A hoisting and clamping device suitable for connecting and securing large-diameter precast concrete pipe culverts

Abstract

This utility model discloses a hoisting and clamping device suitable for large-diameter precast concrete pipe culverts, belonging to the field of precast concrete pipe construction technology. It includes a precast concrete pipe to be installed; a hoisting and clamping assembly; a vertical connecting top pressure plate hinged to a horizontal beam, with one end of the vertical connecting top pressure plate away from the horizontal beam pressing down against the outer wall of the precast concrete pipe to be installed; an inclined support bottom pressure plate hinged to an upper pressure toothed plate, the free end of the inclined support bottom pressure plate having a lower pressure foot end, which presses down against the outer wall of the other end of the precast concrete pipe to be installed; a first locking assembly dynamically connects the horizontal beam and the vertical connecting top pressure plate together; a second locking assembly dynamically connects the upper pressure toothed plate and the inclined support bottom pressure plate together. This utility model forms symmetrical force points, and the entire assembly not only serves as a hoisting force point but also has good clamping ability, preventing the pipe from slipping or shifting during hoisting.

Description

Technical Field

[0001] This utility model belongs to the field of precast concrete pipe construction technology, and in particular, it is a device for connecting, fixing and hoisting large-diameter precast concrete pipe culverts. Background Technology

[0002] Precast concrete pipes, also known as precast concrete components, are concrete pipes manufactured in factories or on-site. They possess advantages such as good structural performance, convenient construction, time savings, and cost-effectiveness, playing a vital role in construction projects. Due to their superior performance, short construction cycle, reliable quality, and environmental friendliness, precast concrete pipes are widely used in various fields, including building drainage and sewage engineering, water supply pipeline engineering, municipal stormwater and sewage engineering, and urban underground pipe gallery engineering, making them an indispensable material in modern engineering construction.

[0003] Precast concrete pipes are typically manufactured in centralized, standardized, and fixed-length factories. After curing to the required strength, they are hoisted and joined together in sections. The diameter and wall thickness of precast pipes vary depending on their intended use, with common diameters ranging from 0.5m to 4m, wall thicknesses from 5cm to 20cm, and lengths from 2m to 4m. Currently, precast concrete pipes are mainly installed using a segmented, clamped-joint process along the pipeline. Common methods for hoisting and clamping the joints include binding and pre-drilled holes. The binding method uses two sets of steel wire ropes bound along the pipe before hoisting and joining, and the steel wire ropes are removed after joining. The pre-drilled-hole method involves pre-setting two sets of four pre-drilled holes along the pipe before hoisting and joining, using two sets of steel wire ropes through the pre-drilled holes to secure the pipe inside, and then removing the internal clamps after hoisting.

[0004] The binding method and the pre-drilled hole method have the following main problems: (1) For short-sized precast pipes, the binding method is prone to the wire rope falling off because the precast pipe body is often smooth, resulting in a high risk of hoisting safety. At the same time, after the pipe body is hoisted and connected, the wire rope is easily pressed down by the pipe body and is not easy to remove, which affects the hoisting efficiency. (2) For the pre-drilled hole method, the wire rope must be inserted through the pre-drilled hole before hoisting. The precast pipe must be accurately positioned to ensure that the pre-drilled hole is facing upwards. The storage requirements are high, making it difficult to accurately position the pipe body in actual implementation. It is often necessary to assist in the hoisting to position the pipe body in advance. At the same time, the pre-drilled hole must be reinforced after the precast pipe is installed, which increases the number of pipe-related operations and the difficulty.

[0005] In view of the problems existing in the segmented butt binding method and the pre-reserved lifting hole method for large-diameter precast concrete pipes, in order to further facilitate the processing and storage management of large-diameter precast concrete pipes, facilitate segmented hoisting and clamping, and reduce unnecessary auxiliary hoisting and reinforcement work, this solution proposes a clamping and hoisting device to improve the efficiency of precast concrete pipe butt clamping and hoisting and reduce construction costs. Utility Model Content

[0006] The purpose of this invention is to provide a hoisting and clamping device suitable for connecting and securing large-diameter precast concrete pipe culverts, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides a hoisting and clamping device suitable for connecting and securing large-diameter precast concrete pipe culverts. This utility model is implemented on precast concrete pipes to be installed, and the installed pipe sections are hoisted and clamped.

[0008] This utility model provides a hoisting and clamping device suitable for the butt joint of large-diameter precast concrete pipe culverts, comprising:

[0009] beam;

[0010] An L-shaped lower load-bearing toothed plate is fixed to one end of the crossbeam. The lifting cantilever of the lower load-bearing toothed plate is used to insert into the inner cavity of one end of the precast concrete pipe to be installed.

[0011] The L-shaped upper pressure toothed plate is fixed to the other end of the crossbeam. The cantilever of the L-shaped upper pressure toothed plate faces one end of the crossbeam, and the horizontal position of the cantilever of the upper pressure toothed plate is higher than the hoisting cantilever.

[0012] The top of the vertically connected top pressure plate is hinged to the middle section of the crossbeam, and the middle section is detachably connected to the cantilever of the L-shaped upper pressure toothed plate; the lower end of the vertically connected top pressure plate is used to press down against the outer wall of the precast concrete pipe to be installed.

[0013] The hoisting ropes are respectively connected to the top of the lower load-bearing toothed plate and the upper pressure toothed plate.

[0014] Preferably, the lower load-bearing toothed plate and the upper pressure toothed plate are arranged opposite to each other, and the lifting cantilever is set at the bottom end of the lower load-bearing toothed plate. The lifting cantilever is inserted into the precast concrete pipe to be installed and pulled up by the lifting rope, so that the lifting cantilever is close to the inner wall of the precast concrete pipe to be installed.

[0015] Preferably, the top end of the vertical connecting top pressure plate is hinged to the crossbeam via a first hinge pin, and the end of the vertical connecting top pressure plate away from the crossbeam is the top pressure end.

[0016] Preferredly, when the top pressure end presses down on the precast concrete pipe to be installed, the vertical connecting top pressure plate is fixedly connected to the bottom end of the upper pressure tooth plate by the first locking bolt, so that the vertical connecting top pressure plate maintains a vertical relationship with the outer wall of the precast concrete pipe to be installed or the installed pipe section.

[0017] Priority also includes:

[0018] The inclined support foot pressure plate is hinged to the upper pressure tooth plate. The free end of the inclined support foot pressure plate has a lower pressure foot end, which is used to press down on the outer wall of the other end of the precast concrete pipe to be installed.

[0019] The first locking assembly dynamically connects the horizontal beam and the vertical connecting top pressure plate together;

[0020] The second locking assembly dynamically connects the upper pressure plate and the inclined support foot pressure plate together.

[0021] Preferred, the inclined support foot pressure plate is hinged to the upper pressure tooth plate via a second hinge pin, and the end of the lower pressure foot is integrally connected to the inclined support foot pressure plate; when the inclined support foot pressure plate is lowered, it swings in an arc around the second hinge pin, causing the end of the lower pressure foot to press down on the outer wall of the other end of the precast concrete pipe to be installed or the already installed pipe section.

[0022] Preferredly, when the lower pressure foot end presses down on the precast concrete pipe to be installed, the upper part of the inclined support foot pressure plate is fixedly connected to the corner of the upper pressure tooth plate by the second locking bolt, so that the inclined support foot pressure plate maintains the relationship of the lower pressure foot end pressing down on the outer wall of the precast concrete pipe to be installed.

[0023] Preferably, the top of the inclined support foot pressure plate has a hinged end, through which the second hinge pin passes and is rotatably connected to the upper pressure weight tooth plate.

[0024] Preferably, the first locking assembly includes a first U-shaped locking rod that passes through and connects the vertical connecting top pressure plate and the crossbeam when the vertical connecting top pressure plate rotates away from the upper pressure toothed plate and flips up, and a first locking nut that is threaded to one end of the first U-shaped locking rod.

[0025] Preferably, the second locking assembly includes a second U-shaped locking rod that passes through and connects the inclined support foot pressure plate and the upper pressure toothed plate when the inclined support foot pressure plate rotates away from the upper pressure toothed plate and flips up, and a second locking nut that is threaded to one end of the second U-shaped locking rod.

[0026] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0027] This device is applicable to the hoisting and clamping of large-diameter precast concrete pipe culverts. The lower load-bearing toothed plate of the hoisting and clamping assembly is inserted into the inner cavity of the precast concrete pipe to be installed, and a crossbeam is fixedly connected to it. An upper pressure toothed plate is installed at the far end of the crossbeam, and a hoisting rope connects the two. Compared with the existing technology, the lower load-bearing toothed plate is inserted into the pipe body and pulled upward, so that the hoisting cantilever is close to the inner wall of the pipe body, providing reliable internal support. The upper pressure toothed plate cooperates with it through the hoisting rope to form a symmetrical force point. The entire assembly not only serves as a hoisting force point, but also has good clamping ability to prevent the pipe body from slipping or shifting during hoisting.

[0028] The top of the vertical connecting top pressure plate is hinged to the crossbeam via the first hinge pin. The end furthest from the hinge is the top pressure end, which can swing naturally around the hinge point and press against the outer wall of the pipe. Compared with the existing technology, the top pressure end automatically presses down due to gravity without the need for additional power. The top pressure end corresponds to the position of the hoisting cantilever, forming an inner and outer clamping structure to enhance the fixing effect. The first locking bolt further fixes the vertical connecting top pressure plate and the upper pressure toothed plate to prevent them from shifting and improve the overall rigidity and stability.

[0029] The inclined support foot pressure plate provides effective downward support at the other end. The inclined support foot pressure plate is hinged to the upper pressure tooth plate, and its free end is the end of the lower pressure foot. When released, it automatically swings down to press against the outer wall of the other end of the pipe body. Compared with the existing technology, it forms a double-end downward pressure structure. Together with the vertical connecting top pressure plate, it forms a three-sided clamping system, which significantly enhances the overall balance during hoisting and prevents tilting caused by uneven force on one side. The connection is strengthened by the second locking bolt to prevent the end of the lower pressure foot from loosening and falling off.

[0030] The first locking assembly is used to lock the vertically connected top pressure plate, and the second locking assembly is used to lock the inclined support bottom pressure plate. Both adopt a U-shaped locking rod + locking nut structure. Compared with the existing technology, when not hoisted, it prevents the top pressure plate and the bottom pressure plate from shaking or falling due to their own weight, ensuring on-site safety. They can be quickly disassembled and assembled without affecting the normal hoisting process, reducing the risk of accidental collisions and malfunctions, and improving the safety factor of the construction environment. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure for hoisting a single precast pipe according to this utility model;

[0034] Figure 3 This is a schematic diagram of the vertical connection top pressure plate in the closed and pressed-down state during pipeline installation according to this utility model;

[0035] Figure 4 This is a schematic diagram of the vertical connection top pressure plate of the present invention in the flipped-open state after pipe installation;

[0036] Figure 5 This is a schematic diagram of the connection structure of the first locking assembly of this utility model;

[0037] Figure 6 This is a schematic diagram of the connection structure of the second locking assembly of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] In the diagram: 1. Precast concrete pipe to be installed; 2. Connecting and securing assembly; 3. Lower load-bearing toothed plate; 4. Crossbeam; 5. Upper pressure toothed plate; 6. Lifting rope; 7. Vertical connecting top pressure plate; 8. Inclined support foot pressure plate; 9. First locking assembly; 10. Second locking assembly; 11. Lower pressure foot end; 12. First locking bolt; 13. Second locking bolt; 14. Installed pipe section; 15. Hinged end; 16. Lifting cantilever; 17. Top pressure end; 18. First hinge pin; 19. First U-shaped locking rod; 20. First locking nut; 21. Second hinge pin; 22. Second U-shaped locking rod; 23. Second locking nut. Detailed Implementation

[0040] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0041] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0042] This embodiment provides, for example Figures 1 to 6 The device shown is suitable for the hoisting and clamping of large-diameter precast concrete pipe culverts, including: a precast concrete pipe to be installed 1, a docking and clamping assembly 2, a vertical connecting top pressure plate 7, an inclined support bottom pressure plate 8, a first locking assembly 9, and a second locking assembly 10.

[0043] The precast concrete pipe 1 to be installed is hoisted and secured to the installed pipe section 14;

[0044] The docking fastening assembly 2 is fastened to one end of the precast concrete pipe 1 to be installed, and the docking fastening assembly 2 includes a lower load-bearing toothed plate 3 inserted into the inner cavity of one end of the precast concrete pipe 1 to be installed and closely attached to the inner wall of the precast concrete pipe 1 to be installed; the top end of the lower load-bearing toothed plate 3 is fixedly connected to one end of the crossbeam 4; and an upper pressure toothed plate 5 is fixedly installed at the other end of the crossbeam 4 (the end away from the lower load-bearing toothed plate 3).

[0045] The top ends of the lower supporting toothed plate 3 and the upper pressure toothed plate 5 extend from the crossbeam (above the crossbeam), and the hoisting rope 6 is connected to the top ends of the lower supporting toothed plate 3 and the upper pressure toothed plate 5 respectively.

[0046] The top of the vertically connected top pressure plate 7 is hinged at the middle section of the crossbeam 4, and rotates in an arc-shaped trajectory with the hinge end as the center, so that its lower end presses down against the outer wall of the precast concrete pipe 1 to be installed, thereby locking the precast concrete pipe 1 to be installed.

[0047] The inclined support foot pressure plate 8 is hinged to the upper pressure tooth plate 5, and the free end of the inclined support foot pressure plate 8 has a lower pressure foot end 11, which presses down on the outer wall of the other end of the precast concrete pipe 1 to be installed; so that the vertical connecting top pressure plate 7 and the lower pressure foot end 11 press down on the outer walls of both ends of the precast concrete pipe 1 to be installed, thereby increasing the stability of the precast concrete pipe 1 to be installed during hoisting and preventing it from tilting due to uneven weight during hoisting.

[0048] The first locking assembly 9 dynamically connects the horizontal beam 4 and the vertical connecting top pressure plate 7 together, preventing the vertical connecting top pressure plate 7 from falling and shaking when it is moved away and not pressed down to install the precast concrete pipe 1.

[0049] The second locking assembly 10 dynamically connects the upper pressure toothed plate 5 and the inclined support foot pressure plate 8 together to prevent the inclined support foot pressure plate 8 from falling and shaking when it is moved away and not pressed down to install the precast concrete pipe 1.

[0050] In this embodiment, the lower supporting toothed plate 3 and the upper pressure toothed plate 5 are arranged opposite to each other. The lower supporting toothed plate 3 is L-shaped, with a lifting cantilever 16 at its bottom end and a longitudinally arranged hanging column integrated with the lifting cantilever 16 at its upper end. The hanging column is used to fix it to the crossbeam. The lifting cantilever 16 is inserted into the precast concrete pipe 1 to be installed and pulled upward by the lifting rope 6, so that the lifting cantilever 16 is in close contact with the inner wall of the precast concrete pipe 1 to be installed. The upper pressure toothed plate 5 is also L-shaped, with its cantilever facing one end of the crossbeam, and the horizontal position of the cantilever of the upper pressure toothed plate is higher than that of the lifting cantilever 16. The height difference gap between them is used to insert the pipe wall of the precast concrete pipe 1 to be installed. The upper end of the upper pressure toothed plate 5 is also a longitudinally arranged hanging column, used to fix it to the crossbeam. The hanging column and cantilever of the upper pressure toothed plate are also integrated.

[0051] In this embodiment, the top end of the vertical connecting top pressure plate 7 is hinged to the crossbeam 4 via the first hinge pin 18, and the end of the vertical connecting top pressure plate 7 away from the crossbeam 4 is the top pressure end 17. When the vertical connecting top pressure plate 7 is lowered, the vertical connecting top pressure plate 7 swings around the first hinge pin 18 as the center, so that the top pressure end 17 is perpendicular to the precast concrete pipe 1 to be installed due to its own weight, so that the top pressure end 17 presses down and abuts against the outer wall of the precast concrete pipe 1 to be installed and is located directly above the hoisting cantilever 16, thereby achieving the locking of one end of the precast concrete pipe 1 to be installed.

[0052] In this embodiment, the inclined support foot pressure plate 8 is hinged to the upper pressure tooth plate 5 via the second hinge pin 21, and the lower pressure foot end 11 is integrally connected to the inclined support foot pressure plate 8. When the inclined support foot pressure plate 8 is lowered, it swings in an arc around the second hinge pin 21, causing the lower pressure foot end 11 to press down on the outer wall of the other end of the precast concrete pipe 1 to be installed or the already installed pipe section 14.

[0053] In this embodiment, when the top pressure end 17 presses down on the precast concrete pipe 1 to be installed, the vertical connecting top pressure plate 7 is fixedly connected to the bottom end of the upper pressure counterweight plate 5 by the first locking bolt 12, so that the vertical connecting top pressure plate 7 maintains a vertical relationship with the outer wall of the precast concrete pipe 1 to be installed or the already installed pipe section 14. This improves the stability of the vertical connecting top pressure plate 7 and prevents the vertical connecting top pressure plate 7 from shifting or misaligning.

[0054] In this embodiment, when the lower pressure foot end 11 presses down on the precast concrete pipe 1 to be installed, the upper part of the inclined support lower pressure plate 8 is fixedly connected to the corner of the upper pressure counterweight plate 5 by the second locking bolt 13, so that the inclined support lower pressure plate 8 maintains the relationship of the lower pressure foot end 11 pressing down on the outer wall of the precast concrete pipe 1 to be installed. This improves the stability of the inclined support lower pressure plate 8.

[0055] In this embodiment, the top of the inclined support foot pressure plate 8 has a hinge end 15, and the second hinge pin 21 passes through the hinge end 15 and is rotatably connected to the upper pressure weight plate 5.

[0056] In this embodiment, the first locking assembly 9 includes a first U-shaped locking rod 19 that passes through and connects the vertical connecting top pressure plate 7 and the crossbeam 4 when the vertical connecting top pressure plate 7 rotates away from the upper pressure toothed plate 5 and flips up, and a first locking nut 20 threadedly connected to one end of the first U-shaped locking rod 19. After the vertical connecting top pressure plate 7 flips up, to prevent it from falling and swaying, the first U-shaped locking rod 19 is held and inserted into the vertical connecting top pressure plate 7 and the crossbeam 4. Finally, the first locking nut 20 is tightened to lock the first U-shaped locking rod 19, preventing it from falling off and preventing the vertical connecting top pressure plate 7 from falling and swaying due to its own weight, thus affecting construction. When a locking operation is required, the first U-shaped locking rod 19 is removed again, allowing the vertical connecting top pressure plate 7 to swing down due to its own weight.

[0057] In this embodiment, the second locking assembly 10 includes a second U-shaped locking rod 22 that passes through and connects the inclined support foot pressure plate 8 and the upper pressure toothed plate 5 when the inclined support foot pressure plate 8 rotates and disengages from the upper pressure toothed plate 5 and flips over, and a second locking nut 23 threadedly connected to one end of the second U-shaped locking rod 22. To prevent the inclined support foot pressure plate 8 from falling and swaying after flipping over, the second U-shaped locking rod 22 is held in place and inserted into the inclined support foot pressure plate 8 and the upper pressure toothed plate 5. Finally, the second U-shaped locking rod 22 is locked by tightening the second locking nut 23, preventing it from falling off and thus preventing the inclined support foot pressure plate 8 from falling and swaying due to its own weight, which would affect construction. When a locking operation is required, the second U-shaped locking rod 22 is removed again, allowing the inclined support foot pressure plate 8 to swing down due to its own weight.

[0058] In this embodiment, when the lifting cantilever 16 is close to the inner wall of the precast concrete pipe 1 to be installed, and the top pressure end 17 is pressed down on one end of the outer wall of the precast concrete pipe 1 to be installed, and the bottom pressure foot end 11 is pressed down on the other end of the outer wall of the precast concrete pipe 1 to be installed, so that the top pressure end 17 and the bottom pressure foot end 11 are pressed down at both ends to prevent the precast concrete pipe 1 to be installed from shaking, the top end of the lifting rope 6 is lifted up by external lifting machinery such as a crane, and the precast concrete pipe 1 to be installed is clamped together with the installed pipe section 14 to achieve the lifting clamping cooperation. After the clamping is completed, the docking clamping component 2 is disassembled, and the next set of precast concrete pipes 1 to be installed is clamped and the process is executed in sequence.

[0059] Working principle

[0060] This device is applicable to the hoisting and clamping of large-diameter precast concrete pipe culverts. The precast concrete pipe 1 to be installed is transported to the construction site. The lower load-bearing toothed plate 3 is inserted into the inner cavity of one end of the precast concrete pipe 1 to be installed. The bottom end of the lower load-bearing toothed plate 3 is equipped with a hoisting cantilever 16. The hoisting rope 6 is used to pull it upward and tighten it to fit tightly against the inner wall of the precast concrete pipe 1 to be installed. A crossbeam 4 is fixedly connected to the top of the lower load-bearing toothed plate 3. Furthermore, an upper counterweight toothed plate 5 is installed at the end away from the lower load-bearing toothed plate 3. The hoisting rope 6 is connected to the top of the lower load-bearing toothed plate 3 and the top of the upper counterweight toothed plate 5 respectively, serving as the lifting force point of the entire device.

[0061] The vertical connecting top pressure plate 7 is hinged to the crossbeam 4 via the first hinge pin 18. When the vertical connecting top pressure plate 7 is lowered, its top end swings downward around the first hinge pin 18, making the top pressure end 17 perpendicular to the outer wall of the precast concrete pipe 1 to be installed. The top pressure end 17 presses down on the outer wall of the precast concrete pipe 1 to be installed, located directly above the hoisting cantilever 16, forming a double-sided clamping and fixing of one end of the pipe body. The vertical connecting top pressure plate 7 is connected to the upper pressure toothed plate by the first locking bolt 12. 5. To enhance its stability, the inclined support foot pressure plate 8 is hinged to the upper pressure tooth plate 5 through the second hinge pin 21. The free end of the inclined support foot pressure plate 8 is the lower pressure foot end 11. When the plate is lowered, it swings downward with the second hinge pin 21 as the center, so that the lower pressure foot end 11 presses on the outer wall of the other end of the precast concrete pipe 1 to be installed. The inclined support foot pressure plate 8 and the upper pressure tooth plate 5 are fixed by the second locking bolt 13 to ensure that the lower pressure foot end 11 is continuously pressed.

[0062] When the vertical connecting top pressure plate 7 is not in use, flip it over and lift it up. Use the first handheld U-shaped locking rod 19 to pass through the vertical connecting top pressure plate 7 and the crossbeam 4, and lock it with the first locking nut 20 to prevent the vertical connecting top pressure plate 7 from falling and swaying due to its own weight, ensuring the safety of the operator. When the inclined support foot pressure plate 8 is not in use, flip it over and lift it up in the same way. Use the second handheld U-shaped locking rod 22 to pass through the inclined support foot pressure plate 8 and the upper pressure counterweight plate 5, and lock it with the second locking nut 23 to prevent the inclined support foot pressure plate 8 from falling and swaying, avoiding affecting other operations.

[0063] External hoisting equipment, such as a crane, lifts the entire docking clamping assembly 2 using hoisting rope 6. The precast concrete pipe 1 to be installed forms a stable three-point force-bearing structure due to the internal support of the lower load-bearing toothed plate 3 and the external pressure of the top end 17 and the lower pressure foot end 11, ensuring that there will be no deviation or tilting during the hoisting process. After hoisting, the operator guides the precast concrete pipe 1 to be installed close to the installed pipe section 14. After precise alignment, it is slowly lowered to complete the docking of the precast concrete pipe 1 to be installed with the installed pipe section 14. After docking, the docking clamping assembly 2 is removed to facilitate the hoisting of the next pipe section.

[0064] When disassembly and reuse are required, the locking structure is released, the first locking bolt 12 and the second locking bolt 13 are loosened, the first U-shaped locking rod 19 and the second U-shaped locking rod 22 and their corresponding locking nuts are removed, and the vertical connecting top pressure plate 7 and the inclined support bottom pressure plate 8 are reset and folded for easy transportation and storage. The entire set of equipment can be reused for the hoisting of the next section of precast concrete pipe 1 to be installed. All structures can be quickly assembled and disassembled to meet the needs of continuous construction under different working conditions.

[0065] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are 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 limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hoisting and clamping device suitable for the butt joint of large-diameter precast concrete pipe culverts, characterized in that, include: beam; The L-shaped lower load-bearing toothed plate (3) is fixed to one end of the crossbeam. The lifting cantilever (16) of the lower load-bearing toothed plate is used to insert into the inner cavity of one end of the precast concrete pipe (1) to be installed. The L-shaped upper pressure tooth plate (5) is fixed to the other end of the crossbeam (4). The cantilever of the L-shaped upper pressure tooth plate (5) faces one end of the crossbeam, and the horizontal position of the cantilever of the upper pressure tooth plate is higher than the hoisting cantilever (16). The top plate (7) is vertically connected, with its top end hinged to the middle section of the crossbeam. Its middle section is detachably connected to the cantilever of the upper pressure toothed plate, and its lower end is used to press down against the outer wall of the precast concrete pipe (1) to be installed. Lifting ropes (6) are respectively connected to the top of the lower load-bearing toothed plate (3) and the upper pressure toothed plate (5).

2. The hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 1, characterized in that: The lower load-bearing toothed plate (3) and the upper pressure toothed plate (5) are arranged opposite to each other. The lifting cantilever (16) is set at the bottom end of the lower load-bearing toothed plate (3). The lifting cantilever (16) is inserted into the precast concrete pipe (1) to be installed and pulled up by the lifting rope (6) so that the lifting cantilever (16) is close to the inner wall of the precast concrete pipe (1) to be installed.

3. The hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 1, characterized in that: The top end of the vertical connecting top pressure plate (7) is hinged to the crossbeam (4) through the first hinge pin (18), and the end of the vertical connecting top pressure plate (7) away from the crossbeam (4) is the top pressure end (17).

4. The hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 3, characterized in that: When the top pressure end (17) presses down on the precast concrete pipe (1) to be installed, the vertical connecting top pressure plate (7) is fixedly connected to the bottom end of the upper pressure toothed plate (5) by the first locking bolt (12), so that the vertical connecting top pressure plate (7) maintains a relationship that is perpendicular to the longitudinal direction of the precast concrete pipe (1) to be installed or the outer wall of the installed pipe section (14).

5. A hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 1, characterized in that, Also includes: The inclined support foot pressure plate (8) is hinged to the upper pressure tooth plate (5). The free end of the inclined support foot pressure plate (8) has a lower pressure foot end (11), which is used to press down on the outer wall of the other end of the precast concrete pipe (1) to be installed. The first locking assembly (9) dynamically connects the crossbeam (4) and the vertical connecting top pressure plate (7) together; The second locking assembly (10) dynamically connects the upper pressure plate (5) and the inclined support foot pressure plate (8) together.

6. The hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 5, characterized in that: The inclined support foot pressure plate (8) is hinged to the upper pressure tooth plate (5) through the second hinge pin (21), and the lower pressure foot end (11) is integrally connected to the inclined support foot pressure plate (8). When the inclined support foot pressure plate (8) is lowered, the inclined support foot pressure plate (8) swings in an arc with the second hinge pin (21) as the center, so that the lower pressure foot end (11) presses down on the outer wall of the other end of the precast concrete pipe (1) to be installed or the installed pipe section (14).

7. A hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 5, characterized in that: When the lower pressure foot end (11) presses down on the precast concrete pipe (1) to be installed, the upper part of the inclined support foot pressure plate (8) is fixedly connected to the corner of the upper pressure tooth plate (5) by the second locking bolt (13), so that the inclined support foot pressure plate (8) maintains the relationship of the lower pressure foot end (11) pressing down on the outer wall of the precast concrete pipe (1) to be installed.

8. A hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 6, characterized in that: The top of the inclined support foot pressure plate (8) has a hinge end (15), through which the second hinge pin (21) passes and is rotatably connected to the upper pressure weight tooth plate (5).

9. A hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 5, characterized in that: The first locking assembly (9) includes a first U-shaped locking rod (19) that passes through and connects the vertical connecting top pressure plate (7) and the crossbeam (4) when the vertical connecting top pressure plate (7) rotates away from the upper pressure tooth plate (5) and flips up, and a first locking nut (20) that is threaded to one end of the first U-shaped locking rod (19).

10. A hoisting and clamping device for connecting large-diameter precast concrete pipe culverts according to claim 5, characterized in that: The second locking assembly (10) includes a second U-shaped locking rod (22) that passes through and connects the inclined support foot pressure plate (8) and the upper pressure tooth plate (5) when the inclined support foot pressure plate (8) rotates away from the upper pressure tooth plate (5) and flips up, and a second locking nut (23) that is threaded to one end of the second U-shaped locking rod (22).

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