CN213898986U

CN213898986U - Tunnel reaming TBM blade disc leads

Info

Publication number: CN213898986U
Application number: CN202023187280.1U
Authority: CN
Inventors: 于庆增; 宁向可; 高翔; 秦庆华
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-08-06
Anticipated expiration: 2030-12-26

Abstract

The utility model discloses a pilot tunnel reaming TBM blade disc has solved the problem that blade disc efficiency is low in the inclined shaft construction among the prior art. The utility model comprises a central disk seat, wherein a hollow channel is arranged at the center of the central disk seat, rib plates are evenly distributed on the outer wall of the central disk seat, and the central disk seat and the rib plates form a conical hollow body; the front end surfaces of the rib plates and the central disk seat are provided with hobbing cutters. The diameter of the hollow channel is smaller than that of the pilot hole, and two adjacent rib plates are connected through a detachable supporting beam. The utility model discloses to the pilot tunnel to from the top down form expand to dig, adopt the toper to expand and dig the cutter head and carry out the successive layer excavation to the stratum around the pilot tunnel, improve the cutting and expand and dig efficiency. Toper fretwork size blade disc reduces the inside slag discharging system of TBM, improves the efficiency of slagging tap, prevents that the dregs from piling up and produce the card and pause.

Description

Tunnel reaming TBM blade disc leads

Technical Field

The utility model relates to an inclined shaft construction technical field especially indicates a pilot tunnel reaming TBM blade disc.

Background

A traditional raise boring machine method is mostly adopted in the construction of the domestic large-gradient inclined shaft. The excavation of the section of the inclined shaft with large diameter (> 7 m) is divided into three steps: 1. drilling a guide hole with the diameter of about 200 mm; 2. installing a drill rod of the raise boring machine in the guide hole, and excavating a guide hole with the diameter of about 3 meters in a mode of pulling a cutter head of the raise boring machine reversely; 3. and (4) drilling holes in the pilot tunnel in the radial direction, and excavating to a set diameter by adopting a drilling and blasting method. The main problem of the traditional raise boring machine construction method is that in the third step, the blasting operation in the long inclined shaft has larger potential safety hazard, and meanwhile, the drilling and blasting operation has large disturbance on surrounding rock and poor tunneling quality, so that the construction bottleneck link of the long and large inclined shafts is limited. The existing cutterhead is suitable for blind hole excavation and is not suitable for pilot hole expanding excavation like a shield tunneling machine cutterhead structure with the publication number of CN204703910U and a novel cutterhead of a shield tunneling machine with the publication number of CN204703911U, and the existing cutterhead has low working efficiency in inclined shaft construction, so that the cutterhead of the TBM suitable for the inclined shaft construction to the pilot hole expanding excavation is very necessary.

SUMMERY OF THE UTILITY MODEL

Not enough to among the above-mentioned background art, the utility model provides a pilot tunnel reaming TBM blade disc has solved among the prior art problem that the blade disc efficiency is low in the inclined shaft construction.

The technical scheme of the utility model is realized like this: a pilot tunnel reaming TBM cutter head comprises a central disk seat, wherein a hollow channel is arranged in the center of the central disk seat, rib plates are uniformly distributed on the outer wall of the central disk seat, and the central disk seat and the rib plates form a conical hollow body; the front end surfaces of the rib plates and the central disk seat are provided with hobbing cutters. The diameter of the hollow channel is smaller than that of the pilot hole, and two adjacent rib plates are connected through a detachable supporting beam.

The center disk seat is a polygonal cylinder, the rib plates are respectively fixed on the corresponding edges of the polygonal cylinder, slag scraping components are arranged on the side walls of the outer ends of the rib plates, auxiliary hobs are arranged on the side walls of the inner ends of the rib plates, and an over-digging hob component is arranged on at least one rib plate. The auxiliary hob is located between two adjacent rib plates, and at least one auxiliary hob is arranged between two adjacent rib plates.

The slag scraping component comprises a fixing frame, a slag chute is arranged on the outer side of the fixing frame, a slag chute rib plate is arranged in the slag chute, and an anti-collision plate is arranged on the inner side of the fixing frame. The super-excavation hobbing cutter component comprises a support fixed on a rib plate, a telescopic oil cylinder is arranged on the support, a cutter holder is fixed at the telescopic end of the telescopic oil cylinder, and a multi-blade super-excavation hobbing cutter is arranged on the cutter holder. The multi-edge overexcavation hob is a double-edge hob or a three-edge hob.

The utility model discloses to the pilot tunnel to from the top down form expand to dig, adopt the toper to expand and dig the cutter head and carry out the successive layer excavation to the stratum around the pilot tunnel, improve the cutting and expand and dig efficiency. Toper fretwork size blade disc reduces the inside slag discharging system of TBM, improves the efficiency of slagging tap, prevents that the dregs from piling up and produce the card and pause, and in addition, toper fretwork size blade disc alleviates blade disc dead weight itself, improves the hole quality and reduces the disturbance to the country rock, reduces the potential safety hazard, improves the construction security, has higher spreading value.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive work.

Fig. 1 is a schematic view of the enlarged excavation cutter head of the present invention.

Fig. 2 is a partial enlarged view of the slag scraping component of the utility model.

Fig. 3 is a view from a-a in fig. 2.

Fig. 4 is the utility model discloses overexcavation hobbing cutter part structure sketch map.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, in embodiment 1, a pilot hole reaming TBM cutterhead, which is particularly suitable for inclined shaft construction, includes a central disc seat 211, a hollow channel 212 for an installation saddle 108 to pass through is arranged in the center of the central disc seat 211, so as to form a thick-walled cylinder structure, and the diameter of the hollow channel 212 is smaller than that of the pilot hole 200, so as to ensure that a hob on the central disc seat 211 can perform comprehensive excavation on rock strata around the pilot hole. Ribs 201 are evenly distributed on the outer wall of the central disk seat 211, the ribs are connected to the central disk seat at equal angles, and the central disk seat 211 and the ribs 201 form a conical hollow-out body, so that the layer-by-layer excavation of the tunnel face can be guaranteed, and the dregs can smoothly enter the pilot tunnel. Two adjacent rib plates 201 are connected through a detachable supporting beam 205, the overall strength and stability of the tapered expanding excavation cutterhead are improved, hobbing cutters 202 are arranged on the front end faces of the rib plates 201 and the central disc seat 211, and the hobbing cutters are uniformly distributed on the rib plates 201 and the central disc seat 211, so that expanding excavation of rock strata around the pilot tunnel is guaranteed.

Further, as shown in fig. 2, the central disk seat 211 is a polygonal cylinder, the polygonal cylinder is preferably a pentagonal cylinder or a hexagonal cylinder, and the rib plates 201 are respectively fixed on corresponding edges of the polygonal cylinder, so as to ensure the overall strength of the cutter head. And the side wall of the outer end of the rib plate 201 is provided with a slag scraping component 203, and the slag scraping components are in the same orientation, so that the slag soil is scraped and conveyed conveniently. The side wall of the inner end of the rib plate 201 is provided with an auxiliary hob 206, the auxiliary hob is fixed on the side wall of the rib plate through a tool rest in an auxiliary rolling mode, and a plurality of auxiliary hobs 206 are arranged between any two small panels. And an over-excavation hob part 204 is arranged on at least one rib plate, extends out of the hob 202 to perform advanced cutting on the face, and then performs extrusion cutting on the face again by the hob, so that the cutting efficiency is improved.

As shown in fig. 3, in embodiment 1, the heading hole reaming TBM cutter head, the slag scraping component 203 includes a fixing frame 209 fixed on a rib plate by bolts, a slag chute 207 is disposed outside the fixing frame 209, and a slag chute rib plate 208 is disposed in the slag chute 207, so as to push the slag soil into the heading hole. The inner side of the fixing frame 209 is provided with an anti-collision plate 210 to prevent the rock mass from colliding with the rib plate. Preferably, as shown in fig. 4, the overexcavation hob part 204 comprises a support 204-3 fixed on the rib plate 201, the support is located at the outer end of the rib plate 201, a telescopic cylinder 204-2 is fixed on the support 204-3, a tool apron 204-4 is fixed at the telescopic end of the telescopic cylinder 204-2, a multi-blade overexcavation hob 204-1 is arranged on the tool apron 204-4, the telescopic cylinder is telescopic to drive the tool apron and the multi-blade overexcavation hob 204-1 to move back and forth, and the distance extending out of the rib plate is adjusted to adapt to different excavated rock strata. The guide hole is used for discharging slag, so that the slag discharging space is increased, and the consumption of the central hob is reduced. The periphery of the cutter head is different from that of a traditional TBM cutter head, an outer side slag scraping plate is arranged, a slag inlet is not arranged, and the purpose that the pilot tunnel is expanded and the TBM is excavated to remove slag through a slag scraping component is achieved. When the TBM is used for rock breaking and tunneling, the overexcavation hob part 204 of the conical expanded excavation cutter disc 102 extends out to advance excavate the rock stratum around the pilot tunnel, then the hob on the conical expanded excavation cutter disc 102 excavates the rock stratum around the pilot tunnel layer by layer again, and the muck generated in the excavation process enters the pilot tunnel under the action of the slag scraping part 203 of the conical expanded excavation cutter disc 102 and the gravity, so that the muck is discharged through the pilot tunnel, the inner space of the TBM is increased, and the muck discharging efficiency is improved. The other structure is the same as embodiment 1.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, 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. The utility model provides a pilot tunnel reaming TBM blade disc which characterized in that: the hollow plate comprises a central plate seat (211), wherein a hollow channel (212) is arranged in the center of the central plate seat (211), rib plates (201) are uniformly distributed on the outer wall of the central plate seat (211), and the central plate seat (211) and the rib plates (201) form a conical hollow body; the front end surfaces of the rib plates (201) and the central disk seat (211) are provided with hobbing cutters (202).

2. The pilot tunnel reaming TBM cutterhead of claim 1, wherein: the diameter of the hollow channel (212) is smaller than that of the pilot hole (200), and two adjacent rib plates (201) are connected through a detachable supporting beam (205).

3. The pilot tunnel reaming TBM cutterhead according to claim 1 or 2, characterized in that: the central disc seat (211) is a polygonal cylinder, the rib plates (201) are fixed on the corresponding edges of the polygonal cylinder respectively, slag scraping components (203) are arranged on the side walls of the outer ends of the rib plates (201), auxiliary hobs (206) are arranged on the side walls of the inner ends of the rib plates (201), and an over-digging hob component (204) is arranged on at least one rib plate.

4. The pilot tunnel reaming TBM cutterhead of claim 3, wherein: the slag scraping component (203) comprises a fixed frame (209), a slag chute (207) is arranged on the outer side of the fixed frame (209), a slag chute rib plate (208) is arranged in the slag chute (207), and an anti-collision plate (210) is arranged on the inner side of the fixed frame (209).

5. The pilot tunnel reaming TBM cutterhead of claim 4, wherein: the super-excavation hob part (204) comprises a support (204-3) fixed on the rib plate (201), a telescopic oil cylinder (204-2) is arranged on the support (204-3), a hob base (204-4) is fixed at the telescopic end of the telescopic oil cylinder (204-2), and a multi-edge super-excavation hob (204-1) is arranged on the hob base (204-4).

6. The pilot tunnel reaming TBM cutterhead of claim 5, wherein: the multi-edge overexcavation hob (204-1) is a double-edge hob or a three-edge hob.

7. The pilot tunnel reaming TBM cutter head according to any one of claims 4 to 6, characterized in that: the auxiliary hob (206) is located between two adjacent rib plates (201), and at least one auxiliary hob (206) is arranged between two adjacent rib plates (201).