Drainage pipeline hoisting equipment and method

Abstract

The invention relates to the technical field of municipal construction equipment, and discloses drainage pipeline lifting equipment which comprises a lifting appliance body, the lifting appliance body is in a U shape and comprises an upper bearing arm and a lower bearing arm, a fixing frame is arranged on the upper bearing arm, a first driving part and a second driving part are sequentially arranged in the upper bearing arm, and a pressing rod is slidably arranged on the upper bearing arm; the first driving part comprises a rotating gear rotationally arranged in the upper bearing arm through a gear shaft, the rotating gear rotates in a reciprocating mode to drive the pressing rod to slide downwards so as to press the culvert pipe, a lifting ring is arranged on the second driving part, and the second driving part drives the rotating gear to rotate after the lifting ring bears the load. The invention provides the drainage pipeline hoisting equipment capable of autonomously limiting the drainage pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal construction equipment, and particularly to a drainage pipe hoisting device and method. Background Art

[0002] Drainage pipes usually refer to culverts, that is, pipes buried below the ground surface, made of reinforced concrete casting, commonly known as cement pipes, and small culverts are also made of metal materials. Culverts are used as diversion pipes under the all-round cofferdam dam, and are generally used as water conveyance pipes. Most of the municipal road drainage pipes in our country use cement pipes as culverts. When burying culverts, a hoisting device is required to transfer them to a pre-dug pit. In the prior art, the invention patent with the patent publication number CN113023554A discloses a culvert hoisting tool, including: a sling body; the sling body is of a U-shaped structure; the sling body has a first side arm and a second side arm; an adjusting member rotatably arranged on the first side arm; a supporting member fixedly arranged on the second side arm; a pressing member connected to the adjusting member for cooperating with the supporting member to fix the culvert located between the first side arm and the second side arm; an adjustable lifting point slidably arranged on the first side arm for connecting with an external hoisting device. Although the above patent can press and limit the culvert during use, during the operation, it is necessary to manually rotate the pressing member to press and limit, and the operation steps are cumbersome, which not only increases the labor intensity of workers, but also has a low installation efficiency. Summary of the Invention

[0003] The present invention aims to provide a drainage pipe hoisting device and method to provide a drainage pipe hoisting device that can automatically limit the drainage pipe.

[0004] To achieve the above object, the present invention adopts the following technical scheme: A drainage pipe hoisting device includes a sling body. The sling body is U-shaped and includes an upper load-bearing arm and a lower load-bearing arm. A fixed frame is provided on the upper load-bearing arm. A first driving part and a second driving part are sequentially arranged in the upper load-bearing arm. A pressing rod is slidably arranged on the upper load-bearing arm. The first driving part includes a rotating gear rotatably arranged in the upper load-bearing arm through a gear shaft. The reciprocating rotation of the rotating gear can drive the pressing rod to slide downward to press the culvert. A lifting ring is provided on the second driving part. After the lifting ring bears the load, the second driving part drives the rotating gear to rotate.

[0005] The beneficial effects of this solution are as follows:

[0006] In the drainage pipe hoisting equipment of this technical solution, the main body of the lifting tool includes an upper load-bearing arm and a lower load-bearing arm. When installing a culvert pipe, the lower load-bearing arm of the main body of the lifting tool penetrates into the central cavity of the culvert pipe, and the hook of the hoisting equipment hangs on the lifting ring. The hook is lifted upward to drive the main body of the lifting tool and the culvert pipe to move upward. When the lifting ring bears the weight, the second driving part drives the rotating gear to rotate. When the rotating gear rotates, it drives the pressing rod to slide along the upper load-bearing arm. When the pressing rod slides downward, the lower part of the pressing rod can abut against the culvert pipe, restricting the movement of the culvert pipe to form a clamping force and pressing and fixing the culvert pipe. It can effectively prevent the culvert pipe from accidentally slipping out of the lifting tool during hoisting and transportation due to shaking or collision, reduce the risk of pipeline damage and secondary construction, and protect the safety of construction personnel and equipment. Through the above settings, this technical solution realizes automatic limiting and pressing to ensure that the culvert pipe is firmly fixed immediately after being positioned, avoiding the cumbersome operations of manual pulling or auxiliary supports, making the hoisting process more stable and controllable, thereby improving the overall construction safety and installation accuracy.

[0007] Preferably, as an improvement, teeth meshing with the rotating gear are provided on the side of the pressing rod, and the gear shaft is rotatably arranged in the upper load-bearing arm.

[0008] The beneficial effect is that by providing teeth on the side of the pressing rod, when the second driving part drives the rotating gear to rotate, through the meshing of the rotating gear and the teeth on the side of the pressing rod, the pressing rod can be driven to slide downward for clamping.

[0009] Preferably, as an improvement, the second driving part includes a movable frame and a bottom plate. The lifting ring is installed on the movable frame, the movable frame is slidably installed on the fixed frame, a cavity is provided in the upper load-bearing arm, the bottom plate is slidably arranged in the cavity, both sides of the movable frame penetrate into the cavity and are fixedly connected to the bottom plate, an elastic block is placed on the bottom plate, an elastic cavity is provided in the elastic block, air is filled in the elastic cavity, a sliding cavity communicating with the elastic cavity is further provided on the upper load-bearing arm on one side of the elastic block, a first piston body is slidably arranged in the sliding cavity, a rack is fixed on the surface of the first piston body close to the rotating gear, and a transmission gear is further provided on the gear shaft, and the rack meshes with the transmission gear.

[0010] The beneficial effect is that through the above settings, when the hoisting equipment lifts the main body of the lifting tool upward through the lifting ring, the culvert pipe exerts a downward acting force on the main body of the lifting tool. At this time, the lifting ring and the movable frame slide upward relative to the fixed frame, the movable frame drives the bottom plate to slide upward, and then the elastic block is squeezed in the cavity. When the gas in the elastic cavity is squeezed, the gas in the elastic cavity is pressed into the sliding cavity and drives the first piston body to slide along the sliding cavity. Through the meshing of the rack and the transmission gear, the transmission gear is further pushed to rotate and then drive the rotating gear to rotate, realizing the pressing of the pressing rod. This pressing process is stable and can effectively eliminate the risk of loosening, ensuring the safety of the hoisting process.

[0011] Preferably, as an improvement, a first return spring for resetting is sleeved on the outer surface of the pressure rod, and a pressure block is fixed at the bottom of the pressure rod.

[0012] The beneficial effects are as follows: After the culvert is successfully installed, the downward force provided by the culvert to the lifting ring disappears. After the pressing is completed, the first return spring provides an elastic force to the pressure rod to pull it back to the initial position, eliminating the need for manual reset or additional operations, improving the efficiency of cyclic operation. After the load is released, the main body of the lifting tool can immediately start the next hoisting - limiting cycle, avoiding construction interruption caused by the retention of the pressure rod.

[0013] Preferably, as an improvement, through holes for the pressure rod to slide are formed in the upper load-bearing arm. At least one oil delivery part is arranged circumferentially on the pressure rod. Each oil delivery part includes a first oil delivery pipeline and an oil storage cavity. The oil storage cavities are all communicated with the through holes through the first oil delivery pipelines. A temporary storage cavity is arranged in each first oil delivery pipeline. A magnetic plug for blocking the upper load-bearing arm is slidably arranged in each temporary storage cavity. A return member is arranged on one side of each magnetic plug. A magnetic member is arranged inside the pressure rod and has the same magnetism as the magnetic plug. A second piston body is hermetically slidably arranged in the oil storage cavity. An air pipe communicated with the sliding cavity is arranged on the side of each oil storage cavity away from the upper load-bearing arm.

[0014] The beneficial effects are as follows: Through the above settings, during the sliding process of the pressure rod, the magnetic member and the magnetic plug are driven to face each other. The magnetic repulsion force between the two drives the magnetic plug to slide along the temporary storage cavity, making the first oil delivery pipeline unobstructed. At the same time, an air pipe communicated with the sliding cavity is arranged on the side of each oil storage cavity away from the first oil delivery pipeline. When the gas compressed in the elastic cavity enters the oil storage cavity and simultaneously pushes the second piston body to slide, the oil in the oil storage cavity enters the through hole through the first oil delivery pipeline for lubrication, which can reduce the friction between the pressure rod and the through hole, make the sliding of the pressure rod smoother, and extend the service life of key components such as rotating gears and pressure rods.

[0015] Preferably, as an improvement, at least one second return spring is arranged between the movable frame and the fixed frame, and a plurality of grooves for the lifting ring to be clamped are arrayed on the lower surface of the movable frame.

[0016] The beneficial effects are as follows: By arranging the second return spring, after the transportation of one culvert is completed, the movable frame is driven to slide downward and reset under the action of the second return spring for the next transportation. At the same time, the second return spring drives the rotating gear to rotate to assist the pressure rod to return to its position. By arranging a plurality of grooves on the lower surface of the movable frame, the hoisting center of gravity of the main body of the lifting tool can be changed by changing the clamping position of the lifting ring, so as to be applicable to hoisting culverts of different sizes and specifications, with a wider application range.

[0017] Preferably, as an improvement, a second oil delivery channel is also communicated between the side walls of the temporary storage cavity. The second oil delivery channel surrounds the side of the pressure rod and is communicated with the through groove.

[0018] The beneficial effects are as follows: when the lubricating oil is pressed into the temporary storage cavity, part of the lubricating oil can flow into the second oil delivery channel, and the lubricating oil is guided to the other side of the pressure rod through the second oil delivery channel, so as to lubricate the pressure rod circumferentially and improve the lubrication effect on the pressure rod.

[0019] Preferably, as an improvement, connecting rods are provided on both sides of the movable frame, and the two ends of the connecting rods are respectively fixed to the movable frame and the bottom plate.

[0020] Preferably, as an improvement, a rubber pad is fixedly provided at the bottom of the pressing block.

[0021] The beneficial effects are as follows: it can prevent the pressing block from directly contacting the culvert pipe, avoid the surface quality of the culvert pipe from being reduced due to being squeezed by the pressing block, and at the same time can play a role in preventing the culvert pipe from sliding and shifting.

[0022] A drainage pipe hoisting method, characterized in that it uses the drainage pipe hoisting equipment described in any one of claims 1 to 9, and includes the following steps: First step, hang the lifting ring on the hook of the hoisting equipment, and drive the main body of the lifting tool to move through the hoisting equipment, so that the lower load-bearing arm of the main body of the lifting tool is inserted into the culvert pipe;

[0023] Second step, the hoisting equipment lifts the main body of the lifting tool upward, the lifting ring drives the rotating gear to rotate, and the rotation of the rotating gear drives the pressure rod to move downward to press the culvert pipe tightly;

[0024] Third step, when the culvert pipe is hoisted to the designated position, place the culvert pipe on the ground, and then the main body of the lifting tool continues to descend, the pressure rod resets and no longer presses the culvert pipe tightly, remove the main body of the lifting tool from the culvert pipe, and lay the culvert pipe. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0026] Figure 2 is a front view of an embodiment of the present invention;

[0027] Figure 3 is a longitudinal sectional view of an embodiment of the present invention;

[0028] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0029] Figure 5 is a horizontal sectional view of the upper load-bearing arm of an embodiment of the present invention.

[0030] The reference numerals in the attached drawings of the specification include: upper load-bearing arm 1, lower load-bearing arm 2, fixing bracket 3, pressure bar 4, rotating gear 5, lifting ring 6, tooth 7, gear shaft 8, movable bracket 9, bottom plate 10, cavity 11, elastic block 12, connecting pipe 13, sliding cavity 14, first piston body 15, rack 16, driving gear 17, first return spring 18, pressing block 19, oil storage cavity 20, first oil pipeline 21, temporary storage cavity 22, magnetic plug 23, return member 24, second piston body 25, air pipe 26, second return spring 27, embedding groove 28, rubber pad 29, second oil passage 30, magnetic member 31. Detailed implementation manners

[0031] The following is a further detailed description through specific implementation manners and embodiments:

[0032] The preferred embodiment of the present invention is basically as shown in the attached Figures 1 - 5 drawings, such as Figure 1 and Figure 2 shown in the drainage pipeline hoisting device, which includes a sling main body. The sling main body is U-shaped and includes an upper load-bearing arm 1 and a lower load-bearing arm 2. A fixing bracket 3 is provided on the upper load-bearing arm 1. A first driving part and a second driving part are sequentially arranged in the upper load-bearing arm 1. A pressure bar 4 is longitudinally slidably arranged on the upper load-bearing arm 1. Specifically, a through hole for the pressure bar 4 to slide is opened on the upper load-bearing arm 1. The first driving part includes a rotating gear 5 rotatably arranged in the upper load-bearing arm 1. The reciprocating rotation of the rotating gear 5 can drive the pressure bar 4 to slide up and down to realize clamping of the culvert. For example, the rotating gear 5 is set as the driving member, and a transmission belt is sleeved on the rotating gear 5 and the pressure bar 4. The up and down sliding of the pressure bar 4 is realized through the rotation of the rotating gear 5 to drive the transmission belt. In order to make the structure simple, reliable and easy to assemble, the preferred implementation manner adopted by the present invention is that teeth 7 meshing with the rotating gear 5 are opened on the side of the pressure bar 4. The gear transmission is stable and has stability. There are various installation methods for the rotating gear 5 and the upper load-bearing arm 1. The first driving part of the present invention also includes a gear shaft 8. Both ends of the gear shaft 8 are rotatably embedded in the upper load-bearing arm 1, and the rotating gear 5 is clamped and connected with the gear shaft 8. There are various clamping and fixing methods for the rotating gear 5 and the gear shaft 8. The present invention adopts key connection between the rotating gear 5 and the gear shaft 8. A lifting ring 6 is provided on the second driving part. After the lifting ring 6 bears the weight, the second driving part drives the rotating gear 5 to rotate. When the second driving part drives the rotating gear 5 to rotate, through the meshing of the rotating gear 5 with the teeth 7 on the side of the pressure bar 4, the pressure bar 4 can be driven to slide down for clamping.

[0033] In this technical solution, the main body of the lifting tool includes an upper load-bearing arm 1 and a lower load-bearing arm 2. When installing a culvert pipe, the lower load-bearing arm 2 of the main body of the lifting tool penetrates into the central cavity of the culvert pipe, and the hook of the lifting equipment hangs on the lifting ring 6. The hook is lifted upward to drive the main body of the lifting tool and the culvert pipe to move upward. When the lifting ring 6 bears the load, the second driving part drives the rotating gear 5 to rotate. When the rotating gear 5 rotates, it drives the pressure rod 4 to slide along the upper load-bearing arm 1. When the pressure rod 4 slides downward, the lower part of the pressure rod 4 can abut against the culvert pipe, restricting the movement of the culvert pipe and forming a clamping force to tightly fix the culvert pipe. This can effectively prevent the culvert pipe from accidentally slipping out of the lifting tool due to shaking or collision during hoisting and transportation, reduce the risk of pipeline damage and secondary construction, and protect the safety of construction personnel and equipment. Through the above settings, this technical solution realizes automatic limiting and pressing to ensure that the culvert pipe is firmly fixed immediately after being positioned, avoiding the cumbersome operations of manual pulling or auxiliary supports, making the hoisting process more stable and controllable, and thus improving the overall construction safety and installation accuracy.

[0034] To make the structure simple and reliable and easy to assemble, such as Figure 3 and Figure 4As shown in the figure, the preferred implementation mode adopted by the second driving part of the present invention is that the second driving part includes a movable frame 9 and a bottom plate 10. The lifting ring 6 is installed on the movable frame 9, and the movable frame 9 can slide longitudinally relative to the fixed frame 3. There are various ways to realize the longitudinal sliding of the movable frame 9 along the fixed frame 3. For example, it can be the cooperation of a guide block and a guide rail, the cooperation of a slide rail and a slide groove, etc. In order to make the structure simple and reliable and easy to assemble, the preferred implementation mode adopted by the present invention is that at least one guide post is provided on the fixed frame 3, and the number of guide holes opened on the movable frame 9 is the same as that of the guide posts and is in sliding fit with the guide posts. In order to realize the rotation of the rotating gear 5 driven by the second driving part after the lifting ring 6 bears weight, there are many forms that can be realized. For example, a first rack is fixed on the movable frame, a second rack is provided on the fixed frame, and a driven gear is provided and meshes with the first rack and the second rack respectively at the same time. A first transmission part is coaxially provided on the driven gear, a second transmission part is coaxially provided on the rotating gear 5, and a transmission belt is sleeved on the first transmission part and the second transmission part for transmission. In order to make the structure simple and reliable and the operation stable, the preferred implementation mode adopted by the second driving part of the present invention is that a cavity 11 is provided inside the upper load-bearing arm 1, the bottom plate 10 is slidably arranged in the cavity 11, both sides of the movable frame 9 penetrate into the cavity 11 and are fixed to the bottom plate 10, and an elastic block 12 is placed on the bottom plate 10. The elastic block 12 in the present invention includes an elastic outer shell, an elastic cavity is provided inside the elastic outer shell, and the elastic cavity is filled with air. A sliding cavity 14 communicated with the elastic cavity is also provided on one side of the elastic block 12 close to the rotating gear 5. Specifically, the form of communication is not limited. In the present invention, a communication pipe 13 is provided between the sliding cavity 14 and the elastic cavity for communication. A first piston body 15 is slidably arranged in the sliding cavity 14, a rack 16 is fixed on the surface of the first piston body 15 close to the rotating gear 5. There are various fixing methods for the rack 16, and welding or bolt connection can be used for fixing; a transmission gear 17 is also key-connected to the gear shaft 8, and the rack 16 meshes with the transmission gear 17. The gear shaft 8 in the present invention has a certain length so that the rack 16 will not interfere with the pressure column during the meshing process; during implementation, when the lifting equipment lifts the sling body upward through the lifting ring 6, the culvert pipe exerts a downward acting force on the sling body. At this time, the lifting ring 6 and the movable frame 9 slide upward relative to the fixed frame 3, the movable frame 9 drives the bottom plate 10 to slide upward, and then the elastic block 12 is squeezed in the cavity 11. When the gas in the elastic cavity is squeezed, the gas in the elastic cavity is pressed into the sliding cavity 14 and drives the first piston body 15 to slide along the sliding cavity 14. Through the meshing of the rack 16 and the transmission gear 17, the transmission gear 17 is pushed to rotate and then drives the rotating gear 5 to rotate, realizing the pressing of the pressing rod 4. This pressing process is stable and can effectively prevent the risk of loosening, ensuring the safety of the lifting process.

[0035] To make the structure simple, reliable and easy to assemble, the preferred embodiment adopted by the present invention is that a first return spring 18 for resetting is sleeved on the outer surface of the pressure rod 4. There are also various installation methods for the spring. For example, both ends of the first return spring 18 are respectively abutted against the upper end of the pressure rod 4 and the upper surface of the upper load-bearing arm 1. A pressure block 19 is fixed at the bottom of the pressure rod 4. After the culvert is successfully installed, the downward force provided by the culvert to the lifting ring 6 disappears. After the first return spring 18 is compressed, it provides an elastic force to pull the pressure rod 4 back to its initial position, eliminating the need for manual reset or additional operations, improving the efficiency of cyclic operation. After the lifting tool body releases the load, it can immediately start the next hoisting-limiting cycle, avoiding construction interruption caused by the retention of the pressure rod 4. To make the structure simple, reliable and easy to assemble, the preferred embodiment adopted by the present invention is that a rubber pad 29 is fixedly provided at the bottom of the pressure block 19, to avoid direct contact between the pressure block 19 and the culvert, prevent the culvert from being squeezed by the pressure block 19 and reducing the surface quality, and at the same time play a role in preventing the culvert from sliding and shifting.

[0036] To make the structure simple, reliable and easy to assemble, the preferred embodiment adopted by the present invention is that at least one oil delivery part is provided circumferentially on the pressure rod 4. Each oil delivery part includes a first oil delivery pipeline 21 and an oil storage cavity 20. Each oil storage cavity 20 is communicated with the through hole through the first oil delivery pipeline 21. A temporary storage cavity 22 is provided in each first oil delivery pipeline 21. A magnetic plug 23 capable of blocking the first oil delivery pipeline 21 is slidably provided in each temporary storage cavity 22. A return member 24 is provided on one side of each magnetic plug 23. There are various forms that the return member 24 can adopt. For example, in the present invention, the return member 24 is a third return spring, and both ends of the third return spring are respectively abutted against the magnetic plug 23 and the side wall of the temporary storage cavity 22. A magnetic member 31 is provided on the upper part of the pressure rod 4 and has the same magnetism as the magnetic plug 23. There are various fixing forms for the magnetic member 31. For example, the magnetic member 31 is embedded or fixed on the pressure rod 4 with glue. A second piston body 25 is slidably provided in the oil storage cavity 20 in a sealed manner. An air pipe 26 communicating with the sliding cavity 14 is provided on one side of each oil storage cavity 20 away from the first oil delivery pipeline 21. During the sliding process of the pressure rod 4, the magnetic member 31 is driven to face the magnetic plug 23, and the magnetic repulsion force between the two drives the magnetic plug 23 to slide along the temporary storage cavity 22 to make the first oil delivery pipeline unobstructed. At the same time, an air pipe 26 communicating with the side of the sliding cavity 14 away from the rotating gear 5 is provided on one side of each oil storage cavity 20 away from the first oil delivery pipeline 21. When the gas squeezed in the elastic cavity enters the oil storage cavity 20 and simultaneously pushes the second piston body 25 to slide, the oil in the oil storage cavity 20 enters the through hole through the first oil delivery pipeline 21 for lubrication, which can reduce the friction between the pressure rod 4 and the through hole, make the sliding of the pressure rod 4 smoother, and extend the service life of key components such as the rotating gear 5 and the pressure rod 4. To make the structure simple, reliable and easy to assemble, the preferred embodiment adopted by the present invention is, as Figure 5As shown, a second oil delivery channel 30 is also connected between the side walls of the temporary storage cavity 22. The second oil delivery channel 30 surrounds the side of the pressure rod 4 and is connected to the through groove. When lubricating oil is pressed into the temporary storage cavity 22, part of the lubricating oil can flow into the second oil delivery channel 30, and the lubricating oil is guided to the other side of the pressure rod 4 through the second oil delivery channel 30, so as to lubricate the circumference of the pressure rod 4 and improve the lubrication effect on the pressure rod 4.

[0037] To make the structure simple, reliable and easy to assemble, the preferred implementation mode adopted by the present invention is that at least one second return spring 27 is provided between the movable frame 9 and the fixed frame 3, and a plurality of slots 28 for the hanging rings 6 to be clamped are arranged in an array on the lower surface of the movable frame 9. By setting the second return spring 27, after the transportation of a culvert is completed, the movable frame 9 is driven to slide downward and reset under the action of the second return spring 27 for the next transportation. At the same time, the second return spring 27 drives the rotating gear 5 to rotate to assist the pressure rod 4 to return to its position. By arranging a plurality of slots 28 on the lower surface of the movable frame 9, the lifting gravity center of the sling body can be changed by changing the clamping position of the hanging rings 6, so as to be applicable to hoisting culverts of different sizes and specifications, and the application range is wider.

[0038] To make the structure simple, reliable and easy to assemble, the preferred implementation mode adopted by the present invention is that connecting rods are provided on both sides of the movable frame 9, and the two ends of the connecting rods are respectively fixed to the movable frame and the bottom plate.

[0039] The cross-sectional shape of the pressure rod 4 is diverse. To make the structure simple, reliable and easy to assemble, the preferred implementation mode adopted by the present invention is that the cross-section of the pressure rod 4 is rectangular, and the cross-section of the through hole is also rectangular and matches the cross-section of the pressure rod 4. During operation, the rectangular pressure rod 4 is convenient for arranging teeth 7 to ensure that the rotating gear 5 always meshes with the teeth 7 stably.

[0040] A method for hoisting a drainage pipeline equipment, which is applicable to the above-mentioned drainage pipeline hoisting equipment, includes the following steps: First step, first clamp the hanging ring 6 in the predetermined slot 28, and then hang the hanging ring 6 on the hook of the hoisting equipment. The sling body is driven to move by the hoisting equipment so that the lower load-bearing arm 2 of the sling body is inserted into the culvert.

[0041] Second step, the hoisting equipment lifts the sling body upward, and the hanging ring 6 drives the movable frame 9 and the bottom plate 10 to move upward, squeezing the elastic block 12, so that the air inside the elastic cavity is pressed into the sliding cavity 14, pushing the first piston body 15 and the rack 16 to slide, and then the rotating gear 5 rotates to push the pressure rod 4 and the pressing block 19 to move downward to clamp the culvert tightly.

[0042] In the third step, when the push rod 4 slides, when the magnetic member 31 faces the magnetic plug 23, the repulsive force pushes the magnetic plug 23 to move, so that the first oil delivery channel 21 is unblocked. At the same time, the air entering the inside of the sliding cavity 14 enters the oil storage cavity 20 along the air pipe 26, pushing the second piston body 25 to move, so as to squeeze out the lubricating oil inside the oil storage cavity 20 along the first oil delivery channel 21 to lubricate the gap between the push rod 4 and the through hole.

[0043] In the fourth step, when the culvert pipe is transported to the designated position, place the culvert pipe on the ground. Then, the main body of the lifting tool continues to descend. At this time, the push rod 4 and the pressing block 19 are reset and no longer press the culvert pipe tightly. Furthermore, the main body of the lifting tool can be removed from the culvert pipe to lay the culvert pipe.

[0044] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. Hoisting device and method for drainage pipes, characterized in that: It includes a sling body. The sling body is U-shaped and includes an upper load-bearing arm (1) and a lower load-bearing arm (2). A fixing frame (3) is provided on the upper load-bearing arm (1). A first driving part and a second driving part are successively arranged in the upper load-bearing arm (1). A pressure rod (4) is slidably arranged on the upper load-bearing arm (1). The first driving part includes a rotating gear (5) rotatably arranged in the upper load-bearing arm (1) through a gear shaft (8). The rotation of the rotating gear (5) can drive the pressure rod (4) to slide downward to press the culvert tightly. A lifting ring (6) is provided on the second driving part. After the lifting ring (6) bears the weight, the second driving part drives the rotating gear (5) to rotate.

2. The drainage pipe hoisting device according to claim 1, characterized in that: Teeth (7) meshing with the rotating gear (5) are formed on the side of the pressure rod (4), and the gear shaft (8) is rotatably arranged in the upper load-bearing arm (1).

3. The drainage pipeline hoisting device according to claim 2, characterized in that: The second driving part includes a movable frame (9) and a bottom plate (10). The lifting ring (6) is installed on the movable frame (9). The movable frame (9) is slidably installed on the fixing frame (3). A cavity (11) is provided in the upper load-bearing arm (1). The bottom plate (10) is slidably arranged in the cavity (11). Both sides of the movable frame (9) penetrate into the cavity (11) and are fixedly connected to the bottom plate (10). An elastic block (12) is placed on the bottom plate (10). An elastic cavity is provided in the elastic block (12), and the elastic cavity is filled with air. A sliding cavity (14) communicating with the elastic cavity is further provided on one side of the upper load-bearing arm (1) where the elastic block (12) is located. A first piston body (15) is slidably arranged in the sliding cavity (14). A rack (16) is fixed on the surface of the first piston body (15) close to the rotating gear (5). A transmission gear (17) is further provided on the gear shaft (8), and the rack (16) meshes with the transmission gear (17).

4. The drainage pipe hoisting device according to claim 1, characterized in that: A first return spring (18) for resetting is sleeved on the outer surface of the pressure rod (4), and a pressure block (19) is fixed at the bottom of the pressure rod (4).

5. The drainage pipeline hoisting device and method according to claim 1, characterized in that: Through holes for the pressure rod (4) to slide are formed on the upper load-bearing arm (1). At least one oil delivery part is provided circumferentially on the pressure rod (4). Each oil delivery part includes a first oil delivery pipe (21) and an oil storage cavity (20). The oil storage cavities (20) are all communicated with the through holes through the first oil delivery pipes (21). A temporary storage cavity (22) is provided in each first oil delivery pipe (21). A magnetic plug (23) capable of blocking the first oil delivery pipe (21) is slidably arranged in the temporary storage cavity (22). A return member (24) is provided on one side of each magnetic plug (23). A magnetic member (31) with the same magnetism as the magnetic plug (23) is provided inside the pressure rod (4). A second piston body (25) is slidably and sealingly arranged in the oil storage cavity (20). Air pipes (26) communicating with the sliding cavity (14) are provided on one side of each oil storage cavity (20) away from the first oil delivery pipe (21).

6. The drainage pipe hoisting device according to claim 3, characterized in that: At least one second return spring (27) is provided between the movable frame (9) and the fixing frame 3, and a plurality of slots (28) for the lifting ring (6) to be clamped are arrayed on the lower surface of the movable frame (9).

7. The drainage pipe hoisting device and method according to claim 5, characterized in that: Second oil delivery channels (30) are also communicated between the side walls of the temporary storage cavities (22). The second oil delivery channels (30) surround the side of the pressure rod (4) and are communicated with the through grooves.

8. The drainage pipe hoisting device according to claim 3, characterized in that: Connecting rods are provided on both sides of the movable frame (9), and both ends of the connecting rods are fixedly connected to the movable frame (9) and the bottom plate (10) respectively.

9. The drainage pipe hoisting device according to claim 4, wherein: A rubber pad (29) is fixedly provided at the bottom of the briquette (19).

10. Hoisting method for drainage pipes, characterized in that, The drainage pipe hoisting equipment described in any one of claims 1 to 9 is adopted, and the following steps are included: First step, hang the lifting ring (6) on the hook of the hoisting equipment, and drive the main body of the lifting tool to move through the hoisting equipment, so that the lower load-bearing arm (2) of the main body of the lifting tool is inserted into the culvert; Second step, the hoisting equipment lifts the main body of the lifting tool upward, the lifting ring (6) drives the rotating gear (5) to rotate, and the rotation of the rotating gear (5) drives the pressure rod (4) to move downward to compress the culvert; Third step, when the culvert is transported to the designated position, place the culvert on the ground. After that, the main body of the lifting tool continues to descend, the pressure rod (4) resets and no longer compresses the culvert. Remove the main body of the lifting tool from the culvert and lay the culvert.

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