CN214118086U - Novel rotary digging hob - Google Patents

Abstract

The utility model belongs to the technical field of the drill bit, concretely relates to novel rotary digging hob, including rotary digging hob and installation knife box; the rotary digging hob comprises a cutter shaft, a lower gland sealing ring, a lower gland, a metal end face sealing system, an integral cutter ring, a tapered roller bearing, an upper gland sealing ring, an upper gland and a fixing ring; the mounting tool box comprises two tool box main bodies, a pressing plate, two cutter shaft locking screws and two gland locking screws, the cutter shaft locking screws penetrate through two ends of the cutter shaft to fix the cutter shaft on the tool box main body, and two ends of the pressing plate are fixed on the tool box main body through the gland locking screws to tightly press the upper parts of two ends of the cutter shaft. According to the structure, the rock mass is crushed by extruding and shearing the rock mass through the hob, so that the rotary cutter is suitable for various rock strata, and the construction efficiency can be greatly improved by combining rotary drilling with the roller bit and the hard alloy cutting tooth.

Description

Novel rotary digging hob

Technical Field

The utility model belongs to the technical field of pile foundation engineering, concretely relates to novel dig hobbing cutter soon.

Background

With the recent economic soaring and vigorous infrastructure construction in China, the domestic rotary drilling rig industry enters a rapid development stage, and compared with the traditional pile machine equipment, the rotary drilling rig has the characteristics of high technological content, energy conservation, environmental protection, high construction efficiency and the like. At present, the rotary drilling rig occupies a half-wall Jiangshan of a domestic large-aperture concrete cast-in-place pile. The number of rotary drilling rigs in China is developed from 200 in 2000 to over ten thousands of rotary drilling rigs in the past, and the construction area is also expanded from the initial northern area to the southwest and south China; the geologic structure is transformed from the prior fourth series of plastic, loose conventional geology to the current rock-entering drilling. The working efficiency of rock drilling in hard rock is greatly reduced, the construction period is prolonged, and the engineering cost is increased. Therefore, a new tunneling tool is needed to assist the existing rotary excavating construction method, and a new tunneling technology is needed to improve the working efficiency.

The existing rotary excavating construction method mainly adopts a rotary excavating roller bit and a hard alloy cutting tooth to drill, is single in use and slow in footage, the rotary excavating roller bit is suitable for rock formations with the uniaxial natural compressive strength of more than 60MPa, the hard alloy cutting tooth is suitable for rock formations with the uniaxial natural compressive strength of less than 60MPa, and the rotary excavating construction method is wide in territory in China, complex in hydrology and rock-soil structure and unrealistic in replacement of a drilling tool as soon as geological conditions change.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel dig hobbing cutter soon to solve the problem that exists among the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel dig hobbing cutter soon which characterized in that: the device comprises a rotary digging hob and a mounting hob box;

the rotary digging hob comprises a cutter shaft, a lower gland sealing ring, a lower gland, a metal end face sealing system, an integral cutter ring, a tapered roller bearing, an upper gland sealing ring, an upper gland and a fixing ring; the inner ring of the tapered roller bearing is fixed with the cutter shaft, the outer ring of the tapered roller bearing is fixed with the integral cutter ring, the upper gland and the lower gland are respectively fixed on two sides of the integral cutter ring, the metal end face sealing systems are respectively arranged between the upper gland and the integral cutter ring, and the upper gland sealing ring and the lower gland sealing ring are respectively arranged between the upper gland and the tapered roller bearing;

the mounting tool box comprises two tool box main bodies, a pressing plate, two cutter shaft locking screws and two gland locking screws, the cutter shaft locking screws penetrate through two ends of the cutter shaft to fix the cutter shaft on the tool box main body, and two ends of the pressing plate are fixed on the tool box main body through the gland locking screws to tightly press the upper parts of two ends of the cutter shaft.

Compared with the prior art, the utility model, its beneficial effect is: according to the structure, the rock mass is crushed by extruding and shearing the rock mass through the hob, so that the rotary cutter is suitable for various rock strata, and the construction efficiency can be greatly improved by combining rotary drilling with the roller bit and the hard alloy cutting tooth.

Drawings

FIG. 1a is a side view of the rotary cutting hob and a hob box assembly;

FIG. 1b is a front view of the rotary excavating hob and a hob box assembly;

FIG. 1c is a top view of the rotary excavating hob and the hob box assembly;

fig. 2a is a sectional view of a rotary cutting hob in the present invention;

fig. 2b is a front view of the rotary cutting hob in the present invention;

fig. 3a is a cross-sectional view of the knife box of the present invention;

fig. 3b is a front view of the middle knife box of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 a-3 b, a novel rotary digging hob includes a rotary digging hob 1 and a mounting hob box 2;

the rotary digging hob comprises a cutter shaft 1-1, a lower gland sealing ring 1-2, a lower gland 1-3, a metal end face sealing system 1-4, an integral cutter ring 1-5, a tapered roller bearing 1-6, an upper gland sealing ring 1-7, an upper gland 1-8 and a fixing ring 1-9; the inner ring of the tapered roller bearing is fixed with the cutter shaft, the outer ring of the tapered roller bearing is fixed with the integral cutter ring, the integral cutter ring is good in plasticity and space-saving, the cutter ring is in gradient hardness, the hardness of the cutting edge part is high, the wear resistance is good, the service life is long, the hardness of the cutter body part is low, the toughness is good, and the shock resistance is good. The tapered roller bearing is used, standard universal parts are adopted, the cost is low, safety and reliability are realized, axial and radial loads are effectively borne, and large-scale rapid production is facilitated. The upper gland and the lower gland are respectively fixed on two sides of the integral cutter ring, and the metal end face sealing systems are respectively arranged between the upper gland and the integral cutter ring and between the lower gland and the integral cutter ring. An upper gland sealing ring and a lower gland sealing ring are respectively arranged between the upper gland and the tapered roller bearing; the mounting knife box comprises two knife box main bodies 2-1, a pressing plate 2-2, knife shaft locking screws 2-3 and gland locking screws 2-4, the knife box main bodies penetrate through two ends of a knife shaft to fix the knife shaft on the knife box main bodies, and two ends of the pressing plate are fixed on the knife box main bodies through the gland locking screws to tightly press the upper parts of the two ends of the knife shaft. The cutter body main part becomes the hexahedron, and shock resistance is strong, can effectively resist the impact of detritus, protects the hobbing cutter, prevents that the wall of a well is bumped to the sword box. The hobbing cutter is fixed by two stages of the hobbing cutter box, so that the hobbing cutter can be effectively prevented from loosening.

The rotary digging hob is that under the thrust action, the cutter ring is pressed into the rock mass, and the rolling force enables the cutter ring to roll the rock mass. The rock mass is crushed by the extrusion and shearing of the hob on the rock mass, so that the rotary cutter adapts to various rock strata, and the construction efficiency can be greatly improved by combining rotary drilling with the rotary drill bit and the hard alloy cutting tooth.

Description of the assembly process:

firstly, assembling a rotary drilling hob:

1. cleaning all workpieces;

2. placing the lower gland 1-3 on a cross beam of an induction heater to heat to 80 ℃;

3. the big head end of the cutter shaft 1-1 is vertically placed, protective gloves are worn, the lower gland covers 1-3 at the flat ends of two hands are stably placed at the lower end of the cutter shaft, and the lower gland covers are cooled to room temperature;

4. installing a lower gland sealing ring 1-2;

5. putting the inner sleeves 1 to 6 of the tapered roller bearings on a cross beam of an induction heater and heating to 100 ℃; the protective gloves are worn, and the flat ends of the two hands are stably placed at the lower end of the cutter shaft;

6. sleeving two sets of tapered roller bearings 1-6 externally, and pressing the tapered roller bearings into the integral cutter rings 1-5;

7. installing a lower metal end face sealing system 1-4;

8. sleeving the integral cutter ring 1-5 into the cutter shaft 1-1;

9. the inner sleeves of the tapered roller bearings 1-6 are placed on a cross beam of an induction heater and heated to 100 ℃; wearing protective gloves, placing the flat ends 1-3 of the two hands on the upper end of the cutter shaft stably, and cooling at room temperature;

10. installing gland sealing rings 1-7;

11. installing a metal end face sealing system 1-4;

12. and (3) rotating the upper gland 1-8 anticlockwise along the threads of the cutter shaft 1-1, testing the starting torque of the cutter ring when the cutter ring is in place, and stopping when the torque is in place.

13. Mounting a fixing ring 1-9, and spot-welding the fixing ring and an upper gland 1-8 together;

14. and (5) injecting oil, plugging the oil injection hole, and finishing the assembly of the rotary drilling cutter.

And secondly, welding the cutter box main body to the specified slot of the rotary drilling cylinder.

And thirdly, mounting the rotary drilling hob into a hob box, and finishing all work.

It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (2)

1. The utility model provides a novel dig hobbing cutter soon which characterized in that: the device comprises a rotary digging hob and a mounting hob box;

the rotary digging hob comprises a cutter shaft, a lower gland sealing ring, a lower gland, a metal end face sealing system, an integral cutter ring, a tapered roller bearing, an upper gland sealing ring, an upper gland and a fixing ring; the inner ring of the tapered roller bearing is fixed with the cutter shaft, the outer ring of the tapered roller bearing is fixed with the integral cutter ring, the upper gland and the lower gland are respectively fixed on two sides of the integral cutter ring, the metal end face sealing systems are respectively arranged between the upper gland and the integral cutter ring, and the upper gland sealing ring and the lower gland sealing ring are respectively arranged between the upper gland and the tapered roller bearing;

the mounting tool box comprises two tool box main bodies, a pressing plate, two cutter shaft locking screws and two gland locking screws, the cutter shaft locking screws penetrate through two ends of the cutter shaft to fix the cutter shaft on the tool box main body, and two ends of the pressing plate are fixed on the tool box main body through the gland locking screws to tightly press the upper parts of two ends of the cutter shaft.

2. The novel rotary excavating hob according to claim 1, characterized in that: the cutter ring of the integral cutter ring is a single cutter edge, two cutter edges or a plurality of cutter edges, or a steel body or embedded hard alloy teeth.

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