A self-sealing swivel ball joint bearing

Abstract

The present invention discloses a self-sealing swivel ball joint support, which relates to the technical field of bridge swivels, and includes an upper ball joint, a lower ball joint and a pin shaft. The bottom surface of the upper ball joint is a convex spherical surface, and the top surface of the lower ball joint is a concave spherical surface that matches the bottom surface of the upper ball joint. The centers of the upper ball joint and the lower ball joint are provided with through holes for the pin shaft to pass through, and the lower part of the pin shaft is fixedly connected to the lower ball joint. Embedding grooves are evenly provided on the concave spherical surface, and a slider is embedded in the embedding groove. According to the present invention, when the upper ball joint and the lower ball joint are assembled, the first sealing lip and the second sealing lip can touch each other, and a seal is formed between the outer sides of the upper ball joint and the lower ball joint to prevent impurities or concrete from entering between the upper ball joint and the lower ball joint, resulting in increased friction between the upper ball joint and the lower ball joint. In addition, when the upper ball joint fluctuates, the fold section of the second sealing lip can be deformed to avoid an increase in pressure between the first sealing lip and the second sealing lip, thereby increasing friction or causing damage to the first sealing lip and the second sealing lip.

Description

Technical Field

[0001] The invention relates to the technical field of bridge swivels, and in particular to a self-sealing swivel ball joint support. Background Art

[0002] The rotation technology mainly involves dividing the entire span of the bridge that crosses the river, highway or railway into two parts, and constructing them on both sides of the river or road respectively. After the superstructure of the bridge is basically completed, the two parts are combined into an integral bridge by rotating the beams on the main piers on both sides.

[0003] The widely used bridge swivel device currently includes a swivel ball joint support, a slide, a support leg and a temporary sand box. As the core component of the swivel structure, the swivel ball joint support bears the main weight of the swivel structure and acts as a central axis. It is unique and irreplaceable. Since the volume of the swivel ball joint support is generally large, the upper swivel part and the lower swivel part of the support must be cast together with the beam body and the pier respectively after the support is installed. The sealing effect of the support will affect the rotation accuracy and quality of the beam body. In addition, in the prior art, the slider set between the upper ball joint and the lower ball joint is mostly fixed by screws or limit structures. However, since there are a large number of sliders between the upper ball joint and the lower ball joint, if the slider is fixed by screws or limit structures, it will not only increase the labor intensity of the staff, but also affect the construction efficiency. Summary of the invention

[0004] The object of the present invention is to provide a self-sealing swivel ball joint support to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides a self-sealing swivel ball joint support, comprising an upper ball joint, a lower ball joint and a pin shaft, wherein the bottom surface of the upper ball joint is a convex spherical surface, the top surface of the lower ball joint is a concave spherical surface matching the bottom surface of the upper ball joint, a through hole for the pin shaft to pass through is provided at the center of the upper ball joint and the lower ball joint, and the lower part of the pin shaft is fixedly connected to the lower ball joint; it is characterized in that the concave spherical surface is evenly provided with embedded grooves, and a slider is embedded in the embedded groove;

[0007] The embedding groove is inclined from top to bottom in the depth direction toward the rotation direction of the upper ball joint, and the sliding block includes a clamping portion and a friction portion, and the clamping portion is adapted in the embedding groove;

[0008] A cavity is formed in the clamping part, and the friction part is in the shape of a boss, which has a sliding section vertically slidingly arranged in the cavity and an abutment section extending above the clamping part, butter is stored in the cavity below the sliding section, and through holes are evenly distributed on the friction part;

[0009] A sealing structure is also provided between the outer edges of the upper ball joint and the lower ball joint, and the sealing structure includes a first sealing lip fixed to the outer side of one end of the upper ball joint close to the lower ball joint, and a second sealing lip fixed to the outer side of one end of the lower ball joint close to the upper ball joint.

[0010] Furthermore, the sliding block is made of polytetrafluoroethylene material.

[0011] Furthermore, strip-shaped through grooves communicating with the through holes are evenly formed on the top of the friction portion, and the upper edges of the strip-shaped through grooves are chamfered.

[0012] Furthermore, the bottom of the first sealing lip has a first inclined surface inclined outwardly, the second sealing lip is annular as a whole, and includes a positioning section, a wavy fold section and an inclined section adapted to the first inclined surface, and the second sealing lip is made of metal sheet.

[0013] Furthermore, the self-sealing swivel ball joint support also includes a base, a sliding group, a mounting plate and a concrete layer, the base is pre-buried in the top of the cap beam, the sliding group is arranged at the top of the base, the sliding group includes two symmetrically arranged sliding blocks, and there is a gap on the opposite sides of the two sliding blocks. The top of the sliding block is provided with an inclined surface, and the inclined surfaces of the two sliding blocks form an inverted eight-shaped shape, and the sliding block is evenly penetrated with slots intersecting the inclined surfaces along its length direction, and the slots are adapted for sliding with plug rods, and both ends of the plug rods extend out of the slots, wherein the part of the plug rod extending from one end of the inclined surface is a limiting section, and a cross bar is connected to one end of the several plug rods away from the limiting section, the mounting plate is fixed at the top of the sliding group, and the mounting plate is close to the inclined surface and the plug rod, and the lower ball joint is arranged above the mounting plate and is cast by the concrete layer to form an integrated structure.

[0014] Furthermore, before the rotation, the ends of the limiting sections of the insertion rods on the two sliding blocks touch each other.

[0015] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0016] In the present invention, when the upper ball joint and the lower ball joint are assembled, the first sealing lip and the second sealing lip can touch each other, forming a seal with the outer sides of the upper ball joint and the lower ball joint to prevent impurities or concrete from entering between the upper ball joint and the lower ball joint, resulting in increased friction between the upper ball joint and the lower ball joint. In addition, when the upper ball joint fluctuates, the pleated section of the second sealing lip can be deformed to avoid an increase in pressure between the first sealing lip and the second sealing lip, thereby increasing friction or causing damage to the first sealing lip and the second sealing lip.

[0017] During the rotation construction of the present invention, the upper ball joint rotates and generates sliding friction with the slider. The sliding friction can generate a force that pushes the slider toward the inclined direction of the embedding groove, so that the slider is tightly attached to the bottom of the embedding groove to prevent the slider from sliding out of the embedding groove.

[0018] The present invention provides a sliding group, and after the bridge rotation is completed, the self-falling of the beam is achieved by relying on the deadweight of the structure, without affecting the normal use of the permanent support, and the beam-falling process is simple and controllable.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a schematic diagram of the split structure of the upper ball joint and the lower ball joint of the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the upper ball joint and the lower ball joint after being combined;

[0023] Figure 3 It is a schematic diagram of the structure of the slider of the present invention;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the slider of the present invention after installation;

[0025] Figure 5 yes Figure 2 Schematic diagram of the local structure at A;

[0026] Figure 6 It is a schematic diagram of the structure after the base, sliding group, mounting plate and concrete layer of the present invention are assembled;

[0027] Figure 7 It is a schematic diagram of the structure of the sliding group of the present invention;

[0028] Figure 8 It is a structural schematic diagram of another state of the sliding group of the present invention.

[0029] In the figure:

[0030] 1-upper ball joint; 11-convex spherical surface; 2-lower ball joint; 21-concave spherical surface; 22-embedded groove; 3-pin shaft; 4-slider; 41-clamping part; 411-cavity; 42-friction part; 421-sliding section; 422-contact section; 423-through hole; 424-strip through groove; 5-first sealing lip; 51-first inclined surface; 6-second sealing lip; 63-inclined section; 61-positioning section; 62-pleated section; 7-base; 8-sliding group; 81-sliding block; 811-inclined surface; 812-slot; 82-insertion rod; 9-mounting plate; 91-concrete layer. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] See also Figure 1-Figure 8 The present invention provides a self-sealing swivel ball joint support, including an upper ball joint 1, a lower ball joint 2 and a pin shaft 3. The bottom surface of the upper ball joint 1 is a convex spherical surface 11, and the top surface of the lower ball joint 2 is a concave spherical surface 21 matching the bottom surface of the upper ball joint 1. A through hole 423 for the pin shaft 3 to pass through is provided in the center of the upper ball joint 1 and the lower ball joint 2. The lower part of the pin shaft 3 is fixedly connected to the lower ball joint 2. This is a prior art and will not be described in detail.

[0033] In a specific embodiment of the present invention, embedding grooves 22 are evenly opened on the concave spherical surface 21, and a slider 4 is embedded in the embedding groove 22. The slider 4 contacts the convex spherical surface 11 of the upper ball joint 1 and carries the upper ball joint 1. During the rotation of the upper ball joint 1, the friction between the upper ball joint 1 and the lower ball joint 2 can be reduced.

[0034] Specifically, the slider 4 is made of polytetrafluoroethylene material.

[0035] In order to prevent the slider 4 from moving during the rotation construction process, conventional technology mostly uses screws or limiting structures to fix the slider 4 in the embedding groove 22. However, since there are a large number of sliders 4 arranged on the concave spherical surface 21, if screws or limiting structures are used to fix the slider 4, it will not only increase the labor intensity of the staff, but also affect the construction efficiency.

[0036] For this reason, in a specific embodiment of the present invention, the embedding groove 22 is tilted from top to bottom in the depth direction toward the rotation direction of the upper ball joint 1, and the slider 4 includes a clamping portion 41 and a friction portion 42, and the clamping portion 41 is adapted in the embedding groove 22. During the rotation construction, the upper ball joint 1 rotates and generates sliding friction with the slider 4, and the sliding friction can generate a force that pushes the slider 4 toward the tilting direction of the embedding groove 22, so that the slider 4 is tightly attached to the bottom of the embedding groove 22 to prevent the slider 4 from sliding out of the embedding groove 22.

[0037] Furthermore, a cavity 411 is formed in the clamping portion 41, and the friction portion 42 is in the shape of a boss, which has a sliding section 421 vertically slidingly arranged in the cavity 411 and an abutment portion extending to the top of the clamping portion 41. Butter is stored in the cavity 411 below the sliding section 421, and through holes 423 are evenly arranged on the friction portion 42. The slider 4 is a prefabricated block, and when in use, butter can be stored in its cavity 411. After the slider 4 is installed and the upper ball joint 1 is assembled with the lower ball joint 2, the upper ball joint 1 will compress the friction portion 42 to move it downward in the cavity 411 to squeeze the butter stored in the cavity 411, so that the butter is discharged from the through holes 423 to reduce the friction between the slider 4 and the upper ball joint 1.

[0038] In order to prevent impurities or concrete from entering between the upper ball joint 1 and the lower ball joint 2, which would increase the friction between the upper ball joint 1 and the lower ball joint 2 and affect the rotation construction, a sealing structure is also provided between the outer edges of the upper ball joint 1 and the lower ball joint 2, and the sealing structure includes a first sealing lip 5 fixed to the outer side of one end of the upper ball joint 1 close to the lower ball joint 2, and a second sealing lip 6 fixed to the outer side of one end of the lower ball joint 2 close to the upper ball joint 1.

[0039] When the upper ball joint 1 and the lower ball joint 2 are assembled, the first sealing lip 5 and the second sealing lip 6 can touch each other to form a seal with the outer sides of the upper ball joint 1 and the lower ball joint 2 to prevent impurities or concrete from entering between the upper ball joint 1 and the lower ball joint 2, thereby increasing the friction between the upper ball joint 1 and the lower ball joint 2.

[0040] Considering that the upper ball joint 1 and the slider 4 may rub against each other during the rotation construction, which may cause the slider 4 to be worn, and the particles of the worn slider 4 existing between the upper ball joint 1 and the slider 4 will increase the friction between the upper ball joint 1 and the slider 4, for this reason, the top of the friction part 42 is evenly provided with strip-shaped through grooves 424 connected to the through hole 423, and the upper edge of the strip-shaped through grooves 424 is chamfered. When the upper ball joint 1 rotates, the particles of the worn slider 4 can be brought into the strip-shaped through grooves 424.

[0041] Considering that the upper ball joint 1 may fluctuate during the rotation construction process, and the fluctuation of the upper ball joint 1 may increase the pressure between the first sealing lip 5 and the second sealing lip 6, thereby increasing the friction or causing the first sealing lip 5 and the second sealing lip 6 to be damaged, the bottom of the first sealing lip 5 has a first inclined surface 51 inclined outward, and the second sealing lip 6 is annular as a whole, including a positioning section 61, a wavy folded section 62 and an inclined section 63 adapted to the first inclined surface 51, and the second sealing lip 6 is made of a metal sheet. When the upper ball joint 1 fluctuates, the folded section 62 of the second sealing lip 6 may be deformed to avoid an increase in pressure between the first sealing lip 5 and the second sealing lip 6, thereby increasing the friction or causing the first sealing lip 5 and the second sealing lip 6 to be damaged.

[0042] In the prior art, the permanent support is separated from the upper structure before the rotation, and the upper structure needs to be connected to the permanent support after the rotation construction is completed. Therefore, after the rotation construction is completed, the beam dropping construction needs to be carried out to make the permanent support bear the load of the upper structure. At present, the jack beam dropping technology is widely used, but the construction risk of the jack beam dropping technology is large, the construction conditions are high, the investment cost is high, and the scope of application is limited. For this reason, in a specific embodiment of the present invention, the self-sealing swivel ball joint support also includes a base 7, a sliding group 8, a mounting plate 9 and a concrete layer 91. The base 7 is embedded in the top of the cap beam, and the sliding group 8 is arranged at the top of the base 7. The sliding group 8 includes two symmetrically arranged sliding blocks 81, and the two sliding blocks 81 have a gap on the opposite sides. The top of the sliding block 81 is provided with an inclined surface 811, and the two sliding blocks 81 have a gap. The inclined surface 811 forms an inverted figure eight shape, and the sliding block 81 is evenly penetrated along its length direction with slots 812 intersecting the inclined surface 811, and a plug rod 82 is slidably adapted in the slot 812, and both ends of the plug rod 82 extend out of the slot 812, wherein the portion of the plug rod 82 extending from one end of the inclined surface 811 is a limiting section, and a cross bar is connected to one end of the plurality of plug rods 82 away from the limiting section, and the mounting plate 9 is fixed on the top of the sliding group 8, and the mounting plate 9 is tightly attached to the inclined surface 811 and the plug rod 82, and the lower ball joint 2 is arranged above the mounting plate 9 and is cast by a concrete layer 91 to form an integrated structure. Based on the above design, before the rotation, the two sliding blocks 81 are in conflict with each other, and the rod 82 on the sliding block 81 can form an inverted eight-shaped supporting surface with its inclined surface 811. The inverted eight-shaped supporting surfaces of the two sliding blocks 81 respectively maintain sufficient axial rigidity through the mounting plate 9 at the bottom of the lower ball joint 2 and support the concrete layer 91. After the rotation, the jack is controlled to apply lateral prestress to the two sliding blocks 81 so that the weight of the upper ball joint 1 can act on the inclined surfaces 811 of the two sliding blocks 81. At this time, the rod 82 on the sliding block 81 is pulled out, and the sliding block 81 is gradually loosened by controlling the jack. Under the action of the deadweight of the bridge superstructure, the two sliding blocks 81 slide to the left and right sides along the base 7 respectively to complete the beam drop.

[0043] Furthermore, the ends of the limiting sections of the insert rods 82 on the two sliding blocks 81 are in contact with each other, and the insert rods 82 of the two sliding blocks 81 form a triangular support to provide a stable support.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-sealing swivel ball joint support, comprising an upper ball joint, a lower ball joint and a pin shaft, wherein the bottom surface of the upper ball joint is a convex spherical surface, the top surface of the lower ball joint is a concave spherical surface matching the bottom surface of the upper ball joint, a through hole for the pin shaft to pass through is provided at the center of the upper ball joint and the lower ball joint, and the lower part of the pin shaft is fixedly connected to the lower ball joint; It is characterized in that The concave spherical surface is evenly provided with embedding grooves, and the embedding grooves are embedded with sliders; The embedding groove is inclined from top to bottom in the depth direction toward the rotation direction of the upper ball joint, and the sliding block includes a clamping portion and a friction portion, and the clamping portion is adapted in the embedding groove; A cavity is formed in the clamping part, and the friction part is in the shape of a boss, which has a sliding section vertically slidingly arranged in the cavity and an abutment section extending above the clamping part, butter is stored in the cavity below the sliding section, and through holes are evenly distributed on the friction part; A sealing structure is also provided between the outer edges of the upper ball joint and the lower ball joint, and the sealing structure includes a first sealing lip fixed to the outer side of one end of the upper ball joint close to the lower ball joint, and a second sealing lip fixed to the outer side of one end of the lower ball joint close to the upper ball joint; The top of the friction part is evenly provided with strip-shaped through grooves communicating with the through hole, and the upper edge of the strip-shaped through groove is chamfered; The self-sealing swivel ball joint support also includes a base, a sliding group, a mounting plate and a concrete layer. The base is pre-buried in the top of the cap beam, and the sliding group is arranged at the top of the base. The sliding group includes two symmetrically arranged sliding blocks, and there is a gap on the opposite sides of the two sliding blocks. The top of the sliding block is provided with an inclined surface, and the inclined surfaces of the two sliding blocks form an inverted eight-shaped shape. The sliding block is evenly penetrated with slots intersecting the inclined surfaces along its length direction, and the slots are adapted for sliding with plug rods, and both ends of the plug rods extend out of the slots, wherein the part of the plug rod extending from one end of the inclined surface is a limiting section, and a cross bar is connected to one end of the plurality of plug rods away from the limiting section, the mounting plate is fixed on the top of the sliding group, and the mounting plate is tightly attached to the inclined surface and the plug rod, and the lower ball joint is arranged above the mounting plate and is cast by the concrete layer to form an integrated structure.

2. The self-sealing swivel ball joint support according to claim 1, It is characterized in that The sliding block is made of polytetrafluoroethylene material.

3. The self-sealing swivel ball joint support according to claim 1, It is characterized in that The bottom of the first sealing lip has a first inclined surface inclined outwardly, and the second sealing lip is annular as a whole, comprising a positioning section, a wavy fold section and an inclined section adapted to the first inclined surface, and the second sealing lip is made of metal foil.

4. The self-sealing swivel ball joint support according to claim 1, It is characterized in that Before the rotation, the ends of the limiting sections of the inserting rods on the two sliding blocks are in contact with each other.

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