Corrosion-resistant closed waterproof support

Abstract

The invention belongs to the technical field of bridge supports, and particularly relates to a corrosion-resistant closed waterproof support which is particularly suitable for the working conditions of periodic water soaking and seawater sputtering corrosion. The waterproof support comprises a support body and a surrounding plate surrounding the support body, the upper side and the lower side of the surrounding plate are connected with the outer side of an upper support plate and the outer side of a lower support plate of the support body in a sealed mode respectively, so that a sealed cavity is formed in the support body, and the upper support plate and / or the lower support plate are / is provided with at least two through holes communicated with the sealed cavity. At least one through hole is connected with the oil conveying pipe and is used for injecting anti-rust grease into the sealing cavity; at least one through hole is provided with a valve for controlling exhaust; the waterproof support has the advantages of being excellent in waterproof and corrosion-resistant performance, low in manufacturing and maintenance cost, convenient to disassemble and assemble and controllable and stable in quality.

Description

Technical Field

[0001] This invention belongs to the field of bridge bearing technology, specifically relating to a corrosion-resistant, sealed, and waterproof bearing, which is particularly suitable for periodic water immersion and seawater splash corrosion conditions. Background Technology

[0002] In recent years, my country's road transportation industry has developed rapidly. Bridge bearings, as a very important force-transmitting component in bridge structures, have been widely used in various urban bridges and rail transit systems. With the increasing number of coastal bridges, the requirements for waterproof and corrosion-resistant bridge bearings are becoming more and more urgent.

[0003] During the flood season, many urban bridges are level with the water surface, and the bridge supports are often submerged in water. Some coastal bridges are also usually not designed to be too high for the sake of urban landscape. The supports located above the piers are extremely susceptible to damage from seawater immersion, splashing corrosion, and other forms of damage.

[0004] Traditional bridge bearings lack waterproofing properties; neither their main materials nor friction components can withstand the erosion of urban sewage and seawater. If subjected to these conditions for an extended period, the lifespan of the bridge bearings will drastically decrease, consequently affecting the safe use of the bridge structure.

[0005] In the existing technology, for bridge bearings in flooded areas and areas affected by seawater splash, heavy anti-corrosion treatment is generally used in China. However, due to the complex and varied shapes of the bearings, the surface coating will corrode after 2 to 5 years, resulting in unsatisfactory protection and high maintenance costs in the later stages.

[0006] Some supports improve waterproofing by using rubber sealing rings or polyurethane sealing layers, but these methods have drawbacks such as being unable to withstand periodic water immersion, having complex installation procedures, being difficult to control installation quality, and being prone to failure of the waterproofing structure, resulting in unsatisfactory waterproofing effects.

[0007] The invention disclosed in application number CN202210179895.4 is a waterproof device for bridge bearings. Its upper plate is embedded in the beam and sealed to the upper part of a waterproof cover. The lower part of the waterproof cover is connected to an elastic displacement device, which is connected to a lower plate. The lower plate is embedded in the side of the pier. The elastic displacement device is not sealed to the waterproof cover and the lower plate. The beam, upper plate, waterproof cover, lower plate, and pier together form a semi-enclosed space for the bearing. It utilizes the internal air pressure of the waterproof device to resist rising water levels, creating a water level difference between the inside and outside of the device, preventing water from corroding the bearing and thus protecting it. This effectively improves the bearing's corrosion resistance and extends its service life. However, this device has many structural components, complex connections, and high manufacturing costs, making it uneconomical. Furthermore, in actual use, when bridge bearings slip, rotate, or experience vibration damping and swaying, the waterproof device exhibits poor stability and is not safe or durable. Summary of the Invention

[0008] The purpose of this invention is to provide a new type of waterproof support with excellent waterproof and corrosion resistance, low manufacturing and maintenance costs, convenient disassembly and assembly, and controllable and stable quality, which is particularly suitable for periodic water immersion and seawater splash corrosion conditions.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A corrosion-resistant, sealed, and waterproof bearing, characterized in that: it includes a bearing body and a surrounding plate enclosing the bearing body; the upper and lower sides of the surrounding plate are respectively sealed to the outer sides of the upper and lower bearing plates of the bearing body, forming a sealed cavity inside the bearing body; the upper and / or lower bearing plates are provided with at least two through holes communicating with the sealed cavity; at least one of the through holes is connected to an oil supply pipe for injecting rust-preventive grease into the sealed cavity; at least one of the through holes is provided with a valve for controlling venting.

[0010] The additional technical features constituting the above-mentioned corrosion-resistant, sealed, and waterproof support also include: —The outer surfaces of the upper and lower support plates are both covered with a rubber anti-corrosion layer, which is connected to the upper and lower support plates by bonding or vulcanization. —The upper support plate and the lower support are both provided with the through hole, the through hole is connected to the oil supply pipe, and the oil supply pipe is provided with the valve, the valve is a one-way valve or a ball valve; —The enclosure is an elastic sheet. The upper and lower edges of the enclosure are respectively connected to the outer walls of the upper support plate and the lower support plate by a number of bolts. At the sealed connection, an oil-resistant rubber gasket is provided on the inner side of the enclosure, and a stainless steel pressure strip is provided on the outer side of the enclosure. The bolts pass through the stainless steel washer, the stainless steel pressure strip, the enclosure, and the oil-resistant rubber gasket in sequence and are tightened to the threaded holes on the outer walls of the upper support plate or the lower support plate. —The inner side of the oil-resistant rubber pad is provided with several protruding ridges, which correspond to the grooves provided on the outer side wall of the upper support plate or the lower support plate; —The support body includes a middle support body disposed between the upper support plate and the lower support plate, wherein the middle support body is a rubber bearing body or a friction pendulum; —The friction pendulum is a hyperboloid spherical cap bushing, which mates with the spherical grooves of the upper and lower support plates to form a spherical friction pair; or the friction pendulum is a single-curved spherical cap bushing. A spherical friction pair is provided on one side of its spherical curved surface, and a planar friction pair is provided on one side of its flat surface. —The upper support plate is provided with an upper anchor bolt assembly on its upper surface, which is connected to the bridge beam; the lower support plate is provided with a lower anchor bolt assembly on its lower surface, which is connected to the bridge pier.

[0011] Compared with existing technologies, the corrosion-resistant, sealed, and waterproof bearing provided by this invention has the following advantages: The bearing body is surrounded by a sealing plate, forming a sealed cavity between the upper and lower bearing plates. This prevents water, mud, or contaminants from entering the internal structure of the bearing, maintaining its corrosion resistance for a long time and avoiding the problem of internal corrosion caused by water immersion in bridge bearings. Simultaneously, the upper and / or lower bearing plates are provided with at least two through holes communicating with the sealed cavity; at least one through hole is connected to an oil supply pipe for injecting anti-rust grease into the sealed cavity; and at least one through hole is equipped with a valve. Used for controlling venting, the bridge bearing body is in a sealed environment, and the main components are isolated and protected by anti-rust grease. On the one hand, the anti-rust grease wets the steel components inside the bearing to prevent them from rusting. On the other hand, the sealed cavity filled with anti-rust grease can also provide sufficient pressure to resist and balance the pressure of external water pressure on the sealing components under periodic water immersion and seawater splash conditions, so that the internal and external pressure tend to be balanced, effectively reducing the possibility of external water and dirt intruding into the internal structure of the bearing, greatly improving the service life of the bearing under the above conditions. It has the advantages of simple and compact structure, convenient use and maintenance, safety, economy and durability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a corrosion-resistant, sealed, and waterproof support according to the present invention; Figure 2 This is a schematic diagram of the bolt sealing connection of the waterproof support plate. Figure 1 Part a). Detailed Implementation

[0013] The structure and working principle of the novel corrosion-resistant, sealed, and waterproof support provided by this invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0014] In the description of this invention, unless otherwise stated, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0015] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" 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 invention based on the specific circumstances.

[0016] like Figure 1 As shown, the structure of this novel corrosion-resistant sealed waterproof support includes a support body 1 and a surrounding plate 2. The upper and lower sides of the surrounding plate 2 are respectively sealed to the outer sides of the upper support plate 11 and the lower support plate 12 of the support body 1, forming a sealed cavity 3 inside the support body 1. The upper support plate 11 and / or the lower support plate 12 are provided with at least two through holes 4 communicating with the sealed cavity 3. At least one through hole 4 is connected to an oil supply pipe 41 for injecting anti-rust grease 31 into the sealed cavity 3. At least one through hole 4 is provided with a valve 42 for controlling the venting.

[0017] Its working principle is as follows: The support body 1 of the waterproof support is internally sealed by the surrounding plate 2. The sealing cavity 3 between the upper support plate 11 and the lower support plate 12 is injected with anti-rust grease 31, which can not only isolate the support body 1 to prevent water corrosion, but also keep the internal components in a lubricated state and reduce friction loss.

[0018] It should be noted that when adding anti-rust grease 31 to the sealing cavity 3, through holes 4 need to be provided on the upper support plate 11 and / or the lower support plate 12. During injection, it is also necessary to ensure that the sealing cavity 3 is vented and fully filled. Therefore, there should be at least two through holes 4, one for oil supply and one for venting. Valves 42 need to be installed in the through holes 4 to prevent water from entering.

[0019] In the structure constituting the above-mentioned novel corrosion-resistant, sealed, and waterproof support... Preferably, the outer surfaces of both the upper support plate 11 and the lower support plate 12 are covered with a rubber anti-corrosion layer 5. The rubber anti-corrosion layer 5 is connected to the upper support plate 11 and the lower support plate 12 by bonding or vulcanization, which simplifies the manufacturing process. The rubber anti-corrosion layer 5 can be composed of chloroprene rubber or fluororubber, or a composite structure can be selected. For example, from the outside to the inside, it consists of a copper-containing chlorosulfonated natural rubber antifouling layer, a chlorinated natural rubber anti-corrosion layer, a chlorosulfonated natural rubber anti-corrosion layer, and a zinc-rich inorganic silicate anti-rust underlayer. This maintains the anti-corrosion advantages of the chlorinated natural rubber coating while reducing the corrosion effect of marine microorganisms on the coating. The chlorosulfonated natural rubber anti-corrosion layer can be well compatible with and tightly bonded to the chlorinated natural rubber anti-corrosion layer and the zinc-rich inorganic silicate anti-rust underlayer, thereby improving the overall anti-corrosion performance of the coating. This makes the waterproof support particularly suitable for high-salt seawater steam fumigation, seawater splashing and wetting, and even periodic immersion conditions in seawater or highly corrosive urban sewage. —In one embodiment, both the upper support plate 11 and the lower support are provided with through holes 4, which are connected to oil supply pipes 41. A valve 42 is provided on the oil supply pipes 41. The valve 42 is a one-way valve or a ball valve. That is, the through holes 4 of the lower support plate 12 are connected to the oil supply pipes 41 for injecting rust-preventive grease 31, and the through holes 4' of the upper support plate 11 are connected to the oil supply pipes 41' for effective venting. The upper and lower through holes (4, 4') are vertically corresponding to form a working group to improve the oil injection and venting effect. Of course, there can be multiple working groups, which are symmetrically arranged on both sides of the support body 1 to further improve working efficiency. --like Figure 2 As shown, the aforementioned enclosure 2 is an elastic sheet that can flexibly deform to adapt to the sliding and turning needs of the support. The upper and lower edges of the enclosure 2 are respectively pressed and sealed to the outer walls of the upper support plate 11 and the lower support plate 12 by a number of stainless steel bolts 6. At the sealed connection, an oil-resistant rubber pad 61 is provided on the inner side of the enclosure 2, and a stainless steel pressure strip 62 is provided on the outer side of the enclosure 2. The bolts 6 pass through the stainless steel washer 63, the stainless steel pressure strip 62, the enclosure 2, and the oil-resistant rubber pad 61 in sequence and are tightened to the threaded holes on the outer walls of the upper support plate 11 or the lower support plate 12. This sealing structure is simple, easy to process, easy to install and maintain. The bolts 6 are evenly arranged around the outer walls of the upper support plate 11 or the lower support plate 12, which presses the enclosure 2 firmly and provides a stable and long-lasting sealing effect. —To further improve the sealing effect of the enclosure plate 2, several protruding ridges 71 are provided on the inner side of the oil-resistant rubber pad 61. The protruding ridges 71 correspond to the grooves 72 provided on the outer side wall of the upper support plate 11 or the lower support plate 12. The cooperation between the protruding ridges 71 and the grooves 72 not only positions the oil-resistant rubber 61 to prevent it from deforming or falling off, but also increases the sealing area to ensure long-term and stable sealing. — Preferably, the bearing body 1 includes a middle bearing body 13 disposed between the upper bearing plate 11 and the lower bearing plate 12. The middle bearing body 13 is a rubber bearing body or a friction pendulum, that is, the waterproof bearing is applicable to the technical improvement of various existing bridge bearings, such as a pot bearing where the middle bearing body 13 is a rubber bearing body, or a new type of vibration damping and isolation bearing where the middle bearing body 13 is a friction pendulum, which further improves the application range of the waterproof bearing; Specifically, the aforementioned friction pendulum is a hyperboloid spherical cap liner, which is respectively connected to the upper support plate 11, The spherical groove of the lower support plate 12 forms a spherical friction pair; or the friction pendulum is a single-curved spherical crown liner, with a spherical friction pair 81 on one side of its spherical curved surface and a planar friction pair 82 on one side of its planar surface. This waterproof support can meet the requirements of friction pendulum vibration reduction and isolation supports of different structures, forming a variety of new waterproof supports to meet different working conditions and usage scenarios. Furthermore, the upper surface of the upper support plate 11 is provided with an upper anchor bolt assembly 91, which is connected to the bridge beam; the lower surface of the lower support plate 12 is provided with a lower anchor bolt assembly 92, which is connected to the bridge pier, thereby improving the stability of this waterproof support, extending its working cycle, and making it economical and durable.

[0020] The embodiments described above are only used to illustrate the technical solutions of the present invention and are not limiting conditions for the implementation of the present invention. Therefore, any other modifications or equivalent substitutions in configuration, size, or internal structure made to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A corrosion-resistant, sealed, and waterproof support, characterized in that: The support includes a support body and a surrounding plate. The upper and lower sides of the surrounding plate are respectively sealed to the outer sides of the upper support plate and the lower support plate of the support body, forming a sealed cavity inside the support body. The upper support plate and / or the lower support plate are provided with at least two through holes communicating with the sealed cavity. At least one of the through holes is connected to an oil supply pipe for injecting rust-preventive grease into the sealed cavity. At least one of the through holes is provided with a valve for controlling venting.

2. The corrosion-resistant, sealed, and waterproof support according to claim 1, characterized in that: The outer surfaces of the upper and lower support plates are both covered with a rubber anti-corrosion layer, which is connected to the upper and lower support plates by bonding or vulcanization.

3. The corrosion-resistant, sealed, and waterproof support according to claim 1, characterized in that: Both the upper support plate and the lower support are provided with the through hole, the through hole is connected to the oil pipeline, and the oil pipeline is provided with the valve, which is a one-way valve or a ball valve.

4. The corrosion-resistant, sealed, and waterproof support according to claim 1, characterized in that: The enclosure is an elastic sheet. The upper and lower edges of the enclosure are respectively connected to the outer walls of the upper support plate and the lower support plate by a number of bolts. At the sealed connection, an oil-resistant rubber gasket is provided on the inner side of the enclosure, and a stainless steel pressure strip is provided on the outer side of the enclosure. The bolts pass through the stainless steel washer, the stainless steel pressure strip, the enclosure, the oil-resistant rubber gasket, and are tightened into the threaded holes on the outer walls of the upper support plate or the lower support plate.

5. A corrosion-resistant, sealed, waterproof support according to claim 4, characterized in that: The inner side of the oil-resistant rubber pad is provided with several protruding ridges, which correspond to the grooves provided on the outer side wall of the upper or lower support plate.

6. The corrosion-resistant, sealed, and waterproof support according to claim 1, characterized in that: The support body includes a middle support body disposed between the upper support plate and the lower support plate, wherein the middle support body is a rubber bearing body or a friction pendulum.

7. A corrosion-resistant, sealed, waterproof support according to claim 6, characterized in that: The friction pendulum is a hyperboloid spherical cap bushing, which mates with the spherical grooves of the upper and lower support plates to form a spherical friction pair; or the friction pendulum is a single-curved spherical cap bushing with a spherical curved surface. A spherical friction pair is provided on one side, and a planar friction pair is provided on the other side of the plane.

8. The corrosion-resistant, sealed, and waterproof support according to claim 1, characterized in that: The upper support plate is provided with an upper anchor bolt assembly on its upper surface, which is connected to the bridge beam; the lower support plate is provided with a lower anchor bolt assembly on its lower surface, which is connected to the bridge pier.

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