Movable jacking pipe retaining device

Abstract

A movable jacking pipe retaining device is characterized by comprising a vertical support, an arc-shaped supporting check block, a T-shaped bolt, a sliding groove, a fixing bolt, an inclined support and a reinforcing support. The vertical support is used for ensuring the stability of the device; the inclined support is used for improving the stability of the device; the arc-shaped supporting stop block is used for stopping the jacking pipe from retreating; the arc-shaped supporting stop block slides to the notch of the tongue-and-groove pipe and is used for temporarily supporting the end part of the pipeline; the sliding grooves are used for longitudinal movement of the vertical supports and the inclined supports. Tooth-shaped grooves are formed in the inner sides of the sliding grooves and the T-shaped bolts and used for preventing the supporting plates and the inclined struts from sliding under stress. The reinforcing support is used for enhancing the force transmission capacity of the vertical support; the pipe jacking device is simple in structure and convenient to operate, fixing is achieved through the fixing bolts, the supporting check blocks can slide out of the pipeline, construction is convenient, the pipe jacking is prevented from retreating in the construction process, and construction efficiency is improved.

Description

Technical Field

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

[0002] During the construction of tongue-and-groove pipe jacking, when the oil of the main jacking jack is returned and the next section of the jacking pipe is installed, the machine head and pipeline in front of the jacking pipe retreat due to excessive water and soil pressure in front and insufficient side friction resistance, and the rubber ring of the hole opening flips over, resulting in ground subsidence and water and sand gushing accidents. In order to ensure that the pipe section that has been advanced does not shrink, it is necessary to set a jacking stop device at the starting end of the jacking pipe to prevent the pipe section from retreating. Utility Model Content

[0003] The purpose of the utility model is to make the whole device have good stability through the design of vertical support, oblique support and reinforced support, which can effectively prevent the jacking pipe from shaking during the construction process. Before the oil of the jacking pipe main jack is returned and the next jacking pipe section is installed, the pipe end is temporarily supported, thereby avoiding the jacking pipe from retreating during the construction process and improving construction efficiency.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a movable jacking pipe stopping device, characterized in that it includes a vertical support, an arc-shaped support block, a T-bolt, a slide groove, a fixing bolt, an oblique support and a reinforcing support; the lower end of the vertical support is installed on the two outer slide grooves by a T-bolt to ensure the stability of the device; the upper end of the oblique support is welded to the inner side of the middle of the vertical support, and the lower end is installed on the two inner slide grooves by a T-bolt to increase the stability of the device; the vertical support and the oblique support move longitudinally on the slide groove according to the tongue and groove position of the pipe end; the four arc-shaped support blocks are respectively arranged on the vertical support and the oblique support to prevent the jacking pipe from retreating; the arc-shaped support block slides to the tongue and groove pipe The notch is fixed with a fixing bolt and is used to temporarily support the end of the pipe before the main jacking jack returns oil and the next section of the jacking pipe is installed; the fixing bolt is loosened from the arc support block, and the support block is slid outside the pipe to install the next section of the jacking pipe. After the main jack returns oil, the next section of the pipe is pushed in; a toothed area is provided within the sliding range of the arc support block, and a toothed nut is used to prevent the arc support block from sliding under force; the four slides are laid in parallel on the upper end of the jacking guide rail for vertical support and diagonal support for longitudinal movement; the inner side of the slide and the T-bolt are provided with a toothed groove to prevent the support plate and the diagonal support from sliding under force; one end of the reinforced support is welded to the vertical support, and the other end is installed on the guide rail to enhance the force transmission capacity of the device.

[0005] As a movable jacking prevention device of the utility model, it is characterized in that the inner surface of the arc-shaped support block is covered with wear-resistant non-metallic material to protect the jacking surface and extend the service life; the arc-shaped support block includes a buffer or shock absorber to reduce the impact force during the jacking process.

[0006] As a movable pipe jacking prevention device of the utility model, it is characterized in that: the slide groove is provided with an adjustable elastic element to absorb and reduce the impact and vibration caused by the pipe jacking operation; the slide groove is equipped with an adjustable limiter to control the movement range of the vertical support and the oblique support.

[0007] The utility model provides a movable pipe jacking anti-retraction device, which has the following beneficial effects:

[0008] The utility model has a simple structure and is easy to operate. Workers can easily slide the arc-shaped support block to the notch of the tongue-and-groove pipe and fix it with fixing bolts, or slide the support block outside the pipe to facilitate construction. Before the oil of the main jacking jack is returned and the next jacking pipe section is installed, the pipe end is temporarily supported to avoid the retreat of the jacking pipe during construction and improve construction efficiency. The utility model has strong stability. Through the design of vertical support, oblique support and reinforced support, the whole device has good stability, which can effectively prevent the jacking pipe from shaking during construction. The design of the arc-shaped support block can effectively protect the jacking pipe during the jacking construction process and avoid damage to the jacking pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a cross-sectional schematic diagram of the normal jacking state of the jacking pipe of the present invention;

[0010] Figure 2 This is a cross-sectional diagram of the pipe jacking installation state of the next pipe section of the present invention;

[0011] Figure 3 This is a side view of the structure of the present invention when in use;

[0012] In the figure: 1. Vertical support; 2. Arc-shaped support block; 201. Toothed area; 3. Slide; 4. Diagonal support; 5. Reinforced support; 6. Tongue and groove pipe; 7. Jacking guide rail; 8. T-bolt; 9. Fixing bolt. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the practical embodiment to clearly and completely describe the technical solutions in the practical embodiment. Obviously, the described embodiment is only a part of the embodiment of this utility, not all of the embodiments. Based on the embodiment of this utility, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility.

[0014] See also Figure 1 The utility model provides a technical solution: a movable pipe jacking anti-retraction device:

[0015] In this embodiment, four parallel chutes are installed at the top of the jacking rails, providing a stable path for the vertical and diagonal supports. The chutes are designed to withstand wear and tear over time, utilizing highly wear-resistant materials and undergoing surface treatment for enhanced durability. The lower ends of the vertical supports are attached to the two outer chutes via T-bolts. This design allows the vertical supports to move longitudinally within the chutes to accommodate jacking pipes of varying lengths. The T-bolts also provide a secure securement mechanism, preventing the supports from slipping when under load. The upper ends of the diagonal supports are welded to the inner center of the vertical supports, while their lower ends are attached to the two inner chutes via T-bolts. This structure not only enhances the overall stability of the system but also allows for rapid assembly and disassembly, improving construction efficiency. Four curved support blocks are installed on the vertical and diagonal supports to prevent the jacking pipe from moving backward. These blocks provide temporary support for the pipe ends before the main jacking jack returns to oil and the next jacking section is installed, ensuring safe construction. The curved support blocks slide along the chutes to accommodate jacking pipes of varying sizes. When the next section of pipe jacking needs to be installed, the fixing bolts on the curved support block are loosened, and the support block is slid out of the pipe to facilitate the advancement of the pipe jacking. One end of the reinforced support is welded to the vertical support, and the other end is mounted on the guide rail to enhance the vertical support's force transmission capacity. This design ensures that the vertical support can effectively transmit force during the pipe jacking process, reducing damage to the device caused by uneven force. A toothed area is provided within the sliding range of the curved support block, which cooperates with the toothed nut to prevent the curved support block from sliding under force.

[0016] Before the main jacking jack returns oil and the next section of the jacking pipe is installed, the four movable arc-shaped support blocks are slid into the notch of the tongue-and-groove pipe and fixed with fixing bolts to temporarily support the end of the pipe; the water and soil pressure in front is transmitted to the guide rail and the wall of the jacking working shaft through the arc-shaped support blocks, vertical supports and reinforced supports to achieve the goal of stopping retreat; after the next section of the jacking pipe is installed and the main jack returns oil, the fixing bolts of the arc-shaped support blocks are loosened, and the arc-shaped support blocks are slid out of the pipe to carry out the jacking work of the next section of the pipe.

[0017] Specifically, the inner surface of the arc-shaped support block is covered with wear-resistant non-metallic material to protect the surface of the jacking pipe and extend its service life; the arc-shaped support block includes a buffer or shock absorber to reduce the impact force during the jacking process.

[0018] In this embodiment: selecting suitable wear-resistant non-metallic materials is the key to ensuring the long-term stable operation of the arc support block; the arc design can better disperse and absorb the impact force from the pipeline. Compared with the traditional straight-line design, the arc structure provides a larger contact area, thereby reducing the pressure per unit area and reducing the wear rate; in order to further reduce the impact force during the pipe jacking process, the arc support block can be equipped with a buffer or shock absorber. Install a hydraulic shock absorber or a spring-type buffer inside the arc support block; regularly check the wear of the arc support block, especially under extreme working conditions, such as high load, high temperature or corrosive environment, which requires frequent maintenance.

[0019] Specifically, the chute is provided with an adjustable elastic element to absorb and reduce the impact and vibration caused by the jacking operation; the chute is equipped with an adjustable limiter to control the movement range of the vertical support and the diagonal support.

[0020] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A movable pipe jacking anti-retraction device, characterized in that: The invention comprises a vertical support (1), an arc-shaped support block (2), a T-bolt (8), a slide groove (3), a fixing bolt (9), an oblique support (4) and a reinforcing support (5); the lower end of the vertical support (1) is installed on the two outer slide grooves (3) by means of a T-bolt (8) to ensure the stability of the device; the upper end of the oblique support (4) is welded to the inner side of the middle of the vertical support (1), and the lower end is installed on the two inner slide grooves (3) by means of a T-bolt (8) to increase the stability of the device; the vertical support (1) and the oblique support (4) move longitudinally on the slide groove (3) according to the tongue-and-groove position of the pipe end; four arc-shaped support blocks (2) are respectively arranged on the vertical support (1) and the oblique support (4) to prevent the top pipe from retreating; the arc-shaped support block (2) slides to the notch of the tongue-and-groove pipe and is fixed with a fixing bolt (9) to prevent the top pipe from retreating. The jack is used to temporarily support the end of the pipeline before the oil is returned to the jack and the next section of the jacking pipe is installed; the fixing bolt (9) is loosened from the arc support block (2), and the arc support block (2) is slid outside the pipeline to install the next section of the jacking pipe. After the main jack returns the oil, the next section of the pipeline is pushed in; a toothed area (201) is provided within the sliding range of the arc support block (2), and the toothed nut is used to prevent the arc support block (2) from sliding under force; four slide grooves (3) are laid in parallel on the upper end of the jacking pipe guide rail (7) for longitudinal movement of the vertical support (1) and the oblique support (4); the inner side of the slide groove (3) and the T-bolt (8) are provided with a toothed groove for preventing the vertical support (1) and the oblique support (4) from sliding under force; one end of the reinforcing support (5) is welded to the vertical support (1) and the other end is installed on the jacking pipe guide rail (7) for enhancing the force transmission capacity of the device.

2. The movable pipe jacking anti-retraction device according to claim 1, characterized in that: The inner surface of the arc-shaped support block (2) is covered with a wear-resistant non-metallic material to protect the surface of the jacking pipe and extend its service life; the arc-shaped support block (2) is provided with a buffer or shock absorber to reduce the impact force during the jacking process.

3. The movable pipe jacking anti-retraction device according to claim 1, characterized in that: The slide chute (3) is provided with an adjustable elastic element to absorb and reduce the impact and vibration caused by the pipe jacking operation; the slide chute (3) is equipped with an adjustable limiter to control the movement range of the vertical support (1) and the oblique support (4).

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