Modular detachable machine head for deep foundation pit pipe jacking crossing

Abstract

The utility model relates to a modularization detachable machine head for deep foundation pit top pipe crossing, including cutter head main part, the outer periphery edge of cutter head main part is equipped with the baffle ring that protrudes upwards, the circumference of cutter head main part is evenly distributed with a plurality of radially arranged rib plate module, and the rib plate module is detachably connected with cutter head main part and baffle ring, and the circumference of cutter head main part is evenly distributed and is inserted with a plurality of radially arranged first drill bit module, and the first drill bit module is spaced apart and arranged with the rib plate module, and the central position of cutter head main part is detachably installed with second drill bit module, and the first drill bit module and second drill bit module are equipped with linkage locking mechanism between them. The utility model passes through the modularization design and the unique linkage locking mechanism, has solved the problem that the whole machine head is inconvenient to disassemble, is difficult to maintain, and is poor in adaptability.

Description

Technical Field

[0001] This utility model relates to the field of tunnel and trenchless construction equipment technology, and in particular to a modular and detachable machine head for deep foundation pit pipe jacking crossing. Background Technology

[0002] Pipe jacking is a trenchless pipeline laying technology widely used in projects that cross obstacles such as highways, railways, buildings, and rivers. A slurry-balanced pipe jacking machine is a crucial piece of equipment; its cutterhead at the front of the machine head is responsible for cutting the soil and using slurry pressure to balance the water and soil pressure at the excavation face.

[0003] In existing technologies, such as the Chinese utility model patent with publication number CN215804567U, a slurry-balanced pipe jacking head is disclosed. This head, by incorporating a stirring and separating mechanism with toothed assemblies, can push large rocks outwards, improving construction capabilities in gravel-bearing strata. However, such heads and their cutterheads are mostly welded integral structures or fixed connections, exhibiting significant drawbacks: First, during deep foundation pit, long-distance, or complex strata jacking operations, the cutterheads suffer severe wear, making replacement of the integral cutterhead difficult. The entire head must be lifted out of the working face, resulting in long maintenance cycles and high costs. Second, it is impossible to quickly replace suitable cutter modules according to different geological conditions (such as soft soil and hard rock), leading to poor adaptability. Finally, the large integral cutterheads are inconvenient to transport and hoist, especially in deep foundation pits with limited space, resulting in low construction flexibility.

[0004] Therefore, developing a modular pipe jacking head that can be quickly assembled and disassembled, easily repaired and replaced, and adapted to complex geological conditions is of great significance for improving the efficiency, economy and safety of deep foundation pit pipe jacking construction. Summary of the Invention

[0005] This invention aims to address the shortcomings of existing technologies by providing a modular, detachable jacking head for deep foundation pit pipe jacking.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a modular and detachable head for deep foundation pit pipe jacking, comprising a cutterhead body, an upwardly protruding retaining ring on the outer periphery of the cutterhead body, a plurality of radially arranged rib modules evenly distributed on the circumference of the cutterhead body, the rib modules being detachably connected to the cutterhead body and the retaining ring, a plurality of radially arranged first drill bit modules evenly inserted on the circumference of the cutterhead body, the first drill bit modules being spaced apart from the rib modules, a second drill bit module being detachably installed at the center of the cutterhead body, and a linkage locking mechanism being provided between the first drill bit module and the second drill bit module.

[0007] Specifically, the rib plate module is set close to the retaining ring and is fixedly connected to the retaining ring and the cutter head body by bolts. Multiple round holes are opened through the rib plate module to form the mud flow channel of the slurry balance system of the pipe jacking machine.

[0008] Specifically, the first drill bit module includes a first tool holder and several first tools mounted on the first tool holder. The bottom of the first tool holder is provided with several T-shaped sliders. The main body of the cutter head is provided with slots corresponding to the sliders, and one end of the slot is provided with a limiting block for vertically limiting the slider. The slider is inserted into the slot and slides toward the retaining ring so that the limiting block limits it.

[0009] Specifically, the first tool holder has a pin on the side facing the retaining ring, and the inner wall of the retaining ring has a slot corresponding to the pin, into which the pin is inserted.

[0010] Specifically, the second drill bit module includes a second tool holder and a second tool mounted on the second tool holder. Several fixing blocks are evenly distributed around the outer circumference of the second tool holder, and several positioning seats corresponding to the fixing blocks are provided on the main body of the cutter head. The fixing blocks are inserted into the positioning seats and fixed by bolts.

[0011] Specifically, the linkage locking mechanism includes a limiting groove disposed on the side of the first tool holder away from the retaining ring, a first wedge-shaped locking block slidably connected to the tool disc body corresponding to the limiting groove, and a second wedge-shaped locking block fixedly connected to the outer wall of the second tool holder and matching the first wedge-shaped locking block. When the second tool holder is installed, the second wedge-shaped locking block drives the first wedge-shaped locking block to slide along the limiting groove and press against the first tool holder.

[0012] The beneficial effects of this utility model are:

[0013] 1. The drill head is disassembled into independent units such as the cutterhead body, rib plate module, first drill bit module, and second drill bit module, all of which can be disassembled individually. This design greatly facilitates transportation, on-site assembly, and replacement of locally worn parts, eliminating the need to hoist the entire drill head and significantly reducing maintenance time and costs, making it particularly suitable for operations in deep foundation pits.

[0014] 2. The first drill bit module, through the T-shaped slider and radial slot, enables rapid radial insertion and removal. During installation, the second drill bit module in the center is tightened last. The second wedge-shaped locking block on the second module drives the first wedge-shaped locking block to move radially outward, thereby simultaneously clamping all the first drill bit modules. This mechanism achieves the effect of "central tightening and peripheral linkage locking," simplifying the operation steps, ensuring good connection rigidity, and providing safety and reliability.

[0015] 3. Different types and materials of cutter modules (first cutter, second cutter) can be pre-configured according to different strata (such as soft soil, gravel, rock) to achieve quick changeover, so that one machine head can adapt to a variety of geological conditions, improving the versatility and economy of the equipment.

[0016] 4. The circular holes on the rib module ensure the mud channel function required by the mud-water balance system, inheriting the advantages of existing technologies. At the same time, the cooperation between the insert and the slot further enhances the positioning accuracy and stability of the first drill bit module in the circumferential and radial directions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the linkage locking mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the slotted and limiting block structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the slider structure of this utility model;

[0021] In the diagram: 1-Cutter head body; 2-Retaining ring; 3-Rib plate module; 4-First drill bit module; 41-First tool holder; 42-First cutting tool; 43-Slider; 44-Slot; 45-Limiting block; 46-Insertion post; 47-Limiting groove; 48-First wedge locking block; 5-Second drill bit module; 51-Second tool holder; 52-Second cutting tool; 53-Fixing block; 54-Positioning seat; 55-Second wedge locking block.

[0022] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] like Figures 1-4 As shown, a modular, detachable cutter head for deep foundation pit pipe jacking includes a cutterhead body 1. The outer periphery of the cutterhead body 1 has an upwardly protruding retaining ring 2, which can be fixed by welding or bolting. The retaining ring 2 serves to provide an outer mounting reference and support for the rib plate module 3 and the first drill bit module 4, while also helping to maintain the overall rigidity of the cutterhead.

[0025] The cutterhead body 1 has several radially arranged rib modules 3 evenly distributed around its circumference. The rib modules 3 are detachably connected to the cutterhead body 1 and the retaining ring 2. The rib modules 3 are positioned close to the retaining ring 2 and are fixed to both the retaining ring 2 and the cutterhead body 1 by bolts. Multiple circular holes are drilled through the rib modules 3 to form the slurry flow channels of the slurry balance system of the pipe jacking machine. These circular holes are a key feature of the slurry balance pipe jacking machine; they constitute the main channels for slurry circulation, used to inject slurry into the excavation face to balance pressure, and to transport the mixture of cut excavated soil and slurry away.

[0026] A plurality of radially arranged first drill bit modules 4 are evenly inserted into the circumference of the cutter head body 1. The first drill bit modules 4 are spaced apart from the rib plate modules 3. Each first drill bit module 4 includes a first tool holder 41 and a plurality of first cutting tools 42 mounted on the first tool holder 41. The bottom of the first tool holder 41 is provided with a plurality of T-shaped sliders 43. The cutter head body 1 is provided with slots 44 corresponding to the sliders 43, and one end of the slot 44 is provided with a limiting block 45 for vertically limiting the sliders 43. The sliders 43 are inserted into the slots 44 and slide toward the retaining ring 2 so that the limiting block 45 limits them. During installation, the sliders 43 of the first drill bit modules 4 are aligned with the slots 44 and inserted, and then pushed toward the retaining ring 2 (radially outward) until the sliders 43 are blocked by the limiting block 45. The cooperation between the sliders 43 and the slots 44 ensures that the first drill bit modules 4 can only move radially along a predetermined path, achieving precise and rapid guiding and positioning, and avoiding the trouble of bolt hole alignment. The limit block 45 serves as a clear indication of the end point of the travel and a vertical limit, preventing the module from coming off during vibration.

[0027] To further improve stability, the first tool holder 41 is provided with a pin 46 facing the retaining ring 2. The inner wall of the retaining ring 2 has a slot corresponding to the pin 46, and the pin 46 is inserted into the slot. When the first drill module 4 slides into place, the pin 46 is precisely inserted into the slot. This design provides additional radial and circumferential constraints, effectively suppressing minor wobbling of the first drill module 4 during operation and enhancing the overall structural rigidity.

[0028] A second drill bit module 5 is detachably installed at the center of the cutter head body 1. The second drill bit module 5 includes a second tool holder 51 and a second cutting tool 52 mounted on the second tool holder 51. Several fixing blocks 53 are evenly distributed around the outer circumference of the second tool holder 51. Several positioning seats 54 corresponding to the fixing blocks 53 are provided on the cutter head body 1. The fixing blocks 53 are inserted into the positioning seats 54 and fixed by bolts. During installation, the fixing blocks 53 are first aligned and placed into the positioning seats 54 for initial positioning, and then tightened with bolts. The cooperation between the positioning seats 54 and the fixing blocks 53 ensures the rapid and accurate positioning of the second tool holder 51, and the bolt connection provides the final tightening force.

[0029] A linkage locking mechanism is provided between the first drill bit module 4 and the second drill bit module 5. The linkage locking mechanism includes a limiting groove 47 located on the side of the first tool holder 41 away from the retaining ring 2, a first wedge-shaped locking block 48 slidably connected to the cutter head body 1 corresponding to the limiting groove 47, and a second wedge-shaped locking block 55 fixedly connected to the outer wall of the second tool holder 51 and matching the first wedge-shaped locking block 48. When the second tool holder 51 is installed, the second wedge-shaped locking block 55 drives the first wedge-shaped locking block 48 to slide along the limiting groove 47 and press against the first tool holder 41. After all the first drill bit modules 4 have slid radially outward to the limiting block 45 for positioning, the second drill bit module 5 is installed. During the process of installing the second drill bit module 5 downward (towards the cutter head body 1) and tightening the bolts, the inclined surface of the second wedge-shaped locking block 55 will contact the inclined surface of the first wedge-shaped locking block 48, forcing the first wedge-shaped locking block 48 to slide radially outward. The sliding first wedge-shaped locking block 48 is finally pressed tightly into the limiting groove 47 of the first tool holder 41, thereby firmly locking all the first drill bit modules 4 from the inside and preventing them from retracting towards the center. The advantage of this linkage locking mechanism is that by fastening one central module, all the surrounding first drill bit modules 4 can be locked synchronously and automatically. The operation is extremely simple and efficient, and the locking force is uniform and reliable, perfectly solving the problem of rapid clamping of multiple modules.

[0030] During operation, the drive unit rotates the entire modular cutterhead, propelling it forward. The first cutter 42 and the second cutter 52 are responsible for cutting the soil. The circular holes on the rib module 3 ensure normal mud circulation. When specific worn parts need to be replaced, they can be disassembled simply in reverse order, eliminating the need to lift the entire cutter head out, thus significantly saving maintenance time and costs. This invention, through its modular design and unique linkage locking mechanism, solves the problems of inconvenient disassembly and assembly, difficult maintenance, and poor adaptability associated with integral cutter heads.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A modular, detachable cutter head for deep foundation pit pipe jacking, comprising a cutterhead body (1), characterized in that, The outer periphery of the cutter head body (1) is provided with an upwardly protruding retaining ring (2). Several radially arranged rib modules (3) are evenly distributed on the circumference of the cutter head body (1). The rib modules (3) are detachably connected to the cutter head body (1) and the retaining ring (2). Several radially arranged first drill modules (4) are evenly inserted on the circumference of the cutter head body (1). The first drill modules (4) are spaced apart from the rib modules (3). A second drill module (5) is detachably installed at the center of the cutter head body (1). A linkage locking mechanism is provided between the first drill module (4) and the second drill module (5).

2. The modular, detachable jacking head for deep foundation pit pipe jacking as described in claim 1, characterized in that, The rib module (3) is set close to the retaining ring (2) and is fixedly connected to the retaining ring (2) and the cutter head body (1) by bolts. Multiple round holes are opened through the rib module (3) to form the mud flow channel of the jacking machine mud-water balance system.

3. A modular, detachable jacking head for deep foundation pit pipe jacking as described in claim 1, characterized in that, The first drill bit module (4) includes a first tool holder (41) and several first tools (42) mounted on the first tool holder (41). The bottom of the first tool holder (41) is provided with several T-shaped sliders (43). The cutter head body (1) is provided with a slot (44) corresponding to the slider (43). One end of the slot (44) is provided with a limiting block (45) for vertically limiting the slider (43). The slider (43) is inserted into the slot (44) and slides toward the retaining ring (2) so that the limiting block (45) limits it.

4. A modular, detachable jacking head for deep foundation pit pipe jacking as described in claim 1, characterized in that, The first tool holder (41) has a pin (46) on the side facing the retaining ring (2). The inner wall of the retaining ring (2) has a slot corresponding to the pin (46), and the pin (46) is inserted into the slot.

5. A modular, detachable jacking head for deep foundation pit pipe jacking as described in claim 3, characterized in that, The second drill bit module (5) includes a second tool holder (51) and a second tool (52) mounted on the second tool holder (51). Several fixing blocks (53) are evenly distributed around the outer wall of the second tool holder (51). Several positioning seats (54) corresponding to the fixing blocks (53) are provided on the cutter head body (1). The fixing blocks (53) are inserted into the positioning seats (54) and fixed by bolts.

6. A modular, detachable jacking head for deep foundation pit pipe jacking as described in claim 5, characterized in that, The linkage locking mechanism includes a limiting groove (47) on the side of the first tool holder (41) away from the retaining ring (2), a first wedge-shaped locking block (48) slidably connected to the tool disc body (1) corresponding to the limiting groove (47), and a second wedge-shaped locking block (55) fixedly connected to the outer wall of the second tool holder (51) and matching the first wedge-shaped locking block (48). When the second tool holder (51) is installed, the second wedge-shaped locking block (55) drives the first wedge-shaped locking block (48) to slide along the limiting groove (47) and press against the first tool holder (41).

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