Thread filling height-adjusting support

Abstract

The utility model relates to a thread filling height adjusting support, and belongs to the technical field of bridge supports. The device is mainly composed of a thread height-adjusting structure and a filling height-adjusting structure. The thread height adjusting structure is mainly composed of a spherical stud, a height adjusting nut and a lower support plate with threads. The spherical stud and the lower support plate with the threads are assembled in the height adjusting nut at the same time through the upper threads and the lower threads respectively. A right-hand thread is arranged at the upper part of an inner cavity of the height adjusting nut; a left-hand thread is arranged downwards from the tool withdrawal groove; the upper part of the spherical stud is provided with a spherical groove of the spherical revolute pair, and the lower part of the spherical stud is provided with a right-hand thread screwed with the height adjusting nut; left-hand threads are arranged on the upper portion of the lower support plate and assembled with the height adjusting nut in a screwed mode. The filling height-adjusting structure comprises a filling channel which is arranged in the center position of a tool withdrawal groove of an inner cavity of the height-adjusting nut or on the spherical stud or the lower support plate; a closed inner cavity is formed by the height adjusting nut, the spherical stud and the lower support plate; the filling channel is communicated with the closed inner cavity, and the closed inner cavity is filled with a high polymer material.

Description

Technical Field

[0001] This utility model relates to a bridge bearing, and more particularly to a threaded filler height adjustment bearing, belonging to the technical field of bridge bearings. Background Technology

[0002] In recent years, with the rapid development of high-speed rail and highway engineering both domestically and internationally, bridge construction has also progressed rapidly. Some bridge projects, due to site selection constraints, are built in areas prone to geological subsidence, posing a greater challenge to their durability. Foundation settlement can easily lead to double or triple support points, causing uneven stress on the pier structures, resulting in an unstable bridge system and even secondary disasters affecting bridge operation. To effectively control the damage caused by foundation settlement in bridge engineering, researchers have focused on in-depth research into new technologies for prevention, primarily from the perspective of compensating for foundation settlement. Bridge bearings are the core and critical components connecting the bridge beams and piers; if bridge bearings can compensate for this settlement, the stability and durability of the bridge system can be significantly improved.

[0003] In bridge engineering, bridge bearings, which connect the beams and piers, undergo compressive deformation during actual operation under external loads such as the beam's own weight, vehicle live loads, and wind loads. The amount of compressive deformation at each bearing point is usually not completely uniform, easily leading to uneven stress on the bearings at different points, which in turn affects the stability of the bridge system. In such cases, if the bearings have the function of fine-tuning their height, this uneven stress caused by vertical compressive deformation can be effectively corrected.

[0004] During bridge maintenance, when serious damage to bridge bearings severely affects the normal operation of the bridge system and the bearings no longer meet the requirements, they are usually replaced. However, during bearing replacement, uneven stress distribution at different support points can easily occur due to factors such as deviations in construction precision or manufacturing errors. To effectively address this uneven stress distribution during bearing replacement, the bearing height can be finely adjusted.

[0005] In addition, common bridge height adjustment bearings have the following problems:

[0006] 1. Adjusting the height of the support by inserting steel shims: This method achieves the function of adjusting the height of the support by inserting steel shims between the bottom of the beam and the support or between the top of the pier and the support. This method of adjustment requires the support to be in the case of the beam being supported. It is not easy to achieve stepless adjustment. The construction cost of adjusting the height is high, and traffic must be blocked before the adjustment can be carried out.

[0007] 2. The height-adjustable bearing has an internal filling cavity. Liquid materials such as dimethyl silicone oil are injected under high pressure to adjust the bearing's height. After the bearing is adjusted to the predetermined height, temporary supports are placed near it, transferring the beam load from the bearing to the temporary supports. At this point, the oil is unloaded from the bearing. A steel shim is then inserted between the bearing and the bottom of the beam to complete the height adjustment. This type of bearing merely replaces the function of a jack and does not achieve a substantial height adjustment, thus it has not been widely adopted or used.

[0008] 3. Threaded height adjustment support: The height of the support is adjusted by rotating the thread. This type of support has the following disadvantages: it is bulky; the thread is prone to loosening and is unstable under vertical loads; the thread is prone to local stress, which affects its service life; and the threaded height adjustment is difficult to install.

[0009] In conclusion, it is necessary to research a new type of support that can achieve height adjustment. Utility Model Content

[0010] In view of the above-mentioned defects in the existing technology, this utility model proposes a threaded filling height adjustment bearing to solve the problems of bridge system safety and durability caused by geological settlement, as well as the problems of incomplete bearing height adjustment function and large bearing size.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0012] The threaded filler height adjustment support is mainly composed of two major components: a threaded height adjustment structure and a filler height adjustment structure.

[0013] The threaded height adjustment structure mainly consists of a spherical stud, a height adjustment nut, and a threaded lower support plate. The spherical stud and the threaded lower support plate are simultaneously assembled into the height adjustment nut via upper and lower threads, respectively. The upper part of the inner cavity of the height adjustment nut has a right-hand thread, and the self-retracting groove has a left-hand thread. The upper part of the spherical stud has a spherical groove for a spherical rotating pair, and the lower part has a right-hand thread that engages with the height adjustment nut. The upper part of the lower support plate has a left-hand thread for engagement with the height adjustment nut.

[0014] The height adjustment structure includes a filling channel located at the center of the relief groove in the inner cavity of the height adjustment nut, or on the spherical stud or the lower support plate; the height adjustment nut, the spherical stud and the lower support plate form a sealed inner cavity; the filling channel communicates with the sealed inner cavity, and the sealed inner cavity is filled with a polymer material.

[0015] Furthermore, an upper support plate is provided at the top of the spherical stud.

[0016] Furthermore, the spherical revolute joint is disposed between the upper support plate and the spherical groove of the spherical stud.

[0017] Furthermore, the spherical revolute joint includes a spherical crown liner, a flat sliding plate, and a spherical sliding plate.

[0018] Furthermore, the upper surface of the spherical crown liner is provided with a planar groove for placing a planar sliding plate, and the lower surface of the spherical crown liner is provided with a spherical sliding plate, which is placed in the spherical groove.

[0019] Furthermore, the bottom flange connecting the height adjustment nut and the lower support plate is provided with a set connection through hole and a process screw hole for the height adjustment handle.

[0020] Furthermore, a high-pressure injection device is connected to the outside of the filling channel.

[0021] Furthermore, the polymer material is a rapidly solidifying and high-pressure resistant polymer material.

[0022] By adopting the above technical solution, this utility model has at least one of the following beneficial effects compared with the prior art:

[0023] The main innovation of this utility model support is reflected in:

[0024] Functionally, it can achieve stepless height adjustment; it can achieve both threaded height adjustment and filler height adjustment, combining the two methods; threaded height adjustment followed by filler height adjustment can replace the lifting function of a jack; it can avoid vertical load on the thread, ensuring stable and balanced force; it locks after height adjustment, and the filler material is simultaneously filled to the threaded mating area, ensuring stable and safe locking; there is no need to customize a steel shim plate.

[0025] Structurally: The height-adjusting nut has right-hand and left-hand threads inside. The right-hand thread engages with the spherical stud, and the left-hand thread engages with the lower support plate. Rotating the height-adjusting nut lifts the spherical stud upwards, thereby adjusting the height of the support and its beam. The design of left-hand and right-hand threads is the core technology of thread height adjustment. The filling structure is located in the relief groove of the height-adjusting nut or on the lower support plate, and the processing technology for the filling structure is mature.

[0026] This utility model of a threaded filler height-adjustable bearing fills several technological gaps in the industry, solving the problems of bridge system safety and durability caused by geological settlement, the incomplete height adjustment function of bearings, and the large size of bearings. It not only meets the needs of actual working conditions but also effectively controls the manufacturing cost of the bearing and improves the durability of both the bearing and the bridge. To a certain extent, it enhances the product's competitiveness and promotes its wider application. Attached Figure Description

[0027] Figure 1 This is a sectional view of the threaded filling height adjustment support of this utility model;

[0028] Figure 2 This is a schematic diagram of the upper support plate of the threaded filling height adjustment support of this utility model;

[0029] Figure 3 This is a schematic diagram of the spherical stud of the threaded filling height adjustment support of this utility model;

[0030] Figure 4 This is a schematic diagram of the threaded filling height adjustment support and height adjustment nut of this utility model;

[0031] Figure 5 This is a schematic diagram of the lower support plate of the threaded filling height adjustment support of this utility model. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described in detail below to facilitate a clear understanding of the present invention, but these descriptions do not constitute a limitation thereof.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" 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.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example 1

[0036] As attached Figure 1-5As shown in this embodiment, a threaded height-adjusting support is mainly composed of two major components: a threaded height-adjusting structure and a filling height-adjusting structure. The threaded height-adjusting structure mainly consists of a spherical stud 1, a height-adjusting nut 2, and a threaded lower support plate 3. The spherical stud 1 and the threaded lower support plate 3 are simultaneously assembled into the height-adjusting nut 2 via upper and lower threads, respectively. The upper part of the inner cavity of the height-adjusting nut 2 is provided with a right-hand thread, and the self-retracting groove is provided with a left-hand thread. The upper part of the spherical stud 1 is provided with a spherical groove 11 for a spherical rotating pair, and the lower part is provided with a right-hand thread that engages with the height-adjusting nut 2. The upper part of the lower support plate 3 is provided with a left-hand thread, which engages with the height-adjusting nut 2. When the support needs to be adjusted in height, the height-adjusting nut 2 is rotated. The height-adjusting nut 2 rotates upward along the right-hand thread of the lower support plate 3, and the left-hand thread drives the spherical stud 1 to rotate upward, thus achieving height adjustment.

[0037] The height adjustment structure includes a filling channel 21 located at the center of the relief groove within the inner cavity of the height adjustment nut 2. The height adjustment nut 2, spherical stud 1, and lower support plate 3 form a sealed inner cavity 22. The filling channel 21 communicates with the sealed inner cavity 22, which is filled with a rapidly setting, high-pressure resistant polymer material. A high-pressure injection device is externally connected to the filling channel 21. Through this device, the rapidly setting, high-pressure resistant polymer material is injected along the filling channel into the sealed inner cavity 22 formed by the height adjustment nut 2, spherical stud 1, and lower support plate 3. After rapid setting, the polymer material achieves high pressure resistance and can withstand the upper load.

[0038] Furthermore, in this embodiment, an upper support plate 4 is provided on the top of the spherical stud 1. A spherical revolute joint is provided between the upper support plate 4 and the spherical groove 11 of the spherical stud 1. The spherical revolute joint includes a spherical crown liner 5, a flat sliding plate 6, and a spherical sliding plate 7. The upper surface of the spherical crown liner 5 is provided with a flat groove for placing the flat sliding plate 6, and the lower surface of the spherical crown liner 5 is provided with a spherical sliding plate 7, which is placed in the spherical groove 11.

[0039] In this embodiment, the bottom flange on which the height adjustment nut 2 connects to the lower support plate 3 is provided with a locking connection through hole 23 and a height adjustment handle process screw hole 24.

[0040] When this new type of height-adjustable bearing bears vertical loads, the load is transferred to the lower bearing plate 3 through the filling of high-pressure-resistant polymer material; the threaded area does not bear pressure. This type of bearing has significant advantages when used in the renovation of old bridges for bearing replacement. The threaded fine-tuning compensates for the vertical compressive deformation of the bearing at each support point, ensuring balanced stress distribution across all bridge supports. The threaded area of ​​the bearing only bears vertical loads for a short time. After filling with polymer material, the main load-bearing component shifts from the threaded area to the polymer material, which then transfers the load to the lower bearing plate foundation.

[0041] Example 2

[0042] In this embodiment, the filling channel 21 is disposed on the spherical stud 1 (not shown in the figure), and other structures and connection methods are the same as in Embodiment 1, which will not be described in detail here.

[0043] Example 3

[0044] In this embodiment, the filling channel 21 is disposed on the lower support plate 3 (not shown in the figure), and other structures and connection methods are the same as in Embodiment 1, which will not be described in detail here.

[0045] The above are merely preferred embodiments of this utility model and do not constitute any limitation on the structure of this utility model. The arrangement and quantity of this utility model are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of this utility model, without departing from the scope of the technical solution of this utility model, are still within the scope of the technical solution of this utility model.

Claims

1. A threaded filler height adjustment support, characterized in that: The threaded filling height adjustment support is mainly composed of two major components: the threaded height adjustment structure and the filling height adjustment structure. The threaded height adjustment structure mainly consists of a spherical stud (1), a height adjustment nut (2), and a threaded lower support plate (3); the spherical stud (1) and the threaded lower support plate (3) are respectively threaded into the height adjustment nut (2); the upper part of the inner cavity of the height adjustment nut (2) is provided with a right-hand thread, and the self-retracting groove is provided with a left-hand thread downward; the upper part of the spherical stud (1) is provided with a spherical groove (11) of the spherical rotating pair, and the lower part is provided with a right-hand thread that engages with the height adjustment nut (2); the upper part of the lower support plate (3) is provided with a left-hand thread, which engages with the height adjustment nut (2); The height adjustment structure includes a filling channel (21) located at the center of the relief groove in the inner cavity of the height adjustment nut (2), on the spherical stud (1), or on the lower support plate (3); the height adjustment nut (2), the spherical stud (1), and the lower support plate (3) form a closed inner cavity (22); the filling channel (21) communicates with the closed inner cavity (22), and the closed inner cavity (22) is filled with polymer material.

2. The threaded filling height adjustment support according to claim 1, characterized in that: The top of the spherical stud (1) is provided with an upper support plate (4).

3. The threaded filling height adjustment support according to claim 2, characterized in that: The spherical revolute joint is disposed between the upper support plate (4) and the spherical groove (11) of the spherical stud (1).

4. The threaded filling height adjustment support according to claim 1, characterized in that: The spherical revolute joint includes a spherical crown liner (5), a flat sliding plate (6), and a spherical sliding plate (7).

5. The threaded filling height adjustment support according to claim 4, characterized in that: The upper surface of the spherical crown liner (5) is provided with a planar groove for placing a planar sliding plate (6), and the lower surface of the spherical crown liner (5) is provided with a spherical sliding plate (7), which is placed in the spherical groove (11).

6. The threaded filling height adjustment support according to claim 1, characterized in that: The bottom flange on which the height adjustment nut (2) connects to the lower support plate (3) is provided with a locking connection through hole (23) and a height adjustment handle process screw hole (24).

7. The threaded filling height adjustment support according to claim 1, characterized in that: The filling channel (21) is externally connected to a high-pressure injection device.

8. The threaded filling height adjustment support according to claim 7, characterized in that: The polymer material is a rapidly solidifying and high-pressure resistant polymer material.

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