Multi-head drill trenching machine for low-clearance underground diaphragm wall

Abstract

The utility model discloses a multi-head drill trenching machine for a low-clearance underground diaphragm wall, and relates to the technical field of engineering machinery. The low-clearance underground diaphragm wall multi-head drill trenching machine comprises a machine body, two supporting devices, a slurry discharging device and a drilling device, the machine body comprises a bottom frame and a walking mechanism, and a first through hole is formed in the bottom frame; the two supporting devices are installed on the bottom frame. The slurry discharging device is connected to the two supporting devices respectively; the drilling device is connected to the slurry discharging device and can penetrate through the first through hole, the drilling device allows slurry to enter the drilling device, and the slurry discharging device is used for discharging the slurry entering the drilling device. According to the utility model, the grabbing groove does not need to be lifted and lowered to discharge slurry during grooving operation, so that not only can the continuity of grooving operation be realized to improve the grooving efficiency, but also the space requirement on a construction site is reduced, construction in small space environments such as tunnels and the like can be realized, and the construction cost is reduced. And the adaptability of the trenching machine to the construction environment with limited space is improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a multi-head drilling and trenching machine for low-headroom underground continuous walls. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Diaphragm walls are a construction technology widely used in deep foundation pit support, underground structure seepage prevention, water conservancy projects, and subway tunnels. They involve continuously excavating trenches in the ground and pouring concrete to form a continuous reinforced concrete wall, offering advantages such as high rigidity, good seepage prevention, and adaptability to complex geological conditions. The trenching machine is the core equipment in diaphragm wall construction, primarily used for efficiently and accurately excavating rectangular or T-shaped trenches in soil or rock strata.

[0004] The trenching machine in the relevant technology uses a grab bucket to grab soil to perform trenching operations. This type of operation requires a large working space to lift and lower the grab bucket and transfer and remove slag. It is difficult or even impossible to carry out normal construction in low-clearance environments such as tunnels. Moreover, after grabbing the soil, the grab bucket of the trenching machine needs to be raised to remove slag, which cannot achieve continuous grabbing operations and results in low trenching efficiency.

[0005] Therefore, how to improve the adaptability of trenching machines to construction environments with limited space and how to improve the construction efficiency of trenching machines are technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to at least solve the problems of existing trenching machines being difficult to operate in space-constrained environments and having low trenching efficiency. This purpose is achieved through the following technical solution:

[0007] This utility model proposes a multi-head drilling and trenching machine for low-headroom diaphragm walls, comprising a machine body, two support devices, a slurry discharge device, and a drilling device. The machine body includes a base frame and a traveling mechanism installed at the bottom of the base frame, the base frame having a first through hole. The two support devices are installed on the base frame and are respectively located on both sides of the first through hole. The slurry discharge device is respectively connected to the two support devices and can move up and down along the two support devices to approach or move away from the base frame. The drilling device is connected to the slurry discharge device and can pass through the first through hole. The drilling device is configured to allow mud to enter its own interior. The drilling device is connected to the slurry discharge device, which is used to remove the mud that enters the interior of the drilling device.

[0008] The low-headroom underground continuous wall multi-head drilling trenching machine provided by this utility model includes a machine body, two support devices, a slurry discharge device, and a drilling device. While the drilling device is used for trenching operations, the slurry discharge device can be used to directly discharge the mud during the drilling process. Compared with the existing grab-and-drop trenching machine, there is no need to lift and lower the grab-and-drop device to discharge mud and slag during trenching operations. Therefore, it can not only achieve continuous trenching operations to improve trenching efficiency, but also reduce the space requirements of the construction site. It can be used for construction in small space environments such as tunnels, improving the adaptability of the trenching machine to space-constrained construction environments.

[0009] In addition, the low-headroom underground continuous wall multi-head drilling trenching machine according to this utility model may also have the following additional technical features:

[0010] In some embodiments of this utility model, the support device includes a support frame, a telescopic mechanism, and a lifting mechanism. The bottom of the support frame is hinged to the base frame, the lower end of the telescopic mechanism is hinged to the base frame, and the upper end of the telescopic mechanism is hinged to the upper end of the support frame. The telescopic mechanism is configured to drive the support frame to rotate on the base frame. The lifting mechanism is installed on the support frame, and the drilling device is connected to the lifting mechanism.

[0011] In some embodiments of this utility model, the slurry discharge device includes a mounting frame, a slurry pump, a slurry discharge pipeline, and a slurry discharge pipeline. The opposite ends of the mounting frame are installed on the two supporting devices. The slurry pump is installed on the mounting frame and has a slurry discharge port. One end of the slurry discharge pipeline is connected to and communicates with the slurry pump, and the other end of the slurry discharge pipeline is connected to and communicates with the drilling device. The slurry discharge pipeline is connected to and communicates with the slurry discharge port. The slurry pump is used to draw mud from the slurry discharge pipeline and discharge the mud from the slurry discharge pipeline.

[0012] In some embodiments of this utility model, there are two slurry pumps, two slurry outlet pipes, and two slurry discharge pipes. One of the two slurry outlet pipes is a curved pipe, and the other of the two slurry outlet pipes is a straight pipe. The upper end of the curved pipe is connected to and communicates with one of the slurry pumps, and the lower end of the curved pipe is connected to and communicates with the drilling device. The upper end of the straight pipe is connected to and communicates with the other slurry pump, and the lower end of the straight pipe is connected to and communicates with the drilling device. The two slurry discharge pipes are respectively connected to and communicate with the slurry discharge ports of the two slurry pumps.

[0013] In some embodiments of this utility model, the low-headroom diaphragm wall multi-head drilling trenching machine further includes a drill rod, the upper end of which is connected and communicates with the slurry discharge device, and the lower end of which is connected and communicates with the drilling device; when the slurry discharge device includes a mounting frame, two slurry pumps, two slurry discharge pipes, and two slurry discharge pipes, the drill rod includes a first drill rod and a second drill rod, the upper end of which is connected and communicates with the lower end of one of the slurry discharge pipes, and the lower end of which is connected and communicates with the drilling device; the upper end of which is connected and communicates with the lower end of the other slurry discharge pipe, and the lower end of which is connected and communicates with the drilling device.

[0014] In some embodiments of this utility model, the low-headroom underground continuous wall multi-head drilling trenching machine further includes a fastening device. The fastening device includes a first annular portion and a second annular portion integrally connected. The first annular portion is provided with a first limiting hole, and the second annular portion is provided with a second limiting hole. The first drill rod passes through the first limiting hole and fits against the hole wall of the first limiting hole, and the second drill rod passes through the second limiting hole and fits against the hole wall of the second limiting hole.

[0015] In some embodiments of this utility model, the drilling device includes a first housing, two connecting pipes, a second housing, two conductive pipes, a drive assembly, and multiple drill bits. The first housing is located above the second housing and has a second through hole and a third through hole. The first drill rod passes through the second through hole, and the second drill rod passes through the third through hole. One end of the first housing is connected to one side of the second housing through one of the connecting pipes, and the other end of the first housing is connected to the other side of the second housing through the other connecting pipe. The multiple drill bits are mounted on the first housing in a manner rotatable about their own axial direction. The bottom of the two housings is located below the second housing. The drive assembly is installed inside the second housing and connected to the plurality of drill bits. The drive assembly is used to drive the plurality of drill bits to rotate. At least a portion of the plurality of drill bits is provided with a first mud inlet. The second housing is provided with a mud flow channel connected to the first mud inlet. The two connecting pipes are installed on the top of the second housing. The lower ends of the two connecting pipes are respectively connected to the mud flow channel. The upper end of one of the two connecting pipes is connected to and communicates with the lower end of the first drill rod. The upper end of the other of the two connecting pipes is connected to and communicates with the second drill rod.

[0016] In some embodiments of this utility model, the driving assembly includes a driving mechanism, two transmission gear sets, and an intermediate gear. Each transmission gear set includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, and a sixth gear. The first gear is connected to the driving mechanism and rotates under its drive. The second gear meshes with the first gear and is located on the side of the first gear away from the other transmission gear set. The fourth gear meshes with the second gear, and the sixth gear meshes with the fourth gear. The diameter of the sixth gear is larger than both the second and fourth gears. The diameter of the fourth gear is smaller than the diameter of the second gear but larger than the diameter of the first gear. Two third gears mesh with the second gears, forming a [missing information - likely a specific configuration]. The first gear is spaced apart, and the fifth gear meshes with one of the third gears. The diameters of the third gear and the fifth gear are both larger than the diameter of the first gear, and the diameter of the fifth gear is smaller than the diameter of the third gear. The intermediate gear is located between the two transmission gear sets and meshes with two of the fifth gears in each of the two transmission gear sets. The diameter of the intermediate gear is larger than the diameter of the third gear. The plurality of drill bits includes a first drill bit, a second drill bit, and a third drill bit. The two first drill bits are coaxially connected to the two sixth gears of the two transmission gear sets and rotate synchronously. The four second drill bits are coaxially connected to the four third gears of the two transmission gear sets and rotate synchronously. The third drill bit is coaxially connected to the intermediate gear and rotates synchronously.

[0017] In some embodiments of this utility model, two first drill bits are located at opposite ends on the lower side of the first housing along a first direction, the first direction being perpendicular to the arrangement direction from the first housing to the second housing. Four second drill bits are located between the two first drill bits and surround the first drill bits. The first drill bit includes a drill pipe and a drill cylinder. The upper end of the drill pipe is coaxially connected to the first gear and communicates with the mud flow channel. The lower end of the drill pipe is provided with a first mud inlet. The drill cylinder is installed at the lower end of the drill pipe. The side wall of the drill cylinder is provided with a plurality of second mud inlets. The inner wall and / or outer wall of the drill cylinder are provided with a plurality of second mud inlets. A third drill bit includes a first rotating rod and a second rotating blade spirally disposed on the first rotating rod along its length. The bottom of the first rotating blade is provided with multiple second drilling cones. Along the arrangement direction from the first housing to the second housing, the distance between the bottom of the first rotating blade and the second housing is greater than the distance between the bottom of the first drill bit and the second housing. The distance between the bottom of the first drill bit and the second housing is greater than or equal to the distance between the bottom of the third drill bit and the second housing. The third drill bit includes a second rotating rod and a second rotating blade spirally disposed on the second rotating rod along its length.

[0018] In some embodiments of this utility model, the second box body includes a bottom wall and side walls connected around the bottom wall. The side wall is provided with a plurality of first serrations on the side opposite to the first box body. The first serrations are located below the bottom wall and are spaced apart along the circumferential direction of the side wall. And / or, the bottom wall is provided with a plurality of spaced second serrations around its perimeter. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0020] In the attached diagram:

[0021] Figure 1 This diagram shows a structural schematic of the low-headroom underground continuous wall multi-head drilling trenching machine provided in one state according to an embodiment of the present invention;

[0022] Figure 2 This diagram shows a structural schematic of the low-headroom underground continuous wall multi-head drilling trenching machine provided in another state according to an embodiment of the present invention;

[0023] Figure 3 This diagram shows the structural schematic of the body of the low-headroom underground continuous wall multi-head drilling trenching machine provided in an embodiment of the present invention;

[0024] Figure 4 A side view of the support device for a multi-head drilling and trenching machine for low-headroom underground continuous wall provided in an embodiment of the present invention is shown.

[0025] Figure 5 This is a front view of the support device for a multi-head drilling and trenching machine for low-headroom underground continuous wall provided in an embodiment of the present invention;

[0026] Figure 6 This illustration shows a structural diagram of the body, support device, and slurry discharge device of the low-headroom underground continuous wall multi-head drilling trenching machine provided in an embodiment of the present invention.

[0027] Figure 7 This diagram shows a structural schematic of the fastening device for a multi-head drilling and trenching machine for low-headroom underground continuous wall provided in an embodiment of the present invention.

[0028] Figure 8 This diagram shows the state of the low-headroom underground continuous wall multi-head drilling trenching machine provided in this embodiment of the present invention during trenching operations;

[0029] Figure 9 This diagram shows the structure of the drilling device of the multi-head drilling trenching machine for low-headroom underground continuous wall provided in an embodiment of the present invention;

[0030] Figure 10 This diagram shows a partial structural schematic of the drilling device of the multi-head drilling trenching machine for low-headroom underground continuous wall provided in an embodiment of the present invention.

[0031] Figure 11 A schematic diagram of the drive assembly of the low-headroom underground continuous wall multi-head drilling trenching machine provided in an embodiment of the present invention is shown.

[0032] The attached figures are labeled as follows:

[0033] 100. Low-headroom diaphragm wall multi-head drilling and trenching machine;

[0034] 10. Body; 11. Base frame; 111. First through hole; 112. Hinge seat; 12. Walking mechanism; 13. Lifting outriggers;

[0035] 20. Support device; 21. Support frame; 22. Telescopic mechanism; 23. Lifting mechanism;

[0036] 30. Slurry discharge device; 31. Mounting frame; 32. Slurry pump; 321. Slurry discharge port; 33. Slurry discharge pipeline; 331. Bent pipe; 332. Straight pipe;

[0037] 40. Drilling device; 41. First housing; 411. Second through hole; 412. Third through hole; 42. Connecting pipe; 43. Second housing; 431. First sawtooth; 44. Conducting pipeline; 45. Drive assembly; 451. Transmission gear set; 4511. First gear; 4512. Second gear; 4513. Third gear; 4514. Fourth gear; 4515. Fifth gear; 4516. Sixth gear; 452. Intermediate gear; 46. First drill bit; 461. Drill pipe; 4611. First slurry inlet; 462. Drill barrel; 463. First drilling cone; 47. Second drill bit; 471. First rotating rod; 472. First vane; 473. Second drilling cone; 48. Third drill bit; 481. Second rotating rod; 482. Second vane; 483. Third drilling cone;

[0038] 50. First drill pipe; 60. Second drill pipe;

[0039] 70. Fastening device; 71. First annular portion; 711. First limiting hole; 72. Second annular portion; 721. Second limiting hole;

[0040] X, the first direction. Detailed Implementation

[0041] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0042] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0043] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0045] Combined with appendix Figure 1 and 2 As shown in the figure, this application provides a low-headroom underground continuous wall multi-head drilling trenching machine 100, including a machine body 10, two support devices 20, a slurry discharge device 30, and a drilling device 40. The machine body 10 is the installation foundation for functional devices such as the support devices 20, the slurry discharge device 30, and the drilling device 40. The support devices 20 are structures used to support and fix the slurry discharge device 30 and drive the slurry discharge device 30 to move. The slurry discharge device 30 is used to discharge the mud generated by the trenching machine during the drilling process. The drilling is used for trenching.

[0046] The body 10 of this embodiment includes a base frame 11 and a walking mechanism 12 mounted on the bottom of the base frame 11. The base frame 11 can be approximately plate-shaped, and its material can be a metal material with a certain structural strength. The walking mechanism 12 can be in the form of tracks as shown in the figure, or it can be in the form of wheels, as long as it can enable the body 10 to move. This embodiment will not list them in detail.

[0047] Combined with appendix Figure 4As shown, in order to facilitate drilling operations of the drilling device 40, this embodiment provides a first through hole 111 on the base frame 11. The size of the first through hole 111 is larger than the size of the drilling device 40. At the same time, the presence of the first through hole 111 can also reduce the weight of the machine body 10.

[0048] In this embodiment, there are two support devices 20. The two support devices 20 are located on both sides of the first through hole 111. The support devices 20 are installed on the base frame 11. The installation method can be the following hinge connection. Specifically, two hinge seats 112 are arranged on the base frame 11. The two support devices 20 are hinged to the two hinge seats 112 one by one through rotating components such as rotating shafts, so that the support devices 20 can rotate.

[0049] In this embodiment, the slurry discharge device 30 is connected to two support devices 20 on both sides, and can be raised and lowered along the two support devices 20 to approach or move away from the base frame 11, thereby facilitating the adjustment of the position of the slurry discharge device 30 on the support devices 20.

[0050] In this embodiment, the drilling device 40 is installed on the grout discharge device 30 and can penetrate through the first through hole 111 to extend into the guide trench for drilling, thereby realizing the trenching step of the underground continuous wall operation.

[0051] Furthermore, the drilling device 40 of this embodiment is configured to allow mud to enter its interior, and the drilling device 40 is connected to the mud discharge device 30, which is used to remove the mud that has entered the interior of the drilling device 40. The specific structural forms of the drilling device 40 and the mud discharge device 30 are given below.

[0052] Unlike the grab-type trenching machine in related technologies, this embodiment designs the low-headroom underground continuous wall multi-head drilling trenching machine 100 as including a body 10, two support devices 20, a slurry discharge device 30, and a drilling device 40. While the drilling device 40 performs trenching operations, the slurry discharge device 30 can directly discharge the drilling slurry. Compared with the grab-type trenching machine, there is no need to lift and lower the grab-type machine to discharge slurry and excavated soil during trenching operations. Therefore, it not only achieves continuous trenching operations to improve trenching efficiency but also reduces the space requirements of the construction site, enabling trenching to be carried out in a more efficient manner. Figure 8 The ability to construct in confined spaces such as tunnels improves the adaptability of trenching machines to such environments.

[0053] In some embodiments, multiple lifting outriggers 13 may be installed around the base frame 11. The lifting outriggers 13 can provide auxiliary support for the base frame 11, increase the contact area between the trenching machine and the ground, and improve the stability of the trenching machine during operation.

[0054] Combined with appendix Figure 4 and attached Figure 5 As shown, in some examples, optionally, the support device 20 of this embodiment includes a support frame 21, a telescopic mechanism 22 and a lifting mechanism 23. The support frame 21 is the main structure of the support device 20 and is used to install the telescopic mechanism 22 and the support device 20.

[0055] The bottom of the support frame 21 is hinged to the hinge seat 112 on the base frame 11, so that the support frame 21 can drive the lifting mechanism 23, the slurry discharge device 30 and the drilling device 40 to rotate, thereby reducing the overall height of the equipment and making it convenient to flexibly adjust the position of the slurry discharge device 30 and the drilling device 40.

[0056] In this embodiment, the lifting mechanism 23 is fixedly installed on the support frame 21, and the drilling device 40 is fixedly or detachably installed on the lifting mechanism 23. The lifting mechanism 23 can be the sprocket and chain lifting structure shown in the figure, or it can be a cylinder, hydraulic cylinder or other lifting structure in related technologies. Any mechanism that can drive the drilling device 40 to lift can be used as the lifting mechanism 23 in this embodiment. This embodiment will not list them one by one.

[0057] The lower end of the telescopic mechanism 22 is hinged to the base frame 11, and the upper end of the telescopic mechanism 22 is hinged to the upper end of the support frame 21. This allows the lower end of the telescopic mechanism 22 to rotate on the base frame 11 and the upper end to rotate on the support frame 21 when the telescopic mechanism 22 is telescopic. The telescopic mechanism 22's telescopic movement can also drive the support frame 21 to rotate on the base frame 11.

[0058] Combined with appendix Figure 6 As shown, in some examples, optionally, the slurry discharge device 30 includes a mounting frame 31, a slurry pump 32, a slurry discharge pipeline 33, and a slurry discharge pipeline (not shown in the figure). The mounting frame 31 serves as the mounting base for the slurry pump 32. (This is in conjunction with the attached...) Figure 5 As shown, the mounting bracket 31 is fixedly connected to the two support devices 20 at opposite ends along the horizontal direction, so that the two support devices 20 and the mounting bracket 31 between them form a gate-shaped support structure.

[0059] The discharge pump 32 is mounted on the mounting frame 31. The discharge pump 32 is provided with a discharge port 321. The discharge pump 32 can be a mud pump in the related art that can suck up mud and discharge mud. Its structure will not be described in detail in this embodiment.

[0060] One end of the slurry outlet pipe 33 is connected to and communicates with the slurry outlet pump 32, and the other end of the slurry outlet pipe 33 is connected to and communicates with the drilling device 40. The slurry discharge pipe is connected to and communicates with the slurry discharge port 321. The slurry outlet pump 32 is used to suck up the mud in the slurry outlet pipe 33 and discharge the mud through the slurry discharge pipe.

[0061] To improve the efficiency of mud discharge, this embodiment designs two mud pumps 32, two mud discharge pipes 33, and two mud discharge pipes. Since the overall size of the two mud pumps 32 arranged horizontally is larger than the overall size of the two drill rods arranged horizontally, in order to facilitate the connection of the first drill rod 50 and the second drill rod 60 described below, this embodiment designs one of the two mud discharge pipes 33 as a curved pipe 331 and the other of the two mud discharge pipes 33 as a straight pipe 332.

[0062] The upper end of the curved pipe 331 is connected to one of the slurry pumps 32, and the lower end of the curved pipe 331 is indirectly connected to the drilling device 40 through the first drill rod 50. The upper end of the straight pipe 332 is connected to the other slurry pump 32, and the lower end of the straight pipe 332 is indirectly connected to the drilling device 40 through the second drill rod 60. The two slurry discharge pipes are respectively connected to the slurry discharge ports 321 of the two slurry pumps 32.

[0063] During the slurry discharge operation, the mud in the drilling device 40 enters the curved pipe 331 and the straight pipe 332 through the first drill rod 50 and the second drill rod 60, respectively. Then the slurry pump discharges the mud through the slurry discharge port 321 to the slurry discharge pipeline, and the slurry discharge pipeline discharges the mud to the mud pool outside the trenching operation surface.

[0064] To meet the drilling depth requirements, the low headroom diaphragm wall multi-head trenching machine 100 also includes a drill rod. The upper end of the drill rod is connected to and communicates with the slurry discharge device 30, and the lower end of the drill rod is connected to and communicates with the drilling device 40.

[0065] Specifically, the drill rod includes a first drill rod 50 and a second drill rod 60. The upper end of the first drill rod 50 is connected and communicates with the lower end of one of the slurry outlet pipes 33 (curved pipe 331), and the lower end of the first drill rod 50 is connected and communicates with the drilling device 40. The upper end of the second drill rod 60 is connected and communicates with the lower end of another slurry outlet pipe 33 (straight pipe 332), and the lower end of the second drill rod 60 is connected and communicates with the drilling device 40.

[0066] In some embodiments, there may be multiple first drill rods 50 and multiple second drill rods 60, with multiple first drill rods 50 connected end-to-end to form an integral drill rod, and multiple second drill rods 60 connected end-to-end to form another integral drill rod.

[0067] Combined with appendix Figure 7As shown, in some examples, the low-headroom diaphragm wall multi-head drilling trenching machine 100 may optionally include a fastening device 70. The reason for configuring the fastening device 70 is that the drill rod in the related art usually only has a first drill rod 50, instead of having a first drill rod 50 and a second drill rod 60 side by side as in this application. In order to achieve the stability of the first drill rod 50 and the second drill rod 60 during the drilling process, this embodiment uses the fastening device 70 to connect the first drill rod 50 and the second drill rod 60, thereby improving the stability of their position and structure.

[0068] The fastening device 70 of this embodiment includes a first annular portion 71 and a second annular portion 72 integrally connected. In some embodiments, the first annular portion 71 and the second annular portion 72 may be integrally molded parts.

[0069] The first annular portion 71 is provided with a first limiting hole 711, and the second annular portion 72 is provided with a second limiting hole 721. The shape and size of the first limiting hole 711 match the shape and size of the outer wall of the first drill rod 50, and the shape and size of the second limiting hole 721 match the shape and size of the outer wall of the second drill rod 60. The first drill rod 50 passes through the first limiting hole 711 and fits against the hole wall of the first limiting hole 711, and the second drill rod 60 passes through the second limiting hole 721 and fits against the hole wall of the second limiting hole 721, thereby achieving the fixation between the first drill rod 50 and the second drill rod 60.

[0070] To facilitate the installation of the fastening device 70, in some embodiments, the first annular portion 71 of this embodiment may have a plurality of first connecting holes (not shown in the figure) around the first limiting hole 711, the second annular portion 72 may have a plurality of second connecting holes (not shown in the figure) around the second limiting hole 721, the outer wall of the first drill rod 50 may have a first annular flange (not shown in the figure), the first annular flange may have a plurality of third connecting holes (not shown in the figure) circumferentially, the outer wall of the second drill rod 60 may have a second annular flange (not shown in the figure), the second annular flange may have a plurality of fourth connecting holes (not shown in the figure) circumferentially, the plurality of first connecting holes are connected to the plurality of third connecting holes one by one through a first connecting member, and the plurality of second connecting holes are connected to the plurality of fourth connecting holes one by one through a second connecting member. The aforementioned first connecting member and second connecting member may be connecting components such as bolts.

[0071] Combined with appendix Figure 9 and attached Figure 10 As shown ( Figure 9The figure shows a cross-sectional view of the drilling device 40 (the second drill bit 47 is not shown). In some examples, the drilling device 40 may optionally include a first housing 41, two connecting pipes 42, a second housing 43, two conductive pipes 44, a drive assembly 45, and multiple drill bits. The first housing 41 is located above the second housing 43. The first housing 41 is used to connect to the first drill rod 50 and the second drill rod 60 described above in this embodiment. That is, the first housing 41 can be indirectly connected to the slurry discharge device 30 through the first drill rod 50 and the second drill rod 60.

[0072] Specifically, in this embodiment, the first housing 41 is provided with a second through hole 411 and a third through hole 412. The first drill rod 50 passes through the second through hole 411 and is connected and fixed to the first housing 41. The second drill rod 60 passes through the third through hole 412 and is connected and fixed to the first housing 41.

[0073] In this embodiment, one end of the first housing 41 is connected to one side of the second housing 43 through one of the connecting pipes 42, and the other end of the first housing 41 is connected to the other side of the second housing 43 through another connecting pipe 42. The connecting pipe 42 can be connected to the first housing 41 and the second housing 43 through a structure such as a flange. Furthermore, since the connecting pipe 42 is hollow inside, the overall weight of the drilling device 40 can also be reduced.

[0074] In this embodiment, multiple drill bits are mounted at the bottom of the second housing 43 and located below the second housing 43 in a manner that allows them to rotate around their own axis. The drive assembly 45 is installed inside the second housing 43 and connected to the multiple drill bits. The drive assembly 45 is used to drive the multiple drill bits to rotate. Some of the multiple drill bits are provided with a first slurry inlet 4611. The specific structure of the drill bits and the drive assembly 45 is given below.

[0075] In this embodiment, the second housing 43 is provided with a mud flow channel (not shown in the figure) connected to the first mud inlet 4611. Two connecting pipes 44 are installed on the top of the second housing 43. The lower ends of the two connecting pipes 44 are respectively connected to the mud flow channel. The upper end of one of the two connecting pipes 44 is connected to and communicates with the lower end of the first drill rod 50, and the upper end of the other connecting pipe 44 is connected to and communicates with the second drill rod 60.

[0076] When the drill bit is drilling, the mud enters the mud flow channel through the first mud inlet 4611, and then enters the first drill rod 50 and the second drill rod 60 through the two connecting pipes 44. Finally, the mud discharge device 30 discharges the mud in the first drill rod 50 and the second drill rod 60 through the mud discharge pipe, so that drilling and mud discharge can be carried out simultaneously without stopping the equipment to discharge the mud.

[0077] Combined with appendix Figure 10 and 11As shown, in some examples, optionally, the drive assembly 45 includes a drive mechanism (not shown), two transmission gear sets 451, and an intermediate gear 452. The drive mechanism may include one or two motors. When the drive mechanism includes one motor, the two first gears 4511 of the two transmission gear sets 451 can be driven to rotate by one motor and a transmission structure. In this case, the transmission structure can be a gear drive or a shaft drive, as long as it can transmit the torque of the output shaft of one motor to the two first gears 4511. When the drive mechanism includes two motors, the two motors are connected to the two first gears 4511 in a one-to-one correspondence, thereby realizing that each of the two motors drives the first gear 4511 connected to it to rotate.

[0078] In this embodiment, the transmission gear set 451 is located on both sides of the intermediate gear 452 along a horizontal direction. The transmission gear set 451 includes a first gear 4511, a second gear 4512, a third gear 4513, a fourth gear 4514, a fifth gear 4515, and a sixth gear 4516.

[0079] In this embodiment, the first gear 4511 is connected to the drive mechanism and rotates under the drive of the drive mechanism. The second gear 4512 is located on the side of the first gear 4511 away from the other transmission gear set 451. The second gear 4512 has two rings of teeth along its own axial direction. One ring of teeth of the second gear 4512 meshes with the first gear 4511, and the other ring of teeth of the second gear 4512 meshes with the fourth gear 4514.

[0080] The sixth gear 4516 meshes with the fourth gear 4514. The diameter of the sixth gear 4516 is larger than that of the second gear 4512 and the fourth gear 4514. The diameter of the fourth gear 4514 is smaller than that of the second gear 4512 but larger than that of the first gear 4511. The two third gears 4513 mesh with the second gear 4512 respectively. A gap is formed between the two third gears 4513 to accommodate the first gear 4511. The fifth gear 4515 meshes with one of the third gears 4513. The diameters of the third gear 4513 and the fifth gear 4515 are larger than that of the first gear 4511, and the diameter of the fifth gear 4515 is smaller than that of the third gear 4513.

[0081] In this embodiment, the intermediate gear 452 is located between two transmission gear sets 451. The intermediate gear 452 meshes with the two fifth gears 4515 of the two transmission gear sets 451 respectively. The diameter of the intermediate gear 452 is larger than the diameter of the third gear 4513. Similarly to the second gear 4512, the fifth gear 4515 also has two rings of teeth arranged axially.

[0082] Accordingly, the plurality of drill bits in this embodiment include a first drill bit 46, a second drill bit 47, and a third drill bit 48. The two first drill bits 46 are coaxially connected to the two sixth gears 4516 of the two transmission gear sets 451 and rotate synchronously. The four second drill bits 47 are coaxially connected to the four third gears 4513 of the two transmission gear sets 451 and rotate synchronously. The third drill bit 48 is coaxially connected to the intermediate gear 452 and rotates synchronously.

[0083] During drilling, the first gear 4511 drives the second gear 4512 to rotate, and the second gear 4512 drives the two third gears 4513 to rotate, thereby driving the second drill bit 47 to rotate for drilling. The second gear 4512 also drives the fourth gear 4514 to rotate, and the fourth gear 4514 drives the sixth gear 4516 to rotate the rod, thereby driving the first drill bit 46 to drill. One of the third gears 4513 in each transmission gear set 451 drives the fifth gear 4515 to rotate, and the two fifth gears 4515 in the two transmission gear sets 451 simultaneously drive the intermediate gear 452 between them to rotate, thereby realizing the rotation of the third drill bit 48.

[0084] This structure requires only one or two motors to drive seven drill bits to rotate synchronously for drilling, which can effectively improve drilling efficiency, simplify the drive structure, and reduce the size and cost of the equipment.

[0085] Combined again with the appendix Figure 10 As shown, in some examples, optionally, in this embodiment, two first drill bits 46 are located at opposite ends on the lower side of the first housing 41 along the first direction X (horizontal direction), the first direction X being perpendicular to the arrangement direction (vertical direction) from the first housing 41 to the second housing 43, and four second drill bits 47 are located between the two first drill bits 46 and surround the first drill bits 46 to form a drilling array.

[0086] Specifically, the first drill bit 46 in this embodiment includes a drill pipe 461 and a drill cylinder 462. The upper end of the drill pipe 461 is coaxially connected to the first gear 4511 and communicates with the mud flow channel. The lower end of the drill pipe 461 is provided with a first mud inlet 4611. The drill cylinder 462 is installed at the lower end of the drill pipe 461. The side wall of the drill cylinder 462 is provided with a plurality of second mud inlets. The inner wall and / or outer wall of the drill cylinder 462 are provided with a plurality of first drilling cones 463. The first drilling cones 463 can further improve drilling efficiency.

[0087] The second drill bit 47 in this embodiment includes a first rotating rod 471 and a first rotating blade 472 spirally disposed on the first rotating rod 471 along its length. The bottom of the first rotating blade 472 is provided with a plurality of second drilling cones 473. Along the arrangement direction from the first housing 41 to the second housing 43, the distance between the bottom of the first rotating blade 472 and the second housing 43 is greater than the distance between the bottom of the first drill bit 46 and the second housing 43. The distance between the bottom of the first drill bit 46 and the second housing 43 is greater than or equal to the distance between the bottom of the third drill bit 48 and the second housing 43. The third drill bit 48 includes a second rotating rod 481, a second rotating blade 482 spirally disposed on the second rotating rod 481 along its length, and a third drilling cone 483 located at the bottom of the second rotating blade 482.

[0088] This trenching machine is designed with a combination of large cylindrical drill bits on both sides and an extended auger drill bit in the middle. The cylindrical drill bits are used for trench positioning and widening, while the auger drill bit efficiently removes slag. It adapts to complex geological formations (simultaneously addressing hard soil breaking and soft soil collapse prevention), optimizes power distribution (division of labor reduces energy consumption), and improves trenching quality, resulting in smooth and clean trench walls. The entire machine achieves efficient and precise trenching operations through functional synergy.

[0089] To further improve the design, the second housing 43 includes a bottom wall and side walls connected to the perimeter of the bottom wall. The side wall opposite to the first housing 41 is provided with a plurality of first serrations 431. The first serrations 431 are located below the bottom wall and are spaced apart along the circumferential direction of the side wall. Alternatively, the perimeter of the bottom wall is provided with a plurality of spaced second serrations.

[0090] The above technical solution includes three implementation methods, one of which is as follows: Figure 10 The first sawtooth 431 is provided on the side wall, another is provided on the bottom wall (this embodiment is not shown in the figure), and yet another is provided on the bottom wall while providing the first sawtooth 431 on the side wall.

[0091] The sharp edges of the first and second saw teeth 431 allow for more effective cutting into hard formations (such as rock layers and dense gravel layers), reducing slippage and improving drilling efficiency. Furthermore, the first and second saw teeth 431 and 431 disperse contact stress, preventing large-area friction on the bottom wall and extending the service life of the second housing 43. In addition, the interlocking action of the first and second saw teeth 431 suppresses drill bit deviation, especially improving verticality in inclined or uneven formations. Finally, the gaps between the saw teeth facilitate the flow of broken rock and soil particles, preventing the accumulation and blockage of cuttings.

[0092] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A multi-head drilling and trenching machine for low-headroom diaphragm walls, characterized in that, include: The body includes a base frame and a walking mechanism mounted on the bottom of the base frame, wherein the base frame is provided with a first through hole; Two support devices are installed on the base frame and are located on both sides of the first through hole, respectively; The slurry discharge device is connected to the two support devices respectively; as well as A drilling device, connected to the slurry discharge device and capable of passing through the first through hole, the drilling device being configured to allow slurry to enter its interior, the drilling device being connected to the slurry discharge device for discharging slurry that has entered the interior of the drilling device.

2. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 1, characterized in that, The support device includes a support frame, a telescopic mechanism, and a lifting mechanism. The bottom of the support frame is hinged to the base frame, the lower end of the telescopic mechanism is hinged to the base frame, and the upper end of the telescopic mechanism is hinged to the upper end of the support frame. The telescopic mechanism is configured to drive the support frame to rotate on the base frame. The lifting mechanism is installed on the support frame, and the drilling device is connected to the lifting mechanism.

3. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 2, characterized in that, The slurry discharge device includes a mounting frame, a slurry pump, a slurry discharge pipeline, and a slurry discharge pipeline. The two opposite ends of the mounting frame are installed on the two support devices. The slurry pump is installed on the mounting frame and has a slurry discharge port. One end of the slurry discharge pipeline is connected to and communicates with the slurry pump, and the other end of the slurry discharge pipeline is connected to and communicates with the drilling device. The slurry discharge pipeline is connected to and communicates with the slurry discharge port. The slurry pump is used to draw slurry from the slurry discharge pipeline and discharge the slurry through the slurry discharge pipeline.

4. The low-clearance diaphragm wall multi-head trenching machine according to claim 3, characterized in that, The number of slurry pumps, slurry outlet pipes, and slurry discharge pipes are two each. One of the two slurry outlet pipes is a curved pipe, and the other of the two slurry outlet pipes is a straight pipe. The upper end of the curved pipe is connected to and communicates with one of the slurry pumps, and the lower end of the curved pipe is connected to and communicates with the drilling device. The upper end of the straight pipe is connected to and communicates with the other slurry pump, and the lower end of the straight pipe is connected to and communicates with the drilling device. The two slurry discharge pipes are respectively connected to and communicate with the slurry discharge ports of the two slurry pumps.

5. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to any one of claims 1-4, characterized in that, The low-headroom diaphragm wall multi-head drilling trenching machine also includes a drill rod. The upper end of the drill rod is connected and communicates with the slurry discharge device, and the lower end of the drill rod is connected and communicates with the drilling device. When the slurry discharge device includes a mounting frame, two slurry pumps, two slurry discharge pipes, and two slurry discharge pipes, the drill rod includes a first drill rod and a second drill rod. The upper end of the first drill rod is connected and communicates with the lower end of one of the slurry discharge pipes, and the lower end of the first drill rod is connected and communicates with the drilling device. The upper end of the second drill rod is connected and communicates with the lower end of the other slurry discharge pipe, and the lower end of the second drill rod is connected and communicates with the drilling device.

6. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 5, characterized in that, The low-headroom underground continuous wall multi-head drilling trenching machine also includes a fastening device, which includes an integrally connected first annular part and a second annular part. The first annular part is provided with a first limiting hole, and the second annular part is provided with a second limiting hole. The first drill rod passes through the first limiting hole and fits against the hole wall of the first limiting hole, and the second drill rod passes through the second limiting hole and fits against the hole wall of the second limiting hole.

7. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 5, characterized in that, The drilling device includes a first housing, two connecting pipes, a second housing, two conductive pipes, a drive assembly, and multiple drill bits. The first housing is located above the second housing and has a second through hole and a third through hole. The first drill rod passes through the second through hole, and the second drill rod passes through the third through hole. One end of the first housing is connected to one side of the second housing through one of the connecting pipes, and the other end of the first housing is connected to the other side of the second housing through the other connecting pipe. The multiple drill bits are mounted on the bottom of the second housing in a manner that allows them to rotatably around their own axial direction. Located below the second housing, the drive assembly is installed inside the second housing and connected to the plurality of drill bits. The drive assembly is used to drive the plurality of drill bits to rotate. At least a portion of the plurality of drill bits is provided with a first mud inlet. The second housing is provided with a mud flow channel connected to the first mud inlet. The two connecting pipes are installed on the top of the second housing. The lower ends of the two connecting pipes are respectively connected to the mud flow channel. The upper end of one of the two connecting pipes is connected to and communicates with the lower end of the first drill rod. The upper end of the other of the two connecting pipes is connected to and communicates with the second drill rod.

8. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 7, characterized in that, The drive assembly includes a drive mechanism, two transmission gear sets, and an intermediate gear. Each transmission gear set includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, and a sixth gear. The first gear is connected to the drive mechanism and rotates under its drive. The second gear meshes with the first gear and is located on the side of the first gear away from the other transmission gear set. The fourth gear meshes with the second gear, and the sixth gear meshes with the fourth gear. The diameter of the sixth gear is larger than both the second and fourth gears. The diameter of the fourth gear is smaller than the diameter of the second gear but larger than the diameter of the first gear. Two third gears mesh with the second gears, forming a space between them to accommodate the first gear. The gears are spaced apart. The fifth gear meshes with one of the third gears. The diameters of the third gear and the fifth gear are both larger than the diameter of the first gear, and the diameter of the fifth gear is smaller than the diameter of the third gear. The intermediate gear is located between the two transmission gear sets and meshes with two of the fifth gears in each of the two transmission gear sets. The diameter of the intermediate gear is larger than the diameter of the third gear. The plurality of drill bits includes a first drill bit, a second drill bit, and a third drill bit. The two first drill bits are coaxially connected to the two sixth gears of the two transmission gear sets and rotate synchronously. The four second drill bits are coaxially connected to the four third gears of the two transmission gear sets and rotate synchronously. The third drill bit is coaxially connected to the intermediate gear and rotates synchronously.

9. The multi-head drilling and trenching machine for low-headroom diaphragm walls according to claim 8, characterized in that, Two first drill bits are located at opposite ends on the lower side of the first housing along a first direction, the first direction being perpendicular to the arrangement direction from the first housing to the second housing. Four second drill bits are located between the two first drill bits and surround the first drill bits. Each first drill bit includes a drill pipe and a drill cylinder. The upper end of the drill pipe is coaxially connected to the first gear and communicates with the mud flow channel. The lower end of the drill pipe has a first mud inlet. The drill cylinder is installed at the lower end of the drill pipe. The side wall of the drill cylinder has multiple second mud inlet holes, and the inner and / or outer wall of the drill cylinder has multiple first drilling cones. The second drill bit includes a first rotating rod and a first vane spirally disposed on the first rotating rod along its length. The bottom of the first vane is provided with a plurality of second drilling cones. Along the arrangement direction from the first housing to the second housing, the distance between the bottom of the first vane and the second housing is greater than the distance between the bottom of the first drill bit and the second housing. The distance between the bottom of the first drill bit and the second housing is greater than or equal to the distance between the bottom of the third drill bit and the second housing. The third drill bit includes a second rotating rod and a second vane spirally disposed on the second rotating rod along its length.

10. The low-clearance diaphragm wall multi-head trenching machine according to claim 7, characterized in that, The second housing includes a bottom wall and side walls connected around the bottom wall. The side walls opposite to the first housing have a plurality of first serrations. The first serrations are located below the bottom wall and are spaced apart along the circumferential direction of the side walls. Alternatively, the bottom wall has a plurality of spaced second serrations around its perimeter.

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