Fire extinguisher bottle body cleaning and strip pasting device

By designing a fire extinguisher bottle cleaning and labeling device, a rotating cleaning mechanism and cleaning brush are used to automatically clean the dry powder at the bottle neck during the labeling process, solving the problem of residual dry powder at the bottle neck and improving cleaning efficiency and device adaptability.

CN223962409UActive Publication Date: 2026-03-03NINGBO HUI YONG JU FIRE-FIGHTING EQUIP MFG CO LTD
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Patent Information

Application Number
CN202520746712.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-18
Publication Date
2026-03-03
Estimated Expiration
2035-04-18

AI Technical Summary

Technical Problem

In existing technologies, dry powder fire extinguishers often have residual dry powder at the neck of the bottle after filling, which affects subsequent test data and requires manual wiping and cleaning, which is inefficient and inconvenient.

Method used

Design a fire extinguisher bottle cleaning and labeling device, including a rotating cleaning mechanism and a cleaning brush. The bottle is rotated by a drive roller, and the cleaning brush cleans the dry powder at the neck of the bottle during the labeling process. Combined with a detachable cleaning brush and an adjustable slider structure, it can be adapted to different models of fire extinguishers.

Benefits of technology

It enables automatic cleaning of dry powder from the neck of fire extinguisher cylinders during the labeling process, improving cleaning efficiency and device durability, adapting to different types of fire extinguishers, and reducing manual intervention.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a fire extinguisher bottle body cleaning and strip pasting device which comprises a conveying table used for conveying fire extinguisher bottle bodies, a rotating table arranged on the conveying table, a strip pasting assembly arranged on one side of the conveying table and rotary cleaning mechanisms installed on the two sides of the conveying table. The rotary cleaning mechanism comprises a first fixing frame located on one side of the conveying table, a driving roller rotationally installed on the first fixing frame, a driving motor installed on the first fixing frame and used for driving the driving roller to rotate, and a driven roller assembly located on the other side of the conveying table and arranged corresponding to the driving roller. The driving part is used for driving the driven roller assembly to move transversely; the cleaning assembly is mounted on the first fixing frame; the cleaning assembly comprises a cleaning base installed on the first fixing frame and a cleaning brush detachably installed on the cleaning base. The device has the effect of cleaning dry powder at the neck opening of the fire extinguisher bottle body in the strip pasting process.
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Description

Technical Field

[0001] This application relates to the field of fire extinguisher manufacturing equipment, and in particular to a fire extinguisher bottle cleaning and labeling device. Background Technology

[0002] Dry powder fire extinguishers are fire-fighting devices that use dry powder extinguishing agent as their core component. They extinguish fires quickly by spraying dry powder through high-pressure gas. Currently, in the production of dry powder fire extinguishers, a filling machine is typically used to fill the extinguisher bottle with dry powder. Afterward, a label is affixed to the bottle using a labeling device, and then the extinguisher is tested.

[0003] Currently, when filling machines dispense dry powder into dry powder fire extinguisher bottles, a small amount of dry powder usually remains at the neck of the bottle. To avoid this residual dry powder affecting subsequent fire extinguisher testing data, the current practice is to have testing personnel wipe the neck of the fire extinguisher with a sterilized towel after labeling to remove this residual dry powder.

[0004] In view of the above-mentioned related technologies, the inventor believes that there is a need to provide a fire extinguisher bottle cleaning and labeling device that cleans the dry powder at the neck of the fire extinguisher bottle during the labeling process. Utility Model Content

[0005] This application provides a fire extinguisher bottle cleaning and labeling device, which can clean the dry powder at the neck of the fire extinguisher bottle during the process of applying the label to the fire extinguisher bottle.

[0006] The fire extinguisher bottle cleaning strip device provided in this application adopts the following technical solution:

[0007] A fire extinguisher bottle cleaning and labeling device includes a conveyor platform for conveying fire extinguisher bottles, a rotating platform arranged on the conveyor platform for arranging fire extinguisher bottles, a labeling assembly arranged on one side of the conveyor platform, and a rotating cleaning mechanism installed on both sides of the conveyor platform. The rotating cleaning mechanism includes a first fixed frame located on one side of the conveyor platform, a drive roller rotatably mounted on the first fixed frame, a drive motor mounted on the first fixed frame for driving the drive roller to rotate, a driven roller assembly located on the other side of the conveyor platform and corresponding to the drive roller, a drive member for driving the driven roller assembly to move laterally, and a cleaning assembly installed on the first fixed frame for cleaning the neck of the fire extinguisher bottle. The cleaning assembly includes a cleaning seat installed on the first fixed frame and a cleaning brush detachably installed on the cleaning seat.

[0008] By adopting the above technical solution, when the fire extinguisher bottle cleaning and labeling device is running, the rotating cleaning mechanism located on both sides of the conveyor table will clamp the fire extinguisher bottle, and under the drive of the drive motor, the drive roller will drive the fire extinguisher bottle and the driven roller assembly to rotate. During the rotation of the fire extinguisher, the labeling assembly will label the fire extinguisher bottle, and at the same time, the cleaning brush located at the top of the first fixed frame will clean the neck of the fire extinguisher bottle, thereby realizing the cleaning of dry powder at the neck of the fire extinguisher bottle during the labeling process.

[0009] Optionally, the top of the cleaning seat is provided with a locking screw hole for locking the cleaning brush, and a locking bolt is threaded into the locking screw hole. The handle of the cleaning brush is provided with a locking through hole for arranging the locking bolt.

[0010] By adopting the above technical solution, a locking screw hole is opened on the top of the cleaning seat and a locking bolt is set. A locking through hole is opened on the brush handle of the cleaning brush, which is opposite to the locking screw hole and is used for locking by the locking bolt. This enables the locking bolt to detachably install the cleaning brush on the top of the cleaning seat, thereby facilitating the regular replacement of the cleaning brush and helping to improve the durability of the cleaning components.

[0011] Optionally, the cleaning seat has a mounting slot on the side facing the conveyor table for inserting the handle of the cleaning brush, and the cleaning seat is equipped with mounting bolts for locking the handle of the cleaning brush into the mounting slot.

[0012] By adopting the above technical solution, an installation slot for inserting the brush handle of the cleaning brush is opened on the front side of the cleaning seat, and an installation bolt for locking the brush handle of the cleaning brush is set on the top of the cleaning seat. This realizes the insertion and installation of the cleaning brush into the cleaning seat, which facilitates the regular replacement of the cleaning brush and helps to improve the durability of the cleaning components.

[0013] Optionally, the cleaning seat is laterally slidably mounted on the top of the first fixed frame, the first fixed frame has a laterally arranged adjusting groove, and the cleaning seat has an adjusting slider slidably arranged in the adjusting groove; the bottom of the adjusting slider is provided with a plunger hole and a ball spring plunger is installed in the plunger hole; the bottom surface of the adjusting groove is provided with a plurality of locking holes arranged at intervals along the length direction for the plunger balls of the ball spring plunger to engage.

[0014] By adopting the above technical solution, an adjusting slider is set at the bottom of the cleaning seat and an adjusting groove is set at the top of the first fixed frame for arranging the adjusting slider, thus realizing the sliding installation of the cleaning seat on the top of the first fixed frame; a plunger hole is opened at the bottom of the adjusting slider and a ball spring plunger is arranged, and multiple snap-fit ​​holes are arranged at intervals on the bottom surface of the adjusting groove, thus realizing the locking of the cleaning seat in different positions of the first fixed frame, which helps to improve the compatibility of the cleaning seat with different models of cleaning brushes.

[0015] Optionally, the drive component includes a second fixed frame mounted on the ground and a drive cylinder mounted on the second fixed frame; the piston rod of the drive cylinder is arranged horizontally and connected to the driven roller assembly.

[0016] By adopting the above technical solution, the driven roller assembly moves horizontally with the piston rod of the driven cylinder under the drive cylinder, realizing the cooperation between the driven roller assembly and the drive roller to clamp the fire extinguisher, which helps to improve the working efficiency of the rotating cleaning mechanism.

[0017] Optionally, the driven roller assembly includes a mounting side plate, a first bracket mounted on the mounting side plate, a first driven roller rotatably mounted on the first bracket, a second bracket mounted on the mounting side plate, and a second driven roller rotatably mounted on the second bracket; the first driven roller and the second driven roller are arranged symmetrically about the drive roller.

[0018] By adopting the above technical solution, the specific structure of the driven roller assembly is disclosed. A first bracket and a second bracket are symmetrically arranged on the side of the mounting plate facing the drive roller about the drive roller. The first driven roller is rotatably mounted on the first bracket, and the second driven roller is rotatably mounted on the second bracket. This helps to achieve the cooperative arrangement of the driven roller assembly and the drive roller, and helps to improve the working efficiency of the rotary cleaning mechanism.

[0019] Optionally, both the first bracket and the second bracket are slidably mounted on the mounting side plate along a conveying direction parallel to the conveying table.

[0020] By adopting the above technical solution, the first bracket and the second bracket are slidably installed on the mounting side plate, so that the distance between the first driven roller and the second driven roller can be adjusted, which helps to improve the compatibility of the cleaning strip device with different types of fire extinguishers.

[0021] Optionally, the rotary table includes a rotary base, a rotary plate rotatably mounted on the rotary base, and a rotary bearing supported between the rotary base and the rotary plate.

[0022] By adopting the above technical solution, the specific structure of the rotating table is disclosed. A rotating bearing is set between the rotating base and the rotating plate, so that the fire extinguisher rotates more smoothly under the drive of the drive roller, thereby helping to improve the working efficiency of the fire extinguisher bottle cleaning strip device.

[0023] Optionally, a support block may be detachably installed on the bottom of the rotating base.

[0024] By adopting the above technical solution, a detachable support block is set at the bottom of the rotating base, which makes it easy to replace the support block of different thickness when adapting to different types of fire extinguishers, thus helping to improve the compatibility of the cleaning strip device with different types of fire extinguishers.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. A fire extinguisher bottle cleaning and labeling device, wherein the fire extinguisher bottle is clamped by a rotating cleaning mechanism located on both sides of a conveyor table, and the drive roller drives the fire extinguisher bottle and the driven roller assembly to rotate under the drive of a drive motor. During the rotation of the fire extinguisher, the labeling assembly labels the fire extinguisher bottle, and at the same time, the cleaning brush located at the top of the first fixed frame cleans the neck of the fire extinguisher bottle, thereby achieving the cleaning of dry powder at the neck of the fire extinguisher bottle during the labeling process;

[0027] 2. By setting an adjusting slider at the bottom of the cleaning seat and setting an adjusting groove at the top of the first fixed frame for arranging the adjusting slider, the cleaning seat can be slidably installed on the top of the first fixed frame; by opening a plunger hole at the bottom of the adjusting slider and arranging a ball-head spring plunger, and by arranging multiple snap-fit ​​holes at intervals on the bottom surface of the adjusting groove, the cleaning seat can be locked in different positions of the first fixed frame, which helps to improve the compatibility of the cleaning seat with different models of cleaning brushes;

[0028] 3. A detachable support block is installed at the bottom of the rotating base, which makes it easy to replace the support block with one of different thickness when adapting to different types of fire extinguishers, thus improving the compatibility of the cleaning strip device with different types of fire extinguishers. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the fire extinguisher bottle cleaning strip device in Example 1.

[0030] Figure 2 This is an enlarged schematic diagram of the cleaning component at point A in Example 1.

[0031] Figure 3 This is a schematic diagram of the cooperation between the cleaning component and the first fixing frame in Embodiment 1.

[0032] Figure 4This is a schematic diagram of the fit between the ball-head spring plunger and the snap-fit ​​hole in Example 1.

[0033] Figure 5 This is a schematic diagram of the strip assembly in Embodiment 1.

[0034] Figure 6 This is a schematic diagram of the driven roller assembly and the driving component in Example 1.

[0035] Figure 7 This is a cross-sectional schematic diagram of the rotary table in Example 1.

[0036] Figure 8 This is a schematic diagram of the cooperation between the cleaning seat and the cleaning brush in Example 2.

[0037] Explanation of reference numerals in the attached drawings: 1. Conveyor table; 2. Rotary table; 21. Rotary base; 211. First screw hole; 22. Rotary plate; 221. Arrangement groove; 23. Rotary bearing; 24. Support block; 241. Limiting post; 3. Labeling assembly; 31. Mounting base; 32. Discharge roller; 33. Rolling roller; 34. Label guide plate; 35. First servo motor; 36. Second servo motor; 4. Rotary cleaning mechanism; 41. First fixing frame; 411. Adjusting slide; 412. Snap-fit ​​hole; 42. Drive roller; 43. Drive motor; 44. Driven roller assembly; 441. Mounting side plate; 4411. First oblong hole; 4412. Second oblong hole; 442. First support... Frame; 4421, First driven roller; 4422, First sliding member; 443, Second support; 4431, Second driven roller; 4432, Second sliding member; 45, Drive member; 451, Second fixed frame; 452, Drive cylinder; 46, Cleaning assembly; 461, Cleaning seat; 4611, Locking screw hole; 4612, Locking bolt; 4613, Adjusting slider; 4614, Plunger hole; 4615, Ball spring plunger; 46151, Plunger housing; 46152, Plunger spring; 46153, Plunger ball; 4616, Mounting slot; 4617, Mounting screw hole; 4618, Mounting bolt; 462, Cleaning brush; 4621, Locking through hole. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings 1-8.

[0039] Example 1

[0040] This application discloses a fire extinguisher bottle cleaning strip device. (Refer to...) Figure 1 and Figure 2The fire extinguisher bottle cleaning and labeling device includes a conveyor platform 1, a rotating platform 2 arranged on the conveyor platform 1 for arranging fire extinguisher bottles, a labeling assembly 3 arranged on one side of the conveyor platform 1, and a rotating cleaning mechanism 4 installed on both sides of the conveyor platform 1. The rotating cleaning mechanism 4 includes a first fixed frame 41 located on one side of the conveyor platform 1, a drive roller 42 rotatably mounted on the first fixed frame 41, a drive motor 43 mounted on the first fixed frame 41 for driving the drive roller 42 to rotate, a driven roller assembly 44 located on the other side of the conveyor platform 1 and arranged corresponding to the drive roller 42, a drive component 45 for driving the driven roller assembly 44 to move laterally, and a cleaning assembly 46 installed on the first fixed frame 41 for cleaning the neck of the fire extinguisher bottle.

[0041] Reference Figure 2 and Figure 3 The cleaning assembly 46 includes a cleaning seat 461 mounted on a first fixing frame 41 and a cleaning brush 462 detachably mounted on the cleaning seat 461. In this embodiment, the top of the cleaning seat 461 has a locking screw hole 4611 for locking the cleaning brush 462, and a locking bolt 4612 is threaded into the locking screw hole 4611. The handle of the cleaning brush 462 has a locking through hole 4621 for accommodating the locking bolt 4612, thereby realizing the detachable installation of the cleaning brush 462 on the cleaning seat 461.

[0042] Reference Figure 3 and Figure 4 The cleaning seat 461 is laterally slidably mounted on the top of the first fixed frame 41. The first fixed frame 41 has a laterally arranged adjusting groove 411, and the cleaning seat 461 has an adjusting slider 4613 slidably arranged within the adjusting groove 411. The bottom of the adjusting slider 4613 has a plunger hole 4614, and a ball spring plunger 4615 is installed in the plunger hole 4614. The ball spring plunger 4615 includes a plunger housing 46151, a plunger spring 46152, and a plunger ball 46153. One end of the plunger spring 46152 abuts against the bottom of the inner cavity of the plunger housing 46151, and the other end abuts against the plunger ball 46153, so that the plunger ball 46153 always tends to abut against the opening of the plunger housing 46151. The bottom of the adjusting groove 411 is provided with a plurality of locking holes 412 arranged at intervals along its length for the piston balls 46153 of the ball spring piston 4615 to engage. In this embodiment, the adjusting groove 411 is a T-shaped groove, and the adjusting slider 4613 is a T-shaped slider adapted to it.

[0043] Reference Figure 5The label assembly 3 includes a mounting base 31 arranged on the same side as the first fixing frame 41, a dispensing roller 32 vertically arranged on the top of the mounting base 31, a winding roller 33 vertically arranged on the top of the mounting base 31 for receiving the label strip output by the dispensing roller 32, a label guide plate 34 installed between the dispensing roller 32 and the winding roller 33 for applying the label to the fire extinguisher bottle, a first servo motor 35 for driving the dispensing roller 32 to rotate, and a second servo motor 36 for driving the winding roller 33 to rotate.

[0044] Reference Figure 6 The driven roller assembly 44 includes a mounting side plate 441, a first bracket 442 mounted on the mounting side plate 441, a first driven roller 4421 rotatably mounted on the first bracket 442, a second bracket 443 mounted on the mounting side plate 441, and a second driven roller 4431 rotatably mounted on the second bracket 443. The mounting side plate 441 has two first oblong holes 4411 for sliding arrangement of the first bracket 442 and two second oblong holes 4412 for sliding arrangement of the second bracket 443. Both the two first oblong holes 4411 and the two second oblong holes 4412 are arranged parallel to the conveying direction of the conveyor table 1. The two first oblong holes 4411 are symmetrically arranged vertically on one side of the mounting side plate 441, and the two second oblong holes 4412 are symmetrically arranged vertically on the other side of the mounting side plate 441. The back of the first bracket 442 has two first sliding members 4422 that mate one-to-one with the two first oblong holes 4411, and the back of the second bracket 443 has two second sliding members 4432 that mate one-to-one with the two second oblong holes 4412. In this embodiment, a cleaning assembly 46 is also installed on the top of the first bracket 442. The cleaning assembly 46 on the first bracket 442 is symmetrically arranged with the cleaning assembly 46 on the first fixing frame 41.

[0045] Reference Figure 6 The drive unit 45 includes a second fixed frame 451 mounted on the ground and a drive cylinder 452 mounted on the second fixed frame 451. The piston rod of the drive cylinder 452 is arranged horizontally and connected to the back of the mounting side plate 441.

[0046] Reference Figure 7The rotating platform 2 includes a rotating base 21, a rotating plate 22 rotatably mounted on the rotating base 21, and a rotating bearing 23 supporting the rotating base 21 and the rotating plate 22. A detachable support block 24 is also provided at the bottom of the rotating base 21. In this embodiment, the top of the rotating plate has an arrangement groove 221 for arranging the fire extinguisher cylinder. The top of the support block has a limiting post 241, and the bottom of the rotating base 21 has a first screw hole 211 for locking the limiting post 241. The limiting post 241 on the top of the support block 24 is positioned opposite the first screw hole 211. The support block 24 is rotatably locked to the bottom of the rotating base 21 by the limiting post 241, thus enabling the detachable installation of the support block 24 on the rotating base 21, thereby improving the compatibility of the rotating platform 2 with different types of fire extinguishers.

[0047] The implementation principle of the fire extinguisher bottle cleaning and labeling device in this application embodiment is as follows: When the fire extinguisher bottle cleaning and labeling device is running, the operator first places the fire extinguisher on the rotating table 2. The fire extinguisher is conveyed to the rotating cleaning mechanism 4 via the conveyor belt of the conveyor table 1. The rotating cleaning mechanism 4 located on both sides of the conveyor table 1 will clamp the fire extinguisher bottle. Under the drive of the drive motor 43, the drive roller 42 drives the fire extinguisher bottle and the driven roller assembly 44 to rotate. During the rotation of the fire extinguisher, the labeling assembly 3 labels the fire extinguisher bottle. At the same time, the cleaning brush 462 located at the top of the first fixed frame 41 cleans the neck of the fire extinguisher bottle, thereby realizing the cleaning of dry powder at the neck of the fire extinguisher bottle during the labeling process.

[0048] Example 2

[0049] Except for the different mating structure of the cleaning seat 461 and the cleaning brush 462, the rest of the structure of this embodiment is the same as the fire extinguisher bottle cleaning strip device of Embodiment 1.

[0050] Reference Figure 8 The cleaning base 461 has a mounting slot 4616 on its side facing the conveyor table 1 for inserting the handle of the cleaning brush 462. The top of the cleaning base 461 has a mounting screw hole 4617 and a mounting bolt 4618 for locking the handle of the cleaning brush 462 into the mounting slot 4616. By inserting the handle of the cleaning brush 462 into the mounting slot 4616 and locking it with the mounting bolt 4618 on the top of the cleaning base 461, the cleaning brush 462 is successfully installed in the cleaning base 461. This facilitates regular replacement of the cleaning brush and helps improve the durability of the cleaning assembly 46.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fire extinguisher cylinder cleaning tape device, comprising: The application relates to a device for transporting fire extinguisher bottles, which comprises a conveying table (1) for conveying fire extinguisher bottles, a rotating table (2) arranged on the conveying table (1) and used for arranging fire extinguisher bottles, a strip pasting assembly (3) arranged on one side of the conveying table (1), and rotating cleaning mechanisms (4) installed on both sides of the conveying table (1); the rotating cleaning mechanisms (4) comprise a first fixed frame (41) located on one side of the conveying table (1), a driving roller (42) rotatably installed on the first fixed frame (41), a driving motor (43) installed on the first fixed frame (41) and used for driving the driving roller (42) to rotate, a driven roller assembly (44) located on the other side of the conveying table (1) and arranged in correspondence with the driving roller (42), a driving member (45) used for driving the driven roller assembly (44) to move laterally, and a cleaning assembly (46) installed on the first fixed frame (41) and used for cleaning the neck of a fire extinguisher bottle; the cleaning assembly (46) comprises a cleaning seat (461) installed on the first fixed frame (41) and a cleaning brush (462) detachably installed on the cleaning seat (461).

2. A fire extinguisher cylinder cleaning tape device according to claim 1, wherein, The top of the cleaning seat (461) is provided with a locking screw hole (4611) for locking the cleaning brush (462), and a locking bolt (4612) is threadedly installed at the locking screw hole (4611); the handle of the cleaning brush (462) is provided with a locking through hole (4621) for arranging the locking bolt (4612).

3. A fire extinguisher cylinder cleaning tape device as defined in claim 1, wherein, The side of the cleaning seat (461) facing the conveying table (1) is provided with a mounting slot (4616) for inserting the handle of the cleaning brush (462); the cleaning seat (461) is provided with a mounting bolt (4618) for locking the handle of the cleaning brush (462) in the mounting slot (4616).

4. A fire extinguisher cylinder cleaning tape device according to claim 2 or 3, wherein, The cleaning seat (461) is transversely slidably installed on the top of the first fixed frame (41); the first fixed frame (41) is provided with an adjusting sliding groove (411) arranged transversely; the cleaning seat (461) is provided with an adjusting sliding block (4613) slidably arranged in the adjusting sliding groove (411); the bottom of the adjusting sliding block (4613) is provided with a plunger hole (4614) in which a ball head spring plunger (4615) is installed; the bottom surface of the adjusting sliding groove (411) is provided with a plurality of clamping holes (412) for clamping the plunger ball (46153) of the ball head spring plunger (4615) at intervals along the length direction.

5. A fire extinguisher cylinder cleaning tape device as defined in claim 1, wherein, The driving member (45) comprises a second fixed frame (451) installed on the ground and a driving air cylinder (452) installed on the second fixed frame (451); the piston rod of the driving air cylinder (452) is arranged horizontally and connected to the driven roller assembly (44).

6. A fire extinguisher cylinder cleaning tape device as defined in claim 5, wherein, The driven roller assembly (44) comprises a mounting side plate (441), a first support (442) mounted on the mounting side plate (441), a first driven roller (4421) rotatably mounted on the first support (442), a second support (443) mounted on the mounting side plate (441), and a second driven roller (4431) rotatably mounted on the second support (443); the first driven roller (4421) and the second driven roller (4431) are symmetrically arranged about the driving roller (42).

7. A fire extinguisher cylinder cleaning tape device as defined in claim 6, wherein, The first support (442) and the second support (443) are slidably mounted on the mounting side plate (441) in parallel to the conveying direction of the conveying table (1).

8. A fire extinguisher cylinder cleaning tape device as defined in claim 1, wherein, The rotating table (2) comprises a rotating base (21), a rotating plate (22) rotatably mounted on the rotating base (21), and a rotating bearing (23) supported between the rotating base (21) and the rotating plate (22).

9. A fire extinguisher cylinder cleaning tape device as defined in claim 8, wherein, A supporting block (24) is detachably mounted on the bottom of the rotating base (21).