CN201363145Y - Cutting pick for coal mining and engineering - Google Patents
Cutting pick for coal mining and engineering Download PDFInfo
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- CN201363145Y CN201363145Y CNU2008202277447U CN200820227744U CN201363145Y CN 201363145 Y CN201363145 Y CN 201363145Y CN U2008202277447 U CNU2008202277447 U CN U2008202277447U CN 200820227744 U CN200820227744 U CN 200820227744U CN 201363145 Y CN201363145 Y CN 201363145Y
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Abstract
The utility model relates to a cutting pick for coal mining and engineering, which consists of a hard alloy main pick and a cutting pick body, wherein auxiliary picks are arranged on the periphery of the hard alloy main pick on the cutting pick body, and the end of the auxiliary pick is of a pick top or a pick edge for cutting. Since the auxiliary pick involves in cutting, the cutting pick body can be protected, and the working resistance also can be greatly reduced, and the utility model has good and reliable rotating performance, so the cutting pick realizes the goal of the constant strength design of the pick top and the cutting pick body, and improves the explosion-proof safety of the coal mining.
Description
Technical field
The utility model relates to a kind of the coal mining and pick that engineering is used.
Background technology
The quality quality of pick is directly connected to the efficient and the cost of exploitation excacation and the life-span of excavating pick equipment.In the colliery digging was used, pick also should be tried one's best less or the generation of arc control, improves production security.In order to adapt to various target, improve the application life of pick-like bit in the application, the product of each major company of the world is also constantly being done some structural improvement.These structural improvement mainly are conceived to improve pick tip penetration power and life-span, improve the abrasion resistance of denticle head.
Up to the present, the structure of pick-like bit is divided into three kinds (seeing Fig. 1, Fig. 2, Fig. 3) substantially, though three kinds of pick structure differences, but the failure mode of these picks is not to lose efficacy owing to the carbide alloy point damages more than 85%, but loses efficacy owing to the wearing and tearing too early of pick body head cause the alloy point to come off.
The DE19821147A1 patent announced a kind of around the pick point technical scheme (Fig. 4) of uniform cylindrical or cone wear body.But the technical scheme of DE19821147A1 is not optimized, has following shortcoming:
The first, in order to arrange wear body 4, increased the projected area 6 on the pick body running direction, increased the working resistance of instrument, in real work, can cause the vibrations of machinery equipment and the increase of energy consumption.
The second, its flat-top end face cylindric or coniform wear body also can increase working resistance, also has the fragmentation of bursting apart that can be hit at work of the straight edge of wear body, weakens the effect of its opposing wearing and tearing.
Three, scheme not to the height of wear body 4 and diameter than providing clear and definite defining; on its diagram; the height and the diameter of wear body 4 are smaller; substantially can only protect the metallic matrix of instrument shoulder, but in the use of pick instrument, pick is whole can to insert sandstone or material; material can cause wearing and tearing to whole the first half of pick; highly less wear body can lose support because of the frayed loss of metal of its periphery and bottom, causes to come off, and can not protect pick (seeing Figure 13) longer.
The patent No. is that 200610102129.9 technical scheme is wear-resisting engineering pick, though increased the height of wear body, has prolonged the life-span of pick; But the technical scheme with DE19821147A1 is the same, in order to arrange wear body, a big step must occur on the pick body, and this step produces huge resistance when pick is worked.
Summary of the invention
Technical problem to be solved in the utility model provides little, high efficiency, minimizing energy consumption of a kind of high life, working resistance and has increased the coal mining and the engineering pick of explosion-proof security.
The utility model adopts following technical scheme:
The utility model is made of carbide alloy master tooth and pick body, it is characterized in that on pick body carbide alloy master tooth around be provided with secondary tooth, described secondary tooth ends is the crown or the land that can participate in the work of cutting.
The crown of secondary tooth described in the utility model is the long-pending shape that reduces gradually of coniform, mushroom or the spherical uniform section of cambered surface.
The land of secondary tooth described in the utility model is single wedge surface land or folding wedge face land.
The secondary tooth ends that the utility model has a crown is higher than the front end face of pick body.
It is concordant with the front end face of pick body or be higher than the front end face of pick body that the utility model has the secondary tooth ends of land.
The diameter of secondary tooth described in the utility model and aspect ratio were greater than 1: 1.5---and 5.
The peripheral pick body of main tooth described in the utility model is provided with 3-50 secondary tooth, and the best is 6-20.
Secondary tooth described in the utility model imbed the degree of depth in the pick body greater than 1/3 of main tooth length of embedment.
The secondary tooth of the utility model imbed the degree of depth in the pick body greater than 1/3 of main tooth maximum gauge.
The part that secondary tooth described in the utility model is imbedded the pick body is cylinder or Rotary-table.
The utility model good effect is as follows:
By to the technical scheme of the utility model scheme and patent DE19821147A1 with the contrast of the technical scheme of 200610102129.9 1 kinds of wear-resisting engineering picks announcing before, actual effect has remarkable superiority, is discussed below:
1. the contrast test of the technical scheme pick of patent DE19821147A1:
What at first carry out is the contrast test of DE19821147A1 scheme technology, taps in the work in the colliery and carries out.Tapping face height is 4m, and face length is 100m, and coal-winning machine is tapped feeding and is set at 0.6m, and the walking feeding is set at 7.7m/min, and the coal mining machine roller speed setting is 28rpm.Work plane seam hardness f=3.9, condition of work is very abominable.Before the test, ore deposit side uses common non-wear resistant cutting pick to tap work, because the coal seam is harder, the pick loss is serious, pick can not adhere to finishing 100 meters cutting work of entire working surface length, and per tour (8 hours) needs to change 89 of common picks, and per tour output of coal is 2000 tons.The pick of the technical scheme of 200610102129.9 1 kinds of wear-resisting engineering picks that provide, make contrast test with each 400 of the picks that is provided with wear body of DE19821147A1 scheme: the pick of at first under the situation that does not change the coal-winning machine parameter, testing the DE19821147A1 scheme, coal winning machine cutting bit all is changed to this pick, but coal-winning machine is once opening the phenomenon that current overload occurs, coal-winning machine is because the drag area increasing of pick, can not smooth-goingly cut, machine vibration is very big, the edge of pick head broad is actual to be in the knocking coal seam, produced huge dust, the miner worries that machine overload is damaged and dust exceeds standard has interrupted work.In order to test the wear-resisting effect to pick, the operation miner has to be set at 4.0m/min with tapping parameter adjustment for the walking feeding, and the coal mining machine roller speed setting is 19rpm, taps feeding and still is set at 0.6m.After the adjustment, machine is worked under ordinance load reluctantly, and by observing, wear body truly has the effect of slowing down wearing and tearing, but when cutting to 95m, obscission appears in wear body, and subsequently, master's tooth begins to come off when 120m, must shut down and change.Four classes (32 hours) have been carried out in test, change and damage 276 of picks, and average per tour is changed 69,2100 tons of average per tour outputs of coal.
2. invent the contrast test of the wear-resisting engineering pick of 200610102129.9 technical schemes:
Then, the wear-resisting engineering pick of 200610102129.9 technical schemes is tested by ore deposit side, and coal winning machine cutting bit all is changed to this pick, and the coal-winning machine parameter reverted to taps feeding and be set at 0.6m, the walking feeding is set at 7.7m/min, and the coal mining machine roller speed setting is 28rpm.Occurred previous vibrations and dust problem after on-test equally, the miner has been interrupted work.In order to test the wear-resisting effect to pick, the operation ore deposit will be tapped parameter adjustment equally and will be set at 4.0m/min for the walking feeding, and the coal mining machine roller speed setting is 19rpm, taps feeding and still is set at 0.6m.After the adjustment, machine is worked under ordinance load.When machine walking 80m, wearing and tearing with wear body perimeter steel pick body, elongated wear body exposes outstanding, while is owing to pick shoulder boss reducing, the coal-winning machine working resistance begins to reduce, by observing, wear body top exposes to some extent, and bursting apart appears in the cylinder tip edge, but because length of embedment still is enough to keep its operate as normal and slows down wearing and tearing, the operation miner thinks that working resistance is less, and the load deficiency appears in coal-winning machine work, so the operate as normal parameter before returning to is heightened in decision: promptly, behind the work walking 80m, the walking feeding is set at 7.7m/min, and the coal mining machine roller speed setting is 28rpm, taps feeding and still is set at 0.6m.The time that main tooth rim encloses is longer because the wear body of the technical scheme of the ratio DE19821147A1 of the wear body of this scheme remains on, and when 160m was walked in cutting, obscission just appearred in secondary tooth, and master's tooth begins to come off when cutting 200m.Four classes (32 hours) have been carried out in test, change and damage 220 of picks, and average per tour is changed 55,2350 tons of average per tour outputs of coal.
Find by above-mentioned test, although the wear-resisting engineering pick of 200610102129.9 technical schemes increases than the technical scheme pick effect of patent DE19821147A1, but still have room for improvement, so decision is improved to the secondary tooth with cutting power that the utility model proposes with the wear body top, and carries out further contrast test at the same work plane that carries out above-mentioned test.
3. the contrast test of the secondary tooth pick that the utility model proposes with cutting power:
The pick that is provided with secondary tooth of ore deposit side's advance copy scheme all is changed to this programme pick with coal winning machine cutting bit, and the coal-winning machine parameter reverted to taps feeding and be set at 0.5m, and the walking feeding is set at 7.7m/min, and the coal mining machine roller speed setting is 28rpm.After on-test behind the operate as normal walking 20m, the operation miner thinks that working resistance is less, coal-winning machine service load deficiency, so running parameter is heightened in decision: the walking feeding is set at 12.8m/min, the coal mining machine roller speed setting is 28rpm, taps feeding and still is set at 0.6m.Because the sharp-pointed profile of this programme pick and the fragmentation work that secondary tooth has participated in coal cinder have higher penetration power, parameter is heightened the back machine still can operate as normal.By observing, the effect of secondary tooth is remarkable, and the pick of changing is when cutting to 280m for the first time, and obscission just appears in secondary tooth, and master's tooth begins to come off when cutting 350m.Four classes (32 hours) have been carried out in test, change and damage 52 of picks, and average per tour is changed 13,3500 tons of average per tour outputs of coal.
The comparative test result of different picks
| Per tour waste | Waste/ton coal | Shut down the replacing time | |
| Common pick | 89 | 0.045 | 120 minutes/class |
| Deutsche Bundespatent wear body pick | 69 | 0.033 | 90 minutes/class |
| The Chinese patent wear resistant cutting pick | 55 | 0.023 | 75 minutes/class |
| The utility model scheme pick | 13 | 0.004 | 18 minutes/class |
In practical application example, the advantage of secondary tooth scheme is more remarkable, is about to the material fragmentation because have the secondary tooth that cuts blade tip before material contact pick body, thereby has reduced the abrasion of material to pick body steel, has further stoped the denticle wear process.
In another experiment, pick master tooth diameter 22mm, equipped length is the secondary tooth of 6mm for the 18mm diameter, when secondary tooth reached 15mm owing to pick body wearing and tearing length of exposure, main tooth still can operate as normal.Cutting-gear life prolongs 2 to 4 times.Obviously, adopt aforesaid wear body structure as test, short and thick wear body can come off after its peripheral pick body wearing and tearing are run off, and the protection effect is relatively poor.
Scheme according to DE19821147A1 is described, and wear body can help pick to rotate at work.Enclose the long enough time but can not be fixed on main tooth rim as wear body, its effect also is limited so.Secondary tooth of the present utility model can guarantee the rotation of pick from the beginning, and in addition, the main tooth rim that is retained in that again can be more lasting encloses, and just can guarantee from start to finish also that certainly pick produces rotation.
Pick is when work, and the pick body of steel can produce spark in the collision with material (for example coal, rock) contacts, may threaten to coal production safety.Secondary tooth of the present utility model is by fragmentation and the contact area that itself has reduced the pick body of material and steel to material, and secondary tooth material does not produce the hard material of spark when being friction, thereby, pick and material collision produce the spark probability and reduce greatly, the then the utility model generation that also will lower spark greatly when prolonging cutting-gear life, this point has very important meaning to downhole production safety.
One of advantage of the present utility model also is: realized the equal strength design of pick body and crown.In the design and manufacturing of pick, the equal strength design is the target that the designer pursues; So-called equal strength design is meant that the denticle of pick wants intensity to equate with crown, that is: pick does not does not wear and tear because of denticle is too early at work and do not cause crown to come off.Use structure of the present utility model, for different targets, select the major and minor tooth of different size can realize the equal strength design of pick.
According to the above, advantage of the present utility model is:
As previously mentioned, technical problem to be solved in the utility model provides little, high efficiency, minimizing energy consumption of a kind of high life, working resistance and increases the coal mining of job security and the pick that engineering is used.By argumentation and actual test to the utility model structure, performance, the pick that the utility model provides all is better than existing pick in all fields, and the advantage of the utility model pick is summarized as follows.
The first, secondary tooth participates in cutting, has not only protected the pick body, and has reduced working resistance greatly.
The utility model is by the secondary tooth top of optimization portion shape, making it participate in the material breaker together with main tooth does, not only can be because of the working resistance that increases the projected area increase instrument on the pick body running direction, making it get involved the material breaker on the contrary does, lower working resistance, overcome the straight edge of wear body broken inefficacy of bursting apart that can be hit at work simultaneously, thereby can prolong of the protective effect of secondary tooth the steel denticle; Such design can make the work insertion portion of pick more sharp-pointed, thereby reduces resistance and the vibrations that produce in the pick work.The extra work resistance that previous DE19821147A1 patent wear body is brought, in practice, this scheme can increase the abominable of machining.Require pick to have in the case of higher penetration performance for some, cylindrical or conical wear body can't be disposed in main tooth rim and enclose, and makes the machine can't operate as normal otherwise these wear body can lower the penetration capacity of pick greatly.In the coal mining real cases: the pick that adopts cylindrical wear body more similarly is in the hammering coal pieces at work, but not cutting; A large amount of dust that huge vibrations that it causes and hammering produce force work to be interrupted.And the pick that adopts the utility model to provide can efficiently fulfil assignment.Because the said structure of secondary tooth of the present utility model and its effective protective effect, utilize this programme can eliminate pick that pick master tooth rim encloses step fully perpendicular to axis to the pick body.
The second, good, verticity reliably.
The utility model pick is when work, and good, reliable verticity is very important.Verticity missionary society causes the pick mill partially, influence the cutting performance of pick and reduce cutting-gear life greatly, the secondary tooth of the utility model pick can guarantee the rotation of pick all along, make pick in the course of the work around wearing and tearing evenly, guaranteed the good cutting performance of pick and improved pick application life.
Three, more permanent life-span.
The utility model also will be by optimizing the diameter and the aspect ratio of secondary tooth; the length of secondary tooth and larger area weld seam make it can be fixed on main tooth rim for more time to enclose; can not cause the secondary tooth early fallout made from the precious metal carbide alloy, it is broken and to the wear-resistant protection work of pick body to get involved material more muchly.Thereby can there be the more permanent life-span.
Four, improved the explosion-proof security of channel of coal mining working.
The utility model pick is when work, and the pick body of steel can produce spark in the collision with material (for example coal, rock) contacts, cause the blast of gas and coal dust, may threaten to coal production safety.Secondary tooth of the present utility model is by fragmentation and the contact area and the contact stress that itself have reduced the pick body of material and steel to material, and secondary tooth material does not produce the hard material of spark when being friction, thereby pick and material collision produce the spark probability and reduce greatly.So, the utility model also will lower spark greatly when prolonging cutting-gear life generation, this point has very important meaning for production safety under the coal mine.
Five, the utility model has been realized the equal strength design of pick crown and pick body.
Equal strength design is meant that the denticle of pick wants intensity to equate with crown, that is: pick does not cause pick to lose efficacy because of denticle wearing and tearing too early cause crown to come off at work, or crown is too early weares and teares and cause the pick inefficacy, should make pick crown and pick body equal strength.Use structure of the present utility model, for different targets, select the major and minor tooth of different size can realize the equal strength design of pick.So the utility model has been realized the equal strength design of pick body and crown.
Description of drawings
Accompanying drawing 1 is a kind of common embedded right cylinder master tooth pick schematic diagram.
Accompanying drawing 2 is the main tooth pick of an a kind of common mushroom schematic diagram
Accompanying drawing 3 is a kind of common hat master tooth pick schematic diagram.
Accompanying drawing 5,6 has the pick structural representation that crown and end are higher than the secondary tooth of pick body front end face for the utility model.
Accompanying drawing 7 has the pick structural representation that folding wedge face land and end are higher than the secondary tooth of pick body front end face for the utility model.
Accompanying drawing 8,9 is the pick structural representation of the secondary tooth of a kind of single wedge surface land of the utility model.
Accompanying drawing 10 is provided with the pick structural representation that single wedge surface end is higher than the secondary tooth of pick body front end face for the utility model is a kind of.
Accompanying drawing 11 has the pick structural representation that crown and end are higher than the secondary tooth of pick body front end face for the utility model.
Accompanying drawing 12 is that the secondary tooth of the utility model is with the contrast schematic diagram of DE19821147A1 patent wear body to pick protection initial stage effect.
Accompanying drawing 13 is that the secondary tooth of the utility model is with the contrast schematic diagram of DE19821147A1 patent wear body to pick protection effect.
Accompanying drawing 14,15,16 is a kind of secondary toothing schematic diagram with crown of the utility model.
Accompanying drawing 17,18 is a kind of secondary toothing schematic diagram that has single wedge surface land of the utility model.
Accompanying drawing 19 is a kind of secondary toothing schematic diagram that has folding wedge face land of the utility model.
In the accompanying drawings: the end face of the front end face of 1 main tooth, 2 pick bodies, 3 secondary teeth, 4 wear body, 5 pick bodies, 6 pick body steps, 7 crowns, 8 lands, the wearing and tearing of 9 picks
The specific embodiment
As shown in drawings, the utility model is made of carbide alloy master tooth 1 and pick body 2, it is characterized in that on pick body 2 carbide alloy master tooth 1 around be provided with secondary tooth 3, described secondary tooth 3 ends are the crown 7 or the lands 8 that can participate in the work of cutting.The crown 7 of described secondary tooth 3 is coniform, mushroom or the long-pending shape that reduces gradually of the spherical uniform section of cambered surface.The land 8 of described secondary tooth 3 is single wedge surface land or folding wedge face land.The secondary tooth ends that has crown is higher than the front end face 5 of pick body.The secondary tooth ends that has a land and the front end face of pick body 5 are concordant or be higher than the front end face 5 of pick body.The diameter of described secondary tooth 3 and aspect ratio were greater than 1: 1.5---and 5.The peripheral pick body 2 of described main tooth 1 is provided with 3-50 secondary tooth 3, and the best is 6-20.Described secondary tooth 3 imbed the degree of depth in the pick body 2 greater than 1/3 of main tooth 1 length of embedment.Secondary tooth 3 imbed the degree of depth in the pick body 2 greater than 1/3 of main tooth 1 maximum gauge.The part that described secondary tooth 3 is imbedded pick body 2 is cylinder or Rotary-table.Fig. 5 is a kind of pick structure chart of the present utility model.Pick is made of carbide alloy master tooth 1, secondary tooth 3 and pick body 2, it is characterized in that the peripheral pick body 2 of carbide alloy master tooth 1 is provided with secondary tooth 3.
Secondary tooth of the present utility model is not simple cylinder or cone, but increases a crown or sword at cylinder or cone top, constitutes one and can carry out the secondary tooth of mining work.Secondary tooth points to target, can be set to according to the character of target: coniform, mushroom, cambered surface is spherical or wedge-like Figure 14 to 19.DE19821147A1 patent pick and invent the wear-resisting engineering pick of 200610102129.9 technical schemes, in order to arrange wear body, a pick body step 6 must appear on the pick body, this step produces huge resistance when pick is worked, the harm of this resistance is very big, the one, increased the load of equipment, cause impact, vibrations, damage equipment; The 2nd, increase energy consumption.Secondary tooth of the present utility model has just solved this problem.In the work, secondary tooth carries out fragmentation to material to be cut together with main tooth, and sharp-pointed secondary tooth is directly broken material to be cut can not produce the such resistance in entablement rank.According to result of the test, under same condition of work, use the consumption of the utility model pair tooth plant capacity only as DE19821147A1 patent pick and invent 50% of the wear-resisting engineering pick of 200610102129.9 technical schemes.
The peripheral pick body of the main tooth of the utility model is provided with 3-50 secondary tooth, and the best is 6-20.
The diameter d of secondary tooth 3 of the present utility model and height H can be according to the structures shape of main tooth, and secondary tooth diameter of the present utility model and aspect ratio are 1: 1.5---and 5, optimum value is 1: 2---4.The height of secondary tooth: for embedded main tooth, secondary tooth 3 is imbedded the ground degree of depth in the pick body 2 greater than 1/3 of the length of embedment of main tooth 1, and it is best for equaling the length of embedment of main tooth 1 that secondary tooth 3 is imbedded in the pick body 2 the ground degree of depth.Do not imbed or shallow embedding is gone into for hat master tooth, the height of described secondary tooth 3 should be greater than 1/3 of main tooth 1 maximum gauge.
Just for embedded main tooth, it is concordant that the length of its secondary tooth should be deep into basic and main tooth bottom, some case can a little more than or a little less than bottom the main tooth.For the flat hat crown of similar aforementioned DE19821147A1 patent example, the length of going deep into of secondary tooth should be more than 1/3 of main tooth bottom surface diameter.For example: embedded main tooth apolegamy diameter is the secondary tooth of 5mm, and length should be good between 10mm to 16mm.For example: shape for hat master tooth bottom surface diameter is 22mm, and then the length of secondary tooth should be at least 11mm, and it is good that secondary tooth diameter should be about 3mm to 5.5mm.Such structure has overcome the wear body of DE19821147A1 patent just for reducing the defective that the wearing and tearing of shoulder localized metallic are provided with: because in real work; pick is whole can to insert materials such as ore, sandstone; material can cause wearing and tearing to whole the first half of pick; this can lose support with regard to meaning than short because of the frayed loss of metal of its periphery and bottom with the less wear body of height diameter ratio; cause to come off, can not protect pick longer.
In an embedded crown real work case; main tooth diameter is 22mm; according to the utility model scheme adapted diameter is 6mm; length is the secondary tooth of 18mm; in the work; the axial length of exposure of secondary tooth has reached 15mm because denticle weares and teares, and still can protect the pick denticle effectively and participate in excacation.If adopt the proportion structure wear body of aforementioned DE19821147A1 patent scheme; obviously be inadequate; the pattern of this kind pick denticle wearing and tearing has been announced in the big factory of the pick commercial city of many employing shape for hat master teeth on its manual or product manual; from its result of the test that provides, the less wear body of short and height diameter ratio is not enough to the protection effect of pick body.
As accompanying drawing 5,6,7,8,9,10,11 respectively example be provided with the pick of multi-form major and minor tooth.Secondary tooth in the utility model no longer only is passive opposing wearing and tearing, can also participate in the broken and cutting work of material on one's own initiative.Such design can make the work insertion portion of pick more sharp-pointed, thereby reduces resistance and the vibrations that produce in the pick work.The pick of the cylindric wear body of employing as shown in Figure 4 and the comparison of the utility model pick shown in Figure 10: pick shown in Figure 4, shoulder is roomy; The secondary tooth wedge-shaped top of the utility model pick shown in Figure 10 has been eliminated the roomy shoulder of pick.In the coal mining real cases: the pick that adopts cylindrical wear body more similarly is in the hammering coal pieces at work, but not cutting; A large amount of dust that huge vibrations that it causes and hammering produce force work to be interrupted.And the pick that adopts the utility model to provide can efficiently fulfil assignment.Further, because the said structure of secondary tooth of the present utility model and its effective protective effect to the pick body utilize secondary tooth of the present utility model to eliminate the platform shoulder of pick fully.
Accompanying drawing 14 to 19 examples the concrete form of some secondary teeth, the cambered surface ball top (7) and the vertex of a cone (8) of secondary tooth make it can participate in cutting work, it no longer only is passive anti-wear component, in addition, these profiles have been eliminated the breakable square edge of cylinder among the existing German patent DE 19821147A1, and secondary tooth lower end can chamfering.
The end face of the secondary tooth of wedge-shaped top is a little more than the front end face 5 of pick body in the accompanying drawing 7,10.The inner cone end face of the end face of the secondary tooth of wedge-shaped top and pick body forms more level and smooth work plane in the accompanying drawing 8,9.
The utility model provides secondary tooth diameter and aspect ratio greater than 1:1.5---and 5 scheme, concrete ratio can determine that secondary tooth diameter that the utility model defines and height specific energy guarantee that it can be fixed on main tooth rim for more time and enclose according to different condition.Right cone formula master tooth pick as shown in Figure 6, elongated secondary tooth bottom are deep into basic and the same degree of depth in main tooth bottom.Say that more specifically the main tooth among the figure is imbedded pick body 15mm, according to the utility model scheme, 10mm to 16mm should be imbedded in secondary tooth bottom, and diameter should be about 5mm.
The pick of the shape for hat master tooth shown in the accompanying drawing 8,9,11, the length h of secondary tooth should be not less than 1/3 of main tooth base diameter D, and promptly D is 22mm among the figure, and the length h of secondary tooth should be not less than about 11mm, and diameter should be about 3mm to 5.5mm.The deficiency that has overcome DE19821147A1 that defines of the present utility model.This invention wear body is the short and thick circular cylinder body, is the metallic matrix for protection pick instrument shoulder.And in real work; pick is whole can to insert materials such as ore, sandstone; material can cause wearing and tearing to whole the first half of pick; this can lose support with regard to meaning than short because of the frayed loss of metal of its periphery and bottom with the less wear body of height diameter ratio; cause to come off, can not protect pick longer.
Accompanying drawing 12,13 examples the canonical process of pick wearing and tearing, for ease of contrast, the left and right sides shows the section of the pick of two kinds of different structures respectively among the figure.The outermost points at line is the profile before pick uses among the figure, and inboard solid line is the profile after wearing and tearing.The pick body progressively weares and teares in the course of the work, is the situation contrast of pick initial wear as shown in figure 12; When may wear to inboard solid line 10, the short and thick wear body that left side patent DE19821147A1 scheme is described can comparatively fast come off after periphery and bottom denticle wearing and tearing loss among Figure 13; And the secondary tooth of right side the utility model pick even may wear to shown position also can not come off, provides effective protection to the pick body because higher length and large-area weld seam can be fixed on main tooth rim more enduringly and enclose, and makes the life-span of pick more permanent.A kind of secondary toothing with crown of the utility model is shown in accompanying drawing 14,15,16.A kind of secondary toothing of single wedge surface land that has of the utility model is shown in accompanying drawing 17,18.The utility model is a kind of to be had shown in the secondary toothing accompanying drawing 19 of folding wedge face land.
Although this programme has only exemplified the form of several secondary teeth, apparent, secondary tooth can adopt other solid geometry shapes that are provided with point or sword, as: prism-shaped, rhombus sheet or polygon sheet etc.And the crown of secondary tooth also can be pyramid or other curve forms.
Claims (10)
1, a kind of coal mining and engineering pick, it is made of carbide alloy master tooth (1) and pick body (2), it is characterized in that being provided with secondary tooth (3) around the last carbide alloy master tooth (1) of pick body (2), described secondary tooth (3) end is the crown (7) or the land (8) that can participate in the work of cutting.
2, a kind of coal mining according to claim 1 and engineering pick is characterized in that the crown (7) of described secondary tooth (3) is the coniform or long-pending shape that reduces gradually of the spherical uniform section of cambered surface.
3, a kind of coal mining according to claim 1 and engineering pick, the land (8) that it is characterized in that described secondary tooth (3) is single wedge surface land or folding wedge face land.
4, a kind of coal mining and pick that engineering is used according to claim 2, the secondary tooth ends that it is characterized in that having crown is higher than the front end face (5) of pick body.
5, a kind of coal mining according to claim 3 and engineering pick, it is concordant with the front end face (5) of pick body or be higher than the front end face (5) of pick body to it is characterized in that having the secondary tooth ends of land.
6,, it is characterized in that the diameter of described secondary tooth (3) and aspect ratio were greater than 1: 1.5 to 1: 5 according to claim 1,2,3,4 or 5 described a kind of coal mining and engineering picks.
7,, it is characterized in that the peripheral pick body (2) of described main tooth (1) is provided with 3-50 secondary tooth (3) according to claim 1,2,3,4 or 5 described a kind of coal mining and engineering picks.
8, the pick of using according to claim 1,2,3,4 or 5 described a kind of coal minings and engineering, what it is characterized in that described secondary tooth (3) imbeds the interior degree of depth of pick body (2) greater than 1/3 of main tooth (1) length of embedment.
9, the pick of using according to claim 1,2,3,4 or 5 described a kind of coal minings and engineering, what it is characterized in that secondary tooth (3) imbeds the interior degree of depth of pick body (2) greater than 1/3 of main tooth (1) maximum gauge.
10,, it is characterized in that it is cylinder or Rotary-table that described secondary tooth (3) is imbedded the part of pick body (2) according to claim 1,2,3,4 or 5 described a kind of coal mining and engineering picks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202277447U CN201363145Y (en) | 2008-12-09 | 2008-12-09 | Cutting pick for coal mining and engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202277447U CN201363145Y (en) | 2008-12-09 | 2008-12-09 | Cutting pick for coal mining and engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201363145Y true CN201363145Y (en) | 2009-12-16 |
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ID=41473808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202277447U Expired - Fee Related CN201363145Y (en) | 2008-12-09 | 2008-12-09 | Cutting pick for coal mining and engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201363145Y (en) |
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2008
- 2008-12-09 CN CNU2008202277447U patent/CN201363145Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091216 Termination date: 20151209 |
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| EXPY | Termination of patent right or utility model |