CN112475751A - Pi-shaped beam overturning tool for parallel four-bar crane - Google Patents
Pi-shaped beam overturning tool for parallel four-bar crane Download PDFInfo
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- CN112475751A CN112475751A CN202011497815.7A CN202011497815A CN112475751A CN 112475751 A CN112475751 A CN 112475751A CN 202011497815 A CN202011497815 A CN 202011497815A CN 112475751 A CN112475751 A CN 112475751A
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- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 230000007306 turnover Effects 0.000 claims abstract description 16
- 238000010030 laminating Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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Abstract
The utility model provides a parallel four-bar crane pi-shaped roof beam upset frock, includes the chassis, sets up hoist mechanism and tilting mechanism on the chassis, hoist mechanism is connected by hoisting frame and promotion actuating mechanism and is constituted, tilting mechanism is connected by upset part and upset driver part and is constituted, the upset part includes that the structure is the same and two upset arms that hinge in hoisting frame upper portion intermediate position are reversed, the upset arm is including the connecting portion that is used for connecting hoisting frame and upset driver part, fix the upset portion that is used for when the upset with pi-shaped roof beam web or upper cover plate laminating on connecting portion. The invention has the advantages of high turnover efficiency, time and labor saving, low manufacturing cost and safe and convenient use.
Description
Technical Field
The invention belongs to the technical field of crane production and manufacturing, and particularly relates to a pi-shaped beam overturning tool of a parallel four-bar crane.
Background
The crane is indispensable mechanical equipment in various engineering constructions, and is widely applied to the fields of cargo handling inside various workshops, port loading and unloading, road and bridge construction and the like. The crane girder is mainly formed by welding an upper cover plate, a lower cover plate, a web plate and a partition plate, and the general girder welding procedure is as follows: firstly, planting rib plates on an upper cover plate; then, welding the upper cover plate and the two side webs (at this time, the upper cover plate and the two side webs are welded into a pi shape, so that the upper cover plate and the two side webs are called as a pi-shaped beam); and finally, welding the lower cover plate to complete the welding of the main beam. In order to improve the quality of the welding seams of the main beam and ensure the strength of the main beam, all the welding seams adopt a flat welding posture as far as possible. Therefore, the Pi-shaped beam needs to be turned and adjusted in posture according to the position of a welding seam, a crown block is matched with a special lifting appliance in a traditional production mode, bottom surface manual traction is used for assisting in turning, and the turning and posture adjusting mode is large in labor amount, long in consumed time and poor in safety, so that a special tool capable of completing turning and posture adjusting of the Pi-shaped beam of the crane is urgently needed.
Disclosure of Invention
In order to solve the problems, the Pi-shaped beam overturning tool for the parallel four-bar crane is provided.
The object of the invention is achieved in the following way:
the utility model provides a parallel four-bar crane pi-shaped roof beam upset frock, includes the chassis, sets up hoist mechanism and tilting mechanism on the chassis, hoist mechanism is connected by hoisting frame and promotion actuating mechanism and is constituted, tilting mechanism is connected by upset part and upset driver part and is constituted, the upset part includes that the structure is the same and two upset arms that hinge in hoisting frame upper portion intermediate position are reversed, the upset arm is including the connecting portion that is used for connecting hoisting frame and upset driver part, fix the upset portion that is used for when the upset with pi-shaped roof beam web or upper cover plate laminating on connecting portion.
The connecting part and the overturning part are integrally arranged, a first hinge hole connected with the lifting frame and a second hinge hole connected with the overturning part are respectively arranged on the connecting part, and the second hinge hole is positioned at the end part of the lower end of the connecting part; a cushion pad is arranged on the lower surface of one end, far away from the hinge hole, of the turnover part.
The upper surface of the overturning part is provided with a notch, and the notch accommodates the protruding part of the upper cover plate of the pi-shaped beam.
The lifting frame is of a welded-together rectangular frame structure and comprises two upper cross beams, two lower cross beams, a stand column for connecting the upper cross beams and the lower cross beams, and a longitudinal beam for connecting the two lower cross beams together; and a third hinge hole is formed in the middle position of the upper cross beam and is hinged with the first hinge hole of the turnover arm through a pin shaft.
And a fourth hinge hole is formed in the lower cross beam and is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with a fifth hinge hole formed in the side face of the chassis.
The overturning driving part adopts two overturning oil cylinders, one end of each oil cylinder is connected with an overturning oil cylinder hinged support symmetrically distributed on one side of the lifting frame, and a piston rod at the other end of each oil cylinder is hinged with a second hinged hole of the overturning arm.
The lifting driving mechanism is a lifting oil cylinder, one end of the oil cylinder is hinged with a hinged support welded on the upper surface of one end of the chassis, and a piston rod at the other end is hinged with a hinged support which is arranged on one side of the lifting frame and used for fixing the lifting oil cylinder.
The chassis is a square tube welded door-shaped frame structure.
The device comprises a base, a rail, a connection steel and a driving mechanism, wherein the rail is arranged on the foundation and is matched with the idler wheels, the idler wheels are arranged on four corners below the base, the rail is arranged on the foundation and is matched with the idler wheels, the driving mechanism comprises a first horizontal oil cylinder and a second horizontal oil cylinder, oil cylinder hinged supports used for connecting the first horizontal oil cylinder and the second horizontal oil cylinder are respectively arranged at two ends of the connection steel, the oil cylinder hinged support of the first horizontal oil cylinder is positioned at the upper part of one side of the connection steel and is connected with a piston rod of the first horizontal oil cylinder, the other end of the first horizontal oil cylinder is connected to a chassis, and the lower surface of one end, provided with the hinged support of the lifting oil cylinder; and the oil cylinder hinged support of the second horizontal oil cylinder is positioned at the lower part of the other side of the connection steel and is connected with a piston rod of the second horizontal oil cylinder, the other end of the second horizontal oil cylinder is connected with a second horizontal oil cylinder seat at one end of the foundation, the second horizontal oil cylinder seat comprises a round hole hinged with the second horizontal oil cylinder, and the bottom surface of the horizontal oil cylinder seat is welded on the foundation embedded installation iron base.
The section of the connection steel main body is of an I-shaped strip structure.
The invention has the beneficial effects that: compared with the prior art, the invention has the advantages of high turnover efficiency, time and labor saving, low manufacturing cost and safe and convenient use.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the invert arm of the present invention.
Fig. 3 is a schematic structural view of the hoisting frame of the present invention.
Fig. 4 is a schematic structural view of the connection steel of the present invention.
Fig. 5 is a schematic diagram of the turning tool set in use according to the present invention.
Fig. 6 is a schematic diagram a of the working state of the present invention.
Fig. 7 is a schematic diagram B of the working state of the present invention.
Fig. 8 is a schematic diagram C of the operating state of the present invention.
Fig. 9 is a schematic diagram D of the working state of the present invention.
Fig. 10 is a schematic view E of the operating state of the present invention.
Fig. 11 is a schematic diagram F of the operating state of the present invention.
Fig. 12 is a schematic diagram G of the operating state of the present invention.
Fig. 13 is a schematic diagram F of the operating state of the present invention.
Wherein, 1 is a turnover arm; 2 is a lifting frame, 21 is an upper cross beam, 22 is a lower cross beam, 23 is a vertical column, 24 is a longitudinal beam, 25 is a third hinge hole, 26 is a fourth hinge hole, 27 is a turnover cylinder hinge support, 28 is a hinge support for fixing a lifting cylinder, 3 is a lifting cylinder, 4 is a chassis, 41 is a fifth hinge hole, 42 is a lifting cylinder hinge support, 5 is a roller, 6 is a track, 7 is a foundation, 8 is a connecting rod, 9 is connection steel, 91 is a cylinder hinge support of a first horizontal cylinder, 93 is a semicircular notch, 92 is a cylinder hinge support of a second horizontal cylinder, 10 is a second horizontal cylinder, 11 is a second horizontal cylinder support, 12 is a turnover cylinder, 13 is a first hinge hole, 14 is a second hinge hole, 15 is a cushion, 16 is a notch, 17 is a first horizontal cylinder, and 18 is a pi-shaped beam.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same technical meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be further understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the respective parts or elements of the present invention, and are not intended to refer to any part or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. To simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
FIG. 1 is a schematic structural diagram of a Pi-shaped beam overturning tool of a parallel four-bar crane, which comprises a chassis 4, a lifting mechanism and an overturning mechanism, wherein the lifting mechanism and the overturning mechanism are arranged on the chassis 4, the lifting mechanism is formed by connecting a lifting frame 2 and a lifting driving mechanism, the overturning mechanism is formed by connecting an overturning part and an overturning driving part, and the lifting frame is provided with an overturning part capable of overturning relative to the lifting frame; the overturning part comprises two overturning arms 1 which are the same in structure and are reversely hinged to the middle position of the upper portion of the lifting frame, and the overturning arms are respectively a first overturning arm and a second overturning arm, wherein the overturning arms 1 comprise connecting portions used for connecting the lifting frame and the overturning driving part, and overturning portions fixed on the connecting portions and used for being attached to a pi-shaped beam web or an upper cover plate when being overturned.
Furthermore, the overturning arm is in a hollow gun shape with a rib plate inside, the connecting part and the overturning part are integrally arranged and consist of two side plates and an upper surface plate, a first hinge hole 13 connected with the lifting frame and a second hinge hole 14 connected with the overturning part are respectively arranged on the side plate where the connecting part is located, and the second hinge hole 14 is located at the end part of the lower end of the connecting part; the lower surface of one end of the overturning part far away from the hinge hole is fixed with a cushion pad 15 with a certain thickness through pasting or countersunk head screws, and the cushion pad 15 is made of materials with good elasticity such as rubber or nylon. The plane of the first hinge hole 13 and the second hinge hole 14 forms an obtuse included angle with the plane of the first hinge hole 13 and the plane of the other end far away from the first hinge hole 13.
The upper surface of the overturning part is provided with a notch 16, and the notch 16 receives the protruding part of the upper cover plate of the pi-shaped beam, so that the web plate of the pi-shaped beam can be completely attached to the upper surface of the overturning arm.
The lifting frame 2 is of a welded and integrated rectangular frame type structure and comprises two upper cross beams 21, two lower cross beams 22, a stand column 23 for connecting the upper cross beams and the lower cross beams, and a longitudinal beam 24 for connecting the two lower cross beams together; and a third hinge hole 25 is formed in the middle position of the upper cross beam, and the third hinge hole 25 is hinged to the first hinge hole 13 of the turnover arm 1 through a pin shaft.
The lower cross beam 22 is provided with 2 groups of fourth hinge holes 26, the fourth hinge holes 26 are hinged with one end of the connecting rod 8, and the other end of the connecting rod 8 is hinged with a fifth hinge hole 41 arranged on the side surface of the chassis 4.
The overturning driving part adopts two overturning oil cylinders 12, one end of each overturning oil cylinder is connected with an overturning oil cylinder hinged support 27 arranged on one side of the lifting frame 2, and a piston rod at the other end is hinged with the second hinged hole 14 of the overturning arm 1. The hinged supports 27 of the turning oil cylinders are 2 and are symmetrically arranged on the longitudinal beams on the side edges of the lifting frame.
The lifting driving mechanism is a lifting oil cylinder 3, one end of the oil cylinder is hinged with a hinged support 42 welded on the upper surface of one end of the chassis 4, and a piston rod at the other end is hinged with a hinged support 28 which is arranged at one side of the lifting frame 2 and used for fixing the lifting oil cylinder.
The chassis 4 is square tube welded gate type frame construction, welds one on the upper surface of 4 one ends on the chassis and can with lift cylinder 3 articulated lift cylinder hinged-support 42, the chassis sets up the one end lower surface welding of lift cylinder hinged-support 42 and can be used to install the hinged-support of horizontal hydro-cylinder, the chassis 4 side is provided with two fifth hinge holes 41 that run through of connecting rod 8.
The device comprises a base, a rail 6, a connection steel 9 and a driving mechanism, wherein the rail 6 is arranged on a foundation 7 and matched with the roller 5, the roller 5 is arranged on four corners below the base, the driving mechanism comprises a first horizontal oil cylinder and a second horizontal oil cylinder, oil cylinder hinged supports used for connecting the first horizontal oil cylinder and the second horizontal oil cylinder are respectively arranged at two ends of the connection steel 9, an oil cylinder hinged support 91 of the first horizontal oil cylinder is positioned at the upper part of one side of the connection steel and connected with a piston rod of the first horizontal oil cylinder, the other end of the first horizontal oil cylinder is connected to a chassis 4, and a hinged support of the first horizontal oil cylinder is welded on the lower surface of one end, provided with a hinged support of a lifting oil cylinder, of the chassis; and the oil cylinder hinged support 92 of the second horizontal oil cylinder is positioned at the lower part of the other side of the connecting steel and is connected with a piston rod of the second horizontal oil cylinder, and the other end of the second horizontal oil cylinder is connected with the second horizontal oil cylinder seat 11 at one end of the foundation 7.
The horizontal oil cylinder base 11 is a support part with a round hole at one end, the round hole can be hinged with the round hole at the end part of the horizontal oil cylinder, and the bottom surface of the horizontal oil cylinder base is welded on a foundation embedded mounting iron base.
The section of the steel main body is of an I-shaped strip structure, and semicircular notches 93 are formed in the mounting positions of the oil cylinder pins at the two ends of the connecting steel.
The working process of the invention is as follows:
as shown in FIG. 5, the turning tools of the invention need to be used in groups, a certain number of turning tools can be used to form a working group according to the size and model of the pi-shaped beam of the crane to be turned, and corresponding oil cylinders in the tools in the same group are synchronously controlled and synchronously moved during use, so that the whole turning process is stable and ordered; before turning over, as shown in fig. 6;
controlling a turnover oil cylinder connected with the first turnover arm to push out (or contract) the piston rod for a certain stroke, driving the first turnover arm connected with the turnover oil cylinder to turn over for 90 degrees, and enabling the upper surface of the turnover arm to be attached to the pi-shaped beam web plate, as shown in fig. 7;
controlling the lifting oil cylinder 3 to push out the piston, enabling the lifting frame to move upwards in a translation manner, and lifting the whole pi-shaped beam to a certain height, as shown in figure 8;
synchronously controlling the two overturning oil cylinders to contract (or push out) the pistons for a certain stroke, driving the two overturning arms 1 to overturn by the oil cylinders, and ensuring that the upper surfaces of the overturning parts of the two overturning arms are always 90 degrees in the whole overturning process, so that the upper surfaces of the overturning parts of the two overturning arms can be always attached to the corresponding plane of the pi-shaped beam, as shown in figures 9 and 10;
after the overturning is finished, controlling a horizontal oil cylinder to stretch and drive an overturning tool to translate to a required position, wherein the horizontal oil cylinder comprises a first horizontal oil cylinder and a second horizontal oil cylinder, controlling the first horizontal oil cylinder to push out (or contract) a piston rod for a certain stroke, integrally moving the overturning tool for a first distance, controlling the second horizontal oil cylinder to push out (or contract) the piston rod for a certain stroke, and integrally moving the overturning tool for a second distance, as shown in fig. 11;
controlling the lifting oil cylinder to contract to enable the lifting frame to descend, as shown in FIG. 12;
the overturning cylinder is controlled to push out (or contract) the piston, the overturning arm is driven to reset to the horizontal position, and the overturning process is completed, as shown in fig. 13.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations of the technical features should be considered as being within the scope described in the present specification, and when the combinations of the technical features are contradictory or cannot be realized, the combinations of the technical features should be considered as not being present, and the combinations of the technical features are not within the scope of the claims. Also, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit of the principles of the invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a parallel four-bar crane pi roof beam upset frock which characterized in that: including the chassis, set up hoist mechanism and tilting mechanism on the chassis, hoist mechanism is connected by hoisting frame and promotion actuating mechanism and constitutes, tilting mechanism is connected by upset part and upset driver part and constitutes, the upset part includes that the structure is the same and reverse articulates the upset arm at hoisting frame upper portion intermediate position, the upset arm is including the connecting portion that is used for connecting hoisting frame and upset driver part, fix the upset portion that is used for when the upset with pi-shaped roof beam web or upper cover plate laminating on connecting portion.
2. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the connecting part and the overturning part are integrally arranged, a first hinge hole connected with the lifting frame and a second hinge hole connected with the overturning part are respectively arranged on the connecting part, and the second hinge hole is positioned at the end part of the lower end of the connecting part; a cushion pad is arranged on the lower surface of one end, far away from the hinge hole, of the turnover part.
3. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the upper surface of the overturning part is provided with a notch, and the notch accommodates the protruding part of the upper cover plate of the pi-shaped beam.
4. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the lifting frame is of a welded-together rectangular frame structure and comprises two upper cross beams, two lower cross beams, a stand column for connecting the upper cross beams and the lower cross beams, and a longitudinal beam for connecting the two lower cross beams together; and a third hinge hole is formed in the middle position of the upper cross beam and is hinged with the first hinge hole of the turnover arm through a pin shaft.
5. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 4, wherein: and a fourth hinge hole is formed in the lower cross beam and is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with a fifth hinge hole formed in the side face of the chassis.
6. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the overturning driving part adopts two overturning oil cylinders, one end of each oil cylinder is connected with an overturning oil cylinder hinged support symmetrically distributed on one side of the lifting frame, and a piston rod at the other end of each oil cylinder is hinged with a second hinged hole of the overturning arm.
7. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the lifting driving mechanism is a lifting oil cylinder, one end of the oil cylinder is hinged with a hinged support welded on the upper surface of one end of the chassis, and a piston rod at the other end is hinged with a hinged support which is arranged on one side of the lifting frame and used for fixing the lifting oil cylinder.
8. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the chassis is a square tube welded door-shaped frame structure.
9. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 1, wherein: the device comprises a base, a rail, a connection steel and a driving mechanism, wherein the rail is arranged on the foundation and is matched with the idler wheels, the idler wheels are arranged on four corners below the base, the rail is arranged on the foundation and is matched with the idler wheels, the driving mechanism comprises a first horizontal oil cylinder and a second horizontal oil cylinder, oil cylinder hinged supports used for connecting the first horizontal oil cylinder and the second horizontal oil cylinder are respectively arranged at two ends of the connection steel, the oil cylinder hinged support of the first horizontal oil cylinder is positioned at the upper part of one side of the connection steel and is connected with a piston rod of the first horizontal oil cylinder, the other end of the first horizontal oil cylinder is connected to a chassis, and the lower surface of one end, provided with the hinged support of the lifting oil cylinder; and the oil cylinder hinged support of the second horizontal oil cylinder is positioned at the lower part of the other side of the connection steel and is connected with a piston rod of the second horizontal oil cylinder, the other end of the second horizontal oil cylinder is connected with a second horizontal oil cylinder seat at one end of the foundation, the second horizontal oil cylinder seat comprises a round hole hinged with the second horizontal oil cylinder, and the bottom surface of the horizontal oil cylinder seat is welded on the foundation embedded installation iron base.
10. The pi-shaped beam overturning tool for the parallel four-bar crane according to claim 9, wherein: the section of the connection steel main body is of an I-shaped strip structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011497815.7A CN112475751B (en) | 2020-12-17 | 2020-12-17 | Pi-shaped beam overturning tool for parallel four-bar crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011497815.7A CN112475751B (en) | 2020-12-17 | 2020-12-17 | Pi-shaped beam overturning tool for parallel four-bar crane |
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| CN112475751A true CN112475751A (en) | 2021-03-12 |
| CN112475751B CN112475751B (en) | 2024-08-02 |
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Cited By (1)
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| CN114476543A (en) * | 2022-01-20 | 2022-05-13 | 中电建南方建筑科技有限公司 | Attitude overturning equipment for prefabricated part of 140 t-level assembly type subway station |
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|---|---|---|---|---|
| CN114476543A (en) * | 2022-01-20 | 2022-05-13 | 中电建南方建筑科技有限公司 | Attitude overturning equipment for prefabricated part of 140 t-level assembly type subway station |
| CN114476543B (en) * | 2022-01-20 | 2024-04-02 | 中电建南方建筑科技有限公司 | Gesture tipping arrangement of prefabricated component of 140t level assembled subway station |
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| Publication number | Publication date |
|---|---|
| CN112475751B (en) | 2024-08-02 |
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