Bolt connection structure for controlling rubber sealing gasket to apply pretightening force
By combining bolted connections with metal gaskets, the preload of the rubber gasket is controlled, resolving the contradiction between sealing and reusability in modular buildings, and achieving efficient sealing and reusability of the rubber gasket.
Patent Information
- Application Number
- CN202423017189.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In modular buildings, there is a contradiction between sealing performance and reusability when applying pre-tightening force to rubber gaskets. In addition, the cost of accurately applying pre-tightening force is high and the construction is difficult.
The system employs a bolted connection structure, using fixed bolts and metal gaskets to control the preload of the rubber gasket, ensuring that the rubber gasket operates within its elastic deformation range. The metal gaskets prevent excessive compression, enabling the rubber gasket to be reused.
It improves the sealing performance and construction efficiency of building modules, reduces construction difficulty, ensures the reusability of rubber gaskets, and avoids plastic deformation.
Smart Images
Figure CN223497349U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of modular building technology, specifically to a bolt connection structure for controlling the preload applied to a rubber sealing gasket. Background Technology
[0002] With the promotion of modular buildings, the sealing problem between building modules has gradually become a pain point in the industry compared with traditional on-site construction or semi-prefabricated construction methods.
[0003] Because modular buildings are excellent in terms of disassembly, relocation, and quick and convenient installation, their waterproofing layers cannot be constructed on-site as a whole, like in prefabricated or semi-prefabricated buildings. Furthermore, the requirements for discontinuous waterproofing layers, support for repeated disassembly and reassembly, and low cost present significant challenges to the sealing structure of building modules.
[0004] While sealing gaskets can solve the problem of building airtightness, their application in modular buildings faces several contradictions. On the one hand, a larger preload corresponds to better sealing performance, but a larger preload can cause plastic deformation of the gasket, making it unusable. Therefore, there is a contradiction between sealing performance and the reusability of building modules. To resolve this contradiction, the rubber gasket needs to operate within its elastic deformation range. However, another contradiction exists: the construction cost of accurately applying the preload is at odds with the requirement for precise preload accuracy when the rubber gasket operates within its elastic range. Utility Model Content
[0005] The purpose of this utility model is to provide a bolt connection structure for controlling the preload of the rubber gasket, thereby solving the above-mentioned problems and accurately controlling the preload of the rubber gasket so that the rubber gasket remains within the elastic deformation range.
[0006] Technical Solution: This utility model provides a bolted connection structure for controlling the preload of a rubber sealing gasket, comprising: a first building module, a second building module, a fixing bolt, a metal gasket, and a rubber sealing gasket. The first building module has a first connecting portion on one side; the second building module has a second connecting portion on one side. The first and second building modules are connected and fixed together via the first and second connecting portions. The fixing bolt passes through the first and second connecting portions and, in conjunction with a nut, connects and fixes the first and second connecting portions. The metal gasket is disposed on the fixing bolt between the first and second connecting portions. The rubber sealing gasket is disposed between the first and second connecting portions, near the second building module. The building modules are fixedly connected by the fixing bolt, providing preload. By placing the rubber sealing gasket between the connecting portions, the rubber sealing gasket is compressed during tightening, improving the sealing effect. The metal gasket prevents excessive compression of the rubber sealing gasket, allowing the rubber sealing gasket to be reused.
[0007] Furthermore, in the bolt connection structure described above for controlling the preload of the rubber sealing gasket, the first building module is located near the exterior of the building, and the second building module is located near the interior of the building.
[0008] Furthermore, in the aforementioned bolt connection structure for controlling the preload of the rubber gasket, the second connection portion is lower than the first connection portion, and a gap exists between them. This gap extends out of the rubber gasket installation area, improving the sealing performance of the connection between modular buildings.
[0009] Furthermore, in the bolt connection structure described above for controlling the preload of the rubber sealing gasket, the thickness of the metal gasket is equal to the gap width between the first and second connecting parts after the fixing bolt and nut are tightened; the initial thickness of the rubber sealing gasket is greater than the gap between the first and second connecting parts, and the thickness is within 10% wider than the gap.
[0010] Furthermore, in the aforementioned bolt connection structure for controlling the preload of the rubber gasket, the rubber gasket is made of a material with a large elastic compression deformation range, and the thickness of the rubber gasket is 7%-15% thicker than that of the metal gasket. This ensures that the compression space of the rubber gasket is within 7%-15%, which will not exceed the theoretical mechanical compression of the rubber, thus avoiding further compression that could lead to plastic deformation and allowing the rubber gasket to be reused.
[0011] Furthermore, in the bolt connection structure described above for controlling the preload of the rubber sealing gasket, the metal gasket can be fixedly installed on the first connection part or the second connection part, and the rubber sealing gasket can be fixedly installed on the first connection part or the second connection part, which makes it more convenient for direct on-site construction.
[0012] As can be seen from the above technical solution, the present invention has the following beneficial effects: The bolt connection structure for controlling the pre-tightening force of the rubber sealing gasket described in the present invention reduces the difficulty of on-site construction. When tightening the sealing bolt, the same torque wrench as the bolts for tightening the structural connection can be used. On the other hand, the metal gasket can bear a higher pre-tightening force, thus ensuring that the rubber sealing gasket is in an elastic deformation state, and more reliably transmitting the force between the first building module and the second building module. It can play the function of structural connection, avoid further compression leading to plastic deformation, and enable the rubber sealing gasket to be reused. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a bolt connection structure for controlling the preload of a rubber sealing gasket according to the present invention.
[0014] In the figure: First building module 1, second building module 2, fixing bolt 3, metal gasket 4, rubber sealing gasket 5, first connecting part 11, second connecting part 21, nut 31. Detailed Implementation
[0015] Example 1
[0016] like Figure 1 The bolted connection structure for controlling the preload of a rubber gasket, as shown, includes: a first building module 1, a second building module 2, a fixing bolt 3, a metal gasket 4, and a rubber gasket 5. The first building module 1 has a first connecting portion 11 on one side; the second building module 2 has a second connecting portion 21 on one side. The first building module 1 and the second building module 2 are connected and fixed together via the first connecting portion 11 and the second connecting portion 21. The fixing bolt 3 passes through the first connecting portion 11 and the second connecting portion 21, and, in conjunction with a nut 31, connects and fixes the first connecting portion 11 and the second connecting portion 21. The metal gasket 4 is disposed on the fixing bolt 3 between the first connecting portion 11 and the second connecting portion 21. The rubber gasket 5 is disposed between the first connecting portion 11 and the second connecting portion 21, near the second building module 2. The building modules are fixedly connected by the fixing bolt 3, providing preload. By placing the rubber gasket 5 between the connecting portions, the rubber gasket 5 is compressed during tightening, improving the sealing effect. The metal gasket 4 prevents excessive compression of the rubber gasket 5, thus allowing the rubber gasket 5 to be reused.
[0017] In this embodiment, the first building module 1 is located near the exterior of the building, and the second building module 2 is located near the interior of the building.
[0018] In this embodiment, the second connecting part 21 is lower than the first connecting part 11, and a gap exists between them. This gap allows the rubber sealing gasket 5 to flow out of the designated area, improving the sealing performance of the connection between the modular buildings.
[0019] Example 2
[0020] Based on Example 1, in this example, as... Figure 1The diagram illustrates a bolted connection structure for controlling the preload applied to a rubber gasket. The thickness of the metal gasket 4 is equal to the width of the gap between the first connecting portion 11 and the second connecting portion 21 after the fixing bolt 3 and nut 31 are tightened. The initial thickness of the rubber gasket 5 is greater than the gap between the first connecting portion 11 and the second connecting portion 21, and the thickness is within 10% of the gap width. The rubber gasket 5 is made of a material with a large elastic compression deformation range, and its thickness is 7%-15% thicker than the metal gasket 4. This ensures that the compression space of the rubber gasket 5 is within 7%-15%, not exceeding the theoretical mechanical compression of the rubber, avoiding further compression leading to plastic deformation, and allowing the rubber gasket 5 to be reused.
[0021] In this embodiment, the metal gasket 4 can be pre-fixed on the first connecting part 11 or the second connecting part 21 by welding or gluing, and the rubber sealing gasket 5 can be fixed on the first connecting part 11 or the second connecting part 21, integrating the components into the building module, which is more convenient for direct on-site construction.
[0022] In this embodiment, the rubber sealing gasket 5 is made wider, bolt holes are opened on the rubber sealing gasket 5, and the metal gasket 4 is embedded in the rubber sealing gasket 5 and set between the first connecting part 11 and the second connecting part 21, which makes on-site construction more convenient.
[0023] It should be noted that the above description is merely a technical solution of the utility model and not a limitation. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the present utility model, and all such modifications and substitutions should be covered within the scope of the claims of the present utility model.
Claims
1. A bolted connection structure for controlling the preload applied to a rubber sealing gasket, characterized in that: include: The first building module (1) has a first connecting part (11) on one side; The second building module (2) has a second connecting part (21) on one side; the first building module (1) and the second building module (2) are connected and fixed to each other through the first connecting part (11) and the second connecting part (21); A fixing bolt (3) passes through the first connecting part (11) and the second connecting part (21), and is fitted with a nut (31) to connect and fix the first connecting part (11) and the second connecting part (21); A metal washer (4) is disposed on a fixing bolt (3) between a first connecting part (11) and a second connecting part (21); A rubber sealing gasket (5) is disposed between the first connecting part (11) and the second connecting part (21), near the second building module (2).
2. The bolt connection structure for controlling the preload of the rubber sealing gasket according to claim 1, characterized in that: The second connecting part (21) is lower in height than the first connecting part (11), and there is a gap between them.
3. The bolt connection structure for controlling the application of preload to the rubber sealing gasket according to claim 1, characterized in that: The thickness of the metal gasket (4) is equal to the gap width between the first connecting part (11) and the second connecting part (21) after the fixing bolt (3) and nut (31) are tightened.
4. The bolt connection structure for controlling the application of preload to the rubber sealing gasket according to claim 1, characterized in that: The rubber sealing gasket (5) is made of a material with a large range of elastic compression deformation, and the thickness of the rubber sealing gasket (5) is greater than the thickness of the metal gasket (4).
5. The bolt connection structure for controlling the application of preload to the rubber sealing gasket according to claim 1, characterized in that: The metal gasket (4) can be fixedly mounted on the first connecting part (11) or the second connecting part (21).
6. The bolt connection structure for controlling the application of preload to the rubber sealing gasket according to claim 1, characterized in that: The rubber sealing gasket (5) can be fixedly installed on the first connecting part (11) or the second connecting part (21).