Automatic clamping device of subway tunnel micro-disturbance grouting reinforcement hydraulic pipe inserting machine

Abstract

This utility model discloses an automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels. The cylinder telescopic structure includes a clamping cylinder and a cylinder moving frame. The clamping cylinder is fitted outside a hollow telescopic rod, and its output end is fixedly connected to the cylinder moving frame. The connecting structure includes a connecting block, a sleeve connecting block, and a fixed clamping sleeve. The upper part of the connecting block is mechanically threaded to the hollow telescopic rod, and the lower part of the connecting block is sealed to the clamping cylinder. The sleeve connecting block is mechanically threaded to the hollow telescopic rod and the clamping sleeve of the clamping structure. The fixed clamping sleeve is mechanically threaded to the sleeve connecting block. The clamping structure includes a clamping sleeve and a sleeve moving block. The lower end of the grouting pipe, which extends from the hollow telescopic rod, passes through the clamping sleeve. The sleeve moving block is clamped outside the clamping sleeve and fixedly connected to the cylinder moving frame. This automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels can automatically clamp the grouting pipe hydraulically, optimizing the deformation repair and reinforcement effect and improving the efficiency of micro-disturbance grouting construction in tunnels.

Description

Technical Field

[0001] This utility model relates to the field of tunnel lining structure deformation repair technology, and in particular to an automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels. Background Technology

[0002] With economic development and the continuous increase in subway operating mileage, more and more construction projects are being built near subway lines, and the scale of these projects is also increasing, inevitably causing significant deformation of subway tunnels. In recent years, the micro-disturbance grouting method, as a technique with minimal impact on the surrounding environment, high controllability, and good reinforcement effect, has become an important means of repairing subway tunnel deformation.

[0003] Settlement and convergence deformation are of particular concern in subway tunnel deformation. The repair method for settlement deformation typically involves drilling a hole downwards from the bottom of the tunnel, penetrating the tunnel segments, and then inserting grouting pipes into the underlying soil to lift and grout the tunnel. The repair method for convergence deformation typically involves vertically inserting grouting pipes from the ground at a certain distance on both sides of the tunnel, grouting the tunnel laterally, and reducing the tunnel's transverse diameter through the lateral pressure of the grout.

[0004] Over time, subway tunnels undergo varying degrees of longitudinal deformation in certain sections, leading to issues such as track bed separation from tunnel segments and water leakage. The factors causing longitudinal deformation are complex, including those from the tunnel construction phase, those occurring after subway operation, those inherent to the system itself, and those caused by changes in the surrounding environment. These factors primarily manifest as inadequate planning during construction or potential hazards left unaddressed during tunnel boring machine (TBM) advancement; differential settlement caused by long-term train operation vibrations; the impact of hundreds of new, renovated, and expanded projects and municipal engineering projects within the subway safety protection zone on the subway structure; and the increasing number of subway tunnels and underground pipelines crossing existing operational tunnels, causing differential settlement issues. If differential settlement in operational tunnels is not controlled promptly and allowed to develop, it will compromise the operational safety of the subway.

[0005] Currently used grouting methods include compaction grouting, jet grouting, and fracturing grouting. Although their construction methods differ, they all only specify the grouting volume and pressure parameters, neglecting the fine-grained control of the grouting process. This may be sufficient for favorable geological or environmental conditions. Furthermore, existing grouting technologies often directly place holes at the location of a single protected object, failing to consider the complex surrounding environment. The hole placement is relatively simple, generally only considering the final grouting effect without addressing the disturbance during the grouting process, often leading to counterproductive results. Especially in situations with extremely high environmental protection requirements, particularly when deformation needs to be controlled within millimeter-level ranges, important parameters such as grouting flow rate, number of grouting cycles, and pipe extraction speed can generate significant self-disturbance. Therefore, the degree of precision in these parameters is crucial for achieving construction control objectives. Improper process control can often result in grouting methods intended for reinforcement causing greater disturbance to the geological formation, making it impossible to achieve control targets. This often necessitates the use of large-scale micro-disturbance grouting machinery, thus limiting the flexibility and efficiency of construction.

[0006] In conclusion, it is necessary to design an automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels, in order to optimize the deformation repair and reinforcement effect and improve the construction efficiency and equipment flexibility of micro-disturbance grouting in tunnels. Utility Model Content

[0007] The technical problem to be solved by this utility model is to address the low flexibility and low efficiency of existing large-scale micro-disturbance grouting machinery and equipment, and to propose a new automatic clamping device for hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels.

[0008] To solve the above-mentioned technical problems, this utility model provides an automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels, including: a cylinder telescopic structure, a connecting structure, and a clamping structure;

[0009] The hydraulic cylinder telescopic structure includes a clamping hydraulic cylinder and a hydraulic cylinder moving frame. The clamping hydraulic cylinder is fitted outside the hollow telescopic rod, and its output end is fixedly connected to the hydraulic cylinder moving frame.

[0010] The linking structure includes a linking block, a sleeve connecting block, and a fixed clamping sleeve. The upper part of the linking block is mechanically threaded to the hollow telescopic rod, and the lower part of the linking block is sealed to the clamping cylinder. The sleeve connecting block is mechanically threaded to the hollow telescopic rod and the clamping sleeve of the clamping structure. The fixed clamping sleeve is mechanically threaded to the sleeve connecting block.

[0011] The clamping structure includes a clamping sleeve and a sleeve moving block. The lower end of the grouting pipe, which passes through the hollow telescopic rod, passes through the clamping sleeve. The sleeve moving block is clamped on the outside of the clamping sleeve and is fixedly connected to the cylinder moving frame.

[0012] In a preferred embodiment of this solution, the lower end of the sleeve connecting block is located between the fixed clamping sleeve and the clamping sleeve.

[0013] Furthermore, the clamping sleeve includes an upper clamping head and a lower tapered sleeve. The clamping head is inserted into the sleeve connecting block, and the outer diameter of the tapered sleeve increases from top to bottom, matching the inner diameter of the sleeve moving block.

[0014] Implementing this utility model has the following beneficial effects:

[0015] The automatic clamping device of the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels can automatically clamp the grouting pipe hydraulically to optimize the deformation repair and reinforcement effect and improve the construction efficiency of micro-disturbance grouting in the tunnel.

[0016] This automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels uses a hydraulic cylinder to achieve rapid clamping / release, significantly shortening the insertion and extraction time of the grouting pipe. It is especially suitable for micro-disturbance grouting scenarios (such as micro-disturbance grouting inside tunnels).

[0017] The automatic clamping device of the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels adopts modular threaded connection to reduce redundant structure, which conforms to the design concept of quick locking of mechanical standard parts. At the same time, mechanical self-locking is achieved by controlling the gap between the sleeve moving block and the clamping sleeve, without the need for additional power to maintain the clamping state. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A cross-sectional structural schematic diagram of the automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels provided by this utility model;

[0020] Figure 2 A schematic diagram of the external structure of the automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels provided by this utility model;

[0021] In the diagram: clamping cylinder 1, cylinder moving frame 2, hollow telescopic rod 3, grouting pipe 4, connecting block 5, sleeve connecting block 6, fixed clamping sleeve 7, clamping sleeve 8, and sleeve moving block 9. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2 , Figure 1 A cross-sectional structural schematic diagram of the automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels provided by this utility model; Figure 2 This utility model provides an external structural schematic diagram of the automatic clamping device for a hydraulic pipe insertion machine used for micro-disturbance grouting reinforcement in subway tunnels. The automatic clamping device includes: a cylinder telescopic structure, a connecting structure, and a clamping structure.

[0024] The hydraulic cylinder telescopic structure includes a clamping hydraulic cylinder 1 and a hydraulic cylinder moving frame 2. The clamping hydraulic cylinder 1 is fitted outside the hollow telescopic rod 3, and its output end is fixedly connected to the hydraulic cylinder moving frame 2.

[0025] The hollow telescopic rod 3 has a hollow structure in the middle, through which the grouting pipe 4 passes to form a grouting pipe insertion channel. Under the action of the matching telescopic cylinder, it moves back and forth along the axis (continuous and uniform telescopic movement). This structure is the rest of the structure of the hydraulic insertion machine and does not belong to the device of this application, so it will not be explained in detail.

[0026] The linking structure includes a linking block 5, a sleeve connecting block 6, and a fixed clamping sleeve 7. The upper part of the linking block 5 is mechanically threaded to the hollow telescopic rod 3, and the lower part of the linking block 5 is sealed to the clamping cylinder 1. The sleeve connecting block 6 is mechanically threaded to the hollow telescopic rod 3 and the clamping sleeve 8 of the clamping structure. The fixed clamping sleeve 7 is mechanically threaded to the sleeve connecting block 6.

[0027] The clamping structure includes a clamping sleeve 8 and a sleeve moving block 9. The lower end of the grouting pipe 4, which passes through the hollow telescopic rod 3, passes through the clamping sleeve 8. The sleeve moving block 9 is clamped on the outside of the clamping sleeve 8 and is fixedly connected to the oil cylinder moving frame 2.

[0028] The lower end of the sleeve connecting block 6 is located between the fixed clamping sleeve 7 and the clamping sleeve 8. The clamping sleeve 8 includes an upper clamping head and a lower tapered sleeve. The clamping head is inserted into the sleeve connecting block 6. The outer diameter of the tapered sleeve increases from top to bottom and is matched with the inner diameter of the sleeve moving block 9.

[0029] The clamping cylinder 1 can drive the sleeve moving block 9 to move upward along the hollow telescopic rod 3 via the cylinder moving frame 2; when the sleeve moving block 9 moves upward along the hollow telescopic rod 3, the gap between the sleeve moving block 9 and the clamping sleeve 8 gradually increases, and the clamping sleeve 8 opens; when the sleeve moving block 9 moves downward along the hollow telescopic rod 3, the gap between the sleeve moving block 9 and the clamping sleeve 8 gradually decreases, and the clamping sleeve 8 gradually locks the opening, clamping the grouting pipe 4.

[0030] Specific working principle: The automatic clamping device of the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels consists of core components such as clamping cylinders, connecting blocks, and sleeve connecting blocks, and is modularly assembled through mechanical threaded connections. Its working principle is based on the following linkage mechanism:

[0031] Hydraulic cylinder telescopic drive: The clamping cylinder pushes the sleeve moving block to move axially along the hollow telescopic rod via the cylinder moving frame. When moving upward, the gap between the sleeve moving block and the clamping sleeve increases, and the clamping sleeve opening releases the grouting pipe; when moving downward, the gap decreases, and the clamping sleeve locks the grouting pipe through mechanical deformation. This design is similar to the principle of hydraulic wedge self-locking, converting axial force into radial clamping force to ensure clamping stability.

[0032] Threaded connection and sealing: The mechanical threaded connection between the connecting block and the hollow telescopic rod and the clamping cylinder, combined with the sealing structure, ensures both strength and prevents hydraulic oil leakage, similar to the self-centering clamping device design of a spring collet.

[0033] The automatic clamping device of the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels achieves efficient and adjustable clamping function through the coordinated design of hydraulic drive and mechanical self-locking.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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. An automatic clamping device for a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels, characterized in that, include: Hydraulic cylinder telescopic structure, connecting structure, and clamping structure; The hydraulic cylinder telescopic structure includes a clamping hydraulic cylinder and a hydraulic cylinder moving frame. The clamping hydraulic cylinder is fitted outside the hollow telescopic rod, and its output end is fixedly connected to the hydraulic cylinder moving frame. The linking structure includes a linking block, a sleeve connecting block, and a fixed clamping sleeve. The upper part of the linking block is mechanically threaded to the hollow telescopic rod, and the lower part of the linking block is sealed to the clamping cylinder. The sleeve connecting block is mechanically threaded to the hollow telescopic rod and the clamping sleeve of the clamping structure. The fixed clamping sleeve is mechanically threaded to the sleeve connecting block. The clamping structure includes a clamping sleeve and a sleeve moving block. The lower end of the grouting pipe that passes through the hollow telescopic rod passes through the clamping sleeve. The sleeve moving block is clamped outside the clamping sleeve and is fixedly connected to the cylinder moving frame.

2. The automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels according to claim 1, characterized in that, The lower end of the sleeve connecting block is located between the fixed clamping sleeve and the clamping sleeve.

3. The automatic clamping device for the hydraulic pipe insertion machine for micro-disturbance grouting reinforcement of subway tunnels according to claim 2, characterized in that, The clamping sleeve includes an upper clamping head and a lower tapered sleeve. The clamping head is inserted into the sleeve connecting block. The outer diameter of the tapered sleeve increases from top to bottom and is matched with the inner diameter of the sleeve moving block.

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