Auxiliary turnover device for hoisting prestressed roof truss

Abstract

The utility model discloses an auxiliary turnover device for prestressed roof truss hoisting, which belongs to the technical field of prestressed roof truss hoisting and comprises a hoisting frame, a fixed pulley, a hoisting rope, a vertical guide rod, a hoisting frame, a guide wheel, a winch, a hoisting rope and a hoisting rope cut-off structure. The device is scientific in design, reasonable in structure, simple to operate and convenient to use, can stably turn over and erect the prestressed roof truss, is matched with a hoisting machine in use, can synchronously turn over and hoist the prestressed roof truss, simplifies the hoisting process of the prestressed roof truss, and improves the hoisting efficiency of the prestressed roof truss. The hoisting efficiency of the prestressed roof truss is greatly improved, and the construction period of the prestressed roof truss is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of prestressed roof truss hoisting technology, specifically a prestressed roof truss hoisting auxiliary turning device. Background Technology

[0002] Prestressed roof trusses are a special type of roof truss used in building structures. They improve the overall performance of the structure by pre-stressing the steel bars or strands within it. This technology effectively reduces cracking in concrete structures, increases their stiffness and load-bearing capacity, and can save materials to some extent. Prestressed technology is mainly used in bridges, long-span buildings (such as stadiums and exhibition halls), and some industrial plants that need to withstand large loads.

[0003] Because prestressed roof trusses have long spans, large volumes, and heavy weights, the stability and safety of the hoisting process are extremely important. For safety reasons, existing technologies employ a distributed hoisting method when hoisting prestressed roof trusses, typically involving two steps: turning over and then lifting.

[0004] The first step is to turn the prestressed roof truss over: lift it from a flat position to a fully upright position. This process involves turning the prestressed roof truss over with its bottom edge as the axis until the prestressed roof truss is completely upright.

[0005] The second step is hoisting: After the prestressed roof truss is fully erected and stabilized, ropes are fixed on both sides of the prestressed roof truss, and the erected prestressed roof truss is hoisted and installed using hoisting machinery.

[0006] The above-mentioned step-by-step hoisting operation method is cumbersome and greatly reduces the hoisting efficiency of prestressed roof trusses. Summary of the Invention

[0007] The purpose of this invention is to solve the problems mentioned in the background art by providing a prestressed roof truss hoisting and turning device.

[0008] This utility model is achieved through the following technical solution:

[0009] A prestressed roof truss hoisting auxiliary turning device includes a hanger, fixed pulleys, a hoisting rope, vertical guide rods, a lifting frame, guide wheels, a winch, a hoisting rope, and a hoisting rope stop structure. Fixed pulleys are rotatably mounted at both ends of the bottom of the hanger. Vertical guide rods are slidably inserted into both sides of the middle of the hanger. The lower ends of the two vertical guide rods are fixedly connected to the lifting frame. Guide wheels are rotatably mounted at both ends of the lifting frame. A hoisting rope is wound between the fixed pulley and the guide wheel on the same side. A winch is installed in the middle of the hanger, and a hoisting rope is mounted on the winch. The lower end of the hoisting rope is connected to the lifting frame. A hoisting rope stop structure is installed on the lifting frame.

[0010] Preferably, the suspension rope stopping structure includes a telescopic cylinder and a sliding plate. The telescopic cylinder is fixedly installed in the middle of the lifting frame. The telescopic end of the telescopic cylinder is fixedly connected to the sliding plate. The sliding plate is slidably mounted on the vertical guide rod and the lifting rope. The width of the sliding plate is wider than the distance between the inner ends of the two guide wheels and narrower than the distance between the centers of the two guide wheels.

[0011] Preferably, a lifting lug is fixedly installed on the upper end of the hanger.

[0012] Preferably, the winch is an electric winch.

[0013] Preferably, the telescopic cylinder is an electric telescopic cylinder.

[0014] This utility model device is scientifically designed, structurally reasonable, simple to operate, and easy to use. It can stably flip and erect prestressed roof trusses. When used in conjunction with hoisting machinery, it can realize the flipping and hoisting of prestressed roof trusses simultaneously, simplifying the hoisting process of prestressed roof trusses, greatly improving the hoisting efficiency of prestressed roof trusses, and shortening the construction period of prestressed roof trusses. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the device of this utility model.

[0016] Figure 2 This is a schematic diagram of the working state structure of the device of this utility model.

[0017] In the diagram: 1. Hanger; 2. Fixed pulley; 3. Lifting rope; 4. Vertical guide rod; 5. Lifting frame; 6. Guide wheel; 7. Winch; 8. Lifting rope; 9. Telescopic cylinder; 10. Slide plate; 11. Lifting lug; 12. Prestressed roof truss; 13. Lifting machinery. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "left", "right", "middle", "upper", "lower", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "insertion," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figure 1-2This utility model provides a prestressed roof truss 12 hoisting auxiliary turning device, including a hanger 1, fixed pulleys 2, hoisting ropes 3, vertical guide rods 4, lifting frame 5, guide wheels 6, winch 7, lifting rope 8, and a hoisting rope cut-off structure; fixed pulleys 2 are rotatably installed at the left and right ends of the bottom of the hanger 1; vertical guide rods 4 are slidably inserted into the left and right sides of the middle of the hanger 1; the lower ends of the two vertical guide rods 4 are fixedly connected to the lifting frame 5, and guide wheels 6 are rotatably installed at the left and right ends of the lifting frame 5; the hoisting rope 3 is provided with two sections, and the two sections of the hoisting rope 3 are respectively wound around the fixed pulley 2 and the guide wheel 6 located on the same side, that is, the left section of the hoisting rope 3 is wound around the left fixed pulley 2 and the left guide wheel 6, and the right section of the hoisting rope 3 is wound around the right fixed pulley 2 and the right guide wheel 6; a winch 7 is installed in the middle of the hanger 1, and a lifting rope 8 is provided on the winch 7, the lower end of the lifting rope 8 and the lifting frame 5 are connected together. The lifting frame 5 is connected; a rope-stopping structure is installed on the lifting frame 5, which includes a telescopic cylinder 9 and a sliding plate 10. The telescopic cylinder 9 is fixedly installed in the middle of the lifting frame 5, and the telescopic end of the telescopic cylinder 9 is fixedly connected to the sliding plate 10. The sliding plate 10 is located above the lifting frame 5 and is slidably fitted on the vertical guide rod 4 and the lifting rope 8. The width of the sliding plate 10 is wider than the distance between the inner ends of the two guide wheels 6 and narrower than the distance between the centers of the two guide wheels 6. When the rope-stopping structure is working, when it is necessary to lock the position of the rope 3, the telescopic cylinder 9 moves the sliding plate 10 downward under the guidance of the vertical guide rod 4. Then, the left and right ends of the sliding plate 10 are respectively squeezed onto the two guide wheels 6, so that the two sections of rope 3 wrapped on the two guide wheels 6 are squeezed and fixed by the sliding plate 10 and the guide wheels 6, thereby achieving the purpose of locking the position of the rope 3.

[0022] In this utility model, a lifting lug 11 is fixedly installed on the upper end of the hanger 1, which facilitates the installation of this device on the hoisting machinery 13 (crane, etc.).

[0023] In this utility model, the winch 7 is an electric winch, and the telescopic cylinder 9 is an electric telescopic cylinder.

[0024] Those skilled in the art can connect all electrical components (winch 7, telescopic cylinder 9) and their compatible power supplies with wires. Appropriate controllers should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0025] The overall process of hoisting the prestressed roof truss 12 using the device of this utility model and hoisting machinery 13 (crane, etc.) is as follows:

[0026] 1) The entire device of this utility model is connected to the sling of the hoisting machinery 13 (crane, etc.) by the lifting lug 11 on the sling 1.

[0027] 2) Fix the two ends of the left suspension rope 3 to the left end and the top of the middle part of the prestressed roof truss 12 respectively, and fix the two ends of the right suspension rope 3 to the right end and the top of the middle part of the prestressed roof truss 12 respectively.

[0028] 3) The device and the prestressed roof truss 12 of this utility model are lifted and hoisted upwards using hoisting machinery 13 (crane, etc.). During the hoisting process, the device of this utility model simultaneously completes the turning operation of the prestressed roof truss 12, so as to achieve the purpose of the turning and hoisting steps of the prestressed roof truss 12 being carried out simultaneously.

[0029] The process of this utility model device turning over the prestressed roof truss 12 is as follows:

[0030] ① The suspension rope 3 is squeezed by the suspension rope cut-off structure, thereby cutting off the position of the suspension rope 3. That is, the telescopic cylinder 9 is controlled to move the slide plate 10 downward under the guidance of the vertical guide rod 4. Then, the left and right ends of the slide plate 10 are squeezed onto the left and right guide wheels 6 respectively, so that the two sections of suspension rope 3 wrapped on the left and right guide wheels 6 are squeezed and fixed by the slide plate 10 and the guide wheels 6.

[0031] ② The operation of the winch 7 drives the lifting frame 5 to move upward, which in turn drives the connection between the hoisting rope 3 and the top of the prestressed roof truss 12 to rise, thereby causing the prestressed roof truss 12 to turn over and stand upright.

[0032] ③ The reverse action of the suspension rope cut-off structure releases the compression and fixation of the suspension rope 3. Then, under the guidance of the fixed pulley 2, the gravity of the prestressed roof truss 12 causes the suspension rope 3 to be tensioned, so that the force of the suspension rope 3 acting on the middle part of the prestressed roof truss 12 and the force acting on the end of the prestressed roof truss 12 are balanced. Through the flexible transmission composed of the fixed pulley 2, the guide wheel 6 and the suspension rope 3, the prestressed roof truss 12 can be turned up more stably and safely.

[0033] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed roof truss hoisting and turning auxiliary device, characterized in that, The system includes a hanger (1), a fixed pulley (2), a lifting rope (3), a vertical guide rod (4), a lifting frame (5), a guide wheel (6), a winch (7), a lifting rope (8), and a lifting rope stop structure. The two ends of the bottom of the hanger (1) are rotatably equipped with fixed pulleys (2). The two sides of the middle part of the hanger (1) are slidably inserted with vertical guide rods (4). The lower ends of the two vertical guide rods (4) are fixedly connected to the lifting frame (5). The two ends of the lifting frame (5) are rotatably equipped with guide wheels (6). A lifting rope (3) is wound between the fixed pulley (2) and the guide wheel (6) on the same side. A winch (7) is installed in the middle of the hanger (1). The winch (7) is equipped with a lifting rope (8). The lower end of the lifting rope (8) is connected to the lifting frame (5). The lifting frame (5) is equipped with a lifting rope stop structure.

2. The prestressed roof truss hoisting auxiliary turning device according to claim 1, characterized in that, The suspension rope cut-off structure includes a telescopic cylinder (9) and a sliding plate (10). The telescopic cylinder (9) is fixedly installed in the middle of the lifting frame (5). The telescopic end of the telescopic cylinder (9) is fixedly connected to the sliding plate (10). The sliding plate (10) is slidably mounted on the vertical guide rod (4) and the lifting rope (8). The width of the sliding plate (10) is wider than the distance between the inner ends of the two guide wheels (6) and narrower than the distance between the centers of the two guide wheels (6).

3. The prestressed roof truss hoisting auxiliary turning device according to claim 1, characterized in that, The upper end of the hanger (1) is fixedly installed with a lifting lug (11).

4. The prestressed roof truss hoisting auxiliary turning device according to claim 1, characterized in that, The winch (7) is an electric winch.

5. The prestressed roof truss hoisting auxiliary turning device according to claim 2, characterized in that, The telescopic cylinder (9) is an electric telescopic cylinder.

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