CN216008505U

CN216008505U - Composite rock breaking cutter

Info

Publication number: CN216008505U
Application number: CN202122310961.0U
Authority: CN
Inventors: 娄磊; 吴万荣
Original assignee: Nanjing Vocational University of Industry Technology NUIT
Current assignee: Nanjing Vocational University of Industry Technology NUIT
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-03-11
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a compound broken rock cutter sets up a plurality of hobbing cutters and percussion bit on the circumferencial direction of hob dish, and the percussion bit that lies in on the hob dish on the same diametric position forms a set of broken unit that strikes, and the hobbing cutter that lies in on the hob dish on the same diametric position forms a set of hobbing cutter broken unit, strikes broken unit and hobbing cutter broken unit and all sets up a plurality of groups and staggered arrangement on the hob dish. The hob and the percussion drill bit simultaneously act on the rock to carry out composite rock breaking, the rock mass is cut apart by several percussion rock breaking rings under certain tunneling diameter, the region of hob crushing unit effect is the hob ring, the hob ring zone rock mass is the face empty rock mass, and the inside and outside both sides of hob ring are the face empty damage zone, and this has greatly reduced the intensity of hob ring rock mass, is favorable to the hob to break the rock, reduces hob wearing and tearing, has improved tunneling efficiency.

Description

Composite rock breaking cutter

The technical field is as follows:

the utility model relates to a compound broken rock cutter.

Background art:

the full-face rock tunnel boring machine has low efficiency when large-diameter hard rock operation is carried out, the speed difference between the central hob and the edge hob is large, the edge hob is seriously abraded due to the large speed difference, and the boring cutter is frequently replaced when needed, so that the boring efficiency of the boring machine is low, and the boring cost is high. When a hard rock heading machine with the diameter of 9.5m is adopted to work in the existing tunnel with the geological hard granite stratum, the cutter at the edge of a cutter head is seriously worn, the cutter needs to be replaced once when the average footage is 2.8m, the heading efficiency is low, the consumption of the cutter accounts for about 40 percent of the manufacturing cost of the whole heading machine, and the price is high.

The method for improving the cutterhead locally can improve the geological adaptability and the tunneling efficiency of tunneling equipment, but the speed difference between the central hob and the edge hob is not fundamentally eliminated, so that the edge hob still wears seriously during the large-diameter hard rock tunneling operation. In order to reduce the abrasion loss of the edge hob during the large-diameter hard rock tunneling operation, a composite rock breaking cutter is provided on the basis of the current tunneling technology so as to improve the large-diameter hard rock tunneling operation efficiency and reduce the abrasion loss of the edge hob.

The invention content is as follows:

the utility model relates to a solve the problem that above-mentioned prior art exists and provide a compound broken rock cutter.

The utility model discloses the technical scheme who adopts has:

the utility model provides a compound broken rock cutter, includes hobbing cutter, percussion bit and hobbing cutter dish, sets up a plurality of hobbing cutters and percussion bit on the circumferencial direction of hobbing cutter dish, and the percussion bit that lies in on the same diameter position on the hobbing cutter dish forms a set of broken unit of impact, and the hobbing cutter that lies in on the same diameter position on the hobbing cutter dish forms a set of hobbing cutter broken unit, and broken unit of impact and hobbing cutter all sets up a plurality of groups and staggered arrangement on the hobbing cutter dish.

Furthermore, one impact drill bit is driven by one rock drill which is fixed on the hobbing cutter disc, and all the rock drills synchronously move, so that the impact drill bit realizes synchronous impact in the axial direction of the hobbing cutter disc.

Further, the hob head includes cutter head body and protection casing, the positive terminal surface of cutter head body is all arranged in to hobbing cutter and percussion bit, and the protection casing is fixed on the cutter head body reverse end face, and the inboard that just is located the protection casing on the cutter head body reverse end face is equipped with the solid fixed ring of a plurality of coaxial arrangements, installs the rock drill on solid fixed ring's outer wall.

Furthermore, the outer wall surface of the fixing ring is provided with an adjusting slide rail, the adjusting slide rail is connected with a slide plate in a sliding manner, and the rock drill is fixed on the slide plate.

Furthermore, a plurality of slag blowing holes are arranged on the circumferential wall of the head part of the impact drill bit.

Furthermore, a plurality of percussion drill teeth are embedded on the end surface of the head of the percussion drill bit.

The utility model discloses following beneficial effect has:

the hob and the percussion drill bit simultaneously act on the rock to carry out composite rock breaking, the rock mass is cut apart by several percussion rock breaking rings under certain tunneling diameter, the region of hob crushing unit effect is the hob ring, the hob ring zone rock mass is the face empty rock mass, and the inside and outside both sides of hob ring are the face empty damage zone, and this has greatly reduced the intensity of hob ring rock mass, is favorable to the hob to break the rock, reduces hob wearing and tearing, has improved tunneling efficiency.

Description of the drawings:

fig. 1 is a structural diagram of the hob and the percussion bit of the present invention on a hob head.

Fig. 2 is a three-dimensional structure diagram of the reverse side of the hobbing cutter of the utility model.

Fig. 3 is a block diagram of the rock drilling machine mounted on a retainer ring.

Fig. 4 is a block diagram of the rock drilling machine.

Fig. 5 is a structural view of the percussion drill according to the present invention.

Fig. 6 is a schematic view of a roller cutter simultaneously acting on rock with a percussion drill bit.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

As fig. 1, the utility model relates to a compound rock breaking cutter, including hobbing cutter 1, percussion bit 2 and hobbing cutter dish 3, set up a plurality of hobbing cutters 1 and percussion bit 2 on the circumferencial direction of hobbing cutter dish 3, the percussion bit 2 that lies in on the same diametric (al) position on the hobbing cutter dish 3 forms a set of broken unit of striking, and hobbing cutter 1 that lies in on the hobbing cutter dish on the same diametric (al) position forms a set of hobbing cutter broken unit, and broken unit of striking and hobbing cutter broken unit all set up a plurality of groups and staggered arrangement on the hobbing cutter dish.

The utility model provides a percussion bit 2 passes through the drive of rock drill 4, and rock drill 4 is fixed on hobbing

cutter dish

3, 4 synchronous motion of all rock drills for percussion bit 2 realizes synchronous impact at hobbing cutter dish axial direction.

As shown in fig. 2, 3 and 4, the hob head 3 includes a cutter head body 31 and a shield 32, the hob 1 and the percussion bit 2 are both disposed on the front end surface of the cutter head body 31, the shield 32 is fixed on the reverse end surface of the cutter head body 31, a plurality of coaxially disposed fixing rings 33 are disposed on the reverse end surface of the cutter head body 31 and on the inner side of the shield 32, and the rock drilling machine 4 is mounted on the outer wall surface of the fixing rings 33.

In order to conveniently adjust the axial position of the rock drilling machine 4 on the hobbing cutter head 3, an adjusting slide rail 34 is arranged on the outer wall surface of the fixing ring 33, a slide plate 35 is connected on the adjusting slide rail 34 in a sliding mode, the rock drilling machine 4 is fixed on the slide plate 35, and the slide plate 35 is locked through screws after the position of the slide plate 35 is adjusted.

As shown in fig. 5, in order to increase the breaking efficiency of the percussion drill bit 2, a number of percussion drill teeth 22 are embedded in the end surface of the head of the percussion drill bit 2.

The circumferential wall of the head part of the percussion drill bit 2 is provided with a plurality of slag blowing holes 21, and the slag blowing holes 21 avoid slag accumulation on the percussion drill bit.

Hobbing cutter and percussion bit act on the rock simultaneously and carry out compound broken rock, and the rock mass is cut apart by several impact broken rock ring under certain tunnelling diameter, and the region of hobbing cutter broken cell effect is the hobbing cutter ring, and hobbing cutter ring zone rock mass is for facing empty rock mass, and the inside and outside both sides of hobbing cutter ring are facing empty damage area, and this has greatly reduced the intensity of hobbing cutter ring rock mass, is favorable to the hobbing cutter to break rock, and it is big more to face empty damage area scope, and the intensity of hobbing cutter ring zone rock mass just weakens more, is favorable to the hobbing cutter to break rock more.

As shown in fig. 6, in the rotation process of the hob disk, the hob and the impact bit simultaneously act on the rock to realize composite rock breaking, when the composite rock breaking starts, the impact bit impacts the rock 400 in the rock breaking area, and due to the installation of the impact bit on the hob disk, the impact bit, driven by the rotation torque of the hob disk, rotates with the hob disk to cut the rock in addition to impacting the broken rock, and finally forms an impact rock breaking ring K on the rock.

Under the action of cyclic impact load and ground stress, an inner side near-empty damage area and an outer side near-empty damage area are respectively formed on the inner side and the outer side of the impact rock-breaking ring. The inner side and the outer side of the hob are both the near-empty damage areas, so that the strength of the rock mass in the hob ring is weakened, when the hob digs and rolls the rock mass, the abrasion of the hob is reduced, and the digging efficiency is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a compound broken rock cutter which characterized in that: including hobbing cutter (1), percussion bit (2) and hobbing cutter dish (3), set up a plurality of hobbing cutters (1) and percussion bit (2) on the circumferencial direction of hobbing cutter dish (3), percussion bit (2) that lie in same diameter position on hobbing cutter dish (3) form a set of impact crushing unit, hobbing cutter (1) that lie in same diameter position on the hobbing cutter dish form a set of hobbing cutter crushing unit, impact crushing unit and hobbing cutter crushing unit all set up a plurality of groups and staggered arrangement on the hobbing cutter dish.

2. The composite rock breaking cutter of claim 1, wherein: an impact drill bit (2) is driven by a rock drill (4), the rock drill (4) is fixed on a hobbing cutter disc (3), and all the rock drills (4) move synchronously, so that the impact drill bit (2) realizes synchronous impact in the axial direction of the hobbing cutter disc.

3. The composite rock breaking cutter as claimed in claim 2, wherein: the hob head (3) comprises a cutter head body (31) and a protective cover (32), the hob (1) and the percussion bit (2) are arranged on the positive end face of the cutter head body (31), the protective cover (32) is fixed on the reverse end face of the cutter head body (31), a plurality of coaxially arranged fixing rings (33) are arranged on the reverse end face of the cutter head body (31) and on the inner side of the protective cover (32), and a rock drill (4) is installed on the outer wall face of the fixing rings (33).

4. The composite rock breaking cutter as claimed in claim 3, wherein: the outer wall surface of the fixing ring (33) is provided with an adjusting slide rail (34), the adjusting slide rail (34) is connected with a sliding plate (35) in a sliding mode, and the rock drilling machine (4) is fixed on the sliding plate (35).

5. The composite rock breaking cutter of claim 1, wherein: the circumferential wall of the head part of the impact drill bit (2) is provided with a plurality of slag blowing holes (21).

6. The composite rock breaking cutter of claim 1, wherein: the end surface of the head part of the impact drill bit (2) is embedded with a plurality of impact drill teeth (22).