CN103114808A - Arch centering pipe shed drilling machine - Google Patents
Arch centering pipe shed drilling machine Download PDFInfo
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- CN103114808A CN103114808A CN2013100654237A CN201310065423A CN103114808A CN 103114808 A CN103114808 A CN 103114808A CN 2013100654237 A CN2013100654237 A CN 2013100654237A CN 201310065423 A CN201310065423 A CN 201310065423A CN 103114808 A CN103114808 A CN 103114808A
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- wheel
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- bow member
- walking
- girder
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Abstract
The invention discloses an arch centering pipe shed drilling machine which comprises an arch centering and a drilling work mechanism. The upper portion of the arch centering is in a semicircle structure, a hydraulic supporting leg and a drilling machine traveling mechanism are arranged on two sides at the bottom of the arch centering, a lifting arm moving platform is arranged on the upper portion of the arch centering, the drilling work mechanism is supported on the lifting arm moving platform through a front lifting arm and a rear lifting arm which are fixed on the upper portion of a moving platform main beam, a main traveling wheel system is arranged on the lower portion of the main beam, side supporting wheel systems are arranged on side faces of the front lifting arm and the rear lifting arm respectively, and main traveling wheels and side supporting wheels travel on H-shaped steel. The arch centering pipe shed drilling machine is safe, reliable, high in adaptivity to construction environment, convenient to process and manufacture and capable of effectively improving construction efficiency and lowering construction cost.
Description
Technical field
The present invention relates to a kind of underground construction with pipe canopy rig, relate in particular to a kind of bow member pipe canopy rig.
Background technology
At present, along with the sustainable development of infrastructure, a large amount of tunnels and city underground engineering project construction will be had.Pipe canopy advance support in underground engineering construction effectively water seepage prevention, control ground settlement, improve weak surrounding rock stratum self-stable ability.Because pre-buried Shed-pipe Advanced Support is done top board and side wall support, for follow-up tunnel excavation has been established solid foundation, and construct fast, safe, the duration is short, is considered in soft rock construction to solve the stratum from steady the most rational the most effective job practices.
Pipe canopy rig is the visual plant that the pre-grouting pipe is installed, pipe roof construction equipment of the prior art is mainly the substitute of easy rig or similar devices, as anchoring drilling machine etc., the problem of existence is mainly that workload is large, automaticity is low, Construction precision control is difficult etc.
Summary of the invention
The purpose of this invention is to provide a kind of safe and reliable, construction environment strong adaptability, convenient processing and manufacture, bow member pipe canopy rig that efficiency of construction is high.
The objective of the invention is to be achieved through the following technical solutions:
Bow member pipe canopy rig of the present invention, comprise bow member and creep into operating mechanism, the top of described bow member is semicircular structure, the both sides of the bottom of described bow member are provided with hydraulic leg and walking mechanism, the top of described bow member is provided with the lift arm mobile platform, and the described operating mechanism of creeping into is supported on described lift arm mobile platform by front lift arm and rear lift arm;
The outer ring of described bow member is comprised of H shaped steel, and described lift arm mobile platform comprises girder, and described front lift arm and rear lift arm are fixed in the top of described girder, and the bottom of described girder is provided with main walking wheel, and described main walking wheel walks on described H shaped steel;
The side of described front lift arm and rear lift arm is respectively equipped with the side supporting wheel systems, and described side supporting wheel systems walks on described H shaped steel.
As seen from the above technical solution provided by the invention, the bow member pipe canopy rig that the embodiment of the present invention provides, reasonable in design, safe and reliable, construction environment strong adaptability, convenient processing and manufacture can effectively improve efficiency of construction and reduce construction cost.
Description of drawings
The side structure schematic diagram of the bow member pipe canopy rig that Fig. 1 a provides for the embodiment of the present invention;
The Facad structure schematic diagram of the bow member pipe canopy rig that Fig. 1 b provides for the embodiment of the present invention;
Fig. 2 is the structural representation of drilling machine operating mechanism in the embodiment of the present invention;
Fig. 3 a is the side structure schematic diagram of front and back lift arm in the embodiment of the present invention;
Fig. 3 b is the Facad structure schematic diagram of front and back lift arm in the embodiment of the present invention;
Fig. 4 a is the Facad structure schematic diagram of lift arm mobile platform in the embodiment of the present invention;
Fig. 4 b is the side structure schematic diagram of lift arm mobile platform in the embodiment of the present invention;
Fig. 5 a is the side structure schematic diagram of walking mechanism in the embodiment of the present invention;
Fig. 5 b is the Facad structure schematic diagram of walking mechanism in the embodiment of the present invention.
The specific embodiment
The below will be described in further detail the embodiment of the present invention.
Bow member pipe canopy rig of the present invention, its better specific embodiment is:
Comprise bow member and creep into operating mechanism, the top of described bow member is semicircular structure, described bow member bottom is provided with hydraulic leg and rig walking mechanism, the top of described bow member is provided with the lift arm mobile platform, and the described operating mechanism of creeping into is supported on described lift arm mobile platform by front lift arm and rear lift arm;
The outer ring of described bow member is made of H shaped steel, and described lift arm mobile platform comprises girder, and described front lift arm and rear lift arm are fixed in the top of described girder, and the bottom of described girder is provided with main walking wheel, and described main walking wheel walks on described H shaped steel;
The side of described front lift arm and rear lift arm is respectively equipped with the side supporting wheel systems, and described side supporting wheel systems walks on described H shaped steel.
Described main walking wheel comprises two upper road wheel, a lower road wheel and side support wheels, described upper road wheel is along the top flange outer surface walking of described H shaped steel, described lower road wheel is along the top flange inner surface walking of described H shaped steel, and described side support wheel is along the surface walking of described H shape steel web.
Described main walking wheel is connected with motor-driven system, described motor-driven system comprises hydraulic motor and intermeshing sprocket wheel, chain, described hydraulic motor is connected on described girder, described sprocket wheel is fixed on the output shaft of described hydraulic motor, and described chain is fixed on the inner surface of described H shaped steel bottom flange.
Described side supporting wheel systems comprises supporting cylinder, side connecting rod, sidewinders driving wheel, the middle part that one end of described hydraulic cylinder is articulated on described front lift arm or rear lift arm, the other end is articulated in described side connecting rod, described side connecting rod one end is articulated on described girder, other end installation side roller.
Described drilling machine operating mechanism comprises nose girder, unit head, drilling rod and drilling tool, described nose girder is provided with drill pipe clamp, the front end of described nose girder is provided with centre head, the bottom of described nose girder by adpting flange be connected hinged seat and described front lift arm be connected lift arm and be connected, be provided with vertical fine setting hydraulic cylinder between one of them adpting flange and described nose girder, described unit head is connected on nose girder by hydraulic cylinder-chain-sprocket transmission device.
Described front lift arm and rear lift arm comprise lead, and described lead comprises inner prop and column jacket, and the inside of described inner prop is provided with lifting hydraulic cylinder.
Described rig walking mechanism comprises road wheel, walking wheel carrier, walking rotating mechanism, bearing pin and motor transmission system.Described road wheel is the two-wheel edge wheel, and walking is supported at the rail of bottom; The walking wheel carrier connects road wheel and rotating mechanism, and the support motor transmission system; The road wheel rotating mechanism can realize road wheel in length and breadth to rotation, thereby pipe canopy drill carriage is moved along the work plane vertical and horizontal.Bearing pin is used for fixing relatively rotating of walking wheel carrier and road wheel rotating mechanism; Motor transmission system provides power for walking mechanism.
Also comprise control system and hydraulic power unit, described control system and hydraulic power unit are positioned on the connecting cross beam of bottom of described bow member, and described control system comprises electrical control system and hydraulic control system.
Bow member pipe canopy rig of the present invention can be used for tunnel and city underground engineering construction, and reasonable in design, safe and reliable, construction environment strong adaptability, convenient processing and manufacture can effectively improve efficiency of construction and reduce construction cost.
Specific embodiment:
As shown in Fig. 1 a, Fig. 1 b, comprise that creeping into operating mechanism 1, front and back lift arm 2, lift arm mobile platform 3, bow member 4, hydraulic leg 5, rig walking mechanism 6, control system and hydraulic power unit 7 forms.
As shown in Figure 2, drilling machine operating mechanism 1 by unit head 101, drilling rod and drilling tool 102, hydraulic cylinder-chain-sprocket transmission device 103, drill pipe clamp 104, centre head 105, unit head nose girder 106, nose girder adpting flange 107, the first hinged seat 108, hydraulic cylinder vertically finely tuned by nose girder and Connection Block 109 forms.Unit head provides rotation and feeding power for creeping into; Drilling rod and drilling tool are realized creeping into of Guan Peng hole, can change it according to different stratum; Hydraulic cylinder-chain-sprocket transmission device is arranged in unit head nose girder casing, is mainly the power that unit head provides feeding and retreats; Drill pipe clamp is used for the righting drilling rod in borer drilling procedure, and with the unit head coordinated movement of various economic factors, realize docking between drilling rod, disengaging, drill bit dismounting etc.; Centre head holds out against the work section when rig is worked; The unit head nose girder is used for supporting motive force head and provide motion guide for it; Lift arm is connected with the unit head nose girder with the first hinged seat by former and later two nose girder adpting flanges, and unit head nose girder lower limb is embedded in the nose girder adpting flange, and fixes with bearing pin and nose girder adpting flange; Nose girder is vertically finely tuned hydraulic cylinder one end and is connected with the unit head nose girder, and the other end is connected with the nose girder adpting flange, finely tunes the flexible of hydraulic cylinder by nose girder, and the unit head nose girder is slided with respect to the nose girder adpting flange.
As shown in Fig. 3 a, Fig. 3 b, front and back lift arm 2 is comprised of the second hinged seat 201, lead 202, lift arm hydraulic cylinder and hinged seat 203 thereof.The second hinged seat is connected with the first hinged seat 108; Lead is comprised of inner prop and column jacket; Lift arm hydraulic cylinder and hinged seat thereof are contained in the interior column space of lead.The front and back lift arm is regulated radial dimension and the elevation angle size of creeping into operating mechanism.
As shown in Fig. 4 a, Fig. 4 b, lift arm mobile platform 3 is comprised of lift arm mobile platform girder 301, lift arm mobile platform master walking wheel 302, motor-driven system 303, lift arm side supporting wheel systems 304.Lift arm mobile platform girder is box-type section, former and later two lift arms is connected as a whole, and lift arm mobile platform top connects former and later two lift arms, and the bottom connects the lift arm platform two main walking wheels of cover.One cover lift arm mobile platform master walking wheel is comprised of two upper road wheels, lower road wheel, side support wheel and link thereof, wherein going up road wheel walks along H shaped steel top flange, bow member outer ring outer surface, lower road wheel is along the walking of H shaped steel top flange, bow member outer ring inner surface, and the side support wheel is along bow member outer ring H shape steel web surface walking.Motor-driven system is comprised of hydraulic motor, sprocket wheel, chain, hydraulic motor is connected on lift arm platform girder by fixed support, sprocket wheel is fixed on the output shaft of hydraulic motor, chain is fixed on the inner surface of H shaped steel bottom flange, bow member outer ring by pressing plate, the motor output shaft rotation, with the movement in a curve of movable sprocket along chain and bow member, thus by the whole lift arm platform of motor driving along the bow member movement in a curve.The linkage that lift arm side supporting wheel systems is comprised of hydraulic cylinder, side connecting rod, side roll wheel, hydraulic cylinder one end are articulated on lift arm guiding column jacket, and the other end is articulated in the middle part of the side connecting rod; Side connecting rod one end is articulated on lift arm mobile platform girder, other end installation side roller.During the work of pipe canopy rig, hydraulic cylinder stretches out and drives the side connecting rod, and side wheel is pressed in H shaped steel top flange, bow member outer ring external surface, is used for firmly managing the whole superstructure of canopy rig.
Bow member 4 is formed by shaped steel and Plate Welding, and bow member top is semicircular structure, and the bottom is connected by crossbeam, and H shaped steel bottom flange, bow member outer ring inner surface is fixed with chain.
Hydraulic leg 5 is fixed on the two ends of bow member bottom girder, and when rig was worked, hydraulic leg stretched out and supports on the ground.
As shown in Fig. 5 a, 5b, rig walking mechanism 6 realizes that the vertical and horizontal of whole pipe canopy rig move, and mainly is comprised of road wheel 601, walking wheel carrier 602, road wheel rotating mechanism 603, bearing pin 604, motor transmission system 605.Road wheel is the two-wheel edge wheel, and walking is supported at the rail of bottom; The walking wheel carrier connects road wheel and rotating mechanism, and the support motor transmission system; The road wheel rotating mechanism can realize road wheel in length and breadth to rotation, thereby pipe canopy drill carriage is moved along the work plane vertical and horizontal.Bearing pin is used for fixing relatively rotating of walking wheel carrier and road wheel rotating mechanism; Motor transmission system provides power for walking mechanism.
Control system and hydraulic power unit 7 are positioned on the bottom connecting cross beam of bow member, and control system comprises electrical control and hydraulic control system.
The above; only for the better specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. bow member pipe canopy rig, it is characterized in that, comprise bow member and creep into operating mechanism, the top of described bow member is semicircular structure, the both sides of the bottom of described bow member are provided with hydraulic leg and walking mechanism, the top of described bow member is provided with the lift arm mobile platform, and the described operating mechanism of creeping into is supported on described lift arm mobile platform by front lift arm and rear lift arm;
The outer ring of described bow member is provided with H shaped steel, and described lift arm mobile platform comprises girder, and described front lift arm and rear lift arm are fixed in the top of described girder, and the bottom of described girder is provided with main walking wheel, and described main walking wheel walks on described H shaped steel;
The side of described front lift arm and rear lift arm is respectively equipped with the side supporting wheel systems, and described side supporting wheel systems walks on described H shaped steel.
2. bow member pipe canopy rig according to claim 1, it is characterized in that, described main walking wheel comprises two upper road wheel, a lower road wheel and side support wheels, described upper road wheel is along the top flange outer surface walking of described H shaped steel, described lower road wheel is along the top flange inner surface walking of described H shaped steel, and described side support wheel is along the surface walking of described H shape steel web.
3. bow member pipe canopy rig according to claim 2, it is characterized in that, described main walking wheel is connected with motor-driven system, described motor-driven system comprises hydraulic motor and intermeshing sprocket wheel, chain, described hydraulic motor is connected on described girder, described sprocket wheel is fixed on the output shaft of described hydraulic motor, and described chain is fixed on the inner surface of described H shaped steel bottom flange.
4. bow member pipe canopy rig according to claim 1, it is characterized in that, described side supporting wheel systems comprises hydraulic cylinder, side connecting rod, sidewinders driving wheel, the middle part that one end of described hydraulic cylinder is articulated on described front lift arm or rear lift arm, the other end is articulated in described side connecting rod, described side connecting rod one end is articulated on described girder, other end installation side roller.
5. bow member pipe canopy rig according to claim 1, it is characterized in that, described drilling machine operating mechanism comprises nose girder, unit head, drilling rod and drilling tool, described nose girder is provided with drill pipe clamp, the front end of described nose girder is provided with centre head, the bottom of described nose girder by adpting flange be connected hinged seat and described front lift arm be connected lift arm and be connected, be provided with vertical fine setting hydraulic cylinder between one of them adpting flange and described nose girder, described unit head is connected on nose girder by hydraulic cylinder-chain-sprocket transmission device.
6. bow member pipe canopy rig according to claim 1, is characterized in that, described front lift arm and rear lift arm comprise lead, and described lead comprises inner prop and column jacket, and the inside of described inner prop is provided with lifting hydraulic cylinder.
7. bow member pipe canopy rig according to claim 1, is characterized in that, described rig walking mechanism comprises road wheel, walking wheel carrier, walking rotating mechanism, bearing pin and motor transmission system.Described road wheel is the two-wheel edge wheel, and walking is supported at the rail of bottom; The walking wheel carrier connects road wheel and rotating mechanism, and the support motor transmission system; The road wheel rotating mechanism can realize road wheel in length and breadth to rotation, thereby pipe canopy drill carriage is moved along the work plane vertical and horizontal.Bearing pin is used for fixing relatively rotating of walking wheel carrier and road wheel rotating mechanism; Motor transmission system provides power for walking mechanism.
8. the described bow member pipe of according to claim 1 to 7 any one canopy rig, it is characterized in that, also comprise control system and hydraulic power unit, described control system and hydraulic power unit are positioned on the connecting cross beam of bottom of described bow member, and described control system comprises electrical control system and hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310065423.7A CN103114808B (en) | 2013-03-01 | 2013-03-01 | Arch centering pipe shed drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310065423.7A CN103114808B (en) | 2013-03-01 | 2013-03-01 | Arch centering pipe shed drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103114808A true CN103114808A (en) | 2013-05-22 |
| CN103114808B CN103114808B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310065423.7A Active CN103114808B (en) | 2013-03-01 | 2013-03-01 | Arch centering pipe shed drilling machine |
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| CN (1) | CN103114808B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194023A (en) * | 2017-12-22 | 2018-06-22 | 中地装重庆探矿机械有限公司 | A kind of all-hydraulic drill |
| CN108678666A (en) * | 2018-07-28 | 2018-10-19 | 徐工集团工程机械有限公司 | A kind of multifunctional drill and pipe canopy mounting device |
| CN111173445A (en) * | 2020-01-07 | 2020-05-19 | 中铁十八局集团有限公司 | Drilling is with moving platform truck based on construction of TBM method tunnel |
| CN111335901A (en) * | 2020-04-09 | 2020-06-26 | 中铁十八局集团有限公司 | Construction method for auxiliary small-diameter open TBM tunneling of pipe shed at unfavorable geological tunnel section |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1247526A1 (en) * | 1985-01-10 | 1986-07-30 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Feed device for drilling machine |
| CN102251747A (en) * | 2011-06-20 | 2011-11-23 | 北京首尔工程技术有限公司 | Arc-shaped drill rack |
| CN102536128A (en) * | 2010-12-09 | 2012-07-04 | 无锡市安迈工程机械有限公司 | Pipe-roof drilling rig with synchronous-traversing rotary table |
| CN203213955U (en) * | 2013-03-01 | 2013-09-25 | 中铁第五勘察设计院集团有限公司 | Arch center pipe shed drilling rig |
-
2013
- 2013-03-01 CN CN201310065423.7A patent/CN103114808B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1247526A1 (en) * | 1985-01-10 | 1986-07-30 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Feed device for drilling machine |
| CN102536128A (en) * | 2010-12-09 | 2012-07-04 | 无锡市安迈工程机械有限公司 | Pipe-roof drilling rig with synchronous-traversing rotary table |
| CN102251747A (en) * | 2011-06-20 | 2011-11-23 | 北京首尔工程技术有限公司 | Arc-shaped drill rack |
| CN203213955U (en) * | 2013-03-01 | 2013-09-25 | 中铁第五勘察设计院集团有限公司 | Arch center pipe shed drilling rig |
Non-Patent Citations (1)
| Title |
|---|
| 邓年生: "管棚支护台车钻机动力头及其液压驱动***动力学研究", 《中国优秀硕士论文全文库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194023A (en) * | 2017-12-22 | 2018-06-22 | 中地装重庆探矿机械有限公司 | A kind of all-hydraulic drill |
| CN108678666A (en) * | 2018-07-28 | 2018-10-19 | 徐工集团工程机械有限公司 | A kind of multifunctional drill and pipe canopy mounting device |
| CN108678666B (en) * | 2018-07-28 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Multifunctional drilling machine and pipe shed mounting device |
| CN111173445A (en) * | 2020-01-07 | 2020-05-19 | 中铁十八局集团有限公司 | Drilling is with moving platform truck based on construction of TBM method tunnel |
| CN111173445B (en) * | 2020-01-07 | 2021-10-08 | 中铁十八局集团有限公司 | Drilling is with moving platform truck based on construction of TBM method tunnel |
| CN111335901A (en) * | 2020-04-09 | 2020-06-26 | 中铁十八局集团有限公司 | Construction method for auxiliary small-diameter open TBM tunneling of pipe shed at unfavorable geological tunnel section |
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| Publication number | Publication date |
|---|---|
| CN103114808B (en) | 2015-03-18 |
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