Rotating support with exhaust function and its installation method

Abstract

The present invention belongs to a slewing bearing, in particular to a slewing bearing with an exhaust function and an installation method thereof. The slewing bearing with an exhaust function includes an upper spherical pendulum and a lower spherical pendulum that are longitudinally stacked and rotatably assembled through a spherical slide plate at the inner adjacent part. An anchoring member that can be connected to an adjacent beam body or a lower bearing platform is arranged on the outer sides of the upper spherical pendulum and the lower spherical pendulum. An exhaust passage is opened in the lower spherical pendulum and one end thereof is opened on the outer surface of the lower spherical pendulum, and the other end opening of the exhaust passage is communicated with the outside through the inner side or the periphery of the lower spherical pendulum. The present invention solves the problem in the prior art that when the bubble area at the adjacent part with concrete is large, it is not easy to effectively discharge the gas. It has the advantages of not easily generating bubble retention, the generated bubbles being easy to discharge, effectively avoiding bearing voids, and the slewing process being safe and reliable, etc.

Description

Technical Field

[0001] The present invention belongs to a rotating support, and particularly relates to a rotating support with an exhaust function and an installation method thereof. Background Art

[0002] With the increasing number of new bridge projects intersecting with existing highways, railways and rivers, due to the technical advantages of the rotating construction method such as high safety and little impact on traffic, the vast majority of new overpass bridges adopt the rotating construction method.

[0003] In the early stage, the rotating construction method was realized by using a rotating spherical hinge device. The rotating spherical hinge is a skeleton assembly structure, which needs to be installed on site, with high precision requirements, difficult to guarantee construction quality, long construction period and high cost. To solve the above problems, the rotating support has been popularized on a large scale.

[0004] The rotating support is an integral structure, without on-site assembly, easy to install, and is installed integrally by the grouting method. The upper and lower spherical pendulums of the rotating support adopt a spherical surface structure and serve as the core components for completing rotation, weighing and the central rotating shaft. In the rotating project, higher requirements are placed on the safety and reliability of the rotating support. Once the rotating structure of the rotating support fails, it will seriously affect the progress of the rotating project and cannot be remedied by measures.

[0005] Existing rotating supports have relatively large structural design defects and have therefore had problems in actual use. The diameter of the rotating support is usually large. When the rotating support is pressed on the concrete during the grouting construction, it is easy to cause air that cannot be discharged to remain inside the contact surface after the rotating support contacts the concrete; or when the rotating support cannot fall horizontally during the hoisting process, it is also easy to cause air to accumulate inside and cannot be discharged. The above situations cause the rotating support to be separated from the concrete, resulting in the deformation of the lower spherical pendulum under the action of the gravity of the upper beam body, causing the spherical surfaces of the upper and lower spherical pendulums to not effectively fit, and the spherical sliding plates between the upper and lower spherical pendulums to be crushed and fail, resulting in the failure of the rotation or other serious hazards due to the increase in the rotation force.

[0006] The invention patent application with the publication number CN111139748A discloses a bridge rotating support with a standby flat rotation function. A plurality of vibrating holes and a plurality of exhaust holes are provided on the embedded plate. Such a setting is beneficial to the exhaust of the concrete below the embedded plate and ensures the compactness of the bottom concrete when the embedded plate is installed. The above technical solution does not disclose the specific structure of the exhaust hole. Since the embedded plate and the rotating support body are detachably connected by bolts, when the area of the bubbles existing in the adjacent part of the concrete is large, it is not easy to effectively discharge the gas.

[0007] The applicant has not found a literature report similar to the present invention in the domestic patent database. Summary of the Invention

[0008] The object of the present invention is to provide a rotating support with an exhaust function and its installation method, effectively solving the structural design hidden dangers of the existing rotating support and meeting the effective progress of the rotating construction.

[0009] The overall technical concept of the present invention is:

[0010] The rotating support with an exhaust function includes an upper spherical pendulum and a lower spherical pendulum that are longitudinally stacked and rotationally assembled through a spherical slide plate at the inner adjacent part, and an anchoring member that can be connected to the adjacent beam body or the lower bearing platform is arranged on the outer sides of the upper spherical pendulum and the lower spherical pendulum; an exhaust channel is opened in the lower spherical pendulum and one end is opened on the outer surface of the lower spherical pendulum, and the other end opening of the exhaust channel communicates with the outside through the inner side or the periphery of the lower spherical pendulum.

[0011] The method for installing the rotating support with an exhaust function by the grouting method includes the following steps:

[0012] A. After the rotating support is assembled, the anchor rod is assembled with the rotating support;

[0013] B. When pouring the lower bearing platform, a reserved hole for installing the anchor rod is provided;

[0014] C. The rotating support is hoisted and placed in the reserved hole for installing the anchor rod of the lower bearing platform;

[0015] D. The rotating support is adjusted in height and angle by rotating the support nut until the rotating support is horizontally placed, so that the bottom surface of the rotating support is slightly higher than the upper surface of the lower bearing platform;

[0016] E. A template is set on the surface of the lower bearing platform around the rotating support, and mortar is poured into the reserved hole for installing the anchor rod by the grouting method;

[0017] F. During the process of pouring the mortar, the air at the bottom surface of the rotating support is discharged through the first channel, the third channel, and the second channel under pressure until the mortar fits with the lower surface of the rotating support;

[0018] G. After the mortar solidifies, the template is removed and the fastening nut is tightened.

[0019] The method for installing the rotating support with an exhaust function by the bedding mortar method includes the following steps:

[0020] a. The rotating support is hoisted and placed in the reserved hole for installing the anchor rod of the lower bearing platform;

[0021] b. The rotating support is adjusted in height and angle by rotating the support nut until the rotating support is horizontally placed, so that the bottom surface of the rotating support is slightly higher than the upper surface of the lower bearing platform;

[0022] c. A template is set on the surface of the lower bearing platform around the rotating support, and mortar is poured into the reserved hole for installing the anchor rod to form a first pouring layer;

[0023] d. The rotating support is removed and waited for the first pouring layer to solidify;

[0024] e. Pour mortar into the template enclosed space to form a secondary casting layer;

[0025] f. When the secondary casting layer is not yet solidified, install the slewing bearing by the grouting method. The air at the bottom surface of the slewing bearing is discharged through the first channel, the third channel, and the second channel under pressure until the mortar fits the lower surface of the slewing bearing, and then tighten the fastening nut.

[0026] The specific technical concept of the present invention includes:

[0027] For the convenience of setting the spherical slide plate, the preferred technical implementation means is that a groove for inlaying and fixing the spherical slide plate is provided inside the lower spherical pendulum.

[0028] For the convenience of manufacturing the exhaust channel in the lower spherical pendulum, and for the air bubbles to easily escape along the exhaust channel under pressure, in order to avoid the influence of air bubbles accumulated at the center of the lower spherical pendulum on the structure, a more preferred technical implementation means is that the exhaust channel includes a first channel that is arranged at intervals in the radial direction and penetrates through the inside and outside of the lower spherical pendulum axially; a second channel that is radially distributed on the inner side surface of the lower spherical pendulum and communicates with the upper end of the first channel, and the outer end of the second channel opens to the inner side or the periphery of the lower spherical pendulum outside the spherical slide plate.

[0029] To avoid the phenomenon that air bubbles are not easily discharged due to poor exhaust of individual first and second channels, the preferred technical implementation means is that there is also a third channel distributed on the inner side surface of the lower spherical pendulum, and the third channel connects the second channels to each other.

[0030] The main function of the third channel is to connect the second channels. For the convenience of realizing the above functions, the third channel includes but is not limited to adopting the following structure, and the third channel is distributed in a ring shape, an arc shape or a straight line shape on the inner side surface of the lower spherical pendulum.

[0031] To avoid the spherical slide plate from hindering gas discharge, the second channel and the third channel are located below the spherical slide plate.

[0032] The main functions of the anchoring member are, first, to form a stable connection relationship with the casting layer, and second, to form a stable support for the slewing bearing and to adjust its horizontal state. The preferred technical implementation means is that the anchoring member includes an anchoring bolt, a supporting nut and an anchoring nut adapted to it.

[0033] To make the laying of concrete more dense during the pouring process, a vibrating rod is used during the pouring processes of steps E, F, and G in the grouting method construction to achieve mortar densification. A vibrating rod is used during the pouring processes of steps c, e, and f in the construction installation by the grouting method to achieve mortar densification.

[0034] The applicant needs to explain:

[0035] In the description of the present invention, the orientation or positional relationship indicated by terms such as "inner side", "outer side", "outer end", "lower part", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. The terms "first", "second", "third" are only used for description and distinction, and should not be construed as implying importance.

[0036] The substantial features and remarkable technical progress of the present invention lie in:

[0037] 1. The present invention adopts the structural design of an exhaust channel, so that when there is a small amount of air at the adjacent part of the outer surface of the lower spherical pendulum and the concrete, it can also be discharged through the exhaust channel, ensuring that the rotating support is completely in close contact with the concrete without the problem of voids, and ensuring the safety and reliability of the rotation process.

[0038] 2. The present invention adopts the structural design of the second channels distributed radially and the third channel connecting the second channels, so that the first, second, and third channels are connected as a whole, effectively realizing the smooth discharge of the air retained at the adjacent part of the outer side of the lower spherical pendulum and the concrete.

[0039] 3. The present invention adopts the grouting method or the bedding mortar method for the installation and construction of the rotating support, skillfully combines the product structure with the existing process, has a reasonable construction process design, and a simple and easy construction method. It has been verified by the applicant's tests that the product in the present invention has a significantly reduced failure rate compared with the existing process on the premise of ensuring the construction quality, can effectively reduce the gas retention and avoid voids. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings of the present invention are as follows:

[0041] Figure 1 is the overall structural schematic diagram of the present invention.

[0042] Figure 2 is the schematic diagram of the exhaust channel layout in the lower spherical pendulum.

[0043] Figure 3 is Figure 2 the top view of

[0044] Figure 4 is the schematic diagram of step B when installing the rotating support by the grouting method.

[0045] Figure 5 is the schematic diagram of step C when installing the rotating support by the grouting method.

[0046] Figure 6 is the schematic diagram of step E when installing the rotating support by the grouting method.

[0047] Figure 7 It is a schematic diagram of step F when installing the rotating support by the grouting method.

[0048] Figure 8 It is a schematic diagram of step c when installing the rotating support by the mortar placing method.

[0049] Figure 9 It is a schematic diagram of step d when installing the rotating support by the mortar placing method.

[0050] Figure 10 It is a schematic diagram of step e when installing the rotating support by the mortar placing method.

[0051] Figure 11 It is a schematic diagram of step f when installing the rotating support by the mortar placing method.

[0052] The reference numerals in the drawings are as follows:

[0053] 1. Upper spherical pendulum; 2. Spherical slide plate; 3. Lower spherical pendulum; 4A. First channel; 4B. Second channel; 4C. Third channel; 5. Lower bearing platform; 6. Anchor rod; 7. Support nut; 8. Tightening nut; 9. Anchor rod installation hole; 10. Formwork; 11. First pouring layer; 12. Second pouring layer. Specific embodiments

[0054] The following further describes the embodiments of the present invention with reference to the drawings, but does not limit the present invention. Any equivalent technical means substitution made according to the specification shall not deviate from the protection scope of the present invention.

[0055] Embodiment 1

[0056] The overall structure of the rotating support in this embodiment is as Figure 1 , 2 shown. The rotating support with an exhaust function includes an upper spherical pendulum 1 and a lower spherical pendulum 3 that are longitudinally stacked and rotationally assembled through a spherical slide plate 2 at the inner adjacent position, and an anchoring member that can be connected to the adjacent beam body or lower bearing platform is arranged outside the upper spherical pendulum 1 and the lower spherical pendulum 3; an exhaust channel is opened in the lower spherical pendulum 3 and one end opens on the outer surface of the lower spherical pendulum 3, and the other end opening of the exhaust channel communicates with the outside through the inner side or the periphery of the lower spherical pendulum 3.

[0057] A groove for inlaying and fixing the spherical slide plate 2 is arranged inside the lower spherical pendulum 3.

[0058] The exhaust channel includes a first channel 4A that is arranged at intervals in the radial direction and penetrates through the inside and outside of the lower spherical pendulum 3 axially; a second channel 4B that is radially distributed on the inner side surface of the lower spherical pendulum 3 and communicates with the upper end of the first channel 4A, and the outer end opening of the second channel 4B opens on the inner side or the periphery of the lower spherical pendulum 3 outside the spherical slide plate 2.

[0059] It further includes a third channel 4C distributed on the inner side surface of the lower spherical pendulum 3, and the third channel 4C communicates with the second channels 4B with each other. The third channel 4C is annularly distributed on the inner side surface of the lower spherical pendulum 3. The second channels 4B and the third channel 4C are located below the spherical slide plate 2.

[0060] The anchoring support includes an anchor rod 6, a support nut 7 and a fastening nut 8 that are fitted to the anchor rod 6.

[0061] The installation steps of this embodiment are as Figures 4 - 7 shown. The method for installing a slewing bearing with an exhaust function by the grouting method includes the following steps:

[0062] A. After the slewing bearing is assembled, assemble the anchor rod 6 with the slewing bearing;

[0063] B. Reserve an anchor rod installation hole 9 when pouring the lower bearing platform 5;

[0064] C. Hoist the slewing bearing and place it in the anchor rod installation hole 9 of the lower bearing platform 5;

[0065] D. Rotate the support nut 7 to adjust the height and angle of the slewing bearing until the slewing bearing is horizontally placed, so that the bottom surface of the slewing bearing is slightly higher than the upper surface of the lower bearing platform 5;

[0066] E. Set a formwork 10 on the surface of the lower bearing platform 5 outside the periphery of the slewing bearing, and pour mortar into the anchor rod installation hole 9 by the grouting method;

[0067] F. The air at the bottom surface of the slewing bearing is discharged through the first channel 4A, the third channel 4C and the second channels 4B under pressure during the mortar pouring process until the mortar fits the lower surface of the slewing bearing;

[0068] G. After the mortar solidifies, remove the formwork 10 and tighten the fastening nut 8.

[0069] During the pouring process of steps E, F, and G, a vibrating rod is used to achieve the densification of the mortar.

[0070] Embodiment 2

[0071] The structure of the slewing bearing in this embodiment is the same as that in Embodiment 1, and the installation steps are as Figures 8 - 11 shown. The installation method includes the following steps:

[0072] a. Hoist the slewing bearing and place it in the anchor rod installation hole 9 of the lower bearing platform 5;

[0073] b. Rotate the support nut 7 to adjust the height and angle of the slewing bearing until the slewing bearing is horizontally placed, so that the bottom surface of the slewing bearing is slightly higher than the upper surface of the lower bearing platform 5;

[0074] c. Set a formwork 10 on the surface of the lower bearing platform 5 outside the periphery of the slewing bearing, and pour mortar into the anchor rod installation hole 9 to form a primary pouring layer 11;

[0075] d. Demolish the slewing bearing and wait for the first casting layer 11 to solidify.

[0076] e. Pour mortar into the enclosed space of the formwork 10 to form the second casting layer 12.

[0077] f. When the second casting layer 12 has not solidified, install the slewing bearing by the mortar bedding method. The air at the bottom surface of the slewing bearing is discharged through the first channel 4A, the third channel 4C, and the second channel 4B under pressure until the mortar fits the lower surface of the slewing bearing, and then tighten the fastening nut 8.

[0078] During the pouring processes of steps c, e, and f, a vibrating rod is used to achieve the compaction of the mortar.

[0079] To verify the effects of the embodiments of the present invention, the applicant conducted the following tests, and the test processes and results are as follows:

[0080] 1. Test site: The test site where the applicant is located.

[0081] 2. Test time: July 6, 2022.

[0082] 3. Participants: Zhao Jie, Gao Jianhua, Wang Fei, Guo Le.

[0083] 4. Test basis: Simulate the actual installation process of the slewing bearing, and then demolish the bearing to check the casting quality of the concrete-bearer joint surface.

[0084] 5. Equipment and instruments used: Vibrating rod, tape measure.

[0085] 6. Test steps:

[0086] 6-1. Pre-fabricate four lower bearing platforms with exactly the same size and reserve installation holes. At the same time, fabricate four slewing bearings with a diameter of 2 meters and exactly the same external dimensions, and two of them are fabricated according to the method and structure of this embodiment.

[0087] 6-2. Number the bearing platforms and bearings respectively. For No. 1, install a common slewing bearing by the grouting method; for No. 2, install a common bearing by the mortar bedding method; for No. 3, install the slewing bearing with an exhaust function according to the embodiment of the present invention by the grouting method; for No. 4, install the slewing bearing with an exhaust function of this embodiment by the mortar bedding method.

[0088] 6-3. According to the installation method described in the embodiment of the present invention, install the No. 1 and No. 3 bearings by the grouting method respectively, and install the No. 2 and No. 4 bearings by the mortar bedding method respectively.

[0089] 6-4. It is required that a dedicated person must be designated during the discharging, placing, and vibrating of the mortar, and no one is allowed to replace it casually, and it must be vibrated fully in strict accordance with the requirements of the operation instruction manual.

[0090] 6-5. After the mortar has solidified, remove the upper bearing and inspect the surface quality of the mortar poured on each numbered bearing platform.

[0091] 7. Test results:

[0092] When disassembling the bearing after the mortar has solidified, the bearing body needs to be struck. There will be no situation where the mortar quality at the outer circle position of the rotating bearing is not solidly poured. It will only be damaged due to striking. Therefore, no evaluation is made, and only the quality situation within a diameter of 1.5 meters is recorded. The specific results are shown in Table 1.

[0093] Table 1 Defect records of test results

[0094]

[0095]

[0096] The results show that there is an approximately 7-square-centimeter area of void at the center position of No. 1, and there are also other bubble holes around it; there are multiple 1-square-centimeter area bubble holes at the center position of No. 2; there are a small number of bubble holes with an area of less than 0.2 square centimeters at the position where the exhaust hole is not set in No. 3, meeting the quality requirements; no obvious bubble holes are found in No. 4.

[0097] In summary, after the applicant analyzed the measurement data, on the premise of the same construction quality, compared with the existing rotating bearing without an exhaust hole, the rotating bearing with an exhaust function in the embodiment of the present invention can effectively reduce the residual bubbles in the mortar and avoid voids under the two construction methods of the grouting method and the bedding mortar method.

Claims

1. Rotating body bearing with exhaust function, comprising a bearing body, an exhaust device, and an anchoring and supporting assembly. The bearing body includes an upper spherical pendulum (1) and a lower spherical pendulum (3). An anchoring and supporting assembly that can be connected to an adjacent beam body or lower bearing platform is arranged outside the upper spherical pendulum (1) and the lower spherical pendulum (3); it is characterized in that The exhaust passage is provided in the lower spherical pendulum (3) and one end thereof opens to the outer surface of the lower spherical pendulum (3). The other end of the exhaust passage communicates with the outside through the inner side or the periphery of the lower spherical pendulum (3). The exhaust passage includes a first passage (4A) that is arranged at intervals in the radial direction and penetrates through the inside and outside of the lower spherical pendulum (3) axially; a second passage (4B) that is radially distributed on the inner side surface of the lower spherical pendulum (3) and communicates with the upper end of the first passage (4A), and the outer end of the second passage (4B) opens to the inner side or the periphery of the lower spherical pendulum (3) outside the spherical sliding plate (2); and a third passage (4C) that is distributed on the inner side surface of the lower spherical pendulum (3), and the third passage (4C) connects the second passages (4B) to each other. The third passage (4C) is distributed in a ring shape, an arc shape or a straight line shape on the inner side surface of the lower spherical pendulum (3). The anchoring and supporting assembly includes an anchor rod (6), a supporting nut (7) and a fastening nut (8) that are fitted with the anchor rod (6).

2. The swivel bearing with an exhaust function according to claim 1, characterized in that A groove for inlaying and fixing the spherical sliding plate (2) is provided on the inner side of the lower spherical pendulum (3).

3. The swivel bearing with exhaust function according to claim 1, characterized in that The second passage (4B) and the third passage (4C) are located below the spherical sliding plate (2).

4. A method for installing a rotating support with an exhaust function as described in any one of claims 1-3 by means of grouting, characterized in that It includes the following steps: A. After the rotating body bearing is assembled, the anchor rod (6) is assembled with the rotating body bearing; B. When the lower bearing platform (5) is poured, an anchor rod installation hole (9) is reserved; C. Hoist the rotating body bearing and place it into the anchor rod installation hole (9) of the lower bearing platform (5); D. Rotate the supporting nut (7) to adjust the height and angle of the rotating body bearing until the rotating body bearing is horizontally placed, so that the bottom surface of the rotating body bearing is slightly higher than the upper surface of the lower bearing platform (5); E. Set a formwork (10) on the surface of the lower bearing platform (5) outside the rotating body bearing, and pour mortar into the anchor rod installation hole (9) by the grouting method; F. During the process of pouring the mortar, the air on the bottom surface of the rotating body bearing is discharged through the first passage (4A), the third passage (4C) and the second passage (4B) under pressure until the mortar fits with the lower surface of the rotating body bearing; G. After the mortar solidifies, remove the formwork (10) and tighten the fastening nut (8).

5. The method for installing a slewing bearing with exhaust function by grouting method according to claim 4, characterized in that During the pouring process of steps E, F, and G, a vibrating rod is used to make the mortar dense.

6. A method for installing a rotating support with an exhaust function as described in any one of claims 1-3 by the method of grouting under the support, characterized in that It includes the following steps: a. Hoist the rotating body bearing and place it into the anchor rod installation hole (9) of the lower bearing platform (5); b. Rotate the supporting nut (7) to adjust the height and angle of the rotating body bearing until the rotating body bearing is horizontally placed, so that the bottom surface of the rotating body bearing is slightly higher than the upper surface of the lower bearing platform (5); c. Set a formwork (10) on the surface of the lower bearing platform (5) outside the rotating body bearing, and pour mortar into the anchor rod installation hole (9) to form a primary pouring layer (11); d. Remove the rotating body bearing and wait for the primary pouring layer (11) to solidify; e. Pour mortar into the closed space of the formwork (10) to form a secondary pouring layer (12); f. When the secondary pouring layer (12) is not solidified, install the rotating body bearing by the grouting method. The air on the bottom surface of the rotating body bearing is discharged through the first passage (4A), the third passage (4C) and the second passage (4B) under pressure until the mortar fits with the lower surface of the rotating body bearing, and tighten the fastening nut (8).

7. The method for installing a rotating support with an exhaust function by the grouting method according to claim 6, characterized in that During the pouring process of steps c, e, and f, a vibrating rod is used to make the mortar dense.

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