Twist drill crushing structure

Abstract

The utility model discloses a twist drill crushing structure which comprises a shell and a drill rod arranged in the shell, a spiral blade is arranged on the drill rod, a plurality of crushing teeth distributed at intervals are arranged on the outer edge of the spiral blade, the included angle between the crushing teeth and the horizontal plane is gradually increased along with decreasing of the height, and a wear-resistant layer is arranged in the shell. The bottom section part of the spiral blade is gradually shrunk inwards along with the reduction of the height; according to the utility model, the bottom section part of the spiral blade adopts an inward shrinkage shape, and the crushing teeth with variable angles are arranged at intervals, so that the crushing efficiency of coal briquettes can be improved, and the sampling uniformity is improved.

Description

Technical Field

[0001] The utility model relates to the field of spiral drills, in particular to a spiral drill crushing structure. Background Art

[0002] The auger equipment of the coal sampling equipment in the prior art relies on spiral blades for sampling during the sampling process, which causes great wear on the spiral blades and has the problem of poor sampling uniformity due to low crushing efficiency. Based on this, the present application designs an auger crushing structure to solve this problem. Utility Model Content

[0003] The utility model provides a spiral drill crushing structure, which can at least solve one problem pointed out in the background technology.

[0004] A spiral drill crushing structure includes a shell and a drill rod arranged in the shell. The drill rod is provided with a spiral blade. A plurality of crushing teeth are arranged at intervals on the outer edge of the spiral blade. As the height decreases, the angle between the crushing teeth and the horizontal plane gradually increases.

[0005] A wear-resistant layer is arranged in the shell.

[0006] The bottom section of the spiral blade gradually shrinks inwards as the height decreases.

[0007] Preferably, a plurality of limiting rods are evenly installed on the outside of the shell.

[0008] Preferably, a drill bit is provided at the end of the drill rod.

[0009] Preferably, the drill bit and the crushing teeth are both made of cemented carbide.

[0010] Preferably, the bottom end of the limiting rod is conical.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the bottom section of the spiral blade of the present invention adopts an inwardly contracted shape, and crushing teeth with varying angles are arranged at intervals, which can improve the crushing efficiency of coal blocks and improve sampling uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a threaded blade without crushing teeth according to the present invention;

[0013] Figure 2 This is a schematic structural diagram of a threaded blade with crushing teeth according to the present invention;

[0014] Figure 3 This is a schematic structural diagram of the crushing teeth of the present invention.

[0015] Description of reference numerals:

[0016] 1-shell, 2-drill rod, 3-drill bit, 4-spiral blade, 5-wear-resistant layer, 6-crushing teeth, 7-limit rod. DETAILED DESCRIPTION

[0017] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0018] like Figures 1 to 3 As shown, an embodiment of the present invention provides an auger crushing structure, comprising a shell 1 and a drill rod 2 arranged in the shell 1, a drill bit 3 is provided at the end of the drill rod 2, a spiral blade 4 is provided on the drill rod 2, a wear-resistant layer 5 is provided in the shell 1, and the spiral blade 4 located in the wear-resistant layer 5 and the portion below the wear-resistant layer 5 (hereinafter referred to as the bottom section) gradually shrinks inward as the height decreases, so that there is a larger crushing space between the spiral blade 4 and the shell 1. In order to improve the sampling uniformity, a plurality of crushing teeth 6 are provided at intervals on the bottom section of the spiral blade 4. In addition, as the height decreases, the angle between the crushing teeth 6 and the horizontal plane gradually increases, that is, Figure 3 As shown, the crushing teeth 6 at the highest point are parallel to the horizontal plane. As the height decreases, the crushing teeth 6 gradually tilt downward. Through the auxiliary crushing of the crushing teeth 6, large coal blocks can be crushed, and the sampling uniformity is improved. Compared with the design of the prior art in which only the crushing structure is provided at the bottom end of the spiral blade 4, the crushing effect and efficiency can be greatly improved.

[0019] In addition, to prevent the spiral blades 4 from damaging the bottom of the carriage, a plurality of limit rods 7 are evenly installed on the outside of the shell 1. The bottom surface of the limit rod 7 is lower than the bottom surface of the drill rod 2, and the bottom end of the limit rod 7 is designed to be conical, thereby reducing the obstruction of the crushing structure moving downward;

[0020] The drill bit 3 and the crushing teeth 6 are both made of cemented carbide. Cemented carbide is a powder metallurgy product with high-hardness refractory metal carbide (WC, TiC) micron-sized powder as the main component, cobalt (Co) or nickel (Ni), molybdenum (Mo) as a binder, and sintered in a vacuum furnace or a hydrogen reduction furnace. It has high hardness and is suitable for coal sampling and crushing.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An auger crushing structure, characterized in that: The invention comprises a shell (1) and a drill rod (2) arranged in the shell (1); the drill rod (2) is provided with a spiral blade (4); and a plurality of crushing teeth (6) are provided at intervals on the outer edge of the spiral blade (4); as the height decreases, the angle between the crushing teeth (6) and the horizontal plane gradually increases.

2. The auger crushing structure according to claim 1, characterized in that: A wear-resistant layer (5) is provided inside the housing (1).

3. The auger crushing structure according to claim 1, characterized in that: The bottom section of the spiral blade (4) gradually shrinks inward as the height decreases.

4. The auger crushing structure according to claim 1, characterized in that: A plurality of limiting rods (7) are evenly mounted on the outside of the housing (1).

5. The auger crushing structure according to claim 1, characterized in that: A drill bit (3) is provided at the end of the drill rod (2).

6. The auger crushing structure according to claim 5, characterized in that: The drill bit (3) and the crushing teeth (6) are both made of hard alloy.

7. The auger crushing structure according to claim 4, characterized in that: The bottom end of the limiting rod (7) is conical.

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