An auxiliary installation pulley for underground pipeline crossing construction

Abstract

This invention discloses an auxiliary installation trolley for underground pipeline crossing construction, relating to the field of pipeline construction technology. The auxiliary installation trolley includes an upper bracket, a lower bracket, and a movable support assembly. The upper and lower brackets are used to clamp and fix a steel pipe. The movable support assembly is located below the lower bracket and is arranged in pairs. Each movable support assembly includes a first support, a main roller, and a side support assembly. The first support is fixedly mounted on the lower bracket, and the main roller is rotatably connected to the first support. The side support assembly includes side rollers and a deployment drive assembly. The output end of the deployment drive assembly is driven by the side rollers. The side rollers are arranged in pairs and symmetrically positioned on the front and rear sides of the main roller along its rolling direction. The output end of the deployment drive assembly is also driven by the main rollers. This auxiliary installation trolley, through the drive of the side rollers by the deployment drive assembly, enables the main roller to descend and rotate simultaneously, removing debris and obstacles.

Description

Technical Field

[0001] This invention belongs to the field of pipeline construction technology, specifically relating to an auxiliary installation pulley for underground pipeline crossing construction. Background Technology

[0002] Pipelines are the primary equipment for transporting liquids or gases, especially over long distances. They enable continuous transport of liquid or gaseous products with high efficiency and stable capacity. To minimize external interference, they are typically buried underground, forming underground pipeline systems. During the construction of underground pipeline projects, it is often necessary to avoid obstacles such as undulating terrain, narrow passages, and the need to protect existing infrastructure. Therefore, underground crossing-type pipeline construction methods are adopted, eliminating the need for excavation and laying pipelines, thus avoiding damage to major transportation routes and basic building facilities.

[0003] The most common trenchless construction method currently available is pipe jacking, with some pipelines having transport distances of up to several hundred meters. If each pipeline uses the traditional pipe jacking process, a large guide rail is used inside the casing to run through the entire pipe section. The guide rail welded inside the casing is difficult to accurately position the elevation and pipe centerline in a confined space, and the long-distance guide rail cannot be removed. Therefore, the installation of steel pipes is difficult and time-consuming, and it is impossible to achieve an economically reasonable and technically feasible construction effect. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary installation pulley with a simple structure and reasonable design for underground pipeline crossing construction in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] An auxiliary installation pulley for underground pipeline crossing construction includes:

[0007] The upper bracket and the lower bracket are used to clamp and fix the steel pipe to be crossed during construction.

[0008] A movable support assembly is disposed below the lower bracket and is arranged in pairs. The movable support assembly includes a first support, a main roller, and a side support assembly. The first support is fixedly disposed on the lower bracket, and the main roller is rotatably connected to the first support. The side support assembly includes a side roller and an unfolding drive assembly. The output end of the unfolding drive assembly is drivenly connected to the side roller. The side rollers are arranged in pairs and are symmetrically arranged on the front and rear sides of the main roller along the rolling direction of the main roller. The output end of the unfolding drive assembly is also drivenly connected to the main roller.

[0009] When the current bracket is in the initial position, the lowest position of the side roller is lower than the lowest position of the main roller;

[0010] When the lower bracket is in the supporting position, the lowest position of the side roller is at the same height as the lowest position of the main roller, and the main roller rotates while descending under the drive of the unfolding drive assembly.

[0011] As a further optimization of the present invention, the unfolding drive assembly includes a swing arm, a first spring, and a rotation drive assembly. One end of the swing arm is rotatably connected to a first support, and the other end of the swing arm is rotatably mounted with a side roller. The end of the swing arm with the side roller is fixedly connected to the first spring, and the other end of the first spring is fixedly connected to the first support. When the lower bracket is in the supporting position, the lowest position of the side roller is at the same height as the lowest position of the main roller, and the distance between the paired side rollers increases. The input end of the rotation drive assembly is drivenly connected to the swing arm, and the output end of the rotation drive assembly is drivenly connected to the main roller. The rotation drive assembly is used to drive the main roller to rotate during the unfolding of the swing arm.

[0012] As a further optimization of the present invention, the rotation drive assembly includes a gear, a rack, and a sleeve. A groove is provided on the first support. The drive shaft of the main roller passes through the groove and is fixedly connected to the gear. The gear meshes with and drives the rack. The rack is slidably connected in the groove. One end of the rack is rotatably connected to the sleeve, and the sleeve is sleeved on the corresponding rocker arm.

[0013] As a further optimization of the present invention, the slide groove is symmetrically arranged about the main roller, and the rotation drive component is correspondingly arranged with the slide groove. Along the rolling direction of the main roller, the side rollers are symmetrically arranged on both sides of the main roller.

[0014] As a further optimization of the present invention, an auxiliary support assembly is also provided on the outer side of the lower bracket. The auxiliary support assembly includes a second support and an auxiliary roller. The second support is fixedly disposed on the outer side of the lower bracket and is located on one side of the first support. The auxiliary roller is rotatably mounted on the second support.

[0015] As a further optimization of the present invention, the auxiliary installation trolley also includes an adjusting support assembly. The adjusting support assemblies are arranged in pairs and are mounted on the upper bracket. The adjusting support assembly includes a secondary roller, a swing arm, and an adjusting reset assembly. A hinge seat is fixedly mounted on the outer side of the upper bracket. One end of the swing arm is rotatably connected to the hinge seat, and the other end of the swing arm is rotatably connected to the secondary roller. The swing arm is inclined in the direction away from the jacking direction of the steel pipe. The output end of the adjusting reset assembly is drivenly connected to one side of the swing arm. The adjusting reset assembly is used to control the tilt angle of the swing arm during the jacking process of the steel pipe until the secondary roller abuts against the inner wall of the sleeve.

[0016] As a further optimization of the present invention, the adjustment and reset assembly includes a connecting rod, a slider, a second spring, and a slide rail. A slide rail is provided on one side of the tilting direction of the swing arm, and the slide rail is fixedly connected to the upper bracket. The slider is slidably connected in the slide rail. A guide rod is fixedly provided in the slide rail, and the guide rod passes through the slider and is slidably connected to the slider. A second spring is sleeved on the guide rod. A connecting rod is rotatably connected to the slider, and the other end of the connecting rod is rotatably connected to the swing arm.

[0017] As a further optimization of the present invention, the upper bracket is fixedly connected to both ends of an upper fixing plate, and the lower bracket is fixedly connected to both ends of a lower fixing plate. The upper fixing plate and the lower fixing plate are correspondingly arranged and are fastened together by bolts. Lifting holes are provided on the upper fixing plate and the lower fixing plate.

[0018] As a further optimization of the present invention, anti-slip pads are respectively provided on the inner sides of the upper bracket and the lower bracket, and a groove is opened on the side of the anti-slip pad facing the center line of the steel pipe, and the extension direction of the groove is consistent with the direction of the center line of the steel pipe.

[0019] As a further optimization of the present invention, the inner sides of the upper bracket and the lower bracket are respectively integrally formed with flanges, and the anti-slip pad is slidably engaged with the flanges.

[0020] The present invention has at least the following beneficial effects: The present invention discloses an auxiliary installation trolley for underground pipeline crossing construction, including an upper bracket, a lower bracket, and a movable support assembly. The movable support assembly is located below the lower bracket. In the initial state, the main roller is lifted off the ground by the support of the pair of side rollers arranged in front and behind the movable support assembly. At this time, the lower bracket can be placed vertically and stably on the ground without human support, which makes it easy to place the hoisted steel pipe on the lower bracket. At this time, driven by the unfolding drive assembly, the main roller moves down and rolls while the side rollers roll in opposite directions. This allows the rolling surface of the rotating main roller to scrape and push the gravel below, pushing the particulate obstacles to one side of the rolling direction of the roller, avoiding the gravel from being crushed by the gravity of the main roller and splashing, which could damage the anti-corrosion coating on the surface of the steel pipe and ensure the anti-corrosion performance of the steel pipe.

[0021] Moreover, when the steel pipe after being clamped and fixed is hoisted to the jacking position, the main roller and the side roller slide with the guide rail respectively, and the lower bracket is also equipped with auxiliary rollers. With the help of the trolley equipped with main roller, side roller and auxiliary roller, the jacking steel pipe is smoothly pushed into the casing, which greatly reduces the jacking resistance of the steel pipe.

[0022] Furthermore, when the selected pulley causes the centerline height of the steel pipe to be lower than that of the casing, the main roller rolls against the inner wall of the casing, while the auxiliary roller disengages from the inner wall of the casing. At this time, the auxiliary roller rolls against the top wall of the casing, thereby constraining the upper bracket. This ensures the relative position of the steel pipes, which are fixed together by the upper and lower brackets, within the casing, thus guaranteeing the jacking and docking accuracy of adjacent steel pipes. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is the invention Figure 1 A schematic diagram of the front structure;

[0025] Figure 3 This is a schematic diagram of the overall structure of the movable support component of the present invention when it is in its initial position;

[0026] Figure 4 This is a side view of the movable support component of the present invention in its initial position;

[0027] Figure 5 This is the invention Figure 3 A schematic diagram of a partial sectional view of the frontal structure;

[0028] Figure 6 This is a side view of the movable support component of the present invention in the unfolded position;

[0029] Figure 7 This is a partial cross-sectional view of the adjustment support assembly, upper bracket, and anti-slip pad of the present invention;

[0030] Figure 8 This is a schematic diagram of the installation structure of the sliding trolley with the steel pipe and sleeve in a coaxial state according to the present invention;

[0031] Figure 9 This is a schematic diagram of the installation structure of the trolley under different axial states of the steel pipe and sleeve of the present invention.

[0032] In the diagram: 1. Upper bracket; 11. Upper fixing plate; 12. Flange;

[0033] 2. Lower bracket; 21. Lower fixing plate;

[0034] 3. Auxiliary support components; 31. Reinforcing ribs; 32. Second support; 33. Auxiliary rollers;

[0035] 4. Moving support assembly; 41. Main roller; 42. First support; 43. Side support assembly; 431. Gear; 432. Rack; 433. Rocker arm; 434. Side roller; 435. First spring; 436. Sleeve; 437. Slide groove;

[0036] 5. Adjustable support assembly; 51. Slide rail; 52. Guide rod; 53. Slider; 54. Second spring; 55. Connecting rod; 56. Swing arm; 57. Hinge seat; 58. Secondary roller;

[0037] 6. Anti-slip mat; 61. Groove. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0039] like Figure 1 , Figure 2 and Figure 8 As shown, the present invention provides an auxiliary installation pulley for underground pipeline crossing construction, comprising:

[0040] Upper bracket 1 and lower bracket 2 are used to clamp and fix the steel pipe to be crossed during construction.

[0041] A movable support assembly 4 is disposed below the lower bracket 2 and is arranged in pairs. The movable support assembly 4 includes a first support 42, a main roller 41, and a side support assembly 43. The first support 42 is fixedly disposed on the lower bracket 2, and the main roller 41 is rotatably mounted on the first support 42. The side support assembly 43 includes a side roller 434 and an unfolding drive assembly. The output end of the unfolding drive assembly is drivenly connected to the side roller 434. The side rollers 434 are arranged in pairs and are symmetrically arranged on the front and rear sides of the main roller 41 along the rolling direction of the main roller 41. The output end of the unfolding drive assembly is also drivenly connected to the main roller 41.

[0042] When the current bracket 2 is in the initial position, the lowest position of the side roller 434 is lower than the lowest position of the main roller 41;

[0043] When the lower bracket 2 is in the supporting position, the lowest position of the side roller 434 is at the same height as the lowest position of the main roller 41, and the main roller 41 rotates while descending under the drive of the unfolding drive assembly.

[0044] It should be noted that the rolling direction of the main roller 41 is the same as the moving direction of the steel pipe when it is pushed in. For example, Figure 8 As shown, the dashed lines inside the pulley simply indicate the placement of the steel pipe, while the dashed lines outside the pulley simply indicate the placement of the sleeve. At this point, the steel pipe is held and fixed in the pulley by the upper bracket 1 and the lower bracket 2. With the help of the external jacking mechanism, the pulley drives the steel pipe to be pushed forward along the sleeve's channel. (Continue to refer to...) Figure 8 The bottom end face of the paired main rollers 41 abuts against the inner wall of the sleeve, so that the axis of the steel pipe is consistent with the axis of the sleeve. In the subsequent jacking operation of the steel pipe, the uniform height of the pulley can be used to keep the axis of multiple steel pipes consistent and achieve precise docking between adjacent steel pipes, ensuring installation accuracy.

[0045] In the above embodiment, before the steel pipe is inserted into the casing, the pulley needs to be fixed to the outside of the target steel pipe on the ground. Therefore, the lower support 2 is placed vertically and statically on the ground by the paired side rollers 434, and kept in balance to prevent the lower support 2 from tipping over when the steel pipe is placed. At this time, the main roller 41 is lifted off the ground, and then the target steel pipe is lifted to the upper part of the lower support 2 by a crane. At this time, under the action of the steel pipe's own weight, the lower support 2 is pressed down, and the side rollers 434 symmetrically arranged on the front and rear sides of the main roller 41 roll in opposite directions, that is, the two roll in opposite directions, until the lowest position of the main roller 41 contacts the ground. At this time, the lowest position of the side rollers 434 is in line with the ground. The lowest point of the main roller 41 is at the same height, and under the drive of the deployment drive assembly, the main roller 41 descends and rotates at the same time, so that the main roller 41 moves forward in a rotating state. The rolling surface of the rotating main roller 41 can scrape and push the gravel below, pushing the particulate obstacles to one side of the rolling direction of the main roller 41, avoiding the gravel from being crushed by the gravity of the main roller 41 and splashing, which would damage the anti-corrosion coating on the surface of the steel pipe, ensuring the anti-corrosion performance of the steel pipe and extending the service life of the steel pipe. Moreover, as the main roller 41 rotates and moves downward, the sliding friction between it and obstacles such as gravel on the ground is converted into rolling friction, thereby reducing the wear of the main roller 41.

[0046] It should be noted that each steel pipe requires at least two pulleys, with multiple pulleys evenly distributed along the pipe's axis. During the jacking process, only guide rails need to be installed on the outside of the sleeve, allowing the main roller 41 and side roller 434 to roll into the sleeve along these rails, significantly reducing the resistance during jacking. No guide rails are needed inside the sleeve, greatly reducing economic and time costs. Furthermore, the main roller 41 and side roller 434 are matched to the guide rails to prevent them from derailing while moving along the rails.

[0047] For example, see [link to relevant documentation]. Figure 1 and Figure 2 The upper bracket 1 has upper fixing plates 11 fixedly connected to both ends, and the lower bracket 2 has lower fixing plates 21 fixedly connected to both ends. The upper fixing plates 11 and lower fixing plates 21 are correspondingly arranged and are fastened together by bolts, thereby fixing the target steel pipe between the upper bracket 1 and the lower bracket 2. The upper fixing plates 11 and lower fixing plates 21 are provided with lifting holes so that the rope end of the lifting equipment can be tied in the lifting hole to lift the target steel pipe and apply the lifting force to the pulley. During the lifting process, the rope will not be misaligned, and the steel pipe will be lifted steadily.

[0048] Continue reading Figure 3 and Figure 4 The unfolding drive assembly includes a swing arm 433, a first spring 435, and a rotation drive assembly. One end of the swing arm 433 is rotatably connected to a first support 42, and the other end of the swing arm 433 is rotatably mounted with a side roller 434. The first spring 435 is fixedly connected to one end of the swing arm 433 with the side roller 434, and the other end of the first spring 435 is fixedly connected to the first support 42. When the lower bracket 2 is in the supporting position, the lowest point of the side roller 434 is at the same height as the lowest point of the main roller 41. Figure 6 As shown, the distance between the paired side rollers 434 increases. The input end of the rotation drive assembly is connected to the swing arm 433, and the output end of the rotation drive assembly is connected to the main roller 41. The rotation drive assembly is used to drive the main roller 41 to rotate during the unfolding of the swing arm 433.

[0049] Continue reading Figure 6 After the steel pipe is placed on the lower bracket 2, the lower bracket 2 drives the main roller 41 from Figure 4 The position shown has been moved down to Figure 6 As shown, the movable support assembly 4 is in the unfolded position. At this time, the included angle between the paired swing rods 433 increases, which increases the distance between the paired side rollers 434. The first spring 435 is stretched and deformed, so that during the downward movement of the main roller 41, the deformation of the first spring 435 buffers the downward movement of the steel pipe carried on the lower bracket 2, ensuring the stable placement of the steel pipe. In the subsequent process of the steel pipe being pushed into the sleeve, with the help of the multiple supports and rolling movements of the side rollers 434 and the main roller 41, the construction of the steel pipe is carried out smoothly while greatly reducing the resistance of the steel pipe being pushed in.

[0050] Continue reading Figure 3 , Figure 4 and Figure 5The rotation drive assembly includes a gear 431, a rack 432, and a sleeve 436. A groove 437 is provided on the first support 42. The drive shaft of the main roller 41 passes through the groove 437 and is fixedly connected to the gear 431. The gear 431 meshes with the rack 432, which is slidably connected in the groove 437. One end of the rack 432 is rotatably connected to the sleeve 436, which is sleeved on the corresponding rocker arm 433.

[0051] like Figure 3 As shown, rack 432 meshes above gear 431. When the steel pipe is placed on the lower bracket 2, as the included angle of the paired rocker arms 433 gradually increases, the rocker arms 433 drive rack 432 to move to the left via sleeve 436. Figure 4 Taking the indicated orientation as an example, rack 432 meshes with transmission gear 431, causing gear 431 to drive main roller 41 to rotate counterclockwise, thus achieving simultaneous downward movement and rotation of main roller 41. In other embodiments, rack 432 may mesh below gear 431. When sleeve 436 drives the left end of rack 432 to move to the left, gear 431 rotates clockwise, achieving simultaneous downward movement and clockwise rotation of main roller 41. This is not limited to this specific embodiment. It should be noted that when main roller 41 touches the ground, rack 432 disengages from gear 431. The rotation of main roller 41 continues by its own inertia to push away the gravel obstacle. At this time, when main roller 41 rolls back and forth to move the trolley, it is not constrained by the meshing of rack 432 and gear 431.

[0052] Among them, such as Figure 3 and Figure 5 As shown, the slide 437 is symmetrically arranged about the main roller 41, and the rotation drive assembly is correspondingly arranged with the slide 437. Along the rolling direction of the main roller 41, the side rollers 434 are symmetrically arranged on both sides of the main roller 41, that is, the final main roller 41 is equipped with four side rollers 434, so that when the lower bracket 2 is in the initial position, it is kept vertically and stably placed.

[0053] Continue reading Figure 1 and Figure 2 An auxiliary support assembly 3 is also provided on the outer side of the lower bracket 2. The auxiliary support assembly 3 includes a second support 32 and an auxiliary roller 33. The second support 32 is fixedly disposed on the outer side of the lower bracket 2 and is located on one side of the first support 42. The auxiliary roller 33 is rotatably mounted on the second support 32. Figure 2 As shown, the sides of the first support 42 and the second support 32 are both fixedly provided with reinforcing ribs 31, which are fixedly connected to the lower bracket 2 to enhance the connection stability between the first support 42, the second support 32 and the lower bracket 2.

[0054] Continue reading Figure 8 When the steel pipe is pushed into the casing, the selected pulley makes the axis of the steel pipe coincide with the axis of the casing. With the help of the auxiliary roller 33 rolling against the inner wall of the casing, the resistance of the steel pipe being pushed into the casing by the pulley is fully reduced.

[0055] For example, see [link to relevant documentation]. Figure 1 , Figure 7 and Figure 8 The auxiliary installation trolley also includes an adjusting support assembly 5, which is arranged in pairs. The adjusting support assembly 5 is mounted on the upper bracket 1 and includes a secondary roller 58, a swing arm 56, and an adjusting and resetting assembly. A hinge seat 57 is fixedly mounted on the outer side of the upper bracket 1. One end of the swing arm 56 is rotatably connected to the hinge seat 57, and the other end of the swing arm 56 is rotatably connected to the secondary roller 58. The swing arm 56 is inclined away from the jacking direction of the steel pipe. Figure 7 As shown, the direction from left to right indicates the direction in which the steel pipe is pushed in. One side of the swing arm 56 is connected to the output end of an adjustment and reset assembly. This assembly controls the tilt angle of the swing arm 56 during the pushing process, until the auxiliary roller 58 abuts against the inner wall of the sleeve. Figure 8 As shown, the position between the upper bracket 1 and the sleeve is constrained by the auxiliary roller 58, and the position between the lower bracket 2 and the sleeve is constrained by the main roller 41, so as to fully ensure that the axial height of the steel pipe remains consistent when it is pushed in.

[0056] In other embodiments, if the selected trolley radius is small, such that the centerline of the supported steel pipe is lower than the centerline of the sleeve, when the steel pipe is pushed into the sleeve, the main roller 41 rolls against the inner wall of the sleeve, while the auxiliary roller 33 disengages from the inner wall of the sleeve. At this time, under the action of the adjustment and reset assembly, the tilt angle of the swing arm 56 is adjusted until the auxiliary roller 58 rolls against the top wall of the sleeve, so as to stably constrain the steel pipe in the sleeve.

[0057] Among them, such as Figure 7 As shown, the adjustment and reset assembly includes a connecting rod 55, a slider 53, a second spring 54, and a slide rail 51. The slide rail 51 is provided on one side of the tilting direction of the swing arm 56. The slide rail 51 is fixedly connected to the upper bracket 1. The slider 53 is slidably connected in the slide rail 51. A guide rod 52 is fixedly provided in the slide rail 51. The guide rod 52 passes through the slider 53 and is slidably connected to the slider 53. The second spring 54 is sleeved on the guide rod 52. The connecting rod 55 is rotatably connected to the slider 53. The other end of the connecting rod 55 is rotatably connected to the swing arm 56. Under the action of the second spring 54, the slider 53 adjusts the tilt angle of the swing arm 56 through the connecting rod 55.

[0058] For example, see [link to relevant documentation]. Figure 1 and Figure 2The upper bracket 1 and the lower bracket 2 are respectively provided with anti-slip pads 6 on their inner sides. The anti-slip pads 6 have a groove 61 on the side facing the center line of the steel pipe. The extension direction of the groove 61 is consistent with the direction of the center line of the steel pipe.

[0059] And continue to consult Figure 7 The upper bracket 1 and the lower bracket 2 are integrally formed with flanges 12 on their inner sides, and the anti-slip pads 6 are slidably engaged with the flanges 12. The two anti-slip pads 6 are respectively fed into the upper bracket 1 and the lower bracket 2 along the flanges 12, such that the inner surface of one anti-slip pad 6 protrudes to the inner surface of the upper bracket 1, and the inner surface of the other anti-slip pad 6 protrudes to the inner surface of the lower bracket 2. Therefore, when the upper bracket 1 and the lower bracket 2 clamp and fix the steel pipe, the inner surface of the anti-slip pad 6 is pressed and adhered to the steel pipe, preventing the upper bracket 1 and the lower bracket 2 of the steel structure from directly contacting the surface of the steel pipe. This prevents the metal structure from scratching or breaking the anti-corrosion layer on the surface of the steel pipe during clamping and jacking, thus ensuring the anti-corrosion performance of the steel pipe and extending its service life. Furthermore, the increased friction between the anti-slip pad 6 and the surface of the steel pipe promotes synchronous forward movement of the entire trolley through the anti-slip pad 6 during jacking.

[0060] It should be noted that when using the auxiliary installation trolley for underground pipeline crossing construction, multiple lower brackets 2 are evenly distributed along the axis of the steel pipe. At this time, the main roller 41 is separated from the ground, and the multiple side rollers 434 corresponding to the main roller 41 abut against the ground, so that the lower bracket 2 remains vertically and stably placed.

[0061] The steel pipe is lifted and placed on the lower support 2 by the lifting equipment. Under the action of the steel pipe's own weight, the lower support 2 drives the main roller 41 to move down synchronously. At this time, along the rolling direction of the main roller 41, the paired side rollers 434 roll in opposite directions, and the included angle between the front and rear swing rods 433 increases. The swing rods 433 drive the rack 432 to move through the sleeve 436, so that the rack 432 meshes with the gear 431 to rotate. At this time, the main roller 41 moves down and rotates at the same time. Thus, before the main roller 41 contacts the ground, the rolling surface of the rotating main roller 41 can scrape and push the gravel below, pushing the particle obstacles to one side of the rolling direction of the roller, avoiding the gravel from being crushed by the gravity of the main roller 41 and splashing, which would damage the anti-corrosion coating on the surface of the steel pipe, ensuring the anti-corrosion performance of the steel pipe and extending the service life of the steel pipe.

[0062] Then, the upper bracket 1 is placed on the lower bracket 2, and the upper fixing plate 11 and the lower fixing plate 21 are fixedly connected together with fastening bolts, thereby installing the upper bracket 1 and the lower bracket 2 together to clamp and fix the steel pipe. Then, the steel pipe with the trolley installed is lifted onto the guide rail with the lifting equipment, so that the main roller 41 slides with the guide rail. Under the action of the jacking equipment, the main roller 41 and the side roller 434 roll into the sleeve, so that the centerline height of the steel pipe is consistent. During the jacking process, the rolling of the main roller 41 and the side roller 434 greatly reduces the jacking resistance of the steel pipe. In the subsequent jacking of multiple steel pipes, since the centerline height of the steel pipes is consistent, the docking accuracy between adjacent steel pipes is guaranteed.

[0063] An auxiliary roller 33 is also provided on one side of the main roller 41, such as... Figure 8 As shown, when the selected pulley makes the centerline height of the steel pipe coincide with the centerline height of the casing, the main roller 41 and the auxiliary roller 33 provide rolling support to the inner wall of the casing, ensuring the smooth advancement of the steel pipe and the fixation of the relative position between the steel pipe and the casing.

[0064] Furthermore, an adjustment support assembly 5 is provided above the upper bracket 1. During the process of the steel pipe being pushed into the sleeve, the auxiliary roller 58 is used to abut against the inner top wall of the sleeve, and the swing arm 56 tilts. The auxiliary roller 58 is used to further constrain the relative position between the sleeve and the steel pipe, which fully ensures the jacking accuracy of the steel pipe. When the selected pulley size makes the height of the steel pipe's axis line lower than the height of the sleeve's axis line, the auxiliary roller 58 is used to constrain the relative position between the sleeve and the steel pipe when the auxiliary roller 33 is disengaged from the inner wall of the sleeve, ensuring the jacking accuracy and smooth movement of the steel pipe.

[0065] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An auxiliary installation pulley for underground pipeline crossing construction, characterized in that, include: The upper bracket (1) and the lower bracket (2) are used to clamp and fix the steel pipe to be crossed during construction. A movable support assembly (4) is provided below the lower bracket (2) and the movable support assemblies (4) are arranged in pairs. The movable support assembly (4) includes a first support (42), a main roller (41) and a side support assembly (43). The first support (42) is fixedly provided on the lower bracket (2). The main roller (41) is rotatably connected to the first support (42). The side support assembly (43) includes a side roller (434) and an unfolding drive assembly. The output end of the unfolding drive assembly is drivenly connected to the side roller (434). The side rollers (434) are arranged in pairs and are symmetrically arranged on the front and rear sides of the main roller (41) along the rolling direction of the main roller (41). The output end of the unfolding drive assembly is also drivenly connected to the main roller (41). When the current bracket (2) is in the initial position, the lowest position of the side roller (434) is lower than the lowest position of the main roller (41); When the lower bracket (2) is in the supporting position, the lowest position of the side roller (434) is at the same height as the lowest position of the main roller (41), and under the drive of the unfolding drive assembly, the main roller (41) rotates while descending; The unfolding drive assembly includes a swing arm (433), a first spring (435), and a rotation drive assembly. One end of the swing arm (433) is rotatably connected to the first support (42), and the other end of the swing arm (433) is rotatably mounted with a side roller (434). The end of the swing arm (433) with the side roller (434) is fixedly connected to the first spring (435), and the other end of the first spring (435) is fixedly connected to the first support (42). When the lower bracket (2) is in the supporting position, the lowest position of the side roller (434) is at the same height as the lowest position of the main roller (41), and the distance between the paired side rollers (434) increases. The input end of the rotation drive assembly is connected to the swing arm (433) in a transmission connection, and the output end of the rotation drive assembly is connected to the main roller (41) in a transmission connection. The rotation drive assembly is used to drive the main roller (41) to rotate during the unfolding process of the swing arm (433).

2. The auxiliary installation pulley for underground pipeline crossing construction according to claim 1, characterized in that, The rotation drive assembly includes a gear (431), a rack (432), and a sleeve (436). A groove (437) is provided on the first support (42). The drive shaft of the main roller (41) passes through the groove (437) and is fixedly connected to the gear (431). The gear (431) meshes with the rack (432). The rack (432) is slidably connected in the groove (437). One end of the rack (432) is rotatably connected to the sleeve (436). The sleeve (436) is sleeved on the corresponding rocker arm (433).

3. The auxiliary installation pulley for underground pipeline crossing construction according to claim 2, characterized in that, The slide groove (437) is symmetrically arranged about the main roller (41), and the rotation drive assembly is correspondingly arranged with the slide groove (437). Along the rolling direction of the main roller (41), the side rollers (434) are symmetrically arranged on both sides of the main roller (41).

4. The auxiliary installation pulley for underground pipeline crossing construction according to claim 3, characterized in that, An auxiliary support assembly (3) is also provided on the outer side of the lower bracket (2). The auxiliary support assembly (3) includes a second support (32) and an auxiliary roller (33). The second support (32) is fixedly provided on the outer side of the lower bracket (2) and is located on one side of the first support (42). The auxiliary roller (33) is rotatably mounted on the second support (32).

5. The auxiliary installation pulley for underground pipeline crossing construction according to claim 4, characterized in that, The auxiliary installation trolley also includes an adjustment support assembly (5). The adjustment support assemblies (5) are arranged in pairs. The adjustment support assembly (5) is set on the upper bracket (1). The adjustment support assembly (5) includes a secondary roller (58), a swing arm (56) and an adjustment reset assembly. A hinge seat (57) is fixedly arranged on the outer side of the upper bracket (1). One end of the swing arm (56) is rotatably connected to the hinge seat (57), and the other end of the swing arm (56) is rotatably connected to the secondary roller (58). The swing arm (56) is inclined in the direction away from the steel pipe. The output end of the adjustment reset assembly is connected to one side of the swing arm (56). The adjustment reset assembly is used to control the tilt angle of the swing arm (56) during the steel pipe jacking process until the secondary roller (58) abuts against the inner wall of the sleeve.

6. The auxiliary installation pulley for underground pipeline crossing construction according to claim 5, characterized in that, The adjustment and reset assembly includes a connecting rod (55), a slider (53), a second spring (54), and a slide rail (51). The slide rail (51) is provided on one side of the tilt direction of the swing arm (56). The slide rail (51) is fixedly connected to the upper bracket (1). The slider (53) is slidably connected in the slide rail (51). A guide rod (52) is fixedly provided in the slide rail (51). The guide rod (52) passes through the slider (53) and is slidably connected to the slider (53). The second spring (54) is sleeved on the guide rod (52). The connecting rod (55) is rotatably connected to the slider (53). The other end of the connecting rod (55) is rotatably connected to the swing arm (56).

7. The auxiliary installation pulley for underground pipeline crossing construction according to claim 1, characterized in that, The upper bracket (1) is fixedly connected to the two ends of the upper bracket (1) and the lower bracket (2) is fixedly connected to the two ends of the lower bracket (2). The upper fixing plate (11) and the lower fixing plate (21) are arranged correspondingly and are fastened together by bolts. Lifting holes are provided on the upper fixing plate (11) and the lower fixing plate (21).

8. The auxiliary installation pulley for underground pipeline crossing construction according to claim 1, characterized in that, The inner sides of the upper bracket (1) and the lower bracket (2) are respectively provided with anti-slip pads (6). The anti-slip pads (6) have grooves (61) on the side facing the center line of the steel pipe. The extension direction of the grooves (61) is consistent with the direction of the center line of the steel pipe.

9. The auxiliary installation pulley for underground pipeline crossing construction according to claim 8, characterized in that, The inner sides of the upper bracket (1) and the lower bracket (2) are respectively integrally formed with flanges (12), and the anti-slip pad (6) is slidably engaged with the flanges (12).

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