Large-diameter heavy pipe mounting device and mounting method thereof

Abstract

The invention provides a large-diameter heavy pipe mounting device and a mounting method thereof.The large-diameter heavy pipe mounting device comprises a to-be-mounted pipe body, a butt-joint pipe body and a mounted pipe body, and the heavy pipe mounting device comprises a hoisting butt-joint mechanism used for hoisting the to-be-mounted pipe body to the butt-joint end of the butt-joint pipe body and provided with a connecting opposite-pulling assembly; and the built-in opposite-pulling mechanism is arranged in the installed pipe body, extends out of the butt-joint end of the butt-joint pipe body and can be connected with the connecting opposite-pulling assembly, and butt joint of the pipe body to be installed and the butt-joint pipe body is completed through opposite pulling of the connecting opposite-pulling assembly. The hoisting butt joint mechanism can be inserted into the pipe body to be installed for hoisting, a steel wire rope is not needed for binding, the workload of workers can be reduced, and therefore the stability during hoisting is ensured, in addition, the opposite pulling mechanism is arranged in the installed pipe body, accurate butt joint of the pipe body is conveniently formed through connection and opposite pulling of the opposite pulling mechanism and the installed pipe body, and multi-person cooperation for positioning is not needed. The tedious operation of manually binding the heavy pipe during hoisting and positioning and locking the heavy pipe during mounting is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of pipeline installation, and more particularly to a large-diameter heavy pipe installation device and an installation method thereof. Background Art

[0002] The installation of large-diameter heavy pipes is one of the key processes in pipeline construction. Due to their large volume and heavy self-weight, there are great difficulties in handling, hoisting, and positioning and fixing during the installation process. Traditional construction methods usually use steel wire ropes to directly bind and hoist, which not only requires workers to manually tie them firmly, but also has a high risk of steel wire rope breakage during the process, with a low safety factor, and at the same time, it is easy to cause wear on the surface of the heavy pipe and the steel wire rope. In addition, when the heavy pipe is hoisted to the designated position, multiple workers are required to cooperate to complete the positioning and locking operations, resulting in high construction intensity, low efficiency, and complex operations. Therefore, a large-diameter heavy pipe installation device and an installation method thereof are proposed to solve the above problems. Summary of the Invention

[0003] The main object of the present invention is to provide a large-diameter heavy pipe installation device and an installation method thereof, which solve the problems of poor hoisting stability, high construction intensity, low efficiency, and complex operation in the existing installation method for the docking of pipes.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a large-diameter heavy pipe installation device and an installation method thereof, including a pipe body to be installed, a docking pipe body, and an installed pipe body. The heavy pipe installation device includes: A hoisting and docking mechanism for hoisting the pipe body to be installed to the docking end of the docking pipe body, and a connecting and pulling component is arranged thereon; An internal pulling mechanism is built in the installed pipe body and extends outside the docking end of the docking pipe body, and can be connected to the connecting and pulling component, and the docking of the pipe body to be installed and the docking pipe body is completed through the pulling of the connecting and pulling component.

[0005] In a preferred embodiment, the hoisting and docking mechanism includes a laterally inverted L-shaped hanging rod. A plurality of hanging ears are arranged on the top of the cross beam of the L-shaped hanging rod, and a first pipe body fixing mechanism is arranged at the bottom of the vertical beam of the L-shaped hanging rod. The L-shaped hanging rod and the first pipe body fixing mechanism form a laterally inverted U shape, and the length of the first pipe body fixing mechanism is greater than the length of the cross beam of the L-shaped hanging rod. The connecting and pulling component is arranged at the docking end of the first pipe body fixing mechanism.

[0006] In a preferred embodiment, the internal pulling mechanism includes a second pipe body fixing mechanism, and a docking portion that can be connected to the connecting and pulling component is arranged at the docking end of the second pipe body fixing mechanism.

[0007] In a preferred embodiment, both the first pipe body fixing mechanism and the second pipe body fixing mechanism include an outer sleeve. A rotating shaft is rotatably arranged inside the outer sleeve through a bearing. A corresponding number of moving shafts are threadedly sleeved on the rotating shaft through a plurality of threaded segments arranged on the outside thereof. A plurality of annularly distributed telescopic locking portions are arranged between the outside of the moving shaft and the outside of the outer sleeve. And a linear limiting groove for connecting the telescopic locking portion and the moving shaft is arranged on the wall surface of the outer sleeve. The telescopic locking portion realizes the telescopic effect through the rotation of the rotating shaft. A plurality of groups of telescopic pulley assemblies are also arranged on the outside of the outer sleeve.

[0008] In a preferred embodiment, the telescopic locking portion includes a moving seat, a fixed seat and a supporting seat. Among them, the moving seat is arranged on the moving shaft, the fixed seat is arranged on the outer sleeve, and the moving seat and the fixed seat are collinear. Two symmetrical connecting rods are hinged to the bottom of the supporting seat, and the other ends of the two connecting rods are respectively hinged to the moving seat and the fixed seat. An arc-shaped locking plate is arranged on the supporting seat.

[0009] In a preferred embodiment, the number of a group of telescopic pulley assemblies is multiple and they are annularly distributed on the outside of the outer sleeve. The telescopic pulley assembly includes an electric telescopic cylinder, and an axial pulley is arranged on the telescopic end of the electric telescopic cylinder.

[0010] In a preferred embodiment, the rotating shaft of the second pipe body fixing mechanism extends to the outside of the butt joint pipe body and is connected to the butt joint portion. The butt joint portion is a multi-sided prism with a diameter larger than that of the rotating shaft. The rotating shaft of the first pipe body fixing mechanism is a hollow shaft with openings at both ends. The connecting tensioning assembly includes a telescopic rod movably inserted into the butt joint end of the rotating shaft. A plurality of sliding key grooves are arranged on the inner wall surface of the butt joint end. A sliding key block slidably matched with the sliding key grooves is arranged at the end of the telescopic rod. A tensioning telescopic cylinder is also arranged in the rotating shaft. The telescopic end of the tensioning telescopic cylinder is connected to the telescopic rod. An automatic clamping jaw capable of clamping the butt joint portion is arranged at the outer end of the telescopic rod. Grooves adapted to the butt joint portion are arranged on the claw body of the automatic clamping jaw.

[0011] In a preferred embodiment, the hoisting and docking mechanism includes a driving mechanism for driving the rotation of the rotating shaft. It includes a driving device arranged at the bottom end of the L-shaped hanging rod. A transmission gear is arranged on the output shaft of the driving device. A driven gear meshing with the transmission gear is arranged at the end of the rotating shaft passing through the L-shaped hanging rod.

[0012] In a preferred embodiment, the butt joint portion is rotatably arranged on the rotating shaft of the second pipe body fixing mechanism. A T-shaped mounting hole is arranged at the butt joint end of the rotating shaft of the second pipe body fixing mechanism. A jack is arranged through the T-shaped mounting hole. A mounting seat rotatably matched with the T-shaped mounting hole is arranged at the end of the butt joint portion. A plurality of annularly distributed pin holes are arranged through the mounting seat. A screw nut is installed in the T-shaped mounting hole and any one of the pin holes.

[0013] The method includes: S1. Ensure that the built-in tensioning mechanism is located in the installed pipe body, keep the telescopic locking part in a fitting and locking state with the installed pipe body, and the docking part on it is located outside the docking pipe body; S2. Complete the hoisting work of the hoisting docking mechanism by the hoisting equipment, and insert the first pipe fixing mechanism of the hoisting docking mechanism into the pipe to be installed. Before insertion, adjust the telescopic pulley assembly on it to be adapted to the inner diameter of the pipe to be installed, and rotate the rotating shaft after complete insertion so that the telescopic locking part fits with the pipe to be installed, thereby fixing the pipe to be installed; S3. Use the hoisting equipment and the hoisting docking mechanism to hoist the pipe to be installed to the docking end of the docking pipe body, then complete the connection of the tensioning component and the docking part, and then complete the docking work of the pipe to be installed and the docking pipe body through the cooperation of the hoisting equipment and the tensioning of the tensioning component; S4. Through the connection of the tensioning component and the docking part, synchronously rotate the rotating shafts of the first pipe fixing mechanism and the second pipe fixing mechanism so that the telescopic locking parts of the first pipe fixing mechanism and the second pipe fixing mechanism are in contact and fitting relationship, and then use the hoisting equipment to pull the hoisting docking mechanism and the built-in tensioning mechanism outward until the built-in tensioning mechanism is moved into the docking pipe body, and after the pipe to be installed is completely separated from the pipe to be installed, rotate the rotating shaft again to fix the built-in tensioning mechanism in the docking pipe body, and then disconnect the connection between the tensioning component and the docking part; S5. Repeat steps S2 - S4 until all pipelines are installed.

[0014] The present invention provides a large-diameter heavy pipe installation device and its installation method. It can be hoisted by inserting the hoisting docking mechanism into the pipe to be installed, without using steel wire ropes for binding, which can reduce the workload of workers, thereby ensuring the stability during hoisting. In addition, by installing a built-in tensioning mechanism in the installed pipe body, it is convenient to form precise docking of the pipe bodies through their connection and tensioning, without the need for multiple people to cooperate for positioning, greatly reducing the cumbersome operations of manually binding heavy pipes during hoisting and positioning and locking heavy pipes during installation. It is convenient, fast, and reliable in quality. At the same time, the position of the built-in tensioning mechanism can be adjusted through the hoisting docking mechanism to facilitate the installation of the next pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present invention in conjunction with the drawings and embodiments: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the present invention Figure 1 structural schematic diagram from another perspective; Figure 3 is the structural diagram of the hoisting docking mechanism of the present invention; Figure 4 is the exploded structural diagram of the hoisting docking mechanism of the present invention; Figure 5 It is the structure diagram of the built-in tensioning mechanism of the present invention; Figure 6 It is the semi-sectional structure diagram of the common structure of the first pipe body fixing mechanism and the second pipe body fixing mechanism of the present invention; Figure 7 It is the structure diagram of the telescopic pulley assembly of the present invention; Figure 8 It is the structure diagram of the telescopic locking part of the present invention; Figure 9 It is the semi-sectional structure diagram of the second pipe body fixing mechanism of the present invention; Figure 10 It is the present invention Figure 2 The enlarged view of structure A in; Figure 11 It is the installation structure diagram of the docking part of the present invention; Figure 12 It is the connection structure diagram of connecting the tensioning assembly and the docking part in step S3 of the present invention; Figure 13 It is the docking structure diagram of the pipe body to be installed and the docking pipe body in step S3 of the present invention; Figure 14 It is the structure diagram of moving the built-in tensioning mechanism in step S4 of the present invention; Figure 15 It is the disconnection structure diagram of the hoisting docking mechanism in step S4 of the present invention; In the figure: the pipe body 1 to be installed, the docking pipe body 2, the installed pipe body 3; the hoisting docking mechanism 4; the L-shaped suspension rod 40; the lifting lug 41; the first pipe body fixing mechanism 42; the connecting tensioning assembly 43; the sliding keyway 430; the telescopic rod 431; the sliding key block 432; the automatic clamping jaw 433; the tensioning telescopic cylinder 434; the driving mechanism 44; the driven gear 440; the driving device 441; the transmission gear 442; the built-in tensioning mechanism 5; the second pipe body fixing mechanism 50; the outer sleeve 501; the telescopic pulley assembly 502; the electric telescopic cylinder 5020; the axial pulley 5021; the bearing 503; the rotating shaft 504; the threaded section 505; the moving shaft 506; the linear limiting groove 507; the telescopic locking part 508; the moving seat 5080; the fixed seat 5081; the support seat 5082; the connecting rod 5083; the arc locking plate 5084; the docking part 51; the T-shaped installation hole 510; the jack 511; the installation seat 512; the pin hole 514; the screw nut 515. Detailed implementation mode

[0016] Embodiment 1 Such as Figure 1-11As shown in the figure, a large-diameter heavy pipe installation device includes a pipe body 1 to be installed, a docking pipe body 2, and an installed pipe body 3. The heavy pipe installation device includes a hoisting and docking mechanism 4 and an internal tensioning mechanism 5. Among them, the hoisting and docking mechanism 4 is used to hoist the pipe body 1 to be installed to the docking end of the docking pipe body 2, and a connecting and tensioning component 43 is arranged thereon. The internal tensioning mechanism 5 is built into the installed pipe body 3 and extends outside the docking end of the docking pipe body 2. It can be connected to the connecting and tensioning component 43, and the docking of the pipe body 1 to be installed and the docking pipe body 2 is completed through the tensioning of the connecting and tensioning component 43.

[0017] With such a design, the hoisting and docking mechanism 4 can hoist the pipe body 1 to be installed to the docking position of the docking pipe body 2. After forming a connection with the internal tensioning mechanism 5 in the installed pipe body 3, through the tensioning of the connecting and tensioning component 43 and the supporting force provided by the installed pipe body 3, the docking work of the pipe body 1 to be installed and the docking pipe body 2 is completed, thus achieving the effects of stable hoisting and precise docking.

[0018] Among them, the hoisting and docking mechanism 4 includes a laterally inverted L-shaped hanging rod 40. Multiple lifting lugs 41 are arranged at the top of the cross beam of the L-shaped hanging rod 40. In this embodiment, the number of lifting lugs 41 is two. A first pipe body fixing mechanism 42 is arranged at the bottom of the vertical beam of the L-shaped hanging rod 40. The L-shaped hanging rod 40 and the first pipe body fixing mechanism 42 form a laterally inverted U shape, and the length of the first pipe body fixing mechanism 42 is greater than the length of the cross beam of the L-shaped hanging rod 40, so as to facilitate inserting the first pipe body fixing mechanism 42 into the pipe body 1 to be installed to form an effective hoisting structure. The connecting and tensioning component 43 is arranged at the docking end of the first pipe body fixing mechanism 42, which is convenient for docking with the internal tensioning mechanism 5.

[0019] In addition, the internal tensioning mechanism 5 includes a second pipe body fixing mechanism 50, and a docking part 51 that can be connected to the connecting and tensioning component 43 is arranged at the docking end of the second pipe body fixing mechanism 50.

[0020] In the preferred solution, both the first pipe body fixing mechanism 42 and the second pipe body fixing mechanism 50 include an outer sleeve 501. A rotating shaft 504 is rotatably arranged inside the outer sleeve 501 through a bearing 503. A corresponding number of moving shafts 506 are threadedly sleeved on the rotating shaft 504 through a plurality of threaded segments 505 arranged on its outer part. A plurality of annularly distributed telescopic locking parts 508 are arranged between the outer part of the moving shaft 506 and the outer part of the outer sleeve 501. In this embodiment, the number of the threaded segments 505 and the moving shafts 506 is two each. Four telescopic locking parts 508 are arranged between one moving shaft 506 and the outer sleeve 501. And a linear limiting groove 507 for connecting the telescopic locking part 508 and the moving shaft 506 is arranged on the wall surface of the outer sleeve 501. While facilitating the connection, the linear limiting groove 507 also plays a limiting role. The telescopic locking part 508 realizes the telescopic effect through the rotation of the rotating shaft 504. A plurality of groups of telescopic pulley assemblies 502 are also arranged on the outer part of the outer sleeve 501. In this embodiment, the number of the telescopic pulley assemblies 502 is two, and their specific positions are as Figure 3-6 shown.

[0021] It should be noted that the end of the outer sleeve 501 of the first pipe body fixing mechanism 42 is fixedly arranged on the L-shaped hanging rod 40, and the threaded segments 505 of the first pipe body fixing mechanism 42 and the second pipe body fixing mechanism 50 are the same.

[0022] In the preferred solution, the telescopic locking part 508 includes a moving seat 5080, a fixed seat 5081 and a supporting seat 5082. Among them, the moving seat 5080 is arranged on the moving shaft 506, the fixed seat 5081 is arranged on the outer sleeve 501, and the moving seat 5080 and the fixed seat 5081 are collinear. Two symmetric connecting rods 5083 are hinged to the bottom of the supporting seat 5082, and the other ends of the two connecting rods 5083 are respectively hinged to the moving seat 5080 and the fixed seat 5081. An arc-shaped locking plate 5084 is arranged on the supporting seat 5082.

[0023] With such a design, the rotation of the rotating shaft 504 can make the moving shaft 506 linearly move under the limitation of the moving seat 5080 and the linear limiting groove 507, so as to push and pull the supporting seat 5082 and the arc-shaped locking plate 5084 through the hinge of the connecting rod 5083, and then adjust the contact relationship between the arc-shaped locking plate 5084 and the pipe wall, realizing the effect of locking or disengaging from the pipe body. Therefore, the second pipe body fixing mechanism 50 can form a fixed relationship with the installed pipe body 3, and the first pipe body fixing mechanism 42 can form a fixed relationship with the pipe body 1 to be installed, so as to utilize the installed pipe body 3 to provide the supporting force during docking, and the hoisting and docking mechanism 4 can stably hoist the pipe body 1 to be installed.

[0024] In addition, there are multiple telescopic pulley assemblies 502. In the present embodiment, there are four telescopic pulley assemblies 502, which are distributed in a ring outside the outer sleeve 501. The telescopic pulley assembly 502 includes an electric telescopic cylinder 5020, and an axial pulley 5021 is provided on the telescopic end of the electric telescopic cylinder 5020.

[0025] With such a design, the axial pulley 5021 can be used to facilitate the sliding of the lifting and docking mechanism 4 and the built-in pulling mechanism 5 in the tube body. In addition, the axial pulley 5021 can be extended and retracted by the electric telescopic cylinder 5020, so as to adjust the outer diameters between the four axial pulleys 5021 to meet the inner diameters of the tube body 1 to be installed and the installed tube body 3. This makes it easier to position the lifting and docking mechanism 4 when it is inserted into the tube body 1 to be installed, so that it can be inserted in a centered state. At the same time, the axial pulley 5021 that can only slide axially cooperates with the resistance force provided by the electric telescopic cylinder 5020 when it is extended, so as to meet the circumferential support required when the rotating shaft 504 is rotated. A friction plate is provided on the outside of the axial pulley 5021.

[0026] In the preferred embodiment, the rotating shaft 504 of the second tube body fixing mechanism 50 extends to the outside of the docking tube body 2 and is connected to the docking portion 51. The docking portion 51 is a polygonal column with a diameter greater than the rotating shaft 504. In this embodiment, the docking portion 51 is hexagonal, and the diameter of the docking portion 51 is greater than the rotating shaft 504, so a step is formed at the connection between the two.

[0027] The rotating shaft 504 of the first tube body fixing mechanism 42 is a hollow shaft with open ends. The connecting tension component 43 includes a telescopic rod 431 movably plugged into the butt end of the rotating shaft 504. A plurality of sliding key grooves 430 are provided on the inner wall surface of the butt end. In this embodiment, the number of the sliding key grooves 430 is four. The end of the telescopic rod 431 is provided with a sliding key block 432 that slides with the sliding key groove 430, so that it can rotate synchronously with the rotating shaft 504 and can perform telescopic activities at the same time. A telescopic cylinder 434 is also provided in the rotating shaft 504. The telescopic end of the telescopic cylinder 434 is connected to the telescopic rod 431. Therefore, the telescopic rod 431 can be extended and retracted by controlling the extension and retraction of the telescopic cylinder 434. In the present embodiment, the telescopic cylinder 434 is preferably a hydraulic cylinder, and its control pipeline passes through the hollow shaft. The outer end of the telescopic rod 431 is provided with an automatic clamp 433 which can clamp the docking part 51. The automatic clamp 433 can be a pneumatic or hydraulic clamp. The claw body of the automatic clamp 433 is provided with a groove which is adapted to the docking part 51. Therefore, when the claw body is clamped on the outside of the hexagonal docking part 51, it can wrap the step formed by the docking part 51 and the rotating shaft 504, and then use the shape characteristics of the hexagonal shape and the step to form an effective rotation and pulling connection.

[0028] It should be noted that when the docking part 51 is connected to the connecting tensioning component 43, there is a certain distance between the pipe body 1 to be installed and the docking pipe body 2, as Figure 12 shown, which is convenient for the user to observe and control the docking of the two.

[0029] In a preferred solution, the hoisting and docking mechanism 4 includes a driving mechanism 44 for driving the rotation of the rotating shaft 504. The driving mechanism 44 includes a driving device 441 provided at the bottom end of the L-shaped suspension rod 40. The driving device 441 is composed of a motor and a speed reducer transmission combination. A transmission gear 442 is provided on the output shaft of the driving device 441. The end of the rotating shaft 504 passes through the L-shaped suspension rod 40 and is provided with a driven gear 440 meshing with the transmission gear 442. Thus, the rotating shaft 504 can be driven to rotate by the driving device 441. At the same time, when the docking part 51 is connected to the connecting tensioning component 43, the two rotating shafts 504 can be driven to rotate synchronously.

[0030] In a preferred solution, the docking part 51 is rotatably arranged on the rotating shaft 504 of the second pipe body fixing mechanism 50, so as to facilitate the matching of the prism surface posture of the docking part 51 with the claw body of the automatic claw 433.

[0031] A T-shaped mounting hole 510 is provided at the docking end of the rotating shaft 504 of the second pipe body fixing mechanism 50. A jacking hole 511 runs through the T-shaped mounting hole 510. An installation seat 512 that is rotationally matched with the T-shaped mounting hole 510 is provided at the end of the docking part 51. Thus, the circumferential angle adjustment of the docking part 51 is realized by the rotation of the installation seat 512 and the T-shaped mounting hole 510. A plurality of pin holes 514 distributed in a ring shape run through the installation seat 512. A screw nut 515 is installed in the T-shaped mounting hole 510 and any one of the pin holes 514, so as to fix the docking part 51.

[0032] Embodiment 2 Further described in combination with Embodiment 1, as Figure 12-15 shown in the structure, the method includes: S1. Ensure that the built-in tensioning mechanism 5 is located in the installed pipe body 3, and keep the telescopic locking part 508 in a fitting and locking state with the installed pipe body 3, and the docking part 51 thereon is located outside the docking pipe body 2; S2. Complete the hoisting work of the hoisting and docking mechanism 4 by the hoisting equipment, and insert the first pipe body fixing mechanism 42 of the hoisting and docking mechanism 4 into the pipe body 1 to be installed. Before insertion, first adjust the telescopic pulley assembly 502 thereon to be adapted to the inner diameter of the pipe body 1 to be installed, and rotate the rotating shaft 504 after complete insertion so that the telescopic locking part 508 fits with the pipe body 1 to be installed, thereby fixing the pipe body 1 to be installed; S3. Use a lifting device and a hoisting and docking mechanism 4 to hoist the pipe body 1 to be installed to the docking end of the docking pipe body 2. Then, complete the connection of the connection and tensioning component 43 to the docking part 51. Then, cooperate with the lifting device and the tensioning of the connection and tensioning component 43 to complete the docking work of the pipe body 1 to be installed and the docking pipe body 2; S4. Through the connection of the connection and tensioning component 43 to the docking part 51, synchronously rotate the rotating shafts 504 of the first pipe body fixing mechanism 42 and the second pipe body fixing mechanism 50, so that the telescopic locking parts 508 of the first pipe body fixing mechanism 42 and the second pipe body fixing mechanism 50 are in contact and fitting relationship. Then, use the lifting device to pull the hoisting and docking mechanism 4 and the built-in tensioning mechanism 5 outward until the built-in tensioning mechanism 5 is moved into the docking pipe body 2, and after the pipe body 1 to be installed is completely separated from the pipe body 1 to be installed, rotate the rotating shaft 504 again to fix the built-in tensioning mechanism 5 in the docking pipe body 2, and then disconnect the connection between the connection and tensioning component 43 and the docking part 51; S5. Repeat steps S2 - S4 until all pipelines are installed.

[0033] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A large-diameter heavy pipe installation device, comprising a pipe body to be installed (1), a butt-jointed pipe body (2) and an installed pipe body (3), characterized in that: Heavy pipe installation device includes: A lifting docking mechanism (4) is used to lift the pipe body (1) to be installed to the docking end of the docking pipe body (2), and a connecting and pulling assembly (43) is provided on the mechanism; The built-in tensioning mechanism (5) is built into the installed pipe body (3) and extends to the outside of the butt joint end of the butt joint pipe body (2). It can be connected to the connecting tensioning assembly (43) and the butt joint of the pipe body (1) to be installed and the butt joint pipe body (2) is completed through the tensioning of the connecting tensioning assembly (43).

2. A large diameter heavy pipe installation device according to claim 1, characterized in that: The lifting docking mechanism (4) comprises a sideways L-shaped hanging rod (40), a plurality of lifting ears (41) are arranged at the top of the cross beam of the L-shaped hanging rod (40), a first tube body fixing mechanism (42) is arranged at the bottom of the vertical beam of the L-shaped hanging rod (40), the L-shaped hanging rod (40) and the first tube body fixing mechanism (42) form a sideways U-shape, and the length of the first tube body fixing mechanism (42) is greater than the length of the cross beam of the L-shaped hanging rod (40), and a connecting tensioning assembly (43) is arranged at the docking end of the first tube body fixing mechanism (42).

3. According to claim 2, a large diameter heavy pipe installation device is characterized in that: The pulling mechanism (5) comprises a second tube body fixing mechanism (50), and a butt joint portion (51) which can be connected to the connecting pulling assembly (43) is provided at the butt joint end of the second tube body fixing mechanism (50).

4. According to claim 3, a large diameter heavy pipe installation device is characterized in that: the first The tube body fixing mechanism (42) and the second tube body fixing mechanism (50) both comprise an outer sleeve (501), the inner part of the outer sleeve (501) being rotatably provided with a rotating shaft (504) via a bearing (503), the rotating shaft (504) being threadedly sleeved with a corresponding number of moving shafts (506) via a plurality of threaded sections (505) arranged on the outer part thereof, a plurality of annularly distributed telescopic locking portions (508) being arranged between the outer part of the moving shaft (506) and the outer part of the outer sleeve (501), a linear limiting groove (507) for connecting the telescopic locking portion (508) and the moving shaft (506) being arranged on the wall surface of the outer sleeve (501), the telescopic locking portion (508) being able to achieve a telescopic effect through the rotation of the rotating shaft (504), and a plurality of groups of telescopic pulley assemblies (502) being arranged on the outer part of the outer sleeve (501).

5. A large diameter heavy pipe installation device according to claim 4, characterized in that: The telescopic locking portion (508) comprises a movable seat (5080), a fixed seat (5081) and a support seat (5082), wherein the movable seat (5080) is arranged on the movable shaft (506), the fixed seat (5081) is arranged on the outer sleeve (501), and the movable seat (5080) and the fixed seat (5081) are colinear, the bottom of the support seat (5082) is hinged with two symmetrical connecting rods (5083), the other ends of the two connecting rods (5083) are respectively hinged with the movable seat (5080) and the fixed seat (5081), and an arc-shaped locking plate (5084) is arranged on the support seat (5082).

6. The large diameter heavy pipe installation device according to claim 4 is characterized in that: A plurality of telescopic pulley assemblies (502) are provided in a ring-shaped arrangement outside the outer sleeve (501). The telescopic pulley assembly (502) comprises an electric telescopic cylinder (5020). An axial pulley (5021) is provided on the telescopic end of the electric telescopic cylinder (5020).

7. A large diameter heavy pipe installation device according to any one of claims 4 to 6, characterized in that: The rotating shaft (504) of the second tube body fixing mechanism (50) extends to the outside of the butt-jointed tube body (2) and is connected to the butt-jointed portion (51); the butt-jointed portion (51) is a polygonal column having a diameter greater than that of the rotating shaft (504); The rotating shaft (504) of the first tube body fixing mechanism (42) is a hollow shaft with open ends. The connecting tension component (43) includes a telescopic rod (431) movably plugged into the butt end of the rotating shaft (504). A plurality of sliding key slots (430) are provided on the inner wall surface of the butt end. A sliding key block (432) that slidably cooperates with the sliding key slots (430) is provided at the end of the telescopic rod (431). A telescopic cylinder (434) is also provided in the rotating shaft (504). The telescopic end of the telescopic cylinder (434) is connected to the telescopic rod (431). An automatic clamping claw (433) that can clamp the butt end (51) is provided at the outer end of the telescopic rod (431). A groove that matches the butt end (51) is provided on the claw body of the automatic clamping claw (433).

8. The large diameter heavy pipe installation device according to claim 7 is characterized in that: The lifting and docking mechanism (4) comprises a driving mechanism (44) for driving the rotating shaft (504) to rotate, and comprises a driving device (441) arranged at the bottom end of the L-shaped hanging rod (40), a transmission gear (442) being arranged on the output shaft of the driving device (441), and a driven gear (440) meshing with the transmission gear (442) being arranged at the end of the rotating shaft (504) passing through the L-shaped hanging rod (40).

9. The large diameter heavy pipe installation device according to claim 7 is characterized in that: The docking portion (51) is rotatably arranged on the rotating shaft (504) of the second tube body fixing mechanism (50); A T-shaped mounting hole (510) is provided on the butt-jointed end of the rotating shaft (504) of the second tube body fixing mechanism (50), a plug hole (511) is provided through the T-shaped mounting hole (510), a mounting seat (512) rotatably matched with the T-shaped mounting hole (510) is provided at the end of the butt-jointed portion (51), a plurality of annularly distributed pin holes (514) are provided through the mounting seat (512), and a screw nut (515) is installed in the T-shaped mounting hole (510) and any of the pin holes (514).

10. The installation method of a large-diameter heavy pipe installation device according to any one of claims 5 to 9, characterized in that: The method includes: S1, ensuring that the built-in pulling mechanism (5) is located in the installed tube body (3), and the telescopic locking portion (508) is kept in a fitted and locked state with the installed tube body (3), and the docking portion (51) thereon is located outside the docking tube body (2); S2, completing the lifting work of the lifting docking mechanism (4) by the lifting equipment, and inserting the first tube body fixing mechanism (42) of the lifting docking mechanism (4) into the tube body (1) to be installed, before the insertion, adjusting the telescopic pulley assembly (502) thereon to match the inner diameter of the tube body (1) to be installed, and rotating the rotating shaft (504) after the complete insertion so that the telescopic locking part (508) fits with the tube body (1) to be installed, thereby fixing the tube body (1) to be installed; S3, using a lifting device and a lifting docking mechanism (4) to lift the pipe body (1) to be installed to the docking end of the docking pipe body (2), and then completing the connection between the connecting tension component (43) and the docking portion (51), and then completing the docking work between the pipe body (1) to be installed and the docking pipe body (2) by pulling the connecting tension component (43) in coordination with the lifting device; S4, by connecting the tension assembly (43) with the docking portion (51), synchronously rotating the rotating shaft (504) of the first tube body fixing mechanism (42) and the second tube body fixing mechanism (50), so that the telescopic locking portion (508) of the first tube body fixing mechanism (42) and the second tube body fixing mechanism (50) are in contact and fit relationship, and then using a lifting device to pull the hoisting docking mechanism (4) and the built-in tension mechanism (5) outward until the built-in tension mechanism (5) is moved into the docking tube body (2), and after the tube body (1) to be installed is completely separated from the tube body (1), the rotating shaft (504) is rotated again to fix the built-in tension mechanism (5) in the docking tube body (2), and then the connection between the tension assembly (43) and the docking portion (51) is released; S5. Repeat steps S2-S4 until all pipelines are installed.

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