CN107288651B - Push bench drill bit and push bench - Google Patents
Push bench drill bit and push bench Download PDFInfo
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- CN107288651B CN107288651B CN201710598800.1A CN201710598800A CN107288651B CN 107288651 B CN107288651 B CN 107288651B CN 201710598800 A CN201710598800 A CN 201710598800A CN 107288651 B CN107288651 B CN 107288651B
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 100
- 239000000956 alloy Substances 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 238000003466 welding Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 28
- 238000005299 abrasion Methods 0.000 description 9
- 239000011435 rock Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a push bench drill bit and a push bench, wherein the push bench drill bit comprises a circular outer shell (10), the outer shell (10) is internally provided with two first radial supporting and reinforcing plates (11) and two second radial supporting and reinforcing plates (12), a plurality of first axial hob (1) are fixed between the two first radial supporting and reinforcing plates (11), a second axial hob (8) is fixed between the two second radial supporting and reinforcing plates (12), and a pair of second inclined supporting and reinforcing plates (14) are fixed between the first inclined supporting and reinforcing plates (13) and the outer shell (10). This push bench drill bit and push bench redesign tool bit (hobbing cutter, cutter) and increase a certain amount of carbide on the tool bit, increase the tool bit resistance to wear, increase single jack-in distance, reduce the hole and bore the risk, reduce receiving well quantity, only need simple maintenance to consolidate after going out the hole, can adjust to go into the well and work, need not to return the mill and change the tool bit.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a drill bit of a push bench used in rock stratum push bench construction, and also relates to a push bench containing the drill bit.
Background
In the drilling process of the rock layer push bench, the hard alloy loss of the rock layer tool bit is slightly weathered, the tool bit is possibly damaged, the tool bit needs to be replaced once in the factory after the tool bit is averagely jacked into the rock layer push bench for about 90 meters, the cost of replacing the tool bit every time is about 51 ten thousand yuan, meanwhile, a plurality of receiving wells are required to be arranged in construction because of the short jacking distance once, so that the push bench can be smoothly discharged, and the construction period and the construction cost are greatly increased. In construction, the machine head is clamped in the hole due to overlarge abrasion of the cutter head, and the machine head can be lifted out only through large excavation or manual facing tunneling, so that construction period is delayed, and construction measure cost is increased.
Namely, in the existing urban rock layer pipe jacking construction, the common rock layer pipe jacking machine has the following defects:
1. the abrasion of the cutter head is large, the cutting capacity of the cutter head is reduced, and the single jacking distance is short.
2. The abrasion of the cutter head is large, the drill is stuck in the hole due to insufficient cutting force, and the machine head has no maintenance bin due to small mechanical size and can only be used for carrying out large excavation and lifting out of the machine head for maintenance.
3. The single jacking distance is short, a large number of receiving wells and working wells are required to be arranged, and the construction cost and the construction period are increased.
4. The abrasion of the tool bit is large, the accumulated jacking distance is short, the frequency of tool bit replacement in factory returning is high, and the construction cost and the construction period are increased.
Disclosure of Invention
In order to solve the problem that the existing push bench drill is easy to wear, the invention provides the push bench drill and the push bench, and the push bench drill and the push bench redesign the tool bit (hob and cutter) and increase a certain number of hard alloys on the tool bit, increase the wear resistance of the tool bit, increase the single jacking distance, reduce the risk of drilling a hole, reduce the number of receiving wells, and can be adjusted into the well for working only by simple maintenance and reinforcement after the hole is discharged without changing the tool bit in factory.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a push bench drill bit, including annular shell body, contain two first radial support gusset plates that set up along vertical direction and two second radial support gusset plates that set up along the horizontal direction in the shell body, be fixed with a plurality of first axial hobbing cutter between two first radial support gusset plates, be fixed with the second axial hobbing cutter between two second radial support gusset plates, the central line of second axial hobbing cutter sets up along the radial of shell body, be fixed with first diagonal support gusset plate between first radial support gusset plate and the second radial support gusset plate, be fixed with a pair of second diagonal support gusset plate between first diagonal support gusset plate and the shell body, be fixed with the third axial hobbing cutter between a pair of second diagonal support gusset plate, the central line of third axial hobbing cutter sets up along the radial of shell body.
The distance from the center line of the second axial hob to the center line of the outer shell is 20% -50% of the inner diameter of the outer shell, the distance from the center line of the third axial hob to the center line of the outer shell is 30% -60% of the inner diameter of the outer shell, and the distance from the center line of the second axial hob to the center line of the outer shell is smaller than the distance from the center line of the third axial hob to the center line of the outer shell.
And a lateral hob fixing plate are also fixed between the pair of second inclined support reinforcing plates, the position of the lateral hob corresponds to the outer shell, and the lateral hob fixing plate can reinforce the lateral hob.
The outside of two radial support gusset plates all is fixed with first annular cutter, and the position of first annular cutter corresponds with the shell body, and first annular cutter contains cutting portion and cutter main part, and this cutting portion of two adjacent first annular cutters sets up in opposite directions.
The first annular cutter is in a quadrangular prism shape, the cutting part of the first annular cutter is made of hard alloy, the cutting part of the first annular cutter is welded with the cutter body of the first annular cutter, and the first annular cutter is connected with the second inclined support reinforcing plate through bolts, inserted pins or welded.
The outside of every pair of second diagonal bracing gusset plate all is fixed with the second and encircles the cutter, and the position of second hoop cutter corresponds with the shell body, and the second hoop cutter contains cutting portion and cutter main part, and the homogeneous phase back of this cutting portion of two second hoop cutters sets up on every pair of second diagonal bracing gusset plate.
The second annular cutter is arc, and the material of the cutting part of second annular cutter is carbide, and the cutting part of second annular cutter and the cutter main part welding of second annular cutter, second annular cutter and radial support gusset plate bolted connection, bolt connection or welding.
An antiwear alloy cutter head is arranged between the two second radial support reinforcing plates, an axial cutter is fixed between the pair of second diagonal support reinforcing plates, an included angle between the first diagonal support reinforcing plate and the first radial support reinforcing plate is 45 degrees, the second diagonal support reinforcing plate is perpendicular to the first diagonal support reinforcing plate, and the pair of second diagonal support reinforcing plates are parallel to each other.
The push bench drill bit only contains a second axial hob and a third axial hob, the outside of two first radial support reinforcing plates is respectively fixed with an axial cutter, the axial cutters fixed with the first radial support reinforcing plates are all positioned on the upper part of the first radial support reinforcing plates, the left side of the push bench drill bit, the inner sides and the outer sides of two second radial support reinforcing plates are all fixed with an axial cutter, and the right side of the push bench drill bit, the outer sides of the two second radial support reinforcing plates are all fixed with two axial cutters.
A push bench, the above-mentioned push bench drill bit of a end of this push bench.
The beneficial effects of the invention are as follows:
1. the problem of single jacking length is short, returns the mill and changes the tool bit is solved, only needs professional personnel to carry out simple maintenance on site after the push bench goes out of the tunnel, can go into the well to work, saves cost and saves construction period.
2. As a certain number of tool bits and a certain number of hard alloy are added on the tool bits, the cutting force is increased, the wear resistance and the energy consumption are enhanced, and the risk that the push bench is blocked in a hole due to overlarge wear of the tool bits is reduced.
3. The single jacking length is increased, the number of receiving wells is reduced, the construction period can be effectively saved, and the cost is reduced.
4. The tool bit is arranged in two directions, and after unidirectional abrasion, the tool bit can continuously push in reverse rotation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a schematic structural view of a drill bit of a push bench according to the present invention.
Fig. 2 is a schematic view of the hob.
Figure 3 is a schematic view of a first connection of a first hoop cutter.
Figure 4 is a schematic view of a second connection of the first hoop cutter.
Figure 5 is a third connection schematic of the first hoop cutter.
Fig. 6 is a cross-sectional view taken along A-A in fig. 1.
1. A first axial hob; 2. a lateral hob; 3. a lateral hob fixing plate; 4. a first hoop cutter; 5. an axial cutter; 6. a second hoop cutter; 7. wear-resistant alloy tool bit; 8. a second axial hob; 9. a third axial hob;
10. an outer housing; 11. a first radial support gusset plate; 12. a second radial support reinforcing plate; 13. a first diagonal support gusset plate; 14. a second diagonal support gusset plate;
21. a cutting portion; 22. a cutter body.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The utility model provides a push bench drill bit, including annular shell body 10, contain two first radial support reinforcing plates 11 that set up along vertical direction and two second radial support reinforcing plates 12 that set up along the horizontal direction in the shell body 10, be fixed with a plurality of first axial hobbing cutter 1 between two first radial support reinforcing plates 11, be fixed with second axial hobbing cutter 8 between two second radial support reinforcing plates 12, the central line of second axial hobbing cutter 8 sets up along the radial of shell body 10, be fixed with first diagonal support reinforcing plate 13 between first radial support reinforcing plate 11 and the second radial support reinforcing plate 12, be fixed with a pair of second diagonal support reinforcing plate 14 between first diagonal support reinforcing plate 13 and the shell body 10, be fixed with third axial hobbing cutter 9 between a pair of second diagonal support reinforcing plate 14, the central line of third axial hobbing cutter 9 sets up along the radial of shell body 10, as shown in figure 1.
The center line of the outer shell 10 can be used as a shaft for rotation, and the first radial support reinforcing plate 11 can be arranged in a vertical direction instead of being arranged in the process of rotating along with the outer shell 10, so that the first radial support reinforcing plate 11 is arranged in the vertical direction for the convenience of understanding and describing simultaneously corresponding to fig. 1. Similarly, the second radial support reinforcing plate 12 may not be disposed in the horizontal direction during rotation with the outer case 10, and it is described that the second radial support reinforcing plate 12 is disposed in the vertical and horizontal directions for convenience of understanding and description in correspondence with fig. 1.
In this embodiment, the first radial support reinforcing plate 11, the second radial support reinforcing plate 12, the first diagonal support reinforcing plate 13 and the second diagonal support reinforcing plate 14 are each strip-shaped steel plates, and the plurality of first axial hob 1 are uniformly arranged in the vertical direction. The distance from the center line of the second axial hob 8 to the center line of the outer housing 10 is 20% -50% of the inner diameter of the outer housing 10, the distance from the center line of the third axial hob 9 to the center line of the outer housing 10 is 30% -60% of the inner diameter of the outer housing 10, and the distance from the center line of the second axial hob 8 to the center line of the outer housing 10 is smaller than the distance from the center line of the third axial hob 9 to the center line of the outer housing 10, as shown in fig. 1.
In this embodiment, two first radial support reinforcing plates 11 disposed in the vertical direction and two second radial support reinforcing plates 12 disposed in the horizontal direction divide the inside of the outer case 10 into four identical sector areas, each of which includes a first diagonal support reinforcing plate 13 and a pair of second diagonal support reinforcing plates 14 (i.e., two second diagonal support reinforcing plates 14). Four first diagonal support reinforcing plates 13 are uniformly distributed along the circumferential direction of the outer housing 10, and four pairs of second diagonal support reinforcing plates 14 are also uniformly distributed along the circumferential direction of the outer housing 10.
The second axial hob 8 and the third axial hob 9 are arranged, so that the overall abrasion resistance can be effectively improved, and the risk of sticking in a hole can be reduced. The hob comprises a first axial hob 1, a second axial hob 8, a third axial hob 9 and a lateral hob 2, all of which have the same construction. The cutter body of the hob is formed by processing high-quality steel, hard alloy is welded along the outer edge (cutter ring), the wear resistance and cutting force of the hob are ensured, the smooth hole of a machine head in the rock stratum jacking construction is ensured, and the hob is welded with the cutter head through the cutter shaft to form a whole.
In this embodiment, the push bench drill bit comprises at least one second axial hob 8 and at least one third axial hob 9, preferably the push bench drill bit comprises only one second axial hob 8 and one third axial hob 9, as shown in fig. 1. A lateral hob 2 and a lateral hob fixing plate 3 are also fixed between the pair of second diagonal support reinforcing plates 14, the position of the lateral hob 2 corresponds to the outer shell 10, and the lateral hob fixing plate 3 can reinforce the lateral hob 2.
As shown in fig. 2, the lateral hob 2 bears huge counter force in construction, in order to ensure the stability of the head of the machine, the lateral hob is reinforced by adopting a lateral hob fixing plate 3, the lateral hob fixing plate 3 is a high-quality steel plate (50 mm thick), and in order to ensure the service life of the steel plate, hard alloy is welded on the side line of the steel plate, which is in contact with the face of the palm, so that the wear resistance of the hob is improved, the service cycle is prolonged, and the construction cost is reduced.
In this embodiment, a first annular cutter 4 is fixed on the outer sides of the two second radial supporting reinforcement plates 12, the first annular cutter 4 is located corresponding to the outer casing 10, the first annular cutter 4 includes a cutting portion 21 and a cutter body 22, the cutting portions 21 of two adjacent first annular cutters 4 are disposed opposite to each other, that is, as shown in fig. 1, the directions of the cutting portions 21 of the two first annular cutters 4 on the left side are opposite to each other, and the directions of the cutting portions 21 of the two first annular cutters 4 on the right side are opposite to each other. The advantage of the opposite arrangement of the cutting portions 21 of the two first annular cutters 4 is that even if the cutter head is worn too much in the unidirectional rotation drilling process and the drill is stuck, the reverse rotation can be used for continuing jacking, so that the risk of mechanical hole sticking in construction is reduced.
Preferably, the first annular cutter 4 is in a quadrangular prism shape, the cutting part of the first annular cutter 4 is made of hard alloy, the cutting part 21 of the first annular cutter 4 is welded with the cutter main body 22 of the first annular cutter 4, and the first annular cutter 4 is in bolt connection, bolt connection or welding with the second inclined support reinforcing plate 14, as shown in fig. 3 to 5. Further preferably, the first annular cutter 4 is integrally formed with the head cutter head through welding, so that the annular diameter of the formed hole can meet the design and specification requirements.
In this embodiment, the outer sides of each pair of second diagonal support reinforcement plates 14 are fixed with a second circumferential cutter 6, the second circumferential cutter 6 is located corresponding to the outer casing 10, the second circumferential cutter 6 includes a cutting portion 21 and a cutter body 22, and the cutting portions 21 of the two second circumferential cutters 6 on each pair of second diagonal support reinforcement plates 14 are disposed on opposite sides. I.e. as shown in fig. 1, the cutting portions 21 of the two second hoop cutters 6 on each pair of second diagonal support reinforcement plates 14 are oppositely directed. The advantage of the back arrangement of the cutting portions 21 of the two second annular cutters 6 on each pair of second diagonal support reinforcing plates 14 is that even if the cutter head is worn too much in the unidirectional rotation drilling process and the drill is stuck, the cutter head can be pushed in continuously by reversing, so that the risk of mechanical hole sticking in construction is reduced.
Preferably, the second annular cutter 6 is arc-shaped, as shown in fig. 6, the material of the cutting part of the second annular cutter 6 is hard alloy, the cutting part of the second annular cutter 6 is welded with the cutter body of the second annular cutter 6, and the second annular cutter 6 is in bolt connection, bolt connection or welding with the second radial support reinforcing plate 12. The second annular cutter 6 is added, so that the number of lateral hob can be reduced, and the construction cost can be effectively reduced on the premise of ensuring the construction progress, quality and safety.
In this embodiment, an antiwear alloy cutter head 7 is disposed between two second radial support reinforcing plates 12, an axial cutter 5 is fixed between a pair of second diagonal support reinforcing plates 14, an included angle between a first diagonal support reinforcing plate 13 and a first radial support reinforcing plate 11 is 45 °, the second diagonal support reinforcing plates 14 are perpendicular to the first diagonal support reinforcing plates 13, and a pair of second diagonal support reinforcing plates 14 are parallel to each other.
The cutter body of the wear-resistant alloy cutter head 7 is formed by processing high-quality steel, and hard alloy is welded along the outer edge (cutter ring), so that the wear resistance and cutting force of the hob can be ensured, the smooth hole tapping of the machine head in the rock stratum jacking construction is ensured, and the wear-resistant alloy cutter head 7 is welded with the cutter head to form a whole.
The cutter includes first annular cutter 4, axial cutter 5, second annular cutter 6, and the cutter all contains cutting portion 21 and cutter main part 22, and the cutter all adopts carbide polylith alloy concatenation to form promptly, can make things convenient for quick replacement tool bit after the hole, and especially when tool bit alloy only has partial wearing and tearing great needs to be changed, after the aircraft nose hole, only need change the alloy piece of damage, can save alloy welding time and reduce construction cost greatly.
In this embodiment, the push bench drill bit only includes a second axial hob 8 and a third axial hob 9, one axial cutter 5 is fixed on the outer sides of the two first radial support reinforcing plates 11, the axial cutters 5 fixed with the first radial support reinforcing plates 11 are all located on the upper portions of the first radial support reinforcing plates 11, as shown in fig. 1, one axial cutter 5 is fixed on the inner sides and the outer sides of the two second radial support reinforcing plates 12 on the left side of the push bench drill bit, and two axial cutters 5 are fixed on the outer sides of the two second radial support reinforcing plates 12 on the right side of the push bench drill bit.
Specifically, on the left side of the push bench drill, the axial cutters 5 on the inner sides of the two second radial support reinforcing plates 12 are staggered left and right, the axial cutters 5 on the outer sides of the two second radial support reinforcing plates 12 are arranged symmetrically up and down, and the distance from the axial cutters 5 on the inner sides of the two second radial support reinforcing plates 12 to the central line of the outer shell 10 is smaller than the distance from the axial cutters 5 on the outer sides of the two second radial support reinforcing plates 12 to the central line of the outer shell 10. On the right side of the push bench drill bit, four axial cutters 5 outside two second radial support reinforcing plates 12 are symmetrically arranged up and down, and a second axial hob 8 is located between the four axial cutters 5, as shown in fig. 1. In addition, the connection methods not described in detail in the present application may all adopt existing connection methods.
The push bench is provided with the push bench drill at one end.
According to the push bench, a certain amount of hard alloy is added to the design through the design of the tool bit and the tool bit, so that the overall abrasion resistance of the tool bit is improved, the abrasion of the tool bit in the jacking process is greatly reduced, the smooth hole outlet of the push bench is effectively ensured, and the drilling sticking risk is reduced; the tool bit alloy is arranged in a bidirectional way (in a reverse way), so that even if the unidirectional tool bit is worn too much and the drill is stuck, the tool bit alloy can be continuously jacked in through reverse rotation, and the risk of mechanical hole sticking in construction is reduced; the abrasion resistance of the tool bit is enhanced, the single jacking distance of the machine is increased, the construction quantity of the receiving well is reduced, and the jacking working efficiency is improved; the device is proved by practice to be capable of only carrying out simple maintenance on site after each hole outlet, and the device does not need to replace the cutter head in the factory, thereby saving construction cost and construction period and improving drilling speed in rock stratum.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (5)
1. The pipe pushing machine drill bit is characterized by comprising a circular outer shell (10), wherein the outer shell (10) is internally provided with two first radial supporting and reinforcing plates (11) which are arranged along the vertical direction and two second radial supporting and reinforcing plates (12) which are arranged along the horizontal direction, a plurality of first axial hob (1) are fixed between the two first radial supporting and reinforcing plates (11), a second axial hob (8) is fixed between the two second radial supporting and reinforcing plates (12), the central line of the second axial hob (8) is arranged along the radial direction of the outer shell (10), a first inclined supporting and reinforcing plate (13) is fixed between the first radial supporting and reinforcing plates (11) and the second radial supporting and reinforcing plates (12), a pair of second inclined supporting and reinforcing plates (14) are fixed between the first inclined supporting and reinforcing plates (13) and the outer shell (10), a third axial hob (9) is fixed between the pair of second inclined supporting and reinforcing plates (14), and the central line of the third axial hob (9) is arranged along the radial direction of the outer shell (10);
the outer sides of each pair of second inclined support reinforcing plates (14) are fixedly provided with second annular cutters (6), the positions of the second annular cutters (6) correspond to the outer shell (10), each second annular cutter (6) comprises a cutting part and a cutter main body, and the cutting parts of the two second annular cutters (6) on each pair of second inclined support reinforcing plates (14) are arranged in a back mode;
the second annular cutter (6) is arc-shaped, the cutting part of the second annular cutter (6) is made of hard alloy, the cutting part of the second annular cutter (6) is welded with the cutter main body of the second annular cutter (6), and the second annular cutter (6) is in bolt connection, bolt connection or welding with the second radial support reinforcing plate (12);
an antiwear alloy cutter head (7) is arranged between the two second radial support reinforcing plates (12), an axial cutter (5) is fixed between a pair of second inclined support reinforcing plates (14), an included angle between the first inclined support reinforcing plates (13) and the first radial support reinforcing plates (11) is 45 degrees, the second inclined support reinforcing plates (14) are perpendicular to the first inclined support reinforcing plates (13), and the pair of second inclined support reinforcing plates (14) are parallel to each other;
the pipe pushing machine drill bit only comprises a second axial hob (8) and a third axial hob (9), wherein one axial cutter (5) is respectively fixed on the outer sides of the two first radial supporting and reinforcing plates (11), the axial cutters (5) fixed with the first radial supporting and reinforcing plates (11) are all positioned on the upper parts of the first radial supporting and reinforcing plates (11), one axial cutter (5) is fixed on the inner sides and the outer sides of the two second radial supporting and reinforcing plates (12) on the left side of the pipe pushing machine drill bit, and two axial cutters (5) are respectively fixed on the outer sides of the two second radial supporting and reinforcing plates (12) on the right side of the pipe pushing machine drill bit;
the left side of the push bench drill bit is provided with two axial cutters (5) at the inner sides of the second radial support reinforcing plates (12) which are staggered left and right, the axial cutters (5) at the outer sides of the two second radial support reinforcing plates (12) are arranged symmetrically up and down, and the distance from the axial cutters (5) at the inner sides of the two second radial support reinforcing plates (12) to the central line of the outer shell (10) is smaller than the distance from the axial cutters (5) at the outer sides of the two second radial support reinforcing plates (12) to the central line of the outer shell (10);
and on the right side of the push bench drill bit, four axial cutters (5) on the outer sides of the two second radial support reinforcing plates (12) are symmetrically arranged in pairs from top to bottom, and the second axial cutters (8) are positioned between the four axial cutters (5).
2. The push bench drill bit according to claim 1, characterized in that a lateral hob (2) and a lateral hob fixing plate (3) are further fixed between the pair of second diagonal support reinforcing plates (14), the position of the lateral hob (2) corresponds to the outer shell (10), and the lateral hob (2) can be reinforced by the lateral hob fixing plate (3).
3. The push bench drill bit according to claim 1, wherein the outer sides of the two second radial support reinforcing plates (12) are respectively fixed with a first annular cutter (4), the positions of the first annular cutters (4) correspond to the outer shell (10), the first annular cutters (4) comprise cutting parts and cutter bodies, and the cutting parts of two adjacent first annular cutters (4) are arranged in a back-to-back mode.
4. A push bench drill bit according to claim 3, characterized in that the first annular cutter (4) is in a quadrangular prism shape, the cutting part of the first annular cutter (4) is made of hard alloy, the cutting part of the first annular cutter (4) is welded with the cutter body of the first annular cutter (4), and the first annular cutter (4) is in bolted connection, inserted pin connection or welding with the second inclined support reinforcing plate (14).
5. A push bench, characterized in that one end of the push bench comprises the push bench drill according to any of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710598800.1A CN107288651B (en) | 2017-07-21 | 2017-07-21 | Push bench drill bit and push bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710598800.1A CN107288651B (en) | 2017-07-21 | 2017-07-21 | Push bench drill bit and push bench |
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| Publication Number | Publication Date |
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| CN107288651A CN107288651A (en) | 2017-10-24 |
| CN107288651B true CN107288651B (en) | 2023-06-20 |
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| CN201710598800.1A Active CN107288651B (en) | 2017-07-21 | 2017-07-21 | Push bench drill bit and push bench |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112324452A (en) * | 2019-08-05 | 2021-02-05 | 张继红 | Annular milling pipe jacking construction equipment |
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