Automated cleaning lift system

Abstract

The application is an automatic cleaning lifting system, comprising a base, a plurality of outwardly extending support assemblies are hingedly arranged on the periphery of the base, the base is hollow and has an upper opening, a telescopic mechanism is sleeved in the base, a plurality of layered sleeves are sleeved on the telescopic mechanism, the sleeves are stacked from outside to inside one by one in the base, and the top end of the innermost sleeve is provided with a fixed platform for fixing a high-pressure spray head or a directional multi-dimensional automatic cleaning system; the free end of the top end telescopic rod of the telescopic mechanism is fixed to the bottom surface of the fixed platform. The automatic cleaning lifting system has the following advantages: the application can be put in even if the inlet of the kettle is small, and then unfolded; the cleaning efficiency is higher; it is more convenient to carry and use; it is suitable for cleaning kettles with different heights and widths; it is more stable, and the cleaning is cleaner and more thorough.

Description

Technical Field

[0001] This invention relates to the field of tank cleaning technology, and more particularly to an automated cleaning and lifting system. Background Technology

[0002] After a period of use, various residues will adhere to the inner wall of the vessel. If these residues accumulate to a certain extent and are not cleaned in time, they will affect the normal use of the vessel and the quality of the product. At present, most of the cleaning of various vessels is done manually. Since the only connection between the vessel and the outside world is a small manhole, and the internal structure of the vessel is complex, with various components such as feed pipes, instrument pipes, and stirring shafts, it is not only limited by space to clean all the surfaces inside the vessel, but also very difficult, time-consuming and labor-intensive to clean the vessel. Furthermore, due to the toxicity of the substances inside the vessel, after the vessel is emptied, it is necessary to purge and wait for the air inside the vessel to reach the conditions for re-entry, which can take tens of hours.

[0003] Chinese invention patent application number 202022337238.7 describes a closed-loop automatic cleaning system for containers. Its features include: an isolation valve installed at the cleaning port of a reaction vessel; a cleaning mechanism storage box mounted on the isolation valve; and a cleaning unit mounted on the cleaning mechanism storage box. The cleaning unit includes a telescopic motor, a lifting rod, an upper limit switch, a lower limit switch, a three-dimensional nozzle, and a water supply unit for providing high-pressure cleaning fluid. The telescopic motor drives the lifting rod to move vertically, and the output end of the lifting rod passes through the cleaning mechanism storage box and the isolation valve before entering the reaction vessel. A three-dimensional nozzle connected to the water supply unit is installed at the end of the lifting rod. The cleaning mechanism storage box is provided with a nozzle sealing guide cavity. This invention is highly practical and easy to promote. However, it suffers from several problems: the entire system does not extend into the vessel during cleaning, resulting in cleaning dead zones, incomplete cleaning, and low efficiency; it is not stable enough during cleaning, the lifting rod lacks support and is too thin and unstable, and the overall device is not compact or flexible enough; it cannot meet the cleaning needs of vessels of different sizes and heights, etc.

[0004] Therefore, an automated cleaning and lifting system was designed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides an automated cleaning and lifting system, including a base. Several outwardly extending support components are hinged to the outer periphery of the base. The base is hollow and open at the top. A telescopic mechanism is fitted inside the base. A multi-stage sleeve is stacked around the telescopic mechanism, with each stage of the sleeve stacked from the outside inwards within the base. A fixed platform is located at the top of the innermost sleeve. This fixed platform is used to fix a high-pressure nozzle or a directional multi-dimensional automated cleaning system. The free end of the telescopic rod at the top of the telescopic mechanism is fixed to the bottom surface of the fixed platform.

[0006] Preferably, the base is a hollow square tube with an open top, and the bottom of the base is a circular support plate. The base and the bottom circular support plate are fixed together by triangular reinforcing ribs.

[0007] Preferably, a plurality of auxiliary support rods are hinged to the bottom surface of the base bottom support plate, and the free ends of the auxiliary support rods are provided with end pads.

[0008] Preferably, the outward expansion support assembly includes a two-section telescopic rod, which is fixed between the two sections by a through-hole fixing pin. Pulling out the fixing pin can retract the telescopic rod, extend the telescopic rod, and fix it by inserting the fixing pin. The free end of the telescopic rod is provided with a foot pad.

[0009] Preferably, the base is fitted with a three-stage sleeve, the three-stage sleeve is fitted with a two-stage sleeve, the two-stage sleeve is fitted with a first-stage sleeve, and the fixing platform is disposed on the top surface of the first-stage sleeve.

[0010] Preferably, the upper part of the inner wall of the base is provided with an inner roller and an inner limiting plate, the inner limiting plate being located below the inner roller. The lower end of the outer wall of the three-stage sleeve is provided with a three-stage outer roller and a three-stage outer limiting plate, the outer limiting plate being located above the outer roller. The inner roller and the outer roller assist the three-stage sleeve in retracting into or extending out of the base. The outer limiting plate is located below the inner limiting plate, and the engagement of the outer limiting plate and the inner limiting plate prevents the three-stage sleeve from completely dislodging from the base.

[0011] The upper part of the inner wall of the third-stage sleeve is provided with a third-stage inner roller and a third-stage inner limiting plate, with the third-stage inner limiting plate located below the third-stage inner roller. The lower end of the outer wall of the second-stage sleeve is provided with a second-stage outer limiting plate and a second-stage outer roller, with the second-stage outer limiting plate located above the second-stage outer roller. The third-stage inner roller and the second-stage outer roller can assist the second-stage sleeve in retracting into or extending out of the third-stage sleeve. The second-stage outer limiting plate is located below the third-stage inner limiting plate, and the engagement of the second-stage outer limiting plate and the third-stage inner limiting plate prevents the second-stage sleeve from completely disengaging from the third-stage sleeve.

[0012] The upper part of the inner wall of the secondary sleeve is provided with a secondary inner roller and a secondary inner limiting plate, with the secondary inner limiting plate located below the secondary inner roller. The lower end of the outer wall of the primary sleeve is provided with a primary outer limiting plate and a primary outer roller, with the primary outer limiting plate located above the primary outer roller. The secondary inner roller and the primary outer roller can assist the primary sleeve in retracting into or extending out of the secondary sleeve. The primary outer limiting plate is located below the secondary inner limiting plate, and the engagement of the primary outer limiting plate and the secondary inner limiting plate prevents the primary sleeve from completely disengaging from the secondary sleeve.

[0013] Preferably, both the end pads and the foot pads are made of elastic material.

[0014] Preferably, the telescopic mechanism is one of a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder.

[0015] Preferably, each layer has four sets of inner rollers, one pair per set, for a total of four pairs; each layer has four sets of outer rollers, one pair per set, for a total of four pairs; each layer has four outer limiting plates; and each layer has four inner limiting plates.

[0016] The beneficial effects of this invention are:

[0017] The automated cleaning and lifting system described in this invention has the following advantages:

[0018] 1. Before use, the auxiliary support rod, the outward expansion support assembly, and the telescopic mechanism are all in a retracted state, and the multi-stage sleeve is stacked inside the base 1; even if the inlet of the vessel is small, it will not affect the insertion of this application, and it will be unfolded after insertion;

[0019] 2. Through the multi-stage sleeve stacking design, it can descend layer by layer to spray and clean from top to bottom, resulting in higher cleaning efficiency, no dead corners, and more thorough cleaning;

[0020] 3. The auxiliary support rod, the external expansion support assembly, and the telescopic mechanism reduce the size of this application when not in use, making it more convenient to carry and use;

[0021] 4. Suitable for cleaning tanks and vessels of different heights and widths;

[0022] 5. The auxiliary support rod and the extended support assembly make the support more stable during cleaning;

[0023] 6. The design with multiple sets of rollers, and the cooperation between the inner and outer rollers, makes the movement smoother;

[0024] 7. With the cooperation of inner and outer limit plates, it prevents the device from falling out during movement, making it safer and easier to use.

[0025] 8. It ensures cleaning quality and greatly improves cleaning efficiency, freeing workers from heavy physical labor. More importantly, the machine replaces people in reaching into the tank, reducing the safety hazards of tank entry operations. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is the front view of the present invention;

[0028] Figure 3 This is a top view of the present invention;

[0029] Figure 4 This is a perspective view of the present invention (after removing the primary sleeve, secondary sleeve, and tertiary sleeve);

[0030] Figure 5 This is a three-dimensional view of a three-stage sleeve;

[0031] Figure 6 This is a three-dimensional view of the secondary sleeve;

[0032] Figure 7 A three-dimensional view of the first-stage sleeve;

[0033] Figure 8 This is a diagram illustrating the implementation status of the present invention;

[0034] in:

[0035] 1-Base; 2-Auxiliary support rod; 3-End pad; 4-Foot pad; 5-Telescopic rod; 6-Fixing pin; 7-Third-stage roller; 8-Third-stage sleeve; 9-Third-stage inner roller; 10-Second-stage sleeve; 11-Second-stage inner roller; 12-First-stage sleeve; 13-Fixing plate; 14-Third-stage limiting plate; 15-Third-stage outer limiting plate; 16-Third-stage outer roller; 17-Third-stage inner limiting plate; 18-Second-stage outer limiting plate; 19-Second-stage outer roller; 20-Second-stage inner limiting plate; 21-First-stage outer limiting plate; 22-First-stage outer roller; 23-Telescopic mechanism. Detailed Implementation

[0036] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention.

[0037] like Figure 1-4As shown, the automated cleaning and lifting system includes a base 1. Several outwardly extending support components are hinged to the outer periphery of the base 1. The base 1 is hollow and open at the top. A telescopic mechanism 23 is fitted inside the base 1. The telescopic mechanism 23 is fitted with a series of stacked multi-stage sleeves. The multi-stage sleeves are stacked one after another from the outside to the inside of the base 1, and a fixed platform 13 is provided at the top of the innermost sleeve. The fixed platform 13 is used to fix the high-pressure nozzle or the directional multi-dimensional automated cleaning system. The free end of the telescopic rod at the top of the telescopic mechanism 23 is fixed to the bottom surface of the fixed platform 13.

[0038] Preferably, the base 1 is a hollow square tube with an open top, and the bottom of the base 1 is a circular support plate. The base 1 and the bottom circular support plate are fixed together by triangular reinforcing ribs.

[0039] Preferably, a plurality of auxiliary support rods 2 are hinged to the bottom surface of the bottom support plate of the base 1, and the free ends of the auxiliary support rods 2 are provided with end pads 3.

[0040] Preferred, such as Figure 4 As shown, the outward expansion support assembly includes a double-section telescopic rod 5. The two sections of the telescopic rod are fixed together by a fixing pin 6. Pulling out the fixing pin 6 can retract the telescopic rod and extend it. The telescopic rod is fixed by inserting the fixing pin 6. The free end of the telescopic rod 5 is provided with a foot pad 4.

[0041] Preferably, the base 1 is fitted with a three-stage sleeve 8, the three-stage sleeve 8 is fitted with a two-stage sleeve 10, the two-stage sleeve 10 is fitted with a first-stage sleeve 12, and the fixed platform 13 is disposed on the top surface of the first-stage sleeve 12.

[0042] Preferred, such as Figure 4 and Figure 5 As shown, the upper part of the inner wall of the base 1 is provided with an inner roller 7 and an inner limiting plate 14. The inner limiting plate 14 is located below the inner roller 7. The lower end of the outer wall of the three-stage sleeve 8 is provided with a three-stage outer roller 16 and a three-stage outer limiting plate 15. The three-stage outer limiting plate 15 is located above the three-stage outer roller 16. The inner roller 7 and the three-stage outer roller 16 can assist the three-stage sleeve 8 in retracting into the base 1 or extending out of the base 1. The three-stage outer limiting plate 15 is located below the inner limiting plate 14. The three-stage outer limiting plate 15 and the inner limiting plate 14 engage and limit the three-stage sleeve 8 to prevent it from completely dislodging from the base 1.

[0043] like Figure 5 and Figure 6As shown, the upper part of the inner wall of the third-stage sleeve 8 is provided with a third-stage inner roller 9 and a third-stage inner limiting plate 17, with the third-stage inner limiting plate 17 located below the third-stage inner roller 9. The lower end of the outer wall of the second-stage sleeve 10 is provided with a second-stage outer limiting plate 18 and a second-stage outer roller 19, with the second-stage outer limiting plate 18 located above the second-stage outer roller 19. The third-stage inner roller 9 and the second-stage outer roller 19 can assist the second-stage sleeve 10 in retracting into or extending out of the third-stage sleeve 8. The second-stage outer limiting plate 18 is located below the third-stage inner limiting plate 17, and the second-stage outer limiting plate 18 and the third-stage inner limiting plate 17 engage to limit and prevent the second-stage sleeve 10 from completely disengaging from the third-stage sleeve 8.

[0044] like Figure 6 and Figure 7 As shown, the upper part of the inner wall of the secondary sleeve 10 is provided with a secondary inner roller 11 and a secondary inner limiting plate 20, with the secondary inner limiting plate 20 located below the secondary inner roller 11. The lower end of the outer wall of the primary sleeve 12 is provided with a primary outer limiting plate 21 and a primary outer roller 22, with the primary outer limiting plate 21 located above the primary outer roller 22. The secondary inner roller 11 and the primary outer roller 22 can assist the primary sleeve 12 in retracting into or extending out of the secondary sleeve 10. The primary outer limiting plate 21 is located below the secondary inner limiting plate 20, and the primary outer limiting plate 21 and the secondary inner limiting plate 20 engage to prevent the primary sleeve 12 from completely disengaging from the secondary sleeve 10.

[0045] Preferably, both the end pad 3 and the foot pad 4 are made of elastic material.

[0046] Preferably, the telescopic mechanism 23 is one of a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder.

[0047] Preferably, each layer has four sets of inner rollers, one pair per set, for a total of four pairs; each layer has four sets of outer rollers, one pair per set, for a total of four pairs; each layer has four outer limiting plates; and each layer has four inner limiting plates.

[0048] Example

[0049] An automated cleaning and lifting system includes a base 1. Several outward expansion support components are hinged to the outer periphery of the base 1. Each outward expansion support component includes a double-section telescopic rod 5. The two sections of the telescopic rod are fixed together by a through-hole fixing pin 6. Pulling out the fixing pin 6 can retract the telescopic rod and extend the telescopic rod. The telescopic rod is fixed by inserting the fixing pin 6. A foot pad 4 is provided at the free end of the telescopic rod 5.

[0050] The base 1 is a hollow, open-top square tube. A telescopic mechanism 23, which is a hydraulic rod, is fitted inside the base 1. The telescopic mechanism 23 is fitted with a multi-stage sleeve with multiple layers stacked on top of each other. The multi-stage sleeve includes a tertiary sleeve 8, a secondary sleeve 10, and a primary sleeve 12. The tertiary sleeve 8 is fitted inside the base 1. The secondary sleeve 10 is fitted inside the tertiary sleeve 8. The primary sleeve 12 is fitted inside the secondary sleeve 10. The fixed platform 13 is located on the top surface of the primary sleeve 12.

[0051] The upper part of the inner wall of the base 1 is provided with an inner roller 7 and an inner limiting plate 14. The inner limiting plate 14 is located below the inner roller 7. The lower end of the outer wall of the three-stage sleeve 8 is provided with a three-stage outer roller 16 and a three-stage outer limiting plate 15. The three-stage outer limiting plate 15 is located above the three-stage outer roller 16. The inner roller 7 and the three-stage outer roller 16 can assist the three-stage sleeve 8 to retract into the base 1 or extend out of the base 1. The three-stage outer limiting plate 15 is located below the inner limiting plate 14. The three-stage outer limiting plate 15 and the inner limiting plate 14 engage and limit the three-stage sleeve 8 to prevent it from completely dislodging from the base 1.

[0052] The upper part of the inner wall of the third-stage sleeve 8 is provided with a third-stage inner roller 9 and a third-stage inner limiting plate 17, with the third-stage inner limiting plate 17 located below the third-stage inner roller 9. The lower end of the outer wall of the second-stage sleeve 10 is provided with a second-stage outer limiting plate 18 and a second-stage outer roller 19, with the second-stage outer limiting plate 18 located above the second-stage outer roller 19. The third-stage inner roller 9 and the second-stage outer roller 19 can assist the second-stage sleeve 10 in retracting into or extending out of the third-stage sleeve 8. The second-stage outer limiting plate 18 is located below the third-stage inner limiting plate 17, and the engagement of the second-stage outer limiting plate 18 and the third-stage inner limiting plate 17 prevents the second-stage sleeve 10 from completely disengaging from the third-stage sleeve 8.

[0053] The upper part of the inner wall of the secondary sleeve 10 is provided with a secondary inner roller 11 and a secondary inner limiting plate 20, with the secondary inner limiting plate 20 located below the secondary inner roller 11. The lower end of the outer wall of the primary sleeve 12 is provided with a primary outer limiting plate 21 and a primary outer roller 22, with the primary outer limiting plate 21 located above the primary outer roller 22. The secondary inner roller 11 and the primary outer roller 22 can assist the primary sleeve 12 in retracting into or extending out of the secondary sleeve 10. The primary outer limiting plate 21 is located below the secondary inner limiting plate 20, and the primary outer limiting plate 21 and the secondary inner limiting plate 20 engage to prevent the primary sleeve 12 from completely disengaging from the secondary sleeve 10.

[0054] The fixed platform 13 is used to fix the high-pressure nozzle or the directional multi-dimensional automated cleaning system; the free end of the top telescopic rod of the telescopic mechanism 23 is fixed to the bottom surface of the fixed platform 13;

[0055] The base 1 has a circular support plate at its bottom, and the base 1 and the bottom circular support plate are fixed together by a triangular reinforcing rib. Several auxiliary support rods 2 are hinged to the bottom surface of the bottom support plate of the base 1, and the free ends of the auxiliary support rods 2 are provided with end pads 3.

[0056] How to use:

[0057] like Figure 8 As shown, before use, the auxiliary support rod 2, the outward expansion support assembly, and the telescopic mechanism 23 are all in a retracted state, and the multi-stage sleeve is stacked inside the base 1; even if the inlet of the vessel is small, it will not affect the insertion of this application. After insertion, it can be unfolded, making it more convenient to carry and use.

[0058] When the tank needs to be cleaned, place this application in the tank, open the auxiliary support rod 2 and support it in the tank through the end pad 3, open the telescopic rod 5 and support it in the tank through the foot pad 4, and fix the telescopic rod 5 by inserting the fixing pin 6;

[0059] When the telescopic mechanism 23 is activated, it rises against the fixed platform 13, and the multi-stage sleeves unfold and extend sequentially. Taking the embodiment shown in the accompanying drawings as an example, the inner roller 7 of the base and the three-stage outer roller 16 can assist the three-stage sleeve 8 in retracting into the base 1 or extending out of the base 1; the three-stage outer limiting plate 15 and the inner limiting plate 14 of the base engage to limit and prevent the three-stage sleeve 8 from completely dislodging from the base 1;

[0060] The third-stage inner roller 9 and the second-stage outer roller 19 can assist the second-stage sleeve 10 in retracting into the third-stage sleeve 8 or extending out of the third-stage sleeve 8; the second-stage outer limiting plate 18 and the third-stage inner limiting plate 17 engage to limit the movement and prevent the second-stage sleeve 10 from completely dislodging from the third-stage sleeve 8.

[0061] The secondary inner roller 11 and the primary outer roller 22 can assist the primary sleeve 12 in retracting into the secondary sleeve 10 or extending out of the secondary sleeve 10; the primary outer limiting plate 21 and the secondary inner limiting plate 20 engage to limit the movement and prevent the primary sleeve 12 from completely dislodging from the secondary sleeve 10.

[0062] The fixed platform 13 is used to fix the high-pressure nozzle or the directional multi-dimensional automated cleaning system.

[0063] Through the multi-stage sleeve stacking design, the spray cleaning can be carried out layer by layer from top to bottom, which is more efficient and suitable for cleaning tanks and vessels of different heights and widths.

[0064] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automated cleaning and lifting system, comprising a base (1), characterized in that, The base (1) is hinged to the outer periphery with several outward expansion support components. The base (1) is hollow and open at the top. The base (1) is fitted with a telescopic mechanism (23). The telescopic mechanism (23) is fitted with a multi-level sleeve layered on the outside. The multi-level sleeves are stacked one level from the outside to the inside in the base (1). The top of the innermost sleeve is provided with a fixed platform (13). The fixed platform (13) is used to fix the high-pressure nozzle or the directional multi-dimensional automated cleaning system. The free end of the telescopic rod at the top of the telescopic mechanism (23) is fixed to the bottom surface of the fixed platform (13). The base (1) is a hollow square tube with an open top. The bottom of the base (1) is a circular support plate. The base (1) and the circular support plate are fixed together by setting triangular reinforcing ribs. The base (1) has a number of auxiliary support rods (2) hinged to the bottom surface of the bottom support plate, and the free end of the auxiliary support rods (2) is provided with end pads (3). The outward expansion support assembly includes a double-section telescopic rod (5), which is fixed between the two sections by a through-hole fixing pin (6). Pulling out the fixing pin (6) can retract the telescopic rod and extend it. The telescopic rod is fixed by inserting the fixing pin (6). The free end of the telescopic rod (5) is provided with a foot pad (4). The base (1) is fitted with a three-stage sleeve (8), the three-stage sleeve (8) is fitted with a two-stage sleeve (10), the two-stage sleeve (10) is fitted with a first-stage sleeve (12), and the fixed platform (13) is set on the top surface of the first-stage sleeve (12). The upper part of the inner wall of the base (1) is provided with an inner roller (7) and an inner limiting plate (14). The inner limiting plate (14) is located below the inner roller (7). The lower end of the outer wall of the three-stage sleeve (8) is provided with a three-stage outer roller (16) and a three-stage outer limiting plate (15). The three-stage outer limiting plate (15) is located above the three-stage outer roller (16). The inner roller (7) and the three-stage outer roller (16) can assist the three-stage sleeve (8) to retract into the base (1) or extend out of the base (1). The three-stage outer limiting plate (15) is located below the inner limiting plate (14). The three-stage outer limiting plate (15) and the inner limiting plate (14) engage and limit the three-stage sleeve (8) to prevent it from completely coming out of the base (1). The upper part of the inner wall of the third-stage sleeve (8) is provided with a third-stage inner roller (9) and a third-stage inner limiting plate (17). The third-stage inner limiting plate (17) is located below the third-stage inner roller (9). The lower end of the outer wall of the second-stage sleeve (10) is provided with a second-stage outer limiting plate (18) and a second-stage outer roller (19). The second-stage outer limiting plate (18) is located above the second-stage outer roller (19). The third-stage inner roller (9) and the second-stage outer roller (19) can assist the second-stage sleeve (10) to retract into the third-stage sleeve (8) or extend out of the third-stage sleeve (8). The second-stage outer limiting plate (18) is located below the third-stage inner limiting plate (17). The second-stage outer limiting plate (18) and the third-stage inner limiting plate (17) engage and limit the second-stage sleeve (10) to prevent it from completely coming out of the third-stage sleeve (8). The upper part of the inner wall of the secondary sleeve (10) is provided with a secondary inner roller (11) and a secondary inner limiting plate (20), the secondary inner limiting plate (20) is located below the secondary inner roller (11), the lower end of the outer wall of the primary sleeve (12) is provided with a primary outer limiting plate (21) and a primary outer roller (22), the primary outer limiting plate (21) is located above the primary outer roller (22); the secondary inner roller (11) and the primary outer roller (22) can assist the primary sleeve (12) to retract into the secondary sleeve (10) or extend out of the secondary sleeve (10); the primary outer limiting plate (21) is located below the secondary inner limiting plate (20), and the primary outer limiting plate (21) and the secondary inner limiting plate (20) engage and limit the primary sleeve (12) to prevent it from completely dislodging from the secondary sleeve (10); Both the end pad (3) and the foot pad (4) are made of elastic material; The telescopic mechanism (23) is one of a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder; Each layer has four sets of inner rollers, one pair per set, for a total of four pairs; each layer has four sets of outer rollers, one pair per set, for a total of four pairs; each layer has four outer limiting plates; and each layer has four inner limiting plates.

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