CN102251771A - Tunneling and drilling integrated machine - Google Patents
Tunneling and drilling integrated machine Download PDFInfo
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- CN102251771A CN102251771A CN2011101410226A CN201110141022A CN102251771A CN 102251771 A CN102251771 A CN 102251771A CN 2011101410226 A CN2011101410226 A CN 2011101410226A CN 201110141022 A CN201110141022 A CN 201110141022A CN 102251771 A CN102251771 A CN 102251771A
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Abstract
The invention discloses a tunneling and drilling integrated machine which comprises a tunneling machine (1) and two drilling machines (2), wherein each drilling machine (2) comprises a drilling machine part (22) and a mounting frame (21); the two drilling machines (2) are respectively connected on two track frames (11) on two sides of the tunneling machine (1) through the mounting frames (21); and in each drilling machine (2), the drilling machine part (22) is rotatably connected with the mounting frame (21) in a horizontal plane and the drilling machine part (22) can rotate around the front end of the mounting frame (21) in a vertical plane of the length direction is located. Therefore, the drilling machine parts can rotate up and down and swing left and right relative to the mounting frames; the angle and the height of drilling can be adjusted through the relative motion of the drilling machine parts and the mounting frames during the drilling operation, the drilling machines are mounted on the track frames of the tunneling machine and the drilling operation of the drilling machines can be realized without the help of a cutting arm of the tunneling machine; and the drilling machine parts can be rotated and retracted backwards during the tunneling operation and the occupied space can be further reduced.
Description
Technical field
The present invention relates to the mining machinery technical field, relate in particular to a kind of pick and bore all-in-one.
Background technology
Usually need get out 100 millimeters of about 15 diameters at preceding section before the high gas tunnelling, the degree of depth reaches more than 20 meter gas and takes out (row) discharge hole, initial this work is finished by the monomer liquid drilol press fully, in the course of the work, the monomer liquid drilol press must be used alternatingly with development machine, cause the operating efficiency of tunnelling very low, labour intensity is big, operates also danger close.
Along with the development of mining machinery technology, the tunnelling exploitation combines with the gas probing, and all-in-one is bored in the pick that has produced development machine and rig combination gradually.Please refer to Fig. 1, Fig. 1 is the structural representation that all-in-one is bored in pick in the prior art, briefly introduces this pick below and bores the course of work of all-in-one and the defective of existence thereof.
As shown in Figure 1, this pick is bored all-in-one and is comprised development machine and rig, rig comprise installing rack 2 ' and rig portion 3 ', the cutting arm 1 of installing rack 2 ' be located at development machine ' on, rig portion 3 ' be slidingly connected with installing rack 2 ' front and back.During work, the cutting arm 1 of development machine ' about under the effect of development machine pumping plant hydraulic coupling, swing, rig thereupon about, swing, thereby adjust the punching height and the punching angle of this rig so that find suitable punch position.This pick is bored all-in-one and is had installation, operation, advantage such as easy to maintenance, and has alleviated labour intensity, has improved operating efficiency.
Yet, because the rig portion 3 of rig ' be located at all the time above the cutting units of development machine, the rig portion 3 of rig ' can only with the cutting arm 1 of development machine ' the motion campaign, cause the range limited system of probing, can not drill too high or too low hole, and the motion underaction of the relative development machine of rig, convenient inadequately in the installation and removal process, the scope of application also is restricted.
Therefore, how on the basis of existing technology, improve the concrete structure that all-in-one is bored in existing pick, make the probing scope of rig bigger, and rig is flexible with respect to the motion of development machine, and installation and removal are convenient, are the present urgent problems of those skilled in the art.
Summary of the invention
The technical problem to be solved in the present invention is bored all-in-one for a kind of pick is provided, and the probing scope of its rig is bigger, and rig is flexible with respect to the motion of development machine, and installation and removal are convenient.
For solving the problems of the technologies described above, the invention provides a kind of pick and bore all-in-one, comprise development machine and two rigs, described rig comprises rig portion and installing rack; Two described rigs are connected on two track frames of described development machine both sides by described installing rack; Described rig portion and described installing rack are rotatably connected in horizontal plane, and described rig portion can rotate around described installing rack front end in the vertical plane at its length direction place.
Preferably, also comprise hydraulically powered slew gear, described rig portion and described installing rack are rotatably connected in horizontal plane by described slew gear; Also be included in pitching oil cylinder flexible in the described vertical plane, described pitching oil cylinder two ends are connected to the leading section of described installing rack, the bottom of described slew gear.
Preferably, described slew gear comprises worm gear and the housing that is rotationally connected, and described worm gear connects described rig portion, and described housing connects described installing rack; The described worm gear outside also is provided with and its engaged worm, and the end of described worm screw is connected with hydraulic motor.
Preferably, be provided with Connection Block between described installing rack and the described rig portion; One hinged by vertical bearing pin in the two of described Connection Block one end and described installing rack, described rig portion, its other end and another person in the two pass through hinged perpendicular to the horizontal bearing pin of fore-and-aft direction.
Preferably, described installing rack is a telescopic arm structure, and described telescopic arm structure comprises that first segment arm and telescopically are set in the joint of second in described first segment arm leading section arm, and described rig portion is connected in the leading section of the described second joint arm.
Preferably, telescopically is set with the 3rd joint arm in the leading section of the described second joint arm, and described rig portion is connected in the leading section of described the 3rd joint arm.
Preferably, also be included in hoist cylinder flexible in the vertical plane; Described hoist cylinder one end is connected with described track frame, and its other end is connected with described installing rack bottom.
Preferably, also comprise column, when described rig was in running order, the top of described column and described rig portion removably connected, and described column bottom support is in ground.
All-in-one is bored in pick provided by the present invention, and two rig is connected on the track frame of development machine both sides by installing rack; Rig portion and installing rack are rotatably connected in horizontal plane, and rig portion can rotate around the installing rack front end in the vertical plane at its length direction place.
Adopt the pick of this structure to bore all-in-one, rig portion can rotate up and down with respect to installing rack, and can swing; When pick brill all-in-one carries out bore operation, can adjust the angle and the height of boring by rig portion to the relative motion of installing rack, to reach best boring effect, all-in-one only bores with the pick that the cutting arm of development machine moves in middle compared to existing technology rig portion, and rig portion can drill higher or lower hole; Rig is installed on the track frame of development machine, make the drilling operation of rig can not rely on the cutting arm of development machine and realize, promptly when rig is worked, can make the cutting units of development machine land motionless, the only rotation up and down by rig portion, swing, reaching suitable bore angle and drillhole height, thereby strengthened the work independence of rig, and saved the space of the cutting arm top of development machine, made development machine can carry out tunnelling more freely; When pick brill all-in-one carried out excavation operation, rig portion can rotate withdrawal backward, further reduces the rig occupation space, makes its installation and removal all convenient.
This shows, the rig portion that the rig of all-in-one is bored in above-mentioned pick can move more flexibly and easily, increased the scope of rig probing and the flexibility of development machine driving, made that the installation and removal process of rig is convenient, and have the advantages that to save the space.
Description of drawings
Fig. 1 is the structural representation that all-in-one is bored in pick in the prior art;
Fig. 2 is the front view that a kind of specific embodiment of all-in-one is bored in pick provided by the present invention;
Fig. 3 is the vertical view of Fig. 2;
Structural representation when Fig. 4 is in retracted state for rig among Fig. 2;
Fig. 5 is the structural representation of the rig among Fig. 2;
Fig. 6 is the structural representation of a kind of specific embodiment of the slew gear among Fig. 2;
Fig. 7 is the structural representation of the another kind of specific embodiment of rig portion among Fig. 2 and installing rack junction.
Wherein, Reference numeral among Fig. 1 and the corresponding relation between the component names are: 1 ' cutting arm; 2 ' installing rack; 3 ' rig portion;
Reference numeral and the corresponding relation between the component names among Fig. 2 to Fig. 7 are: 1 development machine; 11 track frames; 2 rigs; 21 installing racks; 22 rig portions; 23 slew gears; 24 pitching oil cylinders; 25 Connection Blocks; 26 hoist cylinders; 27 columns; 28 balladeur train bodies; 211 first segment arms; 212 second joint arms; 213 the 3rd joint arms; 231 worm gears; 232 worm screws; 233 housings; 234 hydraulic motors; 251 vertical bearing pins; 252 horizontal bearing pins.
The specific embodiment
Core of the present invention is bored all-in-one for a kind of pick is provided, and the probing scope that all-in-one is bored in this pick is bigger, and rig is flexible with respect to the motion of development machine, and it is less to take up room, and its installation and removal process is more convenient.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2, Fig. 3 and Fig. 4, Fig. 2 is the front view that a kind of specific embodiment of all-in-one is bored in pick provided by the present invention; Fig. 3 is the vertical view of Fig. 2; Structural representation when Fig. 4 is in retracted state for rig among Fig. 2.
In a kind of concrete embodiment, as shown in the figure, pick provided by the present invention is bored all-in-one and is comprised development machine 1 and two rigs 2, and development machine 1 is that the equipment of being responsible for tunnelling in the all-in-one is bored in pick, and rig 2 is that the equipment of being responsible for boring in the all-in-one is bored in pick; Rig 2 comprises rig portion 22 and installing rack 21, installing rack 21 is located at the rear portion of rig 2, it is the fixed part of rig 2, its by bolt on two track frames 11 of development machine 1 both sides, rig portion 22 is parts that rig 2 is responsible for boring, rig portion 22 is rotatably connected in horizontal plane with installing rack 21, and rig portion 22 can rotate around installing rack 21 front ends in the vertical plane at its length direction place.
Adopt the pick of this structure to bore all-in-one, rig portion 22 can rotate up and down with respect to installing rack 21, and can swing; When pick brill all-in-one carries out bore operation, can adjust the angle and the height of boring by the relative motion of 22 pairs of installing racks 21 of rig portion, to reach best boring effect, all-in-one only bores with the pick that the cutting arm 11 of development machine 1 moves in middle compared to existing technology rig portion 22, and rig portion 22 can drill higher or lower hole; Rig 2 is installed on the track frame 11 of development machine 1, make the drilling operation of rig 2 can not rely on the cutting arm 11 of development machine 1 and realize, promptly when rig 2 work, can make the cutting units of development machine 1 land motionless, the only rotation up and down by rig portion 22, swing, to reach suitable bore angle and drillhole height, thereby strengthened the work independence of rig 2, and saved the space of cutting arm 11 tops of development machine 1, made development machine 1 can carry out tunnelling more freely; When pick brill all-in-one carried out excavation operation, rig portion 22 can rotate withdrawal backward, further reduces rig 2 occupation space, makes its installation and removal all convenient.
This shows, the rig portion 22 that the rig 2 of all-in-one is bored in above-mentioned pick can move more flexibly and easily, increased the scope of rig 2 probings and the flexibility of development machine 1 driving, made that the installation and removal process of rig 2 is convenient, and have the advantages that to save the space.
Need to prove; do not limit the specific constructive form that rig portion 22 and installing rack 21 are rotationally connected in the above-mentioned specific embodiment; do not limit the specific constructive form of installing rack 21 yet; in fact; everyly comprise two rigs 2 that are installed on the track frame 11, and the pick that can rotate up and down, swing of the rig portion 22 of rig 2 and installing rack 21 is bored all-in-one and is all belonged in protection scope of the present invention.
What specify is; the noun of locality of Chu Xianing " preceding " refers to the direction that all-in-one driving and probing are bored in pick herein; it is dextrosinistral direction among Fig. 2; " back " is then opposite; it is from left to right direction among Fig. 2; setting up of they is that accompanying drawing with herein is that benchmark is set up, and should be appreciated that their appearance should not influence protection scope of the present invention.
The specific constructive form that is rotatably connected of above-mentioned rig portion 22 and installing rack 21 can also further be set.
Please refer to Fig. 5 and Fig. 6, Fig. 5 is the structural representation of the rig among Fig. 2; Fig. 6 is the structural representation of a kind of specific embodiment of the slew gear among Fig. 2.
In the another kind of specific embodiment, as shown in Figure 5, above-mentioned rig 2 can comprise hydraulically powered slew gear 23, and rig portion 22 is rotatably connected in horizontal plane by this slew gear 23 with installing rack 21; Also be included in pitching oil cylinder 24 flexible in the vertical plane, the leading section of pitching oil cylinder 24 two ends difference connection frame 21, the bottom of slew gear 23.
Adopt this structure, when pitching oil cylinder 24 stretches out forward, can drive rig portion 22 and rotate up, pitching oil cylinder 24 is when after-contraction, can drive rig portion 22 and be rotated down, thereby realized that rig portion 22 can rotate around installing rack 21 front ends in the vertical plane at its length direction place.
In the concrete scheme, as shown in Figure 6, above-mentioned slew gear 23 can comprise worm gear 231 and housing 233, and worm gear 231 connects rig portion, housing 233 connection framves, and worm gear 231 and housing 233 are rotationally connected; Worm gear 231 outsides also are provided with and its engaged worm 232, and the end of worm screw 232 is connected with hydraulic motor 234.
Adopt this form of structure, open hydraulic motor 234, making it drive worm screw 232 rotates, worm screw 232 drives worm gear 231 rotations with its engagement, thereby driving the rig portion 22 that is connected with worm gear 231 rotates with respect to housing 233, because housing 233 is connected with the installing rack 21 of rig 2, thereby realized that rig portion 22 connects with respect to the revolution of installing rack 21 in horizontal plane; Bore the rig 2 end probing work of all-in-one when pick after, can utilize slew gear 23 that 22 rotations of rig portion are regained, make rig portion 22 and installing rack 21 folding placements.
By this connected mode, can realize that rig portion is connected with the revolution of installing rack in horizontal plane, and have characteristics such as simple in structure, convenient processing and manufacture.
Certainly, above-mentioned slew gear 23 is not limited to this mode, can also be other modes.For example slew gear 23 comprises that first gear and housing 233, the first gears that are rotationally connected connect rig portion 22, housing 233 connection framves 21; First gear outside also is provided with second gear with its engagement, and the power transmission shaft of second gear is connected with hydraulic motor 234.Like this, open hydraulic motor 234, making it drive second gear rotates, first gear of second gear driven and its engagement rotates, thereby driving rig portion 22 rotates with respect to housing 233, because housing 233 is connected with the installing rack 21 of rig 2, thereby realized that rig portion 22 connects with respect to the revolution of installing rack 21 in horizontal plane.
In the another kind of specific embodiment, please refer to Fig. 7, Fig. 7 is the structural representation of the another kind of specific embodiment of rig portion among Fig. 2 and installing rack junction; As shown in the figure, above-mentioned rig 2 can also comprise Connection Block 25, Connection Block 25 is located between installing rack 21 and the rig portion 22, and Connection Block 25 1 ends and installing rack 21 be by hinged perpendicular to the horizontal bearing pin 252 of fore-and-aft direction, and it is hinged that its other end and rig portion 22 pass through vertical bearing pin 251.
Adopt the Connection Block 25 of this structure, can realize in horizontal plane, being rotatably connected, and rig portion 22 can rotate around described installing rack 21 front ends in the vertical plane at its length direction place with above-mentioned installing rack 21 and rig portion 22.The Connection Block 25 of this structure has characteristics simple in structure, convenient processing and manufacture.Certainly, balladeur train body 28 can also be set, make Connection Block 25 be connected in the front end of installing rack 21, make installing rack 21 more stable, dismantle more convenient with being connected of rig portion 22 by balladeur train body 28.
The specific constructive form of above-mentioned installing rack 21 can also further be set.
In the another kind of specific embodiment, as shown in Figures 2 and 3, above-mentioned installing rack 21 can be telescopic arm structure, telescopic arm structure comprises the second joint arm 212 that first segment arm 211 and relative first segment arm 211 are elastic, the second joint arm 212 is set in the leading section of first segment arm 211, and rig portion 22 is connected in the leading section of the second joint arm 212.
Adopt this structure, by the second joint arm 212 first segment arm 211 in to preceding elongation or shorten backward, can regulate the position of rig portion 22, so that rig portion 22 adjusts to the bore position of the best at fore-and-aft direction.
Further in the scheme, telescopically is set with the 3rd joint arm 213 in the leading section of the second joint arm 212, and rig portion 22 is connected in the leading section of the 3rd joint arm 213.Like this, on the basis of the first segment arm 211 and the second joint arm 212, can further increase the distance that rig portion 22 extends forward or shorten backward, play the effect of better adjustment bore position by the 3rd elongation and the shortening that saves arm 213.
Certainly, above-mentioned installing rack 21 is not limited to the form of structure of telescopic arm, can also be other form of structure, for example installing rack 21 can be made as the form that is slidingly connected of slide block and guide rail, rig portion 22 is connected on the slide block, can regulates the particular location of rig portion 22 equally at fore-and-aft direction.
The concrete connected mode of the track frame 11 of above-mentioned installing rack 21 and development machine 1 both sides can also further be set.
In the another kind of specific embodiment, as shown in Figure 2, above-mentioned rig 2 can also comprise hoist cylinder 26, and hoist cylinder 26 elongates or shortens in vertical plane, and the one end is connected with track frame 11, and its other end is connected with installing rack 21 bottoms.
Adopt such structure, drive hoist cylinder 26 and make its movable end elongation, the installing rack 21 that can drive rig 2 upwards lifts, thereby raise the position of installing rack 21 front end rig portions 22, driving hoist cylinder 26 shortens its movable end, installing rack 21 positions that can drive rig 2 descend, thereby reduce the position of rig portion 22.This shows, adopt the structure of hoist cylinder 26, can further strengthen the kinematic dexterity of the rig portion 22 of rig 2, make its height of adjusting boring more easily and angle, strengthened the operation flexibility of rig portion 22.
Above-mentioned rig 2 can also comprise column 27, and when rig 2 was in running order, the top of column 27 and rig portion 22 removably connected, and the bottom support of column 27 is in ground.
Adopt this structure, above-mentioned rig portion 22 in the course of the work, except the supporting role that is subjected to installing rack 21, can also be subjected to the support force of column 27, played the effect of temporary lining, avoid its rig portion 22 in boring procedure, to rock, strengthened rig portion 22 stability at work because of vibrations cause.Here do not limit the mode that specifically removably connects of column 27 and rig portion 22, can adopt modal bolt to connect, certainly, can also be other connected mode.
More than all-in-one bored in a kind of pick provided by the present invention be described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. all-in-one is bored in a pick, comprises development machine (1) and two rigs (2), and described rig (2) comprises rig portion (22) and installing rack (21); It is characterized in that two described rigs (2) are connected on two track frames (11) of described development machine (1) both sides by described installing rack (21); Described rig portion (22) is rotatably connected in horizontal plane with described installing rack (21), and described rig portion (22) can rotate around described installing rack (21) front end in the vertical plane at its length direction place.
2. all-in-one is bored in pick according to claim 1, it is characterized in that, also comprises hydraulically powered slew gear (23), and described rig portion (22) is rotatably connected in horizontal plane by described slew gear (23) with described installing rack (21); Also be included in pitching oil cylinder (24) flexible in the described vertical plane, described pitching oil cylinder (24) two ends are connected to the bottom of the leading section of described installing rack (21), described slew gear (23).
3. all-in-one is bored in pick according to claim 2, it is characterized in that, described slew gear (23) comprises worm gear (231) and the housing (233) that is rotationally connected, and described worm gear (231) connects described rig portion (22), and described housing (233) connects described installing rack (21); Described worm gear (231) outside also is provided with and its engaged worm (232), and the end of described worm screw (232) is connected with hydraulic motor (234).
4. all-in-one is bored in pick according to claim 1, it is characterized in that, is provided with Connection Block (25) between described installing rack (21) and the described rig portion (22); One hinged by vertical bearing pin (251) in the two of described Connection Block (25) one ends and described installing rack (21), described rig portion (22), its other end and another person in the two pass through hinged perpendicular to the horizontal bearing pin (252) of fore-and-aft direction.
5. all-in-one is bored in each described pick according to claim 1-4, it is characterized in that, described installing rack (21) is a telescopic arm structure, described telescopic arm structure comprises that first segment arm (211) and telescopically are set in the second joint arm (212) in described first segment arm (211) leading section, and described rig portion (22) is connected in the leading section of the described second joint arm (212).
6. all-in-one is bored in pick according to claim 5, it is characterized in that, telescopically is set with the 3rd joint arm (213) in the leading section of the described second joint arm (212), and described rig portion (22) is connected in the leading section of described the 3rd joint arm (213).
7. all-in-one is bored in each described pick according to claim 1-4, it is characterized in that, also is included in hoist cylinder (26) flexible in the vertical plane; Described hoist cylinder (26) one ends are connected with described track frame (11), and its other end is connected with described installing rack (21) bottom.
8. all-in-one is bored in each described pick according to claim 1-4, it is characterized in that, also comprise column (27), when described rig (2) is in running order, the top of described column (27) and described rig portion (1) removably connect, and described column (27) bottom support is in ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101410226A CN102251771A (en) | 2011-05-27 | 2011-05-27 | Tunneling and drilling integrated machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101410226A CN102251771A (en) | 2011-05-27 | 2011-05-27 | Tunneling and drilling integrated machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102251771A true CN102251771A (en) | 2011-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101410226A Pending CN102251771A (en) | 2011-05-27 | 2011-05-27 | Tunneling and drilling integrated machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102251771A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141456A (en) * | 2014-07-01 | 2014-11-12 | 中煤科工集团西安研究院有限公司 | Large mining height gas extracting caterpillar drill for coal mine gallery |
| CN105370294A (en) * | 2015-12-01 | 2016-03-02 | 中国矿业大学 | Drilling type boring machine |
| CN109209425A (en) * | 2018-11-01 | 2019-01-15 | 黄山市徽州安华工程机械有限公司 | Full angle digs drilling anchor integral type development machine |
| CN111577273A (en) * | 2020-05-16 | 2020-08-25 | 项英华 | Coal mining device |
| CN113309517A (en) * | 2021-05-10 | 2021-08-27 | 凯盛重工有限公司 | Multifunctional lifting arm for tunneling and anchoring integrated machine |
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| CN201092855Y (en) * | 2007-10-12 | 2008-07-30 | 郭满红 | Coal slack group-drill tapping machine |
| CN201137496Y (en) * | 2008-01-03 | 2008-10-22 | 石家庄煤矿机械有限责任公司 | Tunnelling machine mounted geophysical drilling machine |
| CN201225153Y (en) * | 2008-04-22 | 2009-04-22 | 闫振东 | Rock lane digging and supporting construction drill |
| CN201363087Y (en) * | 2009-02-27 | 2009-12-16 | 浦国树 | Gassy outburst mine coal-road tunneling outburst-proof drill loader with dual drilling machine and dual pump station |
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| US4653810A (en) * | 1985-11-08 | 1987-03-31 | Adam Roger F J | Pre-bolting system for underground mines |
| CN1178566A (en) * | 1996-01-30 | 1998-04-08 | 日立建机株式会社 | Swing type hydraulic excavator |
| DE19620499A1 (en) * | 1996-05-22 | 1997-11-27 | Henneke Johannes Prof Dr Ing | Tunnelling machine with swinging cutter head |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141456A (en) * | 2014-07-01 | 2014-11-12 | 中煤科工集团西安研究院有限公司 | Large mining height gas extracting caterpillar drill for coal mine gallery |
| CN105370294A (en) * | 2015-12-01 | 2016-03-02 | 中国矿业大学 | Drilling type boring machine |
| CN109209425A (en) * | 2018-11-01 | 2019-01-15 | 黄山市徽州安华工程机械有限公司 | Full angle digs drilling anchor integral type development machine |
| CN111577273A (en) * | 2020-05-16 | 2020-08-25 | 项英华 | Coal mining device |
| CN111577273B (en) * | 2020-05-16 | 2021-07-27 | 项英华 | Coal mining device |
| CN113309517A (en) * | 2021-05-10 | 2021-08-27 | 凯盛重工有限公司 | Multifunctional lifting arm for tunneling and anchoring integrated machine |
| CN113309517B (en) * | 2021-05-10 | 2022-08-23 | 凯盛重工有限公司 | Multifunctional lifting arm for tunneling and anchoring integrated machine |
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Application publication date: 20111123 |