A cantilever tunnel boring machine with dust removal function

Abstract

The present invention relates to the technical field of coal tunneling machines, and discloses a cantilever tunneling machine with a dust removal function, including a main structure, a cantilever structure and a shovel plate are installed at the front end of the main structure, the cantilever structure is located above the shovel plate, the cantilever structure includes a drive motor, a telescopic assembly, a transmission assembly and a cutting head, the drive motor is connected to the cutting head through the transmission assembly; the outer side of the transmission assembly is sleeved with a telescopic assembly, an annular cavity through which air can pass is formed between the transmission assembly and the telescopic assembly, an air intake assembly is installed in the annular cavity, the air intake assembly rotates synchronously with the transmission assembly and drives the air to flow. In the present invention, the external air enters the interior of the inner tube body through the through groove I, the flowing air drives the dust generated during the mining process into the inner tube body, the entered air is discharged through the filter element, and the dust in the air is filtered by the filter element, thereby reducing the dust generated during the mineral mining process.

Description

Technical Field

[0001] The present invention relates to the technical field of coal tunneling machines, and more particularly to a cantilever tunneling machine with a dust removal function. Background Art

[0002] During the construction of soft rock tunnels, tunnel boring machines are often required for excavation operations. When the gravel generated by the tunnel boring machines falls during excavation, a large amount of dust particles will be generated, causing the excavation working environment to be polluted. Therefore, the excavation working environment needs to be treated.

[0003] During the excavation operation, the existing tunnel boring machine usually uses an external dust suction structure to absorb the floating dust particles generated by the excavation operation. For example, a cantilever tunnel boring machine with a dust removal function disclosed in the Chinese invention patent application with publication number CN117449848A has a dust suction component including a first dust suction hood, a second dust suction hood and a fan. The first dust suction hood is located on the tunneling arm, and the first dust suction hood is connected to the air inlet of the fan through a pipeline, and the air outlet of the fan is connected to an exhaust pipe. Since the first dust suction hood and the pipeline are both external, they are easily damaged by falling rocks during the operation of the tunnel boring machine.

[0004] The Chinese invention patent application with publication number CN109667580A discloses a multi-cutting arm tunneling mechanism and tunneling machine, and its specification discloses that an electric control system, a hydraulic system and a cooling spray dust reduction system are provided on the machine body. The dust reduction effect of using spray alone is poor and cannot meet the work requirements.

[0005] Therefore, it is necessary to improve the prior art. Summary of the invention

[0006] The object of the present invention is to provide a cantilever tunneling machine with a dust removal function to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A cantilever roadheader with a dust removal function comprises a main structure, a cantilever structure and a shovel plate are installed at the front end of the main structure, the cantilever structure is located above the shovel plate, the cantilever structure comprises a drive motor, a telescopic assembly, a transmission assembly and a cutting head, the drive motor is connected to the cutting head through the transmission assembly; the telescopic assembly is sleeved on the outer side of the transmission assembly, an annular cavity through which air can pass is formed between the transmission assembly and the telescopic assembly, an air inlet assembly is installed in the annular cavity, the air inlet assembly rotates synchronously with the transmission assembly and drives air flow;

[0009] The telescopic assembly comprises a fixed seat, an inner tube body, a movable seat and an outer tube body, the outer tube body is sleeved on the inner tube body, the fixed seat is fixedly connected to the inner tube body, the movable seat is fixedly connected to the outer tube body, one end of the fixed seat is fixedly arranged on the driving motor, and a first telescopic rod is arranged between the fixed seat and the movable seat;

[0010] There is a gap between the inner tube body and the outer tube body, the outer tube body is provided with a through groove I communicating with the annular cavity, the fixing seat is provided with a notch communicating with the annular cavity, and a filter element is provided in the notch;

[0011] An air guide sleeve is installed at the connection between the fixing seat and the inner tube body.

[0012] Preferably, the air guide sleeve comprises a conical sleeve body, a bracket 1 and a bracket 2 are respectively installed at two ends of the sleeve body, a sleeve is rotatably arranged between the bracket 1 and the bracket 2, the transmission assembly comprises a first shaft body, the sleeve is coaxially arranged with the first shaft body, and a spiral blade is fixedly arranged on the outer side of the sleeve;

[0013] The outer surface of the sleeve body is provided with a plurality of long grooves, a baffle is obliquely installed on one side of the long groove, the inner side of the small end of the sleeve body is connected with the inner cavity of the fixing seat, and a filter screen is arranged between the outer side of the small end of the sleeve body and the inner cavity of the fixing seat.

[0014] Preferably, a through groove II is provided on the lower side of the inner tube body at a position corresponding to the sleeve body, and a dust collecting box is installed on the lower side of the through groove II.

[0015] Preferably, a water supply pipe is arranged on the outer side of the inner tube body, and a plurality of atomizing nozzles are arranged on the water supply pipe along the circumferential direction.

[0016] Preferably, the atomizing nozzle is connected to the water supply pipe through a rotating joint, a torsion spring is arranged between the atomizing nozzle and the water supply pipe, a push plate for controlling the angle of the atomizing nozzle is arranged on the inner tube body, the push plate is slidably connected to the inner tube body, and the push plate is connected to a linear drive.

[0017] Preferably, first hinged seats are provided on opposite sides of the fixed seat, connecting seats are provided on opposite sides of the movable seat, and two ends of the first telescopic rod are hinged to the first hinged seat and the connecting seat respectively.

[0018] Preferably, a clamping seat is provided at one end of the driving motor, and the clamping seat is connected to the main structure via a pin shaft;

[0019] The second hinged seats are arranged on both opposite side surfaces of the fixing seat, the second hinged seats are connected with the second telescopic rod, and one end of the second telescopic rod away from the second hinged seat is hinged on the main structure.

[0020] Preferably, a cutting head is sleeved on the end of the outer tube, and the transmission assembly further comprises a second shaft body, one end of the first shaft body is a spline shaft, one end of the second shaft body is provided with a spline hole, and the spline shaft is inserted into the spline hole of the second shaft body;

[0021] The other end of the first shaft is connected to the cutting head.

[0022] Preferably, there are two notches, which are respectively arranged on two opposite side surfaces of the fixing seat; the notch and the second hinge seat are not located on the same side surface.

[0023] Preferably, a plurality of metal strips are provided on the outer side surface of the outer tube body, and the metal strips are arranged along the axial direction of the outer tube body.

[0024] The present invention has the following beneficial effects:

[0025] 1. In the present invention, the external air enters the inner tube body through the through slot I, and the flowing air drives the dust generated during the mining process into the inner tube body. The air entering is discharged through the filter element, and the dust in the air is filtered by the filter element, thereby reducing the dust generated during the mineral mining process. The through slot I is set on the outer tube body, and there is no need for an external dust suction port, which can prevent the dust suction port from affecting the normal operation of the cutting head. At the same time, there is no need for an external dust suction pipe, which can prevent falling rocks from damaging the dust suction pipe and affecting the dust suction effect.

[0026] 2. The present invention provides an air guide sleeve at the connection between the fixed seat and the inner tube body. The spiral blades in the air guide sleeve give the flowing air a certain centrifugal force, so that the dust in the air gathers to the surface of the sleeve body and is discharged out of the sleeve body through the long groove. A baffle is provided on one side of the long groove. The inclination direction of the baffle from inside to outside is the same as the rotation direction of the spiral blades, so as to prevent the discharged dust from returning to the sleeve body.

[0027] 3. When the mine of the present invention is being mined, excavation needs to be carried out through the cutting head. During the excavation process, the splashing ore will hit the cantilever structure. The telescopic component sleeved on the outside of the transmission component can protect the outside of the transmission component to avoid damage to the transmission component during work, thereby effectively extending the service life.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the cantilever structure of the present invention;

[0031] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0032] Figure 3 It is a schematic cross-sectional view of the cantilever structure of the present invention;

[0033] Figure 4 It is a partial cross-sectional schematic diagram of the cantilever structure of the present invention;

[0034] Figure 5 It is a schematic diagram of the fixing seat of the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the air guide sleeve;

[0036] Figure 7 Schematic diagram of the internal structure of the air guide sleeve;

[0037] Figure 8 This is a schematic diagram of the explosion of the air guide sleeve;

[0038] Fig. 9 It is a schematic diagram of the overall structure of the present invention;

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] In the figure: 1, driving motor; 101, clamping seat; 2, fixing seat; 201, first hinge seat; 202, second hinge seat; 203, notch; 204, filter; 3, inner tube; 301-through slot II; 302-dust box; 4, moving seat; 401, connecting seat; 5, outer tube; 501, through slot I; 6, cutting head; 7, first shaft; 8, second shaft; 9, air inlet assembly; 10 , air guide sleeve; 1001, sleeve body; 1002, long groove; 1003, bracket one; 1004, bracket two; 1005, baffle; 1006, spiral blade; 11, filter element; 12, first telescopic rod; 13, metal strip; 14, second telescopic rod; 15, main structure; 16, shovel plate; 17-water supply pipe; 1701-atomizing nozzle; 1702-push plate; 1703-linear drive. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1-Figure 9As shown, the present invention is a cantilever tunneling machine with dust removal function, including a main structure 15, the main structure 15 includes a chassis structure, a walking part is installed at the bottom of the chassis structure, a conveying part is installed in the middle of the chassis structure, the feeding end of the conveying part is connected with the discharging end of the shovel plate 16 for conveying materials, the walking part adopts a crawler structure, and the conveying part adopts a scraper conveying structure.

[0043] A cantilever structure and a shovel plate 16 are installed on the same side of the main structure 15, and the cantilever structure is located above the shovel plate 16. The cantilever structure includes a drive motor 1, a telescopic assembly, a transmission assembly and a cutting head 6. The drive motor 1 is connected to the cutting head 6 through the transmission assembly to drive the cutting head 6 to work.

[0044] During mining, excavation is carried out through the cutting head 6. In order to prevent the splashing ore from hitting the transmission component during the excavation process, a telescopic component is sleeved on the outside of the transmission component. The telescopic component is used to protect the outside of the transmission component to avoid damage to the transmission component during work, thereby effectively extending the service life.

[0045] An annular cavity through which air can pass is formed between the transmission assembly and the telescopic assembly. An air inlet assembly 9 is installed in the annular cavity. The air inlet assembly 9 can adopt a fan structure. The blades of the air inlet assembly 9 rotate synchronously with the transmission assembly and drive the air to flow along the annular cavity.

[0046] The telescopic assembly includes a fixed seat 2, an inner tube body 3, a movable seat 4 and an outer tube body 5. The outer tube body 5 is sleeved on the outside of the inner tube body 3 and forms a protective structure together with the inner tube body 3. The fixed seat 2 is fixedly connected to the inner tube body 3, and the movable seat 4 is fixedly connected to the outer tube body 5. One end of the fixed seat 2 is fixedly set on the housing of the driving motor 1. A first telescopic rod 12 is set between the fixed seat 2 and the movable seat 4. The movable seat 4 is driven to move relative to the fixed seat 2 by the first telescopic rod 12, thereby adjusting the working length of the telescopic assembly.

[0047] In order to install the first telescopic rod 12, first articulated seats 201 are provided on opposite sides of the fixed seat 2, and connecting seats 401 are provided on opposite sides of the movable seat 4. Both ends of the first telescopic rod 12 are respectively articulated with the first articulated seats 201 and the connecting seats 401. Preferably, the first telescopic rod 12 adopts a hydraulic cylinder.

[0048] In order to adjust the working angle of the cantilever structure, a clamping seat 101 is provided at one end of the driving motor 1, and the clamping seat 101 is connected to the main structure 15 through a pin shaft; second hinge seats 202 are provided on opposite sides of the fixing seat 2, and the second hinge seat 202 is connected to the second telescopic rod 14, and one end of the second telescopic rod 14 away from the second hinge seat 202 is hinged to the main structure 15. Preferably, the second telescopic rod 14 adopts a hydraulic cylinder.

[0049] The outer tube body 5 is provided with a through groove Ⅰ501 connected with the annular cavity, and the through groove Ⅰ501 is used for air intake. There is a gap between the inner tube body 3 and the outer tube body 5. The fixed seat 2 is provided with a notch 203 connected with the annular cavity. Dust-containing air enters the annular cavity from the through groove Ⅰ501 under the action of the air inlet component 9 and is discharged from the notch 203. A filter element 11 is provided in the notch 203 to intercept dust in the air.

[0050] The through groove I 501 is located on the side close to the cutting head 6, which is convenient for quickly absorbing the generated dust, thereby solving the problem that the air inlet of the existing dust removal structure is far away from the cutting head 6 and the dust absorption can only be achieved after the dust has spread to a certain range.

[0051] An air guide sleeve 10 is installed at the connection between the fixed seat 2 and the inner tube body 3. The air guide sleeve 10 includes a conical sleeve body 1001, which is fixedly connected to the inner tube body 3. A bracket 1003 and a bracket 2 1004 are respectively installed at both ends of the sleeve body 1001. A sleeve is rotatably arranged between the bracket 1003 and the bracket 2 1004. The sleeve is coaxially arranged with the first shaft body 7 and can rotate relative to the first shaft body 7. A spiral blade 1006 is fixedly arranged on the outer side of the sleeve. The air flowing inside the inner tube body 3 drives the spiral blade 1006 to rotate. During the rotation of the spiral blade 1006, the centrifugal force generated causes the dust to move toward the inner wall of the sleeve body 1001.

[0052] A plurality of long grooves 1002 are provided on the outer surface of the sleeve 1001, and a baffle 1005 is obliquely installed on one side of the long groove 1002. When the spiral blade 1006 rotates, some dust enters the long groove 1002 along the baffle 1005 and further enters between the sleeve 1001 and the inner tube body 3. A through groove II 301 is provided on the lower side of the inner tube body 3 at a position corresponding to the sleeve 1001, and a dust collecting box 302 is installed on the lower side of the through groove II 301. Dust enters the dust collecting box 302 through the through groove II 301 for collection.

[0053] The inner side of the small end of the sleeve 1001 is connected to the inner cavity of the fixing seat 2, and a filter screen 204 is arranged between the outer side of the small end of the sleeve 1001 and the inner cavity of the fixing seat 2. The dust that cannot be completely collected by the air guide sleeve 10 enters the inner cavity of the fixing seat 2 for further collection.

[0054] A water supply pipe 17 is arranged outside the inner tube body 3, and a plurality of atomizing nozzles 1701 are arranged along the circumference of the water supply pipe 17. The atomizing nozzle 1701 is connected to the water supply pipe 17 through a rotating joint, and a torsion spring is arranged between the atomizing nozzle 1701 and the water supply pipe 17. A push plate 1702 for controlling the angle of the atomizing nozzle 1701 is arranged on the inner tube body 3, and the push plate 1702 is slidably connected to the inner tube body 3, and the push plate 1702 is connected to a linear driver 1703. The atomizing nozzle 1701 is always attached to the push plate 1702 through the torsion spring, and the push plate 1702 is driven to move by the linear driver 1703, thereby driving the atomizing nozzle 1701 to rotate, so as to achieve synchronous adjustment of the angles of the plurality of atomizing nozzles 1701.

[0055] The end of the outer tube 5 is sleeved with a cutting head 6, and the transmission assembly includes a first shaft body 7 and a second shaft body 8. One end of the first shaft body 7 is a spline shaft, and one end of the second shaft body 8 is provided with a spline hole. The spline shaft is inserted into the spline hole of the second shaft body 8, so that the length of the transmission assembly can change with the extension and retraction of the telescopic assembly, while ensuring uninterrupted power transmission. The other end of the first shaft body 7 is connected to the cutting head 6 to drive the cutting head 6 to work.

[0056] Preferably, two slots 203 are provided and are respectively arranged on the opposite side surfaces of the fixing seat 2. The slot 203 and the second hinge seat 202 are not located on the same side. The filter element 11 is arranged in the slot 203. When replacing, the filter element 11 is pulled out to realize the disassembly of the discarded filter element 11.

[0057] A plurality of metal strips 13 are provided on the outer side of the outer tube body 5 . The metal strips 13 are arranged along the axial direction of the outer tube body 5 . The metal strips 13 provided on the outer side of the outer tube body 5 improve the structural strength of the outer tube body 5 .

[0058] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cantilever tunneling machine with a dust removal function, comprising a main structure (15), a cantilever structure and a shovel plate (16) being installed at the front end of the main structure (15), the cantilever structure being located above the shovel plate (16), and characterized in that: The cantilever structure comprises a drive motor (1), a telescopic assembly, a transmission assembly and a cutting head (6), wherein the drive motor (1) is connected to the cutting head (6) via the transmission assembly; the telescopic assembly is sleeved on the outer side of the transmission assembly, an annular cavity through which air can pass is formed between the transmission assembly and the telescopic assembly, an air inlet assembly (9) is installed in the annular cavity, and the air inlet assembly (9) rotates synchronously with the transmission assembly and drives air flow; The telescopic assembly comprises a fixed seat (2), an inner tube body (3), a movable seat (4) and an outer tube body (5); the outer tube body (5) is sleeved on the outer side of the inner tube body (3); the fixed seat (2) is fixedly connected to the inner tube body (3); the movable seat (4) is fixedly connected to the outer tube body (5); one end of the fixed seat (2) is fixedly arranged on the driving motor (1); and a first telescopic rod (12) is arranged between the fixed seat (2) and the movable seat (4); There is a gap between the inner tube body (3) and the outer tube body (5); the outer tube body (5) is provided with a through groove I (501) communicating with the annular cavity; the fixing seat (2) is provided with a notch (203) communicating with the annular cavity; a filter element (11) is provided in the notch (203); An air guide sleeve (10) is installed at the connection between the fixing seat (2) and the inner tube body (3); The air guide sleeve (10) comprises a conical sleeve body (1001), a bracket 1 (1003) and a bracket 2 (1004) are respectively mounted at two ends of the sleeve body (1001), a sleeve is rotatably arranged between the bracket 1 (1003) and the bracket 2 (1004), the transmission assembly comprises a first shaft body (7), the sleeve is coaxially arranged with the first shaft body (7), and a spiral blade (1006) is fixedly arranged on the outer side of the sleeve; A plurality of long grooves (1002) are provided on the outer surface of the sleeve (1001), a baffle (1005) is obliquely installed on one side of the long groove (1002), the inner side of the small end of the sleeve (1001) is connected to the inner cavity of the fixing seat (2), and a filter screen (204) is provided between the outer side of the small end of the sleeve (1001) and the inner cavity of the fixing seat (2).

2. The cantilever tunneling machine with dust removal function according to claim 1, characterized in that: A through groove II (301) is provided on the lower side of the inner tube body (3) at a position corresponding to the sleeve body (1001), and a dust collecting box (302) is installed on the lower side of the through groove II (301).

3. The cantilever tunneling machine with dust removal function according to claim 1, characterized in that: A water supply pipe (17) is arranged outside the inner tube body (3), and a plurality of atomizing nozzles (1701) are arranged along the circumference of the water supply pipe (17).

4. The cantilever tunneling machine with dust removal function according to claim 3, characterized in that: The atomizing nozzle (1701) is connected to the water supply pipe (17) via a rotating joint, a torsion spring is provided between the atomizing nozzle (1701) and the water supply pipe (17), a push plate (1702) for controlling the angle of the atomizing nozzle (1701) is provided on the inner tube body (3), the push plate (1702) is slidably connected to the inner tube body (3), and the push plate (1702) is connected to a linear drive (1703).

5. The cantilever tunneling machine with dust removal function according to claim 1, characterized in that: The fixed seat (2) is provided with a first hinge seat (201) on two opposite sides, the movable seat (4) is provided with a connecting seat (401) on two opposite sides, and the two ends of the first telescopic rod (12) are respectively hinged to the first hinge seat (201) and the connecting seat (401).

6. The cantilever tunneling machine with dust removal function according to claim 5, characterized in that: A clamping seat (101) is provided at one end of the driving motor (1), and the clamping seat (101) is connected to the main structure (15) via a pin shaft; Second hinged seats (202) are provided on opposite side surfaces of the fixing seat (2), a second telescopic rod (14) is connected to the second hinged seat (202), and one end of the second telescopic rod (14) away from the second hinged seat (202) is hinged to the main structure (15).

7. The cantilever tunneling machine with dust removal function according to claim 1, characterized in that: The end of the outer tube (5) is sleeved with a cutting head (6), the transmission assembly further comprises a second shaft (8), one end of the first shaft (7) is a spline shaft, one end of the second shaft (8) is provided with a spline hole, and the spline shaft is inserted into the spline hole of the second shaft (8); The other end of the first shaft (7) is connected to the cutting head (6).

8. The cantilever tunneling machine with dust removal function according to claim 6, characterized in that: Two notches (203) are provided and are respectively arranged on two opposite side surfaces of the fixing seat (2); the notch (203) and the second hinge seat (202) are not located on the same side surface.

9. The cantilever tunneling machine with dust removal function according to claim 1, characterized in that: A plurality of metal strips (13) are provided on the outer side surface of the outer tube body (5), and the metal strips (13) are arranged along the axial direction of the outer tube body (5).

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