CN116927794A - Cutting arm for grooving and grooving machine - Google Patents

Abstract

The present invention provides a grooving cutting arm and grooving machine, the grooving cutting arm including: an arm support; cutting picks arranged on the arm support, wherein a plurality of cutting picks are annularly distributed on the arm support; a hopper disposed on the arm support; the rotary power mechanism is used for driving the cutting pick and the arm support to rotate around the ring, and the technical problems of large difficulty in treatment of the floor heave of the coal mine tunnel and unsatisfactory treatment effect are solved.

Description

Cutting arm for grooving and grooving machine

Technical Field

The invention relates to the technical field of coal mining equipment, in particular to a cutting arm for grooving and a grooving machine.

Background

The floor heave is a common phenomenon in coal mine roadways, and has adverse effects on the production and safety of coal mine roadways, the roadway section can be reduced, transportation and pedestrians are hindered, mine ventilation is hindered, and the whole roadway can be scrapped in severe cases.

Currently, the method for treating the bottom drum mainly comprises the following steps:

(1) Floor anchor rod reinforcement prevents floor heaves, and is reinforced by using anchor rods on the floor of a roadway, but the roadway needs to be evaluated firstly; the control time is relatively short.

(2) Blasting pressure relief treatment of the bottom drum, wherein a rock loosening zone is formed in a coal bed bottom plate close to the periphery of a roadway through blasting, but the blasting parameters are needed when the method is adopted, and the rock properties and the thickness of the coal bed bottom plate are considered, so that the method is complex; explosive is used in the roadway, and the explosive has the risk of abnormal blasting, so that safety is not facilitated; and the effect of treating the bottom drum is not ideal by simply relying on blasting to release pressure.

(3) Grouting treatment and pressure relief of the bottom plate, loosening of the deep rock mass of the bottom plate by blasting, easy penetration of grouting slurry into gaps, filling and reinforcement, but high requirement on underground safety due to blasting; the reinforcement period is longer and the process is more complex.

(4) The concrete inverted arch is suitable for the bottom plate supporting measure of the permanent tunnel, and can be used together with the metal contractible bottom beam to obtain larger residual deformation resistance of the bottom plate for reinforcing the concrete inverted arch, but the thickness of the concrete inverted arch is not suitable to be larger than 600mm from the economical aspect.

In conclusion, the difficulty in treating the floor heave of the coal mine tunnel is relatively high, and the technical problem of unsatisfactory treatment effect exists.

Disclosure of Invention

The invention aims to provide a cutting arm for slotting and a slotting machine, which are used for solving the technical problems of relatively large difficulty in treating the floor heave of a coal mine roadway and unsatisfactory treatment effect.

The above object of the present invention can be achieved by the following technical solutions:

the present invention provides a cutting arm for grooving, comprising:

an arm support;

cutting picks arranged on the arm support, wherein a plurality of cutting picks are annularly distributed on the arm support;

a hopper disposed on the arm support;

and the rotary power mechanism is used for driving the cutting pick and the arm support to rotate around the ring.

In a preferred embodiment, the slotting cutter arm comprises a chain encircling the arm support, the pick and the hopper are both fixed to the outer surface of the chain, and the rotary power mechanism is connected with the chain to drive the chain to rotate.

In a preferred embodiment, a plurality of the picks are annularly distributed along the chain, and at least two of the picks are staggered in an axial direction of the chain.

In a preferred embodiment, the slotting cutter arm comprises a plurality of sets of the picks; at least two cutting picks in at least one group of cutting picks are staggered along the axial direction.

In a preferred embodiment, at least one set of the picks comprises a top pick, a plurality of first picks distributed along a first trajectory extending annularly from the top pick and offset axially outwardly, and a second pick distributed along a second trajectory extending annularly from the top pick and offset axially outwardly, the offset directions of the first and second trajectories being opposite.

In a preferred embodiment, the first picks and the second picks are alternately distributed along a circle.

In a preferred embodiment, at least one set of the picks includes a reinforcing pick, both the reinforcing pick and the top pick being disposed at axially intermediate positions.

In a preferred embodiment, the pick is tilted forward in the direction of rotation of the pick; the rear side of at least one of the picks is provided with the hopper.

In a preferred embodiment, the hopper comprises a receiving plate; the receiving plate extends along the axial direction and is obliquely arranged relative to the axial direction.

In a preferred embodiment, the inclination directions of the receiving plates of the adjacent two hoppers are opposite.

In a preferred embodiment, the stock plate on the rear side of the first pick is inclined to the rear side in the direction of deviation of the first trajectory line; the stock plate on the rear side of the second pick is inclined to the rear side in the direction of deviation of the second trajectory line.

In a preferred embodiment, the chain comprises a plurality of link plates, the cutting pick being secured to the link plates by a blade mount.

The present invention provides a grooving machine, comprising: the working platform and the slotting cutting arm are used for driving the slotting cutting arm to move back and forth.

The invention has the characteristics and advantages that:

this cutting arm for fluting can carry out tunnel bottom plate fluting, and this cutting arm for fluting extends to under the tunnel bottom plate and arranges for vertical direction slope, and this cutting arm for fluting drives forward motion under work platform, and in the feeding process, the pick strikes rock soil in order to cut the stratum, realizes mechanical fluting, carries out fluting release through mechanical fluting mode to the stress conduction way of cutting off the foundation drum, governs tunnel foundation drum, and the operation degree of difficulty is lower, and the operating efficiency is higher. In the grooving process, the hopper receives the rock stratum slag materials which are cut off, and in the upward movement stage, the hopper brings the rock stratum slag materials to the ground of a roadway, so that the slag materials are prevented from being left in the groove, the cleaning of the slag materials is facilitated on one hand, on the other hand, the grooving is facilitated by the grooving cutting arm, and the grooving efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a slotting cutter arm according to the present invention;

fig. 2 is a schematic structural view of a pick, a hopper and a chain in the slotting cutting arm provided by the invention;

FIG. 3 is an enlarged view of a portion at A in FIG. 2;

FIG. 4 is a schematic diagram of the slotting operation of the slotting cutter arm provided by the present invention;

FIG. 5 is a schematic view of a partial operation of a slotting cutter arm according to the present invention;

FIG. 6 is a schematic view of the distribution of picks of the slotting cutter arm provided by the present invention;

FIG. 7 is a schematic view of the slotting cutter arm of the present invention as viewed from within the slot;

fig. 8 is an enlarged view of a portion of the slotting cutter arm shown in fig. 7.

Reference numerals illustrate:

100. an arm support;

200. cutting pick; 201. a first trajectory line; 202. a second trajectory line; 203. slag materials; 204. a rock formation;

211. a first pick; 212. a second pick; 213. a top pick;

300. a hopper; 301. a receiving plate; 302. a support plate;

400. a chain; 401. a link plate; 402. a tool apron;

405. from the back to the front.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Scheme one

The present invention provides a slotting cutter arm, as shown in fig. 1-3, comprising: arm support 100, a rotation power mechanism, pick 200 provided to arm support 100, and hopper 300 provided to arm support 100; a plurality of picks 200 are annularly distributed on the arm support 100; the rotary power mechanism is used to drive the pick 200 and the arm support 100 to rotate about the ring.

The grooving cutting arm can be used for grooving the roadway bottom plate, as shown in fig. 4-5, extends below the roadway bottom plate and is obliquely arranged relative to the vertical direction, and moves forwards under the drive of the working platform, in the feeding process, the cutting pick 200 knocks rock soil to cut the rock stratum 204, so that mechanical grooving is realized, grooving pressure relief is carried out in a mechanical grooving mode, the stress conduction path of the foundation drum is cut off, the roadway foundation drum is treated, the operation difficulty is lower, and the operation efficiency is higher. In the slotting process, the hopper 300 receives the rock stratum 204 slag 203 which is cut off, and the hopper 300 brings the rock stratum 204 slag 203 to the ground of a roadway in an upward movement stage, so that the slag 203 is prevented from being left in the slot, on one hand, the clearance of the slag 203 is facilitated, on the other hand, the slotting is facilitated, and the slotting efficiency is improved.

In one embodiment, the slotted cutting arm includes a chain 400 encircling the arm support 100, the pick 200 and the hopper 300 are secured to an outer surface of the chain 400, and a rotary power mechanism is coupled to the chain 400 to drive the chain 400 in rotation. As shown in fig. 1 and 2, the chain 400 is in a ring shape, and the picks 200 and the hopper 300 rotate with the chain 400. Further, the arm support 100 is substantially rectangular, the chain 400 surrounds the arm support 100, the chain 400 is driven by the rotation power mechanism to rotate relative to the arm support 100, and the chain 400 drives the pick 200 and the hopper 300 to rotate on the arm support 100. The rotary power mechanism may be a hydraulic motor connected to one sprocket of the chain 400 to drive the sprocket to rotate, thereby driving the chain 400 and the pick 200 and the hopper 300 to rotate, and the hydraulic motor provides cutting power. In one embodiment, as shown in fig. 3, the chain 400 includes a plurality of link plates 401, and the picks 200 are mounted to the link plates 401 by tool holders 402.

Further, the plurality of cutting picks 200 are annularly distributed along the chain 400, at least two cutting picks 200 are staggered along the axial direction of the chain 400, the chain 400 drives the cutting picks 200 to rotate around the axis, the cutting picks 200 staggered along the axial direction cut different parts, slotting of a roadway bottom plate is achieved, the axial direction corresponds to the width of the slotted slot, and through the arrangement, the slotted width can be widened, slotting efficiency is improved, and abrasion of the cutting picks 200 is reduced.

In one embodiment, the grooving cutting arm includes a plurality of sets of picks 200; at least two picks 200 in at least one set of picks 200 are axially staggered, the picks 200 in the same set being capable of cutting different parts of the floor rock; during the annular rotation, each set of picks 200 cuts the rock, respectively, improving the efficiency of the cutting. The plurality of groups of picks 200 may be distributed along a circle to cyclically strike and cut rock, and the number and arrangement of picks 200 in each group may or may not be the same.

Further, the at least one set of picks 200 includes a top pick 213, a plurality of first picks 211 distributed along a first trajectory line 201, the first trajectory line 201 extending annularly from the top pick 213 and being offset axially outward, and a second pick 212 distributed along a second trajectory line 202, the second trajectory line 202 extending annularly from the top pick 213 and being offset axially outward, the offset directions of the first trajectory line 201 and the second trajectory line 202 being opposite. As shown in fig. 2 and 6-8, the first trajectory line 201 is deviated leftwards as shown in fig. 6, the second trajectory line 202 is deviated rightwards as shown in fig. 6, and a plurality of first picks 211 on the first trajectory line 201, second picks 212 on the second trajectory line 202 and top picks 213 respectively strike and cut different parts, so that the grooving efficiency is improved, the grooving width can be controlled through the left-right coverage of the first picks 211 and the second picks 212, in particular, the grooving width can be controlled by adjusting the number of picks 200, and when the grooving width needs to be increased, the number of picks 200 is appropriately increased to increase the furthest distance between the first picks 211 and the second picks 212, namely, the left-right coverage of the first picks 211 and the second picks 212 is enlarged; when the slot width needs to be reduced, then the number of picks 200 is suitably reduced.

Further, as shown in fig. 6, the first cutting teeth 211 and the second cutting teeth 212 are alternately distributed along the ring shape, that is, along a forward rotation direction of the ring shape, one first cutting tooth 211, one second cutting tooth 212, and another first cutting tooth 211 are sequentially arranged, and the first cutting tooth 211 and the second cutting tooth 212 are circularly distributed, so that the cutting teeth 200 are cooperatively and efficiently grooved in the rotation process.

In one embodiment, at least one set of picks 200 includes a reinforcing pick 200, the reinforcing pick 200 and the top pick 213 are both disposed at axially intermediate positions, and during rotation, the reinforcing pick 200 taps and cuts the same location as the top pick 213 to optimize grooving efficiency, reduce pick 200 wear, and extend pick 200 life. The reinforcing pick 200 may be disposed in front of the top pick 213.

In one embodiment, each set of picks 200 of the grooving cutting arm includes 10 picks 200, as shown in fig. 6, with the top pick 213 in the middle of the chain of picks 200, and the remaining picks 200 arranged according to certain parameters, wherein 5 first picks 211 are disposed on the first trajectory 201 and 4 first picks 211 are disposed on the second trajectory 202; the number and arrangement of picks 200 in each set of picks 200 in the grooving cutting arm are the same.

In another embodiment, the slotted cutting arm includes 4 sets of picks 200, each set including 15 picks 200 for a total of 60 picks 200.

In the cutting arm for grooving, the number of the cutting teeth 200 and the number of the cutting teeth 200 are arranged according to a specific requirement of grooving, and the cutting teeth are not limited to 60 cutting teeth 200 in total of 4 groups or to 10 or 15 cutting teeth 200 in each group.

Typically, the number of picks 200 in each set is related to the slot width, with the number of picks 200 per set increasing as the slot width increases. The number of sets of picks 200 is typically determined by the size of the overall arm support 100, and as the arm support 100 becomes larger, the number of sets of picks 200 increases accordingly. In designing the grooving cutting arm, firstly, the arrangement of each group of picks 200 is determined according to the grooving width. As shown in fig. 6, when the slot width is determined, the width of the link plate 401 can be determined. The spacing between each pick 200 is determined by calculation to meet the continuity of the cutting of the formation 204 by the pick 200 without the occurrence of a free cut or a no cut. Meanwhile, the abrasion rate of each cutting pick 200 is ensured to be close to each other in the use process, and the service life of the cutting pick 200 is prolonged as far as possible. Next, the number of sets of picks 200 is determined based on the arm support 100 dimensions.

The grooving cutting arm shown in fig. 6-8 is in the form of a single tooth, i.e., no overlapping picks 200 are axially located, and all picks 200 are strung in a loop. However, the slotting cutting arm may also be in a double-tooth or multi-tooth form, that is, two or more cutting picks 200 may overlap in the axial direction, and the arrangement of the cutting picks 200 and the hopper 300 may correspond to the actual working conditions.

In some embodiments, the pick 200 is tilted forward in the direction of rotation of the pick 200; the rear side of at least one cutting pick 200 is provided with a hopper 300, as shown in fig. 2-5, the cutting pick 200 rotates forwards along the rotation direction, and the top end of the cutting pick 200 inclines forwards, so that the knocking force of the cutting pick 200 on the rock stratum 204 is more concentrated, and the cutting efficiency is improved; the cut slag 203 falls onto the hopper 300 at the rear side and is carried out to the ground, thereby being beneficial to ensuring the slotting effect.

When the pick 200 cuts the formation 204, the angled magazine 300 contacts the formation 204 to form a space. Slag 203 generated by the previous pick 200 cutting the formation 204 falls into the following hopper 300 and is eventually discharged. As shown in fig. 7, the left and right sides of the chain arm are both the rock layer 204, and during the actual grooving operation, the cutting pick 200 strikes the rock layer 204 and brings slag 203 out through the hopper 300, thereby forming a groove. The picks 200 interact with the formation 204 and slag 203 resulting from the breaking of the formation 204 falls into the subsequent hopper 300. As can be seen, the formation 204 on both sides and one side of the hopper 300 form a "concave" space that is used to hold the slag 203 and eventually drain as the chain 400 runs.

As shown in fig. 3, hopper 300 includes a receiving plate 301, receiving plate 301 being capable of receiving the rock slag 203 being cut. Further, the receiving plate 301 extends along the axial direction and is inclined relative to the axial direction, as shown in fig. 7-8, the receiving plate 301 is inclined relative to the axial direction, which is beneficial to guiding the slag 203 falling onto the receiving plate 301 to roll outwards, so that the slag 203 falls onto the outside of the slot, and is convenient to collect and clean. Preferably, the inclined directions of the receiving plates 301 of two adjacent hoppers 300 are opposite to guide the slag 203 to fall to both sides of the slot, avoiding too much accumulation of the slag 203 on one side.

Further, the stock plate 301 on the rear side of the first pick 211 is inclined to the rear side in the deviating direction of the first trajectory line 201; the stock plate 301 on the rear side of the second pick 212 is inclined to the rear side in the direction of deviation of the second trajectory line 202, the first trajectory line 201 is deviated to the left as shown in fig. 6 and 8, the second trajectory line 202 is deviated to the right, the pick 200 is rotated from the rear-to-front direction 405 at the time of grooving, the stock plate 301 on the rear side of the first pick 211 also passes through the first trajectory line 201 and is inclined to the rear side in the left direction, so that the slag 203 is guided to the left side; the stock receiving plate 301 on the rear side of the second pick 212 also passes through the second trajectory line 202 and is inclined to the rear side in a rightward direction, thereby guiding the slag 203 to the right.

A support plate 302 may be provided at the rear side of the receiving plate 301 to support the receiving plate 301, thereby improving the strength of the hopper 300. The support plate 302 and the receiving plate 301 may be mounted on the link plate 401 by welding.

Scheme II

The present invention provides a groover, comprising: the working platform and the slotting cutting arm are used for driving the slotting cutting arm to move back and forth. After the slotting cutting arm extends below the roadway bottom plate and is obliquely arranged relative to the vertical direction, the working platform drives the slotting cutting arm to move forwards so as to realize feeding, and in the feeding process, the cutting pick 200 knocks rock soil so as to cut the rock stratum 204, so that mechanical slotting is realized. The grooving machine has the technical characteristics and beneficial effects of the grooving cutting arm, and is not described herein.

In one embodiment, the work platform comprises a vehicle, which may be a crawler or a tire vehicle.

The foregoing is merely a few embodiments of the present invention and those skilled in the art may make various modifications or alterations to the embodiments of the present invention in light of the disclosure herein without departing from the spirit and scope of the invention.

Claims (13)

1. A cutting arm for slotting, comprising:

an arm support;

cutting picks arranged on the arm support, wherein a plurality of cutting picks are annularly distributed on the arm support;

a hopper disposed on the arm support;

and the rotary power mechanism is used for driving the cutting pick and the arm support to rotate around the ring.

2. The slotting cutter arm of claim 1 wherein,

the slotting cutting arm comprises a chain encircling the arm support, the pick and the hopper are both fixed on the outer surface of the chain, and the rotary power mechanism is connected with the chain to drive the chain to rotate.

3. The slotting cutter arm as claimed in claim 2 wherein,

the cutting picks are annularly distributed along the chain, and at least two cutting picks are staggered along the axial direction of the chain.

4. The slotting cutter arm of claim 1 wherein,

the slotting cutting arm comprises a plurality of groups of cutting picks;

at least two cutting picks in at least one group of cutting picks are staggered along the axial direction.

5. The slotting cutter arm as claimed in claim 4 wherein,

at least one set of the picks includes a top pick, a plurality of first picks distributed along a first trajectory line extending annularly from the top pick and offset axially outward, and a second pick distributed along a second trajectory line extending annularly from the top pick and offset axially outward, the offset directions of the first and second trajectory lines being opposite.

6. The slotting cutter arm as claimed in claim 5 wherein,

the first picks and the second picks are alternately distributed along a ring.

7. The slotting cutter arm as claimed in claim 5 wherein,

at least one set of the picks includes a reinforcing pick, both the reinforcing pick and the top pick being disposed at an axially intermediate position.

8. The slotting cutter arm as claimed in claim 5 wherein,

the cutting pick is inclined forwards along the rotation direction of the cutting pick;

the rear side of at least one of the picks is provided with the hopper.

9. The slotting cutter arm as claimed in claim 8 wherein,

the hopper comprises a receiving plate; the receiving plate extends along the axial direction and is obliquely arranged relative to the axial direction.

10. The slotting cutter arm of claim 9 wherein,

the inclination directions of the material receiving plates of two adjacent hoppers are opposite.

11. The slotting cutter arm of claim 9 wherein,

the stock plate on the rear side of the first pick is inclined to the rear side along the deviating direction of the first track line;

the stock plate on the rear side of the second pick is inclined to the rear side in the direction of deviation of the second trajectory line.

12. The slotting cutter arm as claimed in claim 2 wherein,

the chain comprises a plurality of chain plates, and the cutting pick is fixed on the chain plates through a cutter holder.

13. A groover, comprising: a work platform and the slotting cutter arm of any one of claims 1-12, the work platform being adapted to move the slotting cutter arm back and forth.