Bridge support void alarm device not influenced by support abrasion and rotation
By using normally closed microswitches in bridge bearings, combined with the magnetic adsorption of the detection cylinder, an arc-shaped plate, and a buffer spring, the problem of accuracy in alarming due to bearing wear and rotation was solved, enabling safe monitoring and timely alarm of bridge bearings.
Patent Information
- Application Number
- CN202520170895.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-25
AI Technical Summary
Existing bridge bearings are prone to detachment due to vehicle impacts during long-term use, and existing monitoring devices are unable to maintain accurate detachment alarms when the bearings are worn or rotating.
A normally closed micro switch and a detection cylinder are attached to the intermediate steel liner via a magnetic column. Combined with an arc-shaped plate and a buffer spring, this ensures accurate triggering of the cavitation alarm even when the support rotates or wears.
It achieves accurate alarm for bearing slippage under the influence of bearing wear and rotation, timely detection of bridge bearing abnormalities, reduction of safety hazards, and protection of bridge operation safety.
Smart Images
Figure CN223842479U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge bearing technology, specifically a bridge bearing detachment alarm device that is unaffected by bearing wear and rotation. Background Technology
[0002] Bridge bearings are crucial components connecting the superstructure and substructure of a bridge. Located between the piers and the beams, they play a vital role in transferring loads, accommodating deformation, and ensuring the stability and normal use of the bridge structure. Over long-term use, bearings may experience issues such as detachment due to various reasons. To effectively monitor the working status of bridge bearings and promptly detect abnormalities like detachment, it is necessary to detect and trigger alarms for detachment phenomena, while continuously monitoring the load distribution borne by the bearings.
[0003] In daily bridge operation, bridge bearings play a crucial supporting role. However, as vehicles shuttle back and forth on the bridge, the continuous force exerted by the vehicles impacts the connection between the bearings and the bridge, which can easily cause them to tilt and lead to the problem of separation between the bearings and the bridge. If the bridge bearings are not maintained in a timely manner, safety hazards in bridge operation will quietly emerge and accumulate, making it difficult to take timely and targeted repair measures. In the long run, the safe operation of the bridge will be impossible to guarantee. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a bridge bearing detachment alarm device that is not affected by bearing wear and rotation. In the safety monitoring of bridge bearings, a normally closed micro switch and a detection cylinder are firmly attached to the intermediate steel liner plate by a magnetic column. When the bearing is displaced by external force, the stainless steel plate at the bottom of the upper bearing plate always presses the micro switch tightly. Once the bearing is detached, the arc-shaped plate rebounds rapidly due to the elastic restoring force of the spring, accurately triggering the detachment alarm.
[0005] A bridge bearing slippage alarm device unaffected by bearing wear and rotation includes an upper bearing plate and a lower bearing plate. A steel basin is fixedly connected to the upper surface of the lower bearing plate. A rubber plate is embedded inside the steel basin. A brass ring is embedded on the outer surface of the rubber plate. The outer surface of the brass ring contacts the inner wall of the steel basin. An intermediate steel liner is embedded inside the steel basin. The bottom surface of the intermediate steel liner contacts the upper surface of the rubber plate. A PTFE plate is embedded in a groove at the top of the intermediate steel liner. A stainless steel plate is welded to the bottom surface of the upper bearing plate. The bottom surface of the stainless steel plate contacts the upper surface of the PTFE plate. An alarm unit is provided on the outer side of the intermediate steel liner.
[0006] Preferably, the alarm unit includes two detection cylinders, each detection cylinder having a first magnetic column fixedly connected to its inner wall, and each detection cylinder being attracted to the intermediate steel liner through the first magnetic column.
[0007] Preferably, each of the detection cylinders has two arc-shaped grooves on its outer surface, and each arc-shaped groove has a slider slidably connected inside it. Each slider has a second magnetic column fixedly connected to the end away from the detection cylinder, and the outer surface of each second magnetic column is attracted to the outer surface of the intermediate steel liner.
[0008] Preferably, each of the detection cylinders is provided with an L-shaped bracket inside, and the inner wall of each L-shaped bracket is threadedly connected to the inner wall of the detection cylinder with two positioning bolts.
[0009] Preferably, a normally closed micro switch is fixedly connected to the upper surface of each L-shaped bracket, a pressure cover is rotatably connected to the outer surface of each normally closed micro switch, a buffer spring is fixedly connected to the outer surface of each normally closed micro switch, and the bottom surface of each pressure cover contacts the outer surface of the normally closed micro switch and the top of the buffer spring, respectively.
[0010] Preferably, an arc-shaped piece is fixedly connected to the upper surface of each pressure cover, and one end of each arc-shaped piece and the top of the detection cylinder are in contact with the bottom surface of the stainless steel plate.
[0011] The beneficial effects of the above technical solution are as follows:
[0012] (1) In this scheme, by rotating the support as a whole, the stainless steel plate and the intermediate steel lining plate rotate at the same angle. The relative vertical angle between the arc plate and the normally closed micro switch does not change. That is, the accuracy of the vacancy alarm is not affected by the rotation of the support. As the PTFE plate wears, the stainless steel plate will press the detection cylinder and the arc plate to move downwards synchronously. The relative distance between the stainless steel plate and the arc plate remains unchanged, ensuring that the vacancy alarm accuracy is the same as the accuracy during installation. That is, the vacancy alarm accuracy is not affected by the wear of the support.
[0013] (2) In this scheme, the normally closed micro switch and the detection cylinder are firmly attached to the middle steel liner plate by the magnetic column. When the support is displaced by external force, the stainless steel plate at the bottom of the upper support plate always presses the micro switch tightly. Once the support is dislodged, the arc plate is not under pressure and rebounds rapidly with the elastic restoring force of the spring, accurately triggering the dislodged alarm. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is an exploded cross-sectional view of the upper support plate of this utility model.
[0016] Figure 3 This is an enlarged structural schematic diagram showing the details of the arc-shaped groove in this utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the stainless steel plate of this utility model;
[0018] Figure 5 This is a schematic diagram of the structure of the second magnetic column of this utility model;
[0019] Figure 6 This is a cross-sectional structural schematic diagram of the detection cylinder of this utility model;
[0020] Figure 7 This is a cross-sectional structural diagram of the arc-shaped groove of this utility model.
[0021] In the diagram: 1. Upper support plate; 2. Lower support plate; 3. Detection cylinder; 4. Steel basin; 5. PTFE plate; 6. Intermediate steel lining plate; 7. Brass ring; 8. Rubber plate; 9. Stainless steel plate; 10. Arc-shaped slide; 11. Second magnetic column; 12. Positioning bolt; 13. Arc-shaped piece; 14. First magnetic column; 15. Buffer spring; 16. Pressure cover; 17. Normally closed micro switch; 18. L-shaped bracket; 19. Slider. Detailed Implementation
[0022] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 7 As will be clearly shown in the detailed description of the embodiments, all structural contents mentioned in the following embodiments are based on the accompanying drawings.
[0023] Example 1: This example provides a bridge bearing detachment alarm device that is unaffected by bearing wear and rotation, such as... Figure 1 and Figure 2 As shown, the system includes an upper support plate 1 and a lower support plate 2. A steel basin 4 is fixedly connected to the upper surface of the lower support plate 2. A rubber plate 8 is embedded inside the steel basin 4. A brass ring 7 is embedded on the outer surface of the rubber plate 8. The outer surface of the brass ring 7 is in contact with the inner wall of the steel basin 4. A middle steel liner 6 is embedded inside the steel basin 4. The bottom surface of the middle steel liner 6 is in contact with the upper surface of the rubber plate 8. A PTFE plate 5 is embedded in the groove at the top of the middle steel liner 6. A stainless steel plate 9 is welded to the bottom surface of the upper support plate 1. The bottom surface of the stainless steel plate 9 is in contact with the upper surface of the PTFE plate 5. An alarm unit is provided on the outer side of the middle steel liner 6.
[0024] When using the gap alarm device, the upper support plate 1, lower support plate 2, stainless steel plate 9, PTFE plate 5, steel basin 4, rubber plate 8 and intermediate steel liner 6 together form a complete support system. By attaching the alarm unit to the outside of the intermediate steel liner 6 by magnetic attraction, the gap height between the stainless steel plate 9 and the intermediate steel liner 6 can be accurately detected directly, thus facilitating timely alarm for the maximum possible gap distance and achieving efficient monitoring function.
[0025] Example 2, based on Example 1, is improved in that, as follows: Figure 3 and Figure 6 As shown, the alarm unit includes two detection cylinders 3, and a first magnetic column 14 is fixedly connected to the inner wall of each detection cylinder 3. Each detection cylinder 3 is attracted to the intermediate steel liner plate 6 through the first magnetic column 14.
[0026] When using the cavitation alarm device, a first magnetic column 14 is fixed to the inner wall of the detection cylinder 3. The detection cylinder 3 is firmly magnetically attracted to the surface of the intermediate steel liner plate 6 by the first magnetic column 14. This brings two advantages: firstly, it effectively ensures the stability of the detection cylinder 3 under various working conditions, preventing it from easily shaking or shifting; secondly, when the support rotates due to external forces, the detection cylinder 3 can rely on the first magnetic column 14 to synchronously produce the same angular change or displacement change as the intermediate steel liner plate 6 and the stainless steel plate 9. This ensures that the detection cylinder 3 can maintain a vertical distance from the stainless steel plate 9 at all times, effectively ensuring that the accuracy of the cavitation alarm is not affected by the rotation of the support, and providing a reliable guarantee for the safety monitoring of the bridge support.
[0027] Example 3, based on Example 2, is improved in that, as follows: Figure 3 , Figure 6 and Figure 7 As shown, each detection cylinder 3 has two arc-shaped grooves 10 on its outer surface. Each arc-shaped groove 10 has a slider 19 slidably connected inside it. Each slider 19 has a second magnetic column 11 fixedly connected to the end away from the detection cylinder 3. The outer surface of each second magnetic column 11 is attracted to the outer surface of the middle steel liner 6.
[0028] When using the detachment alarm device, when the detection cylinder 3 is magnetically attracted to the intermediate steel liner 6 by the first magnetic post 14, the two second magnetic posts 11 on the outside of the detection cylinder 3 also play a key role. These two second magnetic posts 11 can generate mutual attraction with the intermediate steel liner 6, and they can slide flexibly inside the arc-shaped groove 10, thus directly and tightly adhering to the surface of the intermediate steel liner 6 by magnetic attraction. In this way, the second magnetic posts 11 and the first magnetic posts 14 cooperate with each other to directly ensure the stability of the overall adsorption state of the detection cylinder 3, making the detection cylinder 3 highly adaptable. Even when facing intermediate steel liners 6 of different diameters, it can firmly adhere to them by achieving three-point adsorption, laying a solid foundation for subsequent accurate detection work.
[0029] Example 4, based on Example 3, is improved in that, as follows: Figure 5 and Figure 6 As shown, each detection cylinder 3 is equipped with an L-shaped bracket 18 inside. The inner wall of each L-shaped bracket 18 is threadedly connected to the inner wall of the detection cylinder 3 with two positioning bolts 12. The upper surface of each L-shaped bracket 18 is fixedly connected with a normally closed micro switch 17. The outer surface of each normally closed micro switch 17 is rotatably connected with a pressure cover 16. The outer surface of each normally closed micro switch 17 is fixedly connected with a buffer spring 15. The bottom surface of each pressure cover 16 is in contact with the outer surface of the normally closed micro switch 17 and the top of the buffer spring 15, respectively.
[0030] When using the vacancy alarm device, the L-shaped bracket 18 can be fixed to the inner wall of the detection cylinder 3 by the positioning bolt 12, ensuring the overall stability of the L-shaped bracket 18 and reducing the impact of support vibration on the normally closed micro switch 17. The buffer spring 15 directly contacts the pressure cover 16, effectively increasing the elastic force of the normally closed micro switch 17, effectively improving the accuracy of the vacancy detection process, and avoiding the normally closed micro switch 17 being in a depressed state for a long time, which would reduce its elasticity and affect the alarm accuracy of the normally closed micro switch 17.
[0031] Example 5, based on Example 4, is improved in that, as follows: Figure 4 and Figure 6 As shown, an arc-shaped piece 13 is fixedly connected to the upper surface of each pressure cover 16, and one end of each arc-shaped piece 13 and the top of the detection cylinder 3 are in contact with the bottom surface of the stainless steel plate 9.
[0032] When using the detachment alarm device, the fixed end of the arc-shaped piece 13 is fixed to the upper surface of the pressure cover 16, while its free end is in close contact with the bottom surface of the stainless steel plate 9. Under normal circumstances, the pressure on the stainless steel plate 9 is directly transmitted to the pressure cover 16. Then, the pressure cover 16 applies this pressure to the bottom buffer spring 15 and the normally closed micro switch 17, keeping the normally closed micro switch 17 in the open state. However, once the stainless steel plate 9 is detached from the intermediate steel liner 6, the free end of the arc-shaped piece 13 loses contact with the bottom surface of the stainless steel plate 9, and the pressure from the stainless steel plate 9 disappears instantly. Immediately afterward, under the combined action of the upward elastic force of the normally closed micro switch 17 and the upward elastic force of the buffer spring 15 on the pressure cover 16, the arc-shaped piece 13 quickly extends upward, and the normally closed micro switch 17 immediately triggers the alarm, issuing a crucial warning to detect the abnormal condition of the bridge support in a timely manner.
[0033] Working Principle: In actual use scenarios of bridge bearings, the upper bearing plate 1, lower bearing plate 2, stainless steel plate 9, PTFE plate 5, steel basin 4, rubber plate 8, and intermediate steel lining plate 6 work together to form a complete bearing assembly. The rubber plate 8 plays a buffering and other auxiliary role, helping the bearing better cope with various external impacts. When installing the alarm unit, the detection cylinder 3 is installed first. A first magnetic column 14 is fixed on the inner wall of the detection cylinder 3. With the first magnetic column 14, the detection cylinder 3 can be stably magnetically attracted to the outer surface of the intermediate steel lining plate 6. This ensures the overall structural stability of the detection cylinder 3, preventing it from easily shaking or shifting; and also ensures that during the rotation of the bearing, the detection cylinder 3 can be attracted by the first magnetic column 14. The first magnetic column 14, in sync with the intermediate steel liner 6 and stainless steel plate 9, undergoes the same angular change or displacement, ensuring that the detection cylinder 3 maintains a perpendicular distance from the stainless steel plate 9. This guarantees that the accuracy of the vacancy alarm will not be affected by the rotation of the support. Simultaneously, as the detection cylinder 3 is magnetically attracted to the intermediate steel liner 6 via the first magnetic column 14, the two second magnetic columns 11 on the outer side of the detection cylinder 3 also play a crucial role. They can attract each other to the intermediate steel liner 6 and slide flexibly within the arc-shaped groove 10 via the slider 19, ultimately being directly magnetically attracted to the surface of the intermediate steel liner 6. These two second magnetic columns 11, in conjunction with the first magnetic column 14, further enhance the overall adsorption stability of the detection cylinder 3, giving it strong versatility, even on surfaces... For intermediate steel lining plates 6 of different diameters, three-point adsorption can be achieved to ensure stable adsorption onto the intermediate steel lining plate 6. During the inspection of bridge bearings, a buffer spring 15 is fixed to the surface of the normally closed micro switch 17. The top of the buffer spring 15 is in close contact with the bottom surface of the pressure cover 16. This not only effectively enhances the elasticity of the normally closed micro switch 17, preventing the arc-shaped plate 13 from weakening due to prolonged pressure, but also buffers minor pressure fluctuations to a certain extent, effectively improving the accuracy of the release detection. The pressure cover 16 and the normally closed micro switch 17 work closely together to accurately transmit pressure. Under normal conditions, the stainless steel plate 9 presses down on the arc-shaped plate 13, causing it to bear force, which in turn directly presses down on the pressure cover 16, ultimately causing the normally closed micro switch 17 to... When the circuit is open, no alarm signal will be emitted. When the support rotates, the stainless steel plate 9 at the bottom of the upper support plate 1 will rotate synchronously with the middle steel lining plate 6, maintaining the same angle. This characteristic ensures that the relative vertical angle between the arc-shaped plate 13 and the normally closed micro switch 17 remains constant, effectively ensuring that the alarm accuracy is not affected by the rotation of the support and preventing false triggering or failure of the normally closed micro switch 17 due to angle changes. During the use of the support, if the PTFE plate 5 wears, the stainless steel plate 9 will press down on the detection cylinder 3 and move downwards synchronously. During this process, the arc-shaped plate 13 will not be further compressed, meaning that the rebound height required for the alarm remains constant, i.e., the alarm accuracy is not affected by support wear.Once the support detachment height reaches the alarm threshold, the stainless steel plate 9 will detach from the free end of the arc-shaped piece 13 and the top of the detection cylinder 3. At this time, the arc-shaped piece 13 loses the pressure of the stainless steel plate 9. Under the upward rebound force of the normally closed micro switch 17 and the buffer spring 15, it pushes up the pressure cover 16 and causes the arc-shaped piece 13 to extend upward. The pressure cover 16 no longer presses down on the normally closed micro switch 17, and the state of the normally closed micro switch 17 changes from open to closed, triggering the alarm circuit. The alarm chip in the circuit promptly sends an alarm signal of bridge support detachment to the online signal receiving server. In this way, maintenance personnel can respond quickly, take targeted measures, effectively reduce safety hazards during bridge use, repair the support in a timely manner, and effectively ensure the safe operation of the bridge.
[0034] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.
Claims
1. A bridge bearing slippage alarm device unaffected by bearing wear and rotation, comprising an upper bearing plate (1) and a lower bearing plate (2), characterized in that: A steel basin (4) is fixedly connected to the upper surface of the lower support plate (2). A rubber plate (8) is embedded inside the steel basin (4). A brass ring (7) is embedded on the outer surface of the rubber plate (8). The outer surface of the brass ring (7) is in contact with the inner wall of the steel basin (4). A middle steel liner plate (6) is embedded inside the steel basin (4). The bottom surface of the middle steel liner plate (6) is in contact with the upper surface of the rubber plate (8). A PTFE plate (5) is embedded in the groove at the top of the middle steel liner plate (6). A stainless steel plate (9) is welded to the bottom surface of the upper support plate (1). The bottom surface of the stainless steel plate (9) is in contact with the upper surface of the PTFE plate (5). An alarm unit is provided on the outer side of the middle steel liner plate (6).
2. The bridge bearing detachment alarm device unaffected by bearing wear and rotation according to claim 1, characterized in that: The alarm unit includes two detection cylinders (3), and a first magnetic column (14) is fixedly connected to the inner wall of each detection cylinder (3). Each detection cylinder (3) is attracted to the intermediate steel liner (6) through the first magnetic column (14).
3. The bridge bearing detachment alarm device unaffected by bearing wear and rotation according to claim 2, characterized in that: Two arc-shaped grooves (10) are opened on the outer surface of each of the detection cylinders (3). A slider (19) is slidably connected inside each of the arc-shaped grooves (10). A second magnetic column (11) is fixedly connected to one end of each slider (19) away from the detection cylinder (3). The outer surface of each second magnetic column (11) is attracted to the outer surface of the intermediate steel liner (6).
4. The bridge bearing detachment alarm device unaffected by bearing wear and rotation according to claim 2, characterized in that: Each of the detection cylinders (3) is provided with an L-shaped bracket (18) inside, and the inner wall of each L-shaped bracket (18) is threadedly connected to the inner wall of the detection cylinder (3) with two positioning bolts (12).
5. The bridge bearing detachment alarm device according to claim 4, which is unaffected by bearing wear and rotation, is characterized in that: Each L-shaped bracket (18) has a normally closed micro switch (17) fixedly connected to its upper surface. Each normally closed micro switch (17) has a pressure cap (16) rotatably connected to its outer surface. Each normally closed micro switch (17) has a buffer spring (15) fixedly connected to its outer surface. The bottom surface of each pressure cap (16) is in contact with the outer surface of the normally closed micro switch (17) and the top of the buffer spring (15).
6. The bridge bearing detachment alarm device unaffected by bearing wear and rotation according to claim 5, characterized in that: An arc-shaped piece (13) is fixedly connected to the upper surface of each pressure cover (16), and one end of each arc-shaped piece (13) and the top of the detection cylinder (3) are in contact with the bottom surface of the stainless steel plate (9).