Double-rotation-plane swivel support with self-centering function

Abstract

The present application relates to the field of bridge construction, disclose a kind of double rotation surface swivel support with self-centering function, including middle seat plate, the top of the middle seat plate is fixedly connected with steering mechanism, the top of the middle seat plate is slidably connected with support mechanism, the steering mechanism includes rotating shaft, the bottom of the rotating shaft is fixedly connected with the top of middle seat plate, the inner wall of the middle seat plate is equipped with first wear plate groove, the inner wall of the middle seat plate is equipped with first sealing groove, the bottom of the middle seat plate is fixedly connected with boss, the outer surface of the rotating shaft is rotatably connected with upper spherical hinge. Bridge swivel is rotated by spherical surface rotating friction pair, when difficult to pull and jammed due to adverse working conditions, increase the pulling force to make the conical surface rotating pair enter the rotating working state, the design of conical surface can avoid the eccentricity caused by excessive pulling force, further strengthen the safety of swivel device, conical surface rotating pair cooperates with spherical surface rotating pair to ensure the smooth construction of bridge swivel.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a double-rotating surface swivel bearing with self-centering function. Background Technology

[0002] Double-rotating-plane slewing bearings are the core load-bearing components in bridge rotation construction, playing a crucial role in the bridge rotation construction process. They are used to support the bridge superstructure, guide rotation and calibrate position, and complete the angle adjustment and offset correction of the bridge beams, so as to facilitate the precise docking and positioning of bridges crossing lines and rivers. They are widely applicable to the construction sites of long-span highways, railways, viaducts and bridges across waterways.

[0003] When carrying out the rotation construction of long-span bridges across railway lines and rivers, and encountering adverse extreme conditions such as concrete voids under the supports, uneven settlement, temperature difference deformation, and other adverse conditions, it is necessary to rely on double-rotating-face rotation supports to ensure construction safety. Existing double-rotating-face rotation supports are mostly single-rotating-face designs and lack self-centering structures. During the rotation process, eccentricity and rotation jamming are very likely to occur, requiring frequent manual intervention to correct the deviation. This leads to a decrease in the accuracy of bridge rotation installation and a reduction in construction quality. At the same time, under extreme conditions, existing supports are prone to structural jamming and functional failure, which greatly increases the risk of bridge overturning. Conventional methods can only be used to deal with this by pulling and dragging, which will further aggravate structural damage and overturning risks, and cannot guarantee the smooth and safe conduct of rotation operations under extreme conditions. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a double-rotating-plane slewing support with self-centering function, which solves the problems of jamming and stuckness of the slewing device in the face of adverse working conditions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a double-rotating surface swivel support with self-centering function, comprising a middle base plate, a steering mechanism fixedly connected to the top of the middle base plate, a support mechanism slidably connected to the top of the middle base plate, the steering mechanism comprising a rotating shaft, the bottom end of the rotating shaft being fixedly connected to the top of the middle base plate, a first wear-resistant plate groove and a first sealing groove being formed on the inner wall of the middle base plate, a boss fixedly connected to the bottom of the middle base plate, an upper ball joint rotatably connected to the outer surface of the rotating shaft, a countersunk hole being formed on the inner wall of the upper ball joint, a conical wear-resistant plate slidably connected to the bottom of the middle base plate, wherein the inclined angle α of the conical rotating joint needs to meet the design principles mentioned in this patent, a support surface assembly being formed on the inner wall of the upper ball joint, and an upper anchor rod assembly being fixedly connected to the inner wall of the upper ball joint.

[0006] Preferably, the support mechanism includes a spherical wear-resistant plate, the outer surface of which is slidably connected to the top of the middle seat plate, a lower ball joint is rotatably connected to the bottom of the middle seat plate, a basin ring is fixedly connected to the top of the lower ball joint, a second groove is provided on the inner wall of the lower ball joint, an installation assembly is provided on the inner wall of the first sealing groove, and a lower anchor rod assembly is fixedly connected to the inner wall of the lower ball joint.

[0007] Preferably, the support surface assembly includes a first groove, which is formed on the inner wall of the upper ball joint, and a plurality of ribs are fixedly connected to the inner wall of the first groove.

[0008] Preferably, the upper anchor bolt assembly includes a first sleeve, the outer wall of the first sleeve being fixedly connected to the inner wall of the upper ball joint, and the inner wall of the first sleeve being threadedly connected to a first anchor bolt.

[0009] Preferably, the inner wall of the countersunk hole is rotatably connected to the outer surface of the rotating shaft, and the bottom of the upper ball joint is rotatably connected to the bottom of the middle seat plate.

[0010] Preferably, the mounting assembly includes a second sealing groove, which is formed on the inner wall of the lower ball joint, and the inner wall of the lower ball joint is provided with a second wear-resistant plate groove.

[0011] Preferably, the lower anchor bolt assembly includes a second sleeve, the outer wall of the second sleeve being fixedly connected to the inner wall of the lower ball joint, and the inner wall of the second sleeve being threadedly connected to a second anchor bolt.

[0012] Preferably, the inner surface of the basin ring is rotatably connected to the outer surface of the middle seat plate, and the inner wall of the second groove is rotatably connected to the outer surface of the boss.

[0013] Preferably, the outer wall of the spherical wear-resistant plate is rotatably connected to the inner wall of the first wear-resistant plate groove, and the outer wall of the conical wear-resistant plate is rotatably connected to the inner wall of the second wear-resistant plate groove.

[0014] This invention provides a double-rotating-plane support with self-centering function. It has the following beneficial effects: 1. This invention utilizes a dual positioning structure of self-centering conical surface and central axis guidance to automatically correct positional deviations after the bridge has rotated into place, eliminating the need for manual intervention. This effectively solves the problems of low positioning accuracy and large closure errors associated with traditional bearings, significantly improving the precision of bridge rotation and closure, and ensuring construction quality. At the same time, the conical friction pair works in conjunction with the spherical friction pair to rotate in tandem, avoiding eccentricity caused by excessive traction force, thus providing effective safety assurance for bridge rotation construction.

[0015] 2. This invention overcomes the shortcomings of traditional single-rotation-surface supports, which have a single rotation angle and limited adjustment range, by using a dual-rotation-surface structure of spherical and conical surfaces. It can achieve flexible rotation in all directions and can be adapted to construction scenarios of railways, highways, river crossings and various complex bridge rotations, greatly improving the adaptability of the support to different working conditions.

[0016] 3. This invention, through its multi-layered wear-resistant and drag-reducing, sealed protection, and upper and lower anchoring and limiting structure, not only reduces rotational friction loss and extends the service life of the support, but also prevents impurities from entering and limits the radial displacement of components, significantly improving the support's resistance to overturning and extreme working conditions, making rotation construction safer and more efficient. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention; Figure 2 for Figure 2 Enlarged view of point A in the image; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the rotation direction of the present invention.

[0018] The components include: 1. Middle seat plate; 2. Steering mechanism; 201. Rotating shaft; 202. First wear-resistant plate groove; 203. First sealing groove; 204. Boss; 205. Upper ball joint; 206. Support surface assembly; 2061. First groove; 2062. Rib plate; 207. Upper anchor bolt assembly; 2071. First sleeve; 2072. First anchor bolt; 208. Countersunk hole; 3. Support mechanism; 301. Spherical wear-resistant plate; 302. Conical wear-resistant plate; 303. Lower ball joint; 304. Basin ring; 305. Mounting assembly; 3051. Second sealing groove; 3052. Second wear-resistant plate groove; 306. Lower anchor bolt assembly; 3061. Second sleeve; 3062. Second anchor bolt; 307. Second groove. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3This invention provides a double-rotating surface swivel support with self-centering function, including a middle base plate 1. A steering mechanism 2 is fixedly connected to the top of the middle base plate 1, and a support mechanism 3 is slidably connected to the top of the middle base plate 1. The steering mechanism 2 includes a rotating shaft 201, the bottom end of which is fixedly connected to the top of the middle base plate 1. A first wear-resistant plate groove 202 and a first sealing groove 203 are formed on the inner wall of the middle base plate 1. A boss 204 is fixedly connected to the bottom of the middle base plate 1. An upper ball joint 205 is rotatably connected to the outer surface of the rotating shaft 201. A countersunk hole 208 is formed on the inner wall of the upper ball joint 205. A conical wear-resistant plate 302 is slidably connected to the bottom of the middle base plate 1. The inclined angle α of the conical rotating joint needs to meet the design principles mentioned in this patent. A support surface assembly 206 is formed on the inner wall of the upper ball joint 205, and an upper anchor rod assembly 207 is fixedly connected to the inner wall of the upper ball joint 205. Specifically, the middle seat plate 1 serves as the core load-bearing carrier, with the top connected to the steering mechanism 2 and the bottom connected to the support mechanism 3 for support. In the steering mechanism 2, the bottom end of the rotating shaft 201 is fixedly connected to the top of the middle seat plate 1, and its outer surface rotates in conjunction with the countersunk hole 208 on the inner wall of the upper ball joint 205 to achieve center positioning and rotation guidance, effectively preventing eccentricity during rotation. The first wear-resistant plate groove 202 on the inner wall of the middle seat plate 1 is used to install wear-resistant plates, reducing the frictional resistance of the rotating pair and improving the smoothness of rotation. The first sealing groove 203 is used to assemble sealing components, blocking dust and impurities from entering and protecting the rotating mating surfaces. The bottom boss 204 of the middle seat plate 1 is used for precise docking and centering of the lower components. The tapered wear-resistant plate 302, which is slidably connected at the bottom, forms a tapered rotating pair to achieve automatic correction and centering. The upper ball joint 205 serves as the upper load-bearing component, while the inner wall support surface assembly 206 forms the main rotating friction pair, stably bearing the vertical load and enabling omnidirectional rotation. The upper anchor bolt assembly 207 is used to anchor the bridge superstructure, ensuring a firm and reliable connection. The support mechanism 3 slides along the top of the middle seat plate 1, assisting in bearing and buffering the rotational impact force, and working in conjunction with the steering mechanism 2 to achieve smooth rotation and precise positioning of the support, providing both anti-overturning and self-centering foundation protection. The spherical rotating pair and the conical rotating pair cooperate to complete the rotation construction. The spherical rotating pair is coated with grease, and the spherical surface rotates first during the rotation construction. When unfavorable working conditions occur, the traction force increases, and the conical surface enters the working state to cooperate with the spherical surface to complete the rotation construction, ensuring the safety of the rotation construction and adding effective safety protection.

[0021] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 4The support mechanism 3 includes a spherical wear-resistant plate 301. The outer surface of the spherical wear-resistant plate 301 is slidably connected to the top of the middle seat plate 1. The bottom of the middle seat plate 1 is rotatably connected to a lower ball joint 303. The top of the lower ball joint 303 is fixedly connected to a basin ring 304. The inner wall of the lower ball joint 303 is provided with a second groove 307. The inner wall of the first sealing groove 203 is provided with an installation assembly 305. The inner wall of the lower ball joint 303 is fixedly connected to a lower anchor rod assembly 306. Specifically, the support mechanism 3 provides the support with double rotating surface support, wear resistance and drag reduction, and anchoring and limiting functions. The spherical wear-resistant plate 301 slides with the top of the middle seat plate 1 to form an upper rotating friction pair, reducing rotational friction loss. The lower ball joint 303 supports the middle seat plate 1, and the top basin ring 304 restricts the radial displacement of the middle seat plate 1, improving the anti-deviation capability. The second groove 307 opened on the inner wall is used for docking and positioning to ensure assembly accuracy. The installation component 305 in the first sealing groove 203 is used to assemble the sealing element and block impurities. The lower anchor rod component 306 realizes the firm anchoring of the lower ball joint 303 to the lower foundation, ensuring the overall stability of the support. During the rotation, the conical friction pair will limit the deviation of the central axis of the rotating device from the rotation axis due to gravity, thus giving it a self-centering function. At the same time, the bottom of the conical surface and the outer circle of the lower ball joint 303 are respectively provided with grooves and basin rings 304 to restrict the displacement of the middle seat plate 1 under the most unfavorable working conditions, ensuring smooth rotation.

[0022] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The support surface assembly 206 includes a first groove 2061, which is formed on the inner wall of the upper ball joint 205. Multiple ribs 2062 are fixedly connected to the inner wall of the first groove 2061. The upper anchor rod assembly 207 includes a first sleeve 2071, whose outer wall is fixedly connected to the inner wall of the upper ball joint 205. A first anchor rod 2072 is threadedly connected to the inner wall of the first sleeve 2071. The inner wall of the countersunk hole 208 is rotatably connected to the outer surface of the rotating shaft 201. The bottom of the upper ball joint 205 is rotatably connected to the bottom of the middle seat plate 1. The mounting assembly 305 includes a second sealing groove 3051, which is formed on the inner wall of the lower ball joint 303. A second wear-resistant plate groove 3052 is formed on the inner wall of the lower ball joint 303. Specifically, the support surface assembly 206, the upper anchor bolt assembly 207, and the installation assembly 305 work together to achieve structural reinforcement, anchoring connection, rotational positioning, and sealing and wear resistance functions of the support. The first groove 2061 of the support surface assembly 206 is formed in the inner wall of the upper ball joint 205. Multiple ribs 2062 fixed in the groove can effectively enhance the structural strength of the upper ball joint 205, distribute the upper load, and avoid local stress deformation. The first sleeve 2071 of the upper anchor bolt assembly 207 is fixed to the inner wall of the upper ball joint 205, and the first anchor bolt 2072 and... The first sleeve 2071 is threaded to achieve a firm anchorage between the upper ball joint 205 and the superstructure of the bridge, and to stably transmit the vertical bearing capacity. The countersunk hole 208 rotates with the rotating shaft 201 to achieve precise center positioning and prevent eccentric offset during the rotation process. The second sealing groove 3051 of the mounting component 305 is opened on the inner wall of the lower ball joint 303 to install seals to block dust and impurities. The second wear-resistant plate groove 3052 is used to assemble wear-resistant components, reduce the rotational friction of the two rotating surfaces, and improve the smoothness of the support rotation and its service life.

[0023] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The lower anchor bolt assembly 306 includes a second sleeve 3061, the outer wall of the second sleeve 3061 is fixedly connected to the inner wall of the lower ball joint 303, the inner wall of the second sleeve 3061 is threadedly connected to a second anchor bolt 3062, the inner surface of the basin ring 304 is rotatably connected to the outer surface of the middle seat plate 1, the inner wall of the second groove 307 is rotatably connected to the outer surface of the boss 204, the outer wall of the spherical wear-resistant plate 301 is rotatably connected to the inner wall of the first wear-resistant plate groove 202, and the outer wall of the conical wear-resistant plate 302 is rotatably connected to the inner wall of the second wear-resistant plate groove 3052. Specifically, the lower anchor bolt assembly 306 provides stable anchoring at the bottom of the support. Its second sleeve 3061 is fixed to the inner wall of the lower ball joint 303, and the second anchor bolt 3062 is threadedly connected to the second sleeve 3061, which can firmly install the lower ball joint 303 on the lower foundation of the bridge and transmit vertical loads. The inner surface of the basin ring 304 rotates with the outer surface of the middle seat plate 1 to limit the radial displacement of the middle seat plate 1 and improve the overturning resistance of the support. The second groove 307 rotates with the boss 204 to achieve precise centering of the middle seat plate 1 and the lower ball joint 303 and prevent eccentric rotation. The spherical wear-resistant plate 301 and the conical wear-resistant plate 302 rotate with the first wear-resistant plate groove 202 and the second wear-resistant plate groove 3052, respectively, to reduce the frictional resistance of the double rotating surfaces, ensure smooth rotation, and extend the service life of the components.

[0024] The calculation principle for the inclined plane angle α of the conical rotating friction pair is as follows: like Figure 4 As shown, when the upper structure is about to slide upwards on the inclined plane, the static friction force... It reaches its maximum value. According to the force equilibrium condition, it can be calculated that... The maximum value.

[0025] Let the inclination angle of the inclined plane be α, the mass of the superstructure be M, and the static friction coefficient be... Establish a coordinate system: the positive x-axis is along the inclined plane upwards, and the positive y-axis is perpendicular to the inclined plane upwards.

[0026] Forces are balanced along the y-direction:

[0027] Force equilibrium along the x-direction (critical state):

[0028] Substituting N and rearranging, we get:

[0029] From this, the maximum static friction force can be obtained. :

[0030] The horizontal force Fpull generated by the traction force is calculated from the maximum traction force Fpull of the continuous jack:

[0031] in: T – Rated tensile force of continuous jack; D – Diameter of the turntable; R – Projected diameter of the spherical wear-resistant plate; To ensure that the center seat plate does not lose its self-centering function due to excessive traction during rotation, the maximum static friction force is minimized. It needs to be greater than the horizontal force generated by the traction force. : ≥βF pull Where β is the safety factor, with a value of 1.5.

[0032] When adjusting the tilt angle α cannot meet the design requirements due to plate thickness limitations, the friction coefficient of the conical wear-resistant plate can be increased. The design principles must be met, wherein the inclined plane angle α of the conical revolute joint must meet the design principles mentioned in this patent.

[0033] Working principle: During operation, the bottom end of the rotating shaft 201 is fixedly connected to the middle seat plate 1, forming the basis for the rotation action. The outer wall of the rotating shaft 201 and the inner wall countersunk hole 208 of the upper ball joint 205 rotate and cooperate to achieve center positioning and rotation guidance, effectively suppressing the eccentric offset of the rotation. The first wear-resistant plate groove 202 on the inner wall of the middle seat plate 1 is equipped with wear-resistant plates to reduce the frictional resistance of the rotating pair. The first sealing groove 203 is equipped with sealing components to prevent dust and impurities from entering and to protect the rotating mating surface. The bottom boss 204 achieves precise docking and centering of the lower components. The upper ball joint 205 relies on the support surface assembly 206 to form the main rotating friction pair, stably bearing the vertical load and achieving omnidirectional rotation. The upper anchor rod assembly 207 firmly anchors the superstructure of the bridge, and the conical wear-resistant plate 302 forms a conical self-centering rotating pair. Under normal working conditions, the spherical rotating pair operates first. When encountering adverse working conditions or increased traction force, the conical rotating pair intervenes simultaneously. The two rotating surfaces work together to provide effective safety guarantee for the bridge rotation construction. During operation, the support mechanism 3 provides double-rotational surface support, wear-resistant drag reduction, and anchoring limitation for the support. The spherical wear-resistant plate 301 slides with the top of the middle seat plate 1, forming an upper rotational friction pair, effectively reducing rotational friction loss. At the same time, the lower ball joint 303 supports the middle seat plate 1, and its top basin ring 304 restricts the radial displacement of the middle seat plate 1, improving its anti-eccentricity capability. The second groove 307 on the inner wall achieves precise docking and positioning. The installation component 305 assembles a sealing element to block impurities, and the lower anchor rod component 306 firmly anchors the lower ball joint 303 to the lower foundation, ensuring the overall stability and reliability of the support.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-rotating-plane support with self-centering function, comprising a central support plate (1), characterized in that: The top of the middle seat plate (1) is fixedly connected to a steering mechanism (2), and the top of the middle seat plate (1) is slidably connected to a support mechanism (3). The steering mechanism (2) includes a rotating shaft (201), the bottom end of which is fixedly connected to the top of the middle seat plate (1). The inner wall of the middle seat plate (1) is provided with a first wear-resistant plate groove (202) and a first sealing groove (203). The bottom of the middle seat plate (1) is fixedly connected with a boss (204). The outer surface of the rotating shaft (201) is rotatably connected with an upper ball joint (205). The inner wall of the upper ball joint (205) is provided with a countersunk hole (208). The bottom of the middle seat plate (1) is slidably connected with a conical wear-resistant plate (302). The inclined angle α of the conical rotating pair must meet the design principles mentioned in this patent. The inner wall of the upper ball joint (205) is provided with a support surface assembly (206), and the inner wall of the upper ball joint (205) is fixedly connected with an upper anchor rod assembly (207).

2. A double-rotating-plane support with self-centering function according to claim 1, characterized in that: The support mechanism (3) includes a spherical wear-resistant plate (301), the outer surface of which is slidably connected to the top of the middle seat plate (1), the bottom of which is rotatably connected to a lower ball joint (303), the top of which is fixedly connected to a basin ring (304), the inner wall of which is provided with a second groove (307), the inner wall of which is provided with an installation component (305), and the inner wall of which is fixedly connected to a lower anchor rod component (306).

3. A double-rotating-plane support with self-centering function according to claim 1, characterized in that: The support surface assembly (206) includes a first groove (2061), which is formed on the inner wall of the upper ball joint (205). A plurality of ribs (2062) are fixedly connected to the inner wall of the first groove (2061).

4. A double-rotating-plane support with self-centering function according to claim 1, characterized in that: The upper anchor bolt assembly (207) includes a first sleeve (2071), the outer wall of the first sleeve (2071) is fixedly connected to the inner wall of the upper ball joint (205), and the inner wall of the first sleeve (2071) is threadedly connected to a first anchor bolt (2072).

5. A double-rotating-plane support with self-centering function according to claim 1, characterized in that: The inner wall of the countersunk hole (208) is rotatably connected to the outer surface of the rotating shaft (201), and the bottom of the upper ball joint (205) is rotatably connected to the bottom of the middle seat plate (1).

6. A double-rotating-plane support with self-centering function according to claim 2, characterized in that: The mounting assembly (305) includes a second sealing groove (3051), which is formed on the inner wall of the lower ball joint (303), and the inner wall of the lower ball joint (303) is provided with a second wear-resistant plate groove (3052).

7. A double-rotating-plane support with self-centering function according to claim 6, characterized in that: The lower anchor bolt assembly (306) includes a second sleeve (3061), the outer wall of the second sleeve (3061) is fixedly connected to the inner wall of the lower ball joint (303), and the inner wall of the second sleeve (3061) is threadedly connected to a second anchor bolt (3062).

8. A double-rotating-plane support with self-centering function according to claim 2, characterized in that: The inner surface of the basin ring (304) is rotatably connected to the outer surface of the middle seat plate (1), and the inner wall of the second groove (307) is rotatably connected to the outer surface of the boss (204).

9. A double-rotating-plane support with self-centering function according to claim 2, characterized in that: The outer wall of the spherical wear-resistant plate (301) is rotatably connected to the inner wall of the first wear-resistant plate groove (202), and the outer wall of the conical wear-resistant plate (302) is rotatably connected to the inner wall of the second wear-resistant plate groove (3052).

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