CN217813431U - Convenient fixing device of cable logging pulley - Google Patents
Convenient fixing device of cable logging pulley Download PDFInfo
- Publication number
- CN217813431U CN217813431U CN202221769463.0U CN202221769463U CN217813431U CN 217813431 U CN217813431 U CN 217813431U CN 202221769463 U CN202221769463 U CN 202221769463U CN 217813431 U CN217813431 U CN 217813431U
- Authority
- CN
- China
- Prior art keywords
- module
- pulley
- sliding
- hydraulic
- hydraulic cylinder
- 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.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
A convenient fixing device of cable logging pulley includes: the device comprises a chassis module, a top and bottom pulley suspension module arranged on the chassis module and a hydraulic sliding module arranged on one side of the chassis module; wherein, the chassis module is equipped with: the longitudinal beams are arranged oppositely, and the transverse beams are arranged at the two ends of the longitudinal beams; the top and bottom pulley suspension module is provided with a plurality of layers of integral frame structures, and the integral frame structures are arranged on the chassis module; the hydraulic sliding module is provided with: and the hydraulic cylinders are oppositely arranged at the two ends of the longitudinal beam, one side of each hydraulic cylinder is connected with the sliding base at the bottom of the longitudinal beam in the chassis module, and the other side of each hydraulic cylinder is connected with the movable baffle of each hydraulic cylinder. The utility model not only plays the role of hanging the logging pulley, but also realizes the operation without occupying the well mouth in the limited space, thereby reducing the cost of the drilling operation; moreover, batch operation can be realized, logging equipment and personnel are released, and the operation timeliness is improved.
Description
Technical Field
The utility model belongs to the drilling equipment field among the offshore oil engineering especially relates to the convenient fixing device of cable logging pulley.
Background
At present, in the process of well cementation quality and gyro directional measurement operation, because of the influence of operation safety and cost, the following three operation schemes are generally adopted:
(1) The scheme of the wellhead occupying operation comprises the following three steps:
(1) after the drilling operation is finished, respectively installing a top pulley and a ground pulley on a drilling hook and a drilling platform surface, and sequentially penetrating a cable through the ground pulley and the top pulley;
(2) lifting the drilling hook, hoisting the crown block, and sequentially completing instrument connection, in-well measurement and instrument detachment and throwing;
(3) and (5) lowering the drilling hook, detaching the top pulley and the ground pulley, and finishing the operation.
In the scheme, as the hoisting point of the crown block which meets the operation safety condition is not available, only the drilling hook can be occupied as the hoisting point, and therefore, the drilling operation cost is increased.
(2) The crane is used as a hoisting point operation scheme, and the scheme comprises the following steps:
(1) hanging a top pulley by taking a crane hook as a hoisting point above a wellhead of the operation well, and enabling a cable to pass through the top pulley;
(2) lifting a crane hook, lifting a crown block, and completing instrument connection, well entry measurement and instrument detachment and throwing in sequence;
(3) and (5) lowering the hook of the crane, removing the crown block and finishing the operation.
Although the drilling rig time is not occupied, the upper part of a well mouth of the operation well is not shielded, and the suspension arm of the crane can cover; meanwhile, certain potential safety hazards exist, the crane is occupied for a long time, and other production operations of the platform are affected.
(3) The welding hoisting point operation scheme comprises the following steps:
(1) selecting a proper position on a derrick crossbeam above a wellhead of an operation well, and welding a hoisting point of a crown block;
(2) hanging the top pulley on a welded hanging point, and penetrating a cable;
(3) selecting a reasonable position combination instrument according to the height of the top pulley, and completing measurement;
(4) and disassembling the swinging instrument, disassembling the crown block and disassembling the welded hoisting point.
Although this solution does not take up rig time, it is difficult to find a suitable position for welding the suspension point and there is a high safety risk.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a convenient fixing device of cable logging pulley to occupy the drilling operation time when solving well cementation quality logging and top measurement, and there is higher potential safety hazard when not occupying the drilling operation, influences the technical problem of other production operations of platform.
In order to achieve the above object, the utility model discloses a convenient fixing device of cable logging pulley's concrete technical scheme as follows:
a convenient fixing device of cable logging pulley includes: the device comprises a chassis module, a top and bottom pulley suspension module arranged on the chassis module and a hydraulic sliding module arranged on one side of the chassis module; wherein, the chassis module is equipped with: the relative longitudinal beam that sets up the crossbeam at the longitudinal beam both ends, and the world pulley hangs the module and is equipped with: a plurality of layers of integral frame structures, wherein the integral frame structures are arranged on the chassis module; the hydraulic sliding module is provided with: and the hydraulic cylinders are oppositely arranged at the two ends of the longitudinal beam, one side of each hydraulic cylinder is connected with the sliding base at the bottom of the longitudinal beam in the chassis module, and the other side of each hydraulic cylinder is connected with the movable baffle of each hydraulic cylinder.
Furthermore, the longitudinal beams are arranged between the cross beams at two ends at a set distance, the two ends of the longitudinal beams close to the cross beams are made of H-shaped steel, two first pressure-resistant safety plates and two second pressure-resistant safety plates with the thickness of 10mm are connected in grooves at two sides of the H-shaped steel, the two first pressure-resistant safety plates and the two second pressure-resistant safety plates are arranged at a set distance at intervals, and one side of the multilayer integral frame structure is connected with a third pressure-resistant safety plate; and the first pressure-resistant safety plate, the second pressure-resistant safety plate and the third pressure-resistant safety plate are as follows: H200X 10X 14mm high-strength H-shaped steel.
Further, the cross beam is I-shaped steel; the side beam of the I-shaped steel is provided with a sliding rail of the drilling machine.
Further, the longitudinal beams are high-strength H-shaped steel, and the specification of the H-shaped steel is as follows: H300X 10X 15mm.
Furthermore, a plurality of pulley fixing frame connecting plates are correspondingly arranged on the upper side of each longitudinal beam; the bottom of each longitudinal beam is provided with a sliding base which is connected with a sliding rail of the drilling machine; and the length of the two longitudinal beams is as follows: 13.6 meters, the central shaft span of the two longitudinal beams is: 1.8 meters, the whole structure is ladder-shaped; and a plurality of small safety plates with the thickness of 10mm are respectively and vertically connected to the longitudinal beams at the two ends, and the small safety plates are respectively arranged on the two longitudinal beams at intervals; a sliding base is fixed at the bottom of each longitudinal beam, and a plurality of sliding rail connecting stop blocks of the drilling machine are arranged on each sliding base; the sliding base and the sliding rail connecting stop block of the drilling machine are integrally in a C-shaped buckle type. Further, the plurality of layers of the integral frame structure are from bottom to top: the bottom of the frame is a first hollow square frame, the second layer is a second hollow square frame, and the third layer is a third hollow conical frame with a narrow top and a wide bottom; and a plurality of layers of integral frame structures are arranged on the longitudinal beams of the chassis module.
Furthermore, the hydraulic sliding module is a hydraulic driving device connected to the bottom sliding bases at the two ends of the longitudinal beam of the chassis module and consists of a hydraulic cylinder and a movable baffle; the lower edge of the action baffle is provided with a plurality of well drilling machine sliding rail connecting stop blocks, and the hydraulic cylinder action baffle and the well drilling machine sliding rail are integrally in a C-shaped buckling type; and the hydraulic cylinder is a bidirectional SGS light electric hydraulic cylinder, the diameter is 63mm, and the stroke is 1000mm.
Further, a nylon plate is further installed between the sliding base and the platform sliding rail, and the nylon plate is filled with lubricating grease.
Furthermore, the top and bottom pulley suspension module can be split into an upper support frame and a lower support frame; the top and bottom pulley suspension module can integrally and longitudinally move on a sliding rail of the drilling platform along with the chassis module and can also transversely move on the chassis module.
The utility model discloses a convenient fixing device of cable logging pulley has following advantage:
(1) The utility model is convenient to install and disassemble in the limited space, realizes the purpose of not occupying the wellhead operation in the wellhead area, and reduces the operation cost;
(2) The utility model discloses can realize vertically and horizontal ascending removal to, realize that the well logging hoisting point aims at well head central point and puts, the suitability is strong, has ensured operation safety.
(3) The utility model not only plays the role of hanging the logging pulley, but also realizes the operation without occupying the well mouth in the limited space, greatly reduces the drilling operation cost and ensures the operation safety; moreover, batch operation can be realized, logging equipment and personnel are released, and the operation timeliness is greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
fig. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the bolted connection between the top and bottom pulley suspension module and the chassis module of the present invention;
fig. 5 is a schematic view of the connection between the chassis module and the drilling platform guide rail according to the present invention;
fig. 6 is a schematic front view of the pulley fixing frame connecting plate of the present invention;
fig. 7 is a schematic view of the installation of the pulley fixing frame connecting plate of the present invention.
The notation in the figure is:
1. a chassis module; 1.1, longitudinal beams; 1.2, a cross beam; 1.3, a first pressure-resistant safety plate; 1.4, a second anti-pressure safety plate; 1.5, a sliding rail of a drilling machine; 1.6, small safety plate; 1.7 a sliding base; 1.8 A pulley fixing frame connecting plate; 1.9 the sliding rail of the drilling machine is connected with a stop block; 2. a top and bottom pulley suspension module; 2.1, a first layer of square frame; 2.2, a second layer of square frames; 2.3, a third layer of conical frame; 3. a hydraulic slide module; 3.1, a hydraulic cylinder; 3.2, moving the baffle by the hydraulic cylinder.
Detailed Description
In order to understand the utility model discloses a purpose, structure and function better, combine the figure below, it is right to the utility model relates to a convenient fixing device of cable logging pulley does further detailed description.
As shown in fig. 1-7, the utility model comprises: the device comprises a chassis module 1, a top and bottom pulley suspension module 2 and a hydraulic sliding module 3, wherein the top and bottom pulley suspension module 2 and the hydraulic sliding module 3 are installed on the chassis module 1; wherein, chassis module 1 is equipped with: a plurality of (two in this embodiment) longitudinal beams 1.1 arranged oppositely; the transverse beams 1.2 are arranged at the two ends of the longitudinal beams 1.1; the top and bottom pulley suspension module 2 is provided with: a plurality of layers of integral frame structures (three layers in the embodiment) are arranged on the chassis module 1; the hydraulic slide module 3 is provided with: a plurality of hydraulic cylinders 3.1 (two in the embodiment) which are oppositely arranged at the two ends of the longitudinal beam 1.1, one side of each hydraulic cylinder 3.1 is connected with a sliding base 1.7 at the bottom of the longitudinal beam 1.1 in the chassis module 1, and the other side is connected with a movable baffle 3.2 of the hydraulic cylinder 3.1.
The longitudinal beams 1.1 are arranged between the cross beams 1.2 at two ends at a set interval, the longitudinal beams 1.1 are H-shaped steel near the two ends of the cross beams 1.2 and are positioned in the concave grooves at two sides of the H-shaped steel, and two first pressure-resistant safety plates 1.3 and second pressure-resistant safety plates 1.4 which are 10mm thick are connected in a welding mode; the two first pressure-resistant safety plates 1.3 and the second pressure-resistant safety plate 1.4 are arranged at a set distance, and a third pressure-resistant safety plate is connected to one side of the multilayer integral frame structure in a welding mode;
the first compression-resistant safety plate 1.3 and the second compression-resistant safety plate 1.4 are characterized in that the third compression-resistant safety plate adopts 4 specifications: H200X 10X 14mm high strength H-section steel;
the transverse beam 1.2 is I-shaped steel, and the side beam of the I-shaped steel is a sliding rail 1.5 of the drilling machine;
the two longitudinal beams 1.1 are high-strength H-shaped steel, and the specification of the H-shaped steel is as follows: H300X 10X 15mm;
a plurality of pulley fixing frame connecting plates 1.8 are correspondingly arranged on the upper side of each longitudinal beam 1.1, a sliding base 1.7 is arranged at the bottom of each longitudinal beam 1.1, and the sliding base 1.7 is connected with a sliding rail 1.5 of the drilling machine;
the lengths of the two longitudinal beams 1.1 are as follows: 13.6 meters, the central shaft span of the two longitudinal beams 1.1 is: 1.8 meters, the whole structure is ladder-shaped; and on the longitudinal beams 1.1 at both ends, 6 small safety plates 1.6 with the thickness of 10mm are respectively vertically connected by adopting a welding mode, and the small safety plates 1.6 are respectively arranged on the two longitudinal beams 1.1 at intervals.
The bottom of the two ends of each longitudinal beam 1.1 is fixed with a sliding base 1.7 by using a first bolt and nut pair, each sliding base 1.7 is provided with 4 well drilling machine sliding rail connecting baffle blocks 1.9, the well drilling machine sliding rail connecting baffle blocks 1.9 are respectively fixed by using second nuts, and the sliding base 1.7 and the well drilling machine sliding rail connecting baffle blocks 1.9 are integrally in a C-shaped buckle type; the above-mentioned several layers of whole frame construction is by supreme down: the bottom of the frame is a first hollow square frame 2.1, the second layer is a second hollow square frame 2.2, and the third layer is a third hollow conical frame 2.3 with a narrow top and a wide bottom; and a plurality of layers of integral frame structures are arranged on the longitudinal beams 1.1 of the chassis module.
The hydraulic sliding module 3 is a hydraulic driving device connected to sliding bases 1.7 at the bottoms of the two ends of a longitudinal beam of the chassis module and consists of a hydraulic cylinder 3.1 and a hydraulic cylinder moving baffle 3.2; a plurality of well drilling machine sliding rail connecting stop blocks 1.9 are arranged on the lower edge of the hydraulic cylinder action baffle 3.2, and the hydraulic cylinder action baffle 3.2 and the well drilling machine sliding rails 1.5 are integrally in a C-shaped buckle type;
the hydraulic cylinder is selected as follows: the diameter of the bidirectional SGS light electric hydraulic oil cylinder is 63mm, and the stroke is 1000mm.
A nylon plate is further arranged between the sliding base 1.7 and the sliding rail 1.5 of the drilling machine, and the nylon plate is filled with lubricating grease.
The top and bottom pulley suspension module 2 can be divided into an upper support frame and a lower support frame; the top and bottom pulley suspension module 2 can integrally move longitudinally on a drilling platform slide rail along with the chassis module 1 and can also move transversely on the chassis module 1.
The utility model discloses application method in the preparation operation process adopts following step:
the first step is as follows: hoisting the chassis module 1 on a sliding rail of the drilling machine by using a crane, and installing a sliding base 1.7 and a connecting stop block 1.9 of the sliding rail of the drilling machine;
the second step: hanging the top and bottom pulleys on a lower support module on the chassis module 1, hanging and seating the top and bottom pulleys on the chassis module 1, and then fixedly sleeving the top support module and the lower support module;
the third step: installing a hydraulic sliding module 3 and pipeline accessories thereof, and utilizing an adjusting device of the hydraulic sliding module 3 to be at a proper position in the longitudinal direction and fixed;
the fourth step: a pulley fixing frame is utilized to move the device, the adjusting device or the transverse proper position, and the device is fixed;
the fifth step: installing top and bottom pulleys and shuttling cables: the cable passes through the lower edge of the ground pulley, passes through the upper edge of the overhead pulley and is connected with logging equipment of a lower deck. Starting logging operation; wherein, in the fifth step, in the logging operation in-process, the utility model discloses be located the upper deck, it is the well head bearing hoisting point of cable logging.
And a sixth step: after the logging operation is finished, the cable is withdrawn firstly, and then the hydraulic sliding module 3 and the top and bottom pulley suspension module 2 are used for moving to the position of the next operation well, so that the positioning construction of different well mouths is realized.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "transverse", "longitudinal", "up", "down", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The chassis module, the longitudinal beam, the compression-resistant safety plate, the transverse beam, the top and bottom pulley suspension module, the frame hydraulic sliding module, the pulley fixing frame connecting plate, the base sliding block and the sliding rail connecting block are the prior art, and the unexplained technology is the prior art, so the description is omitted.
It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (9)
1. The utility model provides a convenient fixing device of cable logging pulley which characterized in that includes: the device comprises a chassis module, a top and bottom pulley suspension module arranged on the chassis module and a hydraulic sliding module arranged on one side of the chassis module; wherein, the chassis module is equipped with: the longitudinal beams are arranged oppositely, and the transverse beams are arranged at the two ends of the longitudinal beams; the top and bottom pulley suspension module is provided with: a plurality of layers of integral frame structures, and the integral frame structures are arranged on the chassis modules; the hydraulic sliding module is provided with: and the hydraulic cylinders are oppositely arranged at the two ends of the longitudinal beam, one side of each hydraulic cylinder is connected with the sliding base at the bottom of the longitudinal beam in the chassis module, and the other side of each hydraulic cylinder is connected with the movable baffle of each hydraulic cylinder.
2. The convenient cable logging pulley fixing device of claim 1, wherein the longitudinal beams are arranged at a set distance from each other between the cross beams at two ends, the longitudinal beams are H-shaped steel near the two ends of the cross beams, two first pressure-resistant safety plates and two second pressure-resistant safety plates with the thickness of 10mm are connected in grooves at two sides of the H-shaped steel, the two first pressure-resistant safety plates and the two second pressure-resistant safety plates are arranged at a set distance from each other, and a third pressure-resistant safety plate is connected to one side of the multilayer integral frame structure; and the first pressure-resistant safety plate, the second pressure-resistant safety plate and the third pressure-resistant safety plate are as follows: H200X 10X 14 mm.
3. The convenient wireline logging pulley securement device of claim 1, wherein the cross-beam is i-steel; the side beam of the I-shaped steel is a sliding rail of the drilling machine.
4. The convenient fixing device for the cable logging pulley according to claim 1 or 2, wherein the longitudinal beam is high-strength H-shaped steel, and the specification of the H-shaped steel is as follows: H300X 10X 15mm.
5. The convenient fixing device for the cable logging pulley according to claim 1 or 2, wherein a plurality of pulley fixing frame connecting plates are correspondingly arranged on the upper side of each longitudinal beam, and a sliding base is arranged at the bottom of each longitudinal beam at two ends and connected with a sliding rail of a drilling machine; and the length of the two longitudinal beams is as follows: 13.6 m, the central shaft span of the two longitudinal beams is as follows: 1.8 meters, the whole structure is ladder-shaped; and a plurality of small safety plates with the thickness of 10mm are respectively and vertically connected to the longitudinal beams at the two ends, and the small safety plates are respectively arranged on the two longitudinal beams at intervals; a sliding base is fixed at the bottom of each longitudinal beam, and a plurality of sliding rail connecting stop blocks of the drilling machine are arranged on each sliding base; the sliding base and the sliding rail connecting stop block of the drilling machine are integrally in a C-shaped buckle type.
6. The convenient and fast cable logging pulley fixing device according to claim 1, wherein the plurality of layers of integral frame structures are, from bottom to top: the bottom of the frame is a first hollow square frame, the second layer is a second hollow square frame, and the third layer is a third hollow conical frame with a narrow top and a wide bottom; and a plurality of layers of integral frame structures are arranged on the longitudinal beams of the chassis module.
7. The convenient fixing device for the cable logging pulley according to claim 1, wherein the hydraulic sliding module is a hydraulic driving device connected to a chassis module and a bottom sliding base at two ends of a longitudinal beam, and the hydraulic driving device is composed of a hydraulic cylinder and a hydraulic cylinder movable baffle; the lower edge of the hydraulic cylinder action baffle is provided with a plurality of well drilling machine sliding rail connecting stop blocks, and the hydraulic cylinder action baffle and the well drilling machine sliding rails are integrally in a C-shaped buckling type; and the hydraulic cylinder is: the diameter of the bidirectional SGS light electric hydraulic oil cylinder is 63mm, and the stroke is 1000mm.
8. The convenient fixing device of cable logging pulley of claim 1, characterized in that, a nylon plate is further installed between the sliding base and the platform slide rail, and the nylon plate is filled with lubricating grease.
9. The convenient and fast cable logging pulley fixing device according to claim 1, wherein the top and bottom pulley suspension module is capable of being separated into an upper support frame and a lower support frame; the top and bottom pulley suspension module can integrally and longitudinally move on a sliding rail of the drilling platform along with the chassis module and can also transversely move on the chassis module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221769463.0U CN217813431U (en) | 2022-07-11 | 2022-07-11 | Convenient fixing device of cable logging pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221769463.0U CN217813431U (en) | 2022-07-11 | 2022-07-11 | Convenient fixing device of cable logging pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217813431U true CN217813431U (en) | 2022-11-15 |
Family
ID=83965160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221769463.0U Active CN217813431U (en) | 2022-07-11 | 2022-07-11 | Convenient fixing device of cable logging pulley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217813431U (en) |
-
2022
- 2022-07-11 CN CN202221769463.0U patent/CN217813431U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101974913B (en) | Parallel construction method of bridge deepwater foundation bored pile and cofferdam | |
| JP4515996B2 (en) | Method and apparatus for erection of elevated bridge | |
| CN107313360B (en) | Sliding cable type support-free support replacing operation platform | |
| CN104632088A (en) | Petroleum drilling machine tower-shaped derrick sleeving mounting method | |
| CN104831632B (en) | A kind of bridge cable tower entablature and sill construction method | |
| CN115596463A (en) | Arch frame installation device for repairing operated tunnel defects | |
| CN201436274U (en) | Special assembling suspender of long chain for slab rolling mill engineering steel plate conveying device | |
| CN102190249A (en) | Method for hoisting equipment positioned at bottom of multilayer frame platform | |
| CN112030777B (en) | Descending movable formwork support bracket crossing type transfer construction method | |
| CN217813431U (en) | Convenient fixing device of cable logging pulley | |
| CN210001467U (en) | Hoisting device used in limited space workshop | |
| CN110127530A (en) | For hanging apparatus and its application method in restricted clearance workshop | |
| CN113958131B (en) | Suspended ceiling structure of steel structure truss string system roof and construction method thereof | |
| CN210366808U (en) | Lifting and dismantling device for rail walking | |
| CN214143337U (en) | Installation device of composite cable saddle of narrow cavern of mountain suspension bridge | |
| JP2020153208A (en) | Suspended scaffold and erection method therefor | |
| CN215755931U (en) | Large transformer hoisting equipment in factory building | |
| CN108821127A (en) | The devices and methods therefor of disassembly lifting open type TBM in a kind of hole | |
| CN211872614U (en) | Bridge bottom construction maintenance equipment | |
| CN114751295A (en) | Method for hoisting cluster type large-scale equipment of ethylene glycol synthesis device | |
| CN211198379U (en) | Simple and easy track hoist device | |
| CN210563326U (en) | Overhead unit type overhead sliding splicing operation platform | |
| CN208182475U (en) | Prefabricated box girder steel strand stretching operation platform | |
| CN112850476A (en) | Hoisting method of shield tunneling machine equipment | |
| CN220264848U (en) | Building internal construction elevator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |