A bridge erecting machine protective hoisting integrated device

Abstract

This invention provides an integrated protective hoisting device for a bridge erecting machine, comprising winches located at the left and right ends of the lower part of the second outrigger, a steel wire rope wound around the winches, a first single-wheel pulley located on the second outrigger, rope fixing frames respectively installed on both sides of the lower part of the third outrigger, and a protective rope connected to the rope fixing frames. The integrated protective hoisting device has two working states: a protective state and a hoisting state. This invention provides an integrated protective hoisting structure for a bridge erecting machine, using the protective rope as a guardrail. During installation, workers only need to provide traction, and the winches tighten the protective rope to form a temporary guardrail. This can replace the need for moving and installing temporary guardrails, providing edge protection for the bridge deck between the second and third outriggers of the bridge erecting machine, ensuring the safety of personnel on it. Simultaneously, the combination of the steel wire rope, winches, and the first single-wheel pulley can also be used to hoist objects on the bridge, realizing the dual function of this device.

Description

Technical Field

[0001] This invention belongs to the field of bridge erecting machine technology, specifically relating to an integrated protective hoisting device for bridge erecting machines. Background Technology

[0002] During bridge erection machine operations, personnel need to work on the bridge deck around the machine. However, due to the position of the machine or beam transport vehicle, personnel often have to walk on both sides of the bridge deck around the machine, posing a risk of falls from height. Therefore, safety railings are needed to ensure personnel safety. Temporary railings are generally made of welded steel pipes or square tubing. Typically, after the bridge erection machine installs the beam onto the pier, workers move and install the temporary railings on the bridge deck as the machine moves forward through the span. As the beam erection progresses and the machine moves forward, workers need to remove and install the temporary railings each time. The main problems are: first, immediately after the precast beam is erected and before the temporary railings are installed, there is no protection on the bridge deck, and construction workers still face safety risks; second, manually moving the temporary railings is labor-intensive and inefficient. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated protective hoisting device for bridge erecting machines, which can replace temporary guardrails, provide edge protection for bridge workers, eliminate the need for manual relocation, and the winch on one side can also hoist objects onto the bridge surface via the first single pulley.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A bridge erecting machine protective hoisting integrated device includes winches installed at the left and right ends of the lower part of the second outrigger, a steel wire rope wound on the winch drum, a first single pulley installed on the second outrigger and positioned higher than the winch, rope fixing frames installed on both sides of the lower part of the third outrigger, and a protective rope connected to the rope fixing frames.

[0006] The bridge erecting machine's integrated protective and hoisting device has two working states: a protective state and a hoisting state.

[0007] Protective configuration: The end of the protective rope away from the rope fixing frame is connected to the end of the wire rope. The winch pulls the protective rope taut through the wire rope to erect it on the left and right sides of the bridge erecting machine, forming a guardrail structure.

[0008] Lifting status: The wire rope is wound around the first single-vehicle pulley and a hook is installed at the end of the wire rope. The object between the bridge deck and the area under the bridge is lifted by controlling the winch.

[0009] Furthermore, rope frames are provided on the left and right ends of the second support leg facing the third support leg;

[0010] When in protective condition, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is connected to the end of the wire rope after passing through the rope fixing frame, forming a double-line guardrail structure.

[0011] When in the hoisting state, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is fixed to the rope fixing frame through a temporary rope fixing structure to form a single-line guardrail structure; the wire rope is detached from the protective rope, and the wire rope passes through the first single-wheel pulley fixed to the second outrigger to hoist heavy objects under the bridge.

[0012] Furthermore, rope frames are provided on both ends of the second support leg facing the third support leg, and temporary fixing hooks are provided on the rope frames or on the second support leg near the rope frames.

[0013] When in protective condition, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is connected to the end of the wire rope after passing through the rope fixing frame, forming a double-line guardrail structure.

[0014] When in the hoisting state, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is connected to the temporary hook after passing through the rope fixing frame, forming a double-line guardrail structure.

[0015] Furthermore, the rope fixing frame extends outward from the third outrigger to a position corresponding to the winch, so that the protective rope guardrail structure is arranged in the front-to-back direction.

[0016] Furthermore, the rope fixing frame includes a fixing frame fixed on the left and right sides of the third outrigger and two guide wheels disposed on the fixing frame, with the two guide wheels spaced apart in the vertical direction.

[0017] Furthermore, the winch located at the left end of the second outrigger is designated as the first winch, which is in a protected state only; the first winch is located on the side of the second outrigger facing the third outrigger.

[0018] Furthermore, the winch located at the right end of the second outrigger is designated as the second winch. The second winch is installed on the bottom surface of the main boom of the second outrigger, and the cable exit direction of the second winch is to the right. The first single-car pulley is located above and to the right of the second winch. The first single-car pulley is located on the outside of the bridge deck to facilitate the hoisting of items under the bridge.

[0019] Furthermore, a traction ring is provided on the bottom surface of the main boom of the second outrigger, located on the right side of the second winch; when in the protective state, the wire rope of the second winch is wound around a second single-wheel pulley, which is hooked onto the traction ring, so that the wire rope of the second winch turns 90° and connects to the protective rope; when in the hoisting state, the second single-wheel pulley is disengaged from the traction ring.

[0020] Furthermore, a fixed pulley is provided at the rightmost end of the bottom surface of the main boom of the second outrigger; when in the hoisting state, the wire rope of the second winch passes under the fixed pulley, winds around to the top of the first single-wheel trolley, and then extends downward to realize the hoisting of objects from the bottom of the bridge.

[0021] Furthermore, a hook is provided at the end of the wire rope, and a baffle is provided between the hook and the wire rope. A limit frame is provided at the position of the winch, and the wire rope passes through the limit frame. The height of the limit frame is less than the diameter of the baffle, and the length of the limit frame is greater than the diameter of the baffle. Thus, the baffle in a vertical state cannot pass through the limit frame, while the baffle in a horizontal state can pass through the limit frame.

[0022] The working principle of this invention is as follows: This invention is applicable to bridge erecting machines with O-shaped legs for the second and third outriggers. A temporary guardrail is erected between the second and third outriggers of this type of bridge erecting machine using a protective rope. One end of the temporary guardrail is positioned by a rope fixing frame, and the other end is equipped with a winch. The winch pulls the protective rope with a wire rope, tightening it to form the guardrail structure. When the distance between the second and third outriggers changes with the movement of the bridge erecting machine, part of the wire rope is released by the winch to slack the protective rope. Simultaneously, after the protective rope is detached from the winch's wire rope, the end of the wire rope can be guided downwards by a first crane pulley, thereby enabling the hoisting of objects between the bridge deck and the area beneath the bridge.

[0023] The beneficial effects of this invention are:

[0024] This invention provides an integrated protective hoisting structure for bridge erecting machines, using protective ropes as guardrails. During installation, workers only need to provide traction, and a winch tightens the protective ropes via steel wire ropes to form temporary guardrails. This can replace temporary guardrails that are moved and installed by workers after the precast beams are erected on the piers, providing edge protection on the bridge deck between the second and third outriggers to ensure the safety of personnel. Furthermore, the protective ropes are located on both sides of the bridge erecting machine. During normal operation, unlike existing temporary guardrails made of welded steel pipes or square tubes, they do not need to be carried by workers to each newly erected bridge deck for installation. They can move directly with the bridge erecting machine, eliminating the need for installation and dismantling on each bridge deck, thus saving a significant amount of labor.

[0025] The present invention can also be configured into a multi-layer guardrail structure as needed;

[0026] In addition, while realizing the function of guardrail, the combination of wire rope, winch and first single pulley can also be used to lift objects on bridges, realizing the dual function of this device. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0028] Figure 1 This is a schematic diagram of the protection status according to an embodiment of the present invention.

[0029] Figure 2 This is a bottom view of the second support leg in an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the installation of the first winch according to an embodiment of the present invention.

[0031] Figure 4 for Figure 1 A partial schematic diagram of the direction A in the middle.

[0032] Figure 5 for Figure 1 A partial schematic diagram along the B direction.

[0033] Figure 6 This is a schematic diagram of the second winch in the hoisting state according to an embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the installation of the rope fixing frame according to an embodiment of the present invention.

[0035] Figure 8 This is a diagram showing the actual state of the first single-wheel pulley when the present invention is in a protected state.

[0036] In the diagram, 1-Outrigger No. 1, 2-Outrigger No. 2, 3-Outrigger No. 3, 4-Main beam, 5-First winch, 6-First wire rope, 7-First hook, 8-First protective rope, 9-First rope frame, 10-Second winch, 11-Second wire rope, 12-Second hook, 13-Second protective rope, 14-Second rope frame, 15-First base, 16-Second base, 17-Rope fixing frame, 18-Second single-wheel pulley, 19-First single-wheel pulley, 20-Fixed pulley, 21-Limit frame, 22-Temporary hook, 23-Inherent frame, 24-Baffle plate, 25-Traction ring, 26-Rope fixing component. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0038] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0040] like Figures 1 to 8 As shown, a bridge erecting machine protective hoisting integrated device includes a winch installed at the lower left and right ends of the second leg 2, a wire rope wound on the winch drum, a first single pulley installed on the second leg 2 and positioned higher than the winch, rope fixing frames 17 installed on the lower sides of the third leg 3 respectively, and a protective rope connected to the rope fixing frames 17.

[0041] The bridge erecting machine's integrated protective and hoisting device has two working states: a protective state and a hoisting state. The hoisting state can exist simultaneously with the protective state.

[0042] Protective state: The end of the protective rope away from the rope fixing frame 17 is connected to the end of the wire rope. The winch pulls the protective rope taut through the wire rope so that it is erected on the left and right sides of the bridge erecting machine to form a guardrail structure.

[0043] Lifting status: The wire rope is wound around the first single-car pulley and a hook is set at the end of the wire rope. The object between the bridge deck and the bridge bottom is lifted by controlling the winch. This function is achieved by one of the winches installed under the outrigger through a pulley block composed of the first single-car pulley and a fixed pulley.

[0044] This invention applies to bridge erecting machines with O-shaped legs (2 and 3), such as the CRRC JQ900A bridge erecting machine, which includes a main beam 4 and legs 1, 2, and 3 respectively arranged along the front-rear direction on the main beam 4. One operating mode of this type of bridge erecting machine is as follows: after the precast beam is transported by the rear beam transport trolley, it is lifted forward by the crane trolley and passes through the O-shaped legs. Leg 3 and second leg 2 are placed on the two piers between first leg 1 and second leg 2. Then the main beam 4 moves forward, first leg 1 crosses over to the next pier, and second leg 2 and third leg 3 finally stand on the precast beam that has just been erected. This device then comes into play, with the winch pulling the protective rope to form a guardrail structure on both sides of the newly placed bridge deck. On the previous bridge deck, because the bridge deck is very wide, personnel do not need to work and usually walk in the middle of the bridge, so the safety risk is very low.

[0045] During bridge construction, the distance between outriggers 2 and 3 remains constant most of the time. However, sometimes, such as when the bridge erecting machine is passing through a span, the outriggers need to be temporarily retracted. The outrigger cylinders move the outriggers upwards, requiring the safety rope to be loosened. Specifically, a portion of the wire rope is released by a winch to loosen the guardrail structure. If the distance between outriggers 2 and 3 increases beyond the length of the safety rope, the wire rope output by the winch can be used to supplement the insufficient length of the safety rope, thus ensuring that a protective rope that can provide protection is always maintained regardless of changes in the distance between outriggers 2 and 3.

[0046] This invention uses a protective rope as a guardrail. During installation, workers only need to pull the rope, and a winch tightens it via a wire rope to form a temporary guardrail. This can replace a temporary guardrail for edge protection on the bridge deck between the second and third legs of the bridge erecting machine, ensuring the safety of personnel on it. In actual use, the protective rope may sag slightly in the middle when it is taut, as long as it maintains an effective protective height. While fulfilling the guardrail function, the combination of the wire rope, winch, and first single-wheel pulley 19 can also be used to hoist objects on the bridge, realizing the [missing information - likely a specific function or feature]. The device is dual-purpose, economical, and practical. The protective ropes are located on both sides of the bridge erecting machine, allowing it to move directly with the machine during normal operation. It eliminates the need for installation and disassembly on each bridge deck, unlike traditional temporary steel pipe railings which require relocation with the machine, thus saving significant labor. Once the bridge erecting machine completes the project, if there is no further need for its use, the entire device can be disassembled, and the machine restored to its original state. Furthermore, the protective ropes can be wound into multiple layers to create a more complex railing structure, with the length adjusted according to the number of layers, such as four or six layers.

[0047] like Figure 1 , Figure 7As shown, in one embodiment, the rope fixing frame 17 includes fixing frames fixed on the left and right sides of the third support leg 3 and two guide wheels set on the fixing frames. The fixing frame is generally in the shape of an inverted T. The two guide wheels are spaced apart in the vertical direction along the free end of the fixing frame. The protective rope first passes through the lower guide wheel and then through the upper guide wheel, thereby forming a double-line guardrail structure. According to general guardrail requirements, the height of the lower protective rope is 0.5m-0.6m from the bridge surface, and the height of the upper protective rope is 1.1m-1.2m from the bridge surface. In other embodiments, only one guide wheel can be set on the rope fixing frame 17. In this case, the position of the guide wheel is about 1.2m from the bridge surface. Taking the construction of precast beams for highways as an example, the length is generally 18 meters. If a double-layer guardrail is used, due to the space occupied by the second support leg 2 and the third support leg 3, the length of the protective rope on one side is about 16*2=36 meters.

[0048] In actual use, only one winch on each side of the bridge erecting machine needs to have a hoisting function to meet the requirements. After the beam is placed on the pier, the position of the second leg 2 is at the front end of the already erected bridge deck. Therefore, in one embodiment, the winch located at the left end of the second leg 2 is referred to as the first winch 5, which only has a protective state; the winch located at the right end of the second leg 2 is referred to as the second winch 10, which can perform the protective state of the protective rope and the hoisting function, making it convenient to hoist objects from under the bridge at the end of the bridge deck.

[0049] like Figures 1 to 3 As shown, the first winch 5 is mounted on the side of the second support leg 2 facing the third support leg 3 via the first base 15; correspondingly, the first winch 5 is connected to the first wire rope 6, the end of the first wire rope 6 is connected to the first hook 7, and a baffle 24 is provided between the first hook 7 and the first wire rope 6; the first wire rope 6 can be detachably connected to the end of the first protective rope 8 via the first hook 7.

[0050] like Figures 1 to 2 , Figures 4 to 6 As shown, the second winch 10 is mounted on the bottom surface of the main boom of the second outrigger 2 and above the wheel of the second outrigger 2 via the second base 16, and the cable exit direction of the second winch 10 is to the right. The first single-car pulley is located on the upper right side of the second winch 10, and the first single-car pulley is located on the outer side of the bridge deck to facilitate the hoisting of items under the bridge. Correspondingly, a second wire rope 11 is connected to the second winch 10, and a second hook 12 is connected to the end of the second wire rope 11. A baffle 24 is provided between the second hook 12 and the second wire rope 11. The second wire rope 11 can be detachably connected to the end of the second protective rope 13 through the second hook 12.

[0051] A traction ring 25 is installed on the bottom surface of the main boom of outrigger 2, located to the right of the second winch 10. A fixed pulley 20 is installed at the rightmost end of the bottom surface of the main boom of outrigger 2. When in protective mode, such as Figure 4 , Figure 5 As shown, the second wire rope 11 is wrapped around the second single-wheel pulley 18, and the second single-wheel pulley 18 is hooked on the traction ring 25, so that the second wire rope 11 is turned 90° and connected to the second protective rope 13. Figure 4 , Figure 5 The image shows a China Railway Science & Industry JQ900A bridge erecting machine equipped with this device. The second support leg 2 of the China Railway Science & Industry JQ900A bridge erecting machine has a fixed frame 23 for installing other equipment. The second wire rope 11 can only be connected to the second protective rope 13 after turning from the second winch 10 and passing through the fixed frame.

[0052] like Figure 6 As shown, when in the hoisting state, the second single-wheel pulley 18 is disengaged from the traction ring 25. The second single-wheel pulley 18 is simply hanging on the second wire rope 11. The second wire rope 11, which is led out from the second winch 10, passes under the fixed pulley 20 and goes around to the top of the first single-wheel pulley 19, and then extends downward to realize the hoisting of objects from under the bridge.

[0053] Based on the above embodiments, such as Figures 1 to 8 As shown, rope frames are provided on the left and right ends of the second support leg 2 facing the third support leg 3; the first rope frame 9 corresponds to the first winch 5 and the second rope frame 14 corresponds to the second winch 10; rope fixing parts 26 for hooking and fixing one end of the protective rope are provided at the lower ends of the first rope frame 9 and the second rope frame 14.

[0054] When in a protective state, one end of the protective rope is fixed to the rope fixing member 26, and the other end of the protective rope is connected to the end of the wire rope after passing through the guide wheel of the rope fixing frame 17, forming a double-line guardrail structure.

[0055] When in the hoisting state, one end of the second protective rope 13 is fixed to the rope fixing member 26, and the other end of the second protective rope 13 is fixed to the rope fixing frame 17 through a temporary rope fixing structure to form a single-line guardrail structure. The temporary rope fixing structure can be a component such as a saddle-type rope clamp that can be used to fix the rope. The end of the protective rope can be self-anchored to the upper end of the rope fixing frame 17 through the temporary rope fixing structure to maximize the height of the single-line guardrail. In actual work, since the hoisting function is used for a very short time, the guardrail function of the protective rope that is detached from the wire rope can be disused during the hoisting function. After the hoisting is completed, the wire rope and the protective rope can be reconnected to achieve the protective state.

[0056] Based on the above embodiment, a temporary fixing hook 22 is provided on the second rope frame 14. The temporary fixing hook 22 is located on the upper part of the second rope frame 14. The temporary fixing hook 22 is used to temporarily fix the other end of the second protective rope 13 in the protective state. During this period, the second outrigger 2 and the third outrigger 3 do not move. Figure 5 The image shows a schematic representation of the near-fixed hook 22. Figure 5 This is a schematic diagram of the rope frame structure on the side of the second outrigger 2 facing the third outrigger 3 when in the protective state; when in the hoisting state, the first protective rope 8 remains stationary, one end of the second protective rope 13 is fixed to the lower part of the second rope frame 14, and the other end of the second protective rope 13 is connected to the temporary hook 22 after passing through the rope fixing frame 17, forming a double-line guardrail structure.

[0057] Furthermore, such as Figure 1 , Figure 3 As shown, the rope fixing frame 17 extends outward to the position corresponding to the winch on the third outrigger 3, so that the guardrail structure formed by the protective rope is set in the front-to-back direction; the rope fixing frame 17 on one side is aligned with the positions of the first rope frame 9 and the second rope frame 14 respectively, and is basically aligned front-to-back, with a slight deviation in height. The protective rope is a steel wire rope with a diameter of 10mm or more, and warning items such as triangular flag strings and cloth strips can also be set on the protective rope.

[0058] Furthermore, such as Figures 2 to 6 As shown, a limit frame 21 is provided at the location of the winch, and the limit frame 21 is set on the mounting frame of the winch or on the outer casing of the winch; the wire rope output by the winch passes through the limit frame 21; the baffle 24 can be circular or square, etc., the height of the limit frame 21 is less than the diameter of the baffle 24, and the length of the limit frame 21 is greater than the diameter of the baffle 24, so that the baffle 24 in a vertical state cannot pass through the limit frame 21, while the baffle 24 in a horizontal state can pass through the limit frame 21. The baffle 24 in a horizontal state requires manual intervention; during normal use, the baffle 24 acts as a limit stop to prevent the hook from getting caught in the drum of the winch.

[0059] It is understood that the above description is merely exemplary and the embodiments of this application are not intended to limit the scope of the invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A bridge erecting machine protective hoisting integrated device, used for the protection of the bridge erecting machine and the hoisting of objects under the bridge, the bridge erecting machine comprising a main beam (4) and a first leg (1), a second leg (2) and a third leg (3) respectively arranged along the front and rear directions on the main beam (4), characterized in that: The bridge erecting machine protective hoisting integrated device includes a winch set at the lower left and right ends of the second leg (2), a wire rope wound on the winch drum, a first single pulley set on the second leg (2) and positioned higher than the winch, rope fixing frames (17) respectively installed on the lower sides of the third leg (3), and a protective rope connected to the rope fixing frame (17). The bridge erecting machine's integrated protective and hoisting device has two working states: a protective state and a hoisting state. Protection status: The end of the protective rope away from the rope fixing frame (17) is connected to the end of the wire rope. The winch pulls the protective rope taut through the wire rope so that it is erected on the left and right sides of the bridge erecting machine to form a guardrail structure. Lifting status: The wire rope is wound around the first single-vehicle pulley and a hook is set at the end of the wire rope. The object between the bridge deck and the bridge bottom is lifted by controlling the winch.

2. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: The second support leg (2) has rope frames on both sides facing the third support leg (3); When in a protective state, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is connected to the end of the wire rope after passing through the rope fixing frame (17), forming a double-line guardrail structure. When in the hoisting state, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is fixed to the rope fixing frame (17) through a temporary rope fixing structure to form a single-line guardrail structure.

3. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: Rope frames are provided on both sides of the second support leg (2) facing the third support leg (3), and temporary hooks (22) are provided on the rope frame or on the second support leg (2) near the rope frame. When in a protective state, one end of the protective rope is fixed to the rope frame, and the other end of the protective rope is connected to the end of the wire rope after passing through the rope fixing frame (17), forming a double-line guardrail structure. When in the hoisting state, one end of the protective rope is fixed on the rope frame, and the other end of the protective rope is connected to the temporary hook (22) after passing through the rope fixing frame (17) to form a double-line guardrail structure.

4. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: The rope fixing frame (17) extends outward to the outside of the third outrigger (3) to a position corresponding to the winch, so that the protective rope guardrail structure is set in the front-to-back direction.

5. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: The rope fixing frame (17) includes a fixing frame fixed on the left and right sides of the third support leg (3) and two guide wheels set on the fixing frame. The two guide wheels are spaced apart in the vertical direction.

6. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: The winch located at the left end of the second outrigger (2) is designated as the first winch (5). The first winch (5) is in a protective state only. The first winch (5) is located on the side of the second outrigger (2) facing the third outrigger (3).

7. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: The winch located at the right end of the second outrigger (2) is designated as the second winch (10). The second winch (10) is located on the bottom surface of the main boom of the second outrigger (2), and the cable exit direction of the second winch (10) is to the right. The first single-car pulley is located on the upper right side of the second winch (10). The first single-car pulley is located on the outer side of the bridge deck to facilitate the hoisting of items under the bridge.

8. The integrated protective hoisting device for bridge erecting machines according to claim 7, characterized in that: The second outrigger (2) has a traction ring (25) located on the right side of the second winch (10) on the bottom surface of the main boom. When in the protective state, the wire rope of the second winch (10) is wrapped around the second single-wheel pulley (18), which is hooked on the traction ring (25), so that the wire rope of the second winch (10) turns 90° and connects with the protective rope. When in the hoisting state, the second single-wheel pulley (18) is disengaged from the traction ring (25).

9. The integrated protective hoisting device for bridge erecting machines according to claim 7, characterized in that: The rightmost end of the main boom of the second outrigger (2) is provided with a fixed pulley (20); when in the hoisting state, the wire rope of the second winch (10) passes under the fixed pulley (20) and goes around to the top of the first single wheel trolley (19) before extending downward to realize the hoisting of objects from the bottom of the bridge.

10. The integrated protective hoisting device for bridge erecting machines according to claim 1, characterized in that: A hook is provided at the end of the wire rope, and a baffle (24) is provided between the hook and the wire rope. A limit frame (21) is provided at the position of the winch, and the wire rope passes through the limit frame (21). The height of the limit frame (21) is less than the diameter of the baffle (24), and the length of the limit frame (21) is greater than the diameter of the baffle (24). Thus, the baffle (24) in a vertical state cannot pass through the limit frame (21), while the baffle (24) in a horizontal state can pass through the limit frame (21).

Images