CN110439557B - Installation process of scraper loader with damping and buffering device - Google Patents
Installation process of scraper loader with damping and buffering device Download PDFInfo
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- CN110439557B CN110439557B CN201910581717.2A CN201910581717A CN110439557B CN 110439557 B CN110439557 B CN 110439557B CN 201910581717 A CN201910581717 A CN 201910581717A CN 110439557 B CN110439557 B CN 110439557B
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- 238000013016 damping Methods 0.000 title claims abstract description 70
- 230000003139 buffering effect Effects 0.000 title claims abstract description 36
- 238000011900 installation process Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000035939 shock Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 4
- 238000005516 engineering process Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 4
- 230000005641 tunneling Effects 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 239000010878 waste rock Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/04—Safety devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/20—General features of equipment for removal of chippings, e.g. for loading on conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Dampers (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention relates to a scraper loader with a damping and buffering device and an installation process thereof, and the scraper loader comprises a pulley and a winch, wherein a trolley is arranged below the winch, a first guide wheel A is arranged on the right side of a support rod, the damping and buffering device A is arranged above the first guide wheel A, the pulley is arranged above the damping and buffering device A, a rope groove is formed in the pulley, the pulley is connected with a pin shaft, the pin shaft is connected with a support, a base is arranged below the support, a damping pad is arranged above the right side of the base, a fixing cover is arranged above the damping pad, a damping spring is arranged below the base, a bottom plate is arranged below the damping spring, the impact force of scraper loader and motor speed regulation and gear shifting on a steel wire rope is reduced, the damage of the broken rope and rope skipping of the steel wire rope is effectively reduced, and the existing scraper loader is easily upgraded, the invention has the advantages of scientific and reasonable structure, safe and convenient use and worth of popularization.
Description
Technical Field
The invention belongs to the technical field of coal mining equipment, and particularly relates to an installation process of a damping and buffering device of a raking machine.
Background
The rock raking machine is called a scraper loader and a rock raking machine. The scraper loader is mainly used for loading operation by matching a mine car or a skip in the tunneling of engineering roadways such as coal mines, metallurgical mines, tunnels and the like, and is a major device for improving the tunneling speed and realizing the tunneling mechanization. The device can be used in a drift, an inclined drift with an inclination angle smaller than 30 degrees or a drift with a turning angle reaching 90 degrees, and can also be used for performing parallel operation of a tunneling process, so that the tunneling speed is improved. The electric equipment has explosion-proof performance and can be used in mines with coal dust and gas. The host machine part of the waste rock raking machine adopts the planetary gear transmission, and has the characteristics of high rock loading efficiency, simple structure, good reliability, convenient operation, wide application range and the like. The gangue raking machine is provided with a pneumatic cart cylinder, and after the mine car is filled, the heavy car can be pushed out by the pneumatic cart cylinder, so that the labor intensity of workers is reduced, the shunting time is shortened, and the tunneling speed is increased.
The scraper loader has the characteristics of strong loading capacity, simple structure, high use efficiency and good adaptability, and is widely used on a coal mine excavation working face. However, in the use process, due to the fact that the power of the winch is large, the impact force of raking operation and motor speed regulation and gear shifting on the steel wire rope is large, and meanwhile, the design structure of the guide wheel of the raking machine is unreasonable, potential safety hazards such as rope skipping and rope breakage are prone to occurring in the actual use process of the steel wire rope, and therefore the raking machine damping and buffering device and the installation process thereof are provided.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
The invention aims to provide a mounting method of a damping and buffering device, which is simple in structure and reasonable in design and can effectively prevent the hazards of rope skipping and rope breakage of a scraper loader, so as to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: a mounting process of a scraper loader with a damping and buffering device comprises a pulley and a winch, wherein a trolley is arranged below the winch, a second guide wheel A is arranged above the right side of the winch, a second guide wheel B is arranged on the right side of the second guide wheel A, an intermediate tank is arranged above the winch, a discharge chute is connected to the right side of the intermediate tank, a feed chute is connected to the left side of the intermediate tank, a main rope is connected to the left side of the feed chute, a scraper bucket is connected to the left side of the main rope, a tail rope is connected to the left side of the scraper bucket, a tail wheel is arranged above the left side of the scraper bucket, a fixed wedge is connected to the left side of the tail wheel, an adjusting plate is mounted on the right side of the discharge chute, a discharge opening is arranged at the middle bottom of the discharge chute, a supporting rod is mounted on the right side of the discharge opening, a first guide wheel A is arranged on the right side of the supporting rod, a first guide wheel B is arranged on the right side of the first guide wheel A, the winch is characterized in that a damping and buffering device A is arranged above the first guide wheel A, a damping and buffering device B is installed on the right side of the damping and buffering device A, a pulley is arranged above the damping and buffering device A, a rope groove is formed in the pulley, the pulley is connected with a pin shaft, the pin shaft is connected with a support, a base is arranged below the support, a damping pad is arranged above the right side of the base, a fixing cover is arranged above the damping pad, a damping spring is installed below the base, a bottom plate is installed below the damping spring, and the winch comprises a driving roller and an auxiliary roller.
Further, the damping springs are provided with 4 damping springs.
Further, the included angle between the adjusting plate and the discharge opening is 0-90 degrees.
Further, the rope groove is provided with 2 circles in total.
Further, the adjusting plate is fixedly connected with the damping and buffering device A and the damping and buffering device B through bolts.
Further, the fixed cover is of a hollow cuboid structure.
Further, the damping spring, the base and the bottom plate are connected through welding.
Furthermore, the bottom of the adjusting plate is rotatably connected with the discharge chute through a pin shaft, and the top of the adjusting plate is movably connected with the discharge chute through a bolt.
The invention also discloses an installation process of the waste rock raking machine with the damping and buffering device, which comprises the following steps:
firstly, after the parts are detected, drilling a hole on the upper part of the head, installing a fixed wedge, placing one end of a steel wire rope sleeve ring belt taper sleeve into the drilled hole when the fixed wedge is installed, and then inserting and striking a tight wedge, wherein the hole for installing the fixed wedge has a deflection angle of 5-7 degrees with a working surface.
And step two, adjusting the included angle between the adjusting plate and the discharge opening according to the actual situation of the gangue raking operation.
And step three, releasing the braking of the driving roller, drawing the main rope out of the driving roller, penetrating the main rope from the upper part of the second guide wheel A, then penetrating the right side of the first guide wheel A, then winding a circle on a pulley of the damping and buffering device A, and then sequentially following the discharge chute, the middle chute and the feed chute and finally being connected with the head part of the scraper bucket.
And step four, the auxiliary roller is released for braking, the tail rope is drawn out of the auxiliary roller, penetrates through the upper part of the second guide wheel B, then penetrates through the right side of the first guide wheel B, and then is wound on a pulley of the damping and buffering device B for a circle, penetrates through the tail wheel and is connected with the tail part of the scraper bucket.
And step five, hanging the tail pulley on a steel wire rope sleeve ring, wherein the hanging and pulling of the tail pulley depends on the condition of the roadway and is generally hung at a dispatching position of 800-1000 mm above the head-facing rock pile.
And step six, after the tail pulley is installed, adjusting the main rope and the tail rope to proper pressure through a winch, performing trial operation for 10 minutes, and starting formal operation when no problem exists in the trial operation.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the adjusting plate, the damping buffer device A and the damping buffer device B, reduces the impact force of the raking operation and the speed regulation and gear shifting of the motor on the steel wire rope, effectively reduces the damage of rope breaking and rope skipping of the steel wire rope, is easy to upgrade and reform the existing raking machine, has low cost, has scientific and reasonable structure, is safe and convenient to use, and is worthy of popularization.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the right-view structure of the present invention;
FIG. 2 is an enlarged schematic view of a shock absorbing and cushioning device A of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is a schematic view of the pulley configuration of the present invention;
in the figure: 1-tail pulley, 2-scraper bucket, 3-feed chute, 4-middle chute, 5-tail rope, 6-discharge chute, 7-discharge opening, 8-damping buffer device A, 9-first guide pulley A, 10-adjusting plate, 11-supporting rod, 12-second guide pulley A, 13-winch, 14-trolley, 15-main rope, 16-fixed wedge, 17-pulley, 1701-rope chute, 18-bracket, 19-base, 20-damping pad, 21-fixed cover, 22-damping spring, 23-bottom plate, 24-pin shaft, 25-first guide pulley B, 26-second guide pulley B, 27-driving roller, 28-auxiliary roller and 29-damping buffer device B.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: a mounting process of a scraper loader with a damping buffer device comprises a pulley 17 and a winch 13, wherein a trolley 14 is arranged below the winch 13, a second guide wheel A12 is arranged above the right side of the winch 13, a second guide wheel B26 is arranged on the right side of a second guide wheel A12, an intermediate trough 4 is arranged above the winch 13, a discharge chute 6 is connected to the right side of the intermediate trough 4, a feed chute 3 is connected to the left side of the intermediate trough 4, a main rope 15 is connected to the left side of the feed chute 3, a scraper bucket 2 is connected to the left side of the main rope 15, a tail rope 5 is connected to the left side of the scraper bucket 2, a tail wheel 1 is arranged above the left side of the scraper bucket 2, a fixed wedge 16 is connected to the left side of the tail wheel 1, an adjusting plate 10 is arranged on the right side of the discharge chute 6, a discharge opening 7 is arranged at the middle bottom of the discharge opening 7, a support rod 11 is arranged on the right side of the support rod 11, a first guide wheel A9 is arranged on the right side of the support rod 11, a first guide wheel A9 is provided with a first guide wheel B25, damping buffer A8 is arranged above first guide wheel A9, damping buffer B29 is installed on the right side of damping buffer A8, damping buffer A8 is provided with pulley 17, the last grooving 1701 that is provided with of pulley 17, pulley 17 is connected with round pin axle 24, round pin axle 24 is connected with support 18, support 18 below is provided with base 19, base 19 right side top is provided with shock pad 20, shock pad 20 top is provided with fixed cover 21, damping spring 22 is installed to base 19 below, bottom plate 23 is installed to damping spring 22 below, winch 13 is including initiative cylinder 27 and auxiliary drum 28.
In this embodiment, the damping springs 22 are 4, and they are all damping springs, so that the pressure on the main rope 15 and the tail rope 5 caused by the speed regulation and gear shifting of the motor and the gangue raking operation can be damped and buffered.
In this embodiment, the included angle of regulating plate 10 and discharge opening 7 is 0-90 degrees, can be according to the operational environment, adjusts suitable included angle and obtains better shock attenuation shock-absorbing cushioning performance.
In this embodiment, the rope groove 1701 is provided with 2 turns in total, and the main rope 15 and the tail rope 5 are prevented from being tangled.
In this embodiment, the adjusting plate 10 is fixedly connected to the shock absorbing and buffering device A8 and the shock absorbing and buffering device B29 by bolts.
In this embodiment, fixed cover 21 is hollow cuboid structure, dustproof waterproof, extension equipment life.
In this embodiment, the damping spring 22 is connected with the base 19 and the bottom plate 23 by welding, which requires special reinforcement, and the connection is more reliable and the use is longer.
In this embodiment, the bottom of regulating plate 10 is connected through round pin axle and 6 rotations of blowpit, and the top of regulating plate 10 passes through bolt and 6 swing joint of blowpit, can adjust suitable contained angle and obtain better shock attenuation shock-absorbing cushioning properties according to the in-service use condition.
The installation process of the raking machine with the damping and buffering device in the embodiment comprises the following steps:
after the detection of all parts is completed, firstly drilling a hole at the upper part of the head, installing the fixed wedge 16, placing one end of the steel wire rope sleeve ring belt taper sleeve into the drilled hole when installing the fixed wedge 16, then inserting and striking the tight wedge, wherein the hole for installing the fixed wedge 16 has an offset angle of 5-7 degrees with the working face, and thus the fixed wedge is not easy to pull out.
And step two, adjusting the included angle between the adjusting plate 10 and the discharge opening 7 according to the actual situation of the gangue raking operation so that the equipment can obtain better buffering and damping performance.
And step three, the driving roller 27 is released for braking, the main rope 15 is drawn out of the driving roller 27, penetrates through the upper part of the second guide wheel A12, then penetrates through the right side of the first guide wheel A9, and then winds around the pulley 17 of the damping buffer device A8 for a circle, and then sequentially follows the discharge chute 6, the middle chute 4 and the feed chute 3, and finally is connected with the head part of the scraper bucket 2, the pressure of the motor speed regulation and gear shifting and scraper waste rock operation on the steel wire rope is very large, after winding a circle on the pulley 17 of the damping buffer device A8, the damping buffer effect can be effectively increased, and meanwhile, the harm caused by rope breakage and rope skipping of the steel wire rope can be reduced.
And fourthly, the auxiliary roller 28 is loosened for braking, the tail rope 5 is drawn out of the auxiliary roller 28, passes through the upper part of the second guide wheel B26, passes through the right side of the first guide wheel B25, passes through the tail wheel 1 after being wound for one circle on the pulley 17 of the damping buffer device B29, and is connected with the tail part of the scraper bucket 2, the pressure of the motor speed regulation and gear shifting and waste rock raking operation on the steel wire rope is very large, the damping buffer effect can be effectively increased after the pulley 17 of the damping buffer device A8 is wound for one circle, and meanwhile, the harm caused by rope breakage and rope skipping of the steel wire rope can be reduced.
And step five, hanging the tail wheel 1 on a steel wire rope lantern ring, wherein the hanging and pulling of the tail wheel is determined according to the condition of a roadway and is generally hung at a dispatching position of 800-1000 mm above a head rock pile, so that the left-right hanging position is moved to rake the coal gangue at the center and two sides in order to reduce auxiliary labor and improve the gangue raking efficiency and meet the condition of coal gangue pile.
And step six, after the tail pulley 1 is installed, adjusting the main rope 15 and the tail rope 5 to proper pressure through the winch 13, performing trial operation for 10 minutes, and starting formal operation when no problem exists in the trial operation.
The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. The utility model provides an installation technology of harrow cash machine with shock attenuation buffer which characterized in that: the scraper loader comprises a pulley (17) and a winch (13), wherein a trolley (14) is arranged below the winch (13), a second guide wheel A (12) and a second guide wheel B (26) are arranged above the right side of the winch (13), the second guide wheel A (12) and the second guide wheel B (26) are arranged oppositely, a middle groove (4) is arranged above the winch (13), a discharge chute (6) is connected to the right side of the middle groove (4), a feed chute (3) is connected to the left side of the middle groove (4), a main rope (15) is connected to the left side of the feed chute (3), a scraper bucket (2) is connected to the left side of the main rope (15), a tail rope (5) is connected to the left side of the scraper bucket (2), a tail wheel (1) is arranged above the left side of the scraper bucket (2), a fixed wedge (16) is connected to the left side of the tail wheel (1), an adjusting plate (10) is arranged on the right side of the discharge chute (6), the bottom is provided with discharge opening (7) in the middle of discharge chute (6), the contained angle of regulating plate (10) and discharge opening (7) is 0-90 degrees, the bottom of regulating plate (10) is connected with discharge chute (6) through round pin axle rotation, and the top of regulating plate (10) passes through bolt and discharge chute (6) swing joint, bracing piece (11) is installed on discharge opening (7) right side, bracing piece (11) right side is provided with first leading wheel A (9) and first leading wheel B (25), first leading wheel A (9) and first leading wheel B (25) set up relatively, be provided with shock attenuation buffer A (8) and shock attenuation buffer B (29) above first leading wheel A (9), shock attenuation buffer A (8) and shock attenuation buffer B (29) set up relatively, shock attenuation buffer A (8) top is provided with pulley (17), a rope groove (1701) is formed in the pulley (17), the pulley (17) is connected with a pin shaft (24), the pin shaft (24) is connected with a support (18), a base (19) is arranged below the support (18), a shock absorption pad (20) is arranged above the right side of the base (19), a fixed cover (21) is arranged above the shock absorption pad (20), a shock absorption spring (22) is arranged below the base (19), a bottom plate (23) is arranged below the shock absorption spring (22), and the winch (13) comprises a driving roller (27) and an auxiliary roller (28);
the mounting process comprises the following specific steps:
firstly, after the detection of all parts is finished, drilling a hole on the upper part of the head, installing a fixed wedge (16), placing one end of an annular taper sleeve of a steel wire rope sleeve into the drilled hole when the fixed wedge (16) is installed, inserting a tight wedge and knocking tightly, wherein the hole for installing the fixed wedge (16) has a deflection angle of 5-7 degrees with a working surface;
secondly, adjusting the included angle between the adjusting plate (10) and the discharge opening (7) according to the actual situation of the gangue raking operation;
thirdly, braking of the driving roller (27) is released, the main rope (15) is drawn out of the driving roller (27), passes through the upper part of the second guide wheel A (12), then passes through the right side of the first guide wheel A (9), then winds around the pulley (17) of the damping and buffering device A (8) for one circle, and then sequentially follows the discharge chute (6), the middle chute (4) and the feeding chute (3) and is finally connected with the head part of the scraper bucket (2);
step four, the auxiliary roller (28) is released for braking, the tail rope (5) is drawn out of the auxiliary roller (28), passes through the upper part of the second guide wheel B (26), passes through the right side of the first guide wheel B (25), winds around the pulley (17) of the damping and buffering device B (29) for one circle, passes through the tail wheel (1) and is connected with the tail part of the scraper bucket (2);
hanging the tail pulley (1) on a steel wire rope sleeve ring and at a dispatching position of 800-1000 mm above the head-facing rock pile;
and step six, after the tail pulley (1) is installed, adjusting the main rope (15) and the tail rope (5) to proper pressure through a winch (13), performing trial operation for 10 minutes, and starting formal operation when no problem exists in the trial operation.
2. The installation process of the raking machine provided with the damping and buffering device as claimed in claim 1, wherein the damping and buffering device comprises the following steps: the damping springs (22) are provided with 4 damping springs.
3. The installation process of the raking machine provided with the damping and buffering device as claimed in claim 1, wherein the damping and buffering device comprises the following steps: the rope groove (1701) is provided with 2 circles in total.
4. The installation process of the raking machine provided with the damping and buffering device as claimed in claim 1, wherein the damping and buffering device comprises the following steps: the adjusting plate (10) is fixedly connected with the damping and buffering device A (8) and the damping and buffering device B (29) through bolts.
5. The installation process of the raking machine provided with the damping and buffering device as claimed in claim 1, wherein the damping and buffering device comprises the following steps: the fixed cover (21) is of a hollow cuboid structure.
6. The installation process of the raking machine provided with the damping and buffering device as claimed in claim 1, wherein the damping and buffering device comprises the following steps: the damping spring (22) is connected with the base (19) and the bottom plate (23) through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581717.2A CN110439557B (en) | 2019-06-30 | 2019-06-30 | Installation process of scraper loader with damping and buffering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581717.2A CN110439557B (en) | 2019-06-30 | 2019-06-30 | Installation process of scraper loader with damping and buffering device |
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| Publication Number | Publication Date |
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| CN110439557A CN110439557A (en) | 2019-11-12 |
| CN110439557B true CN110439557B (en) | 2021-10-15 |
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| CN201910581717.2A Active CN110439557B (en) | 2019-06-30 | 2019-06-30 | Installation process of scraper loader with damping and buffering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111576415A (en) * | 2020-06-06 | 2020-08-25 | 河南航天建筑工程有限公司 | Piling device for constructional engineering |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2644667Y (en) * | 2003-09-12 | 2004-09-29 | 新疆维吾尔自治区第三机床厂 | Safety device of wax removal winch for oil well |
| CN2719388Y (en) * | 2004-08-31 | 2005-08-24 | 王楚桥 | Dodge, balance and buffer type rake device for drum even-mixing material-taking machine |
| CN202273682U (en) * | 2011-09-23 | 2012-06-13 | 山东科技大学 | Lift type rake bucket rock loader |
| US9404363B2 (en) * | 2013-08-30 | 2016-08-02 | Joy Mm Delaware, Inc. | Proximity detection systems and methods |
| CN208135788U (en) * | 2017-05-17 | 2018-11-23 | 龚家红 | A kind of material elevator for building |
| CN109250637A (en) * | 2018-08-16 | 2019-01-22 | 中国船舶重工集团公司第七〇九研究所 | Buffer unit applied to loop wheel machine wirerope |
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| CN110439557A (en) | 2019-11-12 |
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