CN212296282U

CN212296282U - Milling drill bit for trenchless treatment buried drill

Info

Publication number: CN212296282U
Application number: CN202020798686.4U
Authority: CN
Inventors: 于峰; 陈国强; 徐松; 魏华超; 姜桂花; 陈扬
Original assignee: Wuxi Drillto Trenchless Co ltd
Current assignee: Wuxi Drillto Trenchless Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-01-05
Anticipated expiration: 2030-05-14

Abstract

The utility model relates to a milling drill bit for trenchless treatment buried drilling, which comprises a milling body, a revolving body, an inclined palm seat and a duck palm plate; the sleeve milling body comprises a drill rod sleeve and a rotary sleeve, the drill rod sleeve is connected with the rotary sleeve through a connecting welding block, the drill rod sleeve is sleeved on a drill rod, the rotary body is positioned in the rotary sleeve, the inclined palm seat is detachably connected with one end of the rotary body, a central water channel is arranged in the rotary body, a central water channel and a water spraying hole are arranged in the inclined palm seat, a nozzle is arranged in the water spraying hole, and the central water channel, the central water channel and the water spraying hole are sequentially communicated; the duck palm plate is detachably connected with the inclined palm seat. The utility model relates to a non-excavation is handled cover milling drill bit for burial, can drill the hole forward along the drilling rod behind the dead drill bit of card, until reacing near by the dead drill bit of card to locate the water spray at this position, thereby the rescue is by the dead drill bit of card, guarantees that the probing operation continues to go on.

Description

Milling drill bit for trenchless treatment buried drill

Technical Field

The utility model relates to a non-excavation construction field, concretely relates to non-excavation is handled and is buried brill and use cover milling bit.

Background

The non-excavation technology is a construction technology which utilizes technical means such as rock-soil drilling, directional measurement and control and the like to pass through rivers, lakes, important traffic main lines and important buildings under the condition that grooves are not dug on the ground surface and the damage to stratum structures is extremely small, so as to realize the detection, the laying, the repair and the replacement of public pipelines such as water supply, gas, natural gas, sewage, telecommunication cables and the like.

In the actual drilling operation, the drill rod and the drill bit at the front part of the drill rod are easy to be blocked. At the moment, a feasible method is to inject slurry into the soil layer at the position of the stuck drill rod to soften the soil layer and reduce the friction force.

Although can realize the slip casting through spouting mud in the drill bit, at the drilling in-process, pressure and frictional force that the drilling rod received are all great, and through drill bit spun mud, can't rescue the dead drilling rod of card in the back, the dead phenomenon of card still can't be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the milling bit for the trenchless treatment buried drill can drill forwards along a drill rod behind a blocked drill bit until the drill rod reaches the vicinity of the blocked drill rod or drill bit, so that the blocked drill rod or drill bit is relieved, and the drilling operation is ensured to continue.

In order to achieve the above object, the present invention provides the following technical solutions:

a milling drill bit for trenchless treatment buried drilling comprises a milling body, a revolving body, an inclined palm seat and a duck palm plate; the sleeve milling body comprises a drill rod sleeve and a rotary sleeve, the drill rod sleeve is connected with the rotary sleeve through a connecting welding block, the drill rod sleeve is sleeved on a drill rod, the rotary body is positioned in the rotary sleeve, the inclined palm seat is detachably connected with one end of the rotary body, a central water channel is arranged in the rotary body, a central water channel and a water spraying hole are arranged in the inclined palm seat, a nozzle is arranged in the water spraying hole, and the central water channel, the central water channel and the water spraying hole are sequentially communicated; the duck palm plate is detachably connected with the inclined palm seat.

Furthermore, the central axis of the drill rod sleeve is parallel to the central axis of the rotary sleeve, and the outer diameter of the rotary body is in transition fit with the inner diameter of the rotary sleeve.

Furthermore, the external diameter of the oblique palm seat is larger than the internal diameter of the rotary sleeve, a fixed ring is further welded on the rotary body, and the fixed ring is specifically positioned at one end, far away from the oblique palm seat, of the rotary sleeve.

Furthermore, the central waterway is coaxial with the revolving body, the central water tank is coaxial with the inclined palm seat, and an included angle between the water spray hole and the duck palm plate is an acute angle.

Further, the nozzle is in threaded connection with the inner wall of the water spraying hole, and the nozzle faces to the end of the duck foot plate.

The utility model has the advantages that: the utility model provides a non-excavation handles cover milling drill bit for bur, through the cooperation use of cover milling body, the solid of revolution, oblique palm seat, duck's palm board and nozzle, the cover milling drill bit can be followed the drilling rod that is dead drill bit back and is gone forward, and the drilling is gone into simultaneously in the mud of spouting until reaching by dead drilling rod of card or near the drill bit, makes the stereoplasm soil layer of the dead drill bit of card meet water and soften, and mud can reduce friction simultaneously, and the drilling rod sleeve can scrape off the peripheral silt or the coating of a week of drilling rod, thereby salvage by dead drilling rod or drill bit of card, guarantee to creep into the operation and continue to go on.

Drawings

Fig. 1 is the utility model relates to a non-excavation is handled and is buried brill with overall structure cross-sectional view of cover milling drill bit.

Fig. 2 is the utility model relates to a non-excavation is handled and is buried brill and mill structure section view of body with cover of milling drill bit.

Fig. 3 is the utility model discloses a non-excavation is handled and is buried brill with cover milling drill bit and bury in drilling by the cross-sectional view of dead drilling rod of card and drill bit cooperation state.

In the figure: 1. milling a body; 11. a drill rod sleeve; 12. connecting the welding blocks; 13. rotating the sleeve; 2. a revolving body; 21. a central waterway; 3. a stationary ring; 4. an inclined palm seat; 41. a central water tank; 42. a water spray hole; 5. a duck palm plate; 6. and (4) a nozzle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 to 3, a milling bit for trenchless treatment buried drilling comprises a milling body 1, a revolving body 2, an inclined palm seat 4 and a duck palm plate 5; the sleeve milling body 1 comprises a drill rod sleeve 11 and a rotary sleeve 13, the drill rod sleeve 11 is connected with the rotary sleeve 13 through a connecting welding block 12, the drill rod sleeve 11 is sleeved on a drill rod, the rotary body 2 is positioned in the rotary sleeve 13, the inclined palm seat 4 is detachably connected with one end of the rotary body 2, a central water channel 21 is arranged in the rotary body 2, a central water channel 41 and a water spraying hole 42 are arranged in the inclined palm seat 4, a nozzle 6 is arranged in the water spraying hole 42, and the central water channel 21, the central water channel 41 and the water spraying hole 42 are sequentially communicated, so that water spraying can be realized; duck's palm board 4 is connected with oblique palm seat 4 is detachable, and duck's palm board 4 is used for the creeping into of cover milling drill bit.

The central axis of the drill rod sleeve 11 is parallel to the central axis of the rotary sleeve 13, the outer diameter of the rotary body 2 is in transition fit with the inner diameter of the rotary sleeve 13, and the rotary body 2 can rotate in the rotary sleeve 13.

The external diameter of the oblique palm seat 4 is greater than the internal diameter of the rotary sleeve 13, the solid of revolution 2 is gone up still to be welded and is had the retainer plate 3, the retainer plate 3 specifically is located the one end that the rotary sleeve 13 kept away from oblique palm seat 4, the relative position that the retainer plate 3 was used for retraining solid of revolution 2 and rotary sleeve 13 can promote the shell and mill body 1 simultaneously and move along the drilling rod.

The central water channel 21 and the revolving body 2 are coaxially arranged, the central water channel 41 and the inclined palm seat 4 are coaxially arranged, and the included angle between the water spray hole 42 and the duck palm plate 5 is an acute angle.

The nozzle 6 is in threaded connection with the inner wall of the water spraying hole 42, and the nozzle 6 faces the end of the duck foot plate 5, so that the water spraying direction is in front of the duck foot plate 5.

The utility model discloses a theory of operation does: when a drill rod or a drill bit is stuck, a sleeve milling drill bit is used, specifically, a drill rod sleeve 11 of a sleeve milling body 1 is sleeved on the stuck drill rod or the drill rod behind the drill bit, then a drilling machine drives a rotary body 2 of the sleeve milling drill bit to rotate relative to a rotary sleeve 13 of the sleeve milling body 1, so as to drive an inclined palm seat 4 and a duck palm plate 5 to rotate together, and the parallel drilling along the original drilling path is realized by matching with the feeding action; high-pressure slurry supplied from a pressure pump is finally sprayed into a soil layer through a nozzle 6 through a central water path 21, a central water tank 41 and a water spraying hole 42, the slurry is continuously injected until a soil layer around a blocked drill rod or drill bit is softened, the drill rod sleeve 11 slides forwards along the drill rod under the lubrication action of the loose slurry and the slurry in the soil layer, and silt or the soil layer around the drill rod can be scraped and cleaned, so that the drill rod is separated from the blocked state, the drill rod can be continuously driven to rotate at the moment, and the drilling operation can be continuously carried out.

The above examples are provided for further illustration of the present invention, but do not limit the present invention to these specific embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. The utility model provides a non-excavation is handled cover milling drill bit for buried drill which characterized in that: comprises a milling body (1), a revolving body (2), an inclined palm seat (4) and a duck palm plate (5); the sleeve milling body (1) comprises a drill rod sleeve (11) and a rotary sleeve (13), the drill rod sleeve (11) is connected with the rotary sleeve (13) through a connecting welding block (12), the drill rod sleeve (11) is sleeved on a drill rod, the rotary body (2) is positioned in the rotary sleeve (13), the inclined palm seat (4) is detachably connected with one end of the rotary body (2), a central water channel (21) is arranged in the rotary body (2), a central water channel (41) and a water spraying hole (42) are arranged in the inclined palm seat (4), a nozzle (6) is arranged in the water spraying hole (42), and the central water channel (21), the central water channel (41) and the water spraying hole (42) are sequentially communicated; the duck palm plate (5) is detachably connected with the inclined palm seat (4).

2. The casing milling drill bit for trenchless treatment of buried drill according to claim 1, wherein: the central axis of the drill rod sleeve (11) is parallel to the central axial direction of the rotary sleeve (13), and the outer diameter of the rotary body (2) is in transition fit with the inner diameter of the rotary sleeve (13).

3. The casing milling drill bit for trenchless treatment of buried drill according to claim 2, wherein: the outer diameter of the oblique palm seat (4) is larger than the inner diameter of the rotary sleeve (13), a fixing ring (3) is further welded on the rotary body (2), and the fixing ring (3) is specifically located at one end, far away from the oblique palm seat (4), of the rotary sleeve (13).

4. The casing milling drill bit for trenchless treatment of buried drill according to claim 3, wherein: the central waterway (21) is coaxial with the revolving body (2), the central water tank (41) is coaxial with the inclined palm seat (4), and an included angle between the water spray hole (42) and the duck palm plate (5) is an acute angle.

5. The casing milling drill bit for trenchless treatment of buried drill according to claim 4, wherein: the nozzle (6) is in threaded connection with the inner wall of the water spraying hole (42), and the nozzle (6) faces the end of the duck foot plate (5).