A roller-type rock-breaking device for blind areas of tunnel boring machines

Abstract

The present invention discloses a roller-type rock-breaking device for the blind area of ​​a tunnel boring machine, which solves the technical problem that the existing large-section tunnel boring machines cannot efficiently crush and discharge hard rock blind areas. The present invention includes a roller, and a driven roller is arranged on the rear side of the roller. The roller and the driven roller are connected by a crawler transmission, and a plurality of pick assemblies are arranged on the crawler. During construction, the roller drives the crawler to rotate, and the pick assembly formed on the crawler rotates to squeeze the blind area, crushing the rock in the blind area within the pick spacing, and then the pick assembly drives the crushed rock to the rear of the roller for slag discharge, which can be used to excavate the blind area formed by the excavation of large-section tunnel boring machines such as horseshoe-shaped tunnel boring machines. The pick assembly has a small working resistance, flexible rotation performance, wear resistance and is not easy to fall off, and is not easy to generate sparks during operation, and can effectively cut hard rock. In the process of driving the pick assembly to break the rock, the drum-type structure will also drive the rock slag to be discharged outward.

Description

Technical Field

[0001] The invention relates to the technical field of tunneling mechanism of a tunneling machine, in particular to a blind area roller type rock breaking device of a tunneling machine. Background Art

[0002] Due to its structural characteristics, large-section tunnel boring machines have blind areas in tunneling, such as Figure 1 The horseshoe-shaped tunnel boring machine shown in the figure has many blind spots 1 at different locations. When tunneling soft soil or soft rock tunnels, the blind spots are squeezed and broken by the thrust of the tunnel boring machine, but the hard rock has high strength, and the thrust of the tunnel boring machine cannot effectively solve the hard rock blind spots. Therefore, it is necessary to study a rock breaking device that can solve the blind spots of large-section tunneling, so that large-section tunnel boring machines can work normally in hard rock environments.

[0003] The invention patent with the publication date of the existing application being 2013.02.13 and the application publication number being CN102926748A discloses a double-cutterhead plus double-horizontal-drum full-section tunnel boring machine, including a three-arm cutterhead, an upper cutting drum and a lower cutting drum, which are used to break rocks together. Although the cutting drum in the technical solution of the patent application can make up for the blind spots that the three-arm cutterhead cannot cut, the tunnel boring machine in the technical solution is a mobile tunnel boring machine used for tunnel excavation, and its excavation section is small and the rock breaking hardness is low, which cannot be applied to the excavation requirements of large-section tunnel boring machines, which is mainly reflected in two aspects: one is the insufficient rock breaking capacity, and the other is the insufficient slag discharge performance. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a roller-type rock breaking device for the blind area of ​​a tunnel boring machine, which solves the technical problem that existing large-section tunnel boring machines are unable to efficiently crush and discharge slag in the hard rock blind area.

[0005] The technical solution of the present invention is implemented as follows: a roller-type rock-breaking device for the blind area of ​​a tunnel boring machine, comprising a roller, a driven roller is arranged at the rear side of the roller, the roller and the driven roller are connected by a crawler transmission, and a plurality of pick assemblies are arranged on the crawler. During construction, the roller drives the crawler to rotate, and the pick assemblies formed on the crawler rotate to squeeze the blind area, crushing the rocks in the blind area within the pick spacing, and then the pick assemblies drive the crushed rocks to the rear of the roller for slag discharge, which can be used to excavate the blind area formed by large-section tunnel boring machines such as horseshoe-shaped tunnel boring machines after excavation. The pick assembly has a small working resistance, flexible rotation performance, wear resistance and is not easy to fall off, and is not easy to generate sparks during operation, and can effectively cut hard rock. In the process of driving the pick assembly to break the rock, the drum-type structure will also drive the rock slag to be discharged outward.

[0006] The pick assembly comprises a cutter seat arranged on the crawler, on which an alloy pick inclined in the excavation direction is arranged. The inclined arrangement of the alloy pick can not only efficiently break rocks, but also facilitate the discharge of debris.

[0007] The cutter seat is arc-shaped and distributed along the circumference of the drum. The alloy pick is conical. The arc-shaped cutter seat is convenient for squeezing slag and is not easily deformed by pressure. The conical alloy pick has smaller working resistance, making the crawler track rotate more flexibly.

[0008] Preferably, the angle between the tangent line at the connection between the cutter seat and the drum and the axis of the alloy pick is 60°.

[0009] The crawler includes a plurality of hinged track shoes, each track shoe is provided with a pick assembly, and the pick assembly on the crawler is arranged in a V shape, with the opening of the V shape facing the excavation direction. The pick assembly arranged in the V shape can not only subject the rock in the blind area to the longitudinal crushing force of the alloy pick when breaking the rock, but also to the lateral squeezing force, and also facilitates the slag discharge backwards.

[0010] The rollers include a left roller and a right roller, a driving mechanism is arranged between the left roller and the right roller or on both sides, and a crawler track is synchronously connected between the left roller and the right roller.

[0011] The pick assembly is arranged on the outer circumferential surfaces of the left drum and the right drum, which further enhances the rock breaking and slag removal effects.

[0012] The crawler is provided with a plurality of groups of pick assemblies arranged in a V shape, and each group of pick assemblies arranged in a V shape on the crawler forms a large V shape with the pick assemblies on the drum, so that the pick assemblies on the drum and the crawler act synchronously at the rock breaking location.

[0013] A guide groove is arranged on the inner side of the crawler belt, the driving mechanism is connected with a tensioning beam facing the driven roller, and the tensioning beam is connected with a tensioning guide roller which is in rolling cooperation with the guide groove.

[0014] The driven roller is installed at the middle position of the crawler track, and the lengths of the driven roller and the tension guide roller are both shorter than the width of the crawler track.

[0015] When the present invention is used for construction, the drum drives the crawler to rotate, and the pick assembly arranged in a V shape on the drum and crawler rotates to squeeze the blind area, crushing the rock in the blind area within the pick spacing, and then the pick assembly arranged in a V shape drives the crushed rock to the rear of the drum for slag discharge, which can be used to excavate the blind area formed by the excavation of large-section tunneling machines such as horseshoe tunneling machines. The conical alloy pick has a small working resistance, flexible rotation performance, wear resistance and is not easy to fall off. It is not easy to generate sparks during operation, and can effectively cut hard rock; the alloy pick is reasonably arranged, so that the pick assembly is more evenly stressed, cutting faster, and improving the cutting efficiency; the drum structure will also drive the rock slag to be discharged outward in the process of driving the pick to break the rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description 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 any creative work.

[0017] Figure 1 This is a schematic diagram of the excavation section of a horseshoe-shaped tunnel boring machine;

[0018] Figure 2 It is a structural schematic diagram of the present invention;

[0019] Figure 3 for Figure 2 Right view of;

[0020] Figure 4 for Figure 2 A front view of

[0021] Figure 5 is an application state diagram of the present invention;

[0022] Figure 6 for Figure 2 Installation relationship diagram of the middle pick assembly and the drum;

[0023] Among them: 1. roller, 11. left roller, 12. right roller, 2. driven roller, 3. crawler, 4. pick assembly, 41. tool holder, 42. alloy pick, 5. tensioning beam, 6. tensioning guide roller. DETAILED DESCRIPTION

[0024] 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.

[0025] A roller-type rock breaking device for blind areas of tunnel boring machines, such as Figure 2 As shown, it includes a drum 1, a driven roller 2 is arranged on the rear side of the drum 1, and the drum 1 and the driven roller 2 are connected by a crawler 3, and a plurality of pick assemblies 4 are arranged on the crawler 3.

[0026] During construction Figure 5As shown, the drum 1 drives the crawler 3 to rotate, and the pick assembly 4 formed on the crawler 3 rotates to squeeze the blind area, crushing the rock in the blind area within the pick spacing, and then the pick assembly 4 drives the crushed rock to the rear of the drum 1 for slag discharge, which can be used to excavate the blind area formed by the excavation of large-section tunneling machines such as horseshoe tunneling machines. The pick assembly 4 has a small working resistance, flexible rotation performance, wear resistance and is not easy to fall off. It is not easy to generate sparks during operation, and can effectively cut hard rock. The drum-type structure will also drive the rock slag to be discharged outward in the process of driving the pick assembly 4 to break the rock.

[0027] Specifically, Figure 6 As shown, the pick assembly 4 includes a cutter seat 41 welded on the crawler 3, and an alloy pick 42 inclined toward the excavation direction is welded on the cutter seat 41. The inclined arrangement of the alloy pick 42 can not only efficiently break rocks, but also facilitate the discharge of debris.

[0028] The blade holder 41 is arc-shaped and distributed along the circumference of the drum 1, and the alloy pick 42 is conical. The arc-shaped blade holder 41 is convenient for squeezing the slag and is not easily deformed by pressure, and the conical alloy pick 42 has a smaller working resistance, making the crawler 3 more flexible to rotate. Preferably, the angle between the tangent of the connection between the blade holder 41 and the drum 1 and the axis of the alloy pick 42 is 60°.

[0029] like Figure 2 and Figure 4 As shown, the crawler 3 includes a plurality of hinged crawler plates, each of which is welded with a pick assembly 4. The pick assembly 4 on the crawler 3 is arranged in a V shape, and the opening of the V shape faces the excavation direction. The V-shaped pick assembly 4 can not only subject the rock in the blind area to the longitudinal crushing force of the alloy pick 42 during rock breaking, but also to the lateral squeezing force, and is also convenient for rearward slag discharge.

[0030] The drum 1 includes a left drum 11 and a right drum 12, a driving mechanism is arranged between the left drum 11 and the right drum 12 or on both sides, and the crawler 3 is synchronously connected between the left drum 11 and the right drum 12. The pick assembly 4 is arranged on the outer circumference of the left drum 11 and the right drum 12, which further enhances the rock breaking and slag discharge effect.

[0031] The crawler 3 is provided with a plurality of groups of pick assemblies 4 arranged in a V shape, and each group of pick assemblies 4 arranged in a V shape on the crawler 3 forms a large V shape with the pick assemblies 4 on the drum 1, so that the drum 1 and the pick assemblies 4 on the crawler 3 act synchronously at the rock breaking location.

[0032] Furthermore, if Figure 3As shown, a guide groove is provided on the inner side of the crawler 3, and the driving mechanism is connected to a tensioning beam 5 facing the driven roller 2, and the tensioning beam 5 is connected to a tensioning guide roller 6 that rolls with the guide groove. The driven roller 2 is assembled in the middle of the crawler 3, and the lengths of the driven roller 2 and the tensioning guide roller 6 are both shorter than the width of the crawler 3.

[0033] like Figure 1 As shown, the black part is the blind area between the cutter discs, and the present invention can be arranged at a position corresponding to any blind area.

[0034] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller-type rock-breaking device for a blind area of ​​a tunnel boring machine, comprising a roller (1), characterized in that: A driven roller (2) is arranged at the rear side of the drum (1); the drum (1) and the driven roller (2) are connected to each other via a crawler belt (3); and a plurality of pick assemblies (4) are arranged on the crawler belt (3); The pick assembly (4) comprises a cutter seat (41) arranged on the crawler (3), and the cutter seat (41) is provided with an alloy pick (42) inclined in the excavation direction; The cutter seat (41) is arc-shaped and distributed along the circumference of the drum (1), and the alloy pick (42) is conical; The angle between the tangent line at the connection between the cutter seat (41) and the roller (1) and the axis of the alloy pick (42) is 60°; The roller (1) comprises a left roller (11) and a right roller (12); a driving mechanism is arranged between the left roller (11) and the right roller (12) or on both sides thereof; and a crawler belt (3) is synchronously connected between the left roller (11) and the right roller (12); The pick assembly (4) is provided on the outer circumferential surfaces of the left drum (11) and the right drum (12); The crawler (3) is provided with a plurality of groups of pick assemblies (4) arranged in a V-shape, the opening of the V-shape facing the excavation direction, and the groups of pick assemblies (4) arranged in a V-shape on the crawler (3) and the pick assemblies (4) on the drum (1) form a large V-shape; The blind area roller-type rock breaking device for a roadheader is used for excavating a blind area formed after a large-section roadheader excavates. The roller (1) drives the crawler (3) to rotate, and the pick assembly (4) arranged in a V shape on the roller (1) and crawler (3) rotates to squeeze the blind area, thereby crushing the rock in the blind area within the spacing of the alloy pick (42), and then the pick assembly (4) arranged in the V shape drives the crushed rock to the rear of the roller (1) for slag discharge.

2. The blind area drum rock breaking device of a tunnel boring machine according to claim 1, characterized in that: The crawler track (3) comprises a plurality of track shoes that are hingedly connected to each other, each track shoe is provided with a pick assembly (4), and the pick assembly (4) on the crawler track (3) is arranged in a V shape.

3. The blind area drum rock breaking device of a tunnel boring machine according to claim 1 or 2, characterized in that: A guide groove is provided on the inner side of the crawler (3); a tensioning beam (5) facing the driven roller (2) is connected between the left roller (11) and the right roller (12); and the tensioning beam (5) is connected to a tensioning guide roller (6) that rolls with the guide groove.

4. The blind area drum rock breaking device of a tunnel boring machine according to claim 3, characterized in that: The driven roller (2) is mounted in the middle of the crawler track (3); the lengths of the driven roller (2) and the tensioning guide roller (6) are both shorter than the width of the crawler track (3).

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