CN113482126A - Underground pipeline laying device for municipal drainage construction and use method thereof - Google Patents
Underground pipeline laying device for municipal drainage construction and use method thereof Download PDFInfo
- Publication number
- CN113482126A CN113482126A CN202110684644.7A CN202110684644A CN113482126A CN 113482126 A CN113482126 A CN 113482126A CN 202110684644 A CN202110684644 A CN 202110684644A CN 113482126 A CN113482126 A CN 113482126A
- Authority
- CN
- China
- Prior art keywords
- drainage pipeline
- drainage
- main frame
- laying device
- propulsion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention discloses an underground pipeline laying device for municipal drainage construction, which is used for assisting in butt joint of large and heavy drainage pipelines and comprises a main frame, a propelling component and a bottom adjusting component, wherein the propelling component is arranged on the main frame and used for bearing the drainage pipelines and pushing the drainage pipelines to move axially for adjustment, and the bottom adjusting component is arranged below the main frame and used for fixing the main frame and adjusting the working height of the main frame. The invention can bear the large pipeline hoisted in place, reduces the use frequency of hoisting equipment in the laying process, and can simultaneously push the drainage pipeline to move axially through the propelling component and utilize the bottom adjusting component to fix and adjust the height of the mounting station so as to achieve the aim of utilizing the propelling component and the bottom adjusting component to replace manpower to carry out accurate butt joint.
Description
Technical Field
The invention is applied to the field of drainage pipeline laying, and particularly relates to an underground pipeline laying device for municipal drainage construction and a using method thereof.
Background
Municipal drainage pipe mostly adopts the large-scale drainage pipe of bulky, the metal of heavy weight or the cement system, and it lays the connection process and often adopts the crane hoist and mount to the installation station, and the reuse manpower carries out accurate butt joint, and the process is comparatively loaded down with trivial details wastes time and energy, and needs a large amount of manpowers to lead to the higher potential safety hazard and the accident of appearing of installation process risk easily.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an underground pipeline laying device for municipal drainage construction and a using method thereof.
In order to solve the technical problem, the underground pipeline laying device for municipal drainage construction is used for assisting in butt joint of large and heavy drainage pipelines and comprises a main frame, a propelling assembly and a bottom adjusting assembly, wherein the propelling assembly is arranged on the main frame and used for bearing the drainage pipelines and pushing the drainage pipelines to move axially for adjustment, and the bottom adjusting assembly is arranged below the main frame and used for fixing the main frame and adjusting the working height of the main frame.
As a possible implementation manner, further, the propelling assembly comprises a plurality of groups of propelling wheels symmetrically arranged on two sides of the main frame and a driving motor arranged corresponding to the propelling wheels and used for driving the propelling wheels to move, parallel lines of axes of the propelling wheels are tangent to the tangent plane circumference of the drainage pipeline, the drainage pipeline is pressed on the surface of the propelling wheels, and the driving motor drives the propelling wheels to rotate to push the drainage pipeline on the propelling wheels to move axially on the propelling assembly.
As a possible implementation manner, further, U-shaped mounting lugs are arranged on two sides of the main frame corresponding to the propulsion wheels, the propulsion wheels are rotatably connected to the U-shaped mounting lugs and can rotate relative to the main frame, the driving motor is fixedly mounted on one side of the U-shaped mounting lugs, and an output shaft of the driving motor is fixedly connected with the propulsion wheels in a transmission manner to drive the propulsion wheels to rotate.
As a possible implementation manner, further, the bottom adjusting assembly comprises a bottom plate, moving members and supporting members, the bottom plate is fixedly installed below the main frame, the moving members are arranged below the bottom plate and used for being matched with the main frame to move, and the supporting members are symmetrically arranged on two sides of the bottom plate corresponding to the number of the propelling wheels and used for jacking and fixing the device.
As a possible implementation manner, further, the moving parts are follow-up universal wheels, and the number and the installation positions of the moving parts correspond to those of the supporting parts.
As a possible implementation manner, further, the support member includes a mounting wing plate and an air cylinder, the air cylinder is fixedly mounted on the mounting wing plate through bolts and clips, the mounting wing plate is fixed on two sides of the bottom plate, and the movable end face of the air cylinder is uniformly provided with a pricking nail.
As a possible implementation manner, further, an installation bearing cavity is formed in the center of the upper surface of the main frame, two groups of bearing rollers are symmetrically arranged in the installation bearing cavity, two ends of each bearing roller are rotatably connected with two end walls of the installation bearing cavity, the bearing rollers can rotate relative to the main frame, and when the main frame bears the drainage pipeline, the lower end of the drainage pipeline is arranged between the two groups of bearing rollers.
As a possible implementation mode, further, the surface of the receiving roller is uniformly provided with a ball mounting seat, an auxiliary ball capable of rotating relative to the ball mounting seat is arranged in the ball mounting seat, and the auxiliary ball in the ball mounting seat is matched to rotate when the drainage pipeline moves axially.
A use method of an underground pipeline laying device for municipal drainage construction comprises the following steps:
placing the laying device at a position to be installed, so that the closest distance between the laying device and the last section of drainage pipeline is less than half of the length of the drainage pipeline;
hoisting the drainage pipeline to be connected by using hoisting equipment, placing the drainage pipeline on a laying device, and placing the laying device between two groups of receiving rollers, wherein the laying device bears the middle section of the drainage pipeline to be connected and the lowest end of the drainage pipeline in a flat state is placed between the two groups of receiving rollers;
controlling the cylinder of the support piece to be electrified and extended to enable the prick nail to penetrate into the landmark soil for fixation;
the driving motor is controlled to work to drive the two groups of propelling wheels to rotate to propel the drainage pipeline to move axially to be close to the upper drainage pipeline and to be pushed into the upper drainage pipeline for connection, the purpose of adjusting the installation height of the drainage pipeline can be achieved by adjusting the telescopic amount of the cylinder of the supporting piece in the process, and pipeline laying connection is completed;
controlling the cylinder of the support piece to be electrified and contracted, and pulling out the prick nail to enable the moving piece to be in contact with the ground surface;
the driving motor is controlled to rotate reversely, the supporting piece is not fixed, the drainage pipelines to be connected are connected and fixed, the propelling wheel rotates on the surface of the fixed drainage pipeline to push the whole laying device to move outwards along the drainage pipeline, and the propelling wheel rotates in a matched mode in the process to enable the laying device to move to the tail end of the drainage pipeline to be taken out conveniently.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention can bear the large pipeline hoisted in place, reduces the use frequency of hoisting equipment in the laying process, and can simultaneously push the drainage pipeline to move axially through the propelling component and utilize the bottom adjusting component to fix and adjust the height of the mounting station so as to achieve the aim of utilizing the propelling component and the bottom adjusting component to replace manpower to carry out accurate butt joint.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic view of the butt joint state of the pipes according to the present invention;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a schematic view of a receiving roll according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present invention provides an underground pipe laying device for municipal drainage construction, which is used for assisting in butt joint of large and heavy drainage pipes 100, and comprises a main frame 1, a propulsion assembly 2 and a bottom adjustment assembly 3, wherein the propulsion assembly 2 is arranged on the main frame 1 and is used for carrying the drainage pipes 100 and pushing the drainage pipes to move axially for adjustment, and the bottom adjustment assembly 3 is arranged below the main frame 1 and is used for fixing the main frame 1 and adjusting the working height of the main frame 1. The propulsion assembly 2 comprises a plurality of groups of propulsion wheels 21 symmetrically arranged on two sides of the main frame 1 and a driving motor 22 arranged corresponding to the propulsion wheels 21 and used for driving the propulsion wheels 21 to move, parallel lines of the axes of the propulsion wheels 21 are tangent to the circumference of the tangent plane of the drainage pipeline 100, the drainage pipeline 100 is pressed on the surface of the propulsion wheels 21, and the driving motor 22 drives the propulsion wheels 21 to rotate to push the drainage pipeline 100 on the propulsion wheels to move axially on the propulsion assembly 2. The main frame 1 both sides correspond propulsion wheel 21 and are equipped with U type installation ear 11, propulsion wheel 21 rotates to be connected and can rotate relative main frame 1 on U type installation ear 11, driving motor 22 fixed mounting is in U type installation ear 11 one side, and its output shaft and propulsion wheel 21 fixed transmission are connected and are driven its rotation. Bottom adjusting part 3 includes bottom plate 31, moving member 32 and support piece 33, bottom plate 31 fixed mounting is in body frame 1 below, moving member 32 sets up and is used for cooperating body frame 1 to remove in bottom plate 31 below, the quantity symmetry that support piece 33 corresponds propulsion wheel 21 sets up in bottom plate 31 both sides, and it is used for fixing the device jack-up. The moving members 32 are follower universal wheels, and the number and the installation positions of the moving members 32 correspond to those of the supporting members 33. The support piece 33 comprises an installation wing plate 331 and a cylinder 332, the cylinder 332 is fixedly installed on the installation wing plate 331 through bolts and hoops, the installation wing plate 331 is fixed on two sides of the bottom plate 31, the movable end face of the cylinder 332 is uniformly provided with pricking nails 333, the pricking nails 333 are distributed in a mode that a group of main pricking nails are arranged on the movable end face, the rest auxiliary pricking nails are uniformly arranged around the main pricking nails, the length of the main pricking nails is three times of that of the auxiliary pricking nails, the tail end of the main pricking nail is directly and fixedly connected with the movable end face, the movable end of the cylinder is provided with a abdicating groove corresponding to the auxiliary pricking nails, each abdicating groove is internally provided with an elastic piece with a larger elastic coefficient, two ends of the elastic piece are respectively and fixedly connected with the movable end and the auxiliary pricking nails, the main pricking nail is directly fixed in soil when the cylinder extends, the rest pricking nails are additionally fixed in loose soil, if a harder stone exists on the earth surface, the elastic piece compression of corresponding position provides the space of stepping down and makes other nail of stabbing can normally work, can not influence whole fixed effect because of the hardness in single position. The installation and bearing cavity 12 is formed in the center of the upper surface of the main frame 1, two sets of bearing rollers 13 are symmetrically arranged in the installation and bearing cavity 12, two ends of each bearing roller 13 are rotatably connected with two end walls of the installation and bearing cavity 12, each bearing roller 13 can rotate relative to the main frame 1, and when the main frame 1 bears the drainage pipeline 100, the lower end of the drainage pipeline 100 is arranged between the two sets of bearing rollers 13. The surface of the receiving roller 13 is uniformly provided with a ball mounting seat, an auxiliary ball capable of rotating relative to the ball mounting seat is arranged in the ball mounting seat, and the auxiliary ball in the ball mounting seat rotates in a matched manner when the drainage pipeline 100 moves axially. In the actual operation process, the receiving rollers 13 are driven by electric motors and can rotate relative to the device, when the rotating directions of the two groups of receiving rollers 13 are the same, the installation angle of the drainage pipeline 100 can be adjusted to enable the drainage pipeline 100 to rotate, and when the rotating directions of the two groups of receiving rollers 13 are opposite, the drainage pipeline 100 can be limited to prevent the drainage pipeline 100 from sliding and separating in the laying process.
A use method of an underground pipeline laying device for municipal drainage construction comprises the following steps:
placing the laying device at a position to be installed, so that the closest distance between the laying device and the last section of drainage pipeline 100 is less than half of the length of the drainage pipeline 100;
hoisting the drainage pipeline 100 to be connected by using hoisting equipment, placing the hoisting equipment on a laying device, and enabling the laying device to bear the middle section of the drainage pipeline 100 to be connected and the lowest end of the drainage pipeline 100 in a flat state to be placed between two groups of receiving rollers 13;
the cylinder 332 of the support member 33 is controlled to be electrified and extended, so that the pricking pin 333 is deeply inserted into the landmark soil for fixation;
controlling the driving motor 22 to work to drive the two groups of propelling wheels 21 to rotate to propel the drainage pipeline 100 to axially move to be close to the upper drainage pipeline 100 and to be pushed into the upper drainage pipeline 100 for connection, and achieving the purpose of adjusting the installation height of the drainage pipeline 100 by adjusting the telescopic amount of the cylinder 332 of the supporting piece 33 in the process to complete pipeline laying connection;
the cylinder 332 of the support member 33 is controlled to be electrified and contracted, and the pricking nail 333 is pulled out to enable the moving member 32 to be in contact with the ground surface;
when the driving motor 22 is controlled to rotate reversely, the supporting member 33 is not fixed and the drainage pipeline 100 to be connected is connected and fixed, the propelling wheel 21 rotates on the surface of the fixed drainage pipeline 100 to push the whole laying device to move outwards along the drainage pipeline 100, and in the process, the propelling wheel 21 rotates in coordination to move the laying device to the tail end of the drainage pipeline 100 to be taken out conveniently.
The foregoing is directed to embodiments of the present invention, and equivalents, modifications, substitutions and variations such as will occur to those skilled in the art, which fall within the scope and spirit of the appended claims.
Claims (9)
1. The utility model provides an underground piping laying device for municipal drainage construction for supplementary big heavy drainage pipe of butt joint, its characterized in that: the device comprises a main frame, a propelling component and a bottom adjusting component, wherein the propelling component is arranged on the main frame and used for bearing a drainage pipeline and pushing the drainage pipeline to move axially for adjustment, and the bottom adjusting component is arranged below the main frame and used for fixing the main frame and adjusting the working height of the main frame.
2. The underground pipe laying device for municipal drainage construction according to claim 1, wherein: the propulsion assembly comprises a plurality of groups of propulsion wheels which are symmetrically arranged on two sides of the main frame and a driving motor which is arranged corresponding to the propulsion wheels and used for driving the propulsion wheels to move, parallel lines of the axes of the propulsion wheels are tangent to the circumference of the section of the drainage pipeline, the drainage pipeline is pressed on the surface of the propulsion wheels, and the driving motor drives the propulsion wheels to rotate to push the drainage pipeline on the propulsion wheels to move axially on the propulsion assembly.
3. The underground pipe laying device for municipal drainage construction according to claim 2, wherein: the main frame both sides correspond the propulsion wheel and are equipped with U type installation ear, the propulsion wheel rotates to be connected and can rotate by the main frame relatively on U type installation ear, driving motor fixed mounting is in U type installation ear one side, and its output shaft and propulsion wheel fixed transmission are connected and are driven its rotation.
4. An underground pipe-laying apparatus for municipal drainage construction according to any one of claims 1 or 3, wherein: the bottom adjusting component comprises a bottom plate, moving parts and supporting parts, the bottom plate is fixedly installed below the main frame, the moving parts are arranged below the bottom plate and used for being matched with the main frame to move, the supporting parts are symmetrically arranged on two sides of the bottom plate corresponding to the number of the propelling wheels, and the bottom adjusting component is used for jacking and fixing the device.
5. The underground pipe laying device for municipal drainage construction according to claim 4, wherein: the moving parts are follow-up universal wheels, and the number and the installation positions of the moving parts correspond to the supporting parts.
6. The underground pipe laying device for municipal drainage construction according to claim 5, wherein: the support piece is including installation pterygoid lamina and cylinder, the cylinder passes through bolt and clamp fixed mounting on the installation pterygoid lamina, the installation pterygoid lamina is fixed in the bottom plate both sides, the cylinder activity terminal surface evenly is equipped with pricks into the nail.
7. The underground pipe laying device for municipal drainage construction according to claim 6, wherein: the body frame upper surface center has been seted up the installation and has been accepted the chamber, the intracavity symmetry is accepted in the installation is equipped with two sets of accepting rollers, accept the roller both ends and all accept chamber both ends wall with the installation and rotate and be connected, should accept the roller and can rotate for the body frame, when the body frame bore drainage pipe, drainage pipe lower extreme is as for between two sets of accepting rollers.
8. The underground pipe laying device for municipal drainage construction according to claim 7, wherein: the surface of the bearing roller is uniformly provided with a ball mounting seat, auxiliary balls capable of rotating relative to the ball mounting seat are arranged in the ball mounting seat, and the auxiliary balls in the ball mounting seat rotate in a matched mode when the drainage pipeline moves axially.
9. A method of using the municipal drainage construction underground pipe laying apparatus according to claim 8, wherein: the method comprises the following steps:
placing the laying device at a position to be installed, so that the closest distance between the laying device and the last section of drainage pipeline is less than half of the length of the drainage pipeline;
hoisting the drainage pipeline to be connected by using hoisting equipment, placing the drainage pipeline on a laying device, and placing the laying device between two groups of receiving rollers, wherein the laying device bears the middle section of the drainage pipeline to be connected and the lowest end of the drainage pipeline in a flat state is placed between the two groups of receiving rollers;
controlling the cylinder of the support piece to be electrified and extended to enable the prick nail to penetrate into the landmark soil for fixation;
the driving motor is controlled to work to drive the two groups of propelling wheels to rotate to propel the drainage pipeline to move axially to be close to the upper drainage pipeline and to be pushed into the upper drainage pipeline for connection, the purpose of adjusting the installation height of the drainage pipeline can be achieved by adjusting the telescopic amount of the cylinder of the supporting piece in the process, and pipeline laying connection is completed;
controlling the cylinder of the support piece to be electrified and contracted, and pulling out the prick nail to enable the moving piece to be in contact with the ground surface;
the driving motor is controlled to rotate reversely, the supporting piece is not fixed, the drainage pipelines to be connected are connected and fixed, the propelling wheel rotates on the surface of the fixed drainage pipeline to push the whole laying device to move outwards along the drainage pipeline, and the propelling wheel rotates in a matched mode in the process to enable the laying device to move to the tail end of the drainage pipeline to be taken out conveniently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110684644.7A CN113482126B (en) | 2021-06-21 | 2021-06-21 | Underground pipeline laying device for municipal drainage construction and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110684644.7A CN113482126B (en) | 2021-06-21 | 2021-06-21 | Underground pipeline laying device for municipal drainage construction and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113482126A true CN113482126A (en) | 2021-10-08 |
| CN113482126B CN113482126B (en) | 2023-03-14 |
Family
ID=77934183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110684644.7A Active CN113482126B (en) | 2021-06-21 | 2021-06-21 | Underground pipeline laying device for municipal drainage construction and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113482126B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883332A (en) * | 2021-11-16 | 2022-01-04 | 湖北工业大学 | Adjustable support is used in pipe laying for electrical engineering based on it is automatic |
| CN114738554A (en) * | 2022-03-23 | 2022-07-12 | 中铁十九局集团有限公司 | Pipeline support frame and pipeline support system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064968A (en) * | 1976-05-20 | 1977-12-27 | Santa Fe International Corporation | Scaffold for working on a pipeline movable relative to a base |
| CN108302252A (en) * | 2018-02-01 | 2018-07-20 | 合肥通用机械研究院有限公司 | Large bore valves flow test system pipeline holder device |
| CN109237170A (en) * | 2018-11-20 | 2019-01-18 | 乔兴坡 | A kind of water conservancy construction environment-friendly type mud conveying pipeline |
| CN111409771A (en) * | 2020-04-30 | 2020-07-14 | 天津市管道工程集团有限公司 | Transmission transfer equipment for overwater pipeline laying |
-
2021
- 2021-06-21 CN CN202110684644.7A patent/CN113482126B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064968A (en) * | 1976-05-20 | 1977-12-27 | Santa Fe International Corporation | Scaffold for working on a pipeline movable relative to a base |
| CN108302252A (en) * | 2018-02-01 | 2018-07-20 | 合肥通用机械研究院有限公司 | Large bore valves flow test system pipeline holder device |
| CN109237170A (en) * | 2018-11-20 | 2019-01-18 | 乔兴坡 | A kind of water conservancy construction environment-friendly type mud conveying pipeline |
| CN111409771A (en) * | 2020-04-30 | 2020-07-14 | 天津市管道工程集团有限公司 | Transmission transfer equipment for overwater pipeline laying |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883332A (en) * | 2021-11-16 | 2022-01-04 | 湖北工业大学 | Adjustable support is used in pipe laying for electrical engineering based on it is automatic |
| CN114738554A (en) * | 2022-03-23 | 2022-07-12 | 中铁十九局集团有限公司 | Pipeline support frame and pipeline support system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113482126B (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113482126B (en) | Underground pipeline laying device for municipal drainage construction and use method thereof | |
| CN202733170U (en) | Pipeline mounting machine | |
| CN204982667U (en) | Prestressing force rubber tube poling machine | |
| CN210074624U (en) | Cable laying device that stability is high | |
| CN110542886B (en) | Ground penetrating radar special machine tool for shield tunnel grouting detection | |
| CN104947670B (en) | Lifting and clamping mechanism of hydraulic pile planting machine and pile planting method | |
| CN204825897U (en) | Lift clamping mechanism of stake machine is planted to hydraulic pressure | |
| CN204136996U (en) | Can convenient and swift adjustment penstock installation site realize its transport trolley | |
| CN111634824B (en) | Construction equipment connecting device convenient to disassemble and assemble | |
| CN216056734U (en) | Generator rotor pulling tool | |
| CN111502600B (en) | Holding rod traction type integrated oil pumping unit | |
| CN113089803B (en) | A drainage pipe connects auxiliary device for municipal works road plumbing | |
| CN104309617A (en) | Trolley capable of conveniently quickly adjusting installing position of pressure steel pipe and achieving transportation of pressure steel pipe | |
| CN211396667U (en) | Electric installation device for steel bar sleeve connection | |
| CN210369231U (en) | Municipal administration drain pipe is laid and is used pulling equipment | |
| CN209781858U (en) | Pipe jacking machine | |
| CN210716540U (en) | Non-excavation repair equipment's of municipal drainage pipe tractive structure | |
| CN217897337U (en) | Energy-concerving and environment-protective type's wall body positioner for assembly type structure | |
| CN214828430U (en) | Efficient hoisting structure for sewage pipeline construction | |
| CN114857365B (en) | Pipe penetrating structure of directional casing pipe of road buried pipe and operation method | |
| CN110395665A (en) | A kind of rubber tired crane column jack up unit and method | |
| CN214922063U (en) | Press for assembling power box bearing of push bench | |
| CN220042821U (en) | Dredging device for cable laying | |
| CN210855034U (en) | Concrete static cutting hoist device | |
| CN214579263U (en) | Pipeline embedding equipment for hydraulic engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |