A manhole auxiliary installation device and installation method for steel box girders

Abstract

This invention relates to the field of steel box girder installation technology, and discloses an auxiliary installation device and method for steel box girder manholes. The device includes a bottom ring and lifting rings fixed to the top of the bottom ring. Multiple lifting rings have cables fixedly fitted onto their upper interior ends, and hooks are fixedly attached to the top of the cables. Two symmetrically arranged rotating rods are rotatably threaded through the side of the bottom ring. A rotating ring is fixedly attached to one end of the two rotating rods. A horizontal plate is fixedly attached to the inner wall of the rotating ring. Multiple symmetrically arranged locking blocks are located at the lower end of the horizontal plate. A support plate slides through the locking blocks, and the support plate is fixedly connected to the inner wall of the rotating ring. The bottom ring, rotating rods, rotating ring, horizontal plate, support plate, locking blocks, connecting rods, hooks, and synchronous clamping mechanism provided by this auxiliary installation device and method allow for rapid switching between the hooks and locking blocks according to the specifications of the manhole, improving the overall versatility of the auxiliary installation device and enhancing the ease of manual installation.

Description

Technical Field

[0001] This invention relates to the field of steel box girder installation technology, specifically to a steel box girder manhole auxiliary installation device and installation method. Background Technology

[0002] Manholes in steel box girders are openings made in steel box girders for personnel to enter and exit. Generally, the location of manholes should be selected in parts of the steel box girder that are convenient for personnel to enter and exit, such as the ends or sides of the box girder. At the same time, after the manholes are installed, the edges of the manholes should be reinforced to prevent deformation or damage when personnel enter and exit.

[0003] A search revealed a patent document with publication number CN219364292U that discloses a temporary sealing structure for a manhole in a steel box girder. Pressing the U-shaped block in the manhole causes a sliding rod to slide within a sliding groove. A limiting block compresses a spring, causing the handle to engage within the U-shaped block. Releasing the U-shaped block causes the limiting block to move upwards under the spring's force, and the sliding rod then causes the U-shaped block to contact the handle, thus securing the top cover. This design facilitates easy movement and enhances safety. Pressing the U-shaped block disengages it from the handle, and rotating the telescopic rod causes it to engage in the groove, closing the top cover and locking it with a lock body.

[0004] However, as can be seen from the aforementioned documents and existing technologies, the overall structure of the manhole is installed by hoisting when it is installed with the steel box girder. During the hoisting process, the manhole is slowly inserted into the side of the steel box girder to complete the connection. The commonly used hoisting method uses hooks for connection. However, since the structure of the manhole is not single and fixed, some manhole surfaces do not have lugs, which means that during the hoisting process, it is necessary to contact other clamping components to clamp the manhole before hoisting. This results in certain limitations in the overall use of the installation device and poor functionality. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a steel box girder manhole auxiliary installation device and method that features multiple clamping and hoisting structures, allowing for rapid selection based on the different manhole structures to assist in the installation of the manhole. This solves the problem that existing hoisting devices have relatively simple internal hoisting structures and cannot quickly assist in the installation of various manholes.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary installation device and method for a steel box girder manhole, comprising a bottom ring and a lifting ring fixedly disposed on the top of the bottom ring, wherein a cable is fixedly sleeved on the upper part of the inner side of a plurality of lifting rings, and a hook is fixedly disposed on the top of the plurality of cable; two symmetrically arranged rotating rods are rotatably passed through the side of the bottom ring, and a rotating ring is fixedly disposed at one end of the two rotating rods; a horizontal plate is fixedly disposed on the inner wall of the rotating ring, and a plurality of symmetrically arranged locking blocks are disposed at the lower end of the horizontal plate; a support plate is slidably passed through the inside of the locking blocks; the support plate is fixedly connected to the inner wall of the rotating ring; and a synchronous clamping mechanism is provided between the plurality of rotating rings for simultaneously driving the plurality of locking blocks to clamp laterally.

[0009] Each of the multiple card blocks has a connecting rod fixedly installed on its top, and the end of the connecting rod extends out of the horizontal plate and is fixedly equipped with a pull hook;

[0010] A rotating plate is fixedly provided at the end of the rotating rod, and a switching hoisting mechanism for limiting the position of the rotating ring is provided between the rotating plate and the outer wall of the bottom ring.

[0011] Preferably, the synchronous clamping mechanism includes a drive shaft, which is rotatably inserted inside the horizontal plate. A transmission plate is fixedly sleeved on the lower end of the drive shaft, and a connecting plate is fixedly sleeved on the upper end of the clamping block. Rotation grooves are opened on the side of the connecting plate and the transmission plate that are close to each other. A first vertical rod and a second vertical rod are fixedly inserted into the two rotation grooves respectively. The walls of the first vertical rod and the second vertical rod are rotatably sleeved with a pull plate.

[0012] The upper end of the drive shaft is provided with a drive self-locking mechanism for driving the drive shaft to rotate.

[0013] Preferably, the self-locking drive mechanism includes a worm gear and a worm. Two symmetrically arranged fixed plates are fixedly provided on the top of the horizontal plate. The worm is rotatably disposed between the two fixed plates. The worm gear is fixedly sleeved with the drive shaft and cooperates with the worm.

[0014] Preferably, the end of the worm gear extends through the fixing plate and is fixedly provided with a crank handle.

[0015] Preferably, the switching hoisting mechanism includes a positioning rod, which slides through the interior of the rotating plate and the outer wall of the bottom ring. Two symmetrically arranged positioning slots are opened on both sides of the rotating rod. The end of the positioning rod is inserted into the positioning slot. A positioning spring is sleeved on the rod wall of the positioning rod. The two ends of the positioning spring are fixedly connected to the positioning rod and the rotating plate, respectively.

[0016] Preferably, the positioning rod is an L-shaped rod.

[0017] Preferably, the support plate has a guide hole inside, the upper end of the card block is fixedly provided with a guide plate, the guide plate is slidably disposed in the guide hole, and a guide spring is fixedly provided between the guide plate and the inner wall of the guide hole.

[0018] Preferably, the interior of the horizontal plate has multiple strip-shaped holes that slide in conjunction with the connecting rod.

[0019] Preferably, the pull plate is rotatably connected to the first vertical rod and the second vertical rod via bearings.

[0020] A method for auxiliary installation of manholes for steel box girders, the specific steps of which are as follows:

[0021] S1: Connect the hook to the external hoisting equipment so that the bottom ring and the swivel are on the same vertical line, and then determine the shape of the manhole to be hoisted;

[0022] S2: When there are no hanging ears inside the manhole, the bottom ring can be moved to the upper outer side of the manhole, and multiple locking blocks can be located on the outer side of the manhole. Then, the multiple locking blocks move laterally under the support of the support plate and lock onto the lower end of the manhole cover plate to quickly clamp the manhole. With the help of external hoisting equipment, the manhole can be clamped and hoisted.

[0023] S3: When the manhole is equipped with a lug, the rotating ring can be rotated inside the bottom ring under the support of the rotating rod, so that the locking block rotates to the top. At this time, multiple hooks fall down and are located on the outside of the manhole. Then the hooks can be connected to the lug inside the manhole, and the manhole can be stably hoisted when the hoisting equipment is started.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the present invention provides an auxiliary installation device and method for manholes in steel box girders, which has the following beneficial effects:

[0026] 1. The auxiliary installation equipment and method for the manhole of the steel box girder, through the provided bottom ring, rotating rod, rotating ring, horizontal plate, support plate, clamping block, connecting rod, hook and synchronous clamping mechanism, can quickly switch the use of hook and clamping block according to the specifications of the manhole, improve the overall multi-functionality of the auxiliary installation device, and improve the convenience of manual installation.

[0027] 2. The auxiliary installation equipment and method for the manhole of the steel box girder, through the provided bottom ring, rotating rod, rotating ring and switching hoisting mechanism, can fix the position of the rotating ring after rotation by inserting the positioning rod and the positioning groove at different positions, so as to ensure the stability of the hook or clamp during the hoisting process of the manhole. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the auxiliary installation equipment and installation method for a steel box girder manhole proposed in this invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the internal structure of the transfer ring;

[0030] Figure 3 for Figure 1 Enlarged view of the structure of part A in the middle section;

[0031] Figure 4 for Figure 2 Enlarged view of the structure of part B in the middle section;

[0032] Figure 5 for Figure 1 A three-dimensional structural diagram of the midsole ring and the swivel ring.

[0033] In the diagram: 1. Bottom ring, 2. Lifting ring, 3. Cable, 4. Hook, 5. Rotating rod, 6. Rotating ring, 7. Horizontal plate, 8. Locking block, 9. Support plate, 10. Connecting rod, 11. Hook, 12. Rotating plate, 13. Drive shaft, 14. Transmission plate, 15. Connecting plate, 16. First vertical rod, 17. Second vertical rod, 18. Pull plate, 19. Worm gear, 20. Fixing plate, 21. Handle, 22. Positioning rod, 23. Positioning groove, 24. Positioning spring, 25. Guide plate, 26. Guide spring, 27. Worm gear. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0035] Example 1

[0036] Please see Figure 1-5 A manhole auxiliary installation device for steel box girders includes a bottom ring 1 and lifting rings 2 fixedly mounted on the top of the bottom ring 1. Multiple lifting rings 2 have internal upper ends fixedly fitted with cables 3, and hooks 4 are fixedly mounted on the top of the cables 3. Two symmetrically arranged rotating rods 5 are rotatably passed through the side of the bottom ring 1. A rotating ring 6 is fixedly mounted at one end of the two rotating rods 5. A horizontal plate 7 is fixedly mounted on the inner wall of the rotating ring 6. Multiple symmetrically arranged locking blocks 8 are provided at the lower end of the horizontal plate 7. A support plate 9 slides through the inside of each locking block 8. The support plate 9 is fixedly connected to the inner wall of the rotating ring 6. A synchronous clamping mechanism is provided between the multiple rotating rings 6 for simultaneously driving the multiple locking blocks 8 to clamp laterally. A connecting rod 10 is fixedly mounted on the top of each locking block 8. The end of the connecting rod 10 protrudes from the horizontal plate 7 and is fixedly mounted with a hook 11. Multiple strip-shaped holes are opened inside the horizontal plate 7 to cooperate with the sliding of the connecting rod 10.

[0037] The synchronous clamping mechanism includes a drive shaft 13, which is rotatably inserted inside the horizontal plate 7. A transmission plate 14 is fixedly sleeved on the lower end of the drive shaft 13. A connecting plate 15 is fixedly sleeved on the upper end of the clamping block 8. A rotating groove is opened on the side of the connecting plate 15 and the transmission plate 14 that are close to each other. A first vertical rod 16 and a second vertical rod 17 are fixedly inserted into the two rotating grooves respectively. A pull plate 18 is rotatably sleeved on the walls of the first vertical rod 16 and the second vertical rod 17 together. The pull plate 18 is rotatably engaged with the first vertical rod 16 and the second vertical rod 17 through bearings. A guide hole is opened inside the support plate 9. A guide plate 25 is fixedly inserted through the upper end of the clamping block 8. The guide plate 25 is slidably disposed in the guide hole. A guide spring 26 is fixedly installed between the guide plate 25 and the inner wall of the guide hole.

[0038] The upper end of the drive shaft 13 is provided with a drive self-locking mechanism for driving the drive shaft 13 to rotate. The drive self-locking mechanism includes a worm wheel 27 and a worm 19. Two symmetrically arranged fixed plates 20 are fixedly provided on the top of the horizontal plate 7. The worm 19 is rotatably located between the two fixed plates 20. The worm wheel 27 is fixedly sleeved with the drive shaft 13 and cooperates with the worm 19. The end of the worm 19 passes through the fixed plate 20 and is fixedly provided with a crank handle 21.

[0039] Before auxiliary installation of the manhole is required, the hook 4 can be connected to external lifting equipment such as a crane, allowing the entire device to move longitudinally. Then, the specifications of the manhole to be lifted are determined. If the manhole does not have lifting lugs, the bottom ring 1 below the lifting equipment can be positioned so that multiple locking blocks 8 inside the bottom ring 1 can be placed on the outside of the manhole. Then, the crank handle 21 is pushed, causing the crank handle 21 to drive the worm gear 19 to rotate. Through the self-locking engagement of the worm gear 19 and the worm wheel 27, the drive shaft 13 can rotate stably, allowing the drive... Shaft 13 drives transmission plate 14 to rotate. At this time, transmission plate 14 can pull multiple pull plates 18. Since pull plates 18 are in rotational engagement with the first vertical rod 16 and the second vertical rod 17, connecting plate 15 can drive the clamping block 8 to move laterally under the support of support plate 9 and stretch guide spring 26. Thus, the lower ends of multiple clamping blocks 8 can be clamped and set under the manhole cover, thereby completing the quick clamping of the manhole. Then, contact the hoisting equipment again to lift the top of the steel box beam of the manhole hoisting device and make longitudinal engagement with the installation position to finally complete the installation.

[0040] If there are lugs inside the manhole that need to be hoisted, the rotating ring 5 can be rotated under the support of the rotating rod 5. At this time, the positions of the locking block 8 and the hook 11 are switched, so that the hook 11 falls and is located outside the manhole. The hoisting of the manhole can be completed by connecting the hook 11 with the lug.

[0041] Example 2

[0042] Example 2, based on Example 1, aims to allow the positions of the hook 11 and the locking block 8 to be switched, and as follows: Figure 1 and Figure 3 As shown, a rotating plate 12 is fixedly provided at the end of the rotating rod 5. A switching hoisting mechanism for limiting the position of the rotating ring 6 is provided between the rotating plate 12 and the outer wall of the bottom ring 1. The switching hoisting mechanism includes a positioning rod 22, which is an L-shaped rod. The positioning rod 22 slides through the interior of the rotating plate 12 and the outer wall of the bottom ring 1. Two symmetrically arranged positioning grooves 23 are provided on both sides of the rotating rod 5. The end of the positioning rod 22 is inserted into the positioning groove 23. A positioning spring 24 is sleeved on the rod wall of the positioning rod 22. The two ends of the positioning spring 24 are fixedly connected to the positioning rod 22 and the rotating plate 12, respectively.

[0043] Once the shape of the manhole is determined, and the hook 11 and the locking block 8 need to be switched, the positioning rod 22 is pulled first. Since the positioning rod 22 is an L-shaped rod, it can be easily pulled out from the positioning groove 23 on one side, and the positioning spring 24 is stretched. Then, the rotating rod 5 drives the rotating ring 6 to rotate, so that the setting positions of the hook 11 and the locking block 8 are switched, and the rotating ring 6 continues to rotate to the horizontal position. Then, the positioning rod 22 is released, and the positioning rod 22 can quickly return and insert into the positioning groove 23 on the other side through the elastic force of the positioning spring 24, thereby completing the fixation of the position of the rotating plate 12 and the rotating ring 6.

[0044] Example 3

[0045] Example 3 proposes an auxiliary installation method for manholes in steel box girders based on Examples 1-2. The specific steps are as follows:

[0046] S1: Connect the hook 4 to the external hoisting equipment so that the bottom ring 1 and the swivel ring 6 are on the same vertical line, and then determine the shape of the manhole to be hoisted;

[0047] S2: When there are no hanging ears inside the manhole, the bottom ring 1 can be moved to the upper outer side of the manhole, and multiple locking blocks 8 can be located on the outer side of the manhole. Then, the multiple locking blocks 8 move laterally under the support of the support plate 9 and are locked at the lower end of the manhole cover plate to quickly clamp the manhole. With the help of external hoisting equipment, the manhole can be clamped and hoisted.

[0048] S3: When the manhole is equipped with a lug, the rotating ring 6 can be rotated in the bottom ring 1 under the support of the rotating rod 5, so that the locking block 8 rotates to the top. At this time, multiple hooks 11 fall down and are located on the outside of the manhole. Then the hooks 11 can be connected to the lug inside the manhole, and the manhole can be stably hoisted when the hoisting equipment is started.

[0049] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manhole auxiliary installation device for steel box girders, comprising a bottom ring (1) and a lifting ring (2) fixedly disposed on the top of the bottom ring (1), characterized in that: The upper part of each of the multiple lifting rings (2) is fixedly fitted with a cable (3), and the top of the multiple cables (3) is fixedly fitted with a hook (4). The side of the bottom ring (1) is rotatably fitted with two symmetrically arranged rotating rods (5). The two rotating rods (5) are fixedly fitted with a rotating ring (6) at one end close to each other. The inner wall of the rotating ring (6) is fixedly fitted with a horizontal plate (7). The lower end of the horizontal plate (7) is provided with multiple symmetrically arranged locking blocks (8). The inside of the locking blocks (8) is slidably fitted with a support plate (9). The support plate (9) is fixedly connected to the inner wall of the rotating ring (6). A synchronous clamping mechanism is provided between the multiple rotating rings (6) for simultaneously driving the multiple locking blocks (8) to clamp laterally. Each of the multiple card blocks (8) is fixedly provided with a connecting rod (10) at its top. The end of the connecting rod (10) extends through the horizontal plate (7) and is fixedly provided with a hook (11). A rotating plate (12) is fixedly provided at the end of the rotating rod (5), and a switching hoisting mechanism for limiting the position of the rotating ring (6) is provided between the rotating plate (12) and the outer wall of the bottom ring (1).

2. The auxiliary installation equipment for manholes of steel box girders according to claim 1, characterized in that: The synchronous clamping mechanism includes a drive shaft (13), which is rotatably inserted inside the horizontal plate (7). A transmission plate (14) is fixedly sleeved on the lower end of the drive shaft (13), and a connecting plate (15) is fixedly sleeved on the upper end of the clamping block (8). A rotating groove is opened on the side of the connecting plate (15) and the transmission plate (14) that are close to each other. A first vertical rod (16) and a second vertical rod (17) are fixedly inserted into the two rotating grooves respectively. A pull plate (18) is rotatably sleeved on the walls of the first vertical rod (16) and the second vertical rod (17). The upper end of the drive shaft (13) is provided with a drive self-locking mechanism for driving the drive shaft (13) to rotate.

3. The auxiliary installation equipment for manholes of steel box girders according to claim 2, characterized in that: The self-locking drive mechanism includes a worm wheel (27) and a worm (19). Two symmetrically arranged fixing plates (20) are fixedly provided on the top of the horizontal plate (7). The worm (19) is rotatably disposed between the two fixing plates (20). The worm wheel (27) is fixedly sleeved with the drive shaft (13) and cooperates with the worm (19).

4. The auxiliary installation equipment for manholes of steel box girders according to claim 3, characterized in that: The end of the worm (19) extends through the fixing plate (20) and is fixedly equipped with a crank handle (21).

5. The auxiliary installation equipment for manholes of steel box girders according to claim 1, characterized in that: The switching hoisting mechanism includes a positioning rod (22), which slides through the interior of the rotating plate (12), the outer wall of the bottom ring (1), and two symmetrically arranged positioning grooves (23) on both sides of the rotating rod (5). The end of the positioning rod (22) is inserted into the positioning groove (23), and a positioning spring (24) is sleeved on the rod wall of the positioning rod (22). The two ends of the positioning spring (24) are fixedly connected to the positioning rod (22) and the rotating plate (12) respectively.

6. The auxiliary installation equipment for manholes of steel box girders according to claim 5, characterized in that: The positioning rod (22) is an L-shaped rod.

7. The auxiliary installation equipment for manholes of steel box girders according to claim 1, characterized in that: The support plate (9) has a guide hole inside, and the upper end of the card block (8) is fixedly provided with a guide plate (25). The guide plate (25) is slidably disposed in the guide hole, and a guide spring (26) is fixedly provided between the guide plate (25) and the inner wall of the guide hole.

8. The auxiliary installation equipment for manholes of steel box girders according to claim 1, characterized in that: The interior of the horizontal plate (7) has multiple strip-shaped holes that slide with the connecting rod (10).

9. The auxiliary installation equipment for manholes of steel box girders according to claim 2, characterized in that: The pull plate (18) is rotated with the first vertical rod (16) and the second vertical rod (17) through bearings.

10. A method for auxiliary installation of manholes in steel box girders, characterized in that: Including the auxiliary installation equipment for manholes of steel box girders based on any one of claims 1-8, the specific steps are as follows: S1: Connect the hook (4) to the external hoisting equipment so that the bottom ring (1) and the swivel (6) are on the same vertical line, and then determine the shape of the manhole to be hoisted; S2: When there are no hanging ears inside the manhole, the bottom ring (1) can be moved to the upper outer side of the manhole, and multiple locking blocks (8) can be located on the outer side of the manhole. Then, the multiple locking blocks (8) move laterally under the support of the support plate (9) and are locked at the lower end of the manhole cover plate to quickly clamp the manhole. The manhole can be clamped and lifted with the help of external lifting equipment. S3: When the manhole is equipped with a hanging lug, the rotating ring (6) can be rotated in the bottom ring (1) under the support of the rotating rod (5), so that the locking block (8) rotates to the top. At this time, multiple hooks (11) fall down and are located on the outside of the manhole. Then the hooks (11) can be connected to the hanging lug inside the manhole, and the manhole can be stably hoisted when the hoisting equipment is started.

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