Rotary anti-blocking device suitable for pipe jacking construction

Abstract

The utility model discloses a rotary anti-blocking device suitable for pipe-jacking construction, which relates to the technical field of pipe-jacking construction and comprises a main jacking component and a rotary component, the main jacking component is arranged on the outer surface of a pipe-jacking section and fixedly connected with the pipe section, and the rotary component is fixedly connected with the main jacking component; the main jacking assembly comprises two arc-shaped jacking irons tightly attached to the outer surface of the pipe joint, and the two arc-shaped jacking irons are connected through a columnar shaft; the arc-shaped jacking iron is provided with an arc-shaped jacking iron groove, first sliding jacking iron is fixedly arranged in the jacking iron groove, and the outer end of the first sliding jacking iron is connected with a main jacking jack. The rotating assembly comprises rotating jacking iron fixedly connected with the columnar shaft, second sliding jacking iron is arranged in the rotating jacking iron, and the outer end of the second sliding jacking iron is connected with a rotating jack. The pipe jacking assembly is driven to rotate through the rotating assembly, so that the pipe joint is rotated for pipe withdrawing, disturbance is generated between the pipe joint and a soil layer, friction force can be reduced, smooth pipe withdrawing is achieved, and pipe clamping is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a rotating anti-jamming device suitable for pipe jacking construction. Background Art

[0002] In the construction of modern urban underground space, with the rise of various construction methods, pipe jacking has become a common construction method for underground pipeline construction. Pipe jacking is a dark excavation construction method widely used in underground construction technology. It is also called tunnel jacking engineering or underground jacking engineering. By using hydraulic jacks, the pipe sections are pushed in from the starting well in sequence. At the same time, mechanical excavation is used in front to discharge the soil. Finally, a complete pipeline is formed through the effective connection between the pipe sections. This technology is usually used in the construction of urban underground space, such as subway tunnels, water conservancy projects, traffic tunnels, etc., and has been greatly developed in my country.

[0003] However, in actual projects, when the pipe jacking process encounters an obstacle that cannot be cleared or the jacking system fails, it is necessary to remove the pipe structure that has been pushed into the soil layer, and use hydraulic equipment to pull the pipe segment in the opposite direction to pull out the pipe segment structure that has been pushed into the soil layer. This process is called pipe withdrawal.

[0004] During the pipe withdrawal process, when the pipe section encounters a harder soil layer, it is easy to be difficult to withdraw due to the increased friction between the pipe section and the soil layer, which leads to pipe jam. In addition, when the steel jacking pipe is withdrawn, the rubber sleeve at the jacking pipe welding connection is easy to be blocked at the hole, which can also cause pipe jam. Therefore, the pipe jam problem that occurs during the pipe withdrawal process needs to be solved in the field of pipe jacking construction. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned prior art, the utility model provides a rotating anti-stuck device suitable for pipe jacking construction. The pipe is withdrawn by rotating the pipe section, so that disturbance is generated between the pipe section and the soil layer, friction is reduced, and the pipe is withdrawn smoothly. Moreover, the arc-shaped top iron can be rotated along the columnar axis to adjust the arc, which is suitable for pipe jacking sections of different specifications and sizes.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A rotating anti-stuck device suitable for pipe jacking construction, arranged on the outer surface of a pipe jacking section, comprising a main jacking assembly and a rotating assembly, wherein the main jacking assembly is fixedly connected to the pipe section, and the rotating assembly is fixedly connected to the main jacking assembly;

[0008] The main top assembly comprises two arc-shaped top irons arranged close to the outer surface of the pipe segment, and the two arc-shaped top irons are connected by a columnar shaft; the arc-shaped top irons are provided with arc-shaped top iron grooves, and a first sliding top iron is fixedly arranged in the top iron grooves, and the outer end of the first sliding top iron is connected to the main top jack;

[0009] The rotating assembly comprises a rotating top iron fixedly connected to the columnar shaft, a second sliding top iron is arranged inside the rotating top iron, and a rotating jack is connected to the outer end of the second sliding top iron.

[0010] Furthermore, the arc-shaped top iron is connected to the top pipe segment by welding.

[0011] Furthermore, the rotating top iron is connected to the columnar shaft by welding.

[0012] Furthermore, a bearing opening is provided at one end of the arc-shaped top iron, and the columnar shaft passes through the bearing openings of the two arc-shaped top irons and is rotatably connected to the bearing openings.

[0013] Furthermore, bearing heads are provided at both ends of the cylindrical shaft, and the bearing heads are threadedly connected to the cylindrical shaft to prevent the cylindrical shaft from falling off.

[0014] Furthermore, the bearing opening is coaxially arranged with the cylindrical shaft, and the axis of the cylindrical shaft is parallel to the axis of the pipe segment.

[0015] Furthermore, the first sliding top iron is arc-shaped, and the curvature is consistent with the curvature of the top iron groove; the front and upper and lower surfaces of the first sliding top iron are provided with first rollers, which convert sliding friction into rolling friction, thereby reducing the friction resistance between the first sliding top iron and the inner surface of the top iron groove.

[0016] Furthermore, the rotating jack is perpendicular to the axial direction of the pipe segment.

[0017] Furthermore, second rollers are arranged on the upper and lower surfaces of the second sliding top iron to convert sliding friction into rolling friction, thereby reducing the friction resistance between the second sliding top iron and the inner surface of the rotating top iron.

[0018] Furthermore, two groups of the jacking pipe assemblies are provided on the outer surface of the pipe segment, the two groups of jacking pipe assemblies are symmetrically arranged, and each group of jacking pipe assemblies is provided with a rotating assembly.

[0019] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0020] 1. The utility model drives the jacking assembly to rotate through the rotating assembly, thereby rotating the pipe section to withdraw the pipe, so that disturbance is generated between the pipe section and the soil layer, which can reduce friction, realize smooth pipe withdrawal, and prevent pipe jamming.

[0021] 2. The left and right arc-shaped top irons in the utility model can be rotated along the columnar axis to adjust the curvature, so that they can adapt to pipe sections of different diameters to achieve close fitting, have better applicability, convenient construction, and are economical and efficient; at the same time, the arc-shaped top irons are detachably connected through the columnar axis. For jacking pipes with large differences in specifications, it is only necessary to replace the arc-shaped top irons of different diameters for assembly and use, without replacing other parts, further expanding the scope of application.

[0022] 3. In the utility model, the front and upper and lower surfaces of the first sliding top iron are provided with first rollers, and the upper and lower surfaces of the second sliding top iron are provided with second rollers, which convert sliding friction into rolling friction, reduce friction resistance, facilitate operation, and avoid the sliding top iron from getting stuck, saving time and effort.

[0023] 4. The utility model is a detachable and assembling structure, which can be prefabricated in the factory and assembled on site, and can be recycled and reused, which complies with the policy of energy conservation and emission reduction, and is economical, efficient, green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the main top assembly of the utility model;

[0027] Figure 3 This is an exploded schematic diagram of the main top assembly of the utility model;

[0028] Figure 4 This is a schematic diagram of the first sliding top iron structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the rotating assembly of the utility model;

[0030] Figure 6 It is a schematic diagram of the second sliding top iron structure of the utility model.

[0031] In the figure: 1. Main top assembly; 2. Rotating assembly; 3. Pipe joint;

[0032] 101, left arc-shaped top iron; 102, right arc-shaped top iron; 103, columnar shaft; 104, bearing head; 105, first sliding top iron; 106, main top jack; 107, bearing mouth; 108, first roller;

[0033] 201, rotating top iron; 202, second sliding top iron; 203, rotating jack; 204, second roller. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0036] Embodiment 1

[0037] In a typical embodiment of the present application, a rotation anti-jamming device suitable for pipe jacking construction is provided, such as Figure 1-6 As shown, it includes a main top assembly 1 and a rotating assembly 2. The main top assembly 1 is arranged on the outer surface of the top pipe section 3 and is fixedly connected to the pipe section 3. The rotating assembly 2 is fixedly connected to the main top assembly 1. The main top assembly includes two arc-shaped top irons arranged close to the outer surface of the pipe section, and the two arc-shaped top irons are connected by a columnar shaft 103; the arc-shaped top irons are provided with an arc-shaped top iron groove, and a first sliding top iron 105 is fixedly arranged in the top iron groove, and the outer end of the first sliding top iron is connected to the main top jack 106; the rotating assembly includes a rotating top iron 201 fixedly connected to the columnar shaft, and a second sliding top iron 202 is arranged in the rotating top iron, and the outer end of the second sliding top iron is connected to the rotating jack 203.

[0038] Specifically, Figure 2-3 As shown, the main top assembly includes a left arc top iron 101, a right arc top iron 102, a columnar shaft 103 connecting the left and right arc top irons, a bearing head 104, a first sliding top iron 105 and a main top jack 106. Among them, the inner side of the arc surface of the left and right arc top irons is set close to the outer wall surface of the pipe segment, and the arc top iron is made of steel and welded to the steel top pipe segment to achieve fixation. One end of the left and right arc top irons is processed with a circular bearing opening 107. When splicing, the bearing openings 107 of the left and right arc top irons are aligned, and the columnar shaft 103 passes through the bearing openings of the left and right arc top irons in turn for connection. Before the arc top iron is welded to the pipe segment, the left arc top iron and the right arc top iron can be rotated around the columnar shaft by a certain angle to adjust the curvature to ensure a close fit with the pipe segment. In a preferred embodiment, the bearing opening is coaxially arranged with the columnar shaft, and its axis is parallel to the axis of the pipe segment.

[0039] To ensure that the left and right arc-shaped top irons are firmly connected, bearing heads 104 are installed at both ends of the cylindrical shaft. The bearing heads are provided with external threads, and the cylindrical shaft is provided with reverse threads corresponding to the bearing heads for threaded connection, which is easy to install and can effectively prevent the cylindrical shaft from falling off and the left and right arc-shaped top irons from detaching.

[0040] An arc-shaped top iron groove is provided on one side of the arc-shaped top iron. The top iron groove is a blind hole with a certain depth. A first sliding top iron 105 is provided in the top iron groove. The first sliding top iron is confined in the top iron groove but can slide relative to the top iron groove. Figure 3-4 As shown, the first sliding top iron is in an arc shape, and the curvature and size are consistent with the top iron groove. At the same time, two first rollers 108 are provided on the front and upper and lower surfaces of the first sliding top iron 105, which can convert sliding friction into rolling friction, reduce the friction resistance between the first sliding top iron and the inner surface of the top iron groove, avoid the first sliding top iron from getting stuck when moving relative to each other, and facilitate operation.

[0041] The main jack 106 is connected to the side of the first sliding jack facing the opening of the jack slot. The first sliding jack 105 is provided with a fixing slot. The top of the main jack 106 is inserted into the fixing slot and connected to the first sliding jack 105. When the jacking pipe is withdrawn, the jacking jack is operated to apply force to drive the pipe section to make a translational movement along the axis in the opposite direction of the jacking process to withdraw the pipe section from the hole.

[0042] In addition, in order to avoid the defect of pipe sticking due to the large friction between the hard soil layer and the pipe joint during the pipe jacking and withdrawal process, the present embodiment further provides a rotating assembly.

[0043] like Figure 5 As shown, the rotating assembly 2 includes a rotating top iron 201, a second sliding top iron 202 and a rotating jack 203. In order to connect the rotating assembly with the arc top iron, the rotating top iron is fixed to the middle of the columnar shaft by welding, and the arc top iron can be driven by the rotating top iron to drive the main top assembly to move.

[0044] A slot of a certain depth is provided on one side of the rotating top iron 201, and a second sliding top iron is arranged in the slot. Figure 6 As shown, the shape and size of the second sliding top iron 202 are adapted to the slot, and the second rollers 204 are provided on the upper and lower surfaces of the second sliding top iron, which convert sliding friction into rolling friction, thereby reducing the friction resistance between the second sliding top iron and the inner surface of the rotating top iron. The outer end of the second sliding top iron is similar to the first sliding top iron, and is provided with a fixed groove. The rotating jack is inserted into the fixed groove and connected to the second top iron. After the rotating jack is started, the second sliding top iron is pushed to move, thereby driving the pipe section to rotate. In a preferred embodiment, the rotating jack is perpendicular to the axial direction of the pipe section, so that the operator can better drive the main top assembly and the top pipe section to rotate when pushing the rotating top iron, thereby reducing friction during pipe withdrawal and avoiding pipe jamming.

[0045] The purpose of the relative movement of the top iron groove of the arc top iron and the first sliding top iron is to prevent the jack from being twisted or even damaged due to the fixed operating end when the rotating jack is started and the arc top iron and the pipe section are pushed to rotate together.

[0046] In this embodiment, the left and right arc-shaped top irons can be rotated along the columnar shaft to adjust the curvature, so that they can adapt to pipe sections of various diameters within a certain range to achieve close fitting, with good applicability, convenient construction, and economical and efficient. At the same time, since the main top assembly and the rotating assembly are both assembled structures, the left and right arc-shaped top irons are detachably connected to the columnar shaft and the bearing head. Therefore, for top pipes with large differences in specifications, it is only necessary to replace the arc-shaped top irons of different diameters to assemble and use them without replacing other components and rotating assemblies, which further expands the scope of application and reduces production costs.

[0047] In addition, if Figure 1 As shown, in this embodiment, in order to further facilitate the operation, two groups of jacking pipe assemblies are provided on the outer surface of the pipe segment, the two groups of jacking pipe assemblies are symmetrically arranged, and a rotating assembly is provided on each group of jacking pipe assemblies.

[0048] The various components of the rotating anti-stuck device used in the pipe withdrawal process in the pipe jacking construction of this embodiment can be pre-processed in the factory and assembled on site. The specific construction steps are as follows:

[0049] 1) The construction unit determines the specifications and dimensions of each component of the above-mentioned rotating anti-jamming device according to the design requirements of the drawings, and processes each component in the factory.

[0050] 2) Construction preparation. Disconnect the hydraulic cylinder switch, remove the oil pipe and other related pipelines, then remove the jack bracket at the reaction wall during normal jacking, reinforce the starting hole and side wall of the working well, and form a pipe retreat reaction wall.

[0051] 3) Assemble the main top assembly. When splicing, align the bearing openings of the left and right arc top irons, and insert the cylindrical shaft into the bearing openings of the left and right arc top irons in turn. Install bearing heads at both ends of the cylindrical shaft and fix them by threaded connection. Place the assembled left and right arc top irons on the top pipe section, close to the outer wall of the section. For steel top pipes, use electric welding to fix the arc top iron and the section into a whole, and install an assembled main top assembly at the upper and lower symmetrical positions of the top pipe section.

[0052] 4) Install the main top jack in the main top assembly. Each arc top iron is equipped with a main top jack, and a total of four main top jacks are installed. Set up the main top jack, with one end supported on the reaction wall next to the starting hole through the base, and the other end aligned with the groove on the arc top iron. Insert the main top jack into the fixing groove of the first sliding top iron, and start the main top jack to push the first sliding top iron into the top iron groove.

[0053] 5) Install the rotating assembly. The rotating assembly is arranged perpendicular to the axis of the jacking pipe, and two are installed, respectively installed on the top and bottom of the pipe section. During splicing, the rotating top iron is welded to the columnar shaft, and the base of the rotating jack is supported on the reaction wall of the side walls on both sides of the starting hole of the working well. The main body of the rotating jack is mounted on the truss, and can be translated as the jacking pipe section is withdrawn. The second sliding top iron at one end of the rotating jack is fixed in the groove, and the rotating jack is started to push the second sliding top iron into the rotating top iron.

[0054] 6) After the preparation for pipe withdrawal is completed, the rotating pipe withdrawal construction is started. The rotating jack drives the second sliding top iron to push the rotating top iron, so that the main top assembly rotates, thereby driving the top pipe section to rotate, reducing the friction between the pipe section and the soil layer, and facilitating pipe withdrawal. At the same time, under the action of the main top jack, the pipe section moves in a translational motion along the axis in the opposite direction of the top pipe, and finally pulls the pipe section out of the hole.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Those skilled in the art should understand that the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotating anti-stuck device suitable for pipe jacking construction, arranged on the outer surface of the pipe jacking section, characterized in that: It comprises a main top assembly and a rotating assembly, wherein the main top assembly is fixedly connected to the pipe joint, and the rotating assembly is fixedly connected to the main top assembly; The main top assembly comprises two arc-shaped top irons arranged close to the outer surface of the pipe segment, and the two arc-shaped top irons are connected by a columnar shaft; the arc-shaped top irons are provided with arc-shaped top iron grooves, and a first sliding top iron is fixedly arranged in the top iron grooves, and the outer end of the first sliding top iron is connected to the main top jack; The rotating assembly comprises a rotating top iron fixedly connected to the columnar shaft, a second sliding top iron is arranged inside the rotating top iron, and a rotating jack is connected to the outer end of the second sliding top iron.

2. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: A bearing opening is arranged at one end of the arc-shaped top iron, and the columnar shaft passes through the bearing openings of the two arc-shaped top irons and is rotatably connected with the bearing openings.

3. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: Bearing heads are arranged at both ends of the cylindrical shaft, and the bearing heads are threadedly connected to the cylindrical shaft.

4. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 2, characterized in that: The bearing opening is coaxially arranged with the columnar shaft, and the axis of the columnar shaft is parallel to the axis of the pipe segment.

5. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: The first sliding top iron is in an arc shape, and the arc is consistent with the arc of the top iron groove; the front face and the upper and lower surfaces of the first sliding top iron are both provided with first rollers.

6. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: The rotating jack is perpendicular to the axial direction of the pipe section.

7. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: Second rollers are arranged on the upper and lower surfaces of the second sliding top iron.

8. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 1, characterized in that: The arc-shaped top iron is welded to the top pipe section.

9. A rotation anti-jamming device suitable for pipe jacking construction as claimed in claim 8, characterized in that: The rotating top iron is welded to the columnar shaft.

10. A rotation anti-jamming device suitable for pipe jacking construction according to any one of claims 1 to 9, characterized in that: Two groups of jacking pipe components are arranged on the outer surface of the pipe section, the two groups of jacking pipe components are symmetrically arranged, and each group of jacking pipe components is provided with a rotating component.

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