A multifunctional portable manhole cover opening tool and a method of using the same

Abstract

This application discloses a multifunctional portable manhole cover opening tool and its usage method. The manhole cover opening tool includes a movable frame and a fixed frame. The fixed frame is mounted on the movable frame, and a horizontally arranged driving plate is slidably connected to the fixed frame. A bearing plate is fixedly connected to the lower side wall of the driving plate, and an installation plate is rotatably connected to the lower end of the bearing plate. Four equally spaced ring-shaped receiving blocks are fixedly connected to the lower side of the installation plate. Each receiving block has an installation sleeve fixedly connected to its outer end, and a dust removal rod is installed inside each installation sleeve. The installation plate drives the dust removal rod to move along the gap between the manhole cover and the frame and scrape away the debris. In this application, before opening the manhole cover, the dust removal rod rotates along the edge of the manhole cover to remove dust and other debris accumulated and adhered between the manhole cover and the frame, causing the manhole cover to gradually loosen. This avoids damage to the manhole cover due to blindly applying force and also effectively improves the opening efficiency of the manhole cover.

Description

Technical Field

[0001] This application relates to the technical field of equipment for municipal manhole covers, and more specifically, to a multifunctional portable manhole cover opening tool and its usage method. Background Technology

[0002] When inspecting municipal pipelines, it is often necessary to open manhole covers for construction. Since manhole covers are usually difficult to open by hand, portable manhole cover opening tools are essential for workers to improve efficiency and reduce the difficulty of opening them. In practice, the manhole cover opening tool is usually connected to the manhole cover first, and then pulled upwards. This method is time-consuming and labor-intensive, greatly increasing the workload of construction workers. Existing technology publication number CN215558847U provides a manhole cover opening tool for underground pipeline surveying. This device, by setting a positioning hook and a movable hook, can easily and quickly lift the manhole cover, making it convenient to operate and saving time and effort.

[0003] Although this manhole cover opening tool eliminates the need for manual opening and offers significant labor-saving benefits, many manhole covers, after prolonged exposure to wind and sun and long periods of inactivity, often accumulate a lot of sand, dust, and other debris between the cover and frame. When using this tool to open such manhole covers, one often has to blindly apply more force, which not only damages the cover and affects its normal use but also reduces the efficiency of municipal maintenance.

[0004] In view of this, we propose a multifunctional portable manhole cover opening tool and its usage method. Summary of the Invention

[0005] To overcome a series of defects in the existing technology, the purpose of this patent is to provide a multifunctional portable manhole cover opening tool, including a mobile frame 1 and a support plate 28. Several brake wheels 4 are fixedly installed on the bottom end of the mobile frame 1. An installation plate 2 is rotatably connected to the lower end of the support plate 28. Four receiving blocks 19 are arranged in a ring with equal spacing on the lower side of the installation plate 2. An installation sleeve 18 is fixedly connected to the outer end of each receiving block 19. A dust removal rod 6 is installed inside each installation sleeve 18. A rotating mechanism is also installed on the installation plate 2, which can drive the installation plate 2 to rotate. Telescopic rods 13 are also provided on the lower side of the two receiving blocks 19 located on the front and rear sides. A chuck 15 is rotatably connected to the lower end of each telescopic rod 13. A lifting mechanism is also installed on the mobile frame 1, which can drive the installation plate 2 to move up and down.

[0006] In the above technical solution, the dust removal rod 6 is aligned with the gap between the manhole cover and the frame. Under the action of the rotating mechanism, the mounting plate 2 drives the receiving block 19 and the dust removal rod 6 to rotate. The dust removal rod 6 then moves along the gap between the manhole cover and the frame, scraping away dust and other debris. After a suitable period of time, the claw 15 is inserted under the manhole cover through the hole and rotated to lock the manhole cover in place. Then, under the action of the lifting mechanism, the claw 15 can move the manhole cover upward to open it. Removing the debris accumulated between the manhole cover and the frame before opening the manhole cover can effectively avoid damage to the manhole cover caused by blindly applying force, and can also effectively improve the opening efficiency of the manhole cover.

[0007] As an optional solution to the technical solution of this application, the rotating mechanism includes a first motor 11 fixedly installed on the upper side wall of the bearing plate 28 and an internal gear ring 3 slidably sleeved on the bearing plate 28. The lower end of the internal gear ring 3 is fixedly connected to the mounting plate 2. A first gear 12 is fixedly connected to the output end of the first motor 11, and the first gear 12 meshes with the internal gear ring 3.

[0008] In the above technical solution, under the action of the first motor 11, the first gear 12 rotates. Since the first gear 12 is meshed with the internal gear ring 3, the internal gear ring 3 will drive the mounting plate 2 and the dust removal rod 6 to rotate.

[0009] As an optional solution to the technical solution of this application, the lifting mechanism includes a driving plate 29 fixedly installed on the bearing plate 28 and a fixed frame 14 installed on one side of the movable frame 1. A second motor 17 is fixedly installed on the fixed frame 14. A lead screw 16 is fixedly connected to the output end of the second motor 17. The driving plate 29 is threadedly connected to the lead screw 16, and the driving plate 29 is slidably connected to the fixed frame 14.

[0010] In the above technical solution, under the action of the second motor 17, the lead screw 16 rotates, and under the limiting action of the fixed frame 14, the drive plate 29 drives the mounting plate 2 and the claw 15 to move up and down.

[0011] As an optional solution of the technical solution in this application, the lower sidewalls of the two receiving blocks 19 located on the front and rear sides are provided with sliding grooves 1901, and sliders 21 are slidably limited in the sliding grooves 1901. The two sliders 21 are respectively connected and fixed to the corresponding telescopic rods 13. A linear drive is also installed on the upper side of the receiving block 19, which can drive the receiving block 19 to move linearly.

[0012] In the above technical solution, the telescopic rod 13 and the claw 15 can be moved by the slider 21 so that they can be accurately inserted into the underside of the manhole cover. At the same time, under the action of linear drive, the receiving block 19 can drive the dust removal rod 6 to move linearly. This makes the technical solution applicable to manhole covers of different specifications and sizes, thus improving the applicability of the technical solution.

[0013] As an optional solution to the technical solution in this application, the linear drive includes a drive mechanism, a second gear 5 mounted on the lower side of the mounting plate 2, and four limiting sleeves 9 fixed on the mounting plate 2, with each of the four limiting sleeves 9 corresponding to a receiving block 19.

[0014] The receiving block 19 is constrained by and slidably connected to the corresponding limiting sleeve 9, and a driving rod 20 is fixedly installed on the upper side wall of the inner end of the receiving block 19.

[0015] The second gear 5 has four arc-shaped push grooves 501 that correspond one-to-one with the drive rod 20. The four arc-shaped push grooves 501 are distributed in a ring at equal intervals around the axis of the second gear 5.

[0016] The sliding limit of the drive rod 20 is located in the corresponding arc-shaped push groove 501, and the drive mechanism can drive the second gear 5 to rotate.

[0017] In the above technical solution, under the action of the drive mechanism, the second gear 5 rotates, and under the pushing action of the arc-shaped push groove 501 and the limiting action of the limiting sleeve 9, the drive rod 20 then drives the corresponding receiving block 19 to move linearly along the limiting sleeve 9.

[0018] As an optional solution to the technical solution of this application, the driving mechanism includes a rotating shaft 23 rotatably mounted on the mounting plate 2. The lower end of the rotating shaft 23 extends to the lower side of the mounting plate 2 and is sleeved with a gear post 10 that meshes with the second gear 5. The upper end of the rotating shaft 23 extends to the upper side of the second gear 5 and is fixedly provided with an adjusting handwheel 24. Several fixing plates 27 are fixedly mounted on the mounting plate 2. The several fixing plates 27 are distributed in a ring at equal intervals around the rotating shaft 23. A limiting rod 26 is threadedly connected to the fixing plate 27. A limiting disk 25 is fixedly sleeved on the rotating shaft 23. The limiting disk 25 is densely covered with multiple positioning holes 2501 in a ring. The limiting rod 26 is movably inserted into the positioning holes 2501.

[0019] In the above technical solution, rotating the adjusting handwheel 24 rotates the rotating shaft 23, and the gear 10 rotates accordingly. Since the gear 10 is meshed with the second gear 5, the second gear 5 rotates immediately. After adjusting to the appropriate position, the limiting rod 26 is turned to extend into the positioning hole 2501 to prevent the second gear 5 from moving arbitrarily.

[0020] As an optional solution to the technical solution of this application, the ash removal rod 6 is slidably connected to the mounting sleeve 18, and a first spring 22 is fixedly connected between the ash removal rod 6 and the mounting sleeve 18.

[0021] In the above technical solution, under the action of the first spring 22, the dust removal rod 6 can extend and retract to a certain extent, thereby avoiding damage to the dust removal rod 6 by stones or other objects.

[0022] As an optional solution to the technical solution of this application, a striking component 7 is also installed on the lower side of the driving plate 29. The striking component 7 includes a mounting base 701 fixedly installed on the bearing plate 28 and a rotating base 704 fixedly installed on the front and rear limit sleeves 9. Several sliding handles 702 are slidably passed through both ends of the mounting base 701. The lower ends of the sliding handles 702 extend to the lower side of the mounting base 701 and are fixedly connected to a striking plate 703. The lower end surface of the striking plate 703 is densely covered with balls 706. The upper ends of the sliding handles 702 extend to the upper side of the mounting base 701 and are fixedly installed with a driving disc 708. A rotating wheel 705 is rotatably connected to the rotating base 704. The rotating wheel 705 is in active contact with the driving disc 708. The portion of the sliding handle 702 located on the lower side of the mounting base 701 is sleeved with a second spring 707.

[0023] Here, a connecting cylinder is rotatably connected to the axis of the second gear 5. The upper end of the connecting cylinder is fixedly connected to the center of the lower side wall of the mounting plate 2. A connecting shaft is fixedly connected to the middle of the upper side wall of the mounting base 701. The upper end of the connecting shaft slides upward through the second gear 5, the connecting cylinder, and the mounting plate 2 in sequence, extending to the upper side of the mounting plate 2 and being fixedly connected to the bearing plate 28. The axes of the mounting plate 2, the internal gear ring 3, the second gear 5, the bearing plate 28, the connecting cylinder, and the connecting shaft coincide.

[0024] In the above technical solution, when the limiting sleeve 9 rotates, the rotating seat 704 and the rotating wheel 705 rotate accordingly. When the rotating wheel 705 contacts the driving disc 708, the driving disc 708 drives the sliding handle 702 and the striking plate 703 to move upward. When the rotating wheel 705 disengages from the driving disc 708, under the action of the second spring 707, the striking plate 703 falls down to strike the manhole cover. The manhole cover itself vibrates, causing the manhole cover and the manhole frame to gradually loosen, thus making it easier to open the manhole cover.

[0025] As an optional solution to the technical solution of this application, the mounting plate 2 is also equipped with a dust removal component 8. The dust removal component 8 includes an induced draft fan 802 fixedly mounted on the mounting plate 2 and a connecting box 801 fixedly mounted on the mounting plate 2. A sealing cover 804 is inserted into the connecting box 801, and a connecting pipe 803 passes through the connecting box 801. One end of the connecting pipe 803 located inside the connecting box 801 is threadedly connected to a filter cartridge 806, and a dust suction nozzle 805 is fixedly connected to the end of the connecting pipe 803 away from the connecting box 801.

[0026] In the above technical solution, under the action of the induced draft fan 802, the connection box 801 is in a negative pressure state. The dust removed between the manhole cover and the manhole frame then enters the filter cartridge 806 through the dust suction nozzle 805 and the connecting pipe 803. On the one hand, this can prevent the dust from falling back into the gap between the manhole cover and the manhole frame and affecting the opening of the manhole cover. On the other hand, it can also prevent the dust from falling into the manhole and causing adverse effects on municipal maintenance work.

[0027] The present invention also aims to provide a method for using a multifunctional portable manhole cover opening tool, comprising the following steps:

[0028] Twist multiple limit rods 26 in sequence to disengage the limit rods 26 from the limit plate 25, rotate the adjusting handwheel 24 to drive the rotating shaft 23 to rotate, drive the second gear 5 to rotate through the toothed column 10, and under the action of the limit sleeve 9, drive rod 20 to drive the corresponding receiving block 19 to move linearly along the radial direction of the second gear 5 until the ash removal rod 6 is aligned with the gap between the manhole cover and the manhole frame.

[0029] The first motor 11 is started to drive the first gear 12 to rotate, thereby driving the mounting plate 2 and the dust removal rod 6 to rotate. At this time, the dust removal rod 6 moves along the gap between the manhole cover and the manhole frame and scrapes away the dust and other garbage therein.

[0030] When the limit sleeve 9 rotates, the rotating seat 704 and the rotating wheel 705 rotate accordingly. When the rotating wheel 705 contacts the drive plate 708, the drive plate 708 drives the sliding handle 702 and the striking plate 703 to move upward. When the rotating wheel 705 disengages from the drive plate 708, the striking plate 703 falls down under the action of the second spring 707 to strike the manhole cover.

[0031] At the same time, under the action of the induced draft fan 802, the connection box 801 is under negative pressure. The dust removed between the manhole cover and the frame then enters the filter cartridge 806 through the dust suction nozzle 805 and the connecting pipe 803. This continues until the garbage accumulated between the manhole cover and the frame is completely removed.

[0032] Insert the chuck 15 through the hole in the manhole cover and rotate it to lock the manhole cover. Start the second motor 17 to drive the screw 16 to rotate. Under the limiting action of the fixed frame 14, the drive plate 29 will then drive the mounting plate 2, the chuck 15 and the manhole cover to move upward. At this time, the manhole cover opening operation is completed.

[0033] Compared with the prior art, the beneficial effects of this application are as follows:

[0034] 1) In this application, before the manhole cover is opened, the dust removal rod will rotate along the edge of the manhole cover to remove the dust and other garbage that accumulates and adheres between the manhole cover and the frame, so that the manhole cover will gradually loosen. On the one hand, this can avoid blindly applying force and causing damage to the manhole cover, and on the other hand, it can effectively improve the opening efficiency of the manhole cover.

[0035] 2) In this application, the ash removal rod can remove garbage between manhole covers and manhole frames of different sizes and specifications, while the claws can also fix manhole covers of different sizes and specifications, which effectively improves the applicability of this application;

[0036] 3) In this application, during the process of removing garbage between the manhole cover and the frame, the manhole cover can be tapped intermittently to cause it to vibrate, thereby gradually loosening it and making it easier to open. At the same time, the dust removal component can effectively remove the removed garbage, which on the one hand prevents the dust from falling back into the gap between the manhole cover and the frame and affecting the opening of the manhole cover, and on the other hand prevents the dust from falling into the manhole and adversely affecting municipal maintenance work. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the multifunctional portable manhole cover opening tool disclosed in a preferred embodiment of this application;

[0038] Figure 2 This is a partial structural diagram of one side of the mounting plate in the multifunctional portable manhole cover opening tool disclosed in the preferred embodiment of this application;

[0039] Figure 3 This is a structurally disassembled schematic diagram of the second gear and the limiting sleeve in the multifunctional portable manhole cover opening tool disclosed in the preferred embodiment of this application;

[0040] Figure 4 This is an enlarged schematic diagram of the structure at point A in the multifunctional portable manhole cover opening tool disclosed in the preferred embodiment of this application;

[0041] Figure 5 This is a cross-sectional view of the receiving block in the multifunctional portable manhole cover opening tool disclosed in the preferred embodiment of this application;

[0042] Figure 6This is a cross-sectional view of the mounting sleeve in the multifunctional portable manhole cover opening tool disclosed in the preferred embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the striking component in the multifunctional portable manhole cover opening tool disclosed in a preferred embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the ash removal component in the multifunctional portable manhole cover opening tool disclosed in a preferred embodiment of this application.

[0045] The attached figures are labeled as follows:

[0046] 1. Movable frame; 2. Mounting plate; 3. Internal gear ring; 4. Brake wheel; 5. Second gear; 6. Ash removal rod; 7. Tapping assembly; 8. Ash removal assembly; 9. Limiting sleeve; 10. Gear column; 11. First motor; 12. First gear; 13. Telescopic rod; 14. Fixed frame; 15. Claw; 16. Lead screw; 17. Second motor; 18. Mounting sleeve; 19. Receiving block; 20. Driving rod; 21. Slider; 22. First spring; 23. Rotating shaft; 24. Adjusting handwheel; 25. Limiting plate; 26. Limiting rod; 27. Fixed plate; 28. Bearing plate; 29. ​​Driving plate;

[0047] 501. Arc-shaped push groove;

[0048] 701. Mounting base; 702. Slide handle; 703. Striking plate; 704. Rotating base; 705. Rotary wheel; 706. Ball bearing; 707. Second spring; 708. Drive plate;

[0049] 801. Connecting box; 802. Exhaust fan; 803. Connecting pipe; 804. Sealing cover; 805. Dust suction nozzle; 806. Filter cartridge;

[0050] 1901, Slide;

[0051] 2501, Positioning hole. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some embodiments of this invention, but not all embodiments.

[0053] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0055] In a broad embodiment of the present invention, a multifunctional portable manhole cover opening tool includes a movable frame 1 and a fixed frame 14. The fixed frame 14 is mounted on the movable frame 1. The fixed frame 14 is slidably connected to a horizontally arranged driving plate 29. A bearing plate 28 is fixedly connected to the lower side wall of the driving plate 29. An installation plate 2 is rotatably connected to the lower end of the bearing plate 28. Four receiving blocks 19 distributed in a ring at equal intervals are fixedly connected to the lower side of the installation plate 2. An installation sleeve 18 is fixedly connected to the outer end of each receiving block 19. A dust removal rod 6 is installed inside each installation sleeve 18. The installation plate 2 drives the dust removal rod 6 to move along the gap between the manhole cover and the manhole frame and scrape off the garbage therein.

[0056] Preferably, the mounting plate 2 is also equipped with a rotating mechanism, which is used to drive the mounting plate 2 to rotate. The rotating mechanism includes a first motor 11 fixedly mounted on the upper side wall of the support plate 28 and an internal gear ring 3 slidably sleeved on the support plate 28. The lower end of the internal gear ring 3 is fixedly connected to the mounting plate 2. A first gear 12 is fixedly connected to the output end of the first motor 11, and the first gear 12 meshes with the internal gear ring 3.

[0057] Preferably, a lifting mechanism is also installed on the fixed frame 14. The lifting mechanism is used to drive the mounting plate 2 to move up and down. The lifting mechanism includes a second motor 17, which is fixedly installed on the fixed frame 14. The output end of the second motor 17 is fixedly connected to a lead screw 16 that is threadedly connected to the driving plate 29.

[0058] Preferably, the lower sidewalls of the two receiving blocks 19 located on the front and rear sides are provided with sliding grooves 1901, and sliders 21 are slidably limited in the sliding grooves 1901. The two sliders 21 are respectively connected and fixed to the corresponding telescopic rods 13. A linear drive is also installed on the upper side of the receiving block 19. The linear drive is used to drive the receiving block 19 to move linearly. The linear drive includes a drive mechanism, a second gear 5 installed on the lower side of the mounting plate 2, and four limiting sleeves 9 fixed on the mounting plate 2. The four limiting sleeves 9 are arranged one-to-one with the receiving blocks 19. The receiving blocks 19 are limited by the corresponding limiting sleeves 9 and slidably connected to them. The upper sidewall of the inner end of the receiving block 19 is fixedly installed with a driving rod 20. The second gear 5 is provided with four arc-shaped pushing grooves 501 arranged one-to-one with the driving rods 20. The four arc-shaped pushing grooves 501 are distributed in a ring at equal intervals around the axis of the second gear 5. The driving rod 20 is slidably limited in the corresponding arc-shaped pushing grooves 501. The drive mechanism is used to drive the second gear 5 to rotate.

[0059] Preferably, the driving mechanism includes a rotating shaft 23 rotatably mounted on the mounting plate 2. The lower end of the rotating shaft 23 extends to the lower side of the mounting plate 2 and is sleeved with a gear post 10 that meshes with the second gear 5. The upper end of the rotating shaft 23 extends to the upper side of the second gear 5 and is fixedly provided with an adjusting handwheel 24. Several fixing plates 27 are fixedly mounted on the mounting plate 2. The several fixing plates 27 are distributed in a ring at equal intervals around the rotating shaft 23. A limiting rod 26 is threadedly connected to the fixing plate 27. A limiting disk 25 is fixedly sleeved on the rotating shaft 23. The limiting disk 25 is densely covered with multiple positioning holes 2501 in a ring. The limiting rod 26 is movably inserted into the positioning holes 2501.

[0060] Preferably, the ash removal rod 6 is slidably connected to the mounting sleeve 18, and a first spring 22 is fixedly connected between the ash removal rod 6 and the mounting sleeve 18. Under the action of the first spring 22, the ash removal rod 6 can extend and retract up and down, thereby preventing the ash removal rod 6 from being damaged.

[0061] Preferably, a striking assembly 7 is also installed on the lower side of the driving plate 29. The striking assembly 7 includes a mounting base 701 fixedly installed on the bearing plate 28 and a rotating base 704 fixedly installed on the front and rear limit sleeves 9. Both ends of the mounting base 701 are slidably provided with a plurality of sliding handles 702. The lower ends of the sliding handles 702 extend to the lower side of the mounting base 701 and are fixedly connected to a striking plate 703. The lower end surface of the striking plate 703 is densely covered with balls 706. The upper ends of the sliding handles 702 extend to the upper side of the mounting base 701 and are fixedly installed with a driving disc 708. A rotating wheel 705 is rotatably connected to the rotating base 704. The rotating wheel 705 is in active contact with the driving disc 708. The portion of the sliding handle 702 located on the lower side of the mounting base 701 is sleeved with a second spring 707.

[0062] Preferably, the mounting plate 2 is further equipped with a dust removal component 8. The dust removal component 8 includes an induced draft fan 802 fixedly mounted on the mounting plate 2 and a connecting box 801 fixedly mounted on the mounting plate 2. A sealing cover 804 is inserted into the connecting box 801, and a connecting pipe 803 passes through the connecting box 801. One end of the connecting pipe 803 located inside the connecting box 801 is threadedly connected to a filter cartridge 806, and a dust suction nozzle 805 is fixedly connected to the end of the connecting pipe 803 away from the connecting box 801.

[0063] Preferably, telescopic rods 13 are also provided on the lower side of the two receiving blocks 19 located on the front and rear sides. The lower end of each telescopic rod 13 is rotatably connected to a pawl 15, and several brake wheels 4 are fixed on the bottom end of the moving frame 1.

[0064] Preferably, a connecting cylinder is rotatably connected to the axis of the second gear 5, the upper end of the connecting cylinder is fixedly connected to the center of the lower side wall of the mounting plate 2, and a connecting shaft is fixedly connected to the middle of the upper side wall of the mounting base 701. The upper end of the connecting shaft slides upward through the second gear 5, the connecting cylinder, and the mounting plate 2 in sequence, extending to the upper side of the mounting plate 2 and being fixedly connected to the bearing plate 28. The axes of the mounting plate 2, the internal gear ring 3, the second gear 5, the bearing plate 28, the connecting cylinder, and the connecting shaft coincide.

[0065] The present invention also aims to provide a method for using a multifunctional portable manhole cover opening tool, comprising the following steps:

[0066] Twist multiple limit rods 26 in sequence to disengage the limit rods 26 from the limit plate 25, rotate the adjusting handwheel 24 to drive the rotating shaft 23 to rotate, drive the second gear 5 to rotate through the toothed column 10, and under the action of the limit sleeve 9, drive rod 20 to drive the corresponding receiving block 19 to move linearly along the radial direction of the second gear 5 until the ash removal rod 6 is aligned with the gap between the manhole cover and the manhole frame.

[0067] The first motor 11 is started to drive the first gear 12 to rotate, thereby driving the mounting plate 2 and the dust removal rod 6 to rotate. At this time, the dust removal rod 6 moves along the gap between the manhole cover and the manhole frame and scrapes away the garbage therein.

[0068] When the limit sleeve 9 rotates, the rotating seat 704 and the rotating wheel 705 rotate accordingly. When the rotating wheel 705 contacts the drive plate 708, the drive plate 708 drives the sliding handle 702 and the striking plate 703 to move upward. When the rotating wheel 705 disengages from the drive plate 708, the striking plate 703 falls down under the action of the second spring 707 to strike the manhole cover.

[0069] At the same time, under the action of the induced draft fan 802, the connection box 801 is under negative pressure. The dust removed between the manhole cover and the frame then enters the filter cartridge 806 through the dust suction nozzle 805 and the connecting pipe 803. This continues until the garbage accumulated between the manhole cover and the frame is completely removed.

[0070] Insert the chuck 15 through the hole in the manhole cover and rotate it to lock the manhole cover. Start the second motor 17 to drive the screw 16 to rotate. Under the limiting action of the fixed frame 14, the drive plate 29 will then drive the mounting plate 2, the chuck 15 and the manhole cover to move upward. At this time, the manhole cover opening operation is completed.

[0071] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, and the present invention will be further described in detail.

[0072] Reference Figure 1 and Figure 2This preferred embodiment discloses a multifunctional portable manhole cover opening tool, including a mobile frame 1, a lifting mechanism, and a support plate 28. Several brake wheels 4 are fixedly installed on the bottom end of the mobile frame 1. An installation plate 2 is rotatably connected to the lower end of the support plate 28. Four receiving blocks 19 distributed in a ring at equal intervals are installed on the lower side of the installation plate 2. An installation sleeve 18 is fixedly connected to the outer end of the receiving block 19. A dust removal rod 6 is installed inside each installation sleeve 18. A rotating mechanism is also installed on the installation plate 2, which can drive the installation plate 2 to rotate.

[0073] The rotating mechanism includes a first motor 11 fixedly installed on the upper side wall of the support plate 28 and an internal gear ring 3 slidably sleeved on the support plate 28. The lower end of the internal gear ring 3 is fixedly connected to the mounting plate 2. A first gear 12 is fixedly connected to the output end of the first motor 11, and the first gear 12 meshes with the internal gear ring 3.

[0074] The two receiving blocks 19 located on the front and rear sides are also provided with telescopic rods 13. The lower ends of the telescopic rods 13 are rotatably connected with claws 15. The lifting mechanism can drive the mounting plate 2 to move up and down.

[0075] The lifting mechanism includes a drive plate 29 fixedly installed on the bearing plate 28 and a fixed frame 14 installed on one side of the movable frame 1. A second motor 17 is fixedly installed on the fixed frame 14. A lead screw 16 is fixedly connected to the output end of the second motor 17. The drive plate 29 is threadedly connected to the lead screw 16, and the drive plate 29 is slidably connected to the fixed frame 14.

[0076] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The two receiving blocks 19 located on the front and rear sides each have a sliding groove 1901 on their lower sidewalls. Each sliding groove 1901 has a slider 21 that is slidably limited. The two sliders 21 are respectively connected and fixed to the corresponding telescopic rods 13. A linear drive is also installed on the upper side of the receiving block 19. The linear drive can drive the receiving block 19 to move in a straight line.

[0077] The linear drive includes a drive mechanism, a second gear 5 mounted on the lower side of the mounting plate 2, and four limiting sleeves 9 fixed on the mounting plate 2. The four limiting sleeves 9 are arranged one-to-one with the receiving blocks 19. The receiving blocks 19 are constrained by the corresponding limiting sleeves 9 and are slidably connected to them. The upper inner wall of each receiving block 19 is fixedly mounted with a driving rod 20. The second gear 5 has four arc-shaped pushing grooves 501 arranged one-to-one with the driving rods 20. The four arc-shaped pushing grooves 501 are distributed in a ring at equal intervals around the axis of the second gear 5. The driving rod 20 is slidably limited in the corresponding arc-shaped pushing groove 501. The drive mechanism can drive the second gear 5 to rotate.

[0078] The driving mechanism includes a rotating shaft 23 that is rotatably mounted on the mounting plate 2. The lower end of the rotating shaft 23 extends to the lower side of the mounting plate 2 and is sleeved with a gear post 10 that meshes with the second gear 5. The upper end of the rotating shaft 23 extends to the upper side of the second gear 5 and is fixedly provided with an adjusting handwheel 24. Several fixing plates 27 are fixedly mounted on the mounting plate 2. The fixing plates 27 are distributed in a ring at equal intervals around the rotating shaft 23. A limiting rod 26 is threadedly connected to the fixing plate 27. A limiting disc 25 is fixedly sleeved on the rotating shaft 23. The limiting disc 25 is densely covered with multiple positioning holes 2501 in a ring. The limiting rod 26 is movably inserted into the positioning holes 2501.

[0079] Reference Figure 6 The dust removal rod 6 is slidably connected to the mounting sleeve 18. A first spring 22 is fixedly connected between the dust removal rod 6 and the mounting sleeve 18. The setting of the first spring 22 gives the dust removal rod 6 a certain degree of flexibility, effectively preventing the dust removal rod 6 from being damaged during the dust removal process.

[0080] Reference Figure 3 Figure 7 A striking assembly 7 is also installed on the lower side of the driving plate 29. The striking assembly 7 includes a mounting base 701 fixedly installed on the bearing plate 28 and a rotating base 704 fixedly installed on the front and rear limit sleeves 9. Several sliding handles 702 are slidably passed through both ends of the mounting base 701. The lower ends of the sliding handles 702 extend to the lower side of the mounting base 701 and are fixedly connected to a striking plate 703. The lower end surface of the striking plate 703 is densely covered with balls 706. The upper ends of the sliding handles 702 extend to the upper side of the mounting base 701 and are fixedly installed with a driving disc 708. A rotating wheel 705 is rotatably connected to the rotating base 704. The rotating wheel 705 is in active contact with the driving disc 708. The portion of the sliding handle 702 located on the lower side of the mounting base 701 is sleeved with a second spring 7077.

[0081] Reference Figure 2 and Figure 8 The mounting plate 2 is also equipped with a dust removal component 8. The dust removal component 8 includes an induced draft fan 802 fixedly mounted on the mounting plate 2 and a connecting box 801 fixedly mounted on the mounting plate 2. A sealing cover 804 is inserted into the connecting box 801. A connecting pipe 803 passes through the connecting box 801. One end of the connecting pipe 803 located inside the connecting box 801 is threadedly connected to a filter cartridge 806. A dust suction nozzle 805 is fixedly connected to the end of the connecting pipe 803 away from the connecting box 801.

[0082] The implementation principle of a multifunctional portable manhole cover opening tool in this application embodiment is as follows: When relevant personnel need to open the manhole cover during municipal maintenance, they turn multiple limiting rods 26 in sequence to disengage the limiting rods 26 from the limiting plate 25, rotate the adjusting handwheel 24 to drive the rotating shaft 23 to rotate, and drive the second gear 5 to rotate through the toothed column 10. Under the action of the limiting sleeve 9, the driving rod 20 then drives the corresponding receiving block 19 to move linearly along the radial direction of the second gear 5 until the dust removal rod 6 is aligned with the gap between the manhole cover and the manhole frame.

[0083] Subsequently, under the action of the first motor 11, the first gear 12 rotates. Since the first gear 12 is meshed with the internal gear ring 3, the internal gear ring 3 will drive the mounting plate 2 and the dust removal rod 6 to rotate. The dust removal rod 6 then moves along the gap between the manhole cover and the manhole frame to scrape away the dust and other garbage.

[0084] When the limiting sleeve 9 rotates, the rotating seat 704 and the rotating wheel 705 rotate accordingly. When the rotating wheel 705 contacts the driving disc 708, the driving disc 708 drives the sliding handle 702 and the striking plate 703 to move upward. When the rotating wheel 705 disengages from the driving disc 708, the striking plate 703 falls down under the action of the second spring 707 to strike the manhole cover. The manhole cover itself vibrates, causing the manhole cover and the manhole frame to gradually loosen.

[0085] Meanwhile, under the action of the induced draft fan 802, the connecting box 801 is under negative pressure, and the dust removed between the manhole cover and the frame then enters the filter cartridge 806 through the suction nozzle 805 and the connecting pipe 803. This continues for an appropriate period of time until all the garbage accumulated between the manhole cover and the frame is completely removed.

[0086] The worker then inserts the clamp 15 through the hole in the manhole cover and rotates it to lock the cover in place. Under the action of the second motor 17, the lead screw 16 rotates, and under the limiting action of the fixing frame 14, the drive plate 29 subsequently moves the mounting plate 2, the clamp 15, and the manhole cover upwards. This completes the operation of opening the manhole cover.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional portable manhole cover opening tool, comprising a movable frame (1) and a fixed frame (14), characterized in that, The fixed frame (14) is installed on the movable frame (1). The fixed frame (14) is slidably connected to a horizontally arranged driving plate (29). The lower side wall of the driving plate (29) is fixedly connected to a bearing plate (28). The lower end of the bearing plate (28) is rotatably connected to an installation plate (2). The lower side of the installation plate (2) is fixedly connected to four ring-shaped and equally spaced receiving blocks (19). The outer ends of the receiving blocks (19) are all fixedly connected to an installation sleeve (18). The installation sleeve (18) is installed with a dust removal rod (6). The installation plate (2) drives the dust removal rod (6) to move along the gap between the manhole cover and the manhole frame and scrape off the garbage therein. The two receiving blocks (19) located on the front and rear sides each have a sliding groove (1901) on their lower sidewalls. Each sliding groove (1901) has a sliding block (21) that is slidably limited. The two sliding blocks (21) are respectively connected and fixed to the corresponding telescopic rods (13). A linear drive is also installed on the upper side of the receiving block (19). The linear drive is used to drive the receiving block (19) to move linearly. The linear drive includes a drive mechanism, a second gear (5) installed on the lower side of the mounting plate (2), and four limiting sleeves (9) fixed on the mounting plate (2). The four limiting sleeves (9) are connected to the receiving block (19) and the receiving block (19) to the mounting plate (2). The blocks (19) are set one-to-one. The receiving block (19) is limited by the corresponding limiting sleeve (9) and is slidably connected to it. The upper side wall of the inner end of the receiving block (19) is fixedly installed with a driving rod (20). The second gear (5) has four arc-shaped pushing grooves (501) that are set one-to-one with the driving rod (20). The four arc-shaped pushing grooves (501) are distributed in a ring at equal intervals around the axis of the second gear (5). The driving rod (20) is slidably limited in the corresponding arc-shaped pushing groove (501). The driving mechanism is used to drive the second gear (5) to rotate. The driving mechanism includes a rotating shaft (23) that is rotatably mounted on the mounting plate (2). The lower end of the rotating shaft (23) extends to the lower side of the mounting plate (2) and is fitted with a gear post (10) that meshes with the second gear (5). The upper end of the rotating shaft (23) extends to the upper side of the second gear (5) and is fixedly fitted with an adjusting handwheel (24). Several fixing plates (27) are fixedly mounted on the mounting plate (2). The several fixing plates (27) are distributed in a ring at equal intervals around the rotating shaft (23). A limiting rod (26) is threaded onto the fixing plate (27). A limiting disc (25) is fixedly fitted onto the rotating shaft (23). The limiting disc (25) is densely covered with multiple positioning holes (2501) in a ring. The limiting rod (26) is movably inserted into the positioning hole (2501).

2. The multifunctional portable manhole cover opening tool according to claim 1, characterized in that, The mounting plate (2) is also equipped with a rotating mechanism, which is used to drive the mounting plate (2) to rotate. The rotating mechanism includes a first motor (11) fixedly installed on the upper side wall of the bearing plate (28) and an internal gear ring (3) slidably sleeved on the bearing plate (28). The lower end of the internal gear ring (3) is fixedly connected to the mounting plate (2). The output end of the first motor (11) is fixedly connected to a first gear (12), and the first gear (12) meshes with the internal gear ring (3).

3. The multifunctional portable manhole cover opening tool according to claim 2, characterized in that, The fixed frame (14) is also equipped with a lifting mechanism. The lifting mechanism is used to drive the mounting plate (2) to move up and down. The lifting mechanism includes a second motor (17). The second motor (17) is fixedly installed on the fixed frame (14). The output end of the second motor (17) is fixedly connected to a lead screw (16) that is threadedly connected to the driving plate (29).

4. A multifunctional portable manhole cover opening tool according to claim 3, characterized in that, The ash removal rod (6) is slidably connected to the mounting sleeve (18), and a first spring (22) is fixedly connected between the ash removal rod (6) and the mounting sleeve (18). Under the action of the first spring (22), the ash removal rod (6) can extend and retract up and down, thereby preventing the ash removal rod (6) from being damaged.

5. A multifunctional portable manhole cover opening tool according to claim 4, characterized in that, A striking assembly (7) is also installed on the lower side of the driving plate (29). The striking assembly (7) includes a mounting base (701) fixedly installed on the bearing plate (28) and a rotating base (704) fixedly installed on the front and rear limit sleeves (9). Several sliding handles (702) are slidably provided at both ends of the mounting base (701). The lower ends of the sliding handles (702) extend to the lower side of the mounting base (701) and are fixedly connected to a striking plate (703). The lower end surface of the striking plate (703) is densely covered with ball bearings (706). The upper end of the sliding handle (702) extends to the upper side of the mounting base (701) and is fixedly mounted with a drive plate (708). The rotating base (704) is rotatably connected with a rotating wheel (705). The rotating wheel (705) is in active contact with the drive plate (708). The part of the sliding handle (702) located on the lower side of the mounting base (701) is fitted with a second spring (707).

6. A multifunctional portable manhole cover opening tool according to claim 5, characterized in that, The mounting plate (2) is also equipped with a dust removal component (8). The dust removal component (8) includes an induced draft fan (802) fixedly mounted on the mounting plate (2) and a connecting box (801) fixedly mounted on the mounting plate (2). A sealing cover (804) is inserted into the connecting box (801). A connecting pipe (803) is passed through the connecting box (801). A filter cartridge (806) is threaded to one end of the connecting pipe (803) inside the connecting box (801). A dust suction nozzle (805) is fixedly connected to the other end of the connecting pipe (803) away from the connecting box (801).

7. A multifunctional portable manhole cover opening tool according to claim 6, characterized in that, The two receiving blocks (19) located on the front and rear sides are also provided with telescopic rods (13). The lower ends of the telescopic rods (13) are rotatably connected with claws (15). Several brake wheels (4) are fixed on the bottom of the moving frame (1).

8. The method of using a multifunctional portable manhole cover opening tool according to claim 7, characterized in that, Includes the following steps: Twist multiple limit rods (26) in sequence to disengage the limit rods (26) from the limit plate (25), rotate the adjusting handwheel (24) to drive the rotating shaft (23) to rotate, drive the second gear (5) to rotate through the toothed column (10), and under the action of the limit sleeve (9), the driving rod (20) will then drive the corresponding receiving block (19) to move in a straight line along the radial direction of the second gear (5) until the ash removal rod (6) is aligned with the gap between the well cover and the well frame; The first motor (11) is started to drive the first gear (12) to rotate, thereby driving the mounting plate (2) and the dust removal rod (6) to rotate. At this time, the dust removal rod (6) moves along the gap between the manhole cover and the manhole frame and scrapes off the garbage therein. When the limiting sleeve (9) rotates, the rotating seat (704) and the rotating wheel (705) rotate accordingly. When the rotating wheel (705) contacts the drive plate (708), the drive plate (708) drives the sliding handle (702) and the striking plate (703) to move upward. When the rotating wheel (705) disengages from the drive plate (708), the striking plate (703) falls down to strike the manhole cover under the action of the second spring (707). At the same time, under the action of the blower (802), the connection box (801) is under negative pressure. The dust removed between the manhole cover and the frame then enters the filter cartridge (806) through the dust suction nozzle (805) and the connecting pipe (803). This continues until the garbage accumulated between the manhole cover and the frame is completely removed. Insert the chuck (15) through the hole in the manhole cover and rotate the chuck (15) to lock the manhole cover. Start the second motor (17) to drive the screw (16) to rotate. Under the limiting action of the fixed frame (14), the drive plate (29) will then drive the mounting plate (2), the chuck (15) and the manhole cover to move upward. At this time, the manhole cover opening operation is completed.

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