A retreat-stop device and retreat-stop method of a pipe jacking equipment

Abstract

The application discloses a retreat stopping device and retreat stopping method of pipe jacking equipment, and solves the problem of difficult retreat of equipment and pipe segments during pipe jacking equipment construction in the prior art. The retreat stopping device of the pipe jacking equipment comprises a retreat stopping top iron arranged in blocks, the retreat stopping top iron is arranged on a starting platform or a trolley through a top iron supporting structure, a retreat stopping driving element is connected to the retreat stopping top iron, one end of the retreat stopping driving element is connected to the retreat stopping top iron, and the other end is connected to the trolley or a tunnel portal surface, and the retreat stopping top iron can move forward and backward along the tunnel axis under the action of the retreat stopping driving element. The retreat stopping device of the pipe jacking equipment realizes the retreat function of the pipe segment and the equipment by step-by-step extension of the retreat stopping oil cylinder in the retreat stopping device. Compared with the prior art, the retreat stopping device and retreat stopping method of the pipe jacking equipment can completely avoid the alignment operation of the retreat frame and the pipe segment pin hole, reduce the operation difficulty in the retreat process, improve the tunneling construction efficiency and construction precision, and effectively solve the problem of difficult retreat of the equipment and the pipe segments during pipe jacking equipment construction in the prior art.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, and in particular to a backlash prevention device and method for pipe jacking equipment. Background Technology

[0002] Pipe jacking machines are commonly used tunneling equipment in underground space construction. During construction, maintaining pressure balance at the tunnel face is crucial. In the tunneling process, the thrust of the jacking cylinders and the water and soil pressure at the face form a balanced force. However, when installing new pipe sections, the jacking cylinders cannot provide propulsion, and the pipe jacking machine and the already jacked pipe sections tend to move backward under the water and soil pressure at the face, posing a risk of displacement.

[0003] Traditional pipe jacking anti-backlash devices require manual installation of anti-backlash pins, aligning them with the pin holes on the anti-backlash bracket and pipe section. However, this method demands precise circumferential positioning of the pipe section during assembly, and aligning the pin holes on the pipe section with those on the anti-backlash bracket is difficult. Recent developments in automatic locking anti-backlash devices, such as the self-locking anti-backlash device and method for pipe jacking (application number 202011320265.1), rely on hydraulic cylinders for installing and removing anti-backlash pins, saving manpower. However, aligning the pin holes on the pipe section and anti-backlash bracket still requires manual judgment, making alignment difficult and labor-intensive. Furthermore, the gap between the anti-backlash pin shaft and the pin hole can cause slight pipe section backlash, affecting construction accuracy. Therefore, designing an anti-backlash device for pipe jacking equipment that is simple to operate, has high construction accuracy, and requires no pin hole positioning is essential. Summary of the Invention

[0004] To address the shortcomings in the aforementioned background technology, this invention proposes a backstop device and method for pipe jacking equipment, which solves the problem of difficulty in stopping the equipment and segments from retreating during pipe jacking construction in the prior art.

[0005] The technical solution of the present invention is implemented as follows: a backstop device for a pipe jacking equipment includes a backstop jacking iron arranged in sections. The backstop jacking iron is set on the starting platform or trolley through a jacking iron support structure. A backstop driving component is connected to the backstop jacking iron. One end of the backstop driving component is connected to the backstop jacking iron, and the other end is connected to the trolley or the tunnel portal. Under the action of the backstop driving component, the backstop jacking iron can move back and forth along the tunnel axis.

[0006] As a preferred embodiment, the anti-reverse top iron includes an upper anti-reverse top iron and a lower anti-reverse top iron, which are arranged correspondingly to each other. The upper anti-reverse top iron is mounted on the launching platform or trolley through an upper top iron support structure, and the lower anti-reverse top iron is mounted on the launching platform or trolley through a lower top iron support structure.

[0007] As a preferred embodiment, the anti-reverse drive component is an anti-reverse cylinder assembly, with an upper left anti-reverse cylinder assembly and an upper right anti-reverse cylinder assembly connected to the upper anti-reverse top iron; and a lower anti-reverse cylinder assembly connected to the lower anti-reverse top iron.

[0008] As a preferred embodiment, the upper anti-reverse top iron is an inverted L-shaped structural component, with one end being the vertical beam connection end and the other end being the clearance end. The upper left anti-reverse cylinder group is connected to the vertical beam connection end, and the upper right anti-reverse cylinder group is connected to the clearance end. The upper top iron support structure provides support to the upper anti-reverse top iron through the vertical beam connection end.

[0009] As a preferred embodiment, one end of the upper right anti-reverse cylinder assembly is detachably connected to the back of the avoidance end, and the other end is rotatably connected to the trolley or tunnel entrance.

[0010] As a preferred embodiment, the lower anti-reverse jacking iron is an arc-shaped structural component that matches the tunnel segment; or other jacking mechanism components.

[0011] As a preferred embodiment, the upper top iron support structure includes a sleeve component disposed on the upper anti-reverse top iron and a support shaft component disposed on the starting platform or trolley, wherein the sleeve component and the support shaft component are in sliding fit.

[0012] As a preferred embodiment, the lower top iron support structure includes a slide rail component installed on the starting platform or trolley and a pulley component installed at the bottom of the lower anti-reverse top iron, with the pulley component cooperating with the slide rail component.

[0013] A method for stopping the backward movement of the anti-backward device of the pipe jacking equipment, comprising the following steps: S1: After the pipe jacking equipment completes one ring of pushing, the pipe segment is transported to the working area;

[0014] S2: The lower anti-reverse cylinder group drives the lower anti-reverse top iron to move backward along the tunnel excavation axis through the lower top iron support structure, so that the lower part of the main unit and the lower anti-reverse top iron leave a segment space. At this time, the upper left anti-reverse cylinder group and the upper right anti-reverse cylinder group prevent the equipment or segments from moving backward.

[0015] S3: Transport the lower ring segments to the segment space between the lower part of the main unit and the lower anti-reverse top iron;

[0016] S4: The lower anti-reverse cylinder assembly drives the lower anti-reverse top iron to move forward until it presses against the tube segment in step S3;

[0017] S5: Control the upper left and upper right anti-reverse cylinder groups to work simultaneously, driving the upper anti-reverse top iron to move backward along the tunnel excavation axis through the upper top iron support structure, so that the upper part behind the main unit and the upper anti-reverse top iron leave space for the tunnel segments. At this time, the lower anti-reverse cylinder group prevents the equipment or tunnel segments from moving backward.

[0018] S6: Disconnect the upper right anti-reverse cylinder assembly from the upper anti-reverse top iron, and rotate the cylinder of the upper right anti-reverse cylinder assembly to make room for the transportation of the upper ring segment.

[0019] S7: Hoist the upper ring segment to the designated position and connect it with the already fixed lower ring segment to form a ring. Then connect the ring segment to the equipment or segment in front.

[0020] S8: Reconnect the upper right anti-reverse cylinder assembly to the upper anti-reverse top iron; the upper left and upper right anti-reverse cylinder assemblies work simultaneously to tighten the upper ring tube segment;

[0021] S9: The pipe jacking equipment operates to complete the jacking work of the next ring of the tunnel. Repeat steps S1-S8 until all subsequent segments are assembled.

[0022] The segment in step S1 is a split design, which includes an upper ring segment and a lower ring segment. The upper ring segment and the lower ring segment can be spliced ​​together to form a complete ring segment.

[0023] The beneficial effects of this invention are as follows: The anti-reverse device of this invention for pipe jacking equipment achieves the function of stopping the pipe section and equipment from retreating by extending the anti-reverse cylinder in stages. Compared with the prior art, the anti-reverse device and method of this pipe jacking equipment can completely avoid the alignment operation between the anti-reverse frame and the pin hole of the pipe section, reduce the operational difficulty of the anti-reverse process, and improve the efficiency and accuracy of tunneling construction; it effectively solves the problem of difficulty in stopping the equipment and segments during pipe jacking construction in the prior art. Moreover, the anti-reverse device of this invention can also provide propulsion power for the equipment, improve the adaptability of the equipment, meet market demands, and has great promotional value. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an overall layout diagram of the anti-reverse device of the present invention.

[0026] Figure 2 This is a diagram showing the arrangement of the anti-reverse top iron of the present invention.

[0027] Figure 3 This is a diagram showing the arrangement of the top iron support structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the top iron support structure of the present invention.

[0029] Figure 5This is a layout diagram of the anti-reverse hydraulic cylinder assembly of the present invention.

[0030] Figure 6 This is a schematic diagram of the main view of the assembly of the lower ring segments of the first ring.

[0031] Figure 7 This is a side view of the assembly of the lower ring segments of the first ring.

[0032] Figure 8 This is a schematic diagram of the main view of the assembly of the upper ring segments of the first ring.

[0033] Figure 9 This is a side view diagram of the assembly of the upper ring segments of the first ring.

[0034] Figure 10 This is a schematic diagram of the removal of the upper right anti-reverse cylinder assembly.

[0035] Figure 11 This is a flowchart of the workflow of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 , 2 As shown in Embodiment 1, a backstop device for a pipe jacking equipment includes a segmented backstop jacking iron 1. The backstop jacking iron can be configured with multiple segments depending on the pipe segment structure; this embodiment uses two segments as an example. The backstop jacking iron 1 is mounted on the starting platform or trolley via a jacking iron support structure 2. A backstop driving component is connected to the backstop jacking iron 1. One end of the backstop driving component is connected to the backstop jacking iron 1, and the other end is connected to the trolley or tunnel portal. Under the action of the backstop driving component, the backstop jacking iron 1 can move back and forth along the tunnel axis; this is used to alternately tighten the pipe segments or equipment, preventing the equipment or pipe segments from moving backward.

[0038] In this embodiment, the anti-reverse jacking iron 1 includes an upper anti-reverse jacking iron 1-1 and a lower anti-reverse jacking iron 1-2. Both the upper and lower anti-reverse jacking irons are directly attached to the tunnel segments or equipment during operation. The anti-reverse jacking iron can be divided into two or more pieces; in this embodiment, it is divided into two pieces, namely the upper anti-reverse jacking iron and the lower anti-reverse jacking iron, which do not affect each other during operation. The upper and lower anti-reverse jacking irons 1-1 and 1-2 are arranged vertically to provide support and guidance for the anti-reverse jacking iron, ensuring that it does not deviate or rotate when reciprocating along the tunnel excavation axis.

[0039] In this preferred embodiment, the anti-reverse drive component provides power for the movement of the anti-reverse cylinder assembly 3. The anti-reverse cylinder assembly 3 includes an upper left anti-reverse cylinder assembly 3-1, an upper right anti-reverse cylinder assembly 3-2, and a lower anti-reverse cylinder assembly 3-3. The upper anti-reverse cylinder assembly 3-1 and the upper right anti-reverse cylinder assembly 3-2 are connected to the upper anti-reverse cylinder assembly 1-1; the lower anti-reverse cylinder assembly 3-3 is connected to the lower anti-reverse cylinder assembly 1-2. Each anti-reverse cylinder assembly may include one, two, or more cylinders. In this embodiment, each anti-reverse cylinder assembly includes two cylinders, providing a stable pushing force. The movement of the anti-reverse cylinder is controlled by the anti-reverse cylinders, and they can be operated synchronously or controlled independently during operation.

[0040] Example 2: Figure 3 , 5 As shown, a backstop device for a pipe jacking machine is described. In this embodiment, as a preferred solution, the upper backstop jacking iron 1-1 is an inverted L-shaped structural component; other structural components of different shapes can also be used as needed. One end of the upper backstop jacking iron is a vertical beam connection end, and the other end is a clearance end. The upper left backstop cylinder group 3-1 is connected to the vertical beam connection end, and the upper jacking iron support structure 2-1 provides support to the upper backstop jacking iron 1-1 through the vertical beam connection end, ensuring the stability of the support; the upper right backstop cylinder group 3-2 is connected to the clearance end, which can prevent interference during the segment hoisting process and ensure the smooth assembly of the segments.

[0041] In this embodiment, one end of the upper right anti-reverse cylinder assembly 3-2 is detachably connected to the back of the clearance end, and the other end is rotatably connected to the trolley or tunnel portal. When hoisting the upper ring segment, the connection between the upper right anti-reverse cylinder assembly and the upper anti-reverse jacking iron needs to be removed, and the cylinder of the upper right anti-reverse cylinder assembly needs to be rotated downwards to make room for the transportation of the upper ring segment; after the segment is installed in place, the upper right anti-reverse cylinder assembly and the upper anti-reverse jacking iron are reconnected. As a preferred embodiment, the lower anti-reverse jacking iron 1-2 is an arc-shaped structural component that matches the segment or other components that can provide stable jacking to ensure stable jacking of the segment.

[0042] The other structures are the same as in Example 1.

[0043] Example 3: As Figure 4 As shown, a backstop device for a pipe jacking machine, in this preferred embodiment, includes a sleeve 201 mounted on the upper backstop jacking 1-1 and a support shaft 202 mounted on the starting platform or trolley. The sleeve 201 and the support shaft 202 are slidably fitted together and correspond one-to-one. The support shafts are arranged along the tunnel axis, and the number can be two or more as needed. Under the action of the backstop cylinder, the sleeve 201 drives the upper backstop jacking to move along the support shaft, realizing the axial movement of the upper backstop jacking.

[0044] The lower top iron support structure can also adopt the same structure as the upper top iron support structure. In this embodiment, as a preferred option, the lower top iron support structure 2-2 includes a slide rail 21 mounted on the starting platform or trolley and a pulley 22 mounted at the bottom of the lower anti-reverse top iron 1-2. The pulley 22 cooperates with the slide rail 21. Under the action of the anti-reverse cylinder, the pulley drives the lower anti-reverse top iron to move axially along the slide rail.

[0045] The other structures are the same as in Example 2.

[0046] Example 4: Figures 6-11 As shown, a method for stopping the backward movement of a pipe jacking equipment as described in Embodiment 2 or 3 is as follows: S1: After the pipe jacking equipment pushes one ring, the pipe segment is transported to the working area; the pipe segment is designed in half, and the pipe segment includes an upper ring pipe segment and a lower ring pipe segment, which can be spliced ​​together to form a complete ring pipe segment.

[0047] S2: The lower anti-reverse jack remains stationary. The lower anti-reverse cylinder group drives the lower anti-reverse jack to move backward along the tunnel excavation axis through the lower jack support structure, leaving space between the lower part of the main unit and the lower anti-reverse jack, ensuring that the lower ring segment can be smoothly positioned in the segment space at this location. At this time, the upper left anti-reverse cylinder group and the upper right anti-reverse cylinder group prevent the equipment or segment from moving backward.

[0048] S3: Transport the lower ring segments to the segment space between the lower part of the main unit and the lower anti-reverse top iron to ensure assembly accuracy.

[0049] S4: The lower anti-reverse cylinder assembly drives the lower anti-reverse jack to move forward until it presses against the tube segment in step S3; it pushes and stops the lower ring tube segment.

[0050] S5: Control the upper left and upper right anti-reverse cylinder groups to work simultaneously, driving the upper anti-reverse jacking iron to move backward along the tunnel excavation axis through the upper jacking iron support structure, leaving a segment space between the upper part of the main unit and the upper anti-reverse jacking iron, ensuring that the upper ring segment can be smoothly placed in the segment space at this location. At this time, the lower anti-reverse cylinder group prevents the equipment or segment from moving backward.

[0051] S6: Disconnect the upper right anti-reverse cylinder assembly from the upper anti-reverse top iron, and rotate the cylinder of the upper right anti-reverse cylinder assembly to make room for the transportation of the upper ring segment; avoid interference during the hoisting process.

[0052] S7: Hoist the upper ring segment to the designated position and connect it with the already fixed lower ring segment to form a ring. Then connect the ring segment to the equipment or segment in front; complete the assembly of one ring segment.

[0053] S8: Reconnect the upper right anti-reverse cylinder assembly to the upper anti-reverse top iron; the upper left and upper right anti-reverse cylinder assemblies work simultaneously to tighten the upper ring tube segment.

[0054] S9: The pipe jacking equipment operates to complete the jacking work of the next ring of the tunnel. Repeat steps S1-S8 until all subsequent segments are assembled.

[0055] Compared with existing technologies, the anti-reverse device and method of this pipe jacking equipment can completely avoid the alignment operation between the anti-reverse frame and the pin hole of the pipe section, reduce the operational difficulty of the anti-reverse process, improve the tunneling efficiency and construction accuracy, and solve the problem of difficulty in stopping the equipment and segments during the construction of pipe jacking equipment in existing technologies.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A backlash prevention device for pipe jacking equipment, characterized in that: The system includes a segmented anti-reverse top iron (1), which is set on the starting platform or trolley via a top iron support structure (2). An anti-reverse drive component is connected to the anti-reverse top iron (1), with one end of the anti-reverse drive component connected to the anti-reverse top iron (1) and the other end connected to the trolley or tunnel portal. Under the action of the anti-reverse drive component, the anti-reverse top iron (1) can move back and forth along the tunnel axis. The anti-reverse top iron (1) includes an upper anti-reverse top iron (1-1) and a lower anti-reverse top iron (1-2), which are arranged vertically and vertically respectively. The upper anti-reverse top iron (1-1) is set on the starting platform or trolley through the upper top iron support structure (2-1), and the lower anti-reverse top iron (1-2) is set on the starting platform or trolley through the lower top iron support structure (2-2). The anti-reverse drive component is the anti-reverse cylinder assembly (3). The upper anti-reverse top iron (1-1) is connected to the upper left anti-reverse cylinder assembly (3-1) and the upper right anti-reverse cylinder assembly (3-2); the lower anti-reverse top iron (1-2) is connected to the lower anti-reverse cylinder assembly (3-3). One end of the upper anti-reverse top iron (1-1) is the vertical beam connection end, and the other end is the clearance end; one end of the upper right anti-reverse cylinder group (3-2) is detachably connected to the back of the clearance end, and the other end is rotatably connected to the trolley or tunnel entrance.

2. The anti-backward device for pipe jacking equipment according to claim 1, characterized in that: The upper anti-reverse top iron (1-1) is an inverted L-shaped structural component. The upper left anti-reverse cylinder group (3-1) is connected to the vertical beam connection end, and the upper right anti-reverse cylinder group (3-2) is connected to the clearance end. The upper top iron support structure (2-1) provides support to the upper anti-reverse top iron (1-1) through the vertical beam connection end.

3. The anti-backward device for pipe jacking equipment according to claim 2, characterized in that: The lower anti-reverse top iron (1-2) is an arc-shaped structural component that matches the tunnel lining segments.

4. The anti-backflow device for pipe jacking equipment according to any one of claims 1 to 3, characterized in that: The upper top iron support structure (2-1) includes a sleeve (201) set on the upper anti-reverse top iron (1-1) and a support shaft (202) set on the starting platform or trolley, with the sleeve (201) and the support shaft (202) slidingly engaged.

5. The anti-backward device for pipe jacking equipment according to claim 4, characterized in that: The lower top iron support structure (2-2) includes a slide rail (21) set on the starting platform or trolley and a pulley (22) set at the bottom of the lower anti-reverse top iron (1-2), with the pulley (22) cooperating with the slide rail (21).

6. A method for preventing the backlash of a pipe jacking equipment as described in claim 1 or 5, characterized in that: The steps are as follows: S1: After the pipe jacking equipment completes one ring of jacking, transport the pipe segments to the working area; S2: The lower anti-reverse cylinder group drives the lower anti-reverse top iron to move backward along the tunnel excavation axis through the lower top iron support structure, so that the lower part of the main unit and the lower anti-reverse top iron leave a segment space. At this time, the upper left anti-reverse cylinder group and the upper right anti-reverse cylinder group prevent the equipment or segments from moving backward. S3: Transport the lower ring segments to the segment space between the lower part of the main unit and the lower anti-reverse top iron; S4: The lower anti-reverse cylinder assembly drives the lower anti-reverse top iron to move forward until it presses against the tube segment in step S3; S5: Control the upper left and upper right anti-reverse cylinder groups to work simultaneously, driving the upper anti-reverse top iron to move backward along the tunnel excavation axis through the upper top iron support structure, so that the upper part behind the main unit and the upper anti-reverse top iron leave space for the tunnel segments. At this time, the lower anti-reverse cylinder group prevents the equipment or tunnel segments from moving backward. S6: Disconnect the upper right anti-reverse cylinder assembly from the upper anti-reverse top iron, and rotate the cylinder of the upper right anti-reverse cylinder assembly to make room for the transportation of the upper ring segment. S7: Hoist the upper ring segment to the designated position and connect it with the already fixed lower ring segment to form a ring. Then connect the ring segment to the equipment or segment in front. S8: Reconnect the upper right anti-reverse cylinder assembly to the upper anti-reverse top iron; the upper left and upper right anti-reverse cylinder assemblies work simultaneously to tighten the upper ring tube segment; S9: The pipe jacking equipment operates to complete the jacking work of the next ring of the tunnel. Repeat steps S1-S8 until all subsequent segments are assembled.

7. The anti-reverse device method for pipe jacking equipment according to claim 6, characterized in that: The segment in step S1 is a split design, which includes an upper ring segment and a lower ring segment. The upper ring segment and the lower ring segment can be spliced ​​together to form a complete ring segment.

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