CN113530442A - Single track release rig structure - Google Patents
Single track release rig structure Download PDFInfo
- Publication number
- CN113530442A CN113530442A CN202110871774.1A CN202110871774A CN113530442A CN 113530442 A CN113530442 A CN 113530442A CN 202110871774 A CN202110871774 A CN 202110871774A CN 113530442 A CN113530442 A CN 113530442A
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- Prior art keywords
- pressure relief
- assembly
- cylinder
- drilling machine
- oil cylinder
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- 238000005553 drilling Methods 0.000 claims abstract description 94
- 230000001105 regulatory effect Effects 0.000 claims 3
- 238000001514 detection method Methods 0.000 abstract description 17
- 230000005641 tunneling Effects 0.000 abstract description 13
- 238000011068 loading method Methods 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
- E21B15/045—Hydraulic, pneumatic or electric circuits for their positioning
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a monorail pressure relief drilling machine structure, which relates to the technical field of coal mine roadway tunneling equipment and comprises a telescopic supporting leg assembly, an adjusting arm assembly and a pressure relief drilling machine assembly, wherein the first end of the telescopic supporting leg assembly is rotatably arranged on a hinged seat, and the hinged seat is rotatably arranged on a host; the second end of the adjusting arm assembly is rotatably mounted at the second end of the telescopic leg assembly, and the pressure relief drilling machine assembly is connected with the first end of the adjusting arm assembly through a swing support; still be connected with the gyration hydro-cylinder on the articulated seat, the first end of gyration hydro-cylinder rotate install in on the host computer, the second end of gyration hydro-cylinder with articulated seat rotates and is connected. The invention adopts a modular design, can be used on equipment with a rock drilling and drilling function, such as a rock drilling trolley, a drilling and loading integrated machine, a drilling, loading and anchoring integrated machine and the like, so as to meet the drilling and detection requirements in the tunneling process, and can also be used for reconstructing the existing equipment.
Description
Technical Field
The invention relates to the technical field of coal mine roadway tunneling equipment, in particular to a monorail pressure relief drilling machine structure.
Background
At present, in the tunneling construction of tunnels of coal mines, non-coal mines and the like, the safety requirement of' tunneling must be strictly executed, so that the early-stage safety detection and inspection work of water detection, gas detection and the like must be carried out before tunneling, most of the currently adopted detection equipment is a crawler-type tunnel drilling machine or an advanced detection drilling machine and the like, the equipment is specially used for detecting gas, water and the like near the tunnels, the detection distance is limited, and once the detection is finished, the equipment immediately exits from the working surface so that the tunneling equipment such as a rock drilling trolley or a drilling and loading integrated machine and the like can conveniently enter the working surface for operation; after the tunnel is tunneled, the tunnel drilling machine or the advanced drilling machine enters the working face again to detect the next tunneling distance, and the process is repeated in such a way, so that the phenomenon that multiple pieces of tunnel tunneling equipment with different functions need to make a vehicle wrong in a narrow tunnel exists, and potential safety hazards exist.
In practice, when drilling and hole measuring are carried out on a mine, in order to reduce the frequency of entering and exiting the working face of equipment, a detection hole is drilled to the depth as far as possible during operation, so that the phenomena of drilling failure or drill clamping due to too deep drilling easily occur, and in severe cases, a drill rod or a drill bit cannot retreat to cause waste. The detection drilling machine has large volume, occupies the space size of the roadway, is inconvenient to enter and exit from the working face, and influences the tunneling efficiency of the roadway; in addition, the equipment has single function, low utilization rate, long idle time and easy corrosion and damage.
Therefore, how to realize the integration of the detection drilling machine and the drill jumbo or the drilling and loading integrated machine becomes a problem to be solved urgently in coal mine roadway tunneling equipment.
Disclosure of Invention
The invention aims to provide a monorail pressure relief drilling machine structure, which solves the problems in the prior art, adopts a modular design, can be used on equipment with a rock drilling and drilling function, such as a rock drilling trolley, a drilling and loading integrated machine, a drilling and loading and anchoring integrated machine and the like, so as to meet the drilling and detection requirements in roadway excavation and also can be used for reconstructing the existing equipment.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a monorail pressure relief drilling machine structure which comprises a telescopic supporting leg assembly, an adjusting arm assembly and a pressure relief drilling machine assembly, wherein the first end of the telescopic supporting leg assembly is rotatably installed on a hinge seat, and the hinge seat is rotatably installed on a host; the second end of the adjusting arm assembly is rotatably mounted at the second end of the telescopic leg assembly, and the pressure relief drilling machine assembly is connected with the first end of the adjusting arm assembly through a swing support; still be connected with the gyration hydro-cylinder on the articulated seat, the first end of gyration hydro-cylinder rotate install in on the host computer, the second end of gyration hydro-cylinder with articulated seat rotates and is connected.
Preferably, the host is a monorail roof bolter, the hinge base is mounted on a portal frame of the monorail roof bolter through a pressure relief drilling machine mounting base, and the hinge base is rotatably connected with the pressure relief drilling machine mounting base; the rotary oil cylinder can drive the hinge base to swing left and right in the pressure relief drilling machine mounting base.
Preferably, a rotary oil cylinder seat is further installed on a portal frame of the monorail anchor rod machine, a shaft sleeve is installed on the rotary oil cylinder seat, and a first end of the rotary oil cylinder is rotatably connected with the shaft sleeve through a pin shaft.
Preferably, the left side and the right side of the rotary oil cylinder seat are respectively provided with a pressure relief drilling machine mounting seat plate, and the pressure relief drilling machine mounting seat plate can be fixedly provided with the pressure relief drilling machine mounting seat; and the left end and the right end of the rotary oil cylinder seat are respectively provided with a shaft sleeve.
Preferably, still be connected with landing leg upset hydro-cylinder on the articulated seat, the first end of landing leg upset hydro-cylinder with articulated seat rotates to be connected, the second end of landing leg upset hydro-cylinder with flexible landing leg subassembly rotates to be connected.
Preferably, the telescopic supporting leg assembly comprises a telescopic supporting leg main body, the telescopic supporting leg main body comprises a supporting leg outer sleeve, a supporting leg inner sleeve and a supporting oil cylinder, the supporting leg inner sleeve is coaxially arranged in the supporting leg outer sleeve, and the supporting oil cylinder is arranged in the supporting leg inner sleeve.
Preferably, the telescopic leg assembly is further connected with an adjusting arm extending oil cylinder, one end of the adjusting arm extending oil cylinder is rotatably connected with the adjusting arm assembly, and the other end of the adjusting arm extending oil cylinder is rotatably connected with the telescopic leg assembly.
Preferably, the adjusting arm assembly comprises an adjusting arm body, the second end of the adjusting arm body is rotatably connected with the second end of the telescopic supporting leg assembly, the first end of the adjusting arm body is connected with a swing oil cylinder, the swing oil cylinder is connected with a mounting seat, the mounting seat is connected with a rotary drive, and the pressure relief drilling machine assembly is connected with the rotary drive through a swing support.
Compared with the prior art, the invention has the following technical effects:
1. the pressure relief drilling machine is of a modular structure, and the conventional equipment is conveniently transformed;
the pressure relief drilling machine is designed into a modular structure, and is installed through a mounting seat of the pressure relief drilling machine and a portal frame on a host machine, so that the structure is simple, the assembly and disassembly are convenient, and the existing equipment is favorably improved. The device can be installed left and right according to the working condition requirement.
2. The drilling is combined, and the operation efficiency is high;
the anchor rod anchor cable hole drilling function and the drilling hole measuring function are integrated into a whole, mutual interference is avoided during working, organic combination of the anchor rod drilling device and the detecting device is achieved, a novel drilling arm frame structure is formed, water and gas detection special equipment such as a tunnel drilling machine or an advanced detection drilling machine is not needed in tunnel tunneling equipment, equipment types and operating personnel are reduced, equipment management is simplified, the equipment utilization rate is improved, and the tunnel tunneling efficiency is higher.
3. The operation is convenient, and the digging and probing are carried out simultaneously;
in the process of drilling and boring, water drilling and air hole probing operation can be carried out at any time, so that 'drilling and probing along with excavation' is realized, and the original tunnel drilling machine or advanced detection drilling machine can drill deep holes at one time and is divided into multiple drilling and hole probing, so that the problems that the tunnel drilling machine or the advanced detection drilling machine clamps and drills due to deep hole drilling, or the drill cannot advance or retreat due to hard rock drilling and the like are solved. Function switching is convenient, operation is convenient, and the safety of tunnel construction is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a monorail pressure relief drilling rig structure of the present invention;
FIG. 2 is a top view of the monorail pressure relief drill structure of the present invention;
FIG. 3 is a schematic view of the single-rail pressure relief drilling rig structure for drilling holes on left and right lateral walls in a roadway;
FIG. 4 is a schematic view of the monorail pressure relief drilling rig structure of the invention for drilling holes in the tunnel face;
FIG. 5 is a schematic structural view of the telescoping leg assembly of the present invention;
FIG. 6 is a top view of the telescoping leg assembly of the present invention;
FIG. 7 is a side view of the telescoping leg assembly of the present invention;
FIG. 8 is a schematic structural view of an adjustment arm assembly of the present invention;
FIG. 9 is a top view of the adjustment arm assembly of the present invention;
FIG. 10 is a side view of an adjustment arm assembly of the present invention;
FIG. 11 is a schematic illustration of the construction of the pressure relief drill assembly of the present invention;
FIG. 12 is a top view of the pressure relief drill assembly of the present invention;
FIG. 13 is a side view of the pressure relief drill assembly of the present invention;
wherein: 1-hinged base, 2-leg overturning oil cylinder, 3-telescopic leg component, 301-leg outer sleeve, 302-leg inner sleeve, 303-supporting oil cylinder, 4-adjusting arm component, 401-adjusting arm body, 5-adjusting arm extending oil cylinder, 6-portal frame, 7-rotating oil cylinder, 8-rotating oil cylinder base, 9-pressure relief drill mounting base plate, 10-pressure relief drill mounting base, 11-pressure relief drill component, 1101-sliding block, 1102-sliding rail, 1103-supporting rod component, 1104-pushing chain component, 1105-pushing oil cylinder, 1106-swinging bracket, 1107-pushing assembly, 1108-compensating oil cylinder, 12-pin shaft, 13-positioning sleeve, 14-shaft sleeve, 15-swinging oil cylinder and 16-mounting base, 17-slewing drive.
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 of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a monorail pressure relief drilling machine structure, which solves the problems in the prior art, adopts a modular design, can be used on equipment with a rock drilling and drilling function, such as a rock drilling trolley, a drilling and loading integrated machine, a drilling and loading and anchoring integrated machine and the like, so as to meet the drilling and detection requirements in roadway excavation and also can be used for reconstructing the existing equipment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-13: the embodiment provides a monorail pressure relief drilling machine structure which mainly comprises a telescopic leg assembly 3, an adjusting arm assembly 4 and a pressure relief drilling machine assembly 11, wherein a first end of the telescopic leg assembly 3 is rotatably installed on a hinge base 1, and the hinge base 1 is rotatably installed on a host; the second end of the adjusting arm assembly 4 is rotatably mounted to the second end of the telescoping leg assembly 3, and the pressure relief drill assembly 11 is connected to the first end of the adjusting arm assembly 4 by a swing bracket 1106; still be connected with rotary cylinder 7 on articulated seat 1, rotary cylinder 7's first end is rotated and is installed on the host computer, and rotary cylinder 7's second end is rotated with articulated seat 1 and is connected, and is flexible through control rotary cylinder 7, can drive articulated seat 1 horizontal hunting.
In the embodiment, the main machine is a monorail roof bolter or other equipment is selected according to needs, the hinge base 1 is installed on a portal frame 6 of the monorail roof bolter through the pressure relief drilling machine installation base 10, the monorail pressure relief drilling machine is of a modular structure, and the monorail pressure relief drilling machine installation base 10 is installed on the equipment, so that the existing equipment is conveniently modified; the hinged base 1 is rotatably connected with the pressure relief drilling machine mounting base 10, and the hinged base 1 can be driven to swing left and right in the pressure relief drilling machine mounting base 10 by controlling the telescopic action of the rotary oil cylinder 7.
In this embodiment, a gantry 6 of the monorail roof bolter is further provided with a rotary cylinder base 8, the rotary cylinder base 8 is provided with a shaft sleeve 14, and a first end of the rotary cylinder 7 is rotatably connected with the shaft sleeve 14 through a pin shaft 12.
In the embodiment, the left side and the right side of the rotary oil cylinder seat 8 are respectively provided with a pressure relief drill mounting seat plate 9, each pressure relief drill mounting seat plate 9 can be fixedly provided with a pressure relief drill mounting seat 10, the two pressure relief drill mounting seat plates 9 are designed in a bilateral symmetry manner, and a single-rail pressure relief drill structure can be selectively installed in a bilateral symmetry manner according to the working condition requirement; furthermore, the left end and the right end of the rotary oil cylinder base 8 are respectively provided with a shaft sleeve 14, the two shaft sleeves 14 are designed in a bilateral symmetry mode, and the rotary oil cylinder 7 can be conveniently and bilaterally symmetrically selected and installed according to the requirements of working conditions.
In this embodiment, still be connected with landing leg upset hydro-cylinder 2 on articulated seat 1, landing leg upset hydro-cylinder 2's first end rotates with articulated seat 1 to be connected, and landing leg upset hydro-cylinder 2's second end rotates with flexible landing leg subassembly 3 to be connected, can drive flexible landing leg subassembly 3 through landing leg upset hydro-cylinder 2 and rotate along articulated seat 1.
In the present embodiment, the telescopic leg assembly 3 includes a telescopic leg main body, the telescopic leg main body includes a leg outer sleeve 301, a leg inner sleeve 302 and a support cylinder 303, the leg inner sleeve 302 is coaxially disposed in the leg outer sleeve 301, and the support cylinder 303 is disposed in the leg inner sleeve 302. The telescopic leg assembly 3 may also be selected from other telescopic leg structures in the prior art according to the work requirement.
In this embodiment, the telescopic leg assembly 3 is further connected with an adjusting arm extending oil cylinder 5, one end of the adjusting arm extending oil cylinder 5 is rotatably connected with the adjusting arm assembly 4, and the other end is rotatably connected with the telescopic leg assembly 3; the adjusting arm component 4 can be driven to contract and extend by controlling the adjusting arm extending oil cylinder 5 to stretch and retract.
In the present embodiment, the adjusting arm assembly 4 includes an adjusting arm body 401, the second end of the adjusting arm body 401 is rotatably connected to the second end of the telescopic leg assembly 3, the first end of the adjusting arm body 401 is connected to a swing cylinder 15, the swing cylinder 15 is connected to a mounting base 16, the mounting base 16 is connected to a swing drive 17, and the pressure relief drill assembly 11 is connected to the swing drive 17 through a swing bracket 1106. In the embodiment, the pressure relief drilling machine assembly 11 can rotate axially by rotating a rotation driving 17 assembly (also called a rotation speed reducer, which is composed of a hydraulic motor, a speed reducer and the like) of the adjusting arm assembly 4, so that the pressure relief drilling machine assembly 11 can rotate 360 degrees and drill holes with no dead angle on the full section by rotating the rotation driving 17 assembly of the adjusting arm assembly 4; in this embodiment, the swing drive 17 assembly may be replaced with a spiral swing cylinder 15 or the like according to the operation requirement, so as to achieve a similar function.
In the present embodiment, the pressure relief drill assembly 11 is a pressure relief (water, gas) drill assembly, which may be selected from the prior art according to the work requirement, for example, the pressure relief drill assembly 11 may include a slide 1101, a slide 1102, a drill assembly 1103, a propulsion chain assembly 1104, a propulsion cylinder 1105, a swing bracket 1106, a propulsion assembly 1107, a compensation cylinder 1108, and the like.
As shown in fig. 3, in this embodiment, when the single-rail pressure relief drilling rig structure drills holes on left and right sides in a roadway, the rotary oil cylinder 7 extends and retracts, and the single-rail pressure relief drilling rig structure can be controlled to swing left and right by pushing the hinge base 1.
As shown in fig. 4, in the single-rail pressure relief drilling rig structure in the embodiment, when a hole is drilled on the tunnel face in a roadway, the support leg overturning oil cylinder 2 is contracted to a position, the telescopic support leg assembly 3 is pushed to a state perpendicular to the ground, and the support oil cylinder 303 extends out to prop up the ground; the adjusting arm stretching oil cylinder 5 extends out to stretch the adjusting arm assembly 4 to a proper position; the swing drive 17 rotates the pressure relief drill assembly 11, adjusting the pressure relief drill assembly 11 to the proper position for drilling.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A single track release rig structure which characterized in that: the pressure relief drilling machine comprises a telescopic leg assembly, an adjusting arm assembly and a pressure relief drilling machine assembly, wherein a first end of the telescopic leg assembly is rotatably installed on a hinge seat, and the hinge seat is rotatably installed on a host; the second end of the adjusting arm assembly is rotatably mounted at the second end of the telescopic leg assembly, and the pressure relief drilling machine assembly is connected with the first end of the adjusting arm assembly through a swing support; still be connected with the gyration hydro-cylinder on the articulated seat, the first end of gyration hydro-cylinder rotate install in on the host computer, the second end of gyration hydro-cylinder with articulated seat rotates and is connected.
2. The monorail pressure relief drill structure of claim 1, wherein: the main machine is a monorail roof bolter, the hinge seat is mounted on a portal frame of the monorail roof bolter through a pressure relief drilling machine mounting seat, and the hinge seat is rotationally connected with the pressure relief drilling machine mounting seat; the rotary oil cylinder can drive the hinge base to swing left and right in the pressure relief drilling machine mounting base.
3. The monorail pressure relief drill structure of claim 2, wherein: the gantry of the monorail anchor rod machine is further provided with a rotary oil cylinder base, the rotary oil cylinder base is provided with a shaft sleeve, and the first end of the rotary oil cylinder is rotatably connected with the shaft sleeve through a pin shaft.
4. The monorail pressure relief drill structure of claim 3, wherein: the left side and the right side of the rotary oil cylinder seat are respectively provided with a pressure relief drilling machine mounting seat plate, and the pressure relief drilling machine mounting seat plate can be fixedly provided with the pressure relief drilling machine mounting seat; and the left end and the right end of the rotary oil cylinder seat are respectively provided with a shaft sleeve.
5. The monorail pressure relief drill structure of claim 1, wherein: still be connected with landing leg upset hydro-cylinder on the articulated seat, the first end of landing leg upset hydro-cylinder with articulated seat rotates to be connected, the second end of landing leg upset hydro-cylinder with flexible landing leg subassembly rotates to be connected.
6. The monorail pressure relief drill structure of claim 1, wherein: the telescopic supporting leg assembly comprises a telescopic supporting leg main body, the telescopic supporting leg main body comprises a supporting leg outer sleeve, a supporting leg inner sleeve and a supporting oil cylinder, the supporting leg inner sleeve is coaxially arranged in the supporting leg outer sleeve, and the supporting oil cylinder is arranged in the supporting leg inner sleeve.
7. The monorail pressure relief drill structure of claim 1, wherein: still be connected with the regulating arm on the flexible landing leg subassembly and extend the hydro-cylinder, the regulating arm extend the one end of hydro-cylinder with the regulating arm subassembly rotates to be connected, the other end with flexible landing leg subassembly rotates to be connected.
8. The monorail pressure relief drill structure of claim 1, wherein: the adjusting arm assembly comprises an adjusting arm body, the second end of the adjusting arm body is rotatably connected with the second end of the telescopic supporting leg assembly, the first end of the adjusting arm body is connected with a swing oil cylinder, the swing oil cylinder is connected with a mounting seat, the mounting seat is connected with a rotary drive, and the pressure relief drilling machine assembly is connected with the rotary drive through a swing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871774.1A CN113530442A (en) | 2021-07-30 | 2021-07-30 | Single track release rig structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871774.1A CN113530442A (en) | 2021-07-30 | 2021-07-30 | Single track release rig structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113530442A true CN113530442A (en) | 2021-10-22 |
Family
ID=78121562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110871774.1A Pending CN113530442A (en) | 2021-07-30 | 2021-07-30 | Single track release rig structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113530442A (en) |
-
2021
- 2021-07-30 CN CN202110871774.1A patent/CN113530442A/en active Pending
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