A bridge rotation device and rotation construction method relying on deadweight as a power source

Abstract

The present invention discloses a bridge swivel device and a swivel construction method that relies on deadweight as a power source. The bridge swivel device includes a base, an upper turntable, and a swivel mechanism. The base is used to support the entire bridge swivel device and the bridge on it. The upper turntable is mounted on the base via the swivel mechanism and is used to support the bridge to be rotated. The swivel mechanism includes a plurality of spiral slides fixedly mounted on the base and a spiral slide rod that can freely move up and down and is assembled in each spiral slide. All the spiral slides together form a spiral lifting slideway, so that the spiral slide rods rotate when sliding up and down relative to the spiral slides, thereby converting the deadweight of the upper turntable and the bridge on it into rotational power. The present invention is simple and convenient to operate, has a high degree of automation, and a simple construction process. It can accurately control the rotation angle of the swivel bridge.

Description

Technical Field

[0001] The present invention belongs to the field of bridge construction and relates to a bridge rotation device, in particular to a bridge rotation device which relies on deadweight as a power source and a rotation construction method. Background Art

[0002] A rotating bridge is a bridge constructed using the rotation method. Bridge rotation construction refers to a construction method in which the bridge structure is formed (cast or spliced) in a position other than the design axis and then rotated into place. It can transform operations above obstacles into operations on shore or near the ground. Depending on the direction of rotation of the bridge structure, it can be divided into vertical rotation construction method, horizontal rotation construction method (referred to as vertical rotation method and horizontal rotation method), and a combination of horizontal and vertical rotation methods, of which the horizontal rotation method is the most commonly used. It is mainly used in situations where support is not possible, such as crossing canyons, rivers, railways, and highways.

[0003] Currently, most rotating bridges in China use a flat spherical joint. The core component of a rotating bridge is the rotating system, which basically consists of an upper turntable, a base, a spherical joint, a slideway, a support leg, a center pin, a sand box, a jack reaction seat, and a rotating traction system. Currently, the rotation construction process of a rotating bridge generally uses a jack to pull the traction cable, generating a rotating force to occasionally achieve rotation. This method has problems such as difficult to control the rotation angle, large traction force, over-rotation during rotation, and inability to rotate. In addition, the rotation construction process consists of a static state, a rotation, and then a static state again. The rotation amplitude is generally large, making it impossible to rotate to the desired position in one step. The rotation is usually performed in a step-by-step manner. During each step, the bridge must overcome static friction to rotate, then continue to rotate under dynamic friction for a period of time before stopping. Because the rotating devices in the existing technology all use spherical joints and are in positive pressure contact, the static friction is very large, even far greater than the dynamic friction. Coupled with the huge inertia of the bridge, the bridge rotation process is extremely difficult to control, and only very small steps can be made at a time. This not only reduces safety but also reduces control accuracy. Therefore, it is necessary to design a new bridge rotation device to reduce static friction and make the rotation process easier to control, thereby improving the rotation accuracy and shortening the rotation cycle. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and a construction method for bridge rotation that relies on its own weight. The device is simple and convenient to operate, has a high degree of automation, a simple construction process, and can accurately control the rotation angle of the rotating bridge.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A bridge rotation device that relies on its own weight as a power source, comprising

[0007] Base, used to support the entire bridge swivel device and the bridge on it;

[0008] The upper turntable is mounted on the base through a rotating mechanism and is used to support the bridge to be rotated;

[0009] The rotating mechanism includes several spiral slides fixedly mounted on the base and a spiral slide rod that can move freely up and down and is assembled in each spiral slide. All the spiral slides together constitute a spiral lifting slide, so that the spiral slide rod rotates during the process of sliding up and down relative to the spiral slide, thereby converting the deadweight of the upper turntable and the bridge above it into rotational power.

[0010] In another aspect, the present invention provides a bridge rotation construction method based on the above-mentioned bridge rotation device, comprising the following steps:

[0011] Bridge construction: construct the bridge according to design requirements and set up temporary supports;

[0012] The bridge rotation device is constructed below the bridge rotation support point according to the structure of the bridge rotation device;

[0013] The bridge rotates by slowly removing the temporary supports of the bridge. The bridge's own weight is converted into rotation power through the contact of the spiral lifting slide. When the bridge rotation meets the design requirements, temporary supports are set up again, and the bridge rotation device is removed. Then, permanent supports are set up for the bridge to complete the bridge rotation construction.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention utilizes the deadweight of the bridge as the driving force and can control the driving force by designing the pitch size, so that the bridge can rotate smoothly without traction or with very little traction, converting the large-tonnage rotation power into small-force control, greatly reducing the difficulty of rotation and improving the rotation accuracy.

[0016] The present invention uses a swivel mechanism to simply guide and convert the weight of the bridge into rotational power, and uses an auxiliary support guide device to control and adjust the size of the rotational power. The functions of the two spiral guide devices, the swivel mechanism and the auxiliary support guide device, are designed to be functionally differentiated. The friction surface of the auxiliary support guide device is designed to be replaceable, so the size of the friction force can be changed at any time according to the situation, which can greatly improve the adaptability and rotation accuracy.

[0017] Because the additional driving force required by the present invention is greatly reduced through the spiral action, the rotation period of the present invention is significantly shorter than that of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the bridge rotation device in Example 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the rotating mechanism in Example 1 of the present invention.

[0020] Figure 3 This is a schematic diagram of the rotation of the bridge rotation device in Example 1 of the present invention.

[0021] Figure 4 This is a schematic structural diagram of the bridge rotation device in Example 2 of the present invention.

[0022] Figure 5 Schematic diagram of adding an auxiliary power device to the bridge rotation device in Example 2 of the present invention.

[0023] 1-rotating mechanism, 101-spiral slide, 102-spiral slide rod, 103-connecting part, 4-base, 6-spiral slide, 601-steel plate, 7-support foot, 701-support column, 702-wedge-shaped slider, 9-upper turntable, 10-bridge, 11-anchor, 12-traction rope, 13-hydraulic cylinder, 14-telescopic cylinder. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] Example 1, as Figure 1 and Figure 2 As shown, a bridge rotation device that relies on its own weight as a power source includes

[0028] Base 4, used to support the entire bridge swivel device and the bridge 10 thereon;

[0029] The upper turntable 9 is mounted on the base 4 via the rotating mechanism 1 and is used to support the bridge 10 to be rotated;

[0030] The rotating mechanism 1 includes a plurality of spiral slides 101 fixedly mounted on the base 4 and a spiral slide rod 102 which can freely move up and down and is assembled in each spiral slide 101. All the spiral slides 101 together constitute a spiral lifting slide, so that the spiral slide rod 102 rotates during the process of sliding up and down relative to the spiral slide 101, thereby converting the self-weight of the upper turntable 9 and the bridge 10 above it into rotational power.

[0031] During rotation, the bridge rotation device can be constructed at the rotation center point below the bridge 10. The base 4 is constructed on the pile foundation designed for the bridge pier foundation and can be a concrete structure or a steel structure. The upper turntable 9 can also be a concrete structure or a steel structure. Figure 3 The specific rotation method is as follows:

[0032] Construction of the bridge 10: constructing the bridge 10 according to the design requirements and setting up temporary supports;

[0033] The bridge swivel device is constructed according to the structure of the bridge swivel device, and the bridge swivel device is constructed below the swivel support point of the bridge 10;

[0034] The bridge 10 rotates, and the temporary support of the bridge 10 is slowly removed. The weight of the bridge 10 is converted into rotation power through the contact of the spiral lifting slide. When the rotation of the bridge 10 meets the design requirements, temporary support is set again, and the bridge rotation device is removed. Then, permanent support is set for the bridge 10 to complete the rotation construction of the bridge 10.

[0035] It should be noted that when dismantling the bridge rotation device, only the rotation mechanism 1 can be dismantled, and concrete can be poured between the base 4 and the upper turntable 9 to form a permanent support or a permanent shock-absorbing structure can be set up for support, depending on the design specifications of the bridge 10.

[0036] It can be foreseen that, based on the need for relative motion of the rotating mechanism 1 of the present invention, the spiral slide 101 and the spiral slide rod 102 are generally made of steel structure. In order to facilitate smooth rotation and prevent jamming and damage caused by foreign objects, the contact surface between the spiral slide rod 102 and the spiral slide 101 can be coated with grease. When applying grease, one of them or both can be applied. In this way, even if small debris enters the spiral slide 101, the rotation can proceed smoothly.

[0037] Based on the above technical principles, it can be foreseen that in order to maintain stability, the present invention requires at least two spiral slides 101. Of course, the number of spiral slides 101 can be more, generally 3-5, to ensure stability and complexity.

[0038] As a common sense understanding, several spiral slides 101 of the present invention together constitute a spiral lifting slide. Therefore, several spiral slides 101 need to be distributed around the rotation axis, and the pitch and rotation radius of each spiral slide 101 are the same; as an optimal embodiment, all spiral slides 101 are made with the same size and shape, which can ensure that the rotation is carried out without resistance.

[0039] As a preferred embodiment, in order to improve the rotational stability, several spiral slides 101 are fixed by connecting members 103, and several spiral slide rods 102 are also fixed by connecting members (the spiral slide rods 102 can only be fixed at the top).

[0040] As a preferred embodiment, in order to improve stability, the upper turntable 9 and the base 4 are both steel-concrete structures. The spiral slide 101 is welded to the steel cage of the base 4 before pouring, and the spiral slide rod 102 is also welded to the steel cage inside the upper turntable 9 before pouring. During the subsequent dismantling process, the spiral slide 101 and the spiral slide rod 102 can be cut separately, or cast in between as part of the structure.

[0041] It should be noted that, according to the technical principles of the present invention, the installation positions of the spiral slide 101 and the spiral slide rod 102 of the present invention can be exchanged. Of course, under normal circumstances, it is more in line with construction practices to set the spiral slide 101 on the base 4, and the base 4 has more space for setting the spiral slide 101.

[0042] Example 2, as Figure 4 As shown, on the basis of Example 1, an auxiliary support and guide device for increasing the stability of the rotation is added, and the auxiliary support and guide device includes a spiral slide 6 provided on the base 4 and a support foot 7 fixedly provided on the bottom of the upper turntable 9, and the lower end of the support foot 7 and the top of the spiral slide 6 are in contact with the friction surface; the spiral slide 6 is coaxially arranged with the spiral lifting slide, and the lifting pitch is the same.

[0043] Specifically, the support leg 7 of the present invention includes a support column 701 and a wedge-shaped slider 702 provided at the bottom of the support column 701 . The bottom of the wedge-shaped slider 702 is a friction surface in contact with the top of the spiral slide 6 .

[0044] By selecting the material type or roughness of the friction surface contact, the downward component of the gravity of the upper turntable 9 and the bridge 10 on it along the friction surface is roughly equivalent to the friction surface. Optimally, the downward component of the gravity of the upper turntable 9 and the bridge 10 on it along the friction surface is slightly smaller than the friction between the bottom of the wedge slider 702 and the friction surface at the top of the spiral slide 6. In this way, during the rotation process, after the temporary support is removed, the bridge 10 can rotate slowly without the need for excessive additional traction, which greatly improves the safety of the rotation process, prevents accidents, and improves the accuracy of the rotation control. Of course, even if the downward component of the gravity along the friction surface is slightly larger than the friction between the bottom of the wedge slider 702 and the friction surface at the top of the spiral slide 6, it does not have much impact, and a slight external force can be applied to smoothly turn. In this embodiment, the rotating mechanism 1 is simply responsible for guiding and converting the weight of the bridge 10 into rotational power, and the magnitude of the rotational power is controlled and adjusted by the auxiliary support and guiding device.

[0045] It can be foreseen that in order to adjust the friction force, the spiral slide 6 of the present invention itself can adopt a concrete structure, but a friction surface with a detachable connector is reserved on the top. The friction surface can be a steel plate 601 with matching shape, and the friction coefficient can be adjusted according to the roughness of the steel plate surface processing or coating.

[0046] The present invention calculates the rotational power and contact positive pressure based on the dead weight of the bridge 10 and the inclination angle of the friction surface (calculated based on the pitch) to obtain the required matching friction force, and then calculates the required matching friction coefficient based on the friction surface area and positive pressure of the friction surface, and selects the corresponding material or processing roughness based on the friction coefficient.

[0047] When the actual rotation process, the rotation power and friction force do not match, resulting in the inability to rotate or the rotation speed is too fast, the existing calculation can be used to provide auxiliary power. For ease of understanding, the present invention provides an auxiliary power device, such as Figure 5 As shown, the auxiliary power device includes a traction rope 12 wound around the upper turntable 9 and a hydraulic cylinder 13 provided on the base 4 and connected to the steel wire. The hydraulic cylinder 13 is arranged tangentially along the upper turntable 9. The steel wire is driven by the hydraulic cylinder 13 to provide auxiliary force for the rotation of the upper turntable 9. The hydraulic cylinder 13 can be set to at least two or symmetrically for easy force application. Different from the prior art, the present invention makes the rotation power much smaller than that in the prior art through the coordinated design of the swivel mechanism 1 and the auxiliary support guide device. Therefore, the ordinary hydraulic cylinder 13 and the traction rope 12 can complete the rotation, which greatly improves the rotation safety and rotation accuracy and saves construction time.

[0048] It should be noted that the temporary support device of the present invention can refer to the existing technology, and can also be a plurality of telescopic cylinders 14 arranged in vertical directions between the upper turntable 9 and the base 4, and the telescopic cylinders 14 are used to further improve the safety of the rotation.

[0049] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be encompassed by the scope of the claims of the present invention.

Claims

1. A bridge rotation device that relies on its own weight as a power source, characterized in that: include Base, used to support the entire bridge swivel device and the bridge on it; The upper turntable is mounted on the base through a rotating mechanism and is used to support the bridge to be rotated; The rotating mechanism includes a plurality of spiral slides fixedly mounted on the base and spiral slide rods that can freely move up and down and are assembled in each spiral slide. All the spiral slides together form a spiral lifting slideway, so that all the spiral slide rods rotate synchronously when sliding up and down relative to the spiral slides, thereby converting the deadweight of the upper turntable and the bridge above it into rotational power. An auxiliary support and guide device is provided between the upper turntable and the base to increase the stability of the rotation. The auxiliary support and guide device includes a spiral slide provided on the base and a support foot fixedly provided on the bottom of the upper turntable. The lower end of the support foot and the top of the spiral slide are in contact with each other through a friction surface. The spiral slide is coaxially arranged with the spiral lifting slide and has the same lifting pitch. The supporting foot comprises a supporting column and a wedge-shaped slider arranged at the bottom of the supporting column, and the bottom of the wedge-shaped slider is a friction surface in contact with the top of the spiral slideway.

2. The bridge rotation device according to claim 1, characterized in that: By selecting the material type or roughness of the friction surface contact, the downward component of the gravity of the upper turntable and the bridge above it along the friction surface is made equivalent to that of the friction surface.

3. The bridge rotation device according to claim 1, characterized in that: There are 2 to 5 slides, and all the spiral slides are made in one piece or connected by connectors to form a whole.

4. The bridge rotation device according to claim 1, characterized in that: All the spiral slides are evenly distributed around the axis of the spiral lifting slideway.

5. The bridge rotation device according to claim 1, characterized in that: It also includes an auxiliary power device, which includes a traction rope wound around the upper turntable and a hydraulic cylinder located on the base and connected to the steel wire. The hydraulic cylinder is arranged tangentially along the upper turntable, and the steel wire is driven by the hydraulic cylinder to provide auxiliary force for the rotation of the upper turntable.

6. The bridge rotation device according to claim 1, characterized in that: A telescopic oil cylinder for setting in several vertical directions is also provided between the upper turntable and the base.

7. A bridge rotation construction method, using the bridge rotation device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Bridge construction: construct the bridge according to design requirements and set up temporary supports; The bridge rotation device is constructed below the bridge rotation support point according to the structure of the bridge rotation device; The bridge rotates by slowly removing the temporary supports of the bridge. The bridge's own weight is converted into rotation power through the contact of the spiral lifting slide. When the bridge rotation meets the design requirements, temporary supports are set up again, and the bridge rotation device is removed. Then, permanent supports are set up for the bridge to complete the bridge rotation construction.

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