Precast concrete bridge deck slab lifting appliance, lifting point structure and lifting method thereof

Abstract

The invention belongs to the technical field of bridge engineering installation, and particularly relates to a prefabricated concrete bridge deck slab lifting tool. A plurality of lifting points are arranged on the top surface of a lifting frame, and each lifting point is connected with a lifting steel wire rope; the hanger assemblies are uniformly distributed on the bottom surface of the hanger; according to the lifting appliance assembly, a lifting appliance cross beam is fixedly connected with the bottom face of the lifting frame, and large connecting lug plates are arranged on the bottom faces of the two ends of the lifting appliance cross beam; the two pull rods correspond to the two large connecting lug plates in position respectively, and the upper ends of the pull rods are hinged to the large connecting lug plates. The two clamps respectively correspond to the two pull rods in position, and the upper ends of the clamps are hinged to the lower ends of the pull rods; the clamp connecting rod is positioned below the lifting appliance cross beam; the middle parts of the two clamps are respectively hinged with the two ends of the clamp connecting rod; and the upper hinge point of the pull rod is outside the lower hinge point. The lifting point structure is used for solving the technical problems that demolding is difficult due to the fact that an existing lifting point structure of the prefabricated concrete bridge deck needs an embedded part, and construction efficiency is low and potential safety hazards exist due to the fact that an existing lifting tool is inconvenient to mount and dismount.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering installation, and in particular relates to a precast concrete bridge deck hoist, a hoisting point structure and a hoisting method thereof. Background Art

[0002] With the continuous innovation and development of the bridge industry, steel-concrete composite beam bridges have a growing share in the field of bridge construction with their unique advantages. When installing traditional steel-concrete composite beam bridges, the hoisting of precast concrete bridge decks is usually carried out in the form of reserved hoisting points (usually holes) + bolted lifting ears on the bridge deck. The setting of the hoisting points requires pre-embedded steel pipes on the trolley before pouring the bridge deck, which greatly affects the arrangement and leveling process of the automated equipment. After the maintenance of the bridge deck is completed, the concrete debris in the steel pipe needs to be cleaned so that the screw can pass through the bridge deck and bolt to the lifting ears, which increases the difficulty of demoulding the bridge deck; when constructing on the bridge site, disassembling the hoisting points will also involve high-altitude operations, which is very inconvenient, inefficient and reduces the safety of hoisting construction. Therefore, there is an urgent need for a new type of hoisting point structure that does not require embedded parts, is easy to demould, and is easy to install and disassemble to serve the hoisting construction of precast concrete bridge decks, and is combined with special hoists to reduce the difficulty of the construction process, improve efficiency, and eliminate safety hazards. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a precast concrete bridge deck hoist, a hoisting point structure and a hoisting method thereof, which are used to solve the technical problems that the hoisting point structure of the existing precast concrete bridge deck requires embedded parts, resulting in difficulty in demoulding, and the existing hoist is inconvenient to install and disassemble, resulting in low construction efficiency and potential safety hazards. The technical solution of the present invention to solve the above technical problem is as follows: a precast concrete bridge deck hanger, comprising: A hanger, wherein a plurality of hanging points are arranged on the top surface of the hanger, and each of the hanging points is connected with a hanging wire rope; at least two spreader assemblies, the spreader assemblies being evenly distributed on the bottom surface of the hanger; The spreader assembly comprises: A sling crossbeam, the sling crossbeam is fixedly connected to the bottom surface of the hanger, and the bottom surfaces of both ends of the sling crossbeam are provided with large connecting ear plates; Two pull rods, the two pull rods correspond to the positions of the two large connecting ear plates respectively, and the upper ends of the pull rods are hinged to the large connecting ear plates; Two clamps, the two clamps correspond to the positions of the two pull rods respectively, and the upper ends of the clamps are hinged to the lower ends of the pull rods; A clamp connecting rod, the clamp connecting rod is located below the sling crossbeam, and the middle parts of the two clamps are respectively hinged to the two ends of the clamp connecting rod; The upper hinge point of the pull rod is outside the lower hinge point.

[0004] The present invention utilizes a hanger to drive a plurality of hanger assemblies to hoist the precast concrete bridge deck, so that the hoisting of the precast concrete bridge deck is more stable.

[0005] Further: the hanger is a frame-type structure, including a pair of cross beams and a pair of longitudinal beams; The hanging points are arranged at the four corners of the top surface of the hanger, and the hanging points include hanging ear plates, which are connected to the hanger through upper connecting plates, and a plurality of upper reinforcing plates are arranged on both side surfaces and both end surfaces of the hanging ear plates, and a plurality of equidistant connecting holes are opened on the hanging ear plates; At least two lower connecting plates are provided at the four corners of the bottom surface of the hanger, the top surface of the lower connecting plate is connected to the hanger, and a plurality of lower reinforcing plates are provided between the lower connecting plate and the hanger, and a plurality of mounting holes are also opened on the lower connecting plate.

[0006] The beneficial effects of adopting this step are as follows: the connection hole is used to connect with the lifting wire rope, and the connection position of the lifting wire rope is adjustable to adapt to different lifting heights; different lower connecting plate positions can correspond to precast concrete bridge panels of different lengths.

[0007] Further: the sling crossbeam is provided with a mounting plate corresponding to the position of the lower connecting plate; The bottom surface of the sling crossbeam is provided with at least two vertical support rods.

[0008] The beneficial effects of adopting this step are: a detachable connection is achieved through the mounting plate and the lower connecting plate; the vertical support rod is used to ensure that a certain distance is maintained between the sling beam and the clamp connecting rod in an idle state, so that the clamp is in a stress-free state.

[0009] Furthermore: at least two small connecting ear plates are also provided on the bottom surface of the sling crossbeam, and the two small connecting ear plates are respectively located between the large connecting ear plate and the vertical support rod; each of the small connecting ear plates is hinged with a temporary pull rod; The top surface of the clamp connecting rod is provided with a hook at a position corresponding to the small connecting ear plate; The bottom end of the temporary pull rod is provided with a buckle matched with the hook.

[0010] The beneficial effect of adopting this step is: by connecting the hook with the temporary pull rod, the sling beam temporarily suspends the clamp connecting rod, shortening the distance between the sling beam and the clamp connecting rod, so that the clamp remains in an open state.

[0011] Furthermore: the top end of the hook is a tip with an arc transition.

[0012] The beneficial effect of adopting this step is that the tip of the hook with the arc transition has a guiding function, guiding the buckle of the temporary pull rod to hook with the hook.

[0013] Furthermore: a lock buckle is provided at the lower end of the clamp, the lock buckle is welded or hinged to the lower end of the clamp, and the lock buckle is round steel or square steel.

[0014] The beneficial effect of adopting this step: the lifting point structure on both sides of the precast concrete bridge deck is embedded with locks for lifting.

[0015] Furthermore: both ends of the clamp connecting rod are provided with a plurality of equidistant hinge points.

[0016] The beneficial effect of adopting this step is that the positions of the clamps and the clamp connecting rods are adjusted through different hinge points to achieve relative position adjustment between the clamps to adapt to precast concrete bridge decks of different widths.

[0017] Furthermore: it also includes an anti-slip block, which is L-shaped and has a plurality of through holes and limiting holes, the through holes are adapted to the steel bars of the precast concrete bridge deck; the limiting holes are adapted to the lock buckle of the clamp.

[0018] The beneficial effects of adopting this step are as follows: the anti-detachment block is used to strengthen the connection stability between the clamp and the precast concrete bridge deck, thereby preventing the precast concrete bridge deck from detaching from between the clamps and improving the safety of lifting.

[0019] The present invention also provides a precast concrete bridge deck suspension point structure, comprising: the suspension point structures are arranged on both long sides of the precast concrete bridge deck, and the suspension point structures on each side are not less than 2, and the suspension point structures on each side are respectively located at 1 / 4 of the distance from the end of the precast concrete bridge deck; The suspension point structure is a slot, and the shape of the slot is adapted to the clamp as claimed in claim 1 or 6; The length of the slot is 400±50 mm, and the depth of the slot is 2 / 5 to 1 / 2 of the diameter or width of the clamp.

[0020] The present invention also provides a method for hoisting a precast concrete bridge deck hoist, comprising the following steps: S1: When the spreader is idle, the vertical support rod presses against the clamp connecting rod, and the clamp is not subjected to force; S2: Before the lifting construction, the position of the installation buckle of the lifting lug plate on the hanger is selected according to the lifting height and the length of the wire rope, the installation position of the lifting device crossbeam on the hanger is selected according to the length of the precast concrete bridge deck, and the position of the hinge point on the clamp connecting rod is selected according to the width of the precast concrete bridge deck, so as to meet the lifting construction of the precast concrete bridge decks of different lifting heights and different sizes; S3: Before the precast concrete bridge deck is clamped, a temporary pull rod is connected to the hook to prevent the clamp from clamping inward due to force after the hoist is lifted, so that the clamp cannot be placed in the lifting point structure of the precast concrete bridge deck; S4: When the hoist is directly above the precast concrete bridge deck, the hoist is slowly lowered until the clamp connecting rod contacts the precast concrete bridge deck, and then the hoist crossbeam is close to the clamp connecting rod, and after the temporary pull rod and the hook are released, the hoist is slowly raised to drive the clamp to close, so that the clamp can be smoothly inserted into the lifting point structure of the precast concrete bridge deck; S5: After the clamp contacts the lifting point structure of the precast concrete bridge deck, an anti-slip block is installed at each lifting point structure, the anti-slip block clamps the clamp and connects it to the embedded steel bars on the precast concrete bridge deck, so as to prevent the clamp from slipping out of the lifting point structure during the lifting process, causing safety hazards; S6: After the hoisting device, the anti-slip block and the precast concrete bridge deck are installed, the hoisting construction is carried out until the hoisting construction is completed, the temporary pull rod is connected to the hook again, and the connection between the hoisting device, the anti-slip device and the precast concrete bridge deck is removed to complete the hoisting.

[0021] The beneficial effects of the present invention are: 1. The hoisting device of the present invention is used to fix the precast concrete bridge deck in a clamping manner to achieve lifting, which is simple and convenient, and has no effect on the operation of the automation equipment in the factory; 2. The present invention uses a lifting point structure combined with a lifting device to make the installation and disassembly of precast concrete bridge panels fast and efficient, and is more suitable for in-plant and on-site lifting construction of precast concrete bridge panels; 3. The present invention improves the stability and safety during the lifting process of the precast concrete bridge deck through the hanger in the hanger; 4. The present invention has strong versatility and is suitable for the hoisting construction of precast concrete bridge decks of different lifting heights and different sizes; 5. The connection mode of the hanger, hanger beam, pull rod, clamp and clamp connecting rod and other parts in the present invention is hinged (pin connection) or bolted connection, which can be disassembled and assembled for easy transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A stereoscopic diagram of the application of a precast concrete bridge deck hanger provided by the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A part; Figure 3 A three-dimensional diagram of a precast concrete bridge deck hanger provided by the present invention; Figure 4 A schematic diagram of the application structure of a precast concrete bridge deck hanger provided by the present invention; Figure 5 for Figure 4 A partial enlarged view of part B in the middle; Figure 6 A three-dimensional diagram of a precast concrete bridge deck hanging point provided by the present invention; Figure 7 for Figure 6 A partial enlarged view of the middle C part; Figure 8 A three-dimensional diagram of a clamp in a precast concrete bridge deck hanger provided by the present invention; Fig. 9 A three-dimensional diagram of an anti-slip block in a precast concrete bridge deck hanger provided by the present invention.

[0024] Reference numerals: 1-hanger; 2-lifting wire rope; 3-lifting crossbeam; 4-pull rod; 5-clamp; 6-clamp connecting rod; 7-anti-slip block; 8-precast concrete bridge deck; 11-lifting ear plate; 31-large connecting ear plate; 32-small connecting ear plate; 33-vertical support rod; 34-temporary pull rod; 51-locking buckle; 61-bend hook; 71-limiting hole; 81-card slot. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] Example like Figure 1 to Figure 9 As shown, the present invention provides a precast concrete bridge deck hanger, comprising: A hanger 1, wherein the top surface of the hanger 1 is provided with a plurality of hanging points, each of which is connected with a hoisting wire rope 2. The specific location of the hanging point can be selected according to the hoisting height. When the hoisting height is high, the hanging point is expanded outward, and vice versa; At least two spreader assemblies, the spreader assemblies are evenly distributed on the bottom surface of the hanger 1; The spreader assembly comprises: A sling crossbeam 3, wherein the sling crossbeam 3 is fixedly connected to the bottom surface of the hanger 1, and large connecting ear plates 31 are provided on the bottom surfaces of both ends of the sling crossbeam 3; Two pull rods 4, the two pull rods 4 correspond to the positions of the two large connecting ear plates 31 respectively, and the upper ends of the pull rods 4 are hinged to the large connecting ear plates 31; Two clamps 5, the two clamps 5 correspond to the positions of the two pull rods 4 respectively, and the upper ends of the clamps 5 are hinged to the lower ends of the pull rods 4; A clamp link 6, the clamp link 6 is located below the hanger cross beam 3, and the middle parts of the two clamps 5 are hinged to the two ends of the clamp link 6 respectively; The upper hinge point of the pull rod 4 is outside the lower hinge point, and the clamp connecting rod 6 ensures that the clamps 5 at both ends rotate inward synchronously after being pulled upward by the pull rod 4.

[0031] The present invention utilizes the hanger 1 to drive a plurality of hanger assemblies to hoist the precast concrete bridge deck 8, so that the hoisting of the precast concrete bridge deck 8 is more stable.

[0032] On the basis of the above technical solution, the hanger 1 is a frame-type structure, including a pair of cross beams and a pair of longitudinal beams. The hanger 1 of the frame-type structure can remain stable under the hoisting of multiple hoisting wire ropes 2 of the same length; The hanging points are arranged at the four corners of the top surface of the hanger 1, and the hanging points include a hanging ear plate 11, and the hanging ear plate 11 is connected to the hanger 1 through an upper connecting plate, and a plurality of upper reinforcing plates are arranged on both side surfaces and both end surfaces of the hanging ear plate 11, and a plurality of equidistant connecting holes are opened on the hanging ear plate 11; At least two lower connecting plates are provided at the four corners of the bottom surface of the hanger 1, the top surface of the lower connecting plate is connected to the hanger 1, and a plurality of lower reinforcing plates are provided between the lower connecting plate and the hanger 1, and a plurality of mounting holes are also provided on the lower connecting plate. The above parts are all connected by welding.

[0033] The connection hole is used to connect with the lifting wire rope 2. The connection position of the lifting wire rope 2 is adjustable to adapt to different lifting heights; different lower connecting plate positions can correspond to precast concrete bridge panels 8 of different lengths.

[0034] On the basis of the above technical solution, a mounting plate corresponding to the position of the lower connecting plate is provided on the sling crossbeam 3; At least two vertical support rods 33 are provided on the bottom surface of the sling cross beam 3 .

[0035] The detachable connection is achieved through the mounting plate and the lower connecting plate, generally bolted; the vertical support rod 33 is used to ensure that a certain distance is maintained between the sling beam 3 and the clamp connecting rod 6 in an idle state, so that the clamp 5 is in a stress-free state.

[0036] On the basis of the above technical solution, at least two small connecting ear plates 32 are further provided on the bottom surface of the sling cross beam 3, and the two small connecting ear plates 32 are respectively located between the large connecting ear plate 31 and the vertical support rod 33; each of the small connecting ear plates 32 is hinged with a temporary pull rod 34; The top surface of the clamp connecting rod 6 is provided with a hook 61 at a position corresponding to the small connecting ear plate 32; The bottom end of the temporary pull rod 34 is provided with a buckle adapted to the curved hook 61. In the present embodiment, the temporary pull rod 34 is composed of two identical steel plates arranged in parallel, and an upper pin and a lower pin are provided between the two steel plates. The upper pin is used for hinge connection, and the lower pin is used for hooking with the curved hook 61.

[0037] By hooking the hook 61 with the temporary pull rod 34, the hanger beam 3 temporarily hangs the clamp link 6, shortening the distance between the hanger beam 3 and the clamp link 6, and keeping the clamp 5 in an open state, the precast concrete bridge deck can be easily placed between the two clamps 5.

[0038] On the basis of the above technical solution, the top end of the hook 61 is a tip with an arc transition.

[0039] The tip of the hook 61 with the arc transition has a guiding function, guiding the buckle of the temporary pull rod 34 to be hooked with the hook 61 .

[0040] On the basis of the above technical solution, a lock buckle 51 is provided at the lower end of the clamp 5 , and the lock buckle 51 is welded or hinged to the lower end of the clamp 5 , and the lock buckle 51 is round steel or square steel.

[0041] The locking buckles 51 are embedded in the lifting point structures on both sides of the precast concrete bridge deck 8 for lifting.

[0042] On the basis of the above technical solution, both ends of the clamp link 6 are provided with a plurality of equidistant hinge points.

[0043] The positions of the clamp 5 and the clamp link 6 are adjusted through different hinge points to achieve relative position adjustment between the clamps 5 to adapt to precast concrete bridge decks 8 of different widths.

[0044] On the basis of the above technical solution, it also includes an anti-slip block 7, which is L-shaped and has a plurality of through holes and limiting holes 71. The through holes are adapted to the steel bars of the precast concrete bridge deck 8. After the anti-slip block 7 is inserted into the steel bars, the exposed steel bars are screwed together with the nuts to fix the anti-slip block 7; the limiting holes 71 are adapted to the lock buckle 51 of the clamp 5.

[0045] The anti-slip block 7 is used to strengthen the connection stability between the clamp 5 and the precast concrete bridge deck 8, thereby preventing the precast concrete bridge deck 8 from being detached from the clamp 5 and improving the safety of hoisting.

[0046] The present invention also provides a suspension point structure of a precast concrete bridge deck 8, comprising: the suspension point structure is arranged on both long sides of the precast concrete bridge deck 8, and the suspension point structure on each side is not less than 2, and through the force analysis of the precast concrete bridge deck, it is obtained that the suspension point structure on each side is respectively located at 1 / 4 of the distance from the end of the precast concrete bridge deck 8, where the force effect is best and the balance is best; The hanging point structure is a slot 81, and the shape of the slot 81 is adapted to the clamp 5 as claimed in claim 1 or 6; The length of the slot 81 is 400±50 mm, and the depth of the slot 81 is 2 / 5 to 1 / 2 of the diameter or width of the clamp 5. If the slot 81 is too small, it will lead to insufficient force, and if it is too large, the concrete will not be able to fill the slot when pouring the wet joint of the bridge deck.

[0047] The present invention also provides a method for hoisting a precast concrete bridge deck 8 hoist. The construction principle is that the clamp 5 is in hard contact with the precast concrete bridge deck 8. When the crane is lifted upward, the clamp 5 is tightened inward due to the vertical load. The value increases with the increase of the vertical load to achieve rapid hoisting of the precast concrete bridge deck 8 and rapid disassembly of the hoist. The method specifically includes the following steps: S1: When the sling is idle, the vertical support rod 33 presses against the clamp link 6, and the clamp 5 is not subjected to force; S2: Before the lifting construction, the position of the installation buckle of the lifting lug plate 11 on the hanger 1 is selected according to the lifting height and the length of the wire rope, the installation position of the lifting device crossbeam 3 on the hanger 1 is selected according to the length of the precast concrete bridge deck 8, and the position of the hinge point on the clamp connecting rod 6 is selected according to the width of the precast concrete bridge deck 8, so as to meet the lifting construction of the precast concrete bridge deck 8 of different lifting heights and different sizes; S3: Before the precast concrete bridge deck 8 is clamped, the temporary tie rod 34 is connected to the hook 61 to prevent the clamp 5 from being clamped inward due to force after the hoist is lifted, and the clamp 5 cannot be placed in the lifting point structure of the precast concrete bridge deck 8; S4: When the hoist is directly above the precast concrete bridge deck 8, the hoist is slowly lowered until the clamp link 6 contacts the precast concrete bridge deck 8, and then the hoist crossbeam 3 and the clamp link 6 are close to each other, and after the temporary tie rod 34 and the hook 61 are released, the hoist is slowly raised to drive the clamp 5 to close, so that the clamp 5 can be smoothly inserted into the suspension point structure of the precast concrete bridge deck 8; S5: After the clamp 5 contacts the lifting point structure of the precast concrete bridge deck 8, an anti-slip block 7 is installed at each lifting point structure, and the anti-slip block 7 clamps the clamp 5 and connects it with the embedded steel bars on the precast concrete bridge deck 8, so as to prevent the clamp 5 from slipping out of the lifting point structure during the lifting process, causing safety hazards; S6: After the hoisting device, the anti-slip block 7 and the precast concrete bridge deck 8 are installed, the hoisting construction is carried out until the hoisting construction is completed, the temporary pull rod 34 is connected to the hook 61 again, and the connection between the hoisting device, the anti-slip device and the precast concrete bridge deck 8 is removed to complete the hoisting.

[0048] Compared with the prior art, the hoisting device, hoisting point structure and hoisting method of the present application eliminate the need for embedded parts for precast concrete bridge decks and facilitate demoulding. During the hoisting process, the installation and disassembly of the hoisting device are simple and convenient, which can improve the efficiency of bridge construction and improve safety.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precast concrete bridge deck hanger, characterized in that: include: A hanger, wherein a plurality of hanging points are arranged on the top surface of the hanger, and each of the hanging points is connected with a hanging wire rope; at least two spreader assemblies, the spreader assemblies being evenly distributed on the bottom surface of the hanger; The spreader assembly comprises: A sling crossbeam, the sling crossbeam is fixedly connected to the bottom surface of the hanger, and the bottom surfaces of both ends of the sling crossbeam are provided with large connecting ear plates; Two pull rods, the two pull rods correspond to the positions of the two large connecting ear plates respectively, and the upper ends of the pull rods are hinged to the large connecting ear plates; Two clamps, the two clamps correspond to the positions of the two pull rods respectively, and the upper ends of the clamps are hinged to the lower ends of the pull rods; A clamp connecting rod, the clamp connecting rod is located below the sling crossbeam, and the middle parts of the two clamps are respectively hinged to the two ends of the clamp connecting rod; The upper hinge point of the pull rod is outside the lower hinge point.

2. The precast concrete bridge deck hanger according to claim 1, characterized in that: The hanger is a frame-type structure, including a pair of cross beams and a pair of longitudinal beams; The hanging points are arranged at the four corners of the top surface of the hanger, and the hanging points include hanging ear plates, which are connected to the hanger through upper connecting plates, and a plurality of upper reinforcing plates are arranged on both side surfaces and both end surfaces of the hanging ear plates, and a plurality of equidistant connecting holes are opened on the hanging ear plates; At least two lower connecting plates are provided at the four corners of the bottom surface of the hanger, the top surface of the lower connecting plate is connected to the hanger, and a plurality of lower reinforcing plates are provided between the lower connecting plate and the hanger, and a plurality of mounting holes are also opened on the lower connecting plate.

3. The precast concrete bridge deck hanger according to claim 2, characterized in that: The sling crossbeam is provided with a mounting plate corresponding to the position of the lower connecting plate; The bottom surface of the sling crossbeam is provided with at least two vertical support rods.

4. The precast concrete bridge deck hanger according to claim 3, characterized in that: The bottom surface of the sling crossbeam is also provided with at least two small connecting ear plates, and the two small connecting ear plates are respectively located between the large connecting ear plate and the vertical support rod; each of the small connecting ear plates is hinged with a temporary pull rod; The top surface of the clamp connecting rod is provided with a hook at a position corresponding to the small connecting ear plate; The bottom end of the temporary pull rod is provided with a buckle matched with the hook.

5. The precast concrete bridge deck hanger according to claim 4, characterized in that: The top end of the hook is a pointed end with an arc transition.

6. The precast concrete bridge deck hanger according to claim 5, characterized in that: The lower end of the clamp is provided with a lock buckle, which is welded or hinged to the lower end of the clamp, and the lock buckle is round steel or square steel.

7. The precast concrete bridge deck hanger according to claim 6, characterized in that: Both ends of the clamp connecting rod are provided with a plurality of equally spaced hinge points.

8. The precast concrete bridge deck hanger according to claim 7, characterized in that: It also includes an anti-slip block, which is L-shaped and has a plurality of through holes and limiting holes. The through holes are adapted to the steel bars of the precast concrete bridge deck; the limiting holes are adapted to the lock buckle of the clamp.

9. A precast concrete bridge deck hanging point structure, characterized in that: include: The suspension point structures are arranged on both long sides of the precast concrete bridge deck, and there are no less than 2 suspension point structures on each side, and the suspension point structures on each side are respectively located at 1 / 4 of the distance from the end of the precast concrete bridge deck; The suspension point structure is a slot, and the shape of the slot is adapted to the clamp as claimed in claim 1 or 6; The length of the slot is 400±50 mm, and the depth of the slot is 2 / 5 to 1 / 2 of the diameter or width of the clamp.

10. A method for hoisting a precast concrete bridge deck hoist, characterized in that: The following steps are involved: S1: When the spreader is idle, the vertical support rod presses against the clamp connecting rod, and the clamp is not subjected to force; S2: Before the lifting construction, the position of the installation buckle of the lifting lug plate on the hanger is selected according to the lifting height and the length of the wire rope, the installation position of the lifting device crossbeam on the hanger is selected according to the length of the precast concrete bridge deck, and the position of the hinge point on the clamp connecting rod is selected according to the width of the precast concrete bridge deck, so as to meet the lifting construction of the precast concrete bridge decks of different lifting heights and different sizes; S3: Before the precast concrete bridge deck is clamped, a temporary pull rod is connected to the hook to prevent the clamp from clamping inward due to force after the hoist is lifted, so that the clamp cannot be placed in the lifting point structure of the precast concrete bridge deck; S4: When the hoist is directly above the precast concrete bridge deck, the hoist is slowly lowered until the clamp connecting rod contacts the precast concrete bridge deck, and then the hoist crossbeam is close to the clamp connecting rod, and after the temporary pull rod and the hook are released, the hoist is slowly raised to drive the clamp to close, so that the clamp can be smoothly inserted into the lifting point structure of the precast concrete bridge deck; S5: After the clamp contacts the lifting point structure of the precast concrete bridge deck, an anti-slip block is installed at each lifting point structure, the anti-slip block clamps the clamp and connects it to the embedded steel bars on the precast concrete bridge deck, so as to prevent the clamp from slipping out of the lifting point structure during the lifting process, causing safety hazards; S6: After the hoisting device, the anti-slip block and the precast concrete bridge deck are installed, the hoisting construction is carried out until the hoisting construction is completed, the temporary pull rod is connected to the hook again, and the connection between the hoisting device, the anti-slip device and the precast concrete bridge deck is removed to complete the hoisting.

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