In-hole matched dust fall treatment device suitable for cantilever type heading machine

Abstract

The utility model relates to an in-hole matched dust fall treatment device suitable for a cantilever type heading machine. The in-hole matched dust falling treatment device suitable for the cantilever type heading machine comprises a negative pressure air pipe, a multi-partition-plate dust falling room and a settling pond. The negative pressure air pipe is installed in a tunnel, one end of the negative pressure air pipe is located on a tunneling face, the other end of the negative pressure air pipe is communicated with the multi-partition-plate dust falling room through the vortex fan, partition plates are arranged in the multi-partition-plate dust falling room, a water supply pipe is installed in the multi-partition-plate dust falling room, atomizing nozzles are evenly distributed on the water supply pipe, and a drainage ditch is formed in the bottom of the multi-partition-plate dust falling room and communicated with the sedimentation tank. The device has the advantages of efficient dust collection and sedimentation, in-hole arrangement to avoid environmental pollution, high systematicness and the like, and the problems of dust overflow, low dust falling efficiency, water resource waste and the like in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering construction technology, and in particular to a dust suppression device for tunneling machines. Background Technology

[0002] In water conservancy engineering tunnel construction, cantilever tunneling machines are widely used in projects with thin overburden layers or near sensitive buildings (such as residential buildings and enterprises) due to their non-blasting excavation characteristics. However, tunneling machines generate a large amount of dust when cutting rock, and relying solely on the equipment's built-in dust suppression system is insufficient to effectively control dust dispersion. In traditional methods, dust easily overflows to the tunnel entrance with the airflow inside the tunnel, not only reducing visibility and affecting operational safety but also polluting the surrounding environment, and even triggering environmental complaints or construction halts.

[0003] Current common dust control measures (such as single spraying or ventilation) suffer from low dust capture efficiency and water waste, especially in long tunnels or enclosed construction environments where their effectiveness is limited. Furthermore, external sedimentation tanks or dust removal equipment often occupy additional space, making them difficult to implement in space-constrained projects. Therefore, there is an urgent need to develop an integrated, high-efficiency in-tunnel dust control system capable of rapid collection, settling, and recycling near the dust source, while also meeting the layout requirements of confined tunnel spaces, fundamentally solving the dust control challenges in cantilever tunnel construction. Utility Model Content

[0004] To address or partially address the problems existing in related technologies, this application provides an in-tunnel dust suppression device suitable for cantilever tunneling machines, which can solve problems such as dust overflow, low dust suppression efficiency, and water waste in the prior art.

[0005] This application provides a dust suppression device for tunnel boring machines, including a negative pressure duct 1, a multi-partition dust suppression chamber 2, and a sedimentation tank 3. The negative pressure duct 1 is installed inside the tunnel, with one end at the tunnel face and the other end connected to the multi-partition dust suppression chamber 2 via a vortex fan. The multi-partition dust suppression chamber 2 is equipped with partitions 4 and a water supply pipe 5. Atomizing nozzles 6 are evenly distributed on the water supply pipe 5. A drainage ditch 7 is opened at the bottom of the multi-partition dust suppression chamber 2, and the drainage ditch 7 is connected to the sedimentation tank 3.

[0006] Optionally, in some embodiments, the multi-partition dust collection chamber 2 is provided with at least two staggered partitions 4.

[0007] Optionally, in some schemes, the negative pressure duct 1, the multi-partition dust suppression chamber 2, and the sedimentation tank 3 are located in the enlarged excavation space on one side of the tunnel.

[0008] Optionally, in some embodiments, the sedimentation tank 3 includes a primary sedimentation tank 31 and a secondary sedimentation tank 32, the drainage ditch 6 connects to the primary sedimentation tank 31, the primary sedimentation tank 31 connects to the secondary sedimentation tank 32, and the secondary sedimentation tank 32 connects to the water supply mechanism of the water supply pipe 5.

[0009] Optionally, in some embodiments, the side walls of the multi-partition dust suppression chamber 2 are provided with air outlets.

[0010] The technical solution provided in this application may include the following beneficial effects:

[0011] This application enables efficient dust collection and settling: it uses a negative pressure rigid air duct in conjunction with a vortex fan to draw dust from the working face at close range, and reduces wind resistance through a smooth inner wall to ensure efficient delivery to the dust settling chamber; the dust settling chamber is equipped with staggered baffles to form a vortex, which prolongs the dust retention time, and combined with dense atomizing nozzles to achieve all-round water mist coverage, significantly improving dust settling efficiency.

[0012] The layout inside the tunnel avoids environmental pollution: By laterally expanding the tunnel, dust suppression rooms and sedimentation tanks are arranged so that dust can be captured and treated inside the tunnel, effectively preventing dust from spreading to the tunnel entrance and polluting the surrounding environment. This is especially suitable for non-blasting excavation projects near buildings or sensitive areas.

[0013] Circular environmental protection system: Wastewater after dust suppression flows into a two-stage sedimentation tank through a drainage ditch. The clear water from the sedimentation can be recycled for construction and maintenance, dust suppression by watering, and can also be recycled into the water supply pipe for dust suppression, achieving zero water discharge and reducing environmental impact.

[0014] Strong system integration: It forms a closed loop from dust collection, transportation, and sedimentation to sewage treatment, solving problems such as insufficient coverage of the dust suppression system and pollution at the tunnel entrance of traditional tunneling machines. It is especially suitable for non-blasting excavation projects in sensitive areas (such as adjacent buildings).

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0017] Figure 1 This is a schematic diagram of the layout structure of an in-tunnel dust suppression device suitable for cantilever tunneling machines, as shown in the embodiments of this application.

[0018] Figure 2 This is a schematic front view of the dust suppression device for tunneling machines that is suitable for cantilever tunneling machines, as shown in the embodiments of this application.

[0019] Figure 3 This is a schematic diagram of the internal structure of a multi-partition dust collection chamber as shown in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the installation structure of the atomizing nozzle shown in an embodiment of this application.

[0021] Figure label:

[0022] 1-Negative pressure duct, 2-Multi-partition dust suppression room, 3-Sedimentation tank, 4-Partition, 5-Water supply pipe, 6-Atomizing nozzle, 7-Drainage ditch, 8-Protective fence, 31-Primary sedimentation tank, 32-Secondary sedimentation tank. Detailed Implementation

[0023] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0024] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] To address the aforementioned issues, this application provides an in-tunnel dust suppression device suitable for cantilever tunneling machines, which can solve problems such as dust overflow, low dust suppression efficiency, and water waste in the prior art.

[0028] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] See Figure 1-4 The dust suppression device for tunnel boring machines includes a negative pressure duct 1, a multi-partition dust suppression chamber 2, and a sedimentation tank 3. The negative pressure duct 1 is installed inside the tunnel, with one end at the tunnel face and the other end connected to the multi-partition dust suppression chamber 2 via a vortex fan. The multi-partition dust suppression chamber 2 is equipped with at least two staggered partitions 4 and a water supply pipe 5. Atomizing nozzles 6 are evenly distributed on the water supply pipe 5. A drainage ditch 7 is provided at the bottom of the multi-partition dust suppression chamber 2, and the drainage ditch 7 is connected to the sedimentation tank 3.

[0030] During operation, the negative pressure duct 1 is a rigid negative pressure duct with a smooth inner wall and a diameter of 600-800mm. It is connected to the tunnel face and the multi-partition dust suppression chamber 2 by a vortex fan (power 55-75kW) to suck up and transport dust. The negative pressure generated by the fan sucks up and transports the dust-laden airflow to the multi-partition dust suppression chamber 2 at a speed of 15-20m / s. The distance between the negative pressure duct 1 and the tunnel face is controlled within 50m. The multi-partition dust suppression chamber 2 is equipped with staggered partitions 4 to form a vortex, and is equipped with a water supply pipe 5 and atomizing nozzles 6 for spraying dust suppression. The drainage ditch 7 is located at the bottom of the multi-partition dust suppression chamber 2 and is connected to the sedimentation tank 3 to realize the collection and recycling of sewage.

[0031] The multi-partition dust suppression chamber 2 is equipped with at least two partitions 4, each 1.5m wide, arranged in an alternating pattern to form an "S"-shaped airflow vortex, extending the dust retention time. Multiple water supply pipes 5 are installed on the side walls and top of the multi-partition dust suppression chamber 2. Three DN50 water supply pipes are installed on the top and two side walls of the multi-partition dust suppression chamber 2. Each water supply pipe 5 is equipped with an atomizing nozzle 6 (spray particle size 50-100μm) every 50cm. The water pressure is controlled at 0.3-0.5MPa to achieve all-round water mist coverage. The bottom of the multi-partition dust suppression chamber 2 is equipped with a longitudinal drainage ditch 7 (20cm×20cm) with a slope of not less than 3%. The drainage ditch 7 is connected to the sedimentation tank 3. The sewage is treated in the sedimentation tank 3 to form recyclable clean water for construction maintenance or dust suppression operations.

[0032] In some embodiments, the negative pressure duct 1, the multi-partition dust suppression chamber 2, and the sedimentation tank 3 are located in the enlarged excavation space on one side of the tunnel.

[0033] During operation, the negative pressure duct 1, the multi-partition dust suppression chamber 2, and the sedimentation tank 3 are located in the enlarged excavation space on one side of the tunnel. While ensuring the passage width of the tunnel, the dust is sealed inside the tunnel to prevent dust from overflowing to the tunnel entrance and polluting the environment.

[0034] In some embodiments, the sedimentation tank 3 includes a primary sedimentation tank 31 and a secondary sedimentation tank 32, the drainage ditch 6 connects to the primary sedimentation tank 31, the primary sedimentation tank 31 connects to the secondary sedimentation tank 32, and the secondary sedimentation tank 32 connects to the water supply mechanism of the water supply pipe 5.

[0035] During operation, a 20cm x 20cm drainage ditch 7 with a slope of not less than 3% is installed at the bottom of the multi-partition dust suppression chamber 2, connecting to the primary sedimentation tank 31 (volume 8-10m³). The effluent from the primary sedimentation tank 31 overflows into the secondary sedimentation tank 32 (volume 6-8m³), both sedimentation tanks are equipped with inclined plate packing. The treated clean water is pumped back to the dust suppression system, forming a closed-loop circulation. During system operation, the sludge in the sedimentation tank 3 needs to be cleaned regularly (every 2-3 days), and the atomizing nozzles 6 need to be checked for blockage. A protective fence 8 is also installed around the sedimentation tank 3.

[0036] In some embodiments, the side walls of the multi-partition dust collection chamber 2 are provided with air outlets.

[0037] During operation, a 30cm×30cm air outlet is opened on the side wall of the multi-partition dust settling chamber 2 to balance the airflow and ensure air circulation in the dust settling chamber, while preventing dust from leaking out. An adjustable damper is installed to control the exhaust volume and maintain a slightly negative pressure state (-50 to -100Pa) in the dust settling chamber.

[0038] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0039] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0040] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A dust suppression device for use inside tunnels with cantilever tunneling machines, characterized in that: The dust suppression device for tunnel boring machines includes a negative pressure duct (1), a multi-partition dust suppression chamber (2), and a sedimentation tank (3). The negative pressure duct (1) is installed inside the tunnel, with one end at the tunnel face and the other end connected to the multi-partition dust suppression chamber (2) via a vortex fan. The multi-partition dust suppression chamber (2) is equipped with partitions (4) and a water supply pipe (5). Atomizing nozzles (6) are evenly distributed on the water supply pipe (5). A drainage ditch (7) is opened at the bottom of the multi-partition dust suppression chamber (2), and the drainage ditch (7) is connected to the sedimentation tank (3).

2. The dust suppression device for tunnel boring machines according to claim 1, characterized in that: The multi-partition dust collection chamber (2) is provided with at least two staggered partitions (4).

3. The dust suppression device for tunnel boring machines according to claim 1 or 2, characterized in that: The negative pressure duct (1), the multi-partition dust suppression chamber (2) and the sedimentation tank (3) are located in the enlarged excavation space on one side of the tunnel.

4. The dust suppression device for tunnel boring machines according to claim 3, characterized in that: The sedimentation tank (3) includes a primary sedimentation tank (31) and a secondary sedimentation tank (32). The drainage ditch (7) is connected to the primary sedimentation tank (31), the primary sedimentation tank (31) is connected to the secondary sedimentation tank (32), and the secondary sedimentation tank (32) is connected to the water supply mechanism of the water supply pipe (5).

5. The dust suppression device for tunnel boring machines according to claim 4, characterized in that: The side wall of the multi-partition dust suppression room (2) is provided with an air outlet.

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