CN210948679U

CN210948679U - Carbide shield constructs tooth

Info

Publication number: CN210948679U
Application number: CN201921724664.7U
Authority: CN
Inventors: 刘敏锋; 孙乐天; 周方圆; 孙廷枢
Original assignee: Shandong Ruixin Tungsten O Ltd
Current assignee: Shandong Ruixin Tungsten O Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-07
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a carbide shield constructs tooth this carbide shield constructs tooth includes integrated into one piece's first portion, second portion and third portion, wherein the second portion is the even irregular hexagonal prism of width, first portion and third portion are located second portion both sides respectively and are symmetrical about second portion, first portion is by a bottom surface drawing die extension width L of second portion, then with the sixth side of second portion, the fifth side, the part of fourth side drawing die extension α degrees, β, degree, gamma degree formation to second side direction slope respectively, the utility model discloses cut the tunnelling ability reinforce, the impact resistance ability reinforce.

Description

Carbide shield constructs tooth

Technical Field

The utility model relates to a shield constructs the cutter, in particular to carbide shield constructs tooth.

Background

A shield tunneling machine, called shield tunneling machine for short, is a special engineering machine for tunneling, and is widely used in tunnel engineering of subways, railways, highways, municipal works, hydropower and the like. The shield machine crushes and excavates soil and rocks through the rotation of a cutterhead at the front part of the shield machine. The serrated knife or the cutting knife on the cutter head of the shield machine is mainly used for tunneling soft soil or soft rock. The serrated knife is usually connected together by a connecting part, a knife body and a blade through processes such as surfacing welding and the like. The blades of which are also called shield teeth, are the parts of the toothed cutters used to break up rock and earth.

The shield tooth is made of hard alloy, such as ultra-coarse WC grain hard alloy and the like, and the hard alloy is an alloy material made of hard compounds of refractory metals and bonding metal through a powder metallurgy process. When the shield cutter is used, the shield teeth and the connecting part are integrated into a whole through welding to form the complete shield cutter. The shield tooth is used as a part for cutting and crushing soil of the shield machine, and the shape design of the shield tooth has great influence on the cutting and crushing capacity and the tunneling speed of the shield machine. In order to enable the shield machine to operate efficiently, the shape of the shield teeth and the angles between the different faces need to be carefully designed. The traditional shield tooth is a quadrangular prism, a pentagonal prism or a combination of the quadrangular prism and the pentagonal prism, which have regular shapes. The shield tooth is simple in shape and easy to produce, but has the problems of insufficient cutting and tunneling capacity, poor impact resistance and the like.

Disclosure of Invention

The utility model discloses a remedy prior art not enough, provide a carbide shield constructs tooth.

A hard alloy shield tooth comprises a shield tooth main body, wherein the shield tooth main body comprises a first portion, a second portion and a third portion which are integrally formed, the first portion and the third portion are respectively located on two sides of the second portion and are symmetrical relative to the second portion, the second portion is an irregular hexagonal prism, a first side face, a second side face, a third side face, a fourth side face, a fifth side face and a sixth side face of the second portion are located on the same side of a first bottom face and are perpendicularly intersected with the first bottom face, the first side face is parallel to the third side face and are perpendicularly intersected with the second side face, the first side face and the third side face are located on the same side of the second side face, the fifth side face is parallel to the second side face, the sixth side face and the first side face and the fifth side face (e) are obliquely intersected, the fourth side face and the fifth side face (e) and the third side face are obliquely intersected with each other, the first bottom face extension width L is extended, and the portions of the sixth side face, the fifth side face and the fourth side face are respectively inclined towards the direction of the second side face, the eleventh side face and the twelfth side face.

The obtuse angle between the sixth side and the first side is 140 degrees to 146 degrees, the obtuse angle between the sixth side and the fifth side is 126 degrees to 130 degrees, the obtuse angle between the fourth side and the fifth side is 152 degrees to 156 degrees, and the obtuse angle between the fourth side and the third side is 114 degrees to 118 degrees.

The angle of the α angle is 19 degrees, the angle of the β angle is 16 degrees, and the angle of the gamma angle is 18 degrees.

The width of the second portion accounts for 1/8-1/7 of the width of the whole shield tooth body.

The length of the shield tooth body is 30mm to 40.11mm, and the width of the shield tooth body is 14.6mm to 16.61 mm.

The utility model has high strength, strong driving capability, reasonable angle design and good crushing and scraping capability to soil layers; the second part is 1/8 to 1/7 of the whole width of the shield tooth, so that the burst and damage of the shield tooth caused by low impact bearing capacity caused by undersize of the first end face in the tunneling process can be effectively avoided, and the influence of excessively large friction resistance of the first end face on the tunneling efficiency can also be avoided.

Drawings

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

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a sectioning structure of an embodiment of the present invention.

Fig. 3 is a first schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is a second schematic structural diagram of a second embodiment of the present invention.

Fig. 5 is a first schematic structural diagram of a first embodiment of the present invention.

Fig. 6 is a second schematic structural diagram of the first embodiment of the present invention.

In the figure, 1-first part, 2-second part, 3-third part, a-first side, b-second side, c-third side, d-fourth side, e-fifth side, f-sixth side, g-first bottom, a 1-seventh side, b 1-eighth side, c 1-ninth side, d 1-tenth side, e 1-eleventh side, f 1-twelfth side, g 1-second bottom

Detailed Description

The following are only embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

It should be noted that the directions or positional relationships indicated by "left", "right", "front", "back", etc. in the present embodiment are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the indicated devices or elements must have specific directions, be constructed in specific directions and operations, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Fig. 1 to 6 show an embodiment of the present invention. The embodiment provides a cemented carbide shield tooth. The hard alloy shield tooth comprises a shield tooth body. The shield tooth body is sectioned into three parts by two imaginary planes n1 and n 2. These three parts are a first part 1, a second part 2 and a third part 3, respectively. Wherein the second portion 2 is an irregular hexagonal prism of uniform width. The first portion 1 and the third portion 3 are located on both sides of the second portion 2, respectively, and the first portion 1 and the third portion 3 are symmetrical with respect to the second portion 2.

The second part 2 comprises a first side face a, a second side face b, a third side face c, a fourth side face d, a fifth side face e, a sixth side face f and a first bottom face g, wherein the first side face a, the second side face b, the third side face c, the fourth side face d, the fifth side face e and the sixth side face f are positioned on the same side of the first bottom face g and are vertically intersected with the first bottom face g; the first side face a and the third side face c are parallel and are vertically intersected with the second side face b, and the first side face a and the third side face c are positioned on the same side of the second side face b; the fifth side e is parallel to the second side b; the sixth side face f intersects the first side face a and the fifth side face e at obtuse angles, wherein the included angle between the sixth side face f and the first side face a is 140-146 degrees, and the included angle between the sixth side face f and the fifth side face e is 126-130 degrees; the fourth side d intersects the fifth side e and the third side c at obtuse angles, wherein the included angle between the fourth side d and the fifth side e is 152 degrees to 156 degrees, and the included angle between the fourth side d and the third side c is 114 degrees to 118 degrees.

The first bottom surface g of the second part 2 is extended by a drawing width L, and the extended parts of the sixth side surface f, the fifth side surface e and the fourth side surface d are respectively inclined towards the second side surface b by angles α, β and gamma, so that the extended parts of the rest first side surface a of the surfaces d1, the eleventh side surface e1, the twelfth side surface f1 and the second bottom surface g1. of the first part (1) form a seventh side surface a1, the extended parts of the second side surface b form an eighth side surface b1, the extended parts of the third side surface c form a ninth side surface c1, wherein the angle of α is 19 degrees, the angle of β is 16 degrees, and the angle of gamma is 18 degrees.

The width of the second part 2 of the hard alloy shield tooth accounts for 1/8-1/7 of the width of the whole shield tooth body. The length of the shield tooth body is 30mm to 40.11mm, and the width is 14.6mm to 16.61 mm. The fifth side e of the second part 2 is at a distance of 18mm to 25mm from the second side b, the first side a is at a height of 15.2mm to 19.8mm, and the third side c is at a height of 6.33mm to 10.06 mm.

In this embodiment the direction of width and length is for according to the utility model discloses the width direction and the length direction of body that fig. 1 shows, is length direction by the directional third side c's of first side a promptly, is width direction by the directional second bottom surface g 1's of first bottom surface g direction.

Claims

1. A hard alloy shield tooth comprises a shield tooth main body, wherein the shield tooth main body comprises a first portion (1), a second portion (2) and a third portion (3) which are integrally formed, the first portion (1) and the third portion (3) are respectively located on two sides of the second portion (2) and are symmetrical relative to the second portion (2), the hard alloy shield tooth is characterized in that the second portion (2) is an irregular hexagonal prism, a first side face (a), a second side face (b), a third side face (c), a fourth side face (d), a fifth side face (e) and a sixth side face (f) of the second portion (2) are sequentially located on the same side of a first bottom face (g) and are perpendicularly intersected with the first bottom face (g), the first side face (a) and the third side face (c) are parallel and are perpendicularly intersected with a second side face (b), the first side face (a) and the third side face (c) are located on the same side of the second bottom face (b), the fifth side face (e) and the sixth side face (f) and the sixth side face (e) and a drawing angle (g, a drawing angle extension angle 36f) is formed by extension of a twelfth side face (e), a drawing angle (g), a drawing angle extension angle (36 f), a twelfth side face (e) and a drawing angle extension angle (82 d) and a twelfth side face (e) which are respectively formed by a drawing angle which is extended from a drawing angle which is extended angle 36e).

2. The cemented carbide shield tooth of claim 1, wherein: the obtuse angle between the sixth side (f) and the first side (a) is 140 degrees to 146 degrees, the obtuse angle between the sixth side (f) and the fifth side (e) is 126 degrees to 130 degrees, the obtuse angle between the fourth side (d) and the fifth side (e) is 152 degrees to 156 degrees, and the obtuse angle between the fourth side (d) and the third side (c) is 114 degrees to 118 degrees.

3. The carbide shield tooth according to claim 1, wherein said angle α is 19 degrees, said angle β is 16 degrees, and said angle γ is 18 degrees.

4. A cemented carbide shield tooth according to any one of claims 1 to 3, wherein: the width of the second part (2) accounts for 1/8-1/7 of the width of the whole shield tooth body.

5. A cemented carbide shield tooth according to any one of claims 1 to 3, wherein: the length of the shield tooth body is 30mm to 40.11mm, and the width of the shield tooth body is 14.6mm to 16.61 mm.