CN110565717A

CN110565717A - Milling tooth with pre-crushing function

Info

Publication number: CN110565717A
Application number: CN201910870787.XA
Authority: CN
Inventors: 王延蒙; 韩冰冰; 黄建华
Original assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Current assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2019-12-13

Abstract

The invention discloses a milling tooth with a pre-crushing function, which comprises a tooth body, a flat tooth blade and a bevel tooth blade; the flat tooth blade and the bevel tooth blade are both arranged at the first end of the tooth body, in the milling direction, the flat tooth blade is positioned at the rear part of the bevel tooth blade, and the milling track of the flat tooth blade completely covers the milling track of the bevel tooth blade. The invention is not only suitable for single stratum, but also suitable for complex stratum, in particular to soil layer, rock stratum with medium hardness and low hardness and complex stratum with soft and hard rocks appearing alternately frequently, and can greatly improve the application range of the milling teeth.

Description

Milling tooth with pre-crushing function

Technical Field

The invention belongs to the technical field of underground diaphragm wall construction equipment, and particularly relates to a milling tooth with a pre-crushing function.

Background

The double-wheel slot milling machine has the advantages of high slot forming efficiency, good slot forming precision and the like, is widely applied to underground construction operation, and becomes core equipment for underground continuous wall construction. In the construction process of the double-wheel slot milling machine, different types of milling teeth are selected according to different rock stratum properties, and the types of the milling teeth mainly comprise three types: flat teeth (standard teeth), tapered teeth (cutting teeth) and hobbing. The flat teeth are mainly suitable for viscous or non-viscous soil layers, pebble layers with the diameter smaller than 50mm, sand layers, weathered rocks and other rock layers with relatively low strength, the end parts of the teeth are wide, and the efficiency is relatively high when the soil layers and the soft rocks are milled; the bevel gear mainly aims at rock formations with medium hardness such as sand layers and weathered rocks, but is not suitable for soil layers and soft rocks, because the action area of the end part of the bevel gear and a medium is small, the bevel gear is easy to cut into the soil layers and the soft rocks when the soil layers and the soft rocks are cut, the volume of the medium after milling is small, scraping cannot be formed, and the construction efficiency is low. The hobbing is suitable for extremely hard rock formations with the strength of more than 120MPa such as medium weathering rocks and weakly weathered rocks, and the number of double-wheel slot milling machines applying the tooth form is small at present.

in the milling process of the double-wheel slot milling machine, the stratum cannot be single, so that complete adaptation is difficult to achieve when the above milling teeth are selected, and the phenomena of serious abrasion of the milling teeth and low milling efficiency occur. If the milling teeth of different types are frequently replaced according to the stratum conditions, especially in complex strata, the labor intensity is increased, a large amount of time is wasted, and the construction efficiency is seriously reduced.

in the chinese patent application with publication number CN103541387A, a cutting wheel for a trencher is proposed, in which two kinds of milling teeth, i.e. chisels and cutting teeth, are uniformly arranged on a hub of the milling wheel, at least one chisel is arranged in a circle, and the arrangement angles of the chisel and the cutting teeth are different, a hard stratum is mainly removed by the chisel, and a softer stratum is mainly removed by the cutting teeth. Because the two types of milling teeth are arranged in a full section, the milling teeth are densely arranged, the phenomenon of wheel pasting is easily generated in a softer stratum, and the milling efficiency is reduced.

Chinese patent application publication No. CN1955383A discloses a cutting tooth of an earth working tool, which uses a flat tooth structure as a basic structure, and a main cutting element for cutting rock is provided at the top of the cutting tooth, and in order to widen the working cross section of the main cutting element, an auxiliary cutting element is provided at the top or side of the cutting tooth, and the cutting elements together remove media over the whole working width, and increase the cutting speed; mainly improves the milling efficiency of the milling teeth in hard rock, and the milling teeth are not suitable for soil layers or soft rock.

In the chinese patent application publication No. CN101806081A, a milling tooth for an underground diaphragm wall grooving machine is disclosed, in which two cutting edges are arranged on the left and right sides of the top end of the tooth body of the milling tooth, having mirror symmetry, and the cutting edges are respectively designed as double cutting edges having parallel cutting edges, and the cutting edges are W-shaped profiles, which is helpful for improving cutting ability. For the milling wheel with bidirectional rotation, when the milling wheel rotates forwards and backwards, the milling teeth can cut soil, for the milling wheel with invariable rotation direction, when the cutting edge on one side of the milling teeth is worn, the milling teeth can be installed in a turnover mode, and the cutting edge on the other side is used for continuing working, so that the service life of the milling teeth can be obviously prolonged, and the cost is saved. And, in the chinese utility model patent of publication No. CN204646117U, a novel twolip plate tooth is disclosed, the head bilateral symmetry at the plate tooth body sets up two alloy bodies that the structure is the same, makes two alloy bodies of twolip plate tooth can both break the rock, has replaced the unilateral form of arranging of traditional plate tooth alloy to set up the wearing layer at twolip plate tooth body surface, thereby improved the life-span of plate tooth, strengthened the practicality of plate tooth. The milling teeth in the two schemes are mainly suitable for soil layers or softer rock layers, the applicability of the soil layers is still not strong, and the applicability of the soil layers is not improved.

Disclosure of Invention

Aiming at the problems, the invention provides a milling tooth with a pre-crushing function, which is not only suitable for a single stratum, but also suitable for a complex stratum, in particular suitable for a stratum, a medium-hard rock stratum and a complex stratum with soft and hard rocks appearing alternately frequently, and can greatly improve the application range of the milling tooth.

In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:

A milled tooth with pre-crushing functionality comprising:

A tooth body;

the milling track of the flat tooth edge completely covers the milling track of the conical tooth edge.

Optionally, the cutting angle θ of the tapered tooth edge ranges from 50 ° to 60 °.

optionally, the largest diameter of the tapered tooth edge is smaller than the width of the flat tooth edge.

Optionally, the width of the flat tooth edge is greater than the width of the tooth body, and a distance exists between each of the two ends of the flat tooth edge in the width direction and the corresponding outer wall of the tooth body.

Optionally, the distance between the two ends of the flat tooth edge in the width direction and the corresponding outer wall of the tooth body is equal.

optionally, the flat tooth edge portion is embedded inside the tooth body.

optionally, a V-shaped groove is formed in the outer wall of the tooth body.

Optionally, the V-shaped groove is disposed on a side wall and/or a second end of the tooth body, and the second end is disposed opposite to the first end.

Optionally, a through fixing hole is formed in the tooth body.

optionally, a through-type tool hole is formed in the tooth body.

Compared with the prior art, the invention has the beneficial effects that:

The invention provides a milling tooth with a pre-crushing function, which is not only suitable for a single stratum, but also suitable for a complex stratum, in particular suitable for a stratum, a medium-hard rock stratum and a complex stratum with soft and hard rocks appearing alternately frequently, and can greatly improve the application range of the milling tooth. In the soil layer and the rock stratum with middle hardness and lower part, the abrasion of the milling teeth can be reduced, and the milling efficiency is improved; when the device is constructed in a complex stratum with soft and hard rocks appearing alternately frequently, the milling teeth do not need to be replaced frequently according to the stratum condition, the workload is reduced, and the time is saved. By using the milling teeth, the applicability and the wear resistance of the milling teeth can be improved under the condition that different types of milling teeth are not frequently replaced, and the milling efficiency is greatly improved.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of a milling tooth with a pre-crushing function according to an embodiment of the invention;

Fig. 2 is a left side view of the milling tooth with pre-crushing function of fig. 1;

Fig. 3 is a front view of the milled teeth of fig. 1 with a pre-crushing function;

FIG. 4 is a top view of the milled teeth of FIG. 1 with a pre-crushing function;

FIG. 5 is a top view of a tooth milling trajectory;

wherein: 1-tooth body, 2-flat tooth edge, 3-tapered tooth edge, 4-tool hole, 5-fixing hole, 6-V-shaped groove, 7-milling track of flat tooth edge and 8-milling track of tapered tooth edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.

The invention provides a milling tooth with a pre-crushing function, which specifically comprises the following components as shown in figures 1-4: the tooth body 1, the flat tooth blade 2 and the bevel tooth blade 3;

The tooth body 1 is provided with a through type fixing hole 5 and a tool hole 4, and the outer wall of the tooth body is provided with V-shaped grooves; in another specific embodiment of the present invention, the V-shaped grooves are provided on two opposite side walls of the tooth body 1 and on a second end, which is disposed opposite to the first end; in a third specific embodiment of the present invention, the V-shaped groove is disposed on a second end of the tooth body 1, and the second end is disposed opposite to the first end; the milling teeth can be directly inserted and welded on a toothed plate on the milling wheel through the V-shaped grooves 6, and then the milling teeth are fixed on the toothed plate through the fixing holes 5, so that the milling teeth are prevented from falling off; when the milled teeth need to be disassembled, the pin shaft in the fixing hole 5 is firstly pulled out, and then the milled teeth are disassembled by using the tool hole 4;

The flat tooth edge 2 and the tapered tooth edge 3 are both arranged at a first end of the tooth body 1, in the milling direction, the flat tooth edge 2 is located at the rear part of the tapered tooth edge 3, the maximum diameter of the tapered tooth edge 3 is smaller than the width of the flat tooth edge 2, and during construction, a milling track 7 of the flat tooth edge completely covers a milling track 8 of the tapered tooth edge, specifically referring to fig. 5. In the concrete implementation process, in order to ensure the structural stability, the flat tooth blade 2 and the tapered tooth blade 3 are connected with the tooth body 1 in a welding mode, and part of the flat tooth blade 2 is embedded into the tooth body 1, so that the connection is firmer.

In a specific embodiment of the present invention, the cutting angle θ of the tapered tooth edge 3 is in the range of 50 ° to 60 °, so that the milling tooth is more likely to invade rock and the tapered tooth edge 3 is less resistant to milling. In the milling process, the conical tooth edges 3 also reduce the abrasion of the flat tooth edges 2, and even if the front conical tooth edges 3 are seriously abraded or have the tooth breaking phenomenon during milling, the rear flat tooth edges 2 can still continue to work, so that the service life of the milled teeth is prolonged.

In one embodiment of the present invention, the width of the flat tooth edge 2 is greater than the width of the tooth body 1, and there is a distance between the two ends in the width direction and the corresponding outer walls of the tooth body 1; preferably, the distances between the two ends of the flat tooth edge 2 in the width direction and the corresponding outer walls of the tooth body 1 are equal; in the specific implementation process, the two sides of the flat tooth blade 2 are respectively wider by about 1mm relative to the two sides of the tooth body 1, so that the flat tooth blade 2 can protect the tooth body 1 during milling, and the abrasion on the two sides of the tooth body 1 is reduced.

In summary, the following steps:

The invention provides a milling tooth with a pre-crushing function, which has a wide stratum application range and is particularly suitable for soil layers, rock stratums with medium hardness and low hardness and complex stratums with soft and hard rocks appearing alternately frequently. The upper end of the tooth body 1 is provided with two tooth edges of a conical tooth edge 3 and a flat tooth edge 2, the tooth edges are arranged front and back along the milling direction, the conical tooth edge 3 is arranged in the front of the flat tooth edge 2, the milling tracks of the conical tooth edge 3 and the flat tooth edge coincide, the conical tooth edge 3 has the function of pre-crushing a medium, and the milling efficiency is high.

In a soil layer and a softer rock stratum, the contact area of the flat tooth blade 2 and a medium is larger, the medium can be scraped in a large area, and the efficiency is higher; in the medium-hard rock layer, the bevel tooth edge 3 has a pre-crushing function, the rock is firstly milled, the rock-crushing capacity is strong, a large number of cracks are generated on the surface of the rock layer after milling, the rock is pre-crushed, the resistance is obviously reduced when the flat tooth edge 2 is milled immediately afterwards, and the abrasion of milling teeth can be reduced; in a complex stratum where soft rock and hard rock frequently and alternately appear, the flat tooth edge 2 plays a main role in scraping the rock when the soft rock is milled; when milling hard rock, the bevel blade 3 firstly crushes the hard rock to generate a large number of cracks, so that the flat blade 2 is convenient to mill, milling teeth do not need to be frequently replaced according to stratum conditions, the workload is reduced, the time is saved, the applicability of the milling wheel is improved, and the milling efficiency is greatly improved.

During milling, the bevel tooth edges 3 are provided with proper cut-in angles, so that milling teeth can easily invade rocks, and milling resistance is reduced. In the milling process, the conical tooth edges 3 also reduce the abrasion of the flat tooth edges 2, and even if the front conical tooth edges 3 are seriously abraded or have the tooth breaking phenomenon during milling, the rear flat tooth edges 2 can still continue to work, so that the service life of the milled teeth is prolonged. The width of the flat tooth edge 2 is larger than that of the tooth body 1, so that the tooth body 1 is protected during milling, and the abrasion of the tooth body 1 is reduced.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A milling tooth with pre-crushing function, characterized by comprising:

a tooth body;

2. A milled tooth with pre-crushing function according to claim 1, characterized in that: the cutting angle theta of the conical tooth blade ranges from 50 degrees to 60 degrees.

3. a milled tooth with pre-crushing function according to claim 1, characterized in that: the maximum diameter of the tapered tooth edge is smaller than the width of the flat tooth edge.

4. A milled tooth with pre-crushing function according to claim 1, characterized in that: the width of the flat tooth blade is larger than that of the tooth body, and distances are reserved between the two ends of the flat tooth blade in the width direction and the corresponding outer walls of the tooth body respectively.

5. A milling tooth with pre-crushing function according to claim 4, characterized in that: the distances between the two ends of the flat tooth edge in the width direction and the corresponding outer walls of the tooth body are equal.

6. A milled tooth with pre-crushing function according to claim 1, characterized in that: the flat tooth edge is partially embedded in the tooth body.

7. A milled tooth with pre-crushing function according to claim 1, characterized in that: and a V-shaped groove is formed in the outer wall of the tooth body.

8. A milled tooth with pre-crushing function according to claim 7, characterized in that: the V-shaped groove is formed in the side wall and/or the second end of the tooth body, and the second end and the first end are arranged oppositely.

9. A milled tooth with pre-crushing function according to claim 1, characterized in that: and a through type fixing hole is formed in the tooth body.

10. A milled tooth with pre-crushing function according to claim 1, characterized in that: and a through type tool hole is formed in the tooth body.