Automatic film and rust removing device for liquefied petroleum gas steel cylinder

Abstract

The utility model relates to an automatic film and rust removing device for a liquefied petroleum gas steel cylinder, which comprises a rack and a steel cylinder inner opening mechanism arranged on the rack, the steel cylinder inner opening mechanism comprises a first rotating shaft and a clamping seat, the first rotating shaft is vertically and rotatably connected with the rack, and the clamping seat is in transmission connection with the first rotating shaft. The inner rust removal round steel wire brush mechanism is arranged opposite to the steel cylinder inner opening mechanism, the inner rust removal round steel wire brush mechanism comprises a second rotating shaft and an inner rust removal round steel wire brush in transmission connection with the second rotating shaft, and the inner rust removal round steel wire brush is used for being in friction contact with the inner wall of the steel cylinder workpiece; and the outer rust removal round steel wire brush mechanism is arranged corresponding to the inner rust removal round steel wire brush mechanism and comprises a third rotating shaft, an outer rust removal round steel wire brush in transmission connection with the third rotating shaft and a film removal steel wire rotationally connected with the third rotating shaft. According to the automatic film and rust removing device for the liquefied petroleum gas steel cylinder disclosed by the utility model, the working procedure of automatically removing a film and rust of a steel cylinder workpiece is realized, and the labor investment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automated production equipment for liquefied petroleum gas cylinders, in particular to an automatic film and rust removal device for liquefied petroleum gas cylinders. Background Art

[0002] As an important container for storing and transporting liquefied petroleum gas, the safety and durability of liquefied petroleum gas cylinders are of paramount importance. Figure 7 As shown, the two head workpieces of the steel cylinder will be coated during the stretching process, and the cylinder body will need to be de-filmed and de-rusted due to welding quality requirements.

[0003] Current cylinder cleaning methods rely primarily on manual film and rust removal, a method that is not only inefficient but also poses a health risk to operators due to the harsh operating environment. Furthermore, manual operation struggles to ensure consistent cleaning quality, leading to incomplete cleaning of both the cylinder's interior and exterior, compromising weld quality requirements. Utility Model Content

[0004] The utility model provides an automatic film and rust removal device for a liquefied petroleum gas cylinder, aiming to at least solve one of the technical problems existing in the prior art.

[0005] The technical solution of the utility model is an automatic film and rust removal device for liquefied petroleum gas cylinders, which includes: a frame, a cylinder internal expansion mechanism arranged on the frame, the cylinder internal expansion mechanism including a first rotating shaft connected to the frame for vertical rotation and a holder connected to the first rotating shaft for transmission, the holder is used to place the cylinder workpiece, an internal rust removal circular wire brush mechanism arranged opposite to the cylinder internal expansion mechanism, the internal rust removal circular wire brush mechanism including a second rotating shaft and an internal rust removal circular wire brush connected to the second rotating shaft for transmission, the internal rust removal circular wire brush is used to frictionally contact with the inner wall of the cylinder workpiece, and is opposite to the internal rust removal circular wire brush mechanism. An external rust removal circular wire brush mechanism should be set up, and the external rust removal circular wire brush mechanism includes a third rotating shaft, an external rust removal circular wire brush transmission-connected to the third rotating shaft, and a film removal wire rotationally connected to the third rotating shaft, the external rust removal circular wire brush is used for frictional contact with the outer wall of the cylinder workpiece, and the film removal wire is used for contacting the outer wall of the cylinder workpiece to remove film and rust, wherein the second rotating shaft is transmission-connected to the second transmission member, the third rotating shaft is transmission-connected to the third transmission member, the second transmission member and the third transmission member are respectively transmission-connected to the fourth transmission assembly, and the power input end of the fourth transmission assembly is transmission-connected to the drive motor.

[0006] Furthermore, it also includes a horizontal driving mechanism, which is connected to the external rust removal circular wire brush mechanism through a third mounting plate to allow the horizontal driving mechanism to drive the external rust removal circular wire brush mechanism away from or close to the outer wall of the cylinder workpiece.

[0007] Furthermore, the horizontal drive mechanism includes a first cylinder arranged on the frame and a first drive rod connected to the push rod of the first cylinder. The end of the first drive rod is movably connected to the third mounting plate through a first movable bolt, and the third mounting plate is sleeved on the third rotating shaft and the fourth transmission assembly.

[0008] Furthermore, the horizontal drive mechanism includes a second drive rod connected to the push rod of the first cylinder, the end of the second drive rod is movably connected to the second mounting plate through a second movable bolt, and the second mounting plate is sleeved on the second rotating shaft and the fourth transmission assembly, wherein the third mounting plate and the second mounting plate are connected by multiple first elastic members.

[0009] Furthermore, it also includes: a reducer, the motor shaft of the drive motor is connected to the power input end of the reducer, the power output end of the reducer is connected to the first rotating shaft, and the motor shaft of the drive motor is also connected to the power input end of the fourth transmission assembly through a bevel gear assembly.

[0010] Furthermore, the cylinder internal expansion mechanism includes a card block, a second elastic member and a push block. The middle part of the card seat is provided with a first installation cavity running up and down and multiple pairs of second installation cavities running circumferentially and connected to the first installation cavity. The push block is arranged in the first installation cavity, and the connecting part of the push block is arranged in the second installation cavity. The second elastic member is arranged between the connecting part of the push block and the inner wall of the second installation cavity. When the push block is at the bottom of the first installation cavity, it contacts and limits the end of the connecting part of the push block. The push block is connected to the second cylinder through a push rod to allow the push rod to push the push block to move up and down in the first installation cavity. The connecting part of the push block contacts or separates from the push block. The second cylinder is installed at the bottom of the frame.

[0011] Furthermore, the shape of the outer edge of the clamping block matches the shape of the inner wall of the cylinder, and a wear-resistant part is provided on the outer edge of the clamping block.

[0012] Furthermore, the inner rust removal circular wire brush and the outer rust removal circular wire brush are circular wire brushes, and the inner rust removal circular wire brush and the outer rust removal circular wire brush are respectively installed on the second rotating shaft and the third rotating shaft.

[0013] Furthermore, a protective cover is installed on the frame, and one end of the protective cover is hinged to the frame to allow the protective cover to flip on the frame.

[0014] Furthermore, the protective cover is provided with a plurality of blowing pipes for blowing off the film on the cylinder workpiece.

[0015] The beneficial effects of the utility model include:

[0016] 1. The operator or a robot places the cylinder part upside down on the cylinder's inner support mechanism. The inner and outer circular wire brushes are driven to remove rust and film from the inner and outer walls of the cylinder workpiece, respectively, so that the cylinder workpiece can automatically remove the film and rust, reducing the cost of labor input.

[0017] 2. The design of the device takes into account the adaptability of steel cylinders of different specifications. By adjusting the holder mechanism and the rotating wheel mechanism, it can adapt to steel cylinders of different sizes and has good versatility.

[0018] In addition, additional aspects and advantages of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a first-angle overall schematic diagram of the automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the utility model.

[0020] Figure 2 The utility model is a schematic overall cross-sectional view of an automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the present utility model.

[0021] Figure 3 It is a second angle overall schematic diagram of the automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the utility model.

[0022] Figure 4 This is a first angle detailed schematic diagram of the automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the utility model.

[0023] Figure 5 This is a detailed schematic diagram from a second angle of the automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the present utility model.

[0024] Figure 6 It is a detailed schematic diagram from a third angle of the automatic film and rust removal device for liquefied petroleum gas cylinders according to an embodiment of the present utility model.

[0025] Figure 7 It is a detailed schematic diagram of the cylinder workpiece. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0027] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," "right," "top," and "bottom" used in this utility model are merely relative to the relative positions of the components of the utility model in the accompanying drawings.

[0028] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0029] It should be understood that although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element without departing from the scope of the present disclosure.

[0030] Reference Figures 1 to 7 As shown, in some embodiments, the present invention discloses an automatic film and rust removal device for a liquefied petroleum gas cylinder, comprising:

[0031] Reference Figures 1 to 3 The frame 100 shown in the figure is provided with a cylinder inner opening mechanism 200 on the frame 100. The cylinder inner opening mechanism 200 comprises a first rotating shaft 210 vertically connected to the frame 100 and a clamping seat 220 drivingly connected to the first rotating shaft 210. Figures 1 to 6 As shown, the lower end of the first rotating shaft 210 is perpendicular to the surface of the frame 100, and the top of the first rotating shaft 210 is connected to the holder 220. The holder 220 is rotated and connected under the drive of the first rotating shaft 210. The holder 220 is used to place the cylinder workpiece 1000. Figure 3 Combine Figure 7 As shown, the cylinder workpiece is in the shape of an open end, which is inverted on the holder 220. The holder and the cylinder workpiece 1000 match each other in shape, and the holder drives the cylinder workpiece to rotate.

[0032] Continue to refer to Figures 1 to 6As shown, an internal rust-removing circular wire brush mechanism 300 is arranged opposite to the internal expansion mechanism 200 of the cylinder. The internal rust-removing circular wire brush mechanism 300 includes a second rotating shaft 310 and an internal rust-removing circular wire brush 320 that is transmission-connected to the second rotating shaft 310. The top end of the second rotating shaft 310 is connected to the top end of the internal rust-removing circular wire brush 320 and drives it to rotate. The internal rust-removing circular wire brush 320 is used to frictionally contact the inner wall of the cylinder workpiece. When the internal rust-removing circular wire brush 320 contacts the inner wall of the cylinder workpiece and rotates, the contact friction removes the coating and rust on the inner wall of the workpiece.

[0033] Continue to refer to Figures 1 to 6 As shown, an external rust removal circular wire brush mechanism 400 is provided corresponding to the internal rust removal circular wire brush mechanism 300. The external rust removal circular wire brush mechanism 400 includes a third rotating shaft 410, an external rust removal circular wire brush 420 drivingly connected to the third rotating shaft 410, and a film removal wire 430 rotatably connected to the third rotating shaft 410. The upper middle portion of the third rotating shaft 410 is connected to the top end of the third rotating shaft 410 and drives it to rotate. The external rust removal circular wire brush 420 is used to frictionally contact the outer wall of the cylinder workpiece. When the external rust removal circular wire brush 420 contacts the outer wall of the cylinder workpiece and rotates, it drives the outer wall to rotate. The film removal wire 430 is used to contact the outer wall of the cylinder workpiece to remove film and rust. The top end of the third rotating shaft 410 is connected to the film removal wire 430 and drives it to rotate. The end of the film removal wire 430 contacts and rotates with the outer wall of the cylinder workpiece to remove film and rust.

[0034] Continue to refer to Figures 1 to 6 As shown, the second rotating shaft 310 is in transmission connection with the second transmission member 330, the third rotating shaft 410 is in transmission connection with the third transmission member 440, the second transmission member 330 and the third transmission member 440 are respectively in transmission connection with the fourth transmission assembly 500, and the power input end of the fourth transmission assembly 500 is in transmission connection with the drive motor 110. The second transmission member 330 and the third transmission member 440 in the drawings are transmission components using gears, but of course other transmission components such as belts can also be used to transmission connect with the drive motor 110, and the drive motor 110 provides the rotational power.

[0035] The operator or a robot arm places the cylinder component upside down on the cylinder expansion mechanism, and the internal rust removal circular wire brush 320 is driven in combination with the external rust removal circular wire brush 420 to remove rust and film from the inner and outer walls of the cylinder workpiece, so that the cylinder workpiece can realize the process of automatically removing the coating and rust, reducing the cost of labor input.

[0036] Continue to refer to Figures 1 to 6The horizontal drive mechanism 600 shown is connected to the external rust removal circular wire brush mechanism 400 via a third mounting plate 630, allowing the horizontal drive mechanism 600 to drive the external rust removal circular wire brush mechanism 400 away from or toward the outer wall of the cylinder workpiece. The cylinder workpiece is placed on a holder, allowing an operator or robot to move the external rust removal circular wire brush mechanism 400 away from the internal rust removal circular wire brush mechanism 300, place the cylinder workpiece on the holder, and then the horizontal drive mechanism 600 drives the external rust removal circular wire brush mechanism 400 toward the outer wall of the cylinder workpiece, contacting and driving it to rotate.

[0037] Continuing with the figures, the horizontal drive mechanism 600 includes a first cylinder 610 mounted on the frame 100 and a first drive rod 620 connected to the push rod of the first cylinder 610. The end of the first drive rod 620 is movably connected to the third mounting plate 630 via a first movable bolt. The third mounting plate 630 is sleeved onto the third rotating shaft 410 and the fourth transmission assembly 500. Because the third rotating shaft 410 is not connected to the frame but is only connected between transmission components, the first cylinder 610 can drive the first drive rod 620 and the third mounting plate 630, pulling the third rotating shaft 410 to move the external rust removal circular wire brush mechanism 400 away from or closer to the outer wall of the cylinder workpiece.

[0038] Continue to refer to Figures 4 to 6 As shown, the horizontal drive mechanism 600 includes a second drive rod 640 connected to the push rod of the first cylinder 610. The end of the second drive rod 640 is movably connected to the second mounting plate 650 via a second movable bolt. The second mounting plate 650 is sleeved onto the second rotating shaft 310 and the fourth transmission assembly 500. Because the second rotating shaft 310 is not connected to the frame but only connects between transmission components, the first cylinder 610 drives the second drive rod 640, thereby driving the top end of the internal rust removal circular wire brush 320 to connect and drive its rotation. This can also move the internal rust removal circular wire brush 320, in conjunction with the external rust removal circular wire brush mechanism 400, away from or close to the outer wall of the cylinder workpiece.

[0039] Continue to refer to Figures 4 to 6 As shown, the third mounting plate 630 and the second mounting plate 650 are connected by a plurality of first elastic members 660. When the push rod of the first cylinder extends and stretches the two drive rods, the first elastic members 660 are squeezed. When the first cylinder releases the force, the extension of the first elastic members 660 is overcome and the drive rods 640 are reset, thereby increasing the degree of automation of the entire device.

[0040] Continue to refer to Figures 4 to 6The reducer 120 shown is connected to the motor shaft of the drive motor 110 through a transmission connection with the power input of the reducer 120. The power output of the reducer 120 is connected through a transmission connection with the first rotating shaft 210. The motor shaft of the drive motor 110 is also connected to the power input of the fourth transmission assembly 500 through a bevel gear assembly 111. This device enables a single drive motor to power more than three components. The connected reducer effectively increases the torque of the first rotating shaft, allowing the chuck to more effectively drive the heavier cylinder workpiece.

[0041] Continue to refer to Figure 2 Combine Figure 5 As shown, the cylinder expansion mechanism 200 includes a clamping block 230, a second elastic member 240 and a push block 250. The middle part of the clamping seat is provided with a first installation cavity running up and down and a plurality of pairs of second installation cavities running circumferentially and connected to the first installation cavity. The push block 250 is arranged in the first installation cavity, and the connecting part of the push block 250 is arranged in the second installation cavity. The second elastic member 240 is arranged between the connecting part of the push block 250 and the inner wall of the second installation cavity. When the push block 250 is at the bottom of the first installation cavity, it contacts and limits the end of the connecting part of the push block 250. The push block 250 is connected to the second cylinder 260 through a push rod to allow the push rod to push the push block 250 to move up and down in the first installation cavity. The connecting part of the push block 250 contacts or separates from the push block 250, and the second cylinder 260 is installed at the bottom of the frame 100. The push rod in the cross-sectional view is sleeved inside the first rotating shaft. The two are independent power transmission components. The second cylinder 260 links the push rod and push block 250. In the initial state, the push block 250 is at the bottom of the first mounting cavity, contacting the end of the connecting portion of the push block 250 to limit the position. The push block 250 is in the extended state. At this time, the outer edge shape of the clamping block 230 matches the inner wall shape of the cylinder to support the cylinder workpiece. Preferably, the outer edge of the clamping block 230 is provided with a wear-resistant member. The expansion and retraction of the clamping block can expand and tighten the cylinder workpiece or contract and loosen it, and its power comes from the second cylinder 260. The cylinder workpiece is driven to rotate by the clamping seat to remove rust and coating. The second cylinder 260 extends, causing the push block 250 to be lifted in the first installation cavity and separated from the end of the connection part of the push block 250, overcoming the elastic force of the second elastic member 240 set between the connection part of the push block 250 and the inner wall of the second installation cavity to retract. The push block 250 no longer supports the inner wall of the cylinder, and the operator or machine can remove the cylinder workpiece.

[0042] In some embodiments, the internal rust removal circular wire brush 320 and the external rust removal circular wire brush 420 are circular wire brushes, and the internal rust removal circular wire brush 320 and the external rust removal circular wire brush 420 are respectively installed on the second rotating shaft 310 and the third rotating shaft 410. The circular rotating wire brushes can effectively remove the coating and rust on the cylinder assembly.

[0043] In order to protect the production safety of operators and surrounding personnel, refer to Figure 3 As shown,

[0044] A protective cover 700 is mounted on the frame 100. One end of the protective cover 700 is hinged to the frame 100 to allow the protective cover 700 to be flipped on the frame 100 for easy maintenance. The protective cover 700 is provided with multiple air blow pipes 800 for blowing off the film on the cylinder workpiece, effectively removing the film on the workpiece.

[0045] Specifically, the automatic film and rust removal device for liquefied petroleum gas cylinders uses a second cylinder 260 at the bottom of the cylinder's expansion mechanism 200 to pull down and drive a connected push rod. The push rod drives a push block 250, which squeezes the clamping block 230 to expand in all directions. The multiple clamping blocks 230 installed on it clamp the cylinder workpiece. The drive motor 110 is activated and drives the reducer 120 via the input shaft. The reducer 120 drives the first rotating shaft 210 to rotate, while the cylinder workpiece rotates at a low speed. Simultaneously, the second transmission member 300 and the third transmission member 440 of the gear structure on the input shaft of the drive motor 110 transmit power to the second rotating shaft 310 and the third rotating shaft 410, driving the internal rust removal circular wire brush 320 and the external rust removal circular wire brush 420 installed on it. The first cylinder 610 retracts, and through the connecting rod and spring assembly, the inner and outer circular wire brushes approach each other and clamp the cylinder workpiece wall. The high-speed rotating inner and outer circular wire brushes rub against the slow-speed rotating cylinder workpiece, completing the cleaning and rust removal of the inner and outer walls of the cylinder workpiece. Simultaneously, the film blowing pipe 800 intermittently blows air to remove the remaining film on the cylinder workpiece. The wire brushes and film blowing pipe 800 cooperate to achieve better film and rust removal. After the film and rust removal is completed, the clean cylinder workpiece is picked up by the robot arm and placed in the next process.

[0046] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the aforementioned embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may be modified and varied in various ways.

Claims

1. An automatic film and rust removal device for liquefied petroleum gas cylinders, characterized in that: include: Rack (100), A steel cylinder inner expansion mechanism (200) is provided on the frame (100), the steel cylinder inner expansion mechanism (200) comprising a first rotating shaft (210) vertically rotatably connected to the frame (100) and a clamping seat (220) drivingly connected to the first rotating shaft (210), the clamping seat (220) being used to place the steel cylinder workpiece, An internal rust removal circular wire brush mechanism (300) is arranged opposite to the cylinder internal expansion mechanism (200), and the internal rust removal circular wire brush mechanism (300) comprises a second rotating shaft (310) and an internal rust removal circular wire brush (320) transmission-connected to the second rotating shaft (310), and the internal rust removal circular wire brush (320) is used for frictionally contacting the inner wall of the cylinder workpiece. An external rust removal circular wire brush mechanism (400) is provided corresponding to the internal rust removal circular wire brush mechanism (300), the external rust removal circular wire brush mechanism (400) comprising a third rotating shaft (410), an external rust removal circular wire brush (420) transmission-connected to the third rotating shaft (410), and a film removal wire (430) rotationally connected to the third rotating shaft (410), the external rust removal circular wire brush (420) being used for frictionally contacting the outer wall of the cylinder workpiece, and the film removal wire (430) being used for contacting the outer wall of the cylinder workpiece to remove film and rust. The second rotating shaft (310) is in transmission connection with the second transmission member (330), the third rotating shaft (410) is in transmission connection with the third transmission member (440), the second transmission member (330) and the third transmission member (440) are respectively in transmission connection with the fourth transmission assembly (500), and the power input end of the fourth transmission assembly (500) is in transmission connection with the drive motor (110).

2. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 1 is characterized in that: Also includes: A horizontal driving mechanism (600) is connected to the external rust removal circular wire brush mechanism (400) through a third mounting plate (630) to allow the horizontal driving mechanism (600) to drive the external rust removal circular wire brush mechanism (400) away from or close to the outer wall of the cylinder workpiece.

3. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 2 is characterized in that: The horizontal driving mechanism (600) includes a first cylinder (610) arranged on the frame (100) and a first driving rod (620) connected to the push rod of the first cylinder (610), the end of the first driving rod (620) is movably connected to the third mounting plate (630) through a first movable bolt, and the third mounting plate (630) is sleeved on the third rotating shaft (410) and the fourth transmission assembly (500).

4. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 3 is characterized in that: The horizontal drive mechanism (600) includes a second drive rod (640) connected to the push rod of the first cylinder (610), the end of the second drive rod (640) is movably connected to the second mounting plate (650) via a second movable bolt, and the second mounting plate (650) is sleeved on the second rotating shaft (310) and the fourth transmission assembly (500). The third mounting plate (630) and the second mounting plate (650) are connected via a plurality of first elastic members (660).

5. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 1 is characterized in that: Also includes: Reducer (120), The motor shaft of the driving motor (110) is in transmission connection with the power input end of the reducer (120), and the power output end of the reducer (120) is in transmission connection with the first rotating shaft (210). The motor shaft of the driving motor (110) is also connected to the power input end of the fourth transmission assembly (500) via a bevel gear assembly (111).

6. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 1 is characterized in that: The cylinder expansion mechanism (200) includes a clamping block (230), a second elastic member (240) and a push block (250). A first mounting cavity running in an up-down direction and a plurality of second mounting cavities communicating with the first mounting cavity in a circumferential direction are provided in the middle of the clamping block. The push block (250) is arranged in the first mounting cavity. The connecting portion of the push block (250) is arranged in the second mounting cavity. The second elastic member (240) is arranged between the connecting portion of the push block (250) and the inner wall of the second mounting cavity. When the push block (250) is at the bottom of the first mounting cavity, it contacts and limits the end of the connecting portion of the push block (250). The push block (250) is connected to the second cylinder (260) through a push rod to allow the push rod to push the push block (250) to move up and down in the first mounting cavity. The connecting portion of the push block (250) contacts or separates from the push block (250). The second cylinder (260) is installed at the bottom of the frame (100).

7. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 6 is characterized in that: The shape of the outer edge of the clamping block (230) matches the shape of the inner wall of the cylinder, and a wear-resistant part is provided on the outer edge of the clamping block (230).

8. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 1 is characterized in that: The inner rust removal circular wire brush (320) and the outer rust removal circular wire brush (420) are circular wire brushes, and the inner rust removal circular wire brush (320) and the outer rust removal circular wire brush (420) are respectively mounted on the second rotating shaft (310) and the third rotating shaft (410).

9. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 1 is characterized in that: A protective cover (700) is installed on the frame (100), and one end of the protective cover (700) is hingedly connected to the frame (100) to allow the protective cover (700) to flip on the frame (100).

10. The automatic film and rust removal device for liquefied petroleum gas cylinders according to claim 9, characterized in that: The protective cover (700) is provided with a plurality of blowing pipes (800) for blowing off the thin film on the cylinder workpiece.

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