CN-224214170-U - Corrosion-resistant mining pick for cutting of mining machinery

CN224214170UCN 224214170 UCN224214170 UCN 224214170UCN-224214170-U

Abstract

The utility model discloses a corrosion-resistant cutting pick for cutting a mine, which belongs to the technical field of coal mine mining and comprises a tooth handle and a tooth head detachably arranged in the tooth handle, wherein the tooth head comprises a tooth tip part arranged at the head end of the tooth head, a tooth body part arranged at the middle part of the tooth head and a connecting part arranged at the tail end of the tooth head, tooth tip reinforcing protrusions on the surface of the tooth tip part are uniformly arranged, the tooth tip reinforcing protrusions are preferentially worn on the surface of the tooth tip part when the tooth tip part is used, tooth body reinforcing protrusions on the surface of the tooth body part are uniformly arranged, and the tooth body part is preferentially worn on the tooth body reinforcing protrusions when the tooth body part is used. According to the cutting pick for the corrosion-resistant mining machine cutting, the reinforced protrusions are arranged on the surface of the worn pick head, and the reinforced protrusions are worn preferentially when the cutting pick is used, so that the abrasion or damage to the corrosion-resistant layer on the surface of the pick head can be reduced, the abrasion resistance of the pick head can be improved, and the whole service life of the pick head is prolonged.

Inventors

ZHUANG YUAN
QU BIN
Hua Xiubo
WU KUI
LIU HONGXIAO
WU HAOTIAN
DING RUQING
LIU YINZHAO

Assignees

兖矿能源集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250625

Claims (10)

1. A corrosion-resistant cutting pick for cutting mines of mining machinery comprises a tooth handle and a tooth head detachably arranged in the tooth handle; The tooth head is a single tooth head, and the single tooth head comprises a tooth tip part arranged at the head end of the single tooth head, a tooth body part arranged at the middle section of the single tooth head and a connecting part arranged at the tail end of the single tooth head; the surface of the tooth point part is uniformly provided with tooth point reinforcing bulges protruding out of the surface of the tooth point part, and the tooth point part can wear the tooth point reinforcing bulges preferentially when in use; The surface of the tooth body part is uniformly provided with tooth body reinforcing protrusions protruding out of the surface of the tooth body part, and the tooth body part can wear the tooth body reinforcing protrusions preferentially when in use.
2. The corrosion resistant mining pick of claim 1, wherein the tip reinforcing projections are of a dual gradient composite structure comprising, in order from inside to outside, a cemented carbide substrate layer and a surface ceramic coating.
3. The corrosion resistant mining pick of claim 2, wherein the tip reinforcing projections are distributed in a circumferential array along the tip portion.
4. The corrosion resistant mining pick of claim 1, wherein the shank reinforcement projections are of a wear resistant and corrosion resistant composite construction having a cemented carbide substrate layer and a surface ceramic coating in sequence from inside to outside.
5. The corrosion resistant mining machine cutting pick of claim 4, wherein the shank reinforcement projections are distributed in an axial circumferential array along the shank portion.
6. The cutting pick for cutting mine of corrosion resistant mining machine as set forth in claim 1, wherein the surface of said shank portion is further provided with a plurality of circumferentially arrayed concave limiting grooves.
7. The cutting pick of claim 1, wherein the connection is threaded entirely within the shank.
8. The corrosion resistant mining machine cutting pick of claim 1, wherein the pick head is also a double pick head, the double pick head being symmetrically split from two single pick heads.
9. The cutting pick for a cutting mine of a corrosion resistant mining machine according to any one of claims 1 to 8, wherein the whole pick head is of a three-gradient composite material structure except for a tip reinforcing protrusion and a shank reinforcing protrusion, and is sequentially provided with a cemented carbide substrate layer, a transition layer and a surface ceramic coating from inside to outside.
10. The corrosion resistant mining pick of any one of claims 1-8, wherein the entirety of the shank is a duplex stainless steel substrate and surface nitrided layer structure.

Description

Corrosion-resistant mining pick for cutting of mining machinery Technical Field The utility model relates to the technical field of coal mine mining, in particular to a cutting pick for a corrosion-resistant mining machine cutting mine. Background The cutting pick is a core component of mining machines such as a coal cutter, a heading machine and the like and is mainly used for cutting coal strata. Conventional picks typically use cemented carbide (e.g., WC-Co) as the pick head and a steel substrate (e.g., 42 CrMo) as the shank, joined by brazing or interference fit. However, in complex mining environments such as coal mines and metal mines, cutting picks are exposed to humid air, sulfur-containing gas, acidic mine water (such as H + generated by sulfate hydrolysis) and corrosive media such as mineral dust for a long time, and when the cutting pick head is used, the corrosion-resistant layer (coating such as nickel plating, zinc plating and the like) on the outermost layer is worn out first, which can lead to the great reduction of corrosion resistance and further shorten the service life of the cutting pick head. Disclosure of utility model The utility model aims to provide a corrosion-resistant mining cutting pick for cutting a mining machine, which improves the wear resistance of a corrosion-resistant layer. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A corrosion-resistant cutting pick for cutting mines of mining machinery comprises a tooth handle and a tooth head detachably arranged in the tooth handle; The tooth head is a single tooth head, and the single tooth head comprises a tooth tip part arranged at the head end of the single tooth head, a tooth body part arranged at the middle section of the single tooth head and a connecting part arranged at the tail end of the single tooth head; The surface of the tooth point part is uniformly provided with tooth point reinforcing bulges protruding out of the surface of the tooth point part, and the tooth point part can wear the tooth point reinforcing bulges preferentially when in use; The surface of the tooth body part is uniformly provided with tooth body reinforcing protrusions protruding out of the surface of the tooth body part, and the tooth body part can wear the tooth body reinforcing protrusions preferentially when in use. Through adopting above-mentioned scheme, this corrosion-resistant mining machinery cutting pick is through setting up the strengthening arch on the tooth head surface that has worn and torn, and this strengthening arch is preferentially worn and torn when using, so can not only reduce the wearing and tearing or the destruction to tooth head surface anticorrosive coating, can also promote the wearability of tooth head, and then prolongs its holistic life. In order to improve the wear resistance and corrosion resistance of the tooth tip reinforcing protrusion, the tooth tip reinforcing protrusion is designed into a dual-gradient composite material structure, and a hard alloy substrate layer (such as WC-6Co and the like) and a surface ceramic coating (such as a nano Al 2O3 -TiC composite coating and the like) are sequentially arranged from inside to outside. In order to ensure the uniformity of the distribution of the tooth tip reinforcing projections, the tooth tip reinforcing projections are distributed in a circumferential array along the tooth tip portion so that the tooth tip reinforcing projections can cover every position of the tooth tip portion. In order to improve the wear resistance and corrosion resistance of the tooth body reinforcing protrusion, the tooth body reinforcing protrusion is of a wear-resistant and corrosion-resistant composite material structure, and is sequentially provided with a hard alloy substrate layer (such as WC-6Co and the like) and a surface ceramic coating (such as a nano Al 2O3 -TiC composite coating and the like) from inside to outside. In order to ensure the uniformity of the distribution of the tooth reinforcing protrusions, the tooth reinforcing protrusions are distributed in an axial circumferential array along the tooth portion, so that each position of the tooth portion can be covered by the tooth reinforcing protrusions. The cutting pick is characterized in that the cutting pick is provided with a plurality of concave limiting grooves distributed in a circumferential array on the surface of the tooth body part for facilitating disassembly and assembly of the tooth head, and the concave limiting grooves are clamped by means of tools such as a clamp and the like, so that the tooth head is convenient to disassemble and assemble by means of force, and labor is saved during disassembly and assembly of the tooth head. In order to realize the connection of the tooth heads, the connecting part is wholly arranged in the tooth handle through threads, so that the cutting pick is more convenient to assemble and disassemble. The second technica