CN201057047Y - Hard alloy coal cutting tooth for mining - Google Patents
Hard alloy coal cutting tooth for mining Download PDFInfo
- Publication number
- CN201057047Y CN201057047Y CNU2007200637570U CN200720063757U CN201057047Y CN 201057047 Y CN201057047 Y CN 201057047Y CN U2007200637570 U CNU2007200637570 U CN U2007200637570U CN 200720063757 U CN200720063757 U CN 200720063757U CN 201057047 Y CN201057047 Y CN 201057047Y
- Authority
- CN
- China
- Prior art keywords
- coal cutting
- cutting teeth
- tooth
- screw threads
- hard alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility mode discloses a mining hard alloy coal cutting tooth, which comprises a conical nose, a plurality of projected screw threads with same rotating direction arranged on the conical nose, depressed screw thread with same rotating direction is arranged among the projected screw threads. After the coal cutting tooth is installed on a driving machine roller drum, the projected screw threads on the coal cutting tooth can drive the whole cutting teeth to rotate in an axial direction way along the reverse direction of the rotating direction of the screw threads in a tooth holder socket on the rotating drum during the construction when being subjected to continuous resistance and impact and extrusion, a certain part of the working surface of a coal cutting teeth head end which is always contacted with a rock face and wore can be avoided, resulting in the fracture of the coal cutting teeth. The depressed screw threads as the channel of heat radiation, rock dust drainage and gas drainage can absorb dust water sprayed on a tooth holder, and the rock formation cutting efficiency of a coal cutting teeth tooth point at the low temperature and the whole wear resistance of the coal cutting teeth are protected.
Description
Technical field
The utility model belongs to the carbide alloy mining tool, is specifically related to a kind of mining hard alloy coal cutting teeth.
Background technology
At present, the head of mining hard alloy coal cutting teeth all is that the cone or half ball-crown body of the smooth work plane of circular cone constitutes, and tooth body and the soldering of taper base frame are gone in the hole of steel-tooth body front end, are assembled into the pick of engineering development machine.Pick is installed in the toothholder nest on the development machine cylinder, and toothholder is welded on the development machine cylinder with electric welding.When development machine cylinder rotary work, its pick that coal cutting teeth is housed cuts the rock stratum thereupon, because the rock stratum crag is to the extruding of smooth the putting up a resistance property of work plane of coal cutting teeth circular cone, pick can't rotation in the toothholder nest, make the smooth work plane part of coal cutting teeth circular cone be worn away into a plane repeatedly by crag all the time, cause the alloy coal cutting teeth exposed, this moment, the flexural strength of coal cutting teeth declined to a great extent, fracture when very easily causing coal cutting teeth work perhaps makes coal cutting teeth come off in the steel-tooth body; Simultaneously, the steel-tooth body very easily produces spark with the crag friction after losing the protection of coal cutting teeth alloy, in case the gas density on the working face of coal seam is concentrated, the danger of gas explosion is arranged then.So it is to cause coal cutting teeth fracture, cause naked light, cause the key factor of gas explosion incident that pick integral body can not be rotated on cylinder freely.Just because of this, the every driving certain hour of mining excavation machine operation person just must stop headwork, and the pick on the rotary drum avoids certain part of coal cutting teeth work plane to be concentrated extruding and abrasion by hand.
On the other hand, the head of existing mining hard alloy coal cutting teeth is cone or half ball-crown body, cuts the rock stratum in coal cutting crown incision rock stratum, the tooth head is airtight by the rock stratum, tooth head temperature up to 500 ℃ about, rock dust is current can't discharge, the water spray on the pick toothholder can't spray and crown, so the wearing and tearing of pick crown are big, quick abrasion, and easily collapse tooth, the product operating period is short, production efficiency is low, causes the particularly waste of strategic tungsten resource of China's resources of production.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of mining hard alloy coal cutting teeth is provided.After development machine adopted this coal cutting teeth, pick can rotate automatically in tunneling construction, was worn thereby avoid certain part of coal cutting teeth head work plane to contact with crag all the time, caused the coal cutting teeth fracture.This coal cutting teeth can also solve the problem that rock dust is discharged in the construction, reduces wearing and tearing, increases application life.
Realize that the technical scheme that the utility model purpose adopts is: mining hard alloy coal cutting teeth comprises conical nose, is provided with the convex thread of some rotation direction unanimities on conical nose, forms the recessed screw thread of rotation direction unanimity between the convex thread.
The utility model mining hard alloy coal cutting teeth is contained on the development machine cylinder after being made into pick, in the construction along with the rotation of development machine cylinder, when the convex thread on this coal cutting teeth impacts and pushes in the lasting opposing that is subjected to the rock stratum crag, will drive whole pick on cylinder in the toothholder nest along thread rotary orientation rightabout axial rotation, can avoid certain part of coal cutting teeth head work plane to contact with crag all the time and be worn, cause the coal cutting teeth fracture.The rotation of pick can be converted into rotary motive power with the straight line power of rock effect on it.The radius of coal cutting teeth convex thread is directly proportional with the pick rotating speed, and the required external force of the bigger rotation of radius is littler.So need be when driving, every work a period of time is the pick on the rotary drum by hand, and the serialization operating efficiency 1.5-2 that significantly improves the development machine pick doubly increases the service life, and significantly reduces the cost of driving rock stratum.
When coal cutting teeth on the pick and the cutting of rock stratum crag; recessed screw thread on it can be used as the passage of heat radiation, row's rock dust, gas-removing gas; can absorb the dust water that toothholder sprays, protection pick crown at low temperatures cutting rock stratum efficient and the overall wear resistance of coal cutting teeth.Simultaneously the healthy of mining excavation machine operation person played a protective role, also can eliminate the gas explosion that development machine may cause because of coal cutting teeth fracture friction.
Description of drawings
Fig. 1 is the structural representation of the utility model mining hard alloy coal cutting teeth.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the different structure schematic diagram of the utility model mining hard alloy coal cutting teeth.
Fig. 4 is the mode of occupation schematic diagram of mining hard alloy coal cutting teeth on pick.
The specific embodiment
Embodiment 1: as shown in Figure 1, 2, mining hard alloy coal cutting teeth is made up of tooth body 1 and conical nose, is provided with the convex thread 2 of some rotation direction unanimities on conical nose, forms the recessed screw thread 3 of rotation direction unanimity between the convex thread 2.
Embodiment 2: the utility model also comprises structure as shown in Figure 3, and its head is half ball-crown body, and top concave, convex screw thread is identical with embodiment 1.
Mode of occupation of the present utility model is seen Fig. 4, and the tooth body soldering of mining hard alloy coal cutting teeth A is assembled into engineering development machine coal cutting teeth in the hole of steel-tooth body B front end.
Claims (1)
1. a mining hard alloy coal cutting teeth comprises conical nose, it is characterized in that being provided with on conical nose the convex thread of some rotation direction unanimities, forms the recessed screw thread of rotation direction unanimity between the convex thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200637570U CN201057047Y (en) | 2007-07-09 | 2007-07-09 | Hard alloy coal cutting tooth for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200637570U CN201057047Y (en) | 2007-07-09 | 2007-07-09 | Hard alloy coal cutting tooth for mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057047Y true CN201057047Y (en) | 2008-05-07 |
Family
ID=39425888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200637570U Expired - Fee Related CN201057047Y (en) | 2007-07-09 | 2007-07-09 | Hard alloy coal cutting tooth for mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057047Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121383A (en) * | 2010-10-17 | 2011-07-13 | 李仕清 | Efficient cutting tooth |
| AU2013205232B2 (en) * | 2012-04-23 | 2015-11-26 | Myles Aaron Wylie | Frictional Heat Suppressing Tip and Pick |
-
2007
- 2007-07-09 CN CNU2007200637570U patent/CN201057047Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121383A (en) * | 2010-10-17 | 2011-07-13 | 李仕清 | Efficient cutting tooth |
| AU2013205232B2 (en) * | 2012-04-23 | 2015-11-26 | Myles Aaron Wylie | Frictional Heat Suppressing Tip and Pick |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080507 |