A silt-preventing structure for a cutter head of a pipe jacking machine
Through the synergistic design of layered cutting, composite crushing, and slurry mixing, the problems of insufficient cutting, inadequate crushing, and poor slag discharge of the pipe jacking machine cutterhead in different strata have been solved, achieving efficient slurry treatment and sealed slag discharge, thus improving the continuity and efficiency of construction.
Patent Information
- Application Number
- CN202521937546.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-09
AI Technical Summary
Existing pipe jacking machine cutterheads fail to cut finely or break up materials adequately in strata of varying hardness, resulting in poor slag removal, which leads to slag accumulation and equipment jamming, affecting construction progress and costs.
It adopts a full-process collaborative design of layered cutting, compound crushing, slurry mixing and sealed slag discharge. It includes the coordinated work of cutting components, crushing components and mixing components. Through the combined use of cross blades, arc blades, crushing rollers and mixing rods, multi-dimensional cutting and compound crushing are formed, and the slurry is treated and then sealed for discharge.
It effectively solves the problems of traditional cutterheads, such as insufficient cutting, inadequate crushing, and poor slag removal, reduces the frequency of construction interruptions, reduces wear, extends the life of core components, improves construction continuity and efficiency, and is adaptable to various geological formations.
Smart Images
Figure CN224679494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe jacking machine cutterhead structure, and in particular to a pipe jacking machine cutterhead anti-slag structure. Background Technology
[0002] With the continuous advancement of infrastructure construction such as municipal engineering, underground water supply and drainage pipelines, gas pipelines, and integrated pipe corridors, pipe jacking construction technology has become one of the core technologies for underground pipeline laying due to its advantages of not requiring large-scale ground excavation and having minimal impact on surrounding traffic and building environment. The cutterhead of the pipe jacking machine, as the "front-end actuator" in pipe jacking construction, primarily functions to cut the soil, break up mixed slag and rock, and smoothly discharge the slag. The anti-sludge performance of the cutterhead directly affects the construction progress, equipment failure rate, and construction cost—if sludge accumulates on the cutterhead, it can lead to increased cutting resistance and equipment load, or even cause the cutterhead to jam, requiring machine shutdown for cleaning, severely affecting the continuity of construction.
[0003] Currently, the anti-sludge design of existing pipe jacking machine cutterheads has obvious shortcomings: most cutterheads use a single type of cutting component, which cannot perform layered and refined processing of strata with different hardness. For example, when facing clay layers, it is easy to cut into clumps, and when facing sand and gravel layers, it is easy to leave unrefined soil particles, forming initial sludge. In order to address this technical problem, this application proposes an anti-sludge structure for pipe jacking machine cutterheads. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a slag-prevention structure for the cutterhead of a pipe jacking machine. It adopts a collaborative design that integrates layered cutting, compound crushing, slurry mixing, and sealed slag discharge throughout the entire process. This design can completely solve the problems of slag accumulation and equipment jamming caused by insufficient cutting, inadequate crushing, and poor slag discharge in traditional pipe jacking machine cutterheads, thereby reducing the frequency of construction interruptions.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A slag-prevention structure for a pipe jacking machine cutterhead includes a pipe jacking machine body. A water storage tank is fixedly connected to the middle of the front end of the pipe jacking machine body. A drive device is mounted on the front end of the water storage tank via a fixed frame. A baffle is fitted on the outer wall of the drive device. A rotating frame is connected to the front drive end of the drive device via a connecting rod. A first cutter holder is fixedly connected to the front side of the inner wall of the rotating frame. A second cutter holder is fixedly connected to the front end of the first cutter holder. Both the first and second cutter holders have cutting components at their front ends. A support frame is rotatably connected to the rear end of the first cutter holder. The rear end of the first support frame is fixedly connected to the front end of the drive device. A crushing component is fixedly connected to the outer wall of the first support frame. A stirring component is fixedly connected to the rear drive end of the drive device.
[0006] Furthermore, the cutting assembly includes a cutting head located at the junction of tool holder one and tool holder two, an arc-shaped cutting tool is fixedly connected to the front end of tool holder two, and a cross-shaped cutting tool is fixedly connected to the middle of the front end of tool holder two, with the cross-shaped cutting tool and the arc-shaped cutting tool being on the same plane.
[0007] Furthermore, the crushing assembly includes a support plate fixedly connected to the outer wall of the support frame, a crushing roller 1 rotatably connected to the front end of the support plate, a crushing roller 2 disposed on the outer periphery of the crushing roller 1, and the outer wall of the crushing roller 2 fixedly connected to the inner wall of the rotating frame.
[0008] Furthermore, the stirring assembly includes a second support frame located on the rear side of the outer wall of the driving device. A stirring rod is fixedly connected to the outer wall of the second support frame. The outer wall of the stirring rod is located at the rear end of the baffle and is located in the cavity at the front end of the main body of the pipe jacking machine.
[0009] Furthermore, the inner wall of the water storage tank is connected to a nozzle via a water pump, the nozzle is located on the outer wall of the water storage tank, and the water storage tank is connected to the water inlet at the rear end of the main body of the pipe jacking machine via a pipe.
[0010] Furthermore, a pump body is fixedly connected to the bottom front end of the main body of the pipe jacking machine, and the pump body is connected to the mud outlet at the rear end of the main body of the pipe jacking machine through a pipeline.
[0011] Furthermore, the rear end of the pipe jacking machine body is rotatably connected to the front end of the pipe jacking machine body via a sealing ring.
[0012] This utility model has the following beneficial effects: 1. This utility model adopts a collaborative design of layered cutting, compound crushing, slurry mixing, and sealed slag discharge throughout the entire process, which can completely solve the problems of slag accumulation and equipment jamming caused by insufficient cutting, inadequate crushing, and poor slag discharge of traditional pipe jacking machine cutter heads, thereby reducing the frequency of construction interruptions; at the same time, it can reduce the direct wear of slag on the cutter head and crushing roller, extend the service life of core components, and significantly improve the continuity and overall efficiency of pipe jacking construction.
[0013] 2. In this utility model, relying on the flexible crushing capability of the combined revolution and rotation crushing structure, the anti-slag structure of the pipe jacking machine cutterhead eliminates the need to adjust the crushing component parameters for different slag particle sizes, thus adapting to complex strata such as sand and gravel layers and weathered rock layers containing large pieces of gravel. Compared to existing pipe jacking machine cutterheads that require frequent replacement of crushing parts to cope with different strata, this structure significantly reduces the number of downtime adjustments caused by stuck stones, significantly improves construction continuity, and reduces additional construction costs caused by strata adaptation issues. Attached Figure Description
[0014] Figure 1 This is a perspective view of a jacking machine cutterhead anti-slag structure proposed in this utility model; Figure 2This is a schematic diagram of the main structure of a pipe jacking machine, which is proposed in this utility model to provide a slag-preventing structure for the cutterhead of the pipe jacking machine. Figure 3 This is a schematic diagram of the cross-cutting structure of the anti-sludge structure of the cutterhead of a pipe jacking machine proposed in this utility model; Figure 4 This is a schematic diagram of the crushing roller structure of the anti-sludge structure of the cutterhead of a pipe jacking machine proposed in this utility model; Figure 5 This is a schematic diagram of the support plate structure of the anti-slag structure of the cutterhead of a pipe jacking machine proposed in this utility model; Figure 6 This is a schematic diagram of the connecting rod structure of the anti-slag structure of the cutterhead of a pipe jacking machine proposed in this utility model; Figure 7 This is a schematic diagram of the stirring rod structure of the anti-sludge structure of the cutterhead of a pipe jacking machine proposed in this utility model; Figure 8 This is a schematic diagram of the baffle structure of the anti-slag structure of the cutterhead of a pipe jacking machine proposed in this utility model.
[0015] Legend: 1. Pipe jacking machine main body; 2. Rotating frame; 3. Cutter holder one; 4. Cutter holder two; 5. Cutter head; 6. Arc-shaped cutter; 7. Cross cutter; 8. Support frame one; 9. Support plate; 10. Crushing roller one; 11. Crushing roller two; 12. Drive equipment; 13. Connecting rod; 14. Baffle; 15. Water storage tank; 16. Nozzle; 17. Support frame two; 18. Stirring rod; 19. Pump body. Detailed Implementation
[0016] 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.
[0017] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7An embodiment of this utility model provides a structure for preventing sedimentation of a pipe jacking machine cutterhead, including a pipe jacking machine body 1, a water storage tank 15 fixedly connected to the middle of the front end of the pipe jacking machine body 1, a drive device 12 installed at the front end of the water storage tank 15 via a fixed frame, a baffle 14 sleeved on the outer wall of the drive device 12, a rotating frame 2 connected to the front drive end of the drive device 12 via a connecting rod 13, a first cutter holder 3 fixedly connected to the front side of the inner wall of the rotating frame 2, a second cutter holder 4 fixedly connected to the front end of the first cutter holder 3, cutting components provided at the front ends of both the first cutter holder 3 and the second cutter holder 4, a support frame 8 rotatably connected to the rear end of the first cutter holder 3, a rear end of the support frame 8 fixedly connected to the front end of the drive device 12, a crushing component fixedly connected to the outer wall of the support frame 8, and a stirring component fixedly connected to the rear drive end of the drive device 12; Specifically, the drive device 12 is a dual-axis motor. During the construction start-up phase, the drive device 12 serves as the core power source, transmitting rotational torque stably to the rotating frame 2 via the connecting rod 13, causing the rotating frame 2 to rotate uniformly around the axis of the drive device 12. Since the tool holder 3 is rigidly fixed to the front side of the inner wall of the rotating frame 2, and the tool holder 4 is tightly connected to the front end of the tool holder 3, the rotation of the rotating frame 2 will synchronously drive the tool holder 3, the tool holder 4, and the cutting components at their front ends to rotate synchronously, providing a stable power foundation for subsequent soil cutting. At the same time, the main body 1 of the pipe jacking machine moves forward as a whole, ensuring that the cutting components continue to be in contact with the soil in front, avoiding soil backflow or sediment accumulation due to interruption of advancement.
[0018] Reference Figure 3 , Figure 4 , Figure 5 and Figure 8 The cutter head 5 is located at the junction of cutter holder 1 3 and cutter holder 2 4. An arc-shaped cutter 6 is fixedly connected to the front end of cutter holder 2 4. A cross cutter 7 is fixedly connected to the middle of the front end of cutter holder 2 4. The cross cutter 7 and the arc-shaped cutter 6 are on the same plane. A support plate 9 is fixedly connected to the outer wall of support frame 1 8. A crushing roller 10 is rotatably connected to the front end of support plate 9. A crushing roller 2 11 is provided on the outer periphery of crushing roller 10. The outer wall of crushing roller 2 11 is fixedly connected to the inner wall of rotating frame 2. A support frame 2 17 is located on the rear side of the outer wall of drive device 12. The outer wall of support frame 2 17 is fixed. A stirring rod 18 is connected, and the outer wall of the stirring rod 18 is set at the rear end of the baffle 14. The outer wall of the stirring rod 18 is set in the cavity at the front end of the main body 1 of the pipe jacking machine. A nozzle 16 is connected to the inner wall of the water storage tank 15 through a water pump. The nozzle 16 is set on the outer wall of the water storage tank 15. The water storage tank 15 is connected to the water inlet at the rear end of the main body 1 of the pipe jacking machine through a pipe. A pump body 19 is fixedly connected to the bottom side of the front end of the main body 1 of the pipe jacking machine. The pump body 19 is connected to the mud outlet at the rear end of the main body 1 of the pipe jacking machine through a pipe. The rear end of the main body 1 of the pipe jacking machine is rotatably connected to the front end of the main body 1 of the pipe jacking machine through a sealing ring. Specifically, in the soil layering cutting stage: the cutting components adopt a collaborative logic of "first wide-area dispersion, then precise crushing". The cross blade 7 and the arc blade 6 are on the same plane. When rotating, the cross blade 7 first makes a cross-shaped cut on the soil layer in front, dividing the soil into multiple small areas and reducing the overall cutting resistance. The arc blade 6 expands the single cutting range with the help of the arc-shaped cutting edge, and guides the divided soil to both sides to avoid local soil accumulation and the formation of initial sediment. Then, the cutter head 5, located at the junction of the first cutter holder 3 and the second cutter holder 4, targets the remaining harder soil. Secondary precision crushing of layers or small-diameter crushed stones further refines soil particles, reducing the load on subsequent crushing stages and decreasing the probability of sediment generation from the source. Large slag and stone composite crushing stage: When there are large, hard stones in the stratum, the main body 1 of the pipe jacking machine will carry the stones and surrounding soil together to the front of the baffle 14 during the advancement process. The baffle 14 is fitted on the outer wall of the drive equipment 12. The ring structure can prevent slag and stone from spreading into the equipment gap. Its special design of "thick at the top and thin at the bottom" guides the slag and stone to gather at the lower gap, avoiding the slag and stone from scattering everywhere. At this time, the second crushing roller 11 revolves around the rotating frame 2. When the stone enters the gap between the first crushing roller 10 and the second crushing roller 11, the revolving squeezing force of the second crushing roller 11 and the reaction force of the stone together cause the first crushing roller 10 to rotate freely around the support plate 9, forming a composite crushing mode of "revolution + rotation". This avoids the "slippage" or "jamming" problem caused by the traditional single crushing roller only revolving. It efficiently crushes large stones to meet the subsequent slag discharge requirements. In the slag slurry treatment and slag-free discharge stage, the crushed slag and stone mixture enters the front cavity of the main body 1 of the pipe jacking machine through the notch below the baffle 14. The water storage tank 15 continuously replenishes clean water through the rear water inlet. The built-in high-pressure water pump pressurizes the water and delivers it to the nozzle 16. The nozzle 16 is distributed in a ring along the outer wall of the water storage tank 15, spraying water evenly into the cavity. On the one hand, it reduces construction dust pollution, and on the other hand, it mixes dry slag and water to form a slurry with good fluidity, reducing the adhesion and sedimentation of slag on the inner wall of the cavity. Simultaneously, the drive device 12 drives the support frame 17 and the stirring rod 18 fixed on the outer wall to rotate synchronously. The stirring rod 18 adopts a spiral blade design to fully stir the slurry in the cavity, ensuring uniform slurry concentration and avoiding local dry slag sedimentation. Finally, the pump body 19 extracts the uniform slurry under negative pressure to the ground treatment equipment through the rear mud outlet. The sealing ring at the rear end of the pipe jacking machine body 1 ensures cavity sealing, preventing slurry leakage from polluting the underground environment or seeping into the equipment, achieving a construction effect without sediment accumulation throughout the process. The outer circumference of the crushing roller 1 is evenly distributed with raised teeth, and the inner wall of the crushing roller 2 has grooves at positions corresponding to the raised teeth. The raised teeth and grooves mesh with each other, and the axes of the crushing roller 1 and the crushing roller 2 are parallel to the rotation axis of the rotating frame.
[0019] Working principle: After the equipment is started, the drive device 12 first drives the rotating frame 2 to rotate stably through the connecting rod 13, and then synchronously drives the first cutter holder 3, the second cutter holder 4, and the front cutter head 5, the arc cutter 6, and the cross cutter 7 to rotate, forming a multi-dimensional cutting system—the cutter head 5 breaks through hard soil, the arc cutter 6 expands the cutting range, and the cross cutter 7 refines the soil, initially breaking up the underground soil. If the soil contains large stones, the main body 1 of the pipe jacking machine will carry the slag to the front of the baffle 14 when it advances. The baffle 14 prevents the slag from spreading and guides it to gather at the lower opening; at the same time, the crushing... Roller 11 revolves with the rotating frame 2, forming a "revolution + rotation" composite crushing with crushing roller 10 fixed on the support plate 9, crushing large stones into small particles. After the crushed slag mixture enters the front cavity of the main body 1 of the pipe jacking machine, the water storage tank 15 sprays water through the nozzle 16 to make the slag and soil form a fluid slurry. The stirring rod 18 is driven by the drive equipment to stir the slurry to ensure uniform concentration. Finally, the pump body 19 pumps the slurry to the ground. There is no sediment accumulation throughout the process, and the sealing ring ensures the cavity is sealed, which is suitable for construction in various complex strata such as clay and gravel.
[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. A slag-prevention structure for a pipe jacking machine cutterhead, characterized in that: The device includes a main body (1) of a pipe jacking machine. A water storage tank (15) is fixedly connected to the middle of the front end of the main body (1). A drive device (12) is installed at the front end of the water storage tank (15) through a fixed frame. A baffle (14) is fitted on the outer wall of the drive device (12). A rotating frame (2) is connected to the front drive end of the drive device (12) through a connecting rod (13). A first blade holder (3) is fixedly connected to the front side of the inner wall of the rotating frame (2). A second blade holder (4) is fixedly connected to the front end of the first blade holder (3). Both the first blade holder (3) and the second blade holder (4) are provided with cutting components at their front ends. A first support frame (8) is rotatably connected to the rear end of the first blade holder (3). The rear end of the first support frame (8) is fixedly connected to the front end of the drive device (12). A crushing component is fixedly connected to the outer wall of the first support frame (8). A stirring component is fixedly connected to the rear drive end of the drive device (12). The cutting assembly includes a cutting head (5) located at the junction of tool holder one (3) and tool holder two (4). An arc-shaped cutter (6) is fixedly connected to the front end of tool holder two (4), and a cross cutter (7) is fixedly connected to the middle of the front end of tool holder two (4). The cross cutter (7) and the arc-shaped cutter (6) are on the same plane.
2. The anti-slag-accumulation structure for a pipe jacking machine cutterhead according to claim 1, characterized in that: The crushing assembly includes a support plate (9) fixedly connected to the outer wall of the support frame (8), a crushing roller (10) rotatably connected to the front end of the support plate (9), a crushing roller (11) is provided on the outer periphery of the crushing roller (10), and the outer wall of the crushing roller (11) is fixedly connected to the inner wall of the rotating frame (2).
3. The anti-slag-accumulation structure for a pipe jacking machine cutterhead according to claim 1, characterized in that: The stirring assembly includes a support frame two (17) located on the rear side of the outer wall of the drive device (12). The outer wall of the support frame two (17) is fixedly connected to a stirring rod (18). The outer wall of the stirring rod (18) is located at the rear end of the baffle (14). The outer wall of the stirring rod (18) is located in the cavity at the front end of the main body (1) of the pipe jacking machine.
4. The anti-slag-accumulation structure for a pipe jacking machine cutterhead according to claim 1, characterized in that: The inner wall of the water storage tank (15) is connected to a nozzle (16) via a water pump. The nozzle (16) is installed in the storage tank. The outer wall of the water tank (15) is connected to the water inlet at the rear end of the main body (1) of the pipe jacking machine via a pipe.
5. The anti-slag-accumulation structure for a pipe jacking machine cutterhead according to claim 1, characterized in that: A pump body (19) is fixedly connected to the bottom front end of the main body (1) of the pipe jacking machine. The pump body (19) is connected to the mud outlet at the rear end of the main body (1) of the pipe jacking machine through a pipe.
6. The anti-slag-accumulation structure for a pipe jacking machine cutterhead according to claim 1, characterized in that: The rear end of the main body (1) of the pipe jacking machine is rotatably connected to the front end of the main body (1) of the pipe jacking machine via a sealing ring.