CN221216811U - Prefabricated box girder protection hanger - Google Patents
Prefabricated box girder protection hanger Download PDFInfo
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- CN221216811U CN221216811U CN202323015884.1U CN202323015884U CN221216811U CN 221216811 U CN221216811 U CN 221216811U CN 202323015884 U CN202323015884 U CN 202323015884U CN 221216811 U CN221216811 U CN 221216811U
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Abstract
The utility model relates to a prefabricated box girder protection lifting appliance, which comprises a flange plate protection device arranged at a selected lifting point position of a prefabricated box girder, wherein the flange plate protection device comprises a main beam, the left end of the main beam is provided with a left crank arm, the right end of the main beam is provided with a right crank arm, the lower ends of the left crank arm and the right crank arm are provided with a bending part, the bending part is arranged at the lower side of an upper wing plate of the prefabricated box girder, the bending part is provided with a fixing component so that the flange plate protection device is clamped and fixed with the upper wing plate, and the lower side of the bending part is fixedly connected with a pull ring; the bottom plate protection device is further provided with a bottom plate protection device, and comprises a flexible strip-shaped piece arranged at the bottom of the bottom web plate of the prefabricated box girder, one end of the flexible strip-shaped piece is connected with a pull ring of the right crank arm, the other end of the flexible strip-shaped piece is connected with a pull ring of the left crank arm, corner protection steel plates are arranged on corners, corresponding to two sides of the bottom web plate, of the flexible strip-shaped piece, and a rope tightener is arranged on the flexible strip-shaped piece; the main hoisting steel wire rope is arranged, the main hoisting steel wire rope bypasses the bottom of the prefabricated box girder, two ends of the main hoisting steel wire rope are connected with the overhead travelling crane hanging girder, and the main hoisting steel wire rope is sleeved with a flange plate protection device and the bottom plate protection device.
Description
Technical Field
The utility model belongs to the field of bridge engineering, and particularly relates to a prefabricated box girder protection lifting appliance.
Background
Bridge erection is an important traffic engineering, and the bridge is generally manufactured in a segmented mode due to the fact that the total length of the bridge is large, box girder pouring is conducted in working, and prefabricated box girders of all the produced segments are transported to the site to be installed.
Along with the rapid development of the precast box girder technology, the span, the size and the single girder weight of the precast box girder are continuously increased, the traditional hoisting adopts a lifting hook and a steel wire rope for hoisting, and because the stress of the contact point is larger, in order to avoid the damage of the steel wire rope to the precast box girder, steel plates, rubber plates and the like are arranged at the contact point of the steel wire rope and the girder body in a cushioning manner to protect the girder body, but when the precast girder with larger single girder weight is hoisted, the effect of the cushion plate protection measures is very small. At present, a lifting appliance is adopted to fix a box girder, a steel wire rope is connected with the lifting appliance and does not directly contact the box girder, so that the damage to the box girder is avoided, as in a Chinese patent CN202221128907.2, a precast box girder lifting appliance is disclosed, a girder rod frame body is fixed on an upper wing plate of the precast box girder, an outer suspension structure on two sides of the upper wing plate is utilized, and the outer suspension structure is hooked by the frame body, but the structure is fixed by only making the upper wing plate, the main weight of the box girder is in a box body part at the lower part, the stress at two sides of the upper wing plate is concentrated in the lifting process, the concrete still has a cracking phenomenon, and the later repairing quality of the upper wing plate is difficult to guarantee.
Disclosure of Invention
The utility model aims to solve the problems that the existing prefabricated box girder hoisting tool is required to be connected with a box girder in a destructive manner or is easy to damage due to stress concentration of a hoisting tool fixing point.
The utility model solves the problems, and adopts the following technical scheme:
The utility model provides a prefabricated box girder protection hoist, including setting up the flange plate protection device in the prefabricated box girder selected hoisting point position, flange plate protection device includes the main beam, and the main beam left end is provided with left turning arm, and the right-hand member is provided with right turning arm, and left turning arm, right turning arm lower extreme are equipped with the bending part, and the bending part sets up in prefabricated box girder upper wing board downside, and the bending part is provided with fixed subassembly thereby makes flange plate protection device card solid upper wing board, and bending part downside rigid coupling has the pull ring; the bottom plate protection device comprises a flexible strip-shaped piece arranged at the bottom of a bottom web of the prefabricated box girder, one end of the flexible strip-shaped piece is connected with a pull ring of a right crank arm, the other end of the flexible strip-shaped piece is connected with a pull ring of a left crank arm, corner protection steel plates are arranged on corners, corresponding to two sides of the bottom web, of the flexible strip-shaped piece, and a rope tightener is arranged on the flexible strip-shaped piece; the main hoisting steel wire rope is arranged, the main hoisting steel wire rope bypasses the bottom of the prefabricated box girder, two ends of the main hoisting steel wire rope are connected with the overhead travelling crane hanging girder, and the main hoisting steel wire rope is sleeved with a flange plate protection device and the bottom plate protection device.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:
The hoist that this scheme provided adopts the parcel nature fixed to the case roof beam body, does not produce destructive connection, can protect the point that all stress concentrates of prefabricated case roof beam hoisting point, and main hoisting wire rope and upper wing board both sides position are kept apart to left turning arm, right turning arm, avoids upper wing board hoisting point position because of stress concentration is cut by main hoisting wire rope, and the turning protection steel sheet avoids main hoisting wire rope to cut case roof beam bottom to the prefabricated case Liang Lianghao that the protection handling is taken one's place is harmless.
Preferably, the invention further adopts the technical scheme that:
The flexible strip-shaped piece is a protection steel wire rope, the protection steel wire rope is divided into a left rope portion, a right rope portion and a middle portion, two corner protection steel plates are respectively connected to two ends of the middle portion, the left rope portion is connected with the corner protection steel plates on the left side of the bottom web of the prefabricated box girder and the pull ring of the left crank arm, the right rope portion is connected with the corner protection steel plates on the right side of the bottom web of the prefabricated box girder and the pull ring of the right crank arm, and the left rope portion and the right rope portion are respectively provided with a rope tightener.
The beneficial effects obtained by the above features are that: the three-section type protection steel wire rope is convenient to install, and the left rope tightener and the right rope tightener can adjust the tension at the two ends of the protection steel wire rope to balance the stress.
The upper ends of the left rope part and the right rope part are provided with hooks which are hooked on the pull ring.
The beneficial effects obtained by the above features are that: the connection mode of the hook and the pull ring is convenient for installation and disassembly.
One side of the left crank arm and one side of the right crank arm, which are close to the upper wing plate, are provided with rubber pads.
The beneficial effects obtained by the above features are that: the rubber pad plays the cushioning effect, avoids the rigid crank arm to produce the damage to the case roof beam.
The end part of the main beam and the outer sides of the right crank arm and the left crank arm are provided with first clamping grooves which are vertically communicated, and the upper part of the main hoisting steel wire rope is arranged in the first clamping grooves.
The beneficial effects obtained by the above features are that: the position of the free end on the main hoisting steel wire is well stabilized by the first clamping groove, and the steel wire rope is prevented from shifting due to shaking in the hoisting process.
The outer surface of the corner protection steel plate is provided with a second clamping groove, and the bottom of the main hoisting steel wire rope is arranged in the second clamping groove.
The beneficial effects obtained by the above features are that: the second clamping groove prevents the bottom of the main hoisting steel wire rope from being separated from the protection steel plate, and especially can prevent the main hoisting steel wire rope from being tightened when being hoisted, from being inclined or even displaced due to unbalance, and prevent the main hoisting steel wire rope from being directly tied on the bottom web concrete of the box girder.
The fixing assembly comprises a transverse supporting bolt and a vertical supporting bolt, the outer end of the transverse supporting bolt is in threaded connection with the bending part, the inner end of the transverse supporting bolt is provided with a pressing plate through a ball shaft, and the pressing plate is in butt joint with a side web plate of the prefabricated box girder; the lower end of the vertical supporting bolt is in threaded connection with the bending part, and the upper end of the vertical supporting bolt is abutted to the bottom surface of the upper wing plate.
The beneficial effects obtained by the above features are that: the fixing assembly locks the protection device on the box girder through the vertical supporting bolt, and the horizontal supporting bolt outwards supports the crank arm, so that the crank arm is mutually opposed to the main hoisting steel wire rope, and the crank arm can effectively support the main hoisting steel wire rope.
The middle point of the overhead travelling crane hanging beam is connected with an overhead travelling crane hanging steel wire; a plurality of hanging holes are symmetrically formed on two sides of the overhead travelling crane hanging beam based on the middle point; the main hanging pin shafts are arranged in the hanging holes, two ends of the main hanging steel wire rope are provided with steel wire rope sleeves, the steel wire rope sleeves are hung on the main hanging pin shafts, two main hanging pin shafts for installing the main hanging steel wire rope are arranged in the two symmetrical hanging holes, and the distance between the two main hanging pin shafts is equal to the width of the upper wing plate.
The beneficial effects obtained by the above features are that: the main hanging steel wire rope is hung by the overhead crane hanging beam, the main hanging steel wire rope vertically descends through the main hanging pin shaft, the stability of the steel wire rope is guaranteed through the first clamping groove, and the pressure of the steel wire rope on the side part of the box beam is reduced.
The main beam telescopic beam body consists of a left beam body, a right beam body and a core beam, wherein a plurality of reserved holes are formed in the core beam, the left beam body and the right beam body at equal intervals, and locking pin shafts are installed in the reserved holes which are coincident with the left beam body, the right beam body and the core beam in a penetrating manner.
The beneficial effects obtained by the above features are that: the length of the main beam of the embodiment is adjustable, so that the protective lifting tool can be used for different box beams, and the telescopic structure is convenient to manufacture.
The upper end and the lower end of the first clamping groove are arc-shaped bends bending towards the direction far away from the main hoisting steel wire rope, the left crank arm and the right crank arm are connected with the main cross beam through bolts, the bolt joints are movable joints, and the left crank arm and the right crank arm conduct pressure inwards according to the lateral pressure of the main hoisting steel wire rope on the outer side of the left crank arm and the right crank arm.
The beneficial effects obtained by the above features are that: the arc bend avoids the main beam and the vertical part of the crank arm to damage the main hanging steel wire rope, the movable joint of the crank arm and the main beam enables the conduction of the force of the bending part to be better, the steel wire rope is prevented from being obviously detached to cause larger local stress, and the uneven stress on the protection device occurs.
Drawings
FIG. 1 is an overall view of the prefabricated box girder lifting point hanger installation of the present invention;
FIG. 2 is a block diagram of the left and right lever of the present invention;
FIG. 3 is an end-to-end view of the present invention secured to a tank end;
FIG. 4 is a schematic diagram of the connection structure of the main hoisting steel wire rope and the overhead travelling crane hanging beam;
FIG. 5 is a first card slot shape modification schematic of the present invention;
FIG. 6 is a diagram of the connection of the floor protection device to the flange plate protection device of the present invention.
In the figure: 1. a main beam; 2R, right crank arm; 2L, left crank arm; 3. a pull ring; 4. a rope tightener; 5. a flexible strip; 501. a left rope portion; 502. an intermediate section; 503. a right rope portion; 6. Corner protection steel plates; 7. a bottom web; 8. a side web; 9. an upper wing plate; 10. A main hoisting steel wire rope; 11. overhead travelling crane hanging beam; 12. a main hanging pin shaft; 13. hoisting a steel wire by using a crown block; 14. pulley block; 15. a vertical support bolt; 16. a transverse support bolt; 17. a pressing plate; 18. a ratchet wrench; 19. a hook; 201. a side column; 202. a bending portion; 203. a first clamping groove; 2031. arc-shaped bending; 204. and a rubber pad.
Detailed Description
The invention is further described below in connection with the following examples which are provided for the purpose of better understanding of the present invention and are, therefore, not to be construed as limiting the scope of the invention.
Referring to fig. 1-6, the prefabricated box girder protecting sling provided by the invention comprises a flange plate protecting device arranged at a position of a selected lifting point of a prefabricated box girder, wherein the flange plate protecting device comprises a main beam 1, a left crank arm 2L is arranged at the left end of the main beam 1, a right crank arm 2R is arranged at the right end of the main beam 1, a bending part 202 is arranged at the lower ends of the left crank arm 2L and the right crank arm 2R, and the bending part 202 is arranged on an upper wing plate of the prefabricated box girder; the lower side of the upper wing plate 9 is clamped by the flange plate protection device by the fixing component, and the pull ring 3 is fixedly connected to the lower side of the bending part 202; the bottom plate protection device is further provided with a bottom plate protection device, the bottom plate protection device comprises a flexible strip-shaped piece 5 arranged at the bottom of a bottom web 7 of the prefabricated box girder, one end of the flexible strip-shaped piece 5 is connected with a pull ring 3 of a right crank arm 2R, the other end of the flexible strip-shaped piece is connected with a pull ring 3 of a left crank arm 2L, corners, corresponding to two sides of the bottom web 7, of the flexible strip-shaped piece 5 are provided with corner protection steel plates 6, and the flexible strip-shaped piece 5 is provided with a rope tightener 4; the crane is also provided with a main crane wire rope 10, the main crane wire rope 10 bypasses the bottom of the prefabricated box girder, two ends of the main crane wire rope 10 are connected with a crown block hanging girder 11, and the main crane wire rope 10 is sleeved with a flange plate protection device and a bottom plate protection device.
Alternatively, the flexible portion of the flexible strip member 5 is a steel wire rope, hereinafter referred to as a protection steel wire rope, which is divided into a left rope portion 501, a right rope portion 503 and a middle portion 502, two corner protection steel plates 6 are respectively connected to two ends of the middle portion 502, the left rope portion 501 is connected with the corner protection steel plate 6 on the left side of the precast box girder bottom web 7 and the pull ring 3 of the left crank arm 2L, the right rope portion 503 is connected with the corner protection steel plate 6 on the right side of the precast box girder bottom web 7 and the pull ring 3 of the right crank arm 2R, and the left rope portion 501 and the right rope portion 503 are both provided with a rope tightener 4. The three-section type protection steel wire rope and the two corner protection steel plates 6 are connected into a whole structure, the installation is convenient, and the two rope tighteners 4 enable the two ends of the protection steel wire rope to adjust the tension to balance the stress.
Preferably, the upper ends of the left rope portion 501 and the right rope portion 503 are provided with hooks 19, the hooks 19 are hooked on the pull ring 3, and the connection mode of the hooks 19 and the pull ring 3 is convenient for installation and disassembly.
Preferably, a rubber pad 204 is arranged on one side, close to the upper wing plate 9, of the left crank arm 2L and the right crank arm 2R, the rubber pad 204 plays a role in buffering, and if the crank arms are directly pressed to the side face of the upper wing plate 9, the rubber pad 204 can protect box girder concrete from being damaged.
Alternatively, a first clamping groove 203 which is vertically penetrated is arranged at the end part of the main beam 1 and the outer sides of the right crank arm 2R and the left crank arm 2L, and the upper part of the main hoisting steel wire rope 10 is arranged in the first clamping groove 203. Specifically, depending on the connection mode of the crank arm and the main beam 1, if the left crank arm 2L and the right crank arm 2R are arranged outside the main beam 1, the first clamping groove 203 is formed only outside the crank arm side column 201, if the left crank arm 2L and the right crank arm 2R are arranged at the lower side of the main beam 1, the end part of the main beam 1 is also connected with the crank arm to form a section of clamping groove structure, the main hoisting steel wire rope 10 is protected to be completely embedded in the first clamping groove 203, the upper end of the first clamping groove 203 is communicated with the ground, the lower end of the first clamping groove 203 is communicated with the first clamping groove, the main hoisting steel wire rope 10 can be stabilized, and the steel wire rope displacement caused by shaking in the hoisting process is avoided. Further, the outer surface of the corner protection steel plate 6 is provided with a second clamping groove, the bottom of the main hanging steel wire rope 10 is arranged in the second clamping groove, the second clamping groove is also used for restraining the position of the main hanging steel wire rope 10, the main hanging steel wire rope 10 is prevented from being tightened when being lifted, the main hanging steel wire rope 10 is prevented from being inclined or even displaced due to unbalance, and the main hanging steel wire rope 10 is prevented from being directly tied on the concrete of the box girder bottom web 7.
Alternatively, the fixing assembly comprises a transverse supporting bolt 16 and a vertical supporting bolt 15, wherein the outer end of the transverse supporting bolt 16 is in threaded connection with the bending part 202, the inner end of the transverse supporting bolt is provided with a pressing plate 17 through a ball shaft, and the pressing plate 17 is in abutting connection with the side web 8 of the prefabricated box girder; the lower end of the vertical supporting bolt 15 is in threaded connection with the bending part 202, and the upper end of the vertical supporting bolt is abutted against the bottom surface of the upper wing plate 9. The embodiment of the fixing assembly realizes the locking of the protection device to the box girder through the vertical supporting bolts 15, and the horizontal supporting bolts outwards support the crank arms so as to be mutually opposed with the main hoisting steel wire rope 10, so that the crank arms can effectively support the main hoisting steel wire rope 10.
When the crane hoist is used for hoisting prefabricated steel beams, the lower end of a hoist steel wire of a crane is generally provided with a pulley block 14, the lower end of a hoist steel wire 13 of the crane is connected with a crane hoist beam 11, the hoist steel wire 13 of the crane is connected with the midpoint of the crane hoist beam 11, and in the scheme, two sides of the crane hoist beam 11 are symmetrically provided with a plurality of hoist holes based on the midpoint; the main lifting steel wire rope 10 is vertically downwards through the main lifting steel wire rope 12, the stability of the steel wire rope is guaranteed, and the pressure generated by the steel wire rope at the side part of the box girder is reduced.
The main beam 1 of this scheme is scalable roof beam body, and main beam 1 length is adjustable, makes this protection hoist can be used for different case roof beams, and specifically, main beam 1 comprises left roof beam body, right roof beam body and core beam, equidistant a plurality of preformed holes of being provided with on core beam and the left roof beam body, the right roof beam body, runs through in the preformed hole that coincides mutually of left roof beam body, right roof beam body and core beam and installs the locking round pin axle, and this length adjustment structure is convenient for make.
The upper end and the lower end of the first clamping groove 203 are arc-shaped bends 2031 which are bent towards the direction far away from the main hoisting steel wire rope 10, the left crank arm 2L and the right crank arm 2R are connected with the main beam 1 through bolts, the bolt joints are movable joints, and the left crank arm 2L and the right crank arm 2R conduct pressure inwards according to the lateral pressure of the main hoisting steel wire rope on the outer sides of the left crank arm 2L and the right crank arm 2R; the box girder may shake during the hoisting process, specifically, the box girder body swings left and right relatively to the hanging girder, at this time, the upper end of the main hoisting steel wire rope 10 swings, the arc-shaped bend 2031 in this example provides a certain safety guarantee for the main hoisting steel wire rope 10 to swing, the main hoisting steel wire rope 10 is prevented from being directly pressed at a hard position at the upper end of the first clamping groove 203 when swinging inwards, trouble or damage is generated, the main hoisting steel wire rope 10 is similarly bent towards the bottom of the box girder after exiting the first clamping groove 203, if the lower end of the first clamping groove 203 has no arc-shaped bend 2031 excessively, the bending angle is relatively sharp, the steel wire rope is easily damaged, the main hoisting steel wire rope 10 cannot be deformed smoothly according to the structural shape, the pressure acting on the protection device is also uneven, and certain local stress is larger.
The specific construction example is combined, and the use process of the prefabricated box girder protection lifting appliance is specifically described:
Firstly, pouring, stretching and grouting of a box girder main body are completed; before the box girder is installed, the strength of the girder body concrete should reach the hoisting strength specified by the design, and when the design is not specified, the strength should not be lower than 80% of the design strength, so that the girder body can be hoisted or transported; after the box girder is ready, the overhead travelling crane is put into the box girder, the overhead travelling crane hoisting steel wire 13 is moved to the position right above the box girder hoisting point with the lower end overhead travelling crane hoisting beam 11, and the height of the overhead travelling crane hoisting beam 11 from the top surface of the prefabricated box girder can ensure the normal installation of the main hoisting steel wire rope 10; the pulley block 14 is opposite to the midpoint of the overhead crane hanging beam 11, so that the traction point can be centered to maintain balance.
Secondly, the lifting appliance is provided with a flange plate protection device firstly: placing the main cross beam 1 on the top surface of a prefabricated box girder body at the position of a lifting point on the top surface of the box girder, adjusting the distance between the left crank arm 2L and the right crank arm 2R and adapting the width of the upper wing plate 9 of the prefabricated box girder, ensuring that rubber pads 204 on the inner sides of side columns 201 of the right crank arm 2R and the left crank arm 2L can be closely attached to the side surfaces of the upper wing plate 9 of the box girder, designing a first clamping groove 203 on the side columns 201 of the left crank arm 2L and the right crank arm 2R, making the corners of the first clamping groove 203 and the crank arm into arc shapes so as to avoid damaging a main hoisting steel wire rope 10, and connecting the left crank arm 2L and the right crank arm 2R through a second pin shaft; the length of the transverse supporting bolt 16 is adjusted through the ratchet wrench 18, and the bending parts 202 of the left crank arm 2L and the right crank arm 2R can be propped against and tightly attached to the side web plate 8 of the prefabricated box girder; the ratchet wheel is arranged on the horizontal supporting bolt, the ratchet wheel is detachably connected with the ratchet wrench 18, the ratchet wrench 18 is used for rotating the horizontal supporting bolt so as to adjust the extending length of the horizontal supporting bolt, the vertical supporting bolt 15 can also be rotated by the ratchet wrench 18, the upper end of the vertical supporting bolt 15 is abutted to the bottom surface of the upper wing plate 9 after being heightened, and therefore the flange plate protection device is firmly fixed with the upper wing plate 9.
Thirdly, mounting a bottom plate protection device: the two ends of the protection steel wire rope are connected with the pull ring 3 at the bottom of the crank arm, and the hook 19 is directly buckled on the hanging ring; the three-section type protection steel wire rope connects the corner protection steel plates 6 together in series, the positions of the two corner protection steel plates 6 are adjusted, the two corner protection steel plates are closely attached to the corners of the precast beam bottom web 7, and the protection steel wire rope is tensioned through the rope tightener 4, so that the whole fixed bottom plate protection device is tightened.
Fourth, the main hoisting steel wire rope 10 is installed: the two ends of the main hoisting steel wire rope 10 are provided with steel wire rope sleeves, the main hoisting steel wire rope 10 bypasses the bottom of the precast box girder, the two ends of the main hoisting steel wire rope are hung on main hoisting pin shafts 12 at the two ends of the overhead travelling crane hanging girder 11, and the main hoisting steel wire rope 10 is used for covering the precast box girder body; the main hoisting steel wire rope 10 is clamped into the first clamping groove 203 and the second clamping groove, so that the main hoisting steel wire rope is kept at the position of a hoisting point, and is ensured not to deviate; the width between the main hanger pins 12 is preferably adjusted to be the same as the width of the precast box girder upper wing panel 9 so that the main hanger wire rope 10 is vertically pulled.
Finally, after the hoisting of the prefabricated box girder is completed, the main hoisting steel wire rope 10 and the protection device are dismantled, and the main hoisting steel wire rope 10, the bottom plate protection device and the flange plate protection device are dismantled in sequence according to the principle of 'first assembling and then disassembling'.
The foregoing description of the preferred embodiments of the invention is not intended to limit the scope of the claims, but rather to cover all equivalent modifications within the scope of the present invention as defined by the appended claims.
Claims (7)
1. The utility model provides a prefabricated box girder protection hoist, including setting up in the flange plate protection device of the selected hoisting point position of prefabricated box girder, flange plate protection device includes main beam (1), main beam (1) left end is provided with left turning arm (2L), the right-hand member is provided with right turning arm (2R), left turning arm (2L), right turning arm (2R) lower extreme is equipped with bending part (202), bending part (202) set up in prefabricated box girder upper wing board (9) downside, thereby bending part (202) are provided with fixed subassembly and make flange plate protection device card solid upper wing board (9), its characterized in that: a pull ring (3) is fixedly connected to the lower side of the bending part (202); the device is also provided with a bottom plate protection device, the bottom plate protection device comprises a flexible strip-shaped piece (5) arranged at the bottom of a bottom web (7) of the prefabricated box girder, one end of the flexible strip-shaped piece (5) is connected with a pull ring (3) of a right crank arm (2R), the other end of the flexible strip-shaped piece is connected with a pull ring (3) of a left crank arm (2L), corners of the flexible strip-shaped piece (5) corresponding to two sides of the bottom web (7) are provided with corner protection steel plates (6), and a rope tightener (4) is arranged on the flexible strip-shaped piece (5); the crane is also provided with a main hoisting steel wire rope (10), the main hoisting steel wire rope (10) bypasses the bottom of the prefabricated box girder, two ends of the main hoisting steel wire rope are connected with the overhead travelling crane hanging girder (11), and the main hoisting steel wire rope (10) is sleeved with a flange plate protection device and a bottom plate protection device.
2. The precast box girder protection sling as defined in claim 1, wherein: the flexible strip-shaped part (5) is a protection steel wire rope, the protection steel wire rope is divided into a left rope portion (501), a right rope portion (503) and a middle portion (502), two corner protection steel plates (6) are respectively connected to two ends of the middle portion (502), the left rope portion (501) is connected with a corner protection steel plate (6) on the left side of a precast box girder bottom web plate (7) and a pull ring (3) of a left crank arm (2L), the right rope portion (503) is connected with the corner protection steel plate (6) on the right side of the precast box girder bottom web plate (7) and the pull ring (3) of a right crank arm (2R), and the left rope portion (501) and the right rope portion (503) are both provided with a rope tightener (4).
3. The precast box girder protection sling as defined in claim 2, wherein: the upper ends of the left rope part (501) and the right rope part (503) are provided with hooks (19), and the hooks (19) are hooked on the pull ring (3).
4. The precast box girder protection sling as defined in claim 1, wherein: one side of the left crank arm (2L) and one side of the right crank arm (2R) close to the upper wing plate (9) are provided with rubber pads (204).
5. The precast box girder protection sling as defined in claim 4, wherein: the end part of the main beam (1) and the outer sides of the right crank arm (2R) and the left crank arm (2L) are provided with first clamping grooves (203) which are vertically communicated, and the upper part of the main hoisting steel wire rope (10) is arranged in the first clamping grooves (203).
6. The precast box girder protection sling as defined in claim 1, wherein: the fixing assembly comprises a transverse supporting bolt (16) and a vertical supporting bolt (15), the outer end of the transverse supporting bolt (16) is in threaded connection with the bending part (202), the inner end of the transverse supporting bolt is provided with a pressing plate (17) through a ball shaft, and the pressing plate (17) is in pressing connection with the side web plate (8) of the prefabricated box girder; the lower end of the vertical supporting bolt (15) is in threaded connection with the bending part (202), and the upper end of the vertical supporting bolt is abutted to the bottom surface of the upper wing plate (9).
7. The precast box girder protection sling as defined in claim 2, wherein: the middle point of the overhead travelling crane hanging beam (11) is connected with an overhead travelling crane hanging steel wire (13); a plurality of hanging holes are symmetrically arranged on two sides of the overhead travelling crane hanging beam (11) based on the middle point; the main hanging pin shafts (12) are arranged in the hanging holes, steel wire rope sleeves are arranged at two ends of the main hanging steel wire rope (10), the steel wire rope sleeves are hung on the main hanging pin shafts (12), two main hanging pin shafts (12) for installing the main hanging steel wire rope (10) are arranged in the two symmetrical hanging holes, and the distance between the two main hanging pin shafts (12) is equal to the width of the upper wing plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323015884.1U CN221216811U (en) | 2023-11-08 | 2023-11-08 | Prefabricated box girder protection hanger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202323015884.1U CN221216811U (en) | 2023-11-08 | 2023-11-08 | Prefabricated box girder protection hanger |
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| CN221216811U true CN221216811U (en) | 2024-06-25 |
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| CN202323015884.1U Active CN221216811U (en) | 2023-11-08 | 2023-11-08 | Prefabricated box girder protection hanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117284909A (en) * | 2023-11-08 | 2023-12-26 | 中国二十二冶集团有限公司 | Precast box beam protection spreader |
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2023
- 2023-11-08 CN CN202323015884.1U patent/CN221216811U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117284909A (en) * | 2023-11-08 | 2023-12-26 | 中国二十二冶集团有限公司 | Precast box beam protection spreader |
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