under the action of the pneumatic transmission mechanism 4, maintains a rotating state to clean the dust adhering to the inner wall of the heating furnace flue 21. In its rotating state, the brush head of the variable diameter wire brush 3 continuously contacts and rubs against the inner wall of the heating furnace flue 21, brushing the dust off. To accommodate heating furnace flues 21 of different sizes, the variable diameter wire brush 3 is usually detachably connected to the pneumatic transmission mechanism 4 using connection methods such as clips or nuts. Workers can replace the variable diameter wire brush 3 with one of different diameters depending on the inner diameter of the heating furnace flue 21 being cleaned. Since the dimensions of the heating furnace flue 21 need to meet the requirements of national standards, the range of its diameter variation is small. When making spare variable diameter wire brushes 3, it is only necessary to make corresponding variable diameter wire brushes 3 according to national regulations, which results in low production costs.

[0021] During the cleaning of the heating furnace flue 21, due to the large amount of dust, when the power equipment is used as the power source to drive the variable diameter wire brush 3 and the drill bit 1 to rotate, the dust may gradually adhere to the surface of the motor and seep into the motor through the gaps, affecting the normal operation of the motor. At the same time, the motor may generate electric sparks during operation, and there are certain safety hazards in working in the limited space filled with dust inside the heating furnace flue 21.

[0022] In this invention, the wind-powered transmission mechanism 4 and the wind-powered equipment are used together as a power source to drive the device, which can avoid the contact between electric sparks and dust in a confined space and improve the safety of the device. At the same time, the wind-powered transmission mechanism 4 usually uses the airflow blown downward from above the heating furnace flue 21 as a power source. When the airflow drives the wind-powered transmission mechanism 4, it can also blow the swept dust into the dust collection device at the end of the heating furnace flue 21, which facilitates the collection of dust and reduces pollution to the surrounding environment.

[0023] The wind power transmission mechanism 4 includes a magnetic levitation rotor 11 and two magnetic levitation stators 10, which are concentrically arranged with the main pipe 9. The magnetic levitation rotor 11 passes axially through the center of the two magnetic levitation stators 10 and extends out of the top of the main pipe 9. Multiple fan blades 12 are evenly distributed on the magnetic levitation rotor 11. After the airflow passes through the fan blades 12, the fan blades 12 drive the magnetic levitation rotor 11 to rotate synchronously. The two magnetic stators 10 are fixed inside the main pipe 9 to fix the position of the magnetic levitation rotor 11. After the operator places the device into the furnace flue 21, airflow is injected downwards from the top of the furnace flue 21. After the airflow separates from the fan blades 12, it drives the fan blades 12 to rotate, which in turn drives the magnetic levitation rotor 11 to rotate synchronously. Typically, a drill bit 1 and a variable-diameter wire brush 3 are installed at the end of the magnetic levitation rotor 11 that extends out of the main pipe 9. When the magnetic levitation rotor 11 rotates, it drives the drill bit 1 and the variable-diameter wire brush 3 to rotate synchronously.

[0024] It should be noted that both the magnetic levitation rotor 11 and the magnetic levitation stator 10 are magnets. The magnetic levitation rotor 11 is levitated in the middle of the magnetic levitation stator 10 by magnetic force. During use, due to the large amount of dust inside the heating furnace flue 21, the commonly used bearing structure often causes the bearings to jam or seize due to dust seeping into the gaps between the bearings, rendering the device unusable. To avoid the above problems, this invention employs the principle of magnetic levitation, fabricating a magnetically levitated rotor 11 and a magnetically levitated stator 10 that cooperate with each other. Both are magnetic, and the magnetic properties at their contact points are identical. After the magnetically levitated rotor 11 passes through the magnetically levitated stator 10, a gap is created between them under the action of magnetic force. The rotor 11 does not come into contact with the stator 10 during rotation, thus reducing friction between them. Simultaneously, even if dust falls between the rotor 11 and stator 10 during operation, it will not obstruct the rotation of the rotor 11. Instead, it will be carried by the airflow into the heating furnace flue 21 during the rotation of the rotor 11 and the passage of airflow, maintaining the normal operation of the device and extending its service life. To limit the position of the magnetically levitated rotor 11, a pressure cap or other limiting structure can be installed at the top of the main pipe 9, and a matching stepped structure can be machined at the top of the rotor 11 to limit its movement and prevent it from detaching.

[0025] It should be noted that the surface of the magnetic levitation stator 10 is uniformly provided with multiple axially continuous dust removal air ducts 13. During the process of air being supplied to the main pipe 9, the airflow flows through the dust removal air ducts 13 and passes through the wind power transmission mechanism 4, ensuring smooth gas flow in the heating furnace flue 21 and avoiding the problem of device malfunction caused by poor gas flow.

[0026] In addition, multiple sets of rollers are evenly arranged axially on the outer surface of the main pipe 9, each set including multiple sliding rollers 6; in each set, the sliding rollers 6 are evenly arranged circumferentially on the surface of the main pipe 9. When the outer wall of the main pipe 9 contacts the inner wall of the heating furnace flue 21, the sliding rollers 6 contact the heating furnace flue 21. The sliding rollers 6 are universal wheels, capable of rolling in any direction. The sliding rollers 6 counteract the friction between the main pipe 9 and the heating furnace flue 21, thereby preventing friction damage and improving the service life of the device.

[0027] like Figure 1As shown, the main duct 9 is equipped with a paddle-powered air duct 7 and a traction mechanism at its end. One end of the paddle-powered air duct 7 is connected to the main duct 9, and the other end is connected to a fan. The fan, as the wind power equipment in the device, provides high-speed airflow to power the wind power transmission mechanism 4. The paddle-powered air duct 7 guides the high-pressure gas output by the fan to the end of the main duct 9, ensuring that the gas fully acts on the wind power transmission mechanism 4 and avoiding wind power waste. The traction mechanism is mainly used to assist in the recovery of the main duct 9 and other equipment, ensuring that the device can be smoothly recovered after operation.

[0028] The traction mechanism includes a movable steel wire 8, one end of which is connected to the bottom of the paddle-powered air duct 7, and the other end extends from the top of the heating furnace flue duct 21. By using the movable steel wire 8, operators can control the speed at which the device descends into the heating furnace flue duct 21. During device retrieval, pulling the movable steel wire 8 pulls the main pipe 9 out of the top of the heating furnace flue duct 21, thus completing the retrieval of the device.

[0029] It should be noted that a protective pipe 5 is provided outside the blade-driven air duct 7, and the top end of the protective pipe 5 is connected to the bottom end of the main duct 9. The protective pipe 5 is mainly responsible for protecting the blade-driven air duct 7 and the traction mechanism, preventing them from directly contacting and rubbing against the inner wall of the heating furnace flue duct 21 and causing damage.

[0030] like Figure 3 As shown, the ash collection device includes an ash collection cylinder 19, the top of which is connected to the bottom of the heating furnace flue 21. A cleaning bag 20 is provided on the ash collection cylinder 19. The ash collection device is installed at the bottom of the heating furnace flue 21 to collect dust carried out by the airflow after being cleaned by the device, preventing dust from being directly discharged into the surrounding air and causing environmental pollution. After the ash collection cylinder 19 is connected to the heating furnace flue 21, gas flows from the heating furnace flue 21 into the ash collection cylinder 19, thus carrying dust into the ash collection cylinder 19 for collection. The cleaning bag 20 is usually made of a breathable material, such as a burlap sack or filter bag. During the collection process, gas can pass normally through the cleaning bag 20, while the dust carried in the gas is filtered out and left in the cleaning bag 20, thus completing the dust collection. Normally, to adapt to various working conditions, the ash collection cylinder 19 and the ash cleaning bag 20 are detachably connected. When the ash cleaning bag 20 is full, the device can be paused to replace the new ash cleaning bag 20 before restarting the device, which is simple to operate.

[0031] The ash collection cylinder 10 is equipped with a diameter-changing tensioning device 14 at its top end, and a sealing ring 15 is provided on the side wall of the diameter-changing tensioning device 14. The diameter-changing tensioning device 14 expands and compresses the sealing ring 15 and the heating furnace flue 21 to fix the ash collection cylinder 10. The diameter-changing tensioning device 14 is mainly used to connect with the heating furnace flue 21. Since the heating furnace flue 21 has various sizes, the top end of the ash collection cylinder 10 is tubular, and a diameter-changing tensioning device 14 and a sealing ring 15 are provided on the outer wall of the top end. During connection, the diameter-changing tensioning device 14 is controlled to expand and compress the inner wall of the heating furnace flue 21 through the sealing ring 15, and the connection between the ash collection cylinder 10 and the heating furnace flue 21 is completed by the friction between the two.

[0032] It should be noted that the ash collection cylinder 19 is equipped with an air bladder 16. The output end of the air bladder 16 passes through the ash collection cylinder 19 and connects to the variable diameter tensioning device 14, inflating the device. The air bladder 16 is a common inflation device, often used in various technical fields such as manual inflation devices in medical blood pressure monitors. By repeatedly pressing the air bladder 16, gas is continuously injected into the variable diameter tensioning device 14, causing it to inflate. Depending on the work requirements and conditions, the air bladder 16 can be replaced with other manual or electric inflation devices, such as air pumps, to adapt to different working environments.

[0033] In addition, a dust collection pipe 17 is provided at the inlet of the dust collection cylinder 19, and a one-way dust removal fan 18 is provided on the dust collection pipe 17. The one-way dust removal fan 18 rotates to blow the collected dust toward the dust removal bag 20. The dust collection pipe 17 is usually connected to the inlet of the dust collection cylinder 19, and extends inward from the inlet of the dust collection cylinder 19. When dust enters the dust collection cylinder 19 from the inlet, it will gradually enter the dust collection cylinder 19 along the dust collection pipe 17. After the one-way dust removal fan 18 rotates, it can generate an airflow that blows toward the dust removal bag 20, carrying the dust in the dust collection cylinder 19 into the dust removal bag 20, avoiding the problem that the remaining gas is insufficient to carry the dust completely into the dust removal bag 20 due to the excessive length of the heating furnace flue pipe 21.

[0034] The vacuum heating furnace flue cleaning device provided by this utility model uses a wind-driven mechanism to drive the drill bit and the variable-diameter steel wire brush to rotate synchronously. Then, the drill bit is inserted downward into the heating furnace flue to clean the dust adhering to the inner wall of the heating furnace, thus thoroughly cleaning the dust inside the heating furnace flue. The specific operation process of this device is as follows: Step 1: Select appropriate components according to the work requirements and assemble the device according to its structure. Step Two: Insert the drill bit of the main pipeline downwards into the heating furnace flue pipe, and start the gas supply equipment to inject gas into the heating furnace flue pipe from above. At this time, the gas flows downwards and drives the wind-driven mechanism to rotate. The wind-driven mechanism drives the drill bit and the variable-diameter wire brush to rotate synchronously. The drill bit pushes the dust it comes into contact with to the surrounding area, and the variable-diameter wire brush cleans the dust off the inner wall of the heating furnace flue pipe. The cleaned dust is carried by the gas flow to the dust collection device at the end of the heating furnace flue pipe for collection.

[0035] Step 3: When the heating furnace flue is too long, resulting in insufficient airflow at the end of the flue, start the one-way cleaning fan in the ash collection device. The one-way cleaning fan rotates to generate airflow towards the cleaning bag, carrying the dust that has entered the ash collection device into the cleaning bag.

[0036] Step 4: After cleaning, stop the gas supply equipment and retrieve the device using a traction mechanism. During this process, workers pull the moving steel cable to retrieve the device from the top of the heating furnace flue.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 ash removal device for the flue gas pipes of a vacuum heating furnace, characterized in that, include: The main pipe (9) is equipped with a wind-driven transmission mechanism (4). The top end of the wind-driven transmission mechanism (4) extends out of the top end of the main pipe (9), and the bottom end is located inside the main pipe (9). The top end of the wind-driven transmission mechanism (4) is equipped with a drill bit (1), and a ring-shaped variable diameter wire brush (3) is provided below the drill bit (1). After air is injected into the main pipe (9), the wind-driven transmission mechanism (4) drives the drill bit (1) and the variable diameter wire brush (3) to rotate. The end of the main pipe (9) is equipped with a blade-powered air duct (7) and a traction mechanism. One end of the blade-powered air duct (7) is connected to the main pipe (9), and the other end is connected to the fan. The main pipe (9) extends downward into the heating furnace flue (21) along with the drill bit (1). The end of the heating furnace flue (21) is equipped with an ash collection device.

2. The vacuum heating furnace flue cleaning device according to claim 1, characterized in that, The wind power transmission mechanism (4) includes a magnetic levitation rotor (11) and two magnetic levitation stators (10), the two magnetic levitation stators (10) are arranged concentrically with the main pipe (9); the magnetic levitation rotor (11) passes through the center of the two magnetic levitation stators (10) along the axial direction and its top extends out of the top of the main pipe (9); a plurality of fan rotating blades (12) are evenly provided on the magnetic levitation rotor (11).

3. The vacuum heating furnace flue cleaning device according to claim 2, characterized in that, Both the magnetic levitation rotor (11) and the magnetic levitation stator (10) are magnets. The magnetic levitation rotor (11) and the magnetic levitation stator (10) are magnetically assembled to make the magnetic levitation rotor (11) levitate in the middle of the magnetic levitation stator (10).

4. The vacuum heating furnace flue cleaning device according to claim 2 or 3, characterized in that, The magnetic levitation stator (10) has a plurality of axially continuous dust removal air ducts (13) uniformly arranged on its surface.

5. The vacuum heating furnace flue cleaning device according to claim 1, characterized in that, The outer surface of the main pipe (9) is uniformly provided with multiple sets of rollers along the axial direction. Each set of rollers includes multiple sliding rollers (6). In each set of rollers, the sliding rollers (6) are uniformly arranged on the surface of the main pipe (9) along the circumference.

6. The vacuum heating furnace flue cleaning device according to claim 1, characterized in that, The blade power duct (7) is provided with a protective pipe (5), and the top end of the protective pipe (5) is connected to the bottom end of the main duct (9).

7. The vacuum heating furnace flue cleaning device according to claim 1, characterized in that, The traction mechanism includes a movable steel wire (8), one end of which is connected to the bottom end of the blade power air pipe (7), and the other end extends from the top end of the heating furnace flue pipe (21).

8. The vacuum heating furnace flue cleaning device according to claim 1, characterized in that, The ash collection device includes an ash collection cylinder (19), the top of which is connected to the bottom of the heating furnace flue (21); the ash collection cylinder (19) is provided with a cleaning bag (20).

9. The vacuum heating furnace flue cleaning device according to claim 8, characterized in that, The top of the ash collection cylinder (19) is provided with a variable diameter tensioning device (14), and the side wall of the variable diameter tensioning device (14) is provided with a sealing ring (15); the variable diameter tensioning device (14) expands and squeezes the sealing ring (15) and the heating furnace flue (21) to fix the ash collection cylinder (19).

10. The vacuum heating furnace flue cleaning device according to claim 9, characterized in that, The ash collection cylinder (19) is equipped with an air bag (16). The output end of the air bag (16) passes through the ash collection cylinder (19) and is connected to the variable diameter tensioning device (14) to pump air into the variable diameter tensioning device (14).

11. The vacuum heating furnace flue cleaning device according to any one of claims 8 to 10, characterized in that, The ash collection tube (19) is provided with an ash collection pipe (17) at its inlet. The ash collection pipe (17) is provided with a one-way dust cleaning fan (18). The one-way dust cleaning fan (18) rotates to blow the collected dust toward the dust cleaning bag (20).

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