Steel structure multi-stage damping protection maintainable wave-shaped friction gasket assembly

Abstract

The invention discloses a steel structure multistage damping protection maintainable wave-shaped friction gasket assembly which is provided with a bolt base, a connecting bolt is arranged on the bolt base, a high-strength nut is installed on the connecting bolt, a friction gasket assembly body is arranged between the high-strength nut and the bolt base, and the friction gasket assembly body comprises a dustproof outer sleeve. An upper sealing gasket and a lower sealing gasket are respectively arranged at the upper end and the lower end of the dustproof outer sleeve; a first gasket, a first wave sheet, a second gasket, a second wave sheet and a third gasket are sequentially arranged in the dustproof outer sleeve from top to bottom; the inner side wall of the dustproof outer sleeve is provided with circular ring oil injection grooves corresponding to the first wave sheet and the second wave sheet respectively, the upper sealing gasket is provided with at least one oil injection hole, and vertical oil injection channels are arranged at the same positions of the first gasket and the second gasket below each oil injection hole; the structure can greatly cope with corrosion and vibration damage of a severe environment to a steel structure bolt fixing connecting piece, and the service life cycle of the steel structure bolt fixing connecting piece is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of large-scale steel structure connectors, in particular to a multi-stage shock-absorbing and protective maintainable wavy friction pad assembly for steel structures. Background Art

[0002] Bolted connection nodes in steel structure-assembled bridges, wind power facilities, high-speed rail buildings and other harsh working conditions are often subject to challenges from the complex external environment. For example, when these large steel structures are operating outdoors, they are often subjected to strong winds. The high-strength connection bolts at the steel structure connection nodes are rigidly connected and are prone to loosening or even breaking over time, affecting safety. The high-strength bolts at some steel structure connection nodes are corroded by the environment and rusted severely, making it difficult to unscrew the screws during later maintenance, making them difficult to maintain or replace.

[0003] Currently, many of these steel structure connections utilize traditional friction gaskets. However, over time, these friction gaskets can experience adhesion failure and environmental corrosion sensitivity, leading to substandard connection performance, difficult maintenance, and high lifecycle costs. Summary of the Invention

[0004] The purpose of the present invention is to address the above situation and provide a steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly. The structure of the present invention can greatly cope with the corrosion and vibration damage to the steel structure bolt fixing connectors in harsh environments, thereby improving its service life.

[0005] The specific solution of the present invention is: a steel structure multi-stage shock absorption protection maintainable wavy friction gasket assembly, which has a bolt base, a connecting bolt is arranged on the bolt base, a high-strength nut is installed on the connecting bolt, and a friction gasket assembly is arranged between the high-strength nut and the bolt base, and the friction gasket assembly includes a dustproof outer sleeve, which is sleeved on the connecting bolt, and the upper and lower ends of the dustproof outer sleeve are respectively provided with an upper sealing gasket and a lower sealing gasket, and a first gasket, a first wave plate, a second gasket, a second wave plate and a third gasket are sequentially installed in the dustproof outer sleeve from top to bottom, and the centers of the first gasket, the first wave plate, the second gasket, the second wave plate and the third gasket are all provided with coaxial circular holes and are sleeved on the connecting On the bolt, the third gasket is placed on the lower sealing gasket and its bottom surface is flush with the bottom surface of the dust-proof outer sleeve when in use. The first gasket is in contact with and connected to the bottom surface of the upper sealing gasket. When installed and used, the top surface height of the first gasket is kept higher than the top surface height of the dust-proof outer sleeve; circular annular oil filling grooves are respectively provided on the inner side wall of the dust-proof outer sleeve corresponding to the first wave plate and the second wave plate, and at least one oil filling hole is provided on the upper sealing gasket, and a one-way valve is built into the oil filling hole. A vertical oil filling channel is provided at the same position on the first gasket and the second gasket below each oil filling hole, and the vertical oil filling channel leads to the grooves of the first wave plate and the second wave plate, and the oil filling hole is connected to the vertical oil filling channel on the first gasket.

[0006] Furthermore, in the present invention, the first gasket, the second gasket and the third gasket are all made of nickel-plated steel strips and are all made into circular ring shapes. The upper and lower surfaces of the first gasket, the second gasket and the third gasket are all flat and smooth.

[0007] Furthermore, in the present invention, the first wave plate and the second wave plate are both made of stainless steel wave plates and cut into a circular ring shape.

[0008] Furthermore, the dustproof outer sleeve of the present invention is composed of two semi-cylinders, one side of the two semi-cylinders is connected by a hinge, and the other side of the two semi-cylinders is locked by an elastic buckle, and the connection between the two semi-cylinders is in close contact.

[0009] Furthermore, the two semi-cylinders in the present invention are made of plastic cylinders or stainless steel cylinders.

[0010] Furthermore, the upper sealing gasket and the lower sealing gasket in the present invention are both annular sealing gaskets, the bottom surface of the upper sealing gasket is coated with PTFE material, and the top surface is coated with fluororubber material; the bottom surface of the lower sealing gasket is coated with fluororubber material, and the top surface is coated with PTFE material.

[0011] Furthermore, in the present invention, high-performance lithium-based grease is filled between the first corrugated plate and the second corrugated plate.

[0012] The present invention has the following beneficial effects: 1. This solution extends the maintenance cycle of friction connectors by more than three times through the combination of structural innovation and safety protection. The inventive structure increases the grease retention rate and reduces the loss rate of the connecting bolt preload, greatly extending its service life.

[0013] 2. The dustproof outer sleeve designed in the present invention can greatly cope with the corrosion of bolt fasteners in harsh environments. During later maintenance, only grease needs to be added. There is no need to disassemble the main body to add grease to extend its service life. It is particularly suitable for application scenarios in extreme environments such as steel structure bridge supporting facilities, and has significant economic benefits and engineering practical value.

[0014] 3. The friction gasket assembly of the present invention includes an upper nickel-plated steel strip (first gasket) → a corrugated stainless steel sheet (first corrugated sheet) → a middle nickel-plated steel strip (second gasket) → a lower corrugated sheet (second corrugated sheet) → a lower nickel-plated steel strip (second gasket), a total of 3 steel strips + 2 corrugated sheets. The connection between the high-strength nuts, connecting bolts and steel structure steel plates has obvious elastic buffering, which can greatly reduce the shaking impact at the connection of outdoor steel structure parts, greatly extend its service life, and the subsequent maintenance is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the present invention in the main viewing direction (the inner side of the dustproof outer sleeve is cut open); Figure 2 It is a schematic diagram of the structure of the dustproof outer sleeve in the present invention; Figure 3 This is a schematic diagram of the structure of the upper sealing gasket in the present invention; Figure 4 This is a schematic diagram of the first gasket structure in the present invention; Figure 5 is a schematic top view of the first wave plate in the present invention; Figure 6 yes Figure 5 Schematic diagram of the main viewing direction; Figure 7 yes Figure 5 Schematic diagram of the side view direction; Figure 8 It is a schematic diagram of the state of the present invention when it is connected to the steel plate of the steel structure.

[0016] In the figure: 1—connecting bolt, 2—high-strength nut, 3—third gasket, 4—lower sealing gasket, 5—upper sealing gasket, 6—first gasket, 7—first wave plate, 8—second gasket, 9—second wave plate, 10—dustproof outer sleeve, 11—bolt base, 12—elastic buckle, 13—semi-cylinder, 14—circular annular oil filling groove, 15—oil filling hole, 16—vertical oil filling channel, 17—steel component steel plate, 18—high-performance lithium-based grease. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. It is obvious that the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0019] See also Figures 1 to 7The present invention is a steel structure multi-stage shock absorption protection maintainable wavy friction gasket assembly, which has a bolt base 11, a connecting bolt 1 is arranged on the bolt base, a high-strength nut 2 is installed on the connecting bolt, and a friction gasket assembly is arranged between the high-strength nut and the bolt base, and the friction gasket assembly includes a dustproof outer sleeve 10, which is sleeved on the connecting bolt, and an upper sealing gasket 5 and a lower sealing gasket 4 are respectively provided on the upper and lower ends of the dustproof outer sleeve. Further, the dustproof outer sleeve in the present invention is composed of two semi-cylinders 13, one side of the two semi-cylinders is connected by a hinge, and the other side of the two semi-cylinders is locked and connected by an elastic buckle 12, and the junction of the two semi-cylinders is in close contact. Further, the two semi-cylinders in the present invention are made of plastic cylinders or stainless steel cylinders, and the first gasket 6, the first wave plate 7, the second gasket 8, the second wave plate 9, the second wave plate 10 are sequentially installed in the dustproof outer sleeve from top to bottom. The wave flap 9 and the third gasket 3, the first gasket, the first wave flap, the second gasket, the second wave flap and the third gasket are all provided with coaxial circular holes at the center and are simultaneously mounted on the connecting bolts, the third gasket is placed on the lower sealing gasket and its bottom surface is flush with the bottom surface of the dust-proof outer sleeve when in use, the first gasket is in contact with and connected to the bottom surface of the upper sealing gasket, and the top surface height of the first gasket is kept higher than the top surface height of the dust-proof outer sleeve during installation and use; circular annular oil filling grooves 14 are respectively provided on the inner side wall of the dust-proof outer sleeve corresponding to the first wave flap and the second wave flap, the upper sealing gasket is provided with at least one oil filling hole 15, and a one-way valve is built into the oil filling hole, and a vertical oil filling channel 16 is provided at the same position on the first gasket and the second gasket below each oil filling hole, the vertical oil filling channel leads to the grooves of the first wave flap and the second wave flap, and the oil filling hole is connected to the vertical oil filling channel on the first gasket. Furthermore, the first, second, and third gaskets of the present invention are all made of nickel-plated steel strips and are each formed into a circular ring shape. The first, second, and third gaskets each have a smooth upper and lower surface. Furthermore, the first and second corrugated plates of the present invention are both made of stainless steel corrugated plates and are cut into a circular ring shape.

[0020] Furthermore, in this embodiment, both the upper and lower sealing gaskets are annular sealing gaskets. The upper sealing gasket has a bottom surface coated with PTFE and a top surface coated with fluororubber; the lower sealing gasket has a bottom surface coated with fluororubber and a top surface coated with PTFE. Furthermore, in the present invention, a high-performance lithium-based grease 18 is filled between the first and second corrugated plates.

[0021] The entire assembly process of the present invention is as follows: Figure 8 Shown:‌ 1. First, put the steel plate of the steel component downward on the connecting bolts so that the steel plate of the steel component is placed on the bolt base; 2. Insert the core friction pad assembly into the connecting bolts; 3. Fasten the dustproof outer sleeve and lock the elastic buckle; 4. Use a grease gun to inject grease from the oil filling hole (pressure 0.5-0.8MPa); 5. Tighten the high-strength nut to the designed preload force (using the hydraulic wrench indication method) to complete the connection.

[0022] When the present invention is actually implemented, the height of the upper end surface of the dustproof outer sleeve can be slightly lower, so as to ensure that the high-strength nut above transmits the elastic force to the steel plate of the steel component below through the elastic gasket assembly composed of the first gasket, the first wave plate, the second gasket, the second wave plate and the third gasket in the middle, thereby reducing the damage to the connection node caused by vibration and shaking; the upper sealing gasket 5 and the lower sealing gasket 4 designed in the present invention can effectively isolate the steel plate from rusting due to long-term use, harsh environment and other factors. Even if it is rusted, due to the isolation of the upper sealing gasket 5 and the lower sealing gasket 4, the steel plate and the high-strength nut above and the related gaskets will not stick together, and the subsequent maintenance and replacement will be more convenient and labor-saving.

[0023] When adding grease in the later stage of the present invention, the two semi-cylinders can be opened and grease can be added from the side. In this way, there is no need to add grease from the high-strength nut above, which is also very convenient. The dustproof outer sleeve is used to wrap the grease inside to prevent it from flowing out, thereby extending its service life and replacement cycle.

[0024] The friction gasket assembly in the present invention includes an upper nickel-plated steel strip (first gasket) → a corrugated stainless steel sheet (first corrugated sheet) → a middle nickel-plated steel strip (second gasket) → a lower corrugated sheet (second corrugated sheet) → a lower nickel-plated steel strip (second gasket), a total of 3 steel strips + 2 corrugated sheets. The connection between the high-strength nuts, connecting bolts and steel structure steel plates has obvious elastic buffering, which can greatly reduce the shaking impact at the connection of outdoor steel structure parts, greatly extend its service life, and the later maintenance is relatively simple.

[0025] This solution extends the maintenance cycle of friction connectors by more than three times through a combination of structural innovation and safety protection. By increasing the grease retention rate and reducing the loss rate of preload force on the connecting bolts, the inventive structure significantly extends their service life. The dustproof outer sleeve designed in this invention can effectively deal with corrosion on bolt fasteners in harsh environments. Later maintenance only requires grease replenishment, without disassembling the main body to refill the lubricant to extend its service life. It is particularly suitable for extreme environment applications such as steel structure bridge supporting facilities, and has significant economic benefits and engineering practical value.

Claims

1. A steel structure multi-stage shock absorption protection maintainable corrugated friction pad assembly, characterized by: It has a bolt base, a connecting bolt is arranged on the bolt base, a high-strength nut is installed on the connecting bolt, a friction gasket assembly is arranged between the high-strength nut and the bolt base, and the friction gasket assembly includes a dustproof outer sleeve, which is sleeved on the connecting bolt, and an upper sealing gasket and a lower sealing gasket are respectively provided at the upper and lower ends of the dustproof outer sleeve. A first gasket, a first wave plate, a second gasket, a second wave plate and a third gasket are sequentially installed in the dustproof outer sleeve from top to bottom, and the centers of the first gasket, the first wave plate, the second gasket, the second wave plate and the third gasket are all provided with coaxial circular holes and are sleeved on the connecting bolt at the same time, and the third gasket is placed on the lower sealing gasket The sealing gasket is arranged on the sealing gasket and its bottom surface is flush with the bottom surface of the dust-proof outer sleeve when in use. The first gasket is in contact with the bottom surface of the upper sealing gasket, and the top surface height of the first gasket is kept higher than the top surface height of the dust-proof outer sleeve when installed and used; circular annular oil filling grooves are respectively provided on the inner side wall of the dust-proof outer sleeve corresponding to the first wave plate and the second wave plate, and at least one oil filling hole is provided on the upper sealing gasket, and a one-way valve is built into the oil filling hole. A vertical oil filling channel is provided at the same position on the first gasket and the second gasket below each oil filling hole, and the vertical oil filling channel leads to the grooves of the first wave plate and the second wave plate, and the oil filling hole is connected to the vertical oil filling channel on the first gasket.

2. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 1, characterized in that: The first gasket, the second gasket and the third gasket are all made of nickel-plated steel strips and are all made into a ring shape. The upper and lower surfaces of the first gasket, the second gasket and the third gasket are all flat and smooth.

3. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 1, characterized in that: The first wave plate and the second wave plate are both made of stainless steel wave plates and cut into circular ring shapes.

4. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 1, characterized in that: The dustproof outer sleeve is composed of two semi-cylinders, one side of the two semi-cylinders is connected by a hinge, and the other side of the two semi-cylinders is locked and connected by an elastic buckle, and the joints of the two semi-cylinders are in close contact.

5. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 4, characterized in that: The two semi-cylinders are made of plastic cylinders or stainless steel cylinders.

6. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 1, characterized in that: The upper sealing gasket and the lower sealing gasket are both annular sealing gaskets. The bottom surface of the upper sealing gasket is coated with PTFE material, and the top surface thereof is coated with fluororubber material; the bottom surface of the lower sealing gasket is coated with fluororubber material, and the top surface thereof is coated with PTFE material.

7. The steel structure multi-stage shock absorption protection maintainable wavy friction pad assembly according to claim 1, characterized in that: The middle of the first wave plate and the second wave plate is filled with high-performance lithium-based grease.

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