A device for removing publicity stickers from urban public facilities

Abstract

The present invention provides a device for removing propaganda stickers from urban public facilities, which relates to the technical field of urban maintenance. The device comprises a vacuum sandblasting device and a removing frame. The removing frame is located on the side wall of the vacuum sandblasting device. Side grooves are symmetrically provided on the side wall of the removing frame. Limiting grooves are provided on the inner walls of the two side grooves. Multifunctional structures are slidably installed inside the two limiting grooves. The multifunctional structures comprise limiting blocks. Connecting rods are fixedly installed on the lower ends of the two limiting blocks. The two connecting rods are slidably installed with the side grooves. The two limiting blocks and the two connecting rods are partially exposed at the end of the side groove away from the limiting groove. Side plates are symmetrically fixedly installed on the side walls of the two connecting rods. By optimizing the structure and layout of the device and arranging the multifunctional structure, the device can provide the staff with auxiliary fixed-range spraying, fixed-range automatic spraying and improve the reliability of the overall sandblasting process without increasing the volume too much.

Description

Technical Field

[0001] The invention belongs to the technical field of urban maintenance, and more specifically, particularly relates to a device for removing propaganda stickers of urban public facilities. Background Art

[0002] At present, cities usually use promotional stickers to promote public facilities. However, since promotional stickers are usually glued to the wall, when removing the promotional stickers, vacuum sandblasting technology is generally used to remove the promotional stickers. This equipment does not require pressure, water or chemicals. It cleans the wall through a nozzle and special sand powder abrasives to restore its original color, which not only reduces costs, but also can easily remove graffiti and stickers on the surface of objects such as tiles, plastics, concrete, and stone. The most important thing is that this technology does not harm the surface structure of the wall.

[0003] 1. At present, the length of promotional stickers usually has a variety of sizes, but the frame used for sandblasting in existing equipment is usually fixed in size. Therefore, when workers use the equipment to remove promotional stickers that are larger than the sandblasting frame, they usually need to clean them several times before they can be cleaned, which leads to low cleaning efficiency;

[0004] 2. When removing promotional stickers, the existing equipment usually requires the staff to hold the pipe of the sandblasting head to control the sandblasting range of the sandblasting head to complete the removal of the promotional stickers. The function of automatically sandblasting to remove the promotional stickers cannot be realized, which easily increases the labor intensity of the staff;

[0005] 3. When removing promotional stickers, the existing equipment often only has the effect of removing promotional stickers, lacks the adjustment of the sandblasting frame and automated sandblasting, has less auxiliary effects and functionality, and cannot further improve the convenience and applicability of use. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a device for removing publicity stickers of urban public facilities to solve the above problems.

[0007] A device for removing publicity stickers for urban public facilities, comprising a vacuum sandblasting device and a removal frame, wherein the removal frame is located on the side wall of the vacuum sandblasting device, and side grooves are symmetrically opened on the side wall of the removal frame, and both inner walls of the two side grooves are provided with limit grooves, and both the two side grooves and the limit grooves are sprayed with magnetic coatings;

[0008] A multifunctional structure is slidably installed inside the two limit grooves;

[0009] The multifunctional structure includes a limit block, a connecting rod is fixedly installed at the lower end of each of the limit blocks, and the two connecting rods are slidably installed with the side grooves. The two limit blocks and the two connecting rods are partially exposed at the end of the side groove away from the limit groove. Side panels are symmetrically fixedly installed on the side walls of the two connecting rods, and the two side plates are slidably installed with the side grooves. The two limit blocks, the connecting rods and the side walls of the side panels are sprayed with a magnetic coating, and the magnetic coating on the two side grooves and the limit grooves is attracted to the magnetic coating between the limit blocks, the connecting rods and the side panels. A bottom plate is fixedly installed between the two connecting rods, the bottom plate is fixedly installed with the side plates, and a rear plate is fixedly installed on the upper end of the bottom plate.

[0010] Preferably, a rear plate is fixedly installed on the upper end of the base plate, and the rear plate is fixedly installed between the side plates. A recovery pipe is provided between the base plate and the vacuum sandblasting equipment. A handle is fixedly installed on the lower end of the base plate, and a U-shaped frame is fixedly installed on the lower end of the base plate, and the U-shaped frame is located on the outside of the recovery pipe and the handle, and the U-shaped frame is partially exposed outside the cleaning frame. A vertical rod is fixedly installed on the upper end of the U-shaped frame, a circular groove is opened inside the vertical rod, a limiting ring is provided inside the circular groove, and a pull rod is slidably installed inside the limiting ring.

[0011] Preferably, a spring is fixedly installed on the side wall of the limiting ring, a pin is fixedly installed on the side wall of the spring, the pin is fixedly installed on the pull rod, a first fitting is fixedly installed on the surface of the cleaning frame, a second fitting is fixedly installed between the two side plates and the bottom plate, a plurality of slots are provided on the surface of the cleaning frame away from the first fitting, each of the pins is engaged with the slot, sliding grooves are provided on the side walls of the two side grooves, the two sliding grooves are both located on the inner side of the limiting grooves, sliders are slidably installed inside the two sliding grooves, and a sandblasting head is fixedly installed between the two sliders.

[0012] Preferably, the two sliders and the sandblasting head are both located above the limit block and the side plate, a conveying pipe is provided between the feed port of the sandblasting head and the vacuum sandblasting equipment, an annular toothed sleeve is provided on the circumferential surface of the conveying pipe, the annular toothed sleeve is slidably installed with the cleaning frame, a vertical sleeve is fixedly installed on the upper end of the cleaning frame, the annular toothed sleeve is located on the inner side of the vertical sleeve, the vertical sleeve is "C" shaped, a motor is fixedly installed on the upper end of the cleaning frame, a gear is fixedly installed on the output shaft of the motor, and the gear is meshed and installed with the annular toothed sleeve through the notch of the vertical sleeve.

[0013] Preferably, a pressure block is fixedly installed at the lower end of the sandblasting head, a limit switch is embedded and installed inside the base plate, the probe of the limit switch is located above the base plate, a rectangular frame is fixedly installed at the upper end of the base plate, the rectangular frame is located on the outside of the limit switch, and protective plates are hinged on the inner sides of the rectangular frame through reset hinges, silicone pads are fixedly installed on the opposite ends between the two protective plates, the pressure block is parallel to the limit switch, and the pressure block is adapted to the limit switch.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, by providing the side grooves and the limit grooves, the staff can control the overall length between the cleaning frame and the bottom plate according to the size of the propaganda stickers to be removed to pull the vertical rod downward, so that the vertical rod generates a radial force to drive the U-shaped frame and the bottom plate to move downward, so that the limit block and the connecting rod slide with the limit groove, and the side plate slides with the side groove, so that the distance between the cleaning frame and the bottom plate is larger than the propaganda stickers to be removed, thereby facilitating the subsequent direct cleaning of the propaganda stickers in a single time, and improving the cleaning efficiency and applicability;

[0016] In the present invention, by pulling the pull rod downward, the pull rod generates a radial force to drive the bayonet to move toward one side of the limit ring. At the same time, the spring will be compressed, so that the bayonet will be separated from the inside of the slot. When the pressure of the pull rod is released, the spring will reset, and then drive the bayonet to be clamped into the inside of the slot again, so as to provide a secondary clamping fixation for the adjusted bottom plate, avoiding the problem that when the pressure block squeezes the limit switch in the subsequent period, the support force provided by the magnetic attraction coating is insufficient, resulting in the bottom plate moving downward as a whole, resulting in a reduction in the influence of the change in the cleaning range, thereby improving reliability;

[0017] In the present invention, by turning on the motor, the motor can drive the gear to rotate and mesh with the annular toothed sleeve, so that the annular toothed sleeve drives the conveying pipeline as a whole to convey to the inside of the vacuum sandblasting equipment, thereby generating a radial force on the sandblasting head to move downward to complete the automatic cleaning of the promotional stickers, avoiding the problem of repeated manual cleaning by the staff, improving efficiency and reducing labor intensity;

[0018] In the present invention, since the limit switch is located on the bottom plate, when adjusting the distance between the cleaning frame and the bottom plate, the bottom plate will synchronously drive the limit switch to move synchronously, so that when the staff adjusts the distance between the U-shaped frame and the bottom plate, the sandblasting range of the subsequent sandblasting head on the promotional sticker will be changed synchronously, thereby improving convenience;

[0019] In the present invention, by arranging the rectangular frame and the protective plate on the outside of the limit switch, a protective effect can be provided for the limit switch to prevent the abrasive blasted by the sandblasting head from rebounding after impacting the wall surface and causing damage to the limit switch. The reset hinge connects the protective plate to the rectangular frame, so that the pressure block can automatically reset after pressing the probe of the limit switch, thereby improving the protective performance.

[0020] In the present invention, by arranging a "C"-shaped vertical sleeve above the vacuum sandblasting equipment, the problem of difficult engagement caused by the annular tooth groove sleeve being made of soft material can be avoided, thereby improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional connection explosion structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the cleaning frame of the present invention;

[0024] Figure 4 The present invention Figure 3 A magnified view of the structure at A;

[0025] Figure 5 It is a schematic diagram of the explosion structure of the cleaning frame connection of the present invention;

[0026] Figure 6 is a cross-sectional view of a cleaning frame of the present invention;

[0027] Figure 7 It is a schematic diagram of the bottom plate connection explosion structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the explosion structure of the side plate connection of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the U-shaped frame of the present invention;

[0030] Fig.10 It is a schematic diagram of the cross-sectional structure of the vertical rod of the present invention;

[0031] Fig.11 is a cross-sectional view of the card slot of the present invention;

[0032] Fig.12 It is a cross-sectional view of a rectangular frame of the present invention.

[0033] In the figure, the corresponding relationship between the component names and the figure numbers is: 11, vacuum sandblasting equipment; 12, cleaning frame; 13, side groove; 14, limit groove; 15, limit block; 16, connecting rod; 17, side plate; 18, bottom plate; 19, back plate; 21, recovery pipe; 22, handle; 23, U-shaped frame; 24, vertical rod; 25, circular groove; 26, limit ring; 27, pull rod; 28, spring; 29, latch; 31, slot; 32, slide; 33, slider; 34, sandblasting head; 35, conveying pipe; 36, annular toothed sleeve; 37, vertical sleeve; 38, motor; 39, gear; 41, first fitting part; 42, second fitting part; 43, pressure block; 44, limit switch; 45, rectangular frame; 46, protective plate; 47, silicone pad. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] See also Figure 1 - Fig.12 The present invention provides a device for removing publicity stickers for urban public facilities, including a vacuum sandblasting device 11 and a removal frame 12. The removal frame 12 is located on the side wall of the vacuum sandblasting device 11. Side grooves 13 are symmetrically opened on the side wall of the removal frame 12. Limiting grooves 14 are opened on the inner walls of the two side grooves 13. The insides of the two side grooves 13 and the limiting grooves 14 are sprayed with magnetic coatings.

[0036] The two limiting grooves 14 are both slidably installed with a multifunctional structure;

[0037] The multifunctional structure includes a limit block 15, a connecting rod 16 is fixedly installed at the lower end of the two limit blocks 15, and the two connecting rods 16 are slidably installed with the side groove 13. The two limit blocks 15 and the two connecting rods 16 are partially exposed at the end of the side groove 13 away from the limit groove 14. The side walls of the two connecting rods 16 are symmetrically fixed with side plates 17, and the two side plates 17 are slidably installed with the side groove 13. The two limit blocks 15, the connecting rods 16 and the side walls of the side plates 17 are sprayed with a magnetic coating, and the magnetic coating on the two side grooves 13 and the limit groove 14 and the magnetic attraction between the limit blocks 15, the connecting rods 16 and the side plates 17 The coatings are attracted to each other, and the cleaning frame 12 is picked up as a whole through the handle 22, and the distance between the cleaning frame 12 and the bottom plate 18 is matched with the wall surface where the promotional stickers need to be removed. Then the staff can turn on the vacuum sandblasting equipment 11, so that the vacuum sandblasting equipment 11 provides the required abrasive for sandblasting to the sandblasting head 34 through the conveying pipe 35, and then the sandblasting head 34 sandblasts and removes the promotional stickers. By setting a magnetic coating, the staff can provide auxiliary attraction when moving the limit block 15, the connecting rod 16 and the side plate 17, thereby improving the convenience of adjusting the cleaning frame 12 and the bottom plate 18.

[0038] A bottom plate 18 is fixedly installed between the two connecting rods 16, and the bottom plate 18 is fixedly installed with the side plate 17. A rear plate 19 is fixedly installed on the upper end of the bottom plate 18, and the rear plate 19 is fixedly installed on the upper end of the bottom plate 18. The rear plate 19 is fixedly installed between the side plates 17. A recovery pipe 21 is provided between the bottom plate 18 and the vacuum sandblasting equipment 11, and a handle 22 is fixedly installed on the lower end of the bottom plate 18. By setting the side grooves 13 and the limiting grooves 14, the staff can control the overall length between the cleaning frame 12 and the bottom plate 18 according to the size of the propaganda stickers to be removed to pull the vertical rod 24 downward, so that the vertical rod 24 generates a radial force to drive the U-shaped frame 23 and the bottom plate 18 to move downward, so that the limiting block 15 and the connecting rod 16 slide with the limiting groove 14, and the side plate 17 will slide with the side grooves 13, so that the distance between the cleaning frame 12 and the bottom plate 18 is greater than the required cleaning propaganda stickers, thereby facilitating the subsequent direct cleaning of the propaganda stickers in a single time, and improving the cleaning efficiency and applicability.

[0039] A U-shaped frame 23 is fixedly installed at the lower end of the bottom plate 18. The U-shaped frame 23 is located on the outside of the recovery pipe 21 and the handle 22. The U-shaped frame 23 is partially exposed outside the cleaning frame 12. A vertical rod 24 is fixedly installed at the upper end of the U-shaped frame 23. A circular groove 25 is penetrated inside the vertical rod 24. A limiting ring 26 is provided inside the circular groove 25. A pull rod 27 is slidably installed inside the limiting ring 26. A spring 28 is fixedly installed on the side wall of the limiting ring 26. A bayonet 29 is fixedly installed on the side wall of the spring 28. The bayonet 29 is fixedly installed with the pull rod 27. A first fitting member 41 is fixedly installed on the surface of the cleaning frame 12. A second fitting member 42 is fixedly installed between the two side plates 17 and the bottom plate 18. The cleaning frame 12 is away from the first fitting member 41. A plurality of slots 31 are provided on the surface of one side, and each of the pins 29 is engaged with the slots 31. By pulling the pull rod 27 downward, the pull rod 27 generates a radial force to drive the pin 29 to move toward the side of the limit ring 26. At the same time, the spring 28 will be compressed, so that the pin 29 will be disengaged from the slot 31. When the pressure of the pull rod 27 is released, the spring 28 will be reset, thereby driving the pin 29 to be engaged with the slot 31 again, thereby providing a secondary fixation for the adjusted bottom plate 18, avoiding the problem that when the pressure block 43 squeezes the limit switch 44, the support force provided by the magnetic coating is insufficient, resulting in the overall downward movement of the bottom plate 18, resulting in a reduction in the impact of the change in the cleaning range, thereby improving reliability.

[0040] Slide grooves 32 are provided on the side walls of the two side grooves 13, and the two slide grooves 32 are both located on the inner side of the limiting groove 14. Slide blocks 33 are slidably installed inside the two slide grooves 32, and a sandblasting head 34 is fixedly installed between the two slide blocks 33. The two slide blocks 33 and the sandblasting head 34 are both located above the limiting block 15 and the side plate 17. The two slide blocks 33 and the sandblasting head 34 are both located above the limiting block 15 and the side plate 17. By setting the slide grooves 32, when the sandblasting head 34 moves downward, it will drive the slide block 33 to slide inside the slide groove 32, thereby providing limitation and increasing the stability of the sandblasting head 34 when working.

[0041] A conveying pipe 35 is provided between the feed port of the sandblasting head 34 and the vacuum sandblasting equipment 11. An annular toothed sleeve 36 is provided on the circumferential surface of the conveying pipe 35. The annular toothed sleeve 36 is slidably installed with the cleaning frame 12. A vertical sleeve 37 is fixedly installed on the upper end of the cleaning frame 12. The annular toothed sleeve 36 is located on the inner side of the vertical sleeve 37. The vertical sleeve 37 is "C" shaped. A motor 38 is fixedly installed on the upper end of the cleaning frame 12. A gear 39 is fixedly installed on the output shaft of the motor 38. The gear 39 is meshed and installed with the annular toothed sleeve 36 through the notch of the vertical sleeve 37. A "C"-shaped vertical sleeve 37 is set above 11 to avoid the problem of difficult engagement caused by the soft annular tooth groove sleeve 36, improve stability, and turn on the motor 38 so that the motor 38 can drive the gear 39 to rotate and engage with the annular tooth groove sleeve 36, so that the annular tooth groove sleeve 36 drives the conveying pipe 35 as a whole to convey to the inside of the vacuum sandblasting equipment 11, and then generate a radial force on the sandblasting head 34 to move downward to complete the automatic cleaning of the promotional stickers, avoid the problem of repeated manual cleaning by the staff, improve efficiency and reduce labor intensity.

[0042] A pressure block 43 is fixedly installed at the lower end of the sandblasting head 34, and a limit switch 44 is embedded in the bottom plate 18. The probe of the limit switch 44 is located above the bottom plate 18. Since the limit switch 44 is located on the bottom plate 18, when adjusting the distance between the cleaning frame 12 and the bottom plate 18, the bottom plate 18 will synchronously drive the limit switch 44 to move synchronously, so that when the staff adjusts the distance between the U-shaped frame 23 and the bottom plate 18, the sandblasting range of the subsequent sandblasting head 34 on the promotional stickers will be changed synchronously, thereby improving convenience.

[0043] A rectangular frame 45 is fixedly installed on the upper end of the base plate 18, and the rectangular frame 45 is located on the outside of the limit switch 44. Protective plates 46 are hinged on the inside of the rectangular frame 45 through reset hinges, and silicone pads 47 are fixedly installed on the opposite ends between the two protective plates 46. The pressure block 43 is parallel to the limit switch 44, and the pressure block 43 is adapted to the limit switch 44. By arranging the rectangular frame 45 and the protective plate 46 on the outside of the limit switch 44, a protective effect can be provided for the limit switch 44 to avoid damage to the limit switch 44 caused by the abrasive blasted by the sandblasting head 34 and rebounding after impacting the wall. The reset hinge connects the protective plate 46 to the rectangular frame 45, so that the pressure block 43 can automatically reset after pressing the probe of the limit switch 44, thereby improving the protective performance.

[0044] Working principle:

[0045] The first step is to control the distance between the cleaning frame 12 and the bottom plate 18 according to the length of the promotional sticker to be removed;

[0046] When in use, the staff can first load suitable sandblasting abrasive into the vacuum sandblasting equipment 11, and then the staff can move the equipment as a whole to the side of the promotional sticker to be removed, and then the staff can adjust the overall length between the removal frame 12 and the bottom plate 18 according to the length of the promotional sticker to be removed. At this time, the staff can pull the pull rod 27, so that the pull rod 27 generates a radial force to drive the latch 29 to move toward the side of the limit ring 26. At the same time, the spring 28 will be compressed, so that the latch 29 is out of the slot 31. Then the staff can pull the vertical rod 24 downward, so that the vertical rod 24 generates a radial force to drive the U-shaped frame 23 and the bottom plate 18 to move downward. The bottom plate 18 is connected to the limit block 15, the connecting rod 16, the side plate 17 and the rear plate 19. At this time, the limit block 15, the connecting rod 16, the side plate 17 and the rear plate 19 will move downward inside the cleaning frame 12, so the limit block 15 and the connecting rod 16 will slide with the limit groove 14, and the side plate 17 will slide with the side groove 13. At this time, the distance between the cleaning frame 12 and the bottom plate 18 will increase. When the distance between the bottom plate 18 and the cleaning frame 12 is greater than the length of the promotional sticker to be removed, the staff can release the pressure on the pull rod 27, thereby resetting the spring 28 and driving the latch 29 to be inserted into the latch groove 31 again, thereby completing the adjustment of the distance between the cleaning frame 12 and the bottom plate 18.

[0047] The second step is to clean the promotional stickers;

[0048] Then the staff can pick up the cleaning frame 12 as a whole through the handle 22, and fit the distance between the cleaning frame 12 and the bottom plate 18 to the wall surface where the promotional stickers need to be removed. At this time, the first fitting member 41 on the cleaning frame 12 and the second fitting member 42 between the side plate 17 and the bottom plate 18 will fit with the wall surface to form a relatively sealed space. Then the staff can turn on the vacuum sandblasting equipment 11 and the motor 38, so that the vacuum sandblasting equipment 11 provides the sandblasting head 34 with the required abrasive for sandblasting through the conveying pipe 35, so that the sandblasting head 34 can sandblast and remove the promotional stickers. When the motor 38 is turned on, the output shaft of the motor 38 will drive the gear 39 to rotate and mesh with the annular tooth groove sleeve 36, so that the annular tooth groove sleeve 36 drives the conveying pipe 35 as a whole to convey to the inside of the vacuum sandblasting equipment 11. At the same time, the sandblasting head 34 will drive the slider 33 and the slide groove 32 to slide, so that the sandblasting head 34 sandblasts the promotional stickers from top to bottom, and then the promotional stickers on the wall can be removed. At the same time, the abrasives, paper scraps and other impurities removed and after sandblasting will be recovered into the vacuum sandblasting equipment 11 through the recovery pipe 21.

[0049] The third step is to complete the fixed-range reset effect during the cleaning process;

[0050] Since the limit switch 44 is located on the bottom plate 18, when adjusting the distance between the cleaning frame 12 and the bottom plate 18, the bottom plate 18 will synchronously drive the limit switch 44 to move synchronously, and the sandblasting head 34 will drive the slider 33 to move downward. As the sandblasting head 34 descends, the pressing block 43 will press downward, so that the protective plate 46 rotates downward at the same time through the reset hinge (the reset hinge is usually equipped with a mechanical structure such as a torsion spring, which can store and release energy to ensure that it can reset after the external pressure disappears), so that the pressing block 43 can press the probe of the limit switch 44. At this time, the motor 3 8 will reset in the forward direction and drive the gear 39 to mesh with the annular tooth groove sleeve 36 (the annular tooth groove sleeve 36 is the prior art, made of rubber, and has a plurality of annular grooves that can mesh with the gear 39 for transmission with the gear 39) again, so that the sandblasting head 34 is reset to the initial position. At the same time, the protective plate 46 and the silicone pad 47 will reset again, so as to play a wrapping and protective role for the limit switch 44 and the probe of the limit switch 44 (the travel switch 44 is also called the limit switch or position switch, which is used to control the travel range of the mechanical parts to ensure that the equipment stops, starts or changes the movement direction at the specified position).

[0051] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A device for removing publicity stickers from urban public facilities, comprising a vacuum sandblasting device (11) and a removal frame (12), wherein the removal frame (12) is located on a side wall of the vacuum sandblasting device (11), and is characterized in that: The side walls of the cleaning frame (12) are symmetrically provided with side grooves (13), and the inner walls of the two side grooves (13) are both provided with limiting grooves (14); A multifunctional structure is slidably mounted inside the two limiting grooves (14); The multifunctional structure comprises a limit block (15), the lower ends of the two limit blocks (15) are fixedly mounted with a connecting rod (16), the two connecting rods (16) are slidably mounted with the side groove (13), the two limit blocks (15) and the two connecting rods (16) are partially exposed at the end of the side groove (13) away from the limit groove (14), the side walls of the two connecting rods (16) are symmetrically fixedly mounted with a side plate (17), the two side plates (17) are slidably mounted with the side groove (13), a bottom plate (18) is fixedly mounted between the two connecting rods (16), the bottom plate (18) is fixedly mounted with the side plate (17), and a rear plate (19) is fixedly mounted on the upper end of the bottom plate (18); A rear plate (19) is fixedly mounted on the upper end of the bottom plate (18); the rear plate (19) is fixedly mounted between the side plates (17); and a recovery pipe (21) is provided between the bottom plate (18) and the vacuum sandblasting equipment (11); A first fitting member (41) is fixedly mounted on the surface of the cleaning frame (12), and a second fitting member (42) is fixedly mounted between the two side panels (17) and the bottom panel (18); A slide groove (32) is provided on the side walls of the two side grooves (13), the two slide grooves (32) are located on the inner side of the limiting groove (14), a slider (33) is slidably installed inside the two slide grooves (32), and a sandblasting head (34) is fixedly installed between the two sliders (33); A pressing block (43) is fixedly mounted on the lower end of the sandblasting head (34); A limit switch (44) is embedded and installed inside the bottom plate (18); The probe of the limit switch (44) is located above the bottom plate (18), a rectangular frame (45) is fixedly mounted on the upper end of the bottom plate (18), and protective plates (46) are hingedly connected to the inner sides of the rectangular frame (45) via reset hinges; A silicone pad (47) is fixedly mounted on the opposite ends between the two protection plates (46), the pressing block (43) is parallel to the limit switch (44), and the pressing block (43) is adapted to the limit switch (44); A handle (22) is fixedly mounted on the lower end of the bottom plate (18), and a U-shaped frame (23) is fixedly mounted on the lower end of the bottom plate (18); A vertical rod (24) is fixedly mounted on the upper end of the U-shaped frame (23); a circular groove (25) is formed inside the vertical rod (24); a limiting ring (26) is provided inside the circular groove (25); a pull rod (27) is slidably mounted inside the limiting ring (26); A spring (28) is fixedly mounted on the side wall of the limiting ring (26), a latch (29) is fixedly mounted on the side wall of the spring (28), and the latch (29) is fixedly mounted on the pull rod (27).

2. The urban public facility propaganda sticker removal device as claimed in claim 1, characterized in that: A plurality of slots (31) are formed on the surface of the cleaning frame (12) at a side away from the first fitting member (41), and each of the latch pins (29) is latched in a slot (31).

3. The urban public facility propaganda sticker removal device as claimed in claim 1, characterized in that: A delivery pipe (35) is provided between the feed port of the sandblasting head (34) and the vacuum sandblasting equipment (11), and an annular tooth groove sleeve (36) is provided on the circumferential surface of the delivery pipe (35).

4. The urban public facility propaganda sticker removal device as claimed in claim 3, characterized in that: The annular toothed sleeve (36) is slidably mounted on the cleaning frame (12); a vertical sleeve (37) is fixedly mounted on the upper end of the cleaning frame (12); the annular toothed sleeve (36) is located on the inner side of the vertical sleeve (37); the vertical sleeve (37) is "C" shaped; a motor (38) is fixedly mounted on the upper end of the cleaning frame (12).

5. The urban public facility propaganda sticker removal device as claimed in claim 4, characterized in that: A gear (39) is fixedly mounted on the output shaft of the motor (38), and the gear (39) is meshed with the annular toothed sleeve (36) through the notch of the vertical sleeve (37).

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