TRD construction method machine cutter head structure suitable for complex geological conditions

Abstract

The utility model provides a kind of TRD construction method machine cutterhead structure suitable for complex geological conditions, including cutting box, chain, tool bit assembly and fastener, chain is installed in cutting box outside, tool bit assembly is fixedly connected on chain by fastener, tool bit assembly includes tool holder, first cutter, second cutter and torsion shaft;The first end of torsion shaft is fixedly connected on tool holder, the second end of torsion shaft extends towards perpendicular to the direction of chain, first cutter and second cutter are all fixedly connected on the extension end of torsion shaft, the cutting edge of first cutter is arranged towards the direction of chain movement, second cutter is arranged in the cutting edge side of first cutter, the width of first cutter is wider than the width of second cutter.The first cutter and second cutter are installed on torsion shaft in the application, soft formation is cut by wider first cutter;Hard rock layer is cut by narrower first cutter, and can be suitable for cutting of soft formation and hard rock layer.

Description

Technical Field

[0001] This utility model relates to the field of TRD machining tool technology, specifically to a TRD machining tool disc structure adapted to complex geological conditions. Background Technology

[0002] The TRD construction method machine, as an advanced underground continuous wall construction equipment, works on the principle of vertically inserting a chainsaw-type cutter box into the stratum and then moving it horizontally. At the same time, the chain drives the cutter to rotate up and down, mixing the original soil and injecting cement slurry, thereby forming a continuous wall of uniform thickness underground.

[0003] When dealing with complex and diverse geological conditions, existing TRD cutting machines have revealed some obvious shortcomings. The cutting blades of existing TRD cutting machines are fixedly connected to the cutting chain, and the angle and size of the blades are fixed. When cutting ordinary clay layers, the cutting efficiency is relatively fast, but when working in hard rock strata or gravel-rich soil layers, the cutting efficiency of existing TRD cutting machine blades is low because the large working area of ​​the blades results in high cutting resistance.

[0004] In summary, there is an urgent need for a cutterhead structure for TRD (Transformer Detector) machines that can adapt to complex geological conditions in order to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide a cutterhead structure for a TRD (Take-Off) cutting machine that is adaptable to complex geological conditions, aiming to solve the problem that existing cutterhead structures cannot be well adapted to cutting both hard rock and clay layers simultaneously. The specific technical solution is as follows:

[0006] A cutter head structure for a TRD (Tracking Method) machine adapted to complex geological conditions includes a cutting housing, a chain, a cutter head assembly, and fasteners. The chain is installed on the outside of the cutting housing, and the cutter head assembly is fixedly connected to the chain by fasteners. The cutter head assembly includes a cutter holder, a first cutter, a second cutter, and a torsion shaft. The first end of the torsion shaft is fixedly connected to the cutter holder, and the second end of the torsion shaft extends in a direction perpendicular to the chain. Both the first and second cutters are fixedly connected to the extended end of the torsion shaft. The cutting edge of the first cutter is arranged facing the direction of chain movement, and the second cutter is arranged on one side of the cutting edge of the first cutter. The width of the first cutter is wider than the width of the second cutter.

[0007] Furthermore, the cutter head assembly also includes a support base, which is fixedly connected to the cutter holder, and the extension end of the torsion shaft is rotatably connected to the support base.

[0008] Furthermore, the cutter head assembly also includes a set screw, an elongated countersunk hole on the support base, a threaded hole on the cutter holder, the set screw passing through the elongated countersunk hole and threadedly connected to the threaded hole; the cutter holder is provided with an insertion hole, the torsion shaft is inserted and fixedly connected in the insertion hole, the torsion shaft is provided with a positioning boss, the positioning boss and the cutter holder abutting and limitingly engaging along the axial direction of the torsion shaft.

[0009] Furthermore, the first cutter is arranged at an acute angle to the length direction of the chain.

[0010] Furthermore, the first cutter is provided with a first wear-resistant cutter head, which is arranged in a flat shape; the second cutter is provided with a second wear-resistant cutter head, which is arranged in a conical shape.

[0011] Furthermore, both the outer sides of the first cutter and the outer sides of the second cutter are covered with a wear-resistant layer.

[0012] Furthermore, multiple sets of cutter head assemblies are arranged, and these multiple sets of cutter head assemblies are arranged alternately on the cutter holder.

[0013] Furthermore, the chain includes multiple links and multiple pins, with the links connected end to end in sequence via the pins. Each link has a mounting hole, and the tool holder is fixedly mounted on the link through the mounting hole.

[0014] Furthermore, a tool holder is installed on the chain every N links, where N is greater than or equal to 1.

[0015] Furthermore, the fasteners are bolts, and the tool holder is fixedly connected to the chain by bolts.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] When cutting through strata, the first cutter first contacts the stratum. If the stratum is a hard rock layer, the first cutter experiences greater friction due to its larger contact area. This causes the first and second cutters to rotate simultaneously, bringing the second cutter into contact with the rock layer. As the chain moves, the second cutter cuts through the rock layer. During the cutting process, the second cutter, being narrower than the first, applies greater pressure to the rock layer, making it easier to cut. Simultaneously, the torsion shaft is twisted, accumulating elastic potential energy. When transitioning from cutting rock layers to cutting softer strata such as clay, the friction experienced by the first and second cutters is less than the torsional force of the torsion shaft. This causes the torsion shaft to rotate the first and second cutters back, restoring the first cutter to contact the clay layer. The wider first cutter then cuts through the clay layer quickly. Through the above structural improvements, it is possible to cut both hard rock layers and soft clay layers simultaneously, and the cutting speed can be increased, making the device adaptable to strata cutting under complex geological conditions.

[0018] Meanwhile, by setting up a torsion shaft, when the first cutter or the second cutter is impacted, the torsion shaft can be torsional deformed in time to prevent the first cutter or the second cutter from being damaged by the impact.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-4 The present invention will be described in further detail below. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of a TRD method cutterhead structure adapted to complex geological conditions according to the present application.

[0022] Figure 2 This is an exploded view of the cutter head assembly in the cutter head structure of a TRD method machine adapted to complex geological conditions, according to the present application.

[0023] Figure 3 This is a cross-sectional view of the cutter head assembly in the cutter head structure of a TRD method machine adapted to complex geological conditions according to the present application.

[0024] Figure 4 yes Figure 1 A magnified view of point A in the middle.

[0025] The components include: 1. Cutting box; 2. Chain; 21. Chain link; 211. Mounting hole; 22. Chain pin; 3. Cutter head assembly; 31. Cutter holder; 311. Threaded hole; 312. Insertion hole; 32. First cutter; 321. First wear-resistant cutter head; 322. Wear-resistant layer; 33. Second cutter; 331. Second wear-resistant cutter head; 34. Torsion shaft; 341. Positioning boss; 35. Support base; 351. Long countersunk hole; 36. Set screw; 4. Fastener; 5. Third cutter. Detailed Implementation

[0026] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] Example:

[0029] See Figures 1-4 This embodiment provides a cutter head structure for a TRD (Tracking Method) machine adapted to complex geological conditions, including a cutting box 1, a chain 2, a cutter head assembly 3, and fasteners 4. The chain 2 is installed on the outside of the cutting box 1, and the cutter head assembly 3 is fixedly connected to the chain 2 by the fasteners 4. The cutter head assembly 3 includes a cutter holder 31, a first cutter 32, a second cutter 33, and a torsion shaft 34. The first end of the torsion shaft 34 is fixedly connected to the cutter holder 31, and the second end of the torsion shaft 34 extends in a direction perpendicular to the chain 2. The first cutter 32 and the second cutter 33 are both fixedly connected to the extended end of the torsion shaft 34. The cutting edge of the first cutter 32 is arranged in the direction of movement of the chain 2, and the second cutter 33 is arranged on one side of the cutting edge of the first cutter 32. The width of the first cutter 32 is wider than the width of the second cutter 33. It should be noted that a power assembly is also included. The power assembly drives the chain 2 to move around the cutting box 1. Figure 1 Not shown in the image.

[0030] Specifically, during the cutting process, different geological strata are encountered at different heights at the same location, such as soft clay layers, hard rock layers, or gravel-rich soil layers. These strata of varying hardness present different cutting resistances, resulting in varying cutting efficiencies. Research has shown that using a wider cutting tool results in a wider contact area with the strata, leading to greater cutting resistance. When cutting soft strata, such as clay, large chunks of clay can be cut off efficiently. However, when cutting hard rock layers, the larger contact area results in less pressure, leading to poorer cutting and slower overall efficiency. Conversely, using a narrower cutting tool results in a narrower contact area with the strata, reducing cutting resistance. When cutting soft strata, fewer clay layers are cut off at a time, resulting in slower cutting. However, when cutting rock, the narrower tool generates greater pressure, increasing the cutting speed.

[0031] Through the above structural improvements, when cutting the strata, the first cutter 32 first contacts the strata. If the strata are relatively hard rock layers, because the contact area between the first cutter 32 and the rock layer is large, the first cutter 32 experiences greater friction from the rock layer. This causes the first cutter 32 and the second cutter 33 to rotate simultaneously, bringing the second cutter 33 into contact with the rock layer. As the chain 2 moves, the second cutter 33 cuts the rock layer. During the cutting process, because the second cutter 33 is narrower than the first cutter 32, it applies more friction. The greater the pressure applied to the rock layer, the easier it is to cut. Simultaneously, under these conditions, the torsion shaft 34 is twisted, accumulating elastic potential energy. When transitioning from cutting rock layers to cutting softer layers such as clay, the frictional force on the first cutter 32 and the second cutter 33 is less than the torsional force of the torsion shaft 34. Therefore, the torsion shaft 34 drives the first cutter 32 and the second cutter 33 to rotate back, restoring the first cutter 32 to contact the clay layer being cut. The wider first cutter then cuts the clay layer quickly. Through these structural improvements, both hard rock layers and soft clay layers can be cut simultaneously, and the cutting speed can be increased, making the device adaptable to cutting strata in complex geological conditions. Furthermore, the torsion shaft 34 ensures that when the first cutter 32 or the second cutter 33 is impacted, it can promptly undergo torsional deformation, preventing damage to the first cutter 32 or the second cutter 33.

[0032] Furthermore, the cutter head assembly 3 also includes a support base 35, which is fixedly connected to the cutter holder 31. The support base 35 is provided with a mounting hole 211, and the extension end of the torsion shaft 34 is rotatably connected to the support base 35 through the mounting hole 211.

[0033] It is understood that one end of the torsion shaft 34 is fixedly connected to the blade holder 31. When the first cutter 32 or the second cutter 33 is subjected to frictional resistance, part of the force is converted into a torsional force that causes the torsion shaft 34 to undergo torsional deformation, while another part of the frictional force causes the torsion shaft 34 to generate a bending moment, thus causing the torsion shaft 34 to bend. When the torsion shaft 34 bends, the first cutter 32 and the second cutter 33 cannot cut in the correct direction, causing the first cutter 32 and the second cutter 33 to shift in position. This results in the cutting edges of the first cutter 32 and the second cutter 33 not being aligned with the layer being cut, thus preventing a good cutting effect during the cutting process. However, the support base 35 provides support for the torsion shaft 34, which counteracts the bending moment of the torsion shaft 34, preventing the torsion shaft 34 from bending. This, in turn, prevents the first cutter 32 and the second cutter 33 from shifting in position, ensuring that the cutting edges of the first cutter 32 and the second cutter 33 always face the layer being cut, thus ensuring the cutting effect. At the same time, it prevents the first cutter 32 and the second cutter 33 from experiencing excessive frictional resistance, which could cause the torsion shaft 34 to break.

[0034] Furthermore, the cutter head assembly 3 also includes a set screw 36. The support base 35 is provided with an elongated countersunk hole 351, which extends along the axial direction of the torsion shaft 34. The cutter holder 31 is provided with a threaded hole 311. The set screw 36 passes through the elongated countersunk hole 351 and is threadedly connected to the threaded hole 311. The support base 35 is fastened to the cutter holder 31 by the set screw 36. Two elongated countersunk holes 351 are arranged, and two set screws 36 and two threaded holes 311 are also arranged accordingly. The support base 35 is fixed by the two set screws 36 to prevent the support base 35 from rotating. The cutter holder 31 is provided with a insertion hole 312, and the torsion shaft 34 is inserted and fixedly connected in the insertion hole 312. The torsion shaft 34 is provided with a positioning boss 341, which abuts and limits the cutter holder 31 along the axial direction of the torsion shaft 34. Specifically, the insertion hole 312 is a rectangular hole, and the end of the torsion shaft 34 is provided with a rectangular cross-section. The torsion shaft 34 is circumferentially limited by the insertion hole to prevent relative rotation between the torsion shaft 34 and the tool holder 31. In some other embodiments of this application, the insertion hole 312 can also be a regular polygonal hole, a semi-circular hole, or other irregularly shaped hole, with the end of the torsion shaft 34 corresponding to the insertion hole 312 for insertion and connection.

[0035] As can be seen from the above structural design, when it is necessary to replace the first cutter 32 and the second cutter 33, it is only necessary to remove the support and pull the torsion shaft 34 out of the insertion hole 312 to remove the first cutter 32, the second cutter 33, and the torsion shaft 34. During installation, simply insert the new torsion shaft 34 into the insertion hole 312 for installation, facilitating installation and disassembly. During insertion installation, positioning is achieved through the positioning boss 341.

[0036] Furthermore, the first cutter 32 is arranged at an acute angle to the length direction of the chain 2.

[0037] It is known that by setting the angle to an acute angle, that is, increasing the sharpness of the first cutter 32 and reducing the working area of ​​the head of the first cutter 32, the pressure between the first cutter 32 and the stratum being cut is increased, making it easier for the first cutter 32 to cut into the stratum, thereby improving the cutting efficiency.

[0038] Furthermore, the first cutter 32 is provided with a first wear-resistant cutter head 321, which is arranged in a flat shape; the second cutter 33 is provided with a second wear-resistant cutter head 331, which is arranged in a conical shape.

[0039] It is known that the flat first wear-resistant cutter head 321 can cut a larger area of ​​strata at the same time, which is beneficial for cutting soft strata. The setting of the first wear-resistant head facilitates the cutting of soft strata. The conical second wear-resistant head can generate large pressure, which is beneficial for cutting hard rock strata. The setting of the second wear-resistant head facilitates the cutting of hard rock strata.

[0040] Furthermore, a wear-resistant layer 322 is provided on the outer side of both the first cutter 32 and the outer side of the second cutter 33.

[0041] It is understood that by setting the wear-resistant layer 322, the wear resistance of the first cutter 32 and the second cutter 33 can be improved, the service life of the first cutter 32 and the second cutter 33 can be increased, and the replacement frequency of the first cutter 32 and the second cutter 33 can be reduced.

[0042] Furthermore, multiple sets of cutter head assemblies 3 are arranged, and these multiple sets of cutter head assemblies 3 are arranged alternately on the cutter holder 31.

[0043] It is understood that by arranging multiple sets of cutter head assemblies 3 on the cutter holder 31, multiple first cutters 32 and second cutters 33 for cutting are provided on the same cutter holder 31, and the multiple cutter head assemblies 3 are arranged in a staggered manner, so that multiple first cutters 32 and second cutters 33 can cut at different positions at the same time, thereby improving the overall cutting efficiency.

[0044] Furthermore, the chain 2 includes multiple chain links 21 and multiple chain pins 22. The chain links 21 are connected end to end in sequence through the chain pins 22. Each chain link 21 is provided with a mounting hole 211. Multiple mounting holes 211 are provided, and the mounting holes 211 are located on the side of the chain link 21 away from the cutting box 1. The tool holder 31 is detachably mounted on the chain link 21 through the mounting holes 211.

[0045] It is understood that by setting the chain link 21 and the chain pin 22, the chain 2 can move smoothly around the cutting box 1 for cutting. Furthermore, by setting the mounting hole 211 on the chain link 21, the blade holder 31 and the first cutter 32 and the second cutter 33 for cutting can be easily and detachably installed on the chain link 21. Thus, the above structural design allows for easy replacement of the worn first cutter 32 and the second cutter 33.

[0046] Furthermore, a tool holder 31 is installed on chain 2 every N links 21, where N is greater than or equal to 1.

[0047] Specifically, when N equals 1, one cutter head 31 is installed on chain 2 every other link 21; when N equals 3, one cutter head 31 is installed on chain 2 every three links 21. It is known that the more cutter heads 31 installed, the stronger the cutting ability, but also the greater the cutting resistance. Therefore, the value of N needs to be selected according to the actual situation. In practical applications, N is generally greater than or equal to 4 and less than or equal to 8. Within this range, the overall cutting efficiency is high and the energy consumption is low. It should be noted that the cutter head assemblies 3 on adjacent cutter heads 31 are staggered. This arrangement ensures that when chain 2 moves and cuts the cutter head assemblies 3, each set of cutter head assemblies 3 cuts at different positions, allowing the cutter head assemblies 3 to fully cut the rock layer and preventing uncut positions from contacting chain 2 and hindering cutting.

[0048] Furthermore, the fastener 4 is a bolt, and the tool holder 31 is fixedly connected to the chain 2 by the bolt.

[0049] Specifically, the tool holder 31 is provided with a through hole, and bolts pass through the through hole on the tool holder 31 and the mounting hole 211 on the chain link 21 to achieve a detachable and fixed connection between the tool holder 31 and the chain link 21. Four bolts are arranged to securely connect the tool holder 31 to the corresponding chain link 21. When it is necessary to disassemble the tool holder 31, simply loosen the bolts and remove them to remove or replace the tool holder 31.

[0050] Furthermore, the cutter head assembly 3 also includes a third cutter 5. Two third cutters 5 are provided, and the two third cutters 5 are fixedly connected to both ends of the cutter holder 31 respectively. The third cutters 5 cut the two ends of the cutter holder 31 so that the cutter head assembly 3 can cut to both ends of the cutter holder 31, preventing the uncut rock layers from hitting the cutter holder 31 during the cutting process and causing the cutting to stop.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cutter head structure for a TRD (Tracking Method) machine adapted to complex geological conditions, comprising a cutting housing (1), a chain (2), a cutter head assembly (3), and fasteners (4), wherein the chain (2) is mounted on the outside of the cutting housing (1), and the cutter head assembly (3) is fixedly connected to the chain (2) by the fasteners (4), characterized in that: The cutter head assembly (3) includes a cutter holder (31), a first cutter (32), a second cutter (33), and a torsion shaft (34); The first end of the torsion shaft (34) is fixedly connected to the blade holder (31), and the second end of the torsion shaft (34) extends in a direction perpendicular to the chain (2). The first cutter (32) and the second cutter (33) are both fixedly connected to the extended end of the torsion shaft (34). The blade of the first cutter (32) is arranged in the direction of movement of the chain (2), and the second cutter (33) is arranged on one side of the blade of the first cutter (32). The width of the first cutter (32) is wider than the width of the second cutter (33).

2. The TRD (Technical Deposition and Removal) cutterhead structure adapted to complex geological conditions according to claim 1, characterized in that: The cutter head assembly (3) also includes a support base (35), which is fixedly connected to the cutter holder (31), and the extension end of the torsion shaft (34) is rotatably connected to the support base (35).

3. The TRD (Technical Deposition and Removal) cutterhead structure adapted to complex geological conditions according to claim 2, characterized in that: The cutter head assembly (3) also includes a set screw (36), the support base (35) is provided with an elongated countersunk hole (351), the cutter holder (31) is provided with a threaded hole (311), and the set screw (36) passes through the elongated countersunk hole (351) and is threadedly connected to the threaded hole (311). The tool holder (31) is provided with a insertion hole (312), and the torsion shaft (34) is inserted and fixedly connected in the insertion hole (312). The torsion shaft (34) is provided with a positioning boss (341), and the positioning boss (341) and the tool holder (31) abut and limit each other along the axial direction of the torsion shaft (34).

4. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 1, characterized in that: The first cutter (32) is arranged at an acute angle to the length direction of the chain (2).

5. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 4, characterized in that: The first cutter (32) is provided with a first wear-resistant cutter head (321), which is arranged in a flat shape; The second cutter (33) is provided with a second wear-resistant cutter head (331), which is arranged in a conical shape.

6. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 5, characterized in that: The outer sides of the first cutter (32) and the outer sides of the second cutter (33) are both covered with a wear-resistant layer (322).

7. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 3, characterized in that: Multiple sets of the cutter head assembly (3) are arranged, and the multiple sets of the cutter head assembly (3) are arranged alternately on the cutter holder (31).

8. The TRD (Tunneling Drilling) cutterhead structure adapted to complex geological conditions according to claim 7, characterized in that: The chain (2) includes multiple links (21) and multiple pins (22). The links (21) are connected end to end in sequence through the pins (22). Each link (21) is provided with a mounting hole (211). The tool holder (31) is fixedly installed on the link (21) through the mounting hole (211).

9. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 8, characterized in that: A tool holder (31) is installed on the chain (2) every N links (21), where N is greater than or equal to 1.

10. The TRD (Transformer Detector) cutterhead structure adapted to complex geological conditions according to claim 1, characterized in that: The fastener (4) is a bolt, and the tool holder (31) is fixedly connected to the chain (2) by the bolt.

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