Steel pipe jacking intermediate joint

Abstract

The utility model relates to road administration construction technical field, especially a kind of steel pipe jacking relay station, including sleeve assembly and the support structure being set in the middle part of sleeve assembly, support structure includes variable diameter subassembly and telescopic piece, variable diameter subassembly is respectively set in the both ends of telescopic piece, variable diameter subassembly includes support ring, several adjusting parts and top plate, adjusting part is evenly distributed in the side of support ring, the one end of adjusting part is connected with top plate, adjusting part can move with the radial direction of support ring to the axis of support ring, so that multiple top plate abuts or separates from the inner wall of sleeve assembly. In the utility model, diamond telescopic frame design allows adjusting part to move flexibly in radial direction, so as to adapt to pipe of different diameters, improve the versatility of equipment, through the radial adjustment of variable diameter subassembly, top plate can quickly abut or separate from pipe inner wall, without complex hoisting and fixing, reduce construction time and labor cost.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, and in particular to a steel pipe jacking relay station. Background Technology

[0002] Pipe jacking, a trenchless construction technique, is one of the core construction methods for urban underground pipe networks (such as stormwater and sewage pipes, integrated pipe corridors, and water supply pipelines). In long-distance or curved pipe jacking projects, the frictional resistance between the pipe and the ground accumulates with the jacking distance, and a single main jacking device cannot provide sufficient jacking force. In this case, one or more intermediate stations must be set up in the middle of the pipe. The intermediate station is equivalent to a "relay station," which provides auxiliary jacking force to subsequent pipe sections through the hydraulic cylinder group arranged inside, thereby realizing segmented jacking.

[0003] Traditional relay stations typically consist of a front housing, a rear housing, an equalizing ring (road plate), and multiple circumferentially distributed relay station cylinders. Their working principle is as follows: the rear end of each cylinder is supported on the rear housing (where the pipe has already been pushed in), while the front end pushes the front housing and subsequent pipes forward. After completing one pushing operation, each cylinder needs to be retracted, its front and rear support structures removed, and then reinstalled in a new position—a cumbersome process.

[0004] Within the confined space of the pipeline, workers first need to position and secure the front and rear road panels. Then, they use lifting equipment (such as a hand-operated hoist) to hoist the heavy hydraulic cylinders one by one to their designed positions. These cylinders are then connected to the road panels using pins or bolts. Finally, the hydraulic pipelines are installed and tested. Because the inside of the pipeline is a closed and narrow space, the process of hoisting heavy objects (hydraulic cylinders and road panels) is time-consuming and carries multiple risks, including mechanical injury, falling objects, and falls from heights. Furthermore, poor ventilation and insufficient lighting further exacerbate the safety hazards. Utility Model Content

[0005] In view of the technical problems existing in the background art, the utility model provides a steel pipe jacking relay room to solve the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: A steel jacking relay station includes a casing assembly and a support structure disposed in the middle of the casing assembly. The support structure includes a diameter-changing assembly and a telescopic component. The diameter-changing assembly is disposed at both ends of the telescopic component. The diameter-changing assembly includes a support ring, a plurality of adjusting components, and a top plate. The adjusting components are evenly distributed on one side of the support ring. One end of the adjusting component is connected to the top plate. The adjusting component can move radially toward the support ring about the axis of the support ring, thereby causing the plurality of top plates to abut against or disengage from the inner wall of the casing assembly.

[0007] Preferably, the adjusting component is a diamond-shaped telescopic frame formed by multiple connecting rods connected to each other through hinge points at both ends.

[0008] Preferably, there are at least two support rings, which are coaxially spaced apart. Several support shafts are evenly distributed on the support rings, and the support shafts connect the two support rings. One end of the adjusting member is hinged to the support shaft.

[0009] Preferably, a connecting shaft is provided on the top plate, and one end of the adjusting member is hinged to the connecting shaft.

[0010] Preferably, each of the two sides of the adjusting member is provided with a side shaft, and the two sides of the adjusting member are respectively hinged to the side shaft. A driving member is provided between adjacent adjusting members, and the two ends of the driving member are respectively hinged to the side shafts of the two adjusting members.

[0011] Preferably, the variable diameter assembly also includes a limiting member, which is disposed on one side of the support ring. The limiting member includes a limiting rod, and a limiting channel composed of two plates is provided on one side of the top plate. The limiting rod is disposed in the limiting channel.

[0012] Preferably, the extension direction of the limiting channel is parallel to the radial movement direction of the top plate, and the limiting rod has a T-shaped structure with its end forming a sliding fit with the limiting channel.

[0013] Preferably, the sleeve assembly includes an outer sleeve and an inner sleeve, the inner sleeve being slidable along the axial direction of the outer sleeve, wherein one set of reducing assemblies is connected to the outer sleeve and another set of reducing assemblies is connected to the inner sleeve.

[0014] This utility model has the following advantages and beneficial effects: The diamond-shaped telescopic frame design allows the adjusting components to move flexibly in the radial direction, thereby adapting to pipes of different diameters and improving the versatility of the equipment. Through the radial adjustment of the diameter-changing components, the top plate can quickly abut against or detach from the inner wall of the pipe without the need for complex hoisting and fixing, reducing construction time and labor costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation position of a steel jacking pipe relay station proposed in this utility model; Figure 2 This is a schematic diagram of the working state of a steel jacking pipe relay station proposed in this utility model; Figure 3 This is a schematic diagram of a support structure for a steel jacking pipe relay station proposed in this utility model; Figure 4 This utility model provides a structural diagram of a support ring between steel jacking pipe relay stations. Figure 5This is a schematic diagram of the support structure for an unconnected drive component in a steel jacking pipe relay station according to the present invention. Figure 6 This is a structural diagram of a driving component for a steel jacking pipe relay station proposed in this utility model; Figure 7 This is a schematic diagram of the contracted state of the support structure of a steel jacking pipe relay station proposed in this utility model; Figure 8 This is a schematic diagram of the open state of the support structure of a steel jacking pipe relay station proposed in this utility model.

[0016] Reference numerals: 10-outer sleeve, 101-stepped groove, 11-inner sleeve, 20-expansion joint, 30-support ring, 31-adjusting component, 32-top plate, 33-support shaft, 34-connecting shaft, 35-side shaft, 40-driving component, 41-side shaft, 50-limiting rod, 51-limiting channel, 60-concrete pipe. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Example like Figures 1-2 As shown, a steel pipe jacking relay station includes a sleeve assembly and a support structure disposed in the middle of the sleeve assembly. The sleeve assembly consists of an outer sleeve 10 and an inner sleeve 11. Both the outer sleeve 10 and the inner sleeve 11 are cylindrical structures made of high-strength steel. The inner sleeve 11 is fitted inside the outer sleeve 10, and a gap is left between the outer wall of the inner sleeve 11 and the inner wall of the outer sleeve 10 to allow the inner sleeve 11 to slide along the axial direction of the outer sleeve 10. During pipe jacking construction, the outer sleeve 10 is connected to the already jacked concrete pipe 60, and the inner sleeve 11 is connected to the concrete pipe 60 to be jacked, forming a continuous jacking system.

[0020] like Figures 1-3As shown, the support structure is located inside the outer sleeve 10 and the inner sleeve 11. The support structure includes a telescopic member 20 and two sets of diameter-changing assemblies. The telescopic member 20 is a hydraulic cylinder, with its cylinder body connected to one end of the diameter-changing assembly and its piston rod connected to the other end. The telescopic member 20 can extend and retract axially, thereby pushing or pulling the diameter-changing assembly to achieve the jacking operation. The hydraulic cylinder is controlled by an external hydraulic system to provide a stable jacking force.

[0021] like Figures 1-5 , Figure 7 , Figure 8 As shown, the variable diameter assembly includes a limiting component, a support ring 30, several adjusting components 31, and a top plate 32. The support ring 30 is a circular ring structure made of forged steel, which has high strength and rigidity. There are at least two support rings 30, which are coaxially spaced. The support rings 30 are connected by several support shafts 33. The support shafts 33 are evenly distributed on the support rings 30 to ensure uniform force distribution. The two ends of the support shafts 33 are fixed to the support rings 30 by welding to form a stable frame structure.

[0022] The adjusting member 31 is a diamond-shaped telescopic frame formed by multiple connecting rods connected to each other through hinge points at both ends. Each adjusting member 31 includes a diamond-shaped unit, which is formed by four connecting rods hinged together, so that the adjusting member 31 can extend and retract in the radial direction. One end of the adjusting member 31 is hinged to the support shaft 33. Specifically, the end connecting rod of the adjusting member 31 is provided with a hinge hole and is hinged to the support shaft 33, allowing the adjusting member 31 to rotate around the support shaft 33. The number of adjusting members 31 corresponds to the support shaft 33 and is evenly distributed on one side of the two support rings 30.

[0023] The top plate 32 is a plate with an arc-shaped end, the curvature of which matches the inner wall of the sleeve assembly. The top plate 32 is made of pressed steel plate, and a connecting shaft 34 is provided on the inner side of the top plate 32. The connecting shaft 34 is a short shaft and is welded to the top plate 32. The other end of the adjusting member 31 is hinged to the connecting shaft 34, so that when the adjusting member 31 extends or retracts, the top plate 32 can move radially to abut or disengage from the inner wall of the sleeve assembly.

[0024] like Figure 1-8As shown, side shafts 35 are respectively provided on both sides of the adjusting member 31. The side shafts 35 are short shafts. The adjusting member 31 and the side shafts 35 are hinged together. A driving member 40 is provided between adjacent adjusting members 31. The driving member 40 is a hydraulic cylinder. Its cylinder body is hinged to the side shaft 41 of one adjusting member 31, and its piston rod is hinged to the side shaft 41 of the adjacent adjusting member 31. Specifically, a ring structure is provided at the end of the cylinder body of the driving member 40. The ring of the cylinder body is sleeved on the side shaft 41 and will not fall off the side shaft 41. The piston rod of the driving member 40 is also provided with a ring structure. The ring on the piston rod is sleeved on another side shaft 41. When the driving member 40 extends or retracts, it pushes or pulls the adjusting member 31, causing the adjusting member 31 to expand or contract in the radial direction, thereby driving the top plate 32 to move. Several driving members 40 are synchronously controlled by an external hydraulic cylinder system to ensure that all top plates 32 move synchronously.

[0025] A limiting component is provided on one side of the support ring 30. The limiting component includes a limiting rod 50, which is a T-shaped structure. Its base is fixed to the support ring 30 by bolts or welding, and its end is a T-shaped head. A limiting channel 51 composed of two plates is provided on one side of the top plate 32. The limiting channel 51 is formed by welding two parallel steel plates onto the top plate 32, and its extension direction is parallel to the radial movement direction of the top plate 32. The T-shaped head of the limiting rod 50 is set in the limiting channel 51 to form a sliding fit. When the top plate 32 moves radially, the limiting channel 51 slides along the limiting rod 50. It should be noted that at least two sets of limiting channels 51 are provided on a top plate 32 to ensure the stability of the top plate 32's movement and prevent rotation or tilting.

[0026] It should be noted that an annular stepped groove 101 is provided at the pipe opening of the outer sleeve 10. This stepped groove 101 is a radially recessed structure. When the reducing assembly moves to simultaneously open the top plate 32, the top plate 32 of the reducing assembly connected to the outer sleeve 10 can precisely abut and connect to this stepped groove 101. This design ensures that the outer sleeve 10 and the inner sleeve 11 have the same effective inner diameter at the connection point of the top plate 32. Furthermore, several reinforcing ribs are provided at the connection point between the outer sleeve 10 and the concrete pipe 60, and the same applies to the inner sleeve 11. This increases the overall strength of the relay station and prevents the outer sleeve 10 and the inner sleeve 11 from breaking during the process of pushing the concrete pipe 60.

[0027] In operation, the steel jacking relay of this invention achieves rapid positioning and support through the radial adjustment of the diameter-changing assembly. Initially, the drive component 40 and the adjusting component 31 are in a retracted state, with the top plate 32 maintaining a gap with the inner wall of the pipe. First, the hydraulic system controls the drive component 40 to extend synchronously, pushing the side shaft 35 of the adjacent adjusting component 31 away from the center of the support ring 30. Since the adjusting component 31 is a diamond-shaped telescopic frame formed by connecting rods, under the thrust of the drive component 40, the adjusting component 31 generates radial expansion motion with the support shaft 33 as the fulcrum, driving the top plate 32 to move smoothly towards the inner wall of the pipe along the guide of the limiting groove 51 until the arc-shaped working surfaces of all the top plates 32 are tightly abutted against the inner wall of the casing assembly, forming a circumferentially uniformly distributed support force. Then, the telescopic component 20 is activated, its piston rod extends, pushing the diameter-changing assembly connected to the outer casing 10 forward, thereby driving the pipe section to be jacked forward. After completing one jacking cycle, the piston rod of the telescopic component 20 retracts to maintain the pipe assembly at its minimum length. Then, the drive component 40 retracts, and the adjusting component 31 retracts radially under the counterforce. The top plate 32 then detaches from the inner wall of the pipe, releasing the support. At this point, the entire support structure can be removed from the pipe, ready for the next round of jacking operations. The entire process achieves a rapid support, jacking, and release cycle, significantly improving the continuity and automation level of pipe jacking construction.

[0028] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel pipe jacking relay station, characterized in that, The device includes a sleeve assembly and a support structure disposed in the middle of the sleeve assembly. The support structure includes a diameter-changing assembly and a telescopic component. The diameter-changing assembly is disposed at both ends of the telescopic component. The diameter-changing assembly includes a support ring, several adjusting components, and a top plate. The adjusting components are evenly distributed on one side of the support ring. One end of each adjusting component is connected to the top plate. The adjusting component can move radially toward the support ring about the axis of the support ring, thereby causing the multiple top plates to abut against or disengage from the inner wall of the sleeve assembly.

2. A steel pipe jacking relay station according to claim 1, characterized in that, The adjusting component is a diamond-shaped telescopic frame formed by connecting multiple connecting rods through hinge points at both ends.

3. A steel pipe jacking relay station according to claim 2, characterized in that, There are at least two support rings, which are coaxially spaced apart. Several support shafts are evenly distributed on the support rings, and the support shafts connect the two support rings. One end of the adjusting member is hinged to the support shaft.

4. A steel pipe jacking relay station according to claim 2, characterized in that, A connecting shaft is provided on the top plate, and one end of the adjusting member is hinged to the connecting shaft.

5. A steel pipe jacking relay station according to claim 2, characterized in that, The adjusting member has a side shaft on each side, and the two sides of the adjusting member are hinged to the side shafts respectively. A driving member is provided between adjacent adjusting members, and the two ends of the driving member are hinged to the side shafts of the two adjusting members respectively.

6. A steel pipe jacking relay station according to claim 1, characterized in that, The variable diameter assembly also includes a limiting member, which is disposed on one side of the support ring. The limiting member includes a limiting rod. A limiting channel composed of two plates is provided on one side of the top plate, and the limiting rod is disposed in the limiting channel.

7. A steel pipe jacking relay station according to claim 6, characterized in that, The extension direction of the limiting channel is parallel to the radial movement direction of the top plate, and the limiting rod has a T-shaped structure with its end forming a sliding fit with the limiting channel.

8. A steel pipe jacking relay station according to claim 1, characterized in that, The sleeve assembly includes an outer sleeve and an inner sleeve, the inner sleeve being slidable along the axial direction of the outer sleeve, wherein one set of reducing assemblies is connected to the outer sleeve, and another set of reducing assemblies is connected to the inner sleeve.

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